WO2018012390A1 - 位相差フィルム、楕円偏光板及びそれを用いた表示装置 - Google Patents
位相差フィルム、楕円偏光板及びそれを用いた表示装置 Download PDFInfo
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- WO2018012390A1 WO2018012390A1 PCT/JP2017/024776 JP2017024776W WO2018012390A1 WO 2018012390 A1 WO2018012390 A1 WO 2018012390A1 JP 2017024776 W JP2017024776 W JP 2017024776W WO 2018012390 A1 WO2018012390 A1 WO 2018012390A1
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- LLEMOWNGBBNAJR-UHFFFAOYSA-N ortho-phenyl-phenol Natural products OC1=CC=CC=C1C1=CC=CC=C1 LLEMOWNGBBNAJR-UHFFFAOYSA-N 0.000 description 1
- 235000010292 orthophenyl phenol Nutrition 0.000 description 1
- AFDXODALSZRGIH-UHFFFAOYSA-N p-coumaric acid methyl ether Natural products COC1=CC=C(C=CC(O)=O)C=C1 AFDXODALSZRGIH-UHFFFAOYSA-N 0.000 description 1
- DGBWPZSGHAXYGK-UHFFFAOYSA-N perinone Chemical compound C12=NC3=CC=CC=C3N2C(=O)C2=CC=C3C4=C2C1=CC=C4C(=O)N1C2=CC=CC=C2N=C13 DGBWPZSGHAXYGK-UHFFFAOYSA-N 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 125000002080 perylenyl group Chemical group C1(=CC=C2C=CC=C3C4=CC=CC5=CC=CC(C1=C23)=C45)* 0.000 description 1
- CSHWQDPOILHKBI-UHFFFAOYSA-N peryrene Natural products C1=CC(C2=CC=CC=3C2=C2C=CC=3)=C3C2=CC=CC3=C1 CSHWQDPOILHKBI-UHFFFAOYSA-N 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 125000002467 phosphate group Chemical group [H]OP(=O)(O[H])O[*] 0.000 description 1
- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical class N1C(N=C2C3=CC=CC=C3C(N=C3C4=CC=CC=C4C(=N4)N3)=N2)=C(C=CC=C2)C2=C1N=C1C2=CC=CC=C2C4=N1 IEQIEDJGQAUEQZ-UHFFFAOYSA-N 0.000 description 1
- 239000001007 phthalocyanine dye Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000009832 plasma treatment Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 150000004291 polyenes Chemical class 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 229920006290 polyethylene naphthalate film Polymers 0.000 description 1
- 229920000069 polyphenylene sulfide Polymers 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 229920001290 polyvinyl ester Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- FZYCEURIEDTWNS-UHFFFAOYSA-N prop-1-en-2-ylbenzene Chemical compound CC(=C)C1=CC=CC=C1.CC(=C)C1=CC=CC=C1 FZYCEURIEDTWNS-UHFFFAOYSA-N 0.000 description 1
- VEYCPJGKKJULEP-UHFFFAOYSA-N prop-2-enoic acid sulfuric acid Chemical compound OC(=O)C=C.OS(O)(=O)=O VEYCPJGKKJULEP-UHFFFAOYSA-N 0.000 description 1
- QLNJFJADRCOGBJ-UHFFFAOYSA-N propionamide Chemical compound CCC(N)=O QLNJFJADRCOGBJ-UHFFFAOYSA-N 0.000 description 1
- 229940080818 propionamide Drugs 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 1
- 238000007342 radical addition reaction Methods 0.000 description 1
- 238000010526 radical polymerization reaction Methods 0.000 description 1
- 239000002964 rayon Substances 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000005268 rod-like liquid crystal Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 238000004528 spin coating Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 125000004079 stearyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000001273 sulfonato group Chemical group [O-]S(*)(=O)=O 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 229960002447 thiram Drugs 0.000 description 1
- KUAZQDVKQLNFPE-UHFFFAOYSA-N thiram Chemical compound CN(C)C(=S)SSC(=S)N(C)C KUAZQDVKQLNFPE-UHFFFAOYSA-N 0.000 description 1
- 239000013008 thixotropic agent Substances 0.000 description 1
- 235000010215 titanium dioxide Nutrition 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 150000003918 triazines Chemical class 0.000 description 1
- WLOQLWBIJZDHET-UHFFFAOYSA-N triphenylsulfonium Chemical class C1=CC=CC=C1[S+](C=1C=CC=CC=1)C1=CC=CC=C1 WLOQLWBIJZDHET-UHFFFAOYSA-N 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
- PAPBSGBWRJIAAV-UHFFFAOYSA-N ε-Caprolactone Chemical compound O=C1CCCCCO1 PAPBSGBWRJIAAV-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3016—Polarising elements involving passive liquid crystal elements
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F22/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical and containing at least one other carboxyl radical in the molecule; Salts, anhydrides, esters, amides, imides or nitriles thereof
- C08F22/10—Esters
- C08F22/12—Esters of phenols or saturated alcohols
- C08F22/24—Esters containing sulfur
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F22/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical and containing at least one other carboxyl radical in the molecule; Salts, anhydrides, esters, amides, imides or nitriles thereof
- C08F22/10—Esters
- C08F22/26—Esters of unsaturated alcohols
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3083—Birefringent or phase retarding elements
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/13363—Birefringent elements, e.g. for optical compensation
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B33/00—Electroluminescent light sources
- H05B33/02—Details
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/868—Arrangements for polarized light emission
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/80—Constructional details
- H10K59/8791—Arrangements for improving contrast, e.g. preventing reflection of ambient light
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2335/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical, and containing at least one other carboxyl radical in the molecule, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Derivatives of such polymers
- C08J2335/02—Characterised by the use of homopolymers or copolymers of esters
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/02—Homopolymers or copolymers of acids; Metal or ammonium salts thereof
Definitions
- a quarter-wave plate composed of a single retardation plate has a wavelength that gives a quarter-wave phase difference limited to a specific wavelength. Therefore, as a reflection preventing filter for suppressing surface reflection of a display or the like. If used, sufficient anti-reflection performance cannot be obtained at wavelengths other than the vicinity of a specific wavelength that gives a quarter-wave phase difference, and the visibility of the display appears to be colored blue, purple, red, etc. It was a problem.
- Patent Documents 1 to 3 a phase difference ratio represented by a ratio Re (450) / Re (550) between a phase difference Re (450) at a wavelength of 450 nm and a phase difference Re (550) at a wavelength of 550 nm is used.
- a phase difference ratio represented by a ratio Re (450) / Re (550) between a phase difference Re (450) at a wavelength of 450 nm and a phase difference Re (550) at a wavelength of 550 nm is used.
- a phase difference ratio represented by a ratio Re (450) / Re (550) between a phase difference Re (450) at a wavelength of 450 nm and a phase difference Re (550) at a wavelength of 550 nm is used.
- two phase difference plates in which the phase difference ratio of one phase difference plate is 1.16 and the phase difference ratio of the other phase difference plate is 1.025 are laminated. It has been reported that good antireflection performance was obtained in the retardation plate. Further, according
- Patent Documents 1 to 3 use a stretched film in which the slow axis is fixed in the stretching direction, the retardation axis of the retardation plate and the transmission axis of the polarizing plate are crossed. In the process of laminating the phase difference plate and the polarizing plate, there is also a problem that a single wafer method having poor production efficiency has to be adopted.
- Patent Document 4 discloses a retardation plate using a compound having reverse wavelength dispersion characteristics, which is useful as a broadband retardation plate. However, this alone cannot compensate for obliquely incident light, and there is a problem that viewing angle characteristics deteriorate.
- Japanese Patent Laid-Open No. 10-68816 Japanese Patent Laid-Open No. 10-90521 Japanese Patent Laid-Open No. 11-52131 JP 2002-267838 A
- the problem to be solved by the present invention is to provide a retardation film that is excellent in antireflection function with a single film, and to provide a retardation film that maintains its function even after being exposed to a high temperature state. Furthermore, another object is to provide an elliptically polarizing plate and a display device using these retardation films.
- the present invention is a retardation film having a retardation layer, the optical film satisfies (Formula 1-1), Re (450) / Re (550) ⁇ 1 (Formula 1-1) (In the formula, Re (450) represents an in-plane phase difference at a wavelength of 450 nm, and Re (550) represents an in-plane phase difference at a wavelength of 550 nm.)
- the material for forming the retardation layer is a polymerizable composition containing a polymerizable liquid crystal compound selected from the group consisting of at least one of the general formulas (1) to (7), and the retardation layer is a hybrid
- a retardation film characterized by having a structure.
- Another object is to provide an elliptically polarizing plate, a display element, and an organic light emitting display element using the retardation phase difference film.
- the retardation film of the present invention has optical characteristics suitable for an antireflection function, surface reflection of various display devices can be suppressed, and excellent visibility can be obtained particularly when used for an organic EL display. In addition, since the characteristics and functions can be maintained even when exposed to high temperature conditions, it is optimal for display elements for outdoor use.
- the retardation film of the present invention is a retardation film exhibiting reverse wavelength dispersion characteristics and satisfies Formula 1-1.
- FIG. 1 is a conceptual diagram showing the orientation state and tilt angle of the hybrid structure of the present invention.
- FIG. 2 is also a conceptual diagram showing the orientation state and tilt angle of the hybrid structure of the present invention.
- FIG. 2 is a structure in which the substrate interface and the air interface are reversed.
- FIG. 3 is a conceptual diagram showing the case where the liquid crystal molecules in the polymerizable liquid crystal composition have a twist angle, and the twist angle, and shows an alignment state having a twisted structure in the substrate surface.
- the polymerizable composition used for the retardation film contains a polymerizable liquid crystal compound, and the polymerizable liquid crystal compound is selected from the group consisting of the general formulas (1) to (7).
- the “liquid crystalline compound” is intended to indicate a compound having a mesogenic skeleton, and the compound alone may not exhibit liquid crystallinity.
- polymerizable means that it can be polymerized (formed into a film) by carrying out a polymerization treatment by irradiation with light such as ultraviolet rays or heating.
- the compounds of the general formulas (1) to (7) are compounds that exhibit reverse wavelength dispersion characteristics when oriented.
- S 11 to S 72 represent a spacer group or a single bond, and when a plurality of S 11 to S 72 are present, they may be the same or different, X 11 to X 72 are —O—, —S—, —OCH 2 —, —CH 2 O—, —CO—, —COO—, —OCO—, —CO—S—, —S—CO—, — O—CO—O—, —CO—NH—, —NH—CO—, —SCH 2 —, —CH 2 S—, —CF 2 O—, —OCF 2 —, —CF 2 S—, —SCF 2 —, —CH ⁇ CH—COO—, —CH ⁇ CH—OCO—, —COO—CH ⁇ CH—, —OCO—CH ⁇ CH—, —COO—CH 2 CH 2 —, —OCO—CH 2 CH 2 —, —, —OCO—CH 2 CH 2 —, —,
- a 11 and A 12 are each independently 1,4-phenylene group, 1,4-cyclohexylene group, pyridine-2,5-diyl group, pyrimidine-2,5-diyl group, naphthalene-2,6-diyl.
- the groups may be unsubstituted or substituted by one or more L 1 s , but when a plurality of A 11 and / or A 12 appear, they may be the same or different, Z 11 and Z 12 are each independently —O—, —S—, —OCH 2 —, —CH 2 O—, —CH 2 CH 2 —, —CO—, —COO—, —OCO—, —CO.
- G is the following formula (G-1) to formula (G-6)
- R 3 represents a hydrogen atom or an alkyl group having 1 to 20 carbon atoms, and the alkyl group may be linear or branched, and any of the alkyl groups the hydrogen atoms may be substituted by a fluorine atom, one -CH 2 in the alkyl group - or nonadjacent two or more -CH 2 - are each independently -O -, - S- , —CO—, —COO—, —OCO—, —CO—S—, —S—CO—, —O—CO—O—, —CO—NH—, —NH—CO— or —C ⁇ C—.
- W 81 represents a group having 5 to 30 carbon atoms having at least one aromatic group, and the group may be unsubstituted or substituted by one or more L 1
- W 83 and W 84 each independently has 5 to 30 carbon atoms having a halogen atom, a cyano group, a hydroxy group, a nitro group, a carboxyl group, a carbamoyloxy group, an amino group, a sulfamoyl group, or at least one aromatic group.
- the above —CH 2 — is independently —O—, —S—, —CO—, —COO—, —OCO—, —CO—S—, —S—CO—, —O—CO—O—.
- G represents Formula (G-6);
- L 1 is a fluorine atom, chlorine atom, bromine atom, iodine atom, pentafluorosulfuranyl group, nitro group, isocyano group, amino group, hydroxyl group, mercapto group, methylamino group, dimethylamino group, diethylamino group, diisopropylamino.
- R 11 and R 31 are hydrogen atom, fluorine atom, chlorine atom, bromine atom, iodine atom, pentafluorosulfuranyl group, cyano group, nitro group, isocyano group, thioisocyano group, or carbon number of 1 to 20
- the alkyl group may be linear or branched, and any hydrogen atom in the alkyl group may be substituted with a fluorine atom.
- One —CH 2 — or two or more non-adjacent —CH 2 — are each independently —O—, —S—, —CO—, —COO—, —OCO—, —CO—S—.
- m11 represents an integer of 0 to 8; ⁇ M7, n2 ⁇ n7, l4 ⁇ 16, k6 are each independently 0 5 of an integer.
- the polymerizable groups P 11 to P 74 are represented by the following formulas (P-1) to (P-20).
- these polymerizable groups are polymerized by radical polymerization, radical addition polymerization, cationic polymerization and anionic polymerization.
- the formula (P-1), formula (P-2), formula (P-3), formula (P-4), formula (P-5), formula (P ⁇ 7), formula (P-11), formula (P-13), formula (P-15) or formula (P-18) are preferred, and formula (P-1), formula (P-2), formula (P-18) P-7), formula (P-11) or formula (P-13) is more preferred, formula (P-1), formula (P-2) or formula (P-3) is more preferred, and formula (P- Particular preference is given to 1) or formula (P-2).
- S 11 to S 72 represent a spacer group or a single bond. When a plurality of S 11 to S 72 are present, they may be the same or different. good.
- the spacer group one —CH 2 — or two or more non-adjacent —CH 2 — are each independently —O—, —COO—, —OCO—, —OCO—O—, —CO—NH—, —NH—CO—, —CH ⁇ CH—, —C ⁇ C— or the following formula (S-1)
- It preferably represents an alkylene group having 1 to 20 carbon atoms which may be replaced by
- a plurality of S may be the same or different, and each independently represents one —CH 2 — or not adjacent 2
- two or more —CH 2 — each independently represents an alkylene group having 1 to 10 carbon atoms or a single bond that may be independently replaced by —O—, —COO—, or —OCO—, each independently
- an alkylene group having 1 to 10 carbon atoms or a single bond and when there are a plurality of alkylene groups, they may be the same or different and each independently an alkylene group having 1 to 8 carbon atoms. Is particularly preferred.
- X 11 to X 72 are —O—, —S—, —OCH 2 —, —CH 2 O—, —CO—, —COO—, —OCO—, —CO—S—, —S—CO—, —O—CO—O—, —CO—NH—, —NH—CO—, —SCH 2 —, —CH 2 S—, —CF 2 O—, — OCF 2 —, —CF 2 S—, —SCF 2 —, —CH ⁇ CH—COO—, —CH ⁇ CH—OCO—, —COO—CH ⁇ CH—, —OCO—CH ⁇ CH—, —COO— CH 2 CH 2 —, —OCO—CH 2 CH 2 —, —CH 2 CH 2 —COO—, —CH 2 CH 2 —OCO—, —COO—CH 2 CH 2 —, —OCO—CH 2 CH 2 —, —CH 2 CH 2 —COO—
- X 11 to X 72 When a plurality of X 11 to X 72 are present, they may be the same or different (provided that the P— (S—X) — bond includes -O-O- is not included.) From the viewpoint of easy availability of raw materials and ease of synthesis, when there are a plurality of them, they may be the same or different, and each independently represents —O—, —S—, —OCH 2 —, —CH 2 O—, —COO—, —OCO—, —CO—S—, —S—CO—, —O—CO—O—, —CO—NH—, —NH—CO—, —COO—CH 2 CH 2 -, - OCO- CH 2 CH 2 -, - CH 2 CH 2 -COO -, - it is preferable to represent a CH 2 CH 2 -OCO- or a single bond, each independently -O -, - OCH 2 —, —CH 2 O—,
- a 11 and A 12 are each independently 1,4-phenylene group, 1,4-cyclohexylene group, pyridine-2,5-diyl group, pyrimidine-2. , 5-diyl group, naphthalene-2,6-diyl group, naphthalene-1,4-diyl group, tetrahydronaphthalene-2,6-diyl group, decahydronaphthalene-2,6-diyl group or 1,3-dioxane -2,5-diyl groups, these groups may be unsubstituted or substituted by one or more L, but when multiple occurrences of A 11 and / or A 12 appear, they are the same.
- a 11 and A 12 are each independently an unsubstituted or 1,4-phenylene group that may be substituted with one or more L 1 , 1,4-cyclohexane from the viewpoint of availability of raw materials and ease of synthesis.
- each group independently represents a group selected from formula (A-1) to formula (A-8), and each independently represents a group selected from formula (A-1). It is particularly preferable to represent a group selected from the formula (A-4).
- Z 11 and Z 12 are each independently —O—, —S—, —OCH 2 —, —CH 2 O—, —CH 2 CH 2 —, — CO—, —COO—, —OCO—, —CO—S—, —S—CO—, —O—CO—O—, —CO—NH—, —NH—CO—, —OCO—NH—, — NH—COO—, —NH—CO—NH—, —NH—O—, —O—NH—, —SCH 2 —, —CH 2 S—, —CF 2 O—, —OCF 2 —, —CF 2 S—, —SCF 2 —, —CH ⁇ CH—COO—, —CH ⁇ CH—OCO—, —COO—CH ⁇ CH—, —OCO—CH ⁇ CH—, —COO—CH 2 CH 2 —, — OCO—CH 2 CH 2 —, —,
- Z 11 and Z 12 are each independently a single bond, —OCH 2 —, —CH 2 O—, —COO—, —OCO— from the viewpoint of liquid crystallinity of the compound, availability of raw materials, and ease of synthesis.
- M is the following formula (M-1) to formula (M-11)
- M is each independently unsubstituted or substituted by one or more L 1 from the viewpoints of availability of raw materials and ease of synthesis, and the formula (M-1) or the formula (M-2) Alternatively, it preferably represents a group selected from unsubstituted formula (M-3) to (M-6), and may be unsubstituted or substituted by one or more L 1 . It is more preferable to represent a group selected from (M-2), and it is particularly preferable to represent a group selected from unsubstituted formula (M-1) or (M-2).
- R 11 and R 31 are hydrogen atom, fluorine atom, chlorine atom, bromine atom, iodine atom, pentafluorosulfuranyl group, cyano group, nitro group, isocyano group, A thioisocyano group, or one —CH 2 — or two or more non-adjacent —CH 2 — are each independently —O—, —S—, —CO—, —COO—, —OCO—, 1 to 20 carbon atoms which may be substituted by —CO—S—, —S—CO—, —O—CO—O—, —CO—NH—, —NH—CO— or —C ⁇ C—.
- a linear or branched alkyl group is represented, and any hydrogen atom in the alkyl group may be substituted with a fluorine atom.
- R 1 is a hydrogen atom in view of easiness of the liquid crystal and synthetic, fluorine atom, chlorine atom, cyano group, or one -CH 2 - or nonadjacent two or more -CH 2 - are each independently It preferably represents a linear or branched alkyl group having 1 to 12 carbon atoms which may be substituted by —O—, —COO—, —OCO—, —O—CO—O—, a hydrogen atom, fluorine It is more preferable to represent an atom, a chlorine atom, a cyano group, or a linear alkyl group or linear alkoxy group having 1 to 12 carbon atoms, and a linear alkyl group or linear alkoxy group having 1 to 12 carbon atoms. It is particularly preferred to represent.
- G represents a group selected from the formulas (G-1) to (G-6).
- R 3 represents a hydrogen atom or an alkyl group having 1 to 20 carbon atoms, and the alkyl group may be linear or branched.
- hydrogen atom may be substituted by a fluorine atom, one -CH 2 in the alkyl group - or nonadjacent two or more -CH 2 - are each independently -O -, - S-, By —CO—, —COO—, —OCO—, —CO—S—, —S—CO—, —O—CO—O—, —CO—NH—, —NH—CO— or —C ⁇ C—.
- W 81 represents a group having 5 to 30 carbon atoms having at least one aromatic group, and the group may be unsubstituted or substituted by one or more L 1
- W 82 represents a hydrogen atom or an alkyl group having 1 to 20 carbon atoms, and the alkyl group may be linear or branched, and any hydrogen atom in the alkyl group may be substituted by fluorine atoms, one -CH 2 in the alkyl group - or nonadjacent two or more -CH 2 - are each independently -O -, - S -, - CO —, —COO—, —OCO—, —CO—S—, —S—CO—, —O—CO—O—, —CO—NH—, —NH—CO—, —CH ⁇ CH—COO—, May be substituted by —CH ⁇ CH—OCO—, —COO—CH ⁇ CH—, —OCO—CH ⁇ CH—, —CH
- the aromatic group contained in W 81 may be an aromatic hydrocarbon group or aromatic heterocyclic group may contain both. These aromatic groups may be bonded via a single bond or a linking group (—OCO—, —COO—, —CO—, —O—), and may form a condensed ring. W 81 may contain an acyclic structure and / or a cyclic structure other than the aromatic group in addition to the aromatic group. From the viewpoint of availability of raw materials and ease of synthesis, the aromatic group contained in W 81 is unsubstituted or may be substituted with one or more L 1 from the following formula (W-1) Formula (W-19)
- Q 1 Represents —O—, —S—, —NR 4 — (wherein R 4 represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms) or —CO—.
- Each —CH ⁇ may be independently replaced by —N ⁇ , and each —CH 2 — independently represents —O—, —S—, —NR 4 — (wherein R 4 represents a hydrogen atom or carbon Represents an alkyl group having 1 to 8 atoms.) Or may be replaced by —CO—, but does not include an —O—O— bond, and the group represented by the formula (W-1) is unsubstituted. Or the following formula (W-1-1) to formula (W-1-8) which may be substituted by one or more L 1
- these groups may have a bond at an arbitrary position), preferably a group selected from the group represented by the formula (W-7) is unsubstituted. Or the following formula (W-7-1) to formula (W-7-7) which may be substituted by one or more L 1
- these groups may have a bond at an arbitrary position), preferably a group selected from the group represented by formula (W-10) is unsubstituted. Or one or more of L 1 may be substituted by the following formulas (W-10-1) to (W-10-8)
- these groups may have a bond at an arbitrary position, and R 6 represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms).
- R 6 represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms.
- these groups may have a bond at an arbitrary position, and R 6 represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms).
- R 6 represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms.
- Examples of the group represented by the formula (W-12) include the following formula (W-12-1) to formula (W-12-19) which may be unsubstituted or substituted with one or more L 1 groups. )
- R 6 represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, each identical if R 6 there are a plurality of It is preferable that the group represented by the formula (W-13) is unsubstituted or substituted by one or more L 1 groups.
- R 6 represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, each identical if R 6 there are a plurality of It is preferable that the group represented by the formula (W-14) is unsubstituted or substituted by one or more L 1 groups.
- these groups may have a bond at an arbitrary position, and R 6 represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms).
- the group represented by the formula (W-15) may be unsubstituted or substituted with one or more L 1 from the following formulas (W-15-1) to (W-15-18) )
- these groups may have a bond at an arbitrary position, and R 6 represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms).
- R 6 represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms.
- these groups may have a bond at an arbitrary position, and R 6 represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms).
- R 6 represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms.
- these groups may have a bond at an arbitrary position, and R 6 represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms).
- R 6 represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms.
- Examples of the group represented by the formula (W-18) include the following formulas (W-18-1) to (W-18-6) which may be unsubstituted or substituted with one or more L 1 groups.
- R 6 represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, each identical if R 6 there are a plurality of It is preferable that the group represented by the formula (W-19) is unsubstituted or substituted with one or more L 1 groups.
- R 6 represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, each identical if R 6 there are a plurality of Or may be different. It is preferable to represent a group selected from:
- the aromatic group contained in W 81 is unsubstituted or may be substituted by one or more L 1.
- r represents an integer of 0 to 5
- s represents an integer of 0 to 4
- t represents an integer of 0 to 3.
- W 82 may be a hydrogen atom, or any hydrogen atom in the group may be substituted with a fluorine atom and / or —OH, and one —CH 2 Or two or more non-adjacent —CH 2 — are each independently —O—, —CO—, —COO—, —OCO—, —O—CO—O—, —CH ⁇ CH—COO— , —CH ⁇ CH—OCO—, —COO—CH ⁇ CH—, —OCO—CH ⁇ CH—, —CH ⁇ CH—, —CF ⁇ CF—, or carbon atom optionally substituted by —C ⁇ C— More preferably, it represents a linear or branched alkyl group of 1 to 20 or a group represented by P 8 — (S 8 —X 8 ) j —, and W 82 represents a hydrogen atom or a group Any hydrogen atom may be replaced by a fluorine atom, one
- Each of —CH 2 — is independently a linear alkyl group having 1 to 12 carbon atoms which may be substituted with —O—, or represented by P 8 — (S 8 —X 8 ) j — It is even more preferred that W 82 represents a hydrogen atom or one —CH 2 — or two or more non-adjacent —CH 2 —, each independently substituted by —O—.
- W 82 represents a group having 2 to 30 carbon atoms having at least one aromatic group
- W 82 represents a group selected from the above formulas (W-1) to (W-18) Is preferred. In that case, the more preferable structure is the same as described above.
- W 82 represents a group represented by P 8 — (S 8 —X 8 ) j —
- preferred structures of the groups represented by P 8 , S 8 , X 8 are the above-mentioned P 11 To P 74 , S 11 to S 72 , and the preferred structures of the groups represented by X 11 to X 72 are the same.
- j is preferably an integer of 0 to 3, more preferably 0 or 1.
- terminal groups of the W 82 may be in the OH groups.
- the cyclic group represented by —NW 81 W 82 may be unsubstituted or substituted with one or more L 1 Formula (Wb-1) to Formula (Wb-42)
- R 6 represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms
- R 6 represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms
- R 6 represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms
- Wb-20 Formula (Wb-21), Formula (Wb-22), Formula (Wb-23), Formula (Wb) that may be substituted by one or more L 1
- CW 81 W 82 may be unsubstituted or may be substituted with one or more L 1.
- R 6 represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, and when there are a plurality of R 6 s , they may be the same or different from each other).
- R 6 represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, and when there are a plurality of R 6 s , they may be the same or different from each other.
- Formula (Wc-11), Formula (Wc-12), which may be unsubstituted or substituted by one or more L, Formula (Wc-13), Formula (Wc-14), Formula (Wc-53), Formula (Wc-54), Formula (Wc-55), Formula (Wc -56), a group selected from formula (Wc-57) or formula (Wc-78) is particularly preferred.
- the total number of ⁇ electrons contained in W 81 and W 82 is preferably 4 to 24 from the viewpoint of wavelength dispersion characteristics, storage stability, liquid crystallinity, and ease of synthesis.
- W 83 and W 84 each independently has 5 to 30 carbon atoms having a halogen atom, a cyano group, a hydroxy group, a nitro group, a carboxyl group, a carbamoyloxy group, an amino group, a sulfamoyl group, or at least one aromatic group.
- alkyl groups having 1 to 20 carbon atoms alkyl groups having 1 to 20 carbon atoms, cycloalkyl groups having 3 to 20 carbon atoms, alkenyl groups having 2 to 20 carbon atoms, cycloalkenyl groups having 3 to 20 carbon atoms, and 1 to 20 carbon atoms.
- a cyano group, a carboxyl group, one —CH 2 — or two or more non-adjacent —C H 2 — is each independently substituted by —CO—, —COO—, —OCO—, —O—CO—O—, —CO—NH—, —NH—CO— or —C ⁇ C—
- W84 is a cyano group, a nitro group, a carboxyl group, one —CH 2 — or adjacent group.
- Two or more —CH 2 — that are not present are each independently —O—, —S—, —CO—, —COO—, —OCO—, —CO—S—, —S—CO—, —O.
- L 1 is a fluorine atom, chlorine atom, bromine atom, iodine atom, pentafluorosulfuranyl group, nitro group, isocyano group, amino group, hydroxyl group, mercapto group, methylamino group, dimethylamino group, diethylamino group, diisopropylamino.
- L 1 represents a fluorine atom, a chlorine atom, a pentafluorosulfuranyl group, a nitro group, a methylamino group, a dimethylamino group, a diethylamino group, a diisopropylamino group, or an arbitrary hydrogen.
- the atom may be substituted with a fluorine atom, and one —CH 2 — or two or more non-adjacent —CH 2 — are each independently —O—, —S—, —CO—, —COO.
- each substituent bonded to MG 11 to MG 71 is bonded to A 11 and / or A 12 of the general formula (a).
- m11 represents an integer of 0 to 8, and preferably represents an integer of 0 to 4 from the viewpoint of liquid crystallinity, availability of raw materials and ease of synthesis, and an integer of 0 to 2 Is more preferable, 0 or 1 is more preferable, and 1 is particularly preferable.
- m2 to m7, n2 to n7, l4 to l6, and k6 each independently represent an integer of 0 to 5, but liquid crystallinity, availability of raw materials, and synthesis From the viewpoint of ease, it is preferable to represent an integer of 0 to 4, more preferably an integer of 0 to 2, more preferably 0 or 1, and particularly preferably 1.
- j11 and j12 each independently represent an integer of 1 to 5, but j11 + j12 represents an integer of 2 to 5. From the viewpoints of liquid crystallinity, ease of synthesis, and storage stability, j11 and j12 each independently preferably represent an integer of 1 to 4, more preferably an integer of 1 to 3, more preferably 1 or 2. It is particularly preferred to represent. j11 + j12 preferably represents an integer of 2 to 4.
- the compound represented by the general formula (1) is preferably a compound represented by the following formula (1-a-1) to formula (1-a-93).
- liquid crystalline compounds can be used alone or in combination of two or more.
- compounds represented by the following formulas (2-a-1) to (2-a-68) are preferable.
- n represents an integer of 1 to 10.
- the polymerizable liquid crystal compound represented by the general formula (2-a) may be contained as a material for forming the retardation layer.
- the total amount of the polymerizable liquid crystal compounds contained in the material forming the retardation layer is preferably 5 to 100% by mass, more preferably 10 to 100% by mass, and more preferably 15 to It is particularly preferable to contain 100% by mass.
- liquid crystalline compounds can be used alone or in combination of two or more.
- the compound represented by the general formula (4) is preferably a compound represented by the following formula (4-a-1) to (4-a-26).
- liquid crystalline compounds can be used alone or in combination of two or more.
- the compound represented by the general formula (5) is preferably a compound represented by the following formula (5-a-1) to formula (5-a-29).
- n 1 to 10 carbon atoms.
- the compound represented by the general formula (6) is preferably a compound represented by the following formula (6-a-1) to formula (6-a-25)
- liquid crystalline compounds can be used alone or in combination of two or more.
- the compound represented by the general formula (7) is preferably a compound represented by the following formula (7-a-1) to formula (7-a-26).
- liquid crystalline compounds can be used alone or in combination of two or more.
- the total content of the liquid crystal compound having one or more polymerizable groups is preferably 60 to 100% by mass, and preferably 65 to 98% by mass, based on the total amount of the liquid crystal compound used in the polymerizable composition. More preferably, the content is 70 to 95% by mass.
- the compounds represented by the general formulas (1) to (7) having the reverse wavelength dispersion characteristic are compounds having a “T-shaped” structure, but other compounds exhibiting the reverse wavelength dispersion are “ Although a “cross” structure or an “H” structure is considered, a compound of the “H” structure is essentially inferior in heat resistance, and the compound of the “cross” structure has two polymerizable functional groups. Since it is difficult to obtain a polymer having a high crosslinking density due to the steric hindrance of the compound structure, the heat resistance is inferior.
- a composition containing a compound having two or more polymerizable functional groups is preferable, and the number of polymerizable functional groups is It is more preferable to contain three or more compounds.
- a composition containing the compound of the general formula (1) or (2) is preferable.
- W 82 is P 8 - (S 8 -X 8 ) j - group represented by (P 8, S 8, X 8, And a compound having the same meaning as described above is more preferable.
- the polymerizable composition used for producing the retardation film of the present invention includes a liquid crystalline compound having one or more polymerizable groups. Can be contained. Examples of such a liquid crystal compound include liquid crystal compounds of general formula (1-b) to general formula (7-b).
- Equation 1-1) exceeds 1 when the addition amount is too large, when added, it is 30% by mass or less with respect to the total amount of the polymerizable compounds used in the polymerizable composition. Preferably, it is 20 mass% or less, more preferably 10 mass% or less.
- X 11 to X 72 may be different from each other, and X 11 to X 72 are —O—, —S—, —OCH 2 —, —CH 2 O—, —CO—, —COO—, —OCO—, —CO—S—, — S—CO—, —O—CO—O—, —CO—NH—, —NH—CO—, —SCH 2 —, —CH 2 S—, —CF 2 O—, —OCF 2 —, —CF 2 S—, —SCF 2 —, —CH ⁇ CH—COO—, —CH ⁇ CH—OCO—, —COO—CH ⁇ CH—, —OCO—CH ⁇ CH—, —COO—CH 2 CH 2 —,
- MG 11 to MG 71 each independently represents the formula (b);
- a 83 and A 84 are each independently 1,4-phenylene group, 1,4-cyclohexylene group, pyridine-2,5-diyl group, pyrimidine-2,5-diyl group, naphthalene-2.
- Z 83 and Z 84 are each independently —O—, —S—, —OCH 2 —, —CH 2 O—, —CH 2 CH 2 —, —CO—, —COO—, —OCO—, —CO.
- L 2 is fluorine atom, chlorine atom, bromine atom, iodine atom, pentafluorosulfuranyl group, nitro group, isocyano group, amino group, hydroxyl group, mercapto group, methylamino group, dimethylamino group, diethylamino group, diisopropylamino.
- L 2 when a plurality of L 2 are present in the compound, they may be the same or different, m represents an integer of 0 to 8, and j83 and j84 each independently represents an integer of 0 to 5. J83 + j84 represents an integer of 1 to 5.
- R 11 and R 31 are hydrogen atom, fluorine atom, chlorine atom, bromine atom, iodine atom, pentafluorosulfuranyl group, cyano group, nitro group, isocyano group, thioisocyano group, or carbon number of 1 to 20
- the alkyl group may be linear or branched, and any hydrogen atom in the alkyl group may be substituted with a fluorine atom.
- One —CH 2 — or two or more non-adjacent —CH 2 — are each independently —O—, —S—, —CO—, —COO—, —OCO—, —CO—S—.
- m11 represents an integer of 0 to 8; ⁇ M7, n2 ⁇ n7, l4 ⁇ 16, k6 are each independently 0 5 of an integer.
- general formula (7) is excluded from general formula (1).
- Specific examples of the compound represented by the general formula (1-b) include compounds represented by the following formulas (1-b-1) to (1-b-39).
- R 111 and R 112 each independently represents a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, or a fluorine atom.
- R 113 is a hydrogen atom, fluorine atom, chlorine atom, bromine atom, iodine atom, pentafluorosulfuranyl group, cyano group, nitro group, isocyano group, thioisocyano group, or one —CH 2 — or adjacent Two or more —CH 2 — are each independently —O—, —S—, —CO—, —COO—, —OCO—, —CO—S—, —S—CO—, —O—.
- These liquid crystal compounds can be used alone or in combination of two or more.
- Specific examples of the compound represented by the general formula (2-b) include compounds represented by the following formulas (2-b-1) to (2-b-34).
- m and n each independently represents an integer of 1 to 18, and R represents a hydrogen atom, a halogen atom, an alkyl group having 1 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, or a cyano group.
- R represents a hydrogen atom, a halogen atom, an alkyl group having 1 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, or a cyano group.
- these groups are alkyl groups having 1 to 6 carbon atoms or alkoxy groups having 1 to 6 carbon atoms, they may be all unsubstituted or substituted with one or more halogen atoms.
- These liquid crystal compounds can be used alone or in combination of two or more.
- Specific examples of the compound represented by the general formula (3-b) include compounds represented by the following formulas (3-b-1) to (3-b-16).
- liquid crystalline compounds can be used alone or in combination of two or more.
- Specific examples of the compound represented by the general formula (4-b) include compounds represented by the following formulas (4-b-1) to (4-b-29).
- R represents a hydrogen atom, a halogen atom, an alkyl group having 1 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, or a cyano group.
- these groups are alkyl groups having 1 to 6 carbon atoms or alkoxy groups having 1 to 6 carbon atoms, they may be all unsubstituted or substituted with one or more halogen atoms.
- These liquid crystalline compounds can be used alone or in combination of two or more.
- Specific examples of the compound represented by the general formula (5-b) include compounds represented by the following formulas (5-b-1) to (5-b-26).
- each n independently represents an integer of 1 to 10.
- R represents a hydrogen atom, a halogen atom, an alkyl group having 1 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, or a cyano group.
- the group is an alkyl group having 1 to 6 carbon atoms or an alkoxy group having 1 to 6 carbon atoms, all of them may be unsubstituted or may be substituted with one or more halogen atoms.
- These liquid crystalline compounds can be used alone or in combination of two or more.
- Specific examples of the compound represented by the general formula (6-b) include compounds represented by the following formulas (6-b-1) to (6-b-23).
- R represents a hydrogen atom, a halogen atom, an alkyl group having 1 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, In the case where these groups are alkyl groups having 1 to 6 carbon atoms or alkoxy groups having 1 to 6 carbon atoms, they are all unsubstituted or substituted by one or more halogen atoms. May be.
- These liquid crystalline compounds can be used alone or in combination of two or more.
- Specific examples of the compound represented by the general formula (7-b) include compounds represented by the following formulas (7-b-1) to (7-b-25).
- R represents a hydrogen atom, a halogen atom, an alkyl group having 1 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, or a cyano group. These groups are alkyl groups having 1 to 6 carbon atoms, or carbon atoms. In the case of the alkoxy groups of 1 to 6, all may be unsubstituted, or may be substituted by one or more halogen atoms.) These liquid crystalline compounds may be used alone. It can also be used in combination of two or more.
- the polymerizable composition used for producing the retardation film of the present invention may contain a chiral compound for the purpose of obtaining a chiral nematic phase.
- the chiral compound itself does not need to exhibit liquid crystallinity, and may or may not have a polymerizable group.
- the direction of the spiral of the chiral compound can be appropriately selected depending on the intended use of the polymer.
- the chiral compound having a polymerizable group is not particularly limited and known and conventional compounds can be used, but a chiral compound having a large helical twisting power (HTP) is preferred.
- the polymerizable group is preferably a vinyl group, a vinyloxy group, an allyl group, an allyloxy group, an acryloyloxy group, a methacryloyloxy group, a glycidyl group, or an oxetanyl group, and particularly preferably an acryloyloxy group, a glycidyl group, or an oxetanyl group.
- the compounding amount of the chiral compound needs to be appropriately adjusted depending on the helical induction force of the compound, but it is contained in an amount of 0.1 to 5.0% by mass based on the total amount of the liquid crystal compound having a polymerizable group and the chiral compound.
- the content is preferably 0.2 to 3.0% by mass, more preferably 0.5 to 2.0% by mass.
- chiral compound examples include compounds represented by the following general formulas (10-1) to (10-4), but are not limited to the following general formulas.
- Sp 5a and Sp 5b each independently represent an alkylene group having 0 to 18 carbon atoms, and the alkylene group is a carbon atom having one or more halogen atoms, CN groups, or polymerizable functional groups.
- A5 and A6 are each independently 1,4-phenylene group, 1,4-cyclohexylene group, 1,4-cyclohexenyl group, tetrahydropyran-2,5-diyl group, 1,3-dioxane-2,5-diyl group, tetrahydrothiopyran-2,5-diyl group, 1,4-bicyclo (2,2,2) octylene group, decahydronaphthalene-2,6-diyl
- R 5a and R 5b represent a hydrogen atom, a halogen atom, a cyano group, or an alkyl group having 1 to 18 carbon atoms, and the alkyl group may be substituted with one or more halogen atoms or CN.
- R 5a and R 5b are represented by the general formula (10-a)
- P 5a represents a polymerizable functional group
- Sp 5a represents the same meaning as Sp 1
- P 5a represents a substituent selected from the polymerizable groups represented by the following formulas (P-1) to (P-20).
- chiral compound examples include compounds represented by the following general formulas (10-5) to (10-35).
- n and n each independently represents an integer of 1 to 10
- R represents a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, or a fluorine atom. These may be the same or different.
- chiral compound having no polymerizable group examples include, for example, pelargonic acid cholesterol having a cholesteryl group as a chiral group, cholesterol stearate, and a product of BDH having a 2-methylbutyl group as a chiral group.
- the value (d / P) obtained by dividing the thickness (d) of the obtained polymer by the helical pitch (P) in the polymer is It is preferable to add an amount in the range of 0.1 to 100, and an amount in the range of 0.1 to 20 is more preferable.
- the polymerizable composition used for producing the retardation film of the present invention can contain an initiator as necessary.
- the polymerization initiator used in the polymerizable composition is used for polymerizing the polymerizable composition used in the present invention.
- the photopolymerization initiator used when the polymerization is carried out by light irradiation is not particularly limited, and known and conventional ones can be used as long as they do not hinder the orientation state of the polymerizable compound in the polymerizable composition.
- a photoacid generator can be used as the photocationic initiator.
- the photoacid generator include diazodisulfone compounds, triphenylsulfonium compounds, phenylsulfone compounds, sulfonylpyridine compounds, triazine compounds, and diphenyliodonium compounds.
- the content of the photopolymerization initiator is preferably from 0.1 to 10% by mass, particularly preferably from 1 to 6% by mass, based on the total amount of the polymerizable compounds contained in the polymerizable composition. These can be used alone or in combination of two or more.
- thermal polymerization initiator used in the thermal polymerization known ones can be used.
- methyl acetoacetate peroxide cumene hydroperoxide, benzoyl peroxide, bis (4-t-butylcyclohexyl) Peroxydicarbonate, t-butylperoxybenzoate, methyl ethyl ketone peroxide, 1,1-bis (t-hexylperoxy) 3,3,5-trimethylcyclohexane, p-pentahydroperoxide, t-butylhydro
- Organic peroxides such as peroxide, dicumyl peroxide, isobutyl peroxide, di (3-methyl-3-methoxybutyl) peroxydicarbonate, 1,1-bis (t-butylperoxy) cyclohexane, 2'-azobisisobutyronitrile, Azonitrile compounds such as 2,2′-azobis (2,4-dimethylvaleronitrile),
- the content of the thermal polymerization initiator is preferably 0.1 to 10% by mass, particularly preferably 1 to 6% by mass. These can be used alone or in combination of two or more.
- the polymerizable composition for producing the retardation film of the present invention can contain a polymerization inhibitor. When the polymerizable composition is stored at a high temperature as the polymerizable composition by using the polymerization inhibitor, unnecessary polymerization can be suppressed and storage stability can be ensured. Moreover, when it is set as a phase difference film, since heat resistance can be provided to a coating film, durability can fully be ensured.
- the polymerization inhibitor is preferably a phenol polymerization inhibitor.
- phenol polymerization inhibitor hydroquinone, methoxyphenol, methyl hydroquinone, tertiary butyl hydroquinone, or tertiary butyl catechol is preferable.
- the content of the polymerization inhibitor is preferably from 0.01 to 1% by mass, particularly preferably from 0.01 to 0.5% by mass, based on the total amount of the polymerizable compounds contained in the polymerizable composition. These can be used alone or in combination of two or more.
- a general-purpose additive can also be used in the polymerizable composition used for preparing the retardation film of the present invention according to each purpose.
- antioxidants ultraviolet absorbers, leveling agents, alignment control agents, chain transfer agents, infrared absorbers, thixotropic agents, antistatic agents, dyes, fillers, chiral compounds, non-liquid crystalline compounds having a polymerizable group, etc.
- Additives such as liquid crystal compounds and alignment materials can be added to such an extent that the alignment of the liquid crystal is not significantly reduced.
- the polymerizable composition used for producing the retardation film of the present invention may contain an antioxidant or the like as necessary. Examples of such compounds include hydroquinone derivatives, nitrosamine polymerization inhibitors, hindered phenol antioxidants, and more specifically, tert-butyl hydroquinone, “Q-1300” manufactured by Wako Pure Chemical Industries, Ltd.
- the addition amount of the antioxidant is preferably 0.01 to 2.0% by mass, and preferably 0.05 to 1.0% by mass with respect to the total amount of the polymerizable compounds contained in the polymerizable composition. Is more preferable.
- the polymerizable composition used for producing the retardation film of the present invention may contain an ultraviolet absorber or a light stabilizer as necessary. Although the ultraviolet absorber and light stabilizer to be used are not particularly limited, those that improve the light resistance of the retardation film are preferable.
- UV absorber examples include 2- (2-hydroxy-5-t-butylphenyl) -2H-benzotriazole “Tinuvin PS”, “Tinuvin 99-2”, “Tinuvin 109”, “TINUVIN 213”, “TINUVIN 234”, “TINUVIN 326”, “TINUVIN 328”, “TINUVIN 329”, “TINUVIN 384-2”, “TINUVIN 571”, 2- (2H-benzotriazol-2-yl) -4,6-bis (1-Methyl-1-phenylethyl) phenol “TINUVIN 900”, 2- (2H-benzotriazol-2-yl) -6- (1-methyl-1-phenylethyl) -4- (1,1,3 , 3-tetramethylbutyl) phenol “TINUVIN 928”, TINUVIN 1130, TINUVIN 400, TINUVIN 405, 2,4-bis [2-hydroxy-4-butoxyphenyl] -6- (2,4-dibutoxyphenyl) -1
- Examples of the light stabilizer include “TINUVIN 111FDL”, “TINUVIN 123”, “TINUVIN 144”, “TINUVIN 152”, “TINUVIN 292”, “TINUVIN 622”, “TINUVIN 770”, “TINUVIN 765”, “TINUVIN 780”.
- the polymerizable composition for producing the retardation film of the present invention may contain a leveling agent as necessary.
- a leveling agent is preferably used in order to reduce film thickness unevenness when forming a thin film of a retardation film.
- the leveling agent include alkyl carboxylates, alkyl phosphates, alkyl sulfonates, fluoroalkyl carboxylates, fluoroalkyl phosphates, fluoroalkyl sulfonates, polyoxyethylene derivatives, fluoroalkylethylene oxide derivatives, polyethylene Examples include glycol derivatives, alkyl ammonium salts, and fluoroalkyl ammonium salts.
- the addition amount of the leveling agent is preferably 0.01 to 2% by mass, more preferably 0.05 to 0.5% by mass, based on the total amount of polymerizable compounds used in the polymerizable composition. preferable.
- the tilt angle at the air interface can be controlled by appropriately selecting the type and amount of the leveling agent.
- the polymerizable composition used for producing the retardation film of the present invention can contain an alignment controller in order to control the alignment state of the polymerizable compound.
- the alignment control agent to be used include those in which the liquid crystalline compound is substantially horizontally aligned, substantially vertically aligned, or substantially hybridly aligned with respect to the substrate.
- a chiral compound when a chiral compound is added, those which are substantially planarly oriented can be mentioned. As described above, horizontal alignment and planar alignment may be induced by the surfactant, but there is no particular limitation as long as each alignment state is induced, and a known and conventional one should be used. Can do.
- an orientation control agent for example, a weight average molecular weight having a repeating unit represented by the following general formula (8) having an effect of effectively reducing the tilt angle of the air interface when a retardation film is formed.
- the compound which is 100 or more and 1000000 or less is mentioned.
- R 11 , R 12 , R 13 and R 14 each independently represents a hydrogen atom, a halogen atom or a hydrocarbon group having 1 to 20 carbon atoms, and one hydrocarbon atom in the hydrocarbon group
- R 11 , R 12 , R 13 and R 14 each independently represents a hydrogen atom, a halogen atom or a hydrocarbon group having 1 to 20 carbon atoms, and one hydrocarbon atom in the hydrocarbon group
- R 11 , R 12 , R 13 and R 14 each independently represents a hydrogen atom, a halogen atom or a hydrocarbon group having 1 to 20 carbon atoms, and one hydrocarbon atom in the hydrocarbon group
- a rod-like liquid crystal compound modified with a fluoroalkyl group a discotic liquid crystal compound, a polymerizable compound containing a long-chain aliphatic alkyl group which may have a branched structure, and the like are also included.
- the polymerizable composition used in the present invention can contain a chain transfer agent in order to further improve the adhesion between the polymer or retardation film and the substrate.
- Chain transfer agents include aromatic hydrocarbons, halogenated hydrocarbons such as chloroform, carbon tetrachloride, carbon tetrabromide, bromotrichloromethane, Mercaptan compounds such as octyl mercaptan, n-butyl mercaptan, n-pentyl mercaptan, n-hexadecyl mercaptan, n-tetradecyl merc, n-dodecyl mercaptan, t-tetradecyl mercaptan, t-dodecyl mercaptan, hexanedithiol, decandithiol 1,4-butanediol bisthiopropionate, 1,4-butanediol bisthioglycolate, ethylene glycol bisthioglycolate, ethylene glycol bisthiopropionate, trimethylolpropane tristhiogly
- R 95 represents an alkyl group having 2 to 18 carbon atoms, and the alkyl group may be linear or branched, and one or more methylene groups in the alkyl group are oxygen atoms.
- a sulfur atom that is not directly bonded to each other may be substituted with an oxygen atom, a sulfur atom, —CO—, —OCO—, —COO—, or —CH ⁇ CH—
- R 96 is a carbon atom Represents an alkylene group of 2 to 18, and one or more methylene groups in the alkylene group are oxygen atoms, sulfur atoms, —CO—, —OCO—, wherein oxygen atoms and sulfur atoms are not directly bonded to each other.
- —COO—, or —CH ⁇ CH— may be substituted.
- the chain transfer agent is preferably added in a step of preparing a polymerizable solution by mixing a polymerizable compound in an organic solvent and heating and stirring, but it is added in a step of mixing a polymerization initiator in the subsequent polymerizable solution. It may be added in both steps.
- the addition amount of the chain transfer agent is preferably 0.5 to 10% by mass, and preferably 1.0 to 5.0% by mass, based on the total amount of polymerizable compounds contained in the polymerizable composition. More preferred.
- liquid crystal compounds that are not polymerizable can be added as necessary to adjust the physical properties.
- a polymerizable compound having no liquid crystallinity is preferably added in the step of preparing a polymerizable solution by mixing the polymerizable compound with an organic solvent and stirring under heating. You may add in the process of mixing a polymerization initiator with a solution, and may add in both processes. The amount of these compounds added is preferably 20% by mass or less, more preferably 10% by mass or less, and still more preferably 5% by mass or less, based on the polymerizable composition.
- the polymerizable composition used for producing the retardation film of the present invention may contain an infrared absorber as necessary.
- the infrared absorber to be used is not particularly limited, and any known and conventional one can be contained within a range not disturbing the orientation.
- Examples of the infrared absorber include cyanine compounds, phthalocyanine compounds, naphthoquinone compounds, dithiol compounds, diimmonium compounds, azo compounds, and aluminum salts.
- the polymerizable composition used for producing the retardation film of the present invention may contain an antistatic agent as necessary.
- the antistatic agent to be used is not particularly limited, and a known and commonly used antistatic agent can be contained as long as the orientation is not disturbed.
- an antistatic agent examples include a polymer compound having at least one sulfonate group or phosphate group in the molecule, a compound having a quaternary ammonium salt, a surfactant having a polymerizable group, and the like.
- surfactants having a polymerizable group are preferred.
- anionic surfactants such as “Antox SAD” and “Antox MS-2N” Made by company), “AQUALON KH-05”, “AQUALON KH-10”, “AQUALON KH-20”, “AQUALON KH-0530”, “AQUALON KH-1025” (above, manufactured by Daiichi Kogyo Seiyaku Co., Ltd.), Alkyl ethers such as “ADEKA rear soap SR-10N”, “ADEKA rear soap SR-20N” (manufactured by ADEKA Corporation), “Latemul PD-104” (manufactured by Kao Corporation), etc., “Latemuru S-120” “Latemul S-120A”, “Latemul S-180P”, “Latemul S-180A” (manufactured by Kao Corporation), “Eleminor” S-2 "(manufactureured by Kao Corporation), “Eleminor” S-2 "(
- nonionic surfactants having a polymerizable group include, for example, “Antox LMA-20”, “Antox LMA-27”, “Antox EMH-20”, “Antox LMH— 20, “Antox SMH-20” (manufactured by Nippon Emulsifier Co., Ltd.), “Adekalia Soap ER-10”, “Adekalia Soap ER-20”, “Adekalia Soap ER-30”, “Adekalia Soap” ER-40 "(above, manufactured by ADEKA Corporation),” Latemul PD-420 “,” Latemuru PD-430 “,” Latemuru PD-450 “(above, manufactured by Kao Corporation), etc.
- RN-10 Aqualon RN-20, Aqualon RN-30, Aqualon RN-50, Aqualon RN-2025 ( (Daiichi Kogyo Seiyaku Co., Ltd.), “Adekalia Soap NE-10”, “Adekalia Soap NE-20”, “Adekalia Soap NE-30”, “Adekalia Soap NE-40” (Meth) acrylate sulfuric acid such as alkylphenyl ether type or alkylphenyl ester type such as “RMA-564”, “RMA-568”, “RMA-1114” (above, manufactured by Nippon Emulsifier Co., Ltd.) An ester type is mentioned.
- antistatic agents examples include polyethylene glycol (meth) acrylate, methoxypolyethylene glycol (meth) acrylate, ethoxypolyethylene glycol (meth) acrylate, propoxypolyethylene glycol (meth) acrylate, and n-butoxypolyethylene glycol (meth) acrylate.
- the antistatic agent can be used alone or in combination of two or more.
- the amount of the antistatic agent added is preferably 0.001 to 10% by weight, more preferably 0.01 to 5% by weight, based on the total amount of the polymerizable compounds contained in the polymerizable composition.
- the polymerizable composition used for producing the retardation film of the present invention may contain a dye as necessary.
- the dye to be used is not particularly limited, and may include known and commonly used dyes as long as the orientation is not disturbed.
- the dye examples include dichroic dyes and fluorescent dyes.
- examples of such dyes include polyazo dyes, anthraquinone dyes, cyanine dyes, phthalocyanine dyes, perylene dyes, perinone dyes, squarylium dyes and the like.
- the dye is preferably a liquid crystal dye. .
- dichroic dye examples include the following formulas (d-1) to (d-8)
- the addition amount of the dichroic dye or the like is preferably 0.001 to 10% by weight, more preferably 0.01 to 5% by weight, based on the total amount of the polymerizable compounds contained in the polymerizable composition. preferable.
- the polymerizable composition used for producing the retardation film of the present invention may contain a filler as necessary.
- the filler to be used is not particularly limited, and may contain known and commonly used fillers as long as the thermal conductivity of the obtained polymer is not lowered.
- the filler examples include inorganic fillers such as alumina, titanium white, aluminum hydroxide, talc, clay, mica, barium titanate, zinc oxide, and glass fiber, metal powder such as silver powder and copper powder, aluminum nitride, and nitride.
- thermally conductive fillers such as boron, silicon nitride, gallium nitride, silicon carbide, magnesia (aluminum oxide), alumina (aluminum oxide), crystalline silica (silicon oxide), fused silica (silicon oxide), silver nanoparticles, etc. Can be mentioned.
- Non-liquid crystalline compound having a polymerizable group A compound having a polymerizable group but not a liquid crystal compound may be added to the polymerizable composition used for preparing the retardation film of the present invention.
- a compound can be used without particular limitation as long as it is generally recognized as a polymerizable monomer or polymerizable oligomer in this technical field.
- it is preferable that it is 15 mass% or less with respect to the total amount of the polymeric compound used for a polymeric composition, and 10 mass% or less is still more preferable.
- the polymerizable composition used for producing the retardation film of the present invention can contain an alignment material whose alignment is improved in order to improve the alignment.
- the alignment material to be used may be a known and conventional one as long as it is soluble in a solvent that can dissolve the liquid crystalline compound having a polymerizable group used in the polymerizable composition. It can be added within a range that does not significantly deteriorate. Specifically, it is preferably 0.05 to 30% by weight, more preferably 0.5 to 15% by weight, and more preferably 1 to 10% by weight based on the total amount of the polymerizable liquid crystal compound contained in the polymerizable liquid crystal composition. Particularly preferred.
- the alignment material is polyimide, polyamide, BCB (Penzocyclobutene Polymer), polyvinyl alcohol, polycarbonate, polystyrene, polyphenylene ether, polyarylate, polyethylene terephthalate, polyether sulfone, epoxy resin, epoxy acrylate resin, acrylic Resin, coumarin compound, chalcone compound, cinnamate compound, fulgide compound, anthraquinone compound, azo compound, arylethene compound, and other compounds that can be photoisomerized or photodimerized, but materials that are oriented by UV irradiation or visible light irradiation (Photo-alignment material) is preferable.
- photo-alignment material examples include polyimide having a cyclic cycloalkane, wholly aromatic polyarylate, polyvinyl cinnamate as disclosed in JP-A-5-232473, polyvinyl ester of paramethoxycinnamic acid, and JP-A-6-6. 287453, cinnamate derivatives as shown in JP-A-6-289374, maleimide derivatives as shown in JP-A-2002-265541, and the like. Specifically, compounds represented by the following formulas (12-1) to (12-7) are preferable.
- R represents a hydrogen atom, a halogen atom, an alkyl group having 1 to 3 carbon atoms, an alkoxy group, a nitro group
- R ′ represents a hydrogen atom or an alkyl group having 1 to 10 carbon atoms. May be linear or branched, and any hydrogen atom in the alkyl group may be substituted with a fluorine atom, and one —CH 2 — or adjacent group in the alkyl group may be substituted.
- two or more —CH 2 — groups independently represent —O—, —S—, —CO—, —COO—, —OCO—, —CO—S—, —S—CO—, —O—.
- the polymerizable composition used for producing the retardation film of the present invention is applied onto a substrate or a substrate having an alignment function, and the liquid crystal molecules in the polymerizable liquid crystal composition are converted into a nematic phase or a smectic.
- the phase difference film of the present invention can be obtained by uniformly aligning and polymerizing while maintaining the phase.
- the retardation film of the present invention has a hybrid orientation.
- the hybrid alignment has an alignment state in which the tilt angle at the substrate interface and the tilt angle at the air interface are greatly different.
- the tilt angle at the substrate interface is preferably 0 to 45 °, more preferably 0 to 20 °, still more preferably 0 to 10 °, still more preferably 0 to 5 °, and most preferably 0 to 3 °.
- the tilt angle at the air interface is preferably 45 to 90 °, more preferably 50 to 80 °, and even more preferably 55 to 75 °.
- the tilt angle may be such that the substrate interface and the air interface are reversed as shown in FIG.
- the liquid crystal molecules in the polymerizable liquid crystal composition are aligned while maintaining a twisted structure in the substrate plane.
- the twisted structure indicates an orientation state as shown in FIG.
- the angle formed by the alignment direction at the substrate interface and the alignment direction at the air interface is called a twist angle.
- the twist angle is preferably 10 to 80 °, more preferably 25 to 80 °, still more preferably 30 to 70 °, and most preferably 45 to 65 °.
- the base material used in the retardation film of the present invention is a base material usually used for liquid crystal display elements, organic light emitting display elements, other display elements, optical components, colorants, markings, printed matter and optical films, and is polymerizable.
- base materials include glass base materials, metal base materials, ceramic base materials, plastic base materials, and organic materials such as paper.
- examples thereof include cellulose derivatives, polyolefins, polyesters, polyolefins, polycarbonates, polyacrylates, polyarylates, polyether sulfones, polyimides, polyphenylene sulfides, polyphenylene ethers, nylons, and polystyrenes.
- plastic substrates such as polyester, polystyrene, polyolefin, cellulose derivatives, polyarylate, and polycarbonate are preferable.
- a shape of a base material you may have a curved surface other than a flat plate.
- These base materials may have an electrode layer, an antireflection function, and a reflection function as needed.
- these substrates may be subjected to surface treatment.
- the surface treatment include ozone treatment, plasma treatment, corona treatment, silane coupling treatment, and the like.
- an organic thin film, an inorganic oxide thin film, a metal thin film, etc. are provided on the surface of the substrate by a method such as vapor deposition, or in order to add optical added value.
- the material may be a pickup lens, a rod lens, an optical disk, a retardation film, a light diffusion film, a color filter, or the like.
- a pickup lens, a retardation film, a light diffusion film, and a color filter that have higher added value are preferable.
- Orientation treatment In addition, the substrate is usually subjected to an orientation treatment so that the polymerizable composition is oriented when the polymerizable composition used for preparing the retardation film of the present invention is applied and dried.
- an alignment film may be provided.
- the alignment process stretching, rubbing, polarization ultraviolet visible light irradiation treatment, ion beam treatment, oblique deposition process of the SiO 2 to the substrate, and the like.
- the alignment film a known and conventional alignment film is used.
- Such alignment films include polyimide, polysiloxane, polyamide, polyvinyl alcohol, polycarbonate, polystyrene, polyphenylene ether, polyarylate, polyethylene terephthalate, polyethersulfone, epoxy resin, epoxy acrylate resin, acrylic resin, azo compound, coumarin.
- Examples thereof include compounds such as compounds, chalcone compounds, cinnamate compounds, fulgide compounds, anthraquinone compounds, azo compounds and arylethene compounds, and polymers and copolymers of the above compounds.
- the compound subjected to the alignment treatment by rubbing is preferably an alignment treatment or a compound in which crystallization of the material is promoted by inserting a heating step after the alignment treatment.
- liquid crystal molecules are aligned in the direction in which the substrate is aligned in the vicinity of the substrate.
- liquid crystal molecules are aligned horizontally, tilted or vertically with respect to the substrate.
- an alignment treatment method for the substrate For example, when polyimide or the like is rubbed, the substrate interface side is slightly tilted in the rubbing direction.
- photo-alignment films there are materials that can form a tilt angle on the substrate interface side by irradiating polarized ultraviolet rays from an oblique direction.
- the tilt angle on the substrate interface side is often about 0 °.
- the tilt angle on the air interface side can be adjusted by the type and addition amount of the above-mentioned surfactant and orientation control agent.
- the above-mentioned chiral compound is added to the polymerizable composition.
- the addition method is general.
- the twist angle can be adjusted by the addition amount of the chiral compound to be added.
- Application methods for obtaining the retardation film of the present invention include applicator method, bar coating method, spin coating method, roll coating method, direct gravure coating method, reverse gravure coating method, flexo coating method, inkjet method, and die coating method.
- Known methods such as a cap coating method, a dip coating method, a slit coating method, and a spray coating method can be performed. After applying the polymerizable composition, it is dried.
- the liquid crystal molecules in the polymerizable composition are preferably uniformly aligned while maintaining the smectic phase or nematic phase.
- One of the methods is a heat treatment method. Specifically, after the present polymerizable composition is applied onto a substrate, the liquid crystal composition has an N (nematic phase) -I (isotropic liquid phase) transition temperature (hereinafter referred to as NI transition temperature) or higher. To form an isotropic liquid state. From there, it is gradually cooled as necessary to develop a nematic phase. At this time, it is desirable to maintain the temperature at which the liquid crystal phase is once exhibited, and to sufficiently grow the liquid crystal phase domain into a mono domain. Alternatively, after the polymerizable composition is applied on the substrate, a heat treatment may be performed such that the temperature is maintained for a certain time within a temperature range in which the nematic phase of the polymerizable composition appears.
- the heating temperature is too high, the polymerizable liquid crystal compound may deteriorate due to an undesirable polymerization reaction. Moreover, when it cools too much, a polymeric composition raise
- the liquid crystal phase is cooled to a minimum temperature at which phase separation does not occur, that is, is supercooled, and polymerization is performed in a state where the liquid crystal phase is aligned at the temperature.
- a retardation film having higher alignment order and excellent transparency can be obtained.
- the polymerization is performed by light irradiation, specifically, it is preferable to irradiate visible ultraviolet light having a wavelength of 420 nm or less, and most preferable to irradiate ultraviolet light having a wavelength of 250 to 370 nm.
- the polymerizable composition causes decomposition or the like due to visible ultraviolet light of 420 nm or less, it may be preferable to perform polymerization treatment with visible ultraviolet light of 420 nm or more.
- Examples of the method for polymerizing the polymerizable composition used for producing the retardation film of the present invention include a method of irradiating active energy rays and a thermal polymerization method, but heating is not required, and at room temperature.
- the method of irradiating active energy rays is preferable because the reaction proceeds, and among them, the method of irradiating light such as ultraviolet rays is preferable because the operation is simple.
- the temperature at the time of irradiation is preferably set to 30 ° C. or less as much as possible in order to avoid the induction of thermal polymerization of the polymerizable composition by setting the temperature at which the polymerizable composition can maintain the liquid crystal phase.
- the polymerizable liquid crystal composition usually has a temperature within the range from the C (solid phase) -N (nematic) transition temperature (hereinafter abbreviated as the CN transition temperature) to the NI transition temperature range during the temperature rising process. Shows liquid crystal phase.
- the liquid crystal composition in a supercooled state is also included in the state in which the liquid crystal phase is retained. Specifically, irradiation with ultraviolet light of 390 nm or less is preferable, and irradiation with light having a wavelength of 250 to 370 nm is most preferable.
- the polymerizable composition causes decomposition or the like due to ultraviolet light of 390 nm or less
- This light is preferably diffused light and unpolarized light.
- Ultraviolet irradiation intensity in the range of 0.05kW / m 2 ⁇ 10kW / m 2 is preferred. In particular, the range of 0.2 kW / m 2 to 2 kW / m 2 is preferable.
- the ultraviolet intensity is less than 0.05 kW / m 2 , it takes a lot of time to complete the polymerization.
- the liquid crystal molecules in the polymerizable composition tend to be photodegraded, or a large amount of polymerization heat is generated to increase the temperature during the polymerization. May change, and the retardation of the film after polymerization may be distorted.
- the orientation state of the unpolymerized part is changed by applying an electric field, a magnetic field or temperature, and then the unpolymerized part is polymerized.
- a retardation film having a plurality of regions having orientation directions can also be obtained.
- the alignment was regulated in advance by applying an electric field, magnetic field or temperature to the unpolymerized polymerizable liquid crystal composition, and the state was maintained.
- a retardation film having a plurality of regions having different orientation directions can also be obtained by irradiating light from above the mask to cause polymerization.
- the retardation film obtained by polymerizing the polymerizable liquid crystal composition used in the present invention can be peeled off from the substrate and used alone as a retardation film, or can be used as it is without being peeled off from the substrate. You can also. In particular, since it is difficult to contaminate other members, it is useful when used as a laminated substrate or by being attached to another substrate. (Ellipse polarizing plate) By laminating the retardation film of the present invention with a linear polarizing plate, the elliptically polarizing plate of the present invention can be produced. As the linear polarizing plate, one having a protective film on one side or both sides of the polarizer is usually used.
- the polarizer is not particularly limited, and various types can be used.
- a hydrophilic polymer film such as a polyvinyl alcohol film, a partially formalized polyvinyl alcohol film, an ethylene / vinyl acetate copolymer partially saponified film.
- polyene-based oriented films such as those obtained by adsorbing dichroic substances such as iodine and dichroic dyes and uniaxially stretched, polyvinyl alcohol dehydrated products and polyvinyl chloride dehydrochlorinated products.
- dichroic substances such as iodine and dichroic dyes
- uniaxially stretched, polyvinyl alcohol dehydrated products and polyvinyl chloride dehydrochlorinated products are preferably used.
- a wire grid type polarizing plate or the like may be used.
- the angle between the absorption axis of the polarizing plate and the slow axis of the retardation plate is preferably 40 to 50 °. 43 to 47 ° is more preferable, and 45 ° is most preferable.
- the angle between the absorption axis of the polarizing plate and the slow axis of the surface close to the polarizing plate is preferably 60 to 100 °, more preferably 70 to 90 °, and more preferably 80 to 90 °. Even more preferably, it is 90 °.
- the angle between the absorption axis of the polarizing plate and the slow axis on the surface far from the polarizing plate is preferably 0 to 60 °, more preferably 10 to 50 °, and more preferably 20 to 40 °. Even more preferred.
- the elliptically polarizing plate can be applied by directly applying the polymerizable composition used in the present invention on the polarizing plate in addition to laminating the retardation film of the present invention with the linear polarizing plate.
- a retardation film layer can also be formed directly.
- the retardation film of the present invention can also be used for a liquid crystal display element.
- the liquid crystal display element has a liquid crystal medium layer, a TFT drive circuit, a black matrix layer, a color filter layer, a spacer, and a liquid crystal medium layer at least sandwiched by corresponding electrode circuits on at least two base materials.
- the layer, the polarizing plate layer, and the touch panel layer are arranged outside the two substrates, but in some cases, the optical compensation layer, the overcoat layer, the polarizing plate layer, and the electrode layer for the touch panel are narrowed in the two substrates. May be held.
- Alignment modes of liquid crystal display elements include TN mode, VA mode, IPS mode, FFS mode, OCB mode, etc.
- a phase difference corresponding to the orientation mode is used.
- the film which has can be created. It can also be used with a patterned retardation film.
- the retardation film and elliptically polarizing plate of the present invention can be used for the organic light emitting display device of the present invention. As a usage form, it can be used as an antireflection film of an organic light emitting display element.
- polymerizable composition (1) for Examples.
- Polymerizable composition (2) to (36) Polymerizable compositions (2) to (34) for Examples and Comparative Examples under the same conditions as the preparation of the polymerizable composition (1) except that the respective compounds shown in the following table were changed to the ratios shown in the following table. Polymerizable compositions (35) to (36) for use were obtained.
- Tables 1 to 5 below show specific compositions of the polymerizable compositions (1) to (34) for the present invention and the polymerizable compositions (35) to (36) for the comparative examples.
- Re (450 nm) / Re (550 nm) of the above compounds are as follows.
- Respective retardation films (1) to (34) (Examples 1 to 34) and retardation films (35) (Comparative Example 1) were prepared using the polymerizable compositions (1) to (36).
- a retardation film (36) (Comparative Example 2) was produced.
- a polyethylene naphthalate film substrate (PEN manufactured by Teijin Limited) was spin-coated with a 3% polyvinyl alcohol solution (the solvent was a mixture of pure water and ethanol in a weight ratio of 1: 1), dried at 120 ° C. for 5 minutes, and then rayon. Rubbed with a cloth.
- the polymerizable compositions (1) to (36) were applied with a spin coater while adjusting the phase difference at 550 nm to be 138 ⁇ 5 nm, and then dried at 80 ° C. for 3 minutes. Further, it was left at 60 ° C. for 5 minutes.
- the resulting coated composition of the polymerizable composition was irradiated with ultraviolet rays having an energy of 1 J / cm 2 for UVB.
- the obtained retardation film was peeled from the substrate to obtain a thin film of the retardation film.
- Table 6 shows the value of (Formula 1-1): Re (450 nm) / Re (550 nm), the tilt angle of the liquid crystal on the PEN substrate side, the tilt angle of the liquid crystal on the air interface side, and the twist angle of each retardation film. Shown in The value of (Equation 1-1) is measured using a phase difference measuring device RET-100 (manufactured by Otsuka Electronics Co., Ltd.), and the tilt angle is measured with a tilt angle measuring device (AxoScan, manufactured by AXOMRETRICS). Then, numerical values were calculated by fitting. About the twist angle, the relationship of PC value (P: pitch length, C: addition density
- PC value P: pitch length, C: addition density
- the retardation film thin film and the commercially available polarizing plate were prepared by contacting the polarizing film with the surface that was on the substrate side of the retardation film and the angle of the slow axis of the surface that was on the substrate side and the absorption axis of the polarizing plate (
- the elliptical polarizing plates were produced by pasting so that the lamination angle) was the values shown in Tables 6 and 7.
- the retardation film thin film and the commercially available polarizing plate are obtained by absorbing the retardation axis and the polarizing axis of the surface that was on the substrate side and the absorption axis of the polarizing plate and the slow axis of the surface that was on the air interface side and the absorption of the polarizing plate.
- the surface that was on the substrate side of the retardation film and the polarizing plate were bonded together so that the angle of the axis became the values shown in Tables 8 and 9, and an elliptically polarizing plate was produced.
- the structure of the example is superior in color after being left at a high temperature as compared with the structure of the comparative example.
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Abstract
Description
Re(450)/Re(550)<1 (式1-1)
(式中、Re(450)は波長450nmにおける面内の位相差を表し、Re(550)は波長550nmにおける面内の位相差を表す。)
該位相差層を形成する材料が少なくとも1種類以上の一般式(1)~(7)からなる群から選ばれる重合性液晶性化合物を含有する重合性組成物であり、該位相差層がハイブリッド構造をとることを特徴とする位相差フィルムを提供する。
(式中、Re(450nm)は、本発明の位相差フィルムの450nmの波長における面内位相差を表し、Re(550nm)は、550nmの波長における面内位相差を表す。)
より好ましくは、下記(式1-2)を満たすものであり、更により好ましくは下記(式1-3)を満たすものである。
0.8<Re(450nm)/Re(550nm)<0.87 (式1-3)
S11~S72はスペーサー基を又は単結合を表すが、S11~S72が複数存在する場合それらは各々同一であっても異なっていても良く、
X11~X72は-O-、-S-、-OCH2-、-CH2O-、-CO-、-COO-、-OCO-、-CO-S-、-S-CO-、-O-CO-O-、-CO-NH-、-NH-CO-、-SCH2-、-CH2S-、-CF2O-、-OCF2-、-CF2S-、-SCF2-、-CH=CH-COO-、-CH=CH-OCO-、-COO-CH=CH-、-OCO-CH=CH-、-COO-CH2CH2-、-OCO-CH2CH2-、-CH2CH2-COO-、-CH2CH2-OCO-、-COO-CH2-、-OCO-CH2-、-CH2-COO-、-CH2-OCO-、-CH=CH-、-N=N-、-CH=N-N=CH-、-CF=CF-、-C≡C-又は単結合を表すが、X11~X72が複数存在する場合それらは各々同一であっても異なっていても良く(ただし、各P-(S-X)-結合には-O-O-を含まない。)、
MG11~MG71は各々独立して式(a)を表し、
A11、A12は各々独立して1,4-フェニレン基、1,4-シクロヘキシレン基、ピリジン-2,5-ジイル基、ピリミジン-2,5-ジイル基、ナフタレン-2,6-ジイル基、ナフタレン-1,4-ジイル基、テトラヒドロナフタレン-2,6-ジイル基、デカヒドロナフタレン-2,6-ジイル基又は1,3-ジオキサン-2,5-ジイル基を表すが、これらの基は無置換又は1つ以上のL1によって置換されても良いが、A11及び/又はA12が複数現れる場合は各々同一であっても異なっていても良く、
Z11及びZ12は各々独立して-O-、-S-、-OCH2-、-CH2O-、-CH2CH2-、-CO-、-COO-、-OCO-、-CO-S-、-S-CO-、-O-CO-O-、-CO-NH-、-NH-CO-、-SCH2-、-CH2S-、-CF2O-、-OCF2-、-CF2S-、-SCF2-、-CH=CH-COO-、-CH=CH-OCO-、-COO-CH=CH-、-OCO-CH=CH-、-COO-CH2CH2-、-OCO-CH2CH2-、-CH2CH2-COO-、-CH2CH2-OCO-、-COO-CH2-、-OCO-CH2-、-CH2-COO-、-CH2-OCO-、-CH=CH-、-N=N-、-CH=N-、-N=CH-、-CH=N-N=CH-、-CF=CF-、-C≡C-又は単結合を表すが、Z11及び/又はZ12が複数現れる場合は各々同一であっても異なっていても良く、
Mは下記の式(M-1)から式(M-11)
Gは下記の式(G-1)から式(G-6)
W81は少なくとも1つの芳香族基を有する、炭素原子数5から30の基を表すが、当該基は無置換又は1つ以上のL1によって置換されても良く、
W82は水素原子、又は、炭素原子数1から20のアルキル基を表すが、当該アルキル基は直鎖状であっても分岐状であっても良く、当該アルキル基中の任意の水素原子はフッ素原子及び/又は-OHに置換されても良く、当該アルキル基中の1個の-CH2-又は隣接していない2個以上の-CH2-は各々独立して-O-、-S-、-CO-、-COO-、-OCO-、-CO-S-、-S-CO-、-O-CO-O-、-CO-NH-、-NH-CO-、-CH=CH-COO-、-CH=CH-OCO-、-COO-CH=CH-、-OCO-CH=CH-、-CH=CH-、-CF=CF-又は-C≡C-によって置換されても良く、若しくは、W82はW81と同様の意味を表しても良く、また、W81及びW82は互いに連結し同一の環構造を形成しても良く、若しくはW82はP8-(S8-X8)j-で表される基を表しても良く、P8は重合性基を表し、S8はスペーサー基又は単結合を表すが、S8が複数存在する場合それらは同一であっても異なっていても良く、X8は-O-、-S-、-OCH2-、-CH2O-、-CO-、-COO-、-OCO-、-CO-S-、-S-CO-、-O-CO-O-、-CO-NH-、-NH-CO-、-SCH2-、-CH2S-、-CF2O-、-OCF2-、-CF2S-、-SCF2-、-CH=CH-COO-、-CH=CH-OCO-、-COO-CH=CH-、-OCO-CH=CH-、-COO-CH2CH2-、-OCO-CH2CH2-、-CH2CH2-COO-、-CH2CH2-OCO-、-COO-CH2-、-OCO-CH2-、-CH2-COO-、-CH2-OCO-、-CH=CH-、-N=N-、-CH=N-N=CH-、-CF=CF-、-C≡C-又は単結合を表すが、X8が複数存在する場合それらは同一であっても異なっていても良く(ただし、P8-(S8-X8)j-には-O-O-結合を含まない。)、jは0から10の整数を表し、
W83及びW84はそれぞれ独立してハロゲン原子、シアノ基、ヒドロキシ基、ニトロ基、カルボキシル基、カルバモイルオキシ基、アミノ基、スルファモイル基、少なくとも1つの芳香族基を有する炭素原子数5から30の基、炭素原子数1から20のアルキル基、炭素原子数3から20のシクロアルキル基、炭素原子数2から20のアルケニル基、炭素原子数3から20のシクロアルケニル基、炭素原子数1から20のアルコキシ基、炭素原子数2から20のアシルオキシ基、炭素原子数2から20の又は、アルキルカルボニルオキシ基を表すが、前記アルキル基、シクロアルキル基、アルケニル基、シクロアルケニル基、アルコキシ基、アシルオキシ基、アルキルカルボニルオキシ基中の1個の-CH2-又は隣接していない2個以上の-CH2-は各々独立して-O-、-S-、-CO-、-COO-、-OCO-、-CO-S-、-S-CO-、-O-CO-O-、-CO-NH-、-NH-CO-又は-C≡C-によって置換されても良く、但し、上記Mが式(M-1)~式(M-10)から選択される場合Gは式(G-1)~式(G-5)から選択され、Mが式(M-11)である場合Gは式(G-6)を表し、
L1はフッ素原子、塩素原子、臭素原子、ヨウ素原子、ペンタフルオロスルフラニル基、ニトロ基、イソシアノ基、アミノ基、ヒドロキシル基、メルカプト基、メチルアミノ基、ジメチルアミノ基、ジエチルアミノ基、ジイソプロピルアミノ基、トリメチルシリル基、ジメチルシリル基、チオイソシアノ基、又は、炭素原子数1から20のアルキル基を表すが、当該アルキル基は直鎖状であっても分岐状であっても良く、任意の水素原子はフッ素原子に置換されても良く、当該アルキル基中の1個の-CH2-又は隣接していない2個以上の-CH2-は各々独立して-O-、-S-、-CO-、-COO-、-OCO-、-CO-S-、-S-CO-、-O-CO-O-、-CO-NH-、-NH-CO-、-CH=CH-COO-、-CH=CH-OCO-、-COO-CH=CH-、-OCO-CH=CH-、-CH=CH-、-CF=CF-又は-C≡C-から選択される基によって置換されても良いが、化合物内にL1が複数存在する場合それらは同一であっても異なっていても良く、
j11は1から5の整数、j12は1~5の整数を表すが、j11+j12は2から5の整数を表す。)、R11及びR31は水素原子、フッ素原子、塩素原子、臭素原子、ヨウ素原子、ペンタフルオロスルフラニル基、シアノ基、ニトロ基、イソシアノ基、チオイソシアノ基、又は、炭素原子数1から20のアルキル基を表すが、当該アルキル基は直鎖状であっても分岐状であっても良く、当該アルキル基中の任意の水素原子はフッ素原子に置換されても良く、当該アルキル基中の1個の-CH2-又は隣接していない2個以上の-CH2-は各々独立して-O-、-S-、-CO-、-COO-、-OCO-、-CO-S-、-S-CO-、-O-CO-O-、-CO-NH-、-NH-CO-又は-C≡C-によって置換されても良く、m11は0~8の整数を表し、m2~m7、n2~n7、l4~l6、k6は各々独立して0から5の整数を表す。)
一般式(1)から一般式(7)において、重合性基P11~P74は下記の式(P-1)から式(P-20)
W81は少なくとも1つの芳香族基を有する、炭素原子数5から30の基を表すが、当該基は無置換であるか又は1つ以上のL1によって置換されても良く、
W82は、水素原子、又は、炭素原子数1から20のアルキル基を表すが、当該アルキル基は直鎖状であっても分岐状であっても良く、当該アルキル基中の任意の水素原子はフッ素原子に置換されても良く、当該アルキル基中の1個の-CH2-又は隣接していない2個以上の-CH2-は各々独立して-O-、-S-、-CO-、-COO-、-OCO-、-CO-S-、-S-CO-、-O-CO-O-、-CO-NH-、-NH-CO-、-CH=CH-COO-、-CH=CH-OCO-、-COO-CH=CH-、-OCO-CH=CH-、-CH=CH-、-CF=CF-又は-C≡C-によって置換されても良く、若しくは、W82はW81と同様の意味を表しても良く、また、W81及びW82は一緒になって環構造を形成しても良い。
一般式(2)で表される化合物として具体的には、下記の式(2-a-1)から式(2-a-68)で表される化合物が好ましい。
これらの液晶性化合物は、単独で使用することもできるし、2種類以上混合して使用することもできる。
(その他の液晶性化合物)
本発明の位相差フィルムを作製するために用いる重合性組成物には、一般式(1)から一般式(7)の液晶性化合物以外にも、重合性基を1つ以上有する液晶性化合物を含有することができる。そのような液晶化合物として、一般式(1-b)から一般式(7-b)の液晶化合物が挙げられる。しかし、添加量が多すぎると、(数式1-1)の値が1をこえてしまうため、添加する場合は、重合性組成物に用いる重合性化合物の合計量に対して30質量%以下とすることが好ましく、20質量%以下がさらに好ましく、10質量%以下が特に好ましい。
Z83及びZ84は各々独立して-O-、-S-、-OCH2-、-CH2O-、-CH2CH2-、-CO-、-COO-、-OCO-、-CO-S-、-S-CO-、-O-CO-O-、-CO-NH-、-NH-CO-、-SCH2-、-CH2S-、-CF2O-、-OCF2-、-CF2S-、-SCF2-、-CH=CH-COO-、-CH=CH-OCO-、-COO-CH=CH-、-OCO-CH=CH-、-COO-CH2CH2-、-OCO-CH2CH2-、-CH2CH2-COO-、-CH2CH2-OCO-、-COO-CH2-、-OCO-CH2-、-CH2-COO-、-CH2-OCO-、-CH=CH-、-N=N-、-CH=N-、-N=CH-、-CH=N-N=CH-、-CF=CF-、-C≡C-又は単結合を表すが、Z83及び/又はZ84が複数現れる場合は各々同一であっても異なっていても良く、
M81は1,4-フェニレン基、1,4-シクロヘキシレン基、1,4-シクロヘキセニル基、テトラヒドロピラン-2,5-ジイル基、1,3-ジオキサン-2,5-ジイル基、テトラヒドロチオピラン-2,5-ジイル基、1,4-ビシクロ(2,2,2)オクチレン基、デカヒドロナフタレン-2,6-ジイル基、ピリジン-2,5-ジイル基、ピリミジン-2,5-ジイル基、ピラジン-2,5-ジイル基、チオフェン-2,5-ジイル基-、1,2,3,4-テトラヒドロナフタレン-2,6-ジイル基、ナフチレン-1,4-ジイル基、ナフチレン-1,5-ジイル基、ナフチレン-1,6-ジイル基、ナフチレン-2,6-ジイル基、フェナントレン-2,7-ジイル基、9,10-ジヒドロフェナントレン-2,7-ジイル基、1,2,3,4,4a,9,10a-オクタヒドロフェナントレン-2,7-ジイル基、ベンゾ[1,2-b:4,5-b‘]ジチオフェン-2,6-ジイル基、ベンゾ[1,2-b:4,5-b‘]ジセレノフェン-2,6-ジイル基、[1]ベンゾチエノ[3,2-b]チオフェン-2,7-ジイル基、[1]ベンゾセレノフェノ[3,2-b]セレノフェン-2,7-ジイル基、又はフルオレン-2,7-ジイル基から選ばれる基を表すが、これらの基は無置換又は1つ以上のL2によって置換されても良く、
L2はフッ素原子、塩素原子、臭素原子、ヨウ素原子、ペンタフルオロスルフラニル基、ニトロ基、イソシアノ基、アミノ基、ヒドロキシル基、メルカプト基、メチルアミノ基、ジメチルアミノ基、ジエチルアミノ基、ジイソプロピルアミノ基、トリメチルシリル基、ジメチルシリル基、チオイソシアノ基、又は、炭素原子数1から20のアルキル基を表すが、当該アルキル基は直鎖状であっても分岐状であっても良く、任意の水素原子はフッ素原子に置換されても良く、当該アルキル基中の1個の-CH2-又は隣接していない2個以上の-CH2-は各々独立して-O-、-S-、-CO-、-COO-、-OCO-、-CO-S-、-S-CO-、-O-CO-O-、-CO-NH-、-NH-CO-、-CH=CH-COO-、-CH=CH-OCO-、-COO-CH=CH-、-OCO-CH=CH-、-CH=CH-、-CF=CF-又は-C≡C-から選択される基によって置換されても良いが、化合物内にL2が複数存在する場合それらは同一であっても異なっていても良く、mは0から8の整数を表し、j83及びj84は各々独立して0から5の整数を表すが、j83+j84は1から5の整数を表す。)、R11及びR31は水素原子、フッ素原子、塩素原子、臭素原子、ヨウ素原子、ペンタフルオロスルフラニル基、シアノ基、ニトロ基、イソシアノ基、チオイソシアノ基、又は、炭素原子数1から20のアルキル基を表すが、当該アルキル基は直鎖状であっても分岐状であっても良く、当該アルキル基中の任意の水素原子はフッ素原子に置換されても良く、当該アルキル基中の1個の-CH2-又は隣接していない2個以上の-CH2-は各々独立して-O-、-S-、-CO-、-COO-、-OCO-、-CO-S-、-S-CO-、-O-CO-O-、-CO-NH-、-NH-CO-又は-C≡C-によって置換されても良く、m11は0~8の整数を表し、m2~m7、n2~n7、l4~l6、k6は各々独立して0から5の整数を表す。但し、一般式(1)から一般式(7)を除く。)
一般式(1-b)で表される化合物として具体的には、下記の式(1-b-1)から式(1-b-39)で表される化合物が挙げられる。
一般式(2-b)で表される化合物として具体的には、下記の式(2-b-1)から式(2-b-34)で表される化合物が挙げられる。
一般式(3-b)で表される化合物として具体的には、下記の式(3-b-1)から式(3-b-16)で表される化合物が挙げられる。
一般式(4-b)で表される化合物として具体的には、下記の式(4-b-1)から式(4-b-29)で表される化合物が挙げられる。
一般式(5-b)で表される化合物として具体的には、下記の式(5-b-1)から式(5-b-26)で表される化合物が挙げられる。
一般式(6-b)で表される化合物として具体的には、下記の式(6-b-1)から式(6-b-23)で表される化合物が挙げられる。
これらの液晶性化合物は、単独で使用することもできるし、2種類以上混合して使用することもできる。
(キラル化合物)
本発明の位相差フィルムを作製するために用いられる重合性組成物には、キラルネマチック相を得ることを目的としてキラル化合物を含有してもよい。前記キラル化合物は、それ自体が液晶性を示す必要はなく、また、重合性基を有していても、有していなくてもよい。また、キラル化合物の螺旋の向きは、重合体の使用用途によって適宜選択することができる。
A1、A2、A3、A4、A5及びA6はそれぞれ独立して、1,4-フェニレン基、1,4-シクロヘキシレン基、1,4-シクロヘキセニル基、テトラヒドロピラン-2,5-ジイル基、1,3-ジオキサン-2,5-ジイル基、テトラヒドロチオピラン-2,5-ジイル基、1,4-ビシクロ(2,2,2)オクチレン基、デカヒドロナフタレン-2,6-ジイル基、ピリジン-2,5-ジイル基、ピリミジン-2,5-ジイル基、ピラジン-2,5-ジイル基、チオフェン-2,5-ジイル基-、1,2,3,4-テトラヒドロナフタレン-2,6-ジイル基、2,6-ナフチレン基、フェナントレン-2,7-ジイル基、9,10-ジヒドロフェナントレン-2,7-ジイル基、1,2,3,4,4a,9,10a-オクタヒドロフェナントレン-2,7-ジイル基、1,4-ナフチレン基、ベンゾ[1,2-b:4,5-b‘]ジチオフェン-2,6-ジイル基、ベンゾ[1,2-b:4,5-b‘]ジセレノフェン-2,6-ジイル基、[1]ベンゾチエノ[3,2-b]チオフェン-2,7-ジイル基、[1]ベンゾセレノフェノ[3,2-b]セレノフェン-2,7-ジイル基、又はフルオレン-2,7-ジイル基を表し、n、l及びkはそれぞれ独立して、0又は1を表し、0≦n+l+k≦3となり、
m5は0又は1を表し、
Z0、Z1、Z2、Z3、Z4、Z5及びZ6はそれぞれ独立して、-COO-、-OCO-、-CH2 CH2-、-OCH2-、-CH2O-、-CH=CH-、-C≡C-、-CH=CHCOO-、-OCOCH=CH-、-CH2CH2COO-、-CH2CH2OCO-、-COOCH2CH2-、-OCOCH2CH2-、-CONH-、-NHCO-、炭素数2~10のハロゲン原子を有してもよいアルキル基又は単結合を表し、
R5a及びR5bは、水素原子、ハロゲン原子、シアノ基又は炭素原子数1~18のアルキル基を表すが、該アルキル基は1つ以上のハロゲン原子又はCNにより置換されていても良く、この基中に存在する1つのCH2基又は隣接していない2つ以上のCH2基はそれぞれ相互に独立して、酸素原子が相互に直接結合しない形で、-O-、-S-、-NH-、-N(CH3)-、-CO-、-COO-、-OCO-、-OCOO-、-SCO-、-COS-又は-C≡C-により置き換えられていても良く、あるいはR5a及びR5bは一般式(10-a)
P5aは、下記の式(P-1)から式(P-20)で表される重合性基から選ばれる置換基を表す。
(重合開始剤)
本発明の位相差フィルムを作製するために用いる重合性組成物には、必要に応じて開始剤を含有することができる。重合性組成物で用いられる重合開始剤は、本発明に用いられる重合性組成物を重合させるために用いる。重合を光照射によって行う場合に使用する光重合開始剤としては、特に限定はないが、重合性組成物における重合性化合物の配向状態を阻害しない程度で公知慣用のものが使用できる。
LAMBSON社の「スピードキュアBMS」、「スピードキュアPBZ」、「ベンゾフェノン」等が挙げられる。さらに、光カチオン開始剤としては、光酸発生剤を用いることができる。光酸発生剤としてはジアゾジスルホン系化合物、トリフェニルスルホニウム系化合物、フェニルスルホン系化合物、スルフォニルピリジン系化合物、トリアジン系化合物及びジフェニルヨードニウム化合物などが挙げられる。
(重合抑制剤)
本発明の位相差フィルムを作製するための重合性組成物には、重合抑制剤を含有することができる。重合性組成物は、当該重合抑制剤を用いることにより、重合性組成物として高温で保存された場合に、不必要な重合が抑制され、保存安定性を確保することができる。また、位相差フィルムとした場合に、塗膜に耐熱性を付与できるため、耐久性を十分確保することができる。
前記フェノール系重合抑制剤としては、ハイドロキノン、メトキシフェノール、メチルハイドロキノン、ターシャリーブチルハイドロキノン、ターシャリーブチルカテコールのいずれかが好ましい。
(添加剤)
本発明の位相差フィルムを作製するために用いる重合性組成物には、各々の目的に応じて汎用の添加剤を使用することもできる。例えば、酸化防止剤、紫外線吸収剤、レベリング剤、配向制御剤、連鎖移動剤、赤外線吸収剤、チキソ剤、帯電防止剤、色素、フィラー、キラル化合物、重合性基を有する非液晶性化合物、その他液晶化合物、配向材料等の添加剤を液晶の配向性を著しく低下させない程度添加することができる。
(酸化防止剤)
本発明の位相差フィルムを作製するために用いる重合性組成物には、必要に応じて酸化防止剤等を含有することができる。そのような化合物として、ヒドロキノン誘導体、ニトロソアミン系重合禁止剤、ヒンダードフェノール系酸化防止剤等が挙げられ、より具体的には、tert-ブチルハイドロキノン、和光純薬工業社の「Q-1300」、「Q-1301」、ペンタエリスリトールテトラキス[3-(3,5-ジ-tert-ブチル-4-ヒドロキシフェニル)プロピオネート「IRGANOX1010」、チオジエチレンビス[3-(3,5-ジ-tert-ブチル-4-ヒドロキシフェニル)プロピオネート「IRGANOX1035」、オクタデシル-3-(3,5-ジ-tert-ブチル-4-ヒドロキシフェニル)プロピオネート「IRGANOX1076」、「IRGANOX1135」、「IRGANOX1330」、4,6-ビス(オクチルチオメチル)-o-クレゾール「IRGANOX1520L」、「IRGANOX1726」、「IRGANOX245」、「IRGANOX259」、「IRGANOX3114」、「IRGANOX3790」、「IRGANOX5057」、「IRGANOX565」(以上、BASF株式会社製)、株式会社ADEKA製のアデカスタブAO-20、AO-30、AO-40、AO-50、AO-60、AO-80、住友化学株式会社のスミライザーBHT、スミライザーBBM-S、およびスミライザーGA-80等々があげられる。
(紫外線吸収剤)
本発明の位相差フィルムを作製するために用いる重合性組成物には、必要に応じて紫外線吸収剤や光安定剤を含有することができる。用いる紫外線吸収剤や光安定剤は特に限定はないが、位相差フィルムの耐光性を向上させるものが好ましい。
(レベリング剤)
本発明の位相差フィルムを作製するための重合性組成物には、必要に応じてレベリング剤を含有することができる。用いるレベリング剤は特に限定はないが、位相差フィルムの薄膜を形成する場合に膜厚むらを低減させるためものが好ましい。 前記レベリング剤としては、アルキルカルボン酸塩、アルキルリン酸塩、アルキルスルホン酸塩、フルオロアルキルカルボン酸塩、フルオロアルキルリン酸塩、フルオロアルキルスルホン酸塩、ポリオキシエチレン誘導体、フルオロアルキルエチレンオキシド誘導体、ポリエチレングリコール誘導体、アルキルアンモニウム塩、フルオロアルキルアンモニウム塩類等が挙げられる。
「フタージェント100」、「フタージェント100C」、「フタージェント110」、「フタージェント150」、「フタージェント150CH」、「フタージェント100A-K」、「フタージェント300」、「フタージェント310」、「フタージェント320」、「フタージェント400SW」、「フタージェント251」、「フタージェント215M」、「フタージェント212M」、「フタージェント215M」、「フタージェント250」、「フタージェント222F」、「フタージェント212D」、「FTX-218」、「フタージェント209F」、「フタージェント245F」、「フタージェント208G」、「フタージェント240G」、「フタージェント212P」、「フタージェント220P」、「フタージェント228P」、「DFX-18」、「フタージェント601AD」、「フタージェント602A」、「フタージェント650A」、「フタージェント750FM」、「FTX-730FM」、「フタージェント730FL」、「フタージェント710FS」、「フタージェント710FM」、「フタージェント710FL」、「フタージェント750LL」、「FTX-730LS」、「フタージェント730LM」、(以上、株式会社ネオス製)、
「BYK-300」、「BYK-302」、「BYK-306」、「BYK-307」、「BYK-310」、「BYK-315」、「BYK-320」、「BYK-322」、「BYK-323」、「BYK-325」、「BYK-330」、「BYK-331」、「BYK-333」、「BYK-337」、「BYK-340」、「BYK-344」、「BYK-370」、「BYK-375」、「BYK-377」、「BYK-350」、「BYK-352」、「BYK-354」、「BYK-355」、「BYK-356」、「BYK-358N」、「BYK-361N」、「BYK-357」、「BYK-390」、「BYK-392」、「BYK-UV3500」、「BYK-UV3510」、「BYK-UV3570」、「BYK-Silclean3700」(以上、BYK株式会社製)、
「TEGO Rad2100」、「TEGO Rad2011」、「TEGO Rad2200N」、「TEGO Rad2250」、「TEGO Rad2300」、「TEGO Rad2500」、「TEGO Rad2600」、「TEGO Rad2650」、「TEGO Rad2700」、「TEGO Flow300」、「TEGO Flow370」、「TEGO Flow425」、「TEGO Flow ATF2」、「TEGO Flow ZFS460」、「TEGO Glide100」、「TEGO Glide110」、「TEGO Glide130」、「TEGO Glide410」、「TEGO Glide411」、「TEGO Glide415」、「TEGO Glide432」、「TEGO Glide440」、「TEGO Glide450」、「TEGO Glide482」、「TEGO Glide A115」、「TEGO Glide B1484」、「TEGO Glide ZG400」、「TEGO Twin4000」、「TEGO Twin4100」、「TEGO Twin4200」、「TEGO Wet240」、「TEGO Wet250」、「TEGO Wet260」、「TEGO Wet265」、「TEGO Wet270」、「TEGO Wet280」、「TEGO Wet500」、「TEGO Wet505」、「TEGO Wet510」、「TEGO Wet520」、「TEGO Wet KL245」、(以上、エボニック・インダストリーズ株式会社製)、「FC-4430」、「FC-4432」(以上、スリーエムジャパン株式会社製)、「ユニダインNS」(以上、ダイキン工業株式会社製)、「サーフロンS-241」、「サーフロンS-242」、「サーフロンS-243」、「サーフロンS-420」、「サーフロンS-611」、「サーフロンS-651」、「サーフロンS-386」(以上、AGCセイミケミカル株式会社製)、「DISPARLON OX-880EF」、「DISPARLON OX-881」、「DISPARLON OX-883」、「DISPARLON OX-77EF」、「DISPARLON OX-710」、「DISPARLON 1922」、「DISPARLON 1927」、「DISPARLON 1958」、「DISPARLON P-410EF」、「DISPARLON P-420」、「DISPARLON P-425」、「DISPARLON PD-7」、「DISPARLON 1970」、「DISPARLON 230」、「DISPARLON LF-1980」、「DISPARLON LF-1982」、「DISPARLON LF-1983」、「DISPARLON LF-1084」、「DISPARLON LF-1985」、「DISPARLON LHP-90」、「DISPARLON LHP-91」、「DISPARLON LHP-95」、「DISPARLON LHP-96」、「DISPARLON OX-715」、「DISPARLON 1930N」、「DISPARLON 1931」、「DISPARLON 1933」、「DISPARLON 1934」、「DISPARLON 1711EF」、「DISPARLON 1751N」、「DISPARLON 1761」、「DISPARLON LS-009」、「DISPARLON LS-001」、「DISPARLON LS-050」(以上、楠本化成株式会社製)、「PF-151N」、「PF-636」、「PF-6320」、「PF-656」、「PF-6520」、「PF-652-NF」、「PF-3320」(以上、OMNOVA SOLUTIONS社製)、「ポリフローNo.7」、「ポリフローNo.50E」、「ポリフローNo.50EHF」、「ポリフローNo.54N」、「ポリフローNo.75」、「ポリフローNo.77」、「ポリフローNo.85」、「ポリフローNo.85HF」、「ポリフローNo.90」、「ポリフローNo.90D-50」、「ポリフローNo.95」、「ポリフローNo.99C」、「ポリフローKL-400K」、「ポリフローKL-400HF」、「ポリフローKL-401」、「ポリフローKL-402」、「ポリフローKL-403」、「ポリフローKL-404」、「ポリフローKL-100」、「ポリフローLE-604」、「ポリフローKL-700」、「フローレンAC-300」、「フローレンAC-303」、「フローレンAC-324」、「フローレンAC-326F」、「フローレンAC-530」、「フローレンAC-903」、「フローレンAC-903HF」、「フローレンAC-1160」、「フローレンAC-1190」、「フローレンAC-2000」、「フローレンAC-2300C」、「フローレンAO-82」、「フローレンAO-98」、「フローレンAO-108」(以上、共栄社化学株式会社製)、「L-7001」、「L-7002」、「8032ADDITIVE」、「57ADDTIVE」、「L-7064」、「FZ-2110」、「FZ-2105」、「67ADDTIVE」、「8616ADDTIVE」(以上、東レ・ダウシリコーン株式会社製)等の例を挙げることができる。
(配向制御剤)
本発明の位相差フィルムを作製するために用いる重合性組成物には、重合性化合物の配向状態を制御するために、配向制御剤を含有することができる。用いる配向制御剤としては、液晶性化合物が、基材に対して実質的に水平配向、実質的に垂直配向、実質的にハイブリッド配向するものが挙げられる。また、キラル化合物を添加した場合には実質的に平面配向するものが挙げられる。前述したように、界面活性剤によって、水平配向、平面配向が誘起される場合もあるが、各々の配向状態が誘起されるものであれば、特に限定はなく、公知慣用のものを使用することができる。
また、フルオロアルキル基で変性された棒状液晶性化合物、円盤状液晶性化合物、分岐構造を有してもよい長鎖脂肪族アルキル基を含有した重合性化合物、等も挙げられる。
(連鎖移動剤)
本発明に用いる重合性組成物は、重合体や位相差フィルムと基材との密着性をより向上させるため、連鎖移動剤を含有することができる。連鎖移動剤としては、芳香族炭化水素類、クロロホルム、四塩化炭素、四臭化炭素、ブロモトリクロロメタン等のハロゲン化炭化水素類、
オクチルメルカプタン、n―ブチルメルカプタン、n―ペンチルメルカプタン、n-ヘキサデシルメルカプタン、n-テトラデシルメル、n―ドデシルメルカプタン、t-テトラデシルメルカプタン、t―ドデシルメルカプタン等のメルカプタン化合物、ヘキサンジチオール、デカンジチオール、1,4-ブタンジオールビスチオプロピオネート、1,4-ブタンジオールビスチオグリコレート、エチレングリコールビスチオグリコレート、エチレングリコールビスチオプロピオネート、トリメチロールプロパントリスチオグリコレート、トリメチロールプロパントリスチオプロピオネート、トリメチロールプロパントリス(3-メルカプトブチレート)、ペンタエリスリトールテトラキスチオグリコレート、ペンタエリスリトールテトラキスチオプロピオネート、トリメルカプトプロピオン酸トリス(2-ヒドロキシエチル)イソシアヌレート、1,4-ジメチルメルカプトベンゼン、2、4、6-トリメルカプト-s-トリアジン、2-(N,N-ジブチルアミノ)-4,6-ジメルカプト-s-トリアジン等のチオール化合物、ジメチルキサントゲンジスルフィド、ジエチルキサントゲンジスルフィド、ジイソプロピルキサントゲンジスルフィド、テトラメチルチウラムジスルフィド、テトラエチルチウラムジスルフィド、テトラブチルチウラムジスルフィド等のスルフィド化合物、N,N-ジメチルアニリン、N,N-ジビニルアニリン、ペンタフェニルエタン、α-メチルスチレンダイマー、アクロレイン、アリルアルコール、ターピノーレン、α-テルピネン、γ-テルビネン、ジペンテン、等が挙げられるが、2,4-ジフェニル-4-メチル-1-ペンテン、チオール化合物がより好ましい。
(赤外線吸収剤)
本発明の位相差フィルムを作製するために用いる重合性組成物には、必要に応じて赤外線吸収剤を含有することができる。用いる赤外線吸収剤は、特に限定はなく、配向性を乱さない範囲で公知慣用のものを含有することができる。
(帯電防止剤)
本発明の位相差フィルムを作製するために用いる重合性組成物には、必要に応じて帯電防止剤を含有することができる。用いる帯電防止剤は、特に限定はなく、配向性を乱さない範囲で公知慣用のものを含有することができる。
(色素)
本発明の位相差フィルムを作製するために用いる重合性組成物には、必要に応じて色素を含有することができる。用いる色素は、特に限定はなく、配向性を乱さない範囲で公知慣用のものを含有することができる。
CRC Press、1994年、および「機能性色素市場の新展開」、第一章、1頁、1994年、CMC株式会社発光、等に記載の色素を使用することができる。
(フィラー)
本発明の位相差フィルムを作製するために用いる重合性組成物には、必要に応じてフィラーを含有することができる。用いるフィラーは、特に限定はなく、得られた重合物の熱伝導性が低下しない範囲で公知慣用のものを含有することができる。
(重合性基を有する非液晶性化合物)
本発明の位相差フィルムを作製するために用いられる重合性組成物には、重合性基を有するが液晶化合物ではない化合物を添加することもできる。このような化合物としては、通常、この技術分野で重合性モノマーあるいは重合性オリゴマーとして認識されるものであれば特に制限なく使用することができる。添加する場合は、重合性組成物に用いる重合性化合物の合計量に対して、15質量%以下であることが好ましく、10質量%以下が更に好ましい。
(配向材料)
本発明の位相差フィルムを作製するために用いられる重合性組成物には、その配向性を向上させるために配向性が向上する配向材料を含有することができる。用いる配向材料は、重合性組成物に用いられる、重合性基を有する液晶性化合物を溶解させることができる溶剤に可溶であれば、公知慣用のものでよいが、添加することにより配向性を著しく劣化させない範囲で添加することができる。具体的には、重合性液晶組成物に含まれる重合性液晶性化合物の総量に対して0.05~30重量%が好ましく、0.5~15重量%がさらに好ましく、1~10重量%が特に好ましい。
(位相差フィルム及び位相差フィルムの製造方法)
(位相差フィルム)
本発明の位相差フィルムを作製するために用いられる重合性組成物を、基材、あるいは、配向機能を有する基材上に塗布し、重合性液晶組成物中の液晶分子を、ネマチック相やスメクチック相を保持した状態で均一に配向させ、重合させることによって、本発明の位相差フィルムを得ることができる。
(基材)
本発明の位相差フィルムに用いられる基材は、液晶表示素子、有機発光表示素子、その他表示素子、光学部品、着色剤、マーキング、印刷物や光学フィルムに通常使用する基材であって、重合性組成物溶液の塗布後の乾燥時における加熱に耐えうる耐熱性を有する材料であれば、特に制限はない。そのような基材としては、ガラス基材、金属基材、セラミックス基材、プラスチック基材や紙等の有機材料が挙げられる。特に基材が有機材料の場合、セルロース誘導体、ポリオレフィン、ポリエステル、ポリオレフィン、ポリカーボネート、ポリアクリレート、ポリアリレート、ポリエーテルサルホン、ポリイミド、ポリフェニレンスルフィド、ポリフェニレンエーテル、ナイロン又はポリスチレン等が挙げられる。中でもポリエステル、ポリスチレン、ポリオレフィン、セルロース誘導体、ポリアリレート、ポリカーボネート等のプラスチック基材が好ましい。基材の形状としては、平板の他、曲面を有するものであっても良い。これらの基材は、必要に応じて、電極層、反射防止機能、反射機能を有していてもよい。
(配向処理)
また、上記基材には、本発明の位相差フィルムを作製するために用いられる重合性組成物を塗布乾燥した際に重合性組成物が配向するように、通常配向処理が施されている、あるいは配向膜が設けられていても良い。配向処理としては、延伸処理、ラビング処理、偏光紫外可視光照射処理、イオンビーム処理、基材へのSiO2の斜方蒸着処理、等が挙げられる。配向膜を用いる場合、配向膜は公知慣用のものが用いられる。そのような配向膜としては、ポリイミド、ポリシロキサン、ポリアミド、ポリビニルアルコール、ポリカーボネート、ポリスチレン、ポリフェニレンエーテル、ポリアリレート、ポリエチレンテレフタレート、ポリエーテルサルホン、エポキシ樹脂、エポキシアクリレート樹脂、アクリル樹脂、アゾ化合物、クマリン化合物、カルコン化合物、シンナメート化合物、フルギド化合物、アントラキノン化合物、アゾ化合物、アリールエテン化合物等の化合物、もしくは、前記化合物の重合体や共重合体が挙げられる。ラビングにより配向処理する化合物は、配向処理、もしくは配向処理の後に加熱工程を入れることで材料の結晶化が促進されるものが好ましい。ラビング以外の配向処理を行う化合物の中では光配向材料を用いることが好ましい。
一方、ツイスト角を形成させるためには、重合性組成物に前述のキラル化合物を添加する手法が一般的である、ツイスト角は添加するキラル化合物の添加量により調整することができる。
(塗布)
本発明の位相差フィルムを得るための塗布法としては、アプリケーター法、バーコーティング法、スピンコーティング法、ロールコーティング法、ダイレクトグラビアコーティング法、リバースグラビアコーティング法、フレキソコーティング法、インクジェット法、ダイコーティング法、キャップコーティング法、ディップコーティング法、スリットコーティング法、スプレーコーティング法等、公知慣用の方法を行うことができる。重合性組成物を塗布後、乾燥させる。
(重合工程)
乾燥した重合性組成物の重合処理は、一様に配向した状態で一般に可視紫外線等の光照射、あるいは加熱によって行われる。重合を光照射で行う場合は、具体的には420nm以下の可視紫外光を照射することが好ましく、250~370nmの波長の紫外光を照射することが最も好ましい。但し、420nm以下の可視紫外光により重合性組成物が分解などを引き起こす場合は、420nm以上の可視紫外光で重合処理を行ったほうが好ましい場合もある。
(重合方法)
本発明の位相差フィルムを作製するために用いられるの重合性組成物を重合させる方法としては、活性エネルギー線を照射する方法や熱重合法等が挙げられるが、加熱を必要とせず、室温で反応が進行することから活性エネルギー線を照射する方法が好ましく、中でも、操作が簡便なことから、紫外線等の光を照射する方法が好ましい。照射時の温度は、重合性組成物が液晶相を保持できる温度とし、重合性組成物の熱重合の誘起を避けるため、可能な限り30℃以下とすることが好ましい。尚、重合性液晶組成物は、通常、昇温過程において、C(固相)-N(ネマチック)転移温度(以下、C-N転移温度と略す。)から、N-I転移温度範囲内で液晶相を示す。一方、降温過程においては、熱力学的に非平衡状態を取るため、C-N転移温度以下でも凝固せず液晶状態を保つ場合がある。この状態を過冷却状態という。本発明においては、過冷却状態にある液晶組成物も液晶相を保持している状態に含めるものとする。具体的には390nm以下の紫外光を照射することが好ましく、250~370nmの波長の光を照射することが最も好ましい。但し、390nm以下の紫外光により重合性組成物が分解などを引き起こす場合は、390nm以上の紫外光で重合処理を行ったほうが好ましい場合もある。この光は、拡散光で、かつ偏光していない光であることが好ましい。紫外線照射強度は、0.05kW/m2~10kW/m2の範囲が好ましい。特に、0.2kW/m2~2kW/m2の範囲が好ましい。紫外線強度が0.05kW/m2未満の場合、重合を完了させるのに多大な時間がかかる。一方、2kW/m2を超える強度では、重合性組成物中の液晶分子が光分解する傾向にあることや、重合熱が多く発生して重合中の温度が上昇し、重合性液晶のオーダーパラメーターが変化して、重合後のフィルムのリタデーションに狂いが生じる可能性がある。
(楕円偏光板)
本発明の位相差フィルムを直線偏光板と張り合わせることで、本発明の楕円偏光板を作製することができる。直線偏光板としては通常、偏光子の片側または両側に保護フィルムを有するものが使用される。偏光子は、特に制限されず、各種のものを使用でき、例えば、ポリビニルアルコール系フィルム、部分ホルマール化ポリビニルアルコール系フィルム、エチレン・酢酸ビニル共重合体系部分ケン化フィルム等の親水性高分子フィルムに、ヨウ素や二色性染料等の二色性物質を吸着させて一軸延伸したもの、ポリビニルアルコールの脱水処理物やポリ塩化ビニルの脱塩酸処理物等のポリエン系配向フィルム等が挙げられる。これらのなかでもポリビニルアルコール系フィルムを延伸して二色性材料(沃素、染料)を吸着・配向したものが好適に用いられる。また、ワイヤーグリッド型偏光板等を用いてもよい。
(液晶表示素子)
本発明の位相差フィルムは液晶表示素子に用いることもできる。液晶表示素子は、少なくとも二つの基材に液晶媒体層、TFT駆動回路、ブラックマトリックス層、カラーフィルター層、スペーサー、液晶媒体層に相応の電極回路が最低限狭持されており、通常、光学補償層、偏光板層、タッチパネル層は二つの基材の外側に配置されるが、場合によっては、光学補償層、オーバーコート層、偏光板層、タッチパネル用の電極層が二つの基材内に狭持されてもよい。
(有機発光表示素子)
本発明の位相差フィルム、及び楕円偏光板は、本発明の有機発光表示素子に使用することができる。使用形態としては、有機発光表示素子の反射防止フィルムとして使用することができる。
(重合性組成物(1))
式(2-a-40)で表される化合物100部をシクロペンタノン(CPN)250部に加えた後、60℃に加温、撹拌して溶解させ、溶解が確認された後、室温に戻し、イルガキュアOXE01(OXE01:BASF社製)5部、p-メトキシフェノール(MEHQ)0.1部、及び、メガファックF-556(F-556:DIC株式会社製)0.2部を加えてさらに撹拌を行い、溶液を得た。溶液は透明で均一であった。得られた溶液を0.20μmのメンブランフィルターでろ過し、実施例用の重合性組成物(1)を得た。
(重合性組成物(2)~(36))
下記表に示す各化合物をそれぞれ下記表に示す割合に変更した以外は重合性組成物(1)の調整と同一条件で、実施例用の重合性組成物(2)~(34)及び比較例用の重合性組成物(35)~(36)を得た。
(重合性組成物(1)~(36)を用いた位相差フィルムの評価)
上記重合性組成物(1)~(36)の各組成物を以下の条件で位相差フィルム(1)~(34)(実施例1~34)、位相差フィルム(35)(比較例1)、位相差フィルム(36)(比較例2)を作製した。
上記の方法で作製された楕円偏光板を用いて、以下の評価基準に基づき視認性の評価を行った。
(視認性評価)
(色目)
色目については、有機ELパネル搭載のSAMSUNG社製GALAXY SIIにおいて、用いられている円偏光板の変わりに、上記の楕円偏光板を張り合わせて、正面又は斜め45°からの黒色の色味づきを下記基準で評価した。
A:反射光の色づきがほとんど視認されない。(許容)
B:反射光の色づきがごくわずかに視認されるが実用上問題ない。(許容)
C:反射光の色づきが少し視認されるが実用上問題ない。(許容)
D:反射光の色づきが視認される、用途によっては許容できる。(許容)
E:反射光の色づきが強く視認され、許容できない。
また、使用した楕円偏光板を80℃の恒温層に500時間放置した後の色目の評価も同様の基準で行った。
結果を表10、表11に示す。
Claims (10)
- 位相差層を有する位相差フィルムであって、該光学フィルムが(式1-1)を満たし、
Re(450)/Re(550)<1 (式1-1)
(式中、Re(450)は波長450nmにおける面内の位相差を表し、Re(550)は波長550nmにおける面内の位相差を表す。)
該位相差層を形成する材料が少なくとも1種類以上の下記一般式(1)~(7)からなる群から選ばれる重合性液晶性化合物を含有する重合性組成物であり、
該位相差層がハイブリッド構造をとることを特徴とする位相差フィルム。
S11~S72はスペーサー基を又は単結合を表すが、S11~S72が複数存在する場合それらは各々同一であっても異なっていても良く、
X11~X72は-O-、-S-、-OCH2-、-CH2O-、-CO-、-COO-、-OCO-、-CO-S-、-S-CO-、-O-CO-O-、-CO-NH-、-NH-CO-、-SCH2-、-CH2S-、-CF2O-、-OCF2-、-CF2S-、-SCF2-、-CH=CH-COO-、-CH=CH-OCO-、-COO-CH=CH-、-OCO-CH=CH-、-COO-CH2CH2-、-OCO-CH2CH2-、-CH2CH2-COO-、-CH2CH2-OCO-、-COO-CH2-、-OCO-CH2-、-CH2-COO-、-CH2-OCO-、-CH=CH-、-N=N-、-CH=N-N=CH-、-CF=CF-、-C≡C-又は単結合を表すが、X11~X72が複数存在する場合それらは各々同一であっても異なっていても良く(ただし、各P-(S-X)-結合には-O-O-を含まない。)、
MG11~MG71は各々独立して式(a)を表し、
A11、A12は各々独立して1,4-フェニレン基、1,4-シクロヘキシレン基、ピリジン-2,5-ジイル基、ピリミジン-2,5-ジイル基、ナフタレン-2,6-ジイル基、ナフタレン-1,4-ジイル基、テトラヒドロナフタレン-2,6-ジイル基、デカヒドロナフタレン-2,6-ジイル基又は1,3-ジオキサン-2,5-ジイル基を表すが、これらの基は無置換又は1つ以上のL1によって置換されても良いが、A11及び/又はA12が複数現れる場合は各々同一であっても異なっていても良く、
Z11及びZ12は各々独立して-O-、-S-、-OCH2-、-CH2O-、-CH2CH2-、-CO-、-COO-、-OCO-、-CO-S-、-S-CO-、-O-CO-O-、-CO-NH-、-NH-CO-、-SCH2-、-CH2S-、-CF2O-、-OCF2-、-CF2S-、-SCF2-、-CH=CH-COO-、-CH=CH-OCO-、-COO-CH=CH-、-OCO-CH=CH-、-COO-CH2CH2-、-OCO-CH2CH2-、-CH2CH2-COO-、-CH2CH2-OCO-、-COO-CH2-、-OCO-CH2-、-CH2-COO-、-CH2-OCO-、-CH=CH-、-N=N-、-CH=N-、-N=CH-、-CH=N-N=CH-、-CF=CF-、-C≡C-又は単結合を表すが、Z11及び/又はZ12が複数現れる場合は各々同一であっても異なっていても良く、
Mは下記の式(M-1)から式(M-11)
Gは下記の式(G-1)から式(G-6)
W81は少なくとも1つの芳香族基を有する、炭素原子数5から30の基を表すが、当該基は無置換又は1つ以上のL1によって置換されても良く、
W82は水素原子、又は、炭素原子数1から20のアルキル基を表すが、当該アルキル基は直鎖状であっても分岐状であっても良く、当該アルキル基中の任意の水素原子はフッ素原子及び/又は-OHに置換されても良く、当該アルキル基中の1個の-CH2-又は隣接していない2個以上の-CH2-は各々独立して-O-、-S-、-CO-、-COO-、-OCO-、-CO-S-、-S-CO-、-O-CO-O-、-CO-NH-、-NH-CO-、-CH=CH-COO-、-CH=CH-OCO-、-COO-CH=CH-、-OCO-CH=CH-、-CH=CH-、-CF=CF-又は-C≡C-によって置換されても良く、若しくは、W82はW81と同様の意味を表しても良く、また、W81及びW82は互いに連結し同一の環構造を形成しても良く、若しくはW82はP8-(S8-X8)j-で表される基を表しても良く、P8は重合性基を表し、S8はスペーサー基又は単結合を表すが、S8が複数存在する場合それらは同一であっても異なっていても良く、X8は-O-、-S-、-OCH2-、-CH2O-、-CO-、-COO-、-OCO-、-CO-S-、-S-CO-、-O-CO-O-、-CO-NH-、-NH-CO-、-SCH2-、-CH2S-、-CF2O-、-OCF2-、-CF2S-、-SCF2-、-CH=CH-COO-、-CH=CH-OCO-、-COO-CH=CH-、-OCO-CH=CH-、-COO-CH2CH2-、-OCO-CH2CH2-、-CH2CH2-COO-、-CH2CH2-OCO-、-COO-CH2-、-OCO-CH2-、-CH2-COO-、-CH2-OCO-、-CH=CH-、-N=N-、-CH=N-N=CH-、-CF=CF-、-C≡C-又は単結合を表すが、X8が複数存在する場合それらは同一であっても異なっていても良く(ただし、P8-(S8-X8)j-には-O-O-結合を含まない。)、jは0から10の整数を表し、
W83及びW84はそれぞれ独立してハロゲン原子、シアノ基、ヒドロキシ基、ニトロ基、カルボキシル基、カルバモイルオキシ基、アミノ基、スルファモイル基、少なくとも1つの芳香族基を有する炭素原子数5から30の基、炭素原子数1から20のアルキル基、炭素原子数3から20のシクロアルキル基、炭素原子数2から20のアルケニル基、炭素原子数3から20のシクロアルケニル基、炭素原子数1から20のアルコキシ基、炭素原子数2から20のアシルオキシ基、炭素原子数2から20の又は、アルキルカルボニルオキシ基を表すが、前記アルキル基、シクロアルキル基、アルケニル基、シクロアルケニル基、アルコキシ基、アシルオキシ基、アルキルカルボニルオキシ基中の1個の-CH2-又は隣接していない2個以上の-CH2-は各々独立して-O-、-S-、-CO-、-COO-、-OCO-、-CO-S-、-S-CO-、-O-CO-O-、-CO-NH-、-NH-CO-又は-C≡C-によって置換されても良く、但し、上記Mが式(M-1)~式(M-10)から選択される場合Gは式(G-1)~式(G-5)から選択され、Mが式(M-11)である場合Gは式(G-6)を表し、
L1はフッ素原子、塩素原子、臭素原子、ヨウ素原子、ペンタフルオロスルフラニル基、ニトロ基、イソシアノ基、アミノ基、ヒドロキシル基、メルカプト基、メチルアミノ基、ジメチルアミノ基、ジエチルアミノ基、ジイソプロピルアミノ基、トリメチルシリル基、ジメチルシリル基、チオイソシアノ基、又は、炭素原子数1から20のアルキル基を表すが、当該アルキル基は直鎖状であっても分岐状であっても良く、任意の水素原子はフッ素原子に置換されても良く、当該アルキル基中の1個の-CH2-又は隣接していない2個以上の-CH2-は各々独立して-O-、-S-、-CO-、-COO-、-OCO-、-CO-S-、-S-CO-、-O-CO-O-、-CO-NH-、-NH-CO-、-CH=CH-COO-、-CH=CH-OCO-、-COO-CH=CH-、-OCO-CH=CH-、-CH=CH-、-CF=CF-又は-C≡C-から選択される基によって置換されても良いが、化合物内にL1が複数存在する場合それらは同一であっても異なっていても良く、
j11は1から5の整数、j12は1~5の整数を表すが、j11+j12は2から5の整数を表す。)、R11及びR31は水素原子、フッ素原子、塩素原子、臭素原子、ヨウ素原子、ペンタフルオロスルフラニル基、シアノ基、ニトロ基、イソシアノ基、チオイソシアノ基、又は、炭素原子数1から20のアルキル基を表すが、当該アルキル基は直鎖状であっても分岐状であっても良く、当該アルキル基中の任意の水素原子はフッ素原子に置換されても良く、当該アルキル基中の1個の-CH2-又は隣接していない2個以上の-CH2-は各々独立して-O-、-S-、-CO-、-COO-、-OCO-、-CO-S-、-S-CO-、-O-CO-O-、-CO-NH-、-NH-CO-又は-C≡C-によって置換されても良く、m11は0~8の整数を表し、m2~m7、n2~n7、l4~l6、k6は各々独立して0から5の整数を表す。) - 前記重合性組成物中にキラル化合物を含有する、請求項1又は請求項2に記載の位相差フィルム。
- 前記キラル化合物が重合性キラル化合物である、請求項3に記載の位相差フィルム。
- 前記位相差フィルムの液晶組成物の一方の面方向のチルト角が0~20°であり、もう一方の面方向のチルト角が45~90°である請求項1~4のいずれか一項に記載の位相差フィルム。
- 前記位相差フィルムのツイスト角が25~80°である、請求項1~5のいずれか一項に記載の位相差フィルム。
- 請求項1~6のいずれか一項に記載の位相差フィルムと偏光板を張り合わせた楕円偏光板。
- 請求項1~6のいずれか一項に記載の位相差フィルムを配置した表示素子。
- 請求項7に記載の楕円偏光板を配置した表示素子。
- 請求項7に記載の楕円偏光板を配置した有機発光表示素子。
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- 2017-07-06 WO PCT/JP2017/024776 patent/WO2018012390A1/ja active Application Filing
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Also Published As
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US20210284766A1 (en) | 2021-09-16 |
KR20190018705A (ko) | 2019-02-25 |
JPWO2018012390A1 (ja) | 2018-11-08 |
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