WO2007046365A1 - 粘着剤組成物、粘着剤層およびその製造方法、ならびに粘着剤付光学部材 - Google Patents
粘着剤組成物、粘着剤層およびその製造方法、ならびに粘着剤付光学部材 Download PDFInfo
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- WO2007046365A1 WO2007046365A1 PCT/JP2006/320634 JP2006320634W WO2007046365A1 WO 2007046365 A1 WO2007046365 A1 WO 2007046365A1 JP 2006320634 W JP2006320634 W JP 2006320634W WO 2007046365 A1 WO2007046365 A1 WO 2007046365A1
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- pressure
- sensitive adhesive
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- film
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- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229940088644 n,n-dimethylacrylamide Drugs 0.000 description 1
- YLGYACDQVQQZSW-UHFFFAOYSA-N n,n-dimethylprop-2-enamide Chemical compound CN(C)C(=O)C=C YLGYACDQVQQZSW-UHFFFAOYSA-N 0.000 description 1
- 125000000740 n-pentyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 125000003518 norbornenyl group Chemical group C12(C=CC(CC1)C2)* 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- MSRJTTSHWYDFIU-UHFFFAOYSA-N octyltriethoxysilane Chemical compound CCCCCCCC[Si](OCC)(OCC)OCC MSRJTTSHWYDFIU-UHFFFAOYSA-N 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000012766 organic filler Substances 0.000 description 1
- 150000001451 organic peroxides Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- VTRUBDSFZJNXHI-UHFFFAOYSA-N oxoantimony Chemical compound [Sb]=O VTRUBDSFZJNXHI-UHFFFAOYSA-N 0.000 description 1
- 125000000913 palmityl 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])[H] 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 125000002958 pentadecyl 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])[H] 0.000 description 1
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 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
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- XNGIFLGASWRNHJ-UHFFFAOYSA-L phthalate(2-) Chemical compound [O-]C(=O)C1=CC=CC=C1C([O-])=O XNGIFLGASWRNHJ-UHFFFAOYSA-L 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920002492 poly(sulfone) Polymers 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920001083 polybutene Polymers 0.000 description 1
- 229920006289 polycarbonate film Polymers 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 229920002530 polyetherether ketone Polymers 0.000 description 1
- 229920000193 polymethacrylate Polymers 0.000 description 1
- 229920000306 polymethylpentene Polymers 0.000 description 1
- 239000011116 polymethylpentene Substances 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 150000003077 polyols Chemical class 0.000 description 1
- 229920002503 polyoxyethylene-polyoxypropylene Polymers 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 229920006380 polyphenylene oxide Polymers 0.000 description 1
- 229920006264 polyurethane film Polymers 0.000 description 1
- 229940072033 potash Drugs 0.000 description 1
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 1
- 235000015320 potassium carbonate Nutrition 0.000 description 1
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- HNJBEVLQSNELDL-UHFFFAOYSA-N pyrrolidin-2-one Chemical compound O=C1CCCN1 HNJBEVLQSNELDL-UHFFFAOYSA-N 0.000 description 1
- 229920005604 random copolymer Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 229920006012 semi-aromatic polyamide Polymers 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- PPASLZSBLFJQEF-RKJRWTFHSA-M sodium ascorbate Substances [Na+].OC[C@@H](O)[C@H]1OC(=O)C(O)=C1[O-] PPASLZSBLFJQEF-RKJRWTFHSA-M 0.000 description 1
- 235000010378 sodium ascorbate Nutrition 0.000 description 1
- 229960005055 sodium ascorbate Drugs 0.000 description 1
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 description 1
- LNDCCSBWZAQAAW-UHFFFAOYSA-M sodium hydrogen sulfate sulfuric acid Chemical compound [Na+].OS(O)(=O)=O.OS([O-])(=O)=O LNDCCSBWZAQAAW-UHFFFAOYSA-M 0.000 description 1
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 description 1
- 235000019333 sodium laurylsulphate Nutrition 0.000 description 1
- PPASLZSBLFJQEF-RXSVEWSESA-M sodium-L-ascorbate Chemical compound [Na+].OC[C@H](O)[C@H]1OC(=O)C(O)=C1[O-] PPASLZSBLFJQEF-RXSVEWSESA-M 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000004544 sputter deposition 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
- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 229920006027 ternary co-polymer Polymers 0.000 description 1
- NMOALOSNPWTWRH-UHFFFAOYSA-N tert-butyl 7,7-dimethyloctaneperoxoate Chemical compound CC(C)(C)CCCCCC(=O)OOC(C)(C)C NMOALOSNPWTWRH-UHFFFAOYSA-N 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- LDHQCZJRKDOVOX-UHFFFAOYSA-N trans-crotonic acid Natural products CC=CC(O)=O LDHQCZJRKDOVOX-UHFFFAOYSA-N 0.000 description 1
- JXUKBNICSRJFAP-UHFFFAOYSA-N triethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CCO[Si](OCC)(OCC)CCCOCC1CO1 JXUKBNICSRJFAP-UHFFFAOYSA-N 0.000 description 1
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 description 1
- 125000006617 triphenylamine group Chemical group 0.000 description 1
- 238000001771 vacuum 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
- 238000005406 washing Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
- 239000011592 zinc chloride Substances 0.000 description 1
- 235000005074 zinc chloride Nutrition 0.000 description 1
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 description 1
- 229960001763 zinc sulfate Drugs 0.000 description 1
- 229910000368 zinc sulfate Inorganic materials 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J133/00—Adhesives 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; Adhesives based on derivatives of such polymers
- C09J133/04—Homopolymers or copolymers of esters
- C09J133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/62—Polymers of compounds having carbon-to-carbon double bonds
- C08G18/6216—Polymers of alpha-beta ethylenically unsaturated carboxylic acids or of derivatives thereof
- C08G18/622—Polymers of esters of alpha-beta ethylenically unsaturated carboxylic acids
- C08G18/6225—Polymers of esters of acrylic or methacrylic acid
- C08G18/6229—Polymers of hydroxy groups containing esters of acrylic or methacrylic acid with aliphatic polyalcohols
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/62—Polymers of compounds having carbon-to-carbon double bonds
- C08G18/6283—Polymers of nitrogen containing compounds having carbon-to-carbon double bonds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/77—Polyisocyanates or polyisothiocyanates having heteroatoms in addition to the isocyanate or isothiocyanate nitrogen and oxygen or sulfur
- C08G18/78—Nitrogen
- C08G18/7806—Nitrogen containing -N-C=0 groups
- C08G18/7843—Nitrogen containing -N-C=0 groups containing urethane groups
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J133/00—Adhesives 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; Adhesives based on derivatives of such polymers
- C09J133/24—Homopolymers or copolymers of amides or imides
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J135/00—Adhesives 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 a carboxyl radical, and containing at least another carboxyl radical in the molecule, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J135/02—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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2170/00—Compositions for adhesives
- C08G2170/40—Compositions for pressure-sensitive adhesives
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
-
- 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
- G02F2202/00—Materials and properties
- G02F2202/28—Adhesive materials or arrangements
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
- Y10T428/2852—Adhesive compositions
- Y10T428/2878—Adhesive compositions including addition polymer from unsaturated monomer
- Y10T428/2891—Adhesive compositions including addition polymer from unsaturated monomer including addition polymer from alpha-beta unsaturated carboxylic acid [e.g., acrylic acid, methacrylic acid, etc.] Or derivative thereof
Definitions
- Adhesive composition Adhesive composition, adhesive layer and method for producing the same, and optical member with adhesive
- the present invention relates to a pressure-sensitive adhesive composition. More specifically, the present invention relates to a pressure-sensitive adhesive composition that can exhibit excellent pressure-sensitive adhesive properties after a crosslinking reaction, and particularly excellent in durability even when the pressure-sensitive adhesive layer is thinned. Moreover, this invention relates to the adhesive layer formed with the said adhesive composition, and its manufacturing method. Furthermore, the present invention provides a pressure-sensitive optical member having the pressure-sensitive adhesive layer and an image display device using the same.
- a retardation film in order to compensate for coloration of a liquid crystal layer and to compensate for a change in retardation due to a viewing angle.
- Such optical materials are subject to large expansion and contraction under conditions of high heat and high humidity, and the resulting displacement tends to cause floating and peeling, and the adhesive is required to have durability that can cope with this.
- the pressure-sensitive adhesive layer (1) Z polybulualcohol-based retardation film Z pressure-sensitive adhesive layer (2)
- Sarakuko discloses a proposal to use an excellent adhesive containing an acrylamide derivative as a monomer component (see, for example, Patent Document 6).
- the thickness of the pressure-sensitive adhesive layer is also required due to the recent thinning of the display as described above.
- the durability under high temperature and high humidity is satisfied when the thickness is reduced. It became clear that it was difficult to meet the demand for further thinning, which was difficult to add.
- Patent Document 1 Japanese Patent Laid-Open No. 10-54906
- Patent Document 2 Japanese Patent Laid-Open No. 7-230006
- Patent Document 3 JP-A-7-218719
- Patent Document 4 JP-A-8-199134
- Patent Document 5 Japanese Patent No. 3645005
- Patent Document 6 Japanese Patent Laid-Open No. 9-176603
- Patent Document 7 JP-A-9-113724
- Patent Document 8 JP-A-9-288214
- Patent Document 9 Japanese Patent Laid-Open No. 2003-329838
- the present invention exhibits excellent adhesive properties after the cross-linking treatment that addresses the above-mentioned problems, and even when the pressure-sensitive adhesive layer is thinned, it floats by heat treatment or high-humidity treatment.
- Another object of the present invention is to provide a pressure-sensitive adhesive composition having excellent durability and no peeling.
- Another object of the present invention is to provide a pressure-sensitive adhesive layer formed from the pressure-sensitive adhesive composition and a method for producing the same. Furthermore, an object of this invention is to provide the optical member with an adhesive which has the said adhesive layer, and an image display apparatus using the same.
- the present inventors diligently studied the constitution of the pressure-sensitive adhesive composition.
- the (meth) acrylic polymer having a specific monomer composition was added to a peroxide and an isocyanate.
- a pressure-sensitive adhesive composition containing a specific amount of a cross-linking agent excellent adhesive properties are exhibited after the cross-linking treatment, and even when the pressure-sensitive adhesive layer is thinned, the heat treatment floats by high-humidity treatment.
- a pressure-sensitive adhesive composition excellent in durability could be obtained without peeling or peeling, and the present invention was completed.
- the pressure-sensitive adhesive composition of the present invention comprises:
- R is an alkyl group having 2 to 14 carbon atoms
- It contains 0.02 to 2 parts by weight of a peroxide and 0.02 to 2 parts by weight of an isocyanate cross-linking agent.
- a pressure-sensitive adhesive composition comprising a (meth) acrylic polymer having a specific monomer composition, a specific amount of an isocyanate cross-linking agent, and a peroxyacid compound is obtained.
- a pressure-sensitive adhesive layer having excellent durability that does not float or peel off due to heat treatment or high-humidity treatment even when it is thinned.
- the (meth) acrylic polymer is crosslinked with a specific amount of isocyanate-based crosslinking agent and peroxide. Therefore, the (meth) acrylic polymer has both cross-linking with a peroxide (peroxide cross-linking) and cross-linking with an isocyanate cross-linking agent (isocyanate cross-linking). The structure is a little different. At this time, the above-mentioned properties are not sufficiently exhibited by the peroxide cross-linking or the isocyanate cross-linking alone.
- R COOR (where R is hydrogen or a methyl group, R is an alkyl group having 2 to 14 carbon atoms)
- the (meth) acrylic polymer in the present invention means an acrylic polymer and a Z or methacrylic polymer.
- (meta) acrylate refers to ate and Z or meta acrylate.
- the nitrogen-containing monomer in the present invention refers to a polymerizable monomer containing one or more nitrogen atoms in the monomer structure.
- imide group-containing monomers and amide group-containing monomers are preferred.
- the pressure-sensitive adhesive composition of the present invention with respect to 100 parts by weight of the (meth) acrylic polymer. Further, it is characterized by containing 0.02 to 2 parts by weight of peroxide.
- the pressure-sensitive adhesive composition of the present invention is characterized by containing 0.02 to 2 parts by weight of an isocyanate cross-linking agent with respect to 100 parts by weight of the (meth) acrylic polymer.
- the isocyanate cross-linking agent in the present invention is a molecule of two or more isocyanate groups (including isocyanate-regenerating functional groups in which the isocyanate group is temporarily protected by a blocking agent, a quantifier, etc.). Use the isocyanate compound in it.
- the pressure-sensitive adhesive layer of the present invention is characterized in that it is formed by crosslinking the pressure-sensitive adhesive composition described in any of the above! According to the pressure-sensitive adhesive layer of the present invention, the pressure-sensitive adhesive composition having the above-described effects is crosslinked, so that even when the pressure-sensitive adhesive layer is thinned, heat treatment is performed. It becomes a highly durable adhesive layer that does not float or peel off due to high humidity treatment.
- the gel fraction of the pressure-sensitive adhesive layer is preferably 45 to 95% by weight.
- the pressure-sensitive adhesive layer preferably has a thickness of 1 to 15 m. Even when the pressure-sensitive adhesive layer of the present invention is thinned in this way, it does not float or peel off due to heat treatment or high-humidity treatment, and has excellent durability.
- the pressure-sensitive adhesive composition and pressure-sensitive adhesive layer of the present invention are particularly suitable for use as an optical member because they exhibit the above-described effects.
- the pressure-sensitive adhesive layer of the present invention includes, for example, a step of forming a layer made of any one of the above-mentioned pressure-sensitive adhesive compositions on one or both sides of a support, and a layer made of the pressure-sensitive adhesive composition.
- a production method comprising a step of subjecting a peroxide to a crosslinking treatment with a peroxide.
- the peroxide crosslinking treatment refers to a treatment in which the peroxide is decomposed by heat or light irradiation to generate radicals to crosslink the base polymer. Further, the peroxide crosslinking treatment is preferably a treatment for decomposing 50% by weight or more of the peroxide. [0033] Further, in the pressure-sensitive adhesive layer obtained by the above production method, the gel fraction of the pressure-sensitive adhesive layer is preferably 45 to 90% by weight.
- the pressure-sensitive adhesive layer preferably has a thickness of 1 to 15 m.
- the optical member with an adhesive of the present invention is characterized in that the above-mentioned adhesive layer is formed on one side or both sides of the optical member.
- the optical member with a pressure-sensitive adhesive of the present invention since the pressure-sensitive adhesive layer having the above-described effects is provided, even when the pressure-sensitive adhesive layer is thinned, heat treatment and high it becomes an optical member with a pressure-sensitive adhesive that has excellent durability and does not float or peel off due to moisture treatment.
- the image display device of the present invention is a liquid crystal display device, an organic EL display device, a PDP, or the like using the optical member with an adhesive, even when the adhesive layer is thinned. It has the function of exhibiting high durability that does not float or peel off by heat treatment or high-humidity treatment.
- FIG. 1 Schematic configuration diagram of durability evaluation in Examples, etc.
- the pressure-sensitive adhesive composition of the present invention comprises:
- R is an alkyl group having 2 to 14 carbon atoms
- It contains 0.02 to 2 parts by weight of a peroxide and 0.02 to 2 parts by weight of an isocyanate cross-linking agent.
- R is an alkyl group having 2 to 14 carbon atoms
- R is hydrogen or a methyl group and R is an alkyl group having 2 to 14 carbon atoms
- the main component is a (meth) acrylic monomer.
- R is hydrogen or a methyl group.
- R is an alkyl group having 2 to 14 carbon atoms, preferably 3 to 12 carbon atoms, preferably 4 to 9 carbon atoms.
- alkyl group of R can be either linear or branched.
- the (meth) acrylic polymer used in the present invention contains 0.1 to 35 wt%, preferably 3 to 30 wt%, more preferably 5 to 25 wt% of a nitrogen-containing monomer as a monomer unit. It is what you have. If the content of the nitrogen-containing monomer is less than 0.1% by weight, it may adversely affect adhesion and durability, such as peeling due to high temperature or high humidity, while the content of the nitrogen-containing monomer is 35%. If it exceeds wt%, the adhesiveness will deteriorate, causing problems such as peeling at high temperature and high humidity, and poor adhesion.
- the nitrogen-containing monomer refers to a polymerizable monomer containing one or more nitrogen atoms in the monomer structure.
- imide group-containing monomers and amide group-containing monomers are preferred.
- the amide group-containing monomer is particularly preferable as the nitrogen-containing monomer.
- the monomer unit is preferably contained in an amount of 3 to 15% by weight, more preferably 5 to LO weight%.
- Examples of the imide group-containing monomer include N cyclohexylmaleimide, N-phenylmaleimide, N-methylmaleimide, N-ethylmaleimide, N-propylmaleimide, N-isopropylmaleimide, N-butylmaleimide, and itaconimide. Can be given.
- Examples of the amide group-containing monomer include (meth) acrylamide, N, N dimethyl (meth) acrylamide, N, N jetyl (meth) acrylamide, N, N jetyl methacrylate, N-isopropyl (meth) acrylamide.
- nitrogen-containing monomers include, for example, amino group-containing monomers, (meth) atari Mouth-tolyl, N- (meth) attalyloylmorpholine, N-bule-2-pyrrolidone, etc.
- the (meth) acrylic polymer of the present invention as a monomer other than the above-mentioned monomers, a polymerizable monomer for adjusting the glass transition point and peelability of the (meth) acrylic polymer is used. It can be used as long as the effects of the invention are not impaired.
- polymerizable monomers used in the (meth) acrylic polymer of the present invention include, for example, a carboxyl group-containing monomer, a sulfonic acid group-containing monomer, a phosphoric acid group-containing monomer, a bull ester monomer, and an aromatic bur. Cohesive strength of monomers, etc., heat resistance improving components, components having functional groups that act as crosslinking points for improving adhesive strength such as acid anhydride group-containing monomers, hydroxyl group-containing monomers, epoxy group-containing monomers, vinyl ether monomers, etc.
- a (meth) acrylic monomer having an alkyl group having 1 or 15 carbon atoms can be appropriately used. These monomer compounds may be used alone or in admixture of two or more.
- carboxyl group-containing monomer examples include acrylic acid, methacrylic acid, carboxyxetyl (meth) acrylate, carboxypentyl (meth) acrylate, itaconic acid, maleic acid, fumaric acid, crotonic acid and the like. . Of these, acrylic acid and methacrylic acid are particularly preferably used.
- sulfonic acid group-containing monomers examples include styrene sulfonic acid, aryl sulfonic acid, 2- (meth) acrylamide-2-methylpropane sulfonic acid, (meth) acrylamide propsulfonic acid, sulfopropyl (meth) acrylate. And (meth) attaroyloxynaphthalene sulfonic acid.
- Examples of the phosphoric acid group-containing monomer include 2-hydroxyethyl allyloyl phosphate.
- bull ester monomer examples include vinyl acetate, bull propionate, bull laurate, bull pyrrolidone and the like.
- aromatic butyl monomer examples include styrene, chlorostyrene, chloromethylstyrene, a-methylstyrene, and the like.
- Examples of the acid anhydride group-containing monomer include maleic anhydride and itaconic anhydride. Can be given.
- Examples of the hydroxyl group-containing monomer include 2-hydroxyethyl (meth) acrylate, 2-hydroxybutyl (meth) acrylate, 3-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) ) Atarylate, 6-Hydroxyhexyl (meth) atarylate, 8 —Hydroxyoctyl (meth) atalylate, 10 —Hydroxydecyl (meth) atalylate, 12 —Hydroxylauryl (meth) attalylate, (4-hydroxy) Methylcyclohexyl) methyl phthalate, N-methylol (meth) acrylamide, N-hydroxy (meth) acrylamide, vinylenoreconole, linoleanoreconole, 2-hydroxyethinorevininoreatenore, 4-hydroxybutylbiene -Luether, diethylene glycol mono Yurueter
- Examples of the epoxy group-containing monomer include glycidyl (meth) acrylate and allylic glycidino acrylate.
- butyl ether monomer examples include methyl butyl ether, ethyl butyl ether, and isobutyl vinyl ether.
- Examples of the (meth) acrylic monomer having an alkyl group having 1 or 15 carbon atoms include methyl (meth) acrylate, pentadecyl (meth) acrylate, hexadecyl (meth) acrylate. Etc.
- the above other polymerizable monomers may be used alone or in combination of two or more, but the total content is based on the total amount of the (meth) acrylic polymer monomers. In this respect, it is preferably 0.1 to 10% by weight, more preferably 0.2 to 7% by weight, even more preferably 0.5 to 5% by weight.
- examples of the copolymerizable monomer other than the above include silane monomers containing a silicon atom.
- silane-based monomers include 3-ataryloxypropyltriethoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane, 4-vinylbutyltrimethoxysilane, 4-butylbutyltriethoxysilane, and 8-butyloctyltrisilane.
- the silane monomer may be used alone or in combination of two or more, but the total content is 100 parts by weight of the (meth) acrylic polymer. 0.1 to 3 parts by weight is preferred, and 0.5 to 2 parts by weight is more preferred. Copolymerization of a silane monomer is preferable for improving durability.
- the (meth) acrylic polymer used in the present invention preferably has a weight average molecular weight of 600,000 or more, more preferably 1.6 to 3 million, more preferably 1.8 to 3 million. More preferably. If the weight average molecular weight is less than 600,000, durability may be poor. On the other hand, the weight average molecular weight is preferably 3 million or less from the viewpoint of workability.
- the weight average molecular weight is a value measured by GPC (gel “permeation” chromatography) and calculated in terms of polystyrene.
- the glass transition temperature (Tg) of the (meth) acrylic polymer is -5 ° C or lower, preferably -10 ° C or lower.
- the glass transition temperature (Tg) of the (meth) acrylic polymer can be adjusted within the above range by appropriately changing the monomer component and composition ratio to be used.
- the production of such a (meth) acrylic polymer can be appropriately selected from known production methods such as solution polymerization, bulk polymerization, emulsion polymerization, and various radical polymerizations.
- the (meth) aryl polymer to be obtained may be any of a random copolymer, a block copolymer, a graft copolymer, and the like.
- solution polymerization as a polymerization solvent, for example, ethyl acetate, toluene and the like are used.
- a polymerization solvent for example, ethyl acetate, toluene and the like are used.
- the reaction is carried out under an inert gas stream such as nitrogen, and as a polymerization initiator, for example, 100 parts by weight of the total amount of monomers, azobisisobutyrate-tolyl 0.01 to 0.2 wt. Usually, it is carried out at about 50 to 70 ° C for about 8 to 30 hours.
- the polymerization initiator, chain transfer agent, emulsifier and the like used for radical polymerization are not particularly limited and can be appropriately selected and used.
- Examples of the polymerization initiator used in the present invention include 2, 2'-azobisisobutyl thiol, 2, 2, 1-azobis (2-amidinopropane) dihydrochloride, 2, 2, 1-azobis [2- (5-methyl-2-imidazoline-1-yl) propane] dihydrochloride, 2, 2, 1-azobis (2-methylpropionamidine) disulfate, 2, 2, -azobis (N, N , Monodimethylene sobutylamidine), 2, 2'-azobis [N- (2-carboxyethyl) -2-methylpropionamidine] hydrate (Wako Pure Chemical Industries, VA-057) Persulfates such as potassium persulfate, ammonium persulfate, di (2-ethylhexyl) peroxydicarbonate, di (4 tert-
- the polymerization initiator may be used alone or as a mixture of two or more. Power
- the total content is 0.005-1 to 100 parts by weight of the monomer. It is preferable that the amount is about parts by weight. More preferably, the amount is about 0.02 to 0.5 parts by weight.
- a chain transfer agent may be used in the polymerization.
- a chain transfer agent By using a chain transfer agent, the molecular weight of the acrylic polymer can be appropriately adjusted.
- chain transfer agent examples include lauryl mercabtan, glycidyl mercabtan, mercaptoacetic acid, 2-mercaptoethanol, thioglycolic acid, 2-ethylhexyl thiodalcholate, and 2,3 dimercapto 1 propanol. can give.
- chain transfer agents may be used alone or in admixture of two or more, but the total content is 0.01 to 100 parts by weight of monomer. ⁇ 0.1 part by weight.
- emulsifier used for emulsion polymerization include sodium lauryl sulfate, ammonium lauryl sulfate, sodium dodecylbenzenesulfonate, ammonium polyoxyethylene alkyl ether sulfate, polyoxyethylene alkylphenol.
- Nonionic emulsifiers such as ether emulsifiers such as sodium sulfate sulfate, polyoxyethylene alkyl ethers, polyoxyethylene alkyl phenol ethers, polyoxyethylene fatty acid esters, polyoxyethylene polyoxypropylene block polymers, etc. It is done. These emulsifiers may be used alone or in combination of two or more.
- reactive emulsifiers as emulsifiers into which radical polymerizable functional groups such as probe groups and aryl ether groups are introduced, specifically, for example, Aqualon HS-10, HS-20, KH- 10, BC-05, BC-10, BC-20 (all of which are manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd.), Adekaria Soap SE10N (Asahi Denki Soil).
- Reactive emulsifiers are preferable because they are incorporated into the polymer chain after polymerization and thus have improved water resistance.
- the amount of the emulsifier used is preferably 0.3 to 5 parts by weight with respect to 100 parts by weight of the monomer, and more preferably 0.5 to 1 part by weight from the viewpoint of polymerization stability and mechanical stability.
- the pressure-sensitive adhesive composition of the present invention uses the (meth) acrylic polymer as described above as a base polymer.
- the pressure-sensitive adhesive composition of the present invention is characterized by containing a peroxyacid compound and an isocyanate cross-linking agent.
- any radical active species can be appropriately used as long as it generates radical active species by heating or light irradiation to advance the crosslinking of the base polymer of the adhesive composition.
- peroxides with a 1-minute half-life temperature of 80 ° C to 160 ° C. Peracids with a temperature of 90 ° C to 140 ° C are preferred. It is better to use things. If the 1-minute half-life temperature is too low, the reaction may proceed during storage before coating and drying, and the viscosity may increase, making the coating impossible.On the other hand, if the 1-minute half-life temperature is too high, the bridge reaction may occur. Since the temperature of the solution increases, side reactions occur, and a large amount of unreacted peroxide remains, which may cause cross-linking over time.
- Examples of the peroxide compound used in the present invention include di (2-ethylhexyl) baroate.
- Xidicarbonate (1 minute half-life temperature: 90.6 ° C)
- Di (4-tert-butylcyclohexyl) baroxydicarbonate (1 minute half-life temperature: 92.1 ° C)
- G-sec butyl peroxide Carbonate (1 minute half-life temperature: 92.4 ° C)
- t-Butylperoxyneodecanoate (1 minute half-life temperature: 103.5 ° C
- t-hexyloxyxivalate (1 minute)
- Half-life temperature 109.
- the half-life of the peroxide is an index representing the decomposition rate of the peroxide, and indicates the time until the remaining amount of peroxide is halved.
- the decomposition temperature for obtaining a half-life at an arbitrary time and the half-life time at an arbitrary temperature are described in the manufacturer's catalog, for example, “Organic peroxides catalog of Nippon Oil & Fats Co., Ltd.” 9th edition (May 2003) ”.
- the peroxide may be used alone or as a mixture of two or more, but the total content is 100 parts by weight of the (meth) acrylic polymer. It is preferable to contain 0.02 to 2 parts by weight of the above-mentioned peroxide 0.04 to: more preferably 5 parts by weight of L 0.05 to 1 part by weight More preferably. If the amount is less than 0.02 parts by weight, the cross-linking may be insufficient and durability may be poor. On the other hand, if the amount exceeds 2 parts by weight, the cross-linking may be excessive and the adhesiveness may be poor.
- a peroxide when used as a polymerization initiator, it is possible to use the remaining peroxide for the crosslinking reaction without being used for the polymerization reaction. Amount It can be quantified, re-added as necessary, and used in a predetermined amount of peracid.
- Examples of the isocyanate crosslinking agent include aromatic isocyanates such as tolylene diisocyanate and xylene diisocyanate, alicyclic isocyanates such as isophorone diisocyanate, and hexamethylene diisocyanate. Examples include aliphatic isocyanates.
- lower aliphatic polyisocyanates such as butylene diisocyanate and hexamethylene diisocyanate, cyclopentylene diisocyanate, xylene diiso-hexane.
- Alicyclic isocyanates such as cyanate and isophorone diisocyanate, 2,4-tolylene diisocyanate, 4,4'-diphenylmethane diisocyanate, xylylene diisocyanate, polymethylene Aromatic diisocyanates such as polyisocyanate, trimethylolpropane Z-tolylene diisocyanate trimer adduct (trade name Coronate L, manufactured by Nippon Polyurethane Kogyo Co., Ltd.), trimethylolpropane / hexamethylene disorbate trimer Additives (made by Nippon Polyurethane Industry Co., Ltd., trade name Coronate HL), hexamethylene diisocyanate Isocyanurates (product name: Coronate HX, manufactured by Nippon Polyurethane Industry Co., Ltd.), isocyanates, polyether polyisocyanates, polyester polyisocyanates, and adducts of these with various polyols
- the isocyanate crosslinking agent may be used alone or in combination of two or more, but the total content is 100 parts by weight of the (meth) acrylic polymer. On the other hand, it is preferable to contain 0.02 to 2 parts by weight of the above-mentioned isocyanate chain cross-linking agent. It is more preferable to contain 0.04 to 1.5 parts by weight of 0.05 to 1 part by weight. To contain Further preferred. If the amount is less than 0.02 part by weight, the cohesive force may be insufficient. On the other hand, if the amount exceeds 2 parts by weight, the cross-linking may be excessive and the adhesion may be poor.
- the addition amount of the crosslinking agent (peroxide and isocyanate crosslinking agent) is adjusted so that the gel fraction of the crosslinked pressure-sensitive adhesive layer is 45 to 95% by weight. It is more preferable to adjust the addition amount of the cross-linking agent so that the addition amount of the cross-linking agent is more preferably 55 to 85% by weight so that it is preferably 50 to 90% by weight. .
- the gel fraction is less than 45% by weight, the cohesive force is lowered and the durability may be inferior.
- it exceeds 95% by weight the adhesiveness may be inferior.
- the gel fraction of the pressure-sensitive adhesive composition in the present invention means that after the dry weight W (g) of the pressure-sensitive adhesive layer is immersed in ethyl acetate, the insoluble content of the pressure-sensitive adhesive layer is taken out from the ethyl acetate, Measure the weight W (g) after drying, and calculate the value calculated as (w Zw) x 100 as the gel fraction (wt%
- W (g) (about 500 mg) was collected from the pressure-sensitive adhesive layer after crosslinking.
- the pressure-sensitive adhesive layer was immersed in ethyl acetate at about 23 ° C for 7 days, and then the pressure-sensitive adhesive layer was taken out and dried at 130 ° C for 2 hours. (g) was measured.
- the gel fraction (% by weight) was determined by applying W and W to the above formula.
- the adjustment of the crosslinking treatment temperature and the crosslinking treatment time is preferably set so that, for example, the decomposition amount of the peroxide contained in the pressure-sensitive adhesive composition is 50% by weight or more. It is more preferable to set the amount to be 70% by weight or more. If the peroxide decomposition amount is less than 50% by weight, the amount of peroxide remaining in the pressure-sensitive adhesive composition increases, and a cross-linking reaction with time may occur even after the cross-linking treatment.
- the decomposition amount of the peroxide is 50% by weight in 1 minute, and the decomposition amount of the peroxide in 75 minutes is 75%. %, And a cross-linking time of 1 minute or more is required.
- the excess at the crosslinking treatment temperature If the half-life (half-life) of the oxide is 30 seconds, a crosslinking treatment time of 30 seconds or more is required.
- the half-life (half-life) of the peroxide at the crosslinking treatment temperature is 5 If it is a minute, a cross-linking time of 5 minutes or more is required.
- the crosslinking treatment temperature and crosslinking treatment time can be calculated by theoretical calculation from the half-life (half-life time) assuming that the peroxide is linearly proportional to the peroxide used. Yes, the amount added can be adjusted as appropriate. On the other hand, the higher the temperature, the higher the possibility of side reactions, so the crosslinking treatment temperature is preferably 170 ° C or lower.
- the strong crosslinking treatment may be carried out at the temperature during the drying step of the pressure-sensitive adhesive layer! Alternatively, a separate crosslinking treatment step may be provided after the drying step.
- the crosslinking treatment time can be set in consideration of productivity and workability. Usually, it is about 0.2 to 20 minutes, and preferably about 0.5 to 10 minutes.
- a silane coupling agent can be used for the purpose of increasing adhesive strength and durability.
- known ones can be appropriately used without particular limitation.
- the silane coupling agent may be used alone or in combination of two or more, but the total content is 100 parts by weight of the (meth) acrylic polymer.
- the silane coupling agent is contained in an amount of 0.01 to 1 part by weight. More preferably, it contains 0.05 part by weight, and more preferably 3 parts by weight. If the amount is less than 01 parts by weight, the durability may be inferior. On the other hand, if the amount exceeds 1 part by weight, the adhesive force to an optical member such as a liquid crystal cell may increase excessively.
- the pressure-sensitive adhesive composition of the present invention may contain other known additives.
- powders such as colorants and pigments, dyes, surfactants, plasticizers, and adhesive properties.
- the pressure-sensitive adhesive composition of the present invention has the above-described configuration.
- the pressure-sensitive adhesive layer of the present invention is obtained by crosslinking the pressure-sensitive adhesive composition as described above. At that time, the pressure-sensitive adhesive composition is generally crosslinked after application of the pressure-sensitive adhesive composition.
- the pressure-sensitive adhesive layer having the strength of the pressure-sensitive adhesive composition after crosslinking can also be transferred to a support or the like.
- the method for forming the pressure-sensitive adhesive layer on the support is not particularly limited.
- the pressure-sensitive adhesive composition is applied to a release-treated separator, and the polymer solvent is dried.
- the pressure-sensitive adhesive layer is removed and transferred to the support, or the pressure-sensitive adhesive composition is applied to the support and the polymerization solvent is dried and removed to form the pressure-sensitive adhesive layer on the support.
- the composition contains at least one solvent other than the polymerization solvent so that it can be uniformly applied on the support. (Solvent) may be added.
- Examples of the support used in the present invention include plastic substrates such as polyethylene terephthalate (PET) and polyester film, porous materials such as paper and non-woven fabric, and optical members.
- plastic substrates such as polyethylene terephthalate (PET) and polyester film
- porous materials such as paper and non-woven fabric
- optical members optical members
- the plastic substrate is not particularly limited as long as it can be formed into a sheet or film.
- the thickness of the film is usually 4 to: LOO ⁇ m, preferably about 4 to 25 ⁇ m.
- plastic substrate if necessary, release with a silicone-based, fluorine-based, long-chain alkyl-based or fatty acid amide-based release agent, silica powder, antifouling treatment, acid treatment, alkane Anti-static treatment such as potash treatment, primer treatment, corona treatment, plasma treatment, ultraviolet treatment, coating type, kneading type, vapor deposition type and the like can also be performed.
- a silicone-based, fluorine-based, long-chain alkyl-based or fatty acid amide-based release agent silica powder, antifouling treatment, acid treatment, alkane Anti-static treatment such as potash treatment, primer treatment, corona treatment, plasma treatment, ultraviolet treatment, coating type, kneading type, vapor deposition type and the like can also be performed.
- Examples of the solvent used in the present invention include methyl ethyl ketone, acetone, ethyl acetate, tetrahydrofuran, dioxane, cyclohexanone, n-hexane, toluene, xylene, methanol, ethanol, n-propanol, Examples include isopropanol and water. These solvents can be used alone or in combination of two or more.
- a known method used for the production of pressure-sensitive adhesive sheets is used. Specifically, for example, roll coat, kiss roll coat, dara beer coat, reno lace coat, rhono le brush, spray coat, dip ronore coat, no ⁇ ; one coat, knife coat, air knife coat, curtain coat, lip Examples thereof include an extrusion coating method using a coater or a die coater.
- the pressure-sensitive adhesive layer of the present invention can be obtained by using a production method including a step of subjecting the resulting layer to a peroxide cross-linking treatment.
- the surface of the pressure-sensitive adhesive layer may be subjected to easy attachment treatment such as corona treatment or plasma treatment.
- easy attachment treatment such as corona treatment or plasma treatment.
- the pressure-sensitive adhesive layer may be protected with a sheet (release sheet, separator, release liner) subjected to release treatment until it is practically used. .
- Examples of the constituent material of the separator include plastic films such as polyethylene, polypropylene, polyethylene terephthalate, and polyester films, porous materials such as paper, cloth, and non-woven cloth, nets, foamed sheets, metal foils, and the like.
- plastic films such as polyethylene, polypropylene, polyethylene terephthalate, and polyester films
- porous materials such as paper, cloth, and non-woven cloth, nets, foamed sheets, metal foils, and the like.
- An appropriate thin leaf body such as a laminated body of the above-mentioned laminate can be used, but a point plastic film excellent in surface smoothness is preferably used.
- the plastic film is not particularly limited as long as it can protect the pressure-sensitive adhesive layer.
- a polyethylene film for example, a polyethylene film, a polypropylene film, a polybutene film, a polybutadiene film, a polymethylpentene film, and a polychlorinated butyl film.
- the thickness of the separator is usually about 5 to 200 ⁇ m, preferably about 5 to about LOO ⁇ m.
- An antistatic treatment such as a built-in type or a vapor deposition type can also be performed.
- a release treatment such as silicone treatment, long-chain alkyl treatment, or fluorine treatment, the peelability of the pressure-sensitive adhesive layer can be further enhanced.
- the release-treated sheet can be used as it is as a separator for pressure-sensitive adhesive sheets and optical members with pressure-sensitive adhesive, and the process can be simplified.
- the pressure-sensitive adhesive layer in the present invention is aged after the above pressure-sensitive adhesive composition has been subjected to the steps of coating, drying, crosslinking, and transfer by crosslinking the above-mentioned pressure-sensitive adhesive composition with the above-mentioned crosslinking agent and peroxide. Therefore, it is an adhesive layer with excellent productivity that can be punched and slitted quickly.
- the pressure-sensitive adhesive layer preferably has a thickness of 1 to 15 m, more preferably 1 to 12 / ⁇ ⁇ , and more preferably 1 to LO m. More preferably. Even when the pressure-sensitive adhesive layer of the present invention is thus made thinner than the conventional one, it does not float or peel off due to heat treatment or high-humidity treatment, and has excellent durability.
- the pressure-sensitive adhesive composition and pressure-sensitive adhesive layer of the present invention are particularly suitable for use as an optical member because they exhibit the above-described effects.
- the optical member with pressure-sensitive adhesive of the present invention is formed by forming a pressure-sensitive adhesive layer having the above configuration on one side or both sides of the optical member. Since the optical member with the pressure-sensitive adhesive of the present invention includes a pressure-sensitive adhesive layer that exhibits the above-described effects, even when the pressure-sensitive adhesive layer is thinned, heat treatment and high humidity are performed. It is excellent in durability with no lifting or peeling due to the treatment.
- optical member those used for forming an image display device such as a liquid crystal display device are used, and the type thereof is not particularly limited.
- examples of the optical member include a polarizing plate.
- the polarizing plate one having a transparent protective film on one side or both sides of a polarizer is generally used.
- the polarizer is not particularly limited, and various types can be used.
- polarizers include iodine and dichroic dyes in hydrophilic polymer films such as polybulal alcohol film, partially formalized polybulal alcohol film, and ethylene / acetate copolymer copolymer. Uniaxially stretched by adsorbing dichroic substances such as Polyethylene oriented films such as dehydrated nyl alcohol and dehydrochlorinated polyvinyl chloride.
- a polarizer that has a dichroic substance power such as a polybutyl alcohol film and iodine is preferable.
- the thickness of these polarizers is not particularly limited, but is generally about 5 to 80 m.
- a polarizer obtained by dyeing a polyvinyl alcohol film with iodine and uniaxially stretching it is prepared by, for example, dyeing polyvinyl alcohol by immersing it in an aqueous solution of iodine and stretching it 3 to 7 times the original length. Can do. If necessary, it may contain boric acid, zinc sulfate, zinc chloride or the like, and may be immersed in an aqueous solution of potassium iodide or the like. Furthermore, if necessary, the polybulal alcohol film may be immersed in water and washed before dyeing.
- Stretching may be performed after dyeing with iodine, or may be performed while dyeing, or may be stretched and dyed with strong iodine.
- the film can be stretched in an aqueous solution of boric acid or potassium iodide or in a water bath.
- polyester-based polymers such as polyethylene terephthalate and polyethylene naphthalate, cenorelose-based polymers such as dicetinoresenorelose and triacetinoresenorelose, acrylic polymers such as polymethylmetatalylate, polystyrene and atari mouth nitrile 'Styrene polymers such as styrene copolymers (AS resin), polycarbonate polymers, etc.
- An example of the polymer forming the transparent protective film is a blend of polymers.
- the transparent protective film can also be formed as a cured layer of a thermosetting or ultraviolet curable resin such as acrylic, urethane, acrylurethane, epoxy, or silicone.
- a polymer film described in JP-A-2001-343529 for example, (A) a thermoplastic resin having a substituted side chain and a Z or non-midamide group, and (B) side Examples thereof include a resin composition containing a thermoplastic resin having a substituted and Z-unsubstituted file and -tolyl group in the chain.
- a specific example is a film of a resin composition containing an alternating copolymer of isobutylene and N-methylmaleimide and an acrylonitrile / styrene copolymer.
- a film such as a mixed extruded product of a resin composition can be used.
- the thickness of the protective film can be appropriately determined, but is generally about 1 to 500 / ⁇ ⁇ in view of workability such as strength and handleability and thin layer properties. Especially 1 ⁇ 300 / ⁇ ⁇ is preferred, 5 ⁇ 200 111 is preferred 1 ⁇ 0
- nx-nz * d (where nx is the refractive index in the slow axis direction in the film plane, nz is the refractive index in the film thickness direction, and d is the film thickness).
- the value is -90 ⁇ !
- a protective film of ⁇ + 75 nm is preferably used.
- the thickness direction retardation value (Rth) is more preferably from 80 nm to +60 nm, and particularly preferably from 70 nm to +45 nm.
- the protective film is preferably a cellulosic polymer such as triacetyl cellulose from the viewpoint of polarization characteristics and durability.
- a triacetyl cellulose film is particularly suitable.
- protective films that have the same polymer material strength may be used on the front and back sides, or different polymer materials may be used.
- the polarizer and the protective film are usually adhered via an aqueous adhesive or the like.
- Water-based adhesives include isocyanate adhesives and polyvinyl alcohol Examples thereof include an adhesive, a gelatin adhesive, a vinyl latex, an aqueous polyurethane, and an aqueous polyester.
- the surface of the transparent protective film to which the polarizer is not bonded may be subjected to a hard coat layer, an antireflection treatment, an anti-sticking treatment, or a treatment for diffusion or anti-glare.
- the hard coat treatment is performed for the purpose of preventing scratches on the surface of the polarizing plate.
- curing with excellent UV hardness curable resin such as acrylic and silicone is excellent in hardness and sliding properties.
- the film can be formed by adding a film to the surface of the transparent protective film.
- the antireflection treatment is performed for the purpose of preventing reflection of external light on the surface of the polarizing plate, and can be achieved by forming an antireflection film or the like according to the conventional art.
- the anti-sticking treatment is performed for the purpose of preventing adhesion with an adjacent layer.
- Antiglare treatment is performed for the purpose of preventing external light from being reflected on the surface of the polarizing plate and obstructing the visibility of light transmitted through the polarizing plate. For example, roughing by a sandblasting method or an embossing method is used. It can be formed by imparting a fine concavo-convex structure to the surface of the transparent protective film by an appropriate method such as a surface method or a method of blending transparent fine particles. Examples of the fine particles to be included in the formation of the surface fine concavo-convex structure include silica, alumina, titanium, zirconium, tin oxide, indium oxide, and acid oxide having an average particle diameter of 0.5 to 50 ⁇ m.
- Transparent fine particles such as inorganic fine particles that may be conductive such as cadmium and antimony oxide, and organic fine particles such as crosslinked or uncrosslinked polymer are also used.
- the amount of fine particles used is generally about 2 to 50 parts by weight, preferably 5 to 25 parts by weight, based on 100 parts by weight of the transparent resin forming the surface fine uneven structure.
- the antiglare layer may also serve as a diffusion layer (viewing angle expanding function or the like) for diffusing the light transmitted through the polarizing plate to expand the viewing angle.
- the antireflection layer, the anti-sticking layer, the diffusion layer, the antiglare layer, and the like can be provided on the transparent protective film itself, or separately from the transparent protective film as an optical layer. It can also be provided.
- optical member of the present invention for example, a reflecting plate, a semi-transmissive plate, a retardation plate (1Z2 or
- optical layer that may be used for forming a device. These can be used alone as the optical member of the present invention, or can be laminated on the polarizing plate for practical use and used in one or more layers.
- a reflective polarizing plate or semi-transmissive polarizing plate in which a polarizing plate is further laminated with a reflective plate or a semi-transmissive reflective plate, and an elliptical polarizing plate or circular plate in which a retardation plate is further laminated on a polarizing plate.
- a polarizing plate, a wide viewing angle polarizing plate in which a viewing angle compensation film is further laminated on the polarizing plate, or a polarizing plate in which a brightness enhancement film is further laminated on the polarizing plate are preferable.
- a reflective polarizing plate is provided with a reflective layer on a polarizing plate, and is used to form a liquid crystal display device or the like that reflects incident light from the viewing side (display side).
- the reflective polarizing plate can be formed by an appropriate method such as a method in which a reflective layer having a force such as metal is attached to one side of the polarizing plate via a transparent protective layer, if necessary.
- a reflective layer is formed by attaching a foil vapor-deposited film made of a reflective metal such as aluminum on one side of a transparent protective film matted as necessary.
- the transparent protective film may contain fine particles to form a surface fine uneven structure, and a reflective layer having a fine uneven structure thereon.
- the reflective layer having the fine concavo-convex structure has advantages such as that the incident light is diffused by irregular reflection to prevent the glaring appearance and to suppress unevenness in brightness and darkness.
- the transparent protective film containing fine particles also has an advantage that incident light and its reflected light are diffused when passing through it and light and dark unevenness can be further suppressed.
- the reflective layer of the fine concavo-convex structure reflecting the surface fine concavo-convex structure of the transparent protective film is formed by an appropriate method such as a vacuum deposition method, an ion plating method, a sputtering method, or a vapor deposition method. This can be done by attaching a metal directly to the surface of the transparent protective layer.
- the reflective plate can be used as a reflective sheet in which a reflective layer is provided on an appropriate film according to the transparent film, instead of directly applying to the transparent protective film of the polarizing plate.
- the reflective layer usually has a metallic force, so the reflective surface is transparent protective film. It is preferable to use it in a state where it is covered with a polarizing plate, for example, in order to prevent a decrease in reflectivity due to oxidation, in order to maintain the initial reflectivity for a long period of time, and to avoid the separate provision of a protective layer.
- the transflective polarizing plate can be obtained by using a transflective reflective layer such as a half mirror that reflects and transmits light in the reflective layer.
- a transflective polarizing plate is usually provided on the back side of a liquid crystal cell.
- the liquid crystal display device of the type that displays the image using the built-in light source such as the backlight that is built in the back side of the transflective polarizing plate can be formed.
- the transflective polarizing plate can save energy for using a light source such as a backlight in a bright atmosphere.
- a phase difference plate or the like is used when changing linearly polarized light into elliptically or circularly polarized light, changing elliptically or circularly polarized light into linearly polarized light, or changing the polarization direction of linearly polarized light.
- a so-called 1Z4 wavelength plate also called a ⁇ 4 plate
- a 1Z2 wavelength plate (also referred to as ⁇ 2 plate) is usually used to change the polarization direction of linearly polarized light.
- the elliptically polarizing plate compensates (prevents) the coloring (blue or yellow) caused by double bending of the liquid crystal layer of the super twist nematic (STN) type liquid crystal display device, and displays the above-mentioned coloring! It is used effectively in some cases. Further, the one having a controlled three-dimensional refractive index is preferable because it can compensate (prevent) coloring that occurs when the screen of the liquid crystal display device is viewed from an oblique direction.
- the circularly polarizing plate is effectively used, for example, when adjusting the color tone of an image of a reflective liquid crystal display device in which the image is displayed in color, and also has an antireflection function.
- Examples of the retardation plate include a birefringent film obtained by uniaxially or biaxially stretching a polymer material, a liquid crystal polymer alignment film, and a liquid crystal polymer alignment layer supported by the film. It is done.
- the thickness of the retardation plate is not particularly limited, but is generally about 20 to 150 / ⁇ ⁇ .
- polymer material examples include polybutyl alcohol, polybutyl butyral, polymethylbinole ether, polyhydroxy ethino rare tallylate, hydroxy ethinore cellulose, hydroxypropyl cellulose, methenorescenellose, polycarbonate, poly Allylate, Polysulfone, Polyethylene terephthalate, Polyethylene naphthalate, Polyetherolsulfone, Polyphenylene sulfide, Polyphenylene oxide, Polyallylsulfone, Polyvinyl alcohol, Polyamide, Polyimide, Polyolefin, Polyvinyl chloride, Cellulose polymer, Examples thereof include norbornene-based resin, and binary and ternary copolymers, graft copolymers and blends thereof. These polymer materials become oriented materials (stretched films) by stretching or the like.
- liquid crystalline polymer examples include conjugated linear atomic groups that impart liquid crystal alignment.
- Examples thereof include various main chain types and side chain types in which (mesogen) is introduced into the main chain or side chain of the polymer.
- Specific examples of the main chain type liquid crystalline polymer include a structure in which a mesogenic group is bonded to a bendable spacer portion, for example, a nematic-oriented polyester liquid crystalline polymer, a discotic polymer or a cholesteric polymer.
- Specific examples of side-chain liquid crystalline polymers include polysiloxane, polyacrylate, polymethacrylate, or polymalonate as the main chain skeleton, and nematic alignment imparted through a spacer portion consisting of conjugated atomic groups as side chains.
- liquid crystalline polymers are, for example, liquid crystalline on the alignment-treated surface such as those obtained by rubbing the surface of a thin film such as polyimide polypolyalcohol formed on a glass plate and obliquely vapor deposited silicon oxide. This is done by spreading a polymer solution and heat-treating it.
- the retardation plate may have an appropriate retardation according to the purpose of use, such as for the purpose of compensating for various wavelength plates and birefringence of the liquid crystal layer, compensation of viewing angle, and the like.
- Two or more kinds of retardation plates may be laminated to control optical characteristics such as retardation.
- the elliptically polarizing plate and the reflective elliptical polarizing plate are obtained by laminating a polarizing plate or a reflective polarizing plate and a retardation plate in an appropriate combination.
- the elliptical polarizing plates that can be produced are (reflective) polarizing plates and retardation plates that are separated in order in the manufacturing process of the liquid crystal display device. Force that can be formed even by laminating individual pieces.
- optical members such as elliptically polarizing plates are superior in terms of quality stability, lamination workability, etc., and manufacturing liquid crystal display devices and the like. There is an advantage that the efficiency can be improved.
- the viewing angle compensation film is a film for widening the viewing angle so that the image can be seen relatively clearly even when the screen of the liquid crystal display device is viewed in a slightly oblique direction rather than perpendicular to the screen.
- a viewing angle compensating retardation plate include a retardation plate, an alignment film such as a liquid crystal polymer, and a support in which an alignment layer such as a liquid crystal polymer is supported on a transparent substrate.
- a normal retardation plate uses a birefringent polymer film uniaxially stretched in the plane direction, whereas a retardation plate used as a viewing angle compensation film is biaxially stretched in the plane direction.
- Birefringent polymer films biaxially stretched films such as polymer films and birefringent films that have birefringence with a controlled refractive index in the thickness direction, uniaxially stretched in the plane direction and stretched in the thickness direction Etc. are used.
- the tilted alignment film include a heat-shrinkable film adhered to the polymer film and the polymer film stretched or Z and contracted under the action of the shrinkage force caused by heating, or the liquid crystal polymer was obliquely aligned. Stuff.
- the raw material polymer for the phase difference plate is the same as the polymer described in the previous phase difference plate, which prevents coloration due to a change in the viewing angle based on the phase difference of the liquid crystal cell and has a good viewing angle. An appropriate one for the purpose of enlargement can be used.
- a liquid crystal polymer alignment layer is supported by a triacetylcellulose film in order to achieve a wide viewing angle with good visibility.
- the optically compensated retardation plate can be preferably used.
- a polarizing plate obtained by bonding a polarizing plate and a brightness enhancement film is usually provided on the back side of a liquid crystal cell.
- the brightness enhancement film reflects the linearly polarized light with a predetermined polarization axis or circularly polarized light in a predetermined direction when natural light is incident due to a backlight of a liquid crystal display device or the like, or reflection from the back side, and transmits other light.
- a polarizing plate in which a brightness enhancement film is laminated with a polarizing plate allows light from a light source such as a backlight to be incident to obtain transmitted light in a predetermined polarization state, and reflects light without transmitting the light other than the predetermined polarization state. Is done.
- the light reflected by the brightness enhancement film surface is further reflected via a reflective layer provided on the rear side.
- the light is re-incident on the brightness enhancement film, and part or all of the light is transmitted as light in a predetermined polarization state to increase the amount of light transmitted through the brightness enhancement film, while supplying polarized light that is difficult to be absorbed by the polarizer.
- Luminance can be improved by increasing the amount of light that can be used for liquid crystal display image display. In other words, when light is incident through the backside force polarizer of a liquid crystal cell with a backlight or the like without using a brightness enhancement film, almost no light has a polarization direction that does not coincide with the polarization axis of the polarizer.
- the brightness enhancement film allows light having a polarization direction that is absorbed by the polarizer to be reflected once by the brightness enhancement film without being incident on the polarizer, and further through a reflective layer provided on the back side thereof. Inverting and re-entering the brightness enhancement film is repeated, and only the polarized light whose polarization direction is such that the polarization direction of the light reflected and reversed between the two passes through the polarizer is used. Is transmitted to the polarizer, so that light such as knock light can be used efficiently for displaying images on the liquid crystal display device, and the screen can be brightened.
- a diffusion plate may be provided between the brightness enhancement film and the reflective layer.
- Luminance enhancement The polarized light reflected by the film is directed to the reflective layer, etc., but the installed diffuser plate diffuses the light passing therethrough at the same time and simultaneously cancels the polarized state, resulting in a non-polarized state. That is, the diffuser plate returns the polarized light to the original natural light state.
- This non-polarized state that is, the light in the natural light state is directed to the reflection layer and the like, reflected through the reflection layer, etc., and again passes through the diffusion plate and reenters the brightness enhancement film.
- the unevenness of the brightness of the display screen is reduced at the same time.
- a uniform and bright screen can be provided.
- the brightness enhancement film may be a film that transmits linearly polarized light having a predetermined polarization axis such as a dielectric multilayer thin film or a multilayer laminate of thin film films having different refractive index anisotropies.
- the light of this type reflects light, reflects either the left-handed or the right-handed circularly polarized light, such as an oriented film of cholesteric liquid crystal polymer or the oriented liquid crystal layer supported on the film substrate, and the other. It is possible to use appropriate light, such as light that exhibits the property of transmitting light.
- the transmission light is directly incident on the polarizing plate with the polarization axis aligned, thereby suppressing absorption loss due to the polarizing plate. While allowing efficient transmission.
- a brightness-enhancement film of a type that emits circularly polarized light such as a cholesteric liquid crystal layer, can be directly incident on a polarizer, but the circularly polarized light is converted into linearly polarized light through a retardation plate in order to suppress absorption loss. It is preferably incident on the polarizing plate. Note that circularly polarized light can be converted to linearly polarized light by using a 1Z4 wavelength plate as the retardation plate.
- a retardation plate that functions as a 1Z4 wavelength plate in a wide wavelength range such as a visible light castle exhibits, for example, a retardation layer that functions as a 1Z4 wavelength plate and other retardation characteristics for light light having a wavelength of 550 nm. It can be obtained by a method of superposing a retardation layer, for example, a retardation layer functioning as a 1Z2 wavelength plate. Therefore, the retardation plate disposed between the polarizing plate and the brightness enhancement film may be one or more retardation layers.
- the cholesteric liquid crystal layer also reflects circularly polarized light in a wide wavelength range such as the visible light region by combining two or more layers with different reflection wavelengths in an overlapping structure. Based on this, it is possible to obtain transmitted circularly polarized light in a wide wavelength range.
- the polarizing plate may be formed by laminating a polarizing plate such as the above-described polarization-separating polarizing plate and two or more optical layers. Therefore, it may be a reflective elliptical polarizing plate or a semi-transmissive elliptical polarizing plate in which the above-mentioned reflective polarizing plate or semi-transmissive polarizing plate is combined with a retardation plate.
- An optical member in which the optical layer is laminated on a polarizing plate can be formed even in a method of laminating sequentially in a manufacturing process of a liquid crystal display device or the like. In addition, it has excellent quality stability and assembly work, and has the advantage of improving the manufacturing process of liquid crystal display devices.
- Appropriate bonding means such as a pressure-sensitive adhesive layer are used for lamination. Can be used. When adhering the polarizing plate and the other optical layer, their optical axes can be set at an appropriate arrangement angle in accordance with the desired retardation characteristics.
- the optical member of the optical member with pressure-sensitive adhesive of the present invention includes, for example, a salicylic acid ester compound, a benzophenol compound, a benzotriazole compound, a cyanoacrylate compound, It may be one that has UV absorbing ability by a method such as a method of treating with a UV absorber such as a nickel complex salt compound.
- the optical member with a pressure-sensitive adhesive of the present invention can be preferably used for forming various image display devices such as a liquid crystal display device.
- the liquid crystal display device can be formed according to conventional methods. That is, a liquid crystal display device is generally formed by appropriately assembling components such as a liquid crystal cell, an optical member with an adhesive, and an illumination system as necessary, and incorporating a drive circuit. The method can be based on the conventional method with no particular limitation except that the optical member according to the present invention is used.
- the liquid crystal cell for example, any type such as a TN type, STN type, or ⁇ type can be used.
- an appropriate liquid crystal display device such as a liquid crystal display device in which an optical member with an adhesive is disposed on one side or both sides of a liquid crystal cell, or a backlight in a lighting system or a reflector. it can.
- the optical member according to the present invention can be installed on one side or both sides of the liquid crystal cell.
- optical members are provided on both sides, they may be the same or different.
- a single layer or a suitable part such as a diffusion plate, an antiglare layer, an antireflection film, a protective plate, a prism array, a lens array sheet, a light diffusion plate, a knocklight, etc. Two or more layers can be arranged.
- an organic electroluminescence device (organic EL display device)
- an organic EL display device is formed by sequentially laminating a transparent electrode, an organic light emitting layer, and a metal electrode on a transparent substrate to form a light emitting body (organic electroluminescent light emitting body).
- the organic light emitting layer is a laminate of various organic thin films. For example, a layered body of a hole injection layer made of a triphenylamine derivative and a light emitting layer having a fluorescent organic solid force such as anthracene.
- a stack of such a light-emitting layer and a powerful electron injection layer such as a perylene derivative Structures having various combinations such as a body and / or a laminate of these hole injection layer, light emitting layer, and electron injection layer are known.
- an organic EL display device holes and electrons are injected into an organic light emitting layer by applying a voltage to a transparent electrode and a metal electrode, and energy generated by recombination of these holes and electrons. Emits light on the principle that it excites the fluorescent material and emits light when the excited fluorescent material returns to the ground state.
- the mechanism of recombination in the middle is the same as that of a general diode, and as can be expected from this, the current and emission intensity show strong nonlinearity with rectification with respect to the applied voltage.
- an organic EL display device in order to extract light emitted from the organic light emitting layer, at least one of the electrodes must be transparent, and is usually formed of a transparent conductor such as indium tin oxide (ITO).
- ITO indium tin oxide
- a transparent electrode is used as the anode.
- metal electrodes such as Mg Ag and A1-Li are used.
- the organic light emitting layer is formed of a very thin film with a thickness of about lOnm. For this reason, the organic light emitting layer transmits light almost completely like the transparent electrode. As a result, light that is incident on the surface of the transparent substrate when not emitting light, passes through the transparent electrode and the organic light emitting layer, and is reflected by the metal electrode again returns to the surface side of the transparent substrate. When viewed, the display surface of the OLED display looks like a mirror.
- an organic EL display device including an organic electroluminescent light emitting device including a transparent electrode on a front surface side of an organic light emitting layer that emits light when voltage is applied and a metal electrode on a back surface side of the organic light emitting layer
- a polarizing plate can be provided on the surface side of the electrode, and a retardation plate can be provided between the transparent electrode and the polarizing plate.
- the retardation plate and the polarizing plate have a function of polarizing light incident from the outside and reflected by the metal electrode, the effect of preventing the mirror surface of the metal electrode from being visually recognized by the polarization action. is there.
- the retardation plate is a 1Z4 wavelength plate and the angle between the polarization directions of the polarizing plate and the retardation plate is adjusted to ⁇ Z4, the mirror surface of the metal electrode can be completely shielded.
- the external light incident on the organic EL display device is linearly polarized by the polarizing plate. Only transparent.
- This linearly polarized light is generally elliptically polarized by the retardation plate, but it is circularly polarized when the retardation plate is a 1Z4 wavelength plate and the angle between the polarization direction of the polarizing plate and the retardation plate is ⁇ ⁇ 4. .
- This circularly polarized light is transmitted through the transparent substrate, the transparent electrode, and the organic thin film, is reflected by the metal electrode, is again transmitted through the organic thin film, the transparent electrode, and the transparent substrate, and is linearly polarized again on the retardation plate. Become. And since this linearly polarized light is orthogonal to the polarization direction of the polarizing plate, it cannot be transmitted through the polarizing plate. As a result, the mirror surface of the metal electrode can be completely shielded.
- the surface of the optical member may be subjected to easy attachment treatment such as corona treatment or plasma treatment, or undercoating treatment. Good.
- the image display device of the present invention is a liquid crystal display device, an organic EL display device, a PDP or the like using the above-mentioned optical member with an adhesive, and even when the adhesive layer is thinned. It has the function of exhibiting high durability that does not float or peel off by heat treatment or high-humidity treatment.
- the weight average molecular weight of the obtained (meth) acrylic polymer was measured by GPC (gel “permeation” chromatography).
- the molecular weight was calculated in terms of polystyrene.
- the weight fraction (Area%) with a molecular weight of 100,000 or less was calculated from the GPC measurement result using the above data processor. At this time, the monomer component was strong.
- the amount of peroxide decomposition after the thermal decomposition treatment was measured by HPLC (high performance liquid chromatography). Specifically, about 0.2 g each of the pressure-sensitive adhesive composition before and after the decomposition treatment was taken out, immersed in 10 ml of ethyl acetate, extracted by shaking at 120 rpm at 25 ° C for 3 hours with a shaker, The mixture was allowed to stand at room temperature for 3 days. Next, hold 10 ml of acetonitrile, shake at 30 ° C. for 30 minutes at 25 ° C, and inject about 10 1 of the extract obtained by filtration through a membrane filter (0.45 ⁇ m) into the HPLC for analysis. The decrease in the amount of peroxide before and after the decomposition treatment was taken as the amount of peroxide decomposition.
- Example ⁇ The pressure-sensitive adhesive layer prepared in Comparative Example (about 0.1 lg) was taken out and immersed in ethyl acetate at room temperature (about 25 ° C) for 1 week. Then, the pressure-sensitive adhesive layer (insoluble matter) that had been soaked in was taken out of ethyl acetate, measured for weight W g after drying at 130 ° C for 2 hours, and (W / W) X 1
- the pressure-sensitive adhesive polarizing plate (25 mm in width) obtained in Examples and Comparative Examples was attached to a retardation film CiSR, norbornene-based film, Arton) by reciprocating 1 roll with a 2 kg roller. Thereafter, the film was treated in an autoclave at 50 ° C. and 0.5 MPa for 30 minutes, and then left for 3 hours in an atmosphere of 23 ° C. ⁇ 50% RH. Then, the peel adhesive strength was measured at a peel angle of 180 ° and a peel speed of 300 mmZmin.
- the acrylic polymer (a2) had a weight average molecular weight of 1.8 million.
- the acrylic polymer (a7) had a weight average molecular weight of 1.98 million.
- a polyisocyanate-based crosslinking agent (manufactured by Nippon Polyurethane Industry Co., Ltd., Coronate L), which also has a trimethylolpropane addition power of trilendiisocyanate as a crosslinking agent, with respect to 100 parts by weight of the solid content of the acrylic polymer (b) solution. )
- An acrylic pressure-sensitive adhesive solution (b) containing 0.6 part by weight was prepared.
- the acrylic adhesive solution (b) was applied to one side of a polyethylene-terephthalate (PET) film (Mitsubishi Chemical Polyester Film Co., Ltd., thickness: 38 m) subjected to silicone treatment. Then, drying was performed at 130 ° C for 3 minutes to form an adhesive layer (B) having a thickness of 20 m after drying.
- PET polyethylene-terephthalate
- the pressure-sensitive adhesive layer (B) was transferred to a retardation film (manufactured by JSR, norbornene-based film, Arton) to prepare a retardation film with a pressure-sensitive adhesive layer (B).
- Dibenzoyl peroxide (1 minute half-life: 130 ° C) 0.15 parts by weight as a cross-linking agent with respect to 100 parts by weight of the solid content of the acrylic polymer (al) solution, and tolylene diisocyanate
- the acrylic pressure-sensitive adhesive solution (1) was applied to one side of a polyethylene-terephthalate (PET) film (Mitsubishi Chemical Polyester Film Co., Ltd., thickness: 38 m) subjected to silicone treatment. Drying was carried out at ° C for 3 minutes. Crosslinking treatment was carried out to form an adhesive layer (A1) having a thickness of 5 m after drying. At this time, the gel fraction of the pressure-sensitive adhesive layer (A1) was 80% by weight, and the decomposition amount of the peroxyacid residue after drying was 88% by weight.
- PET polyethylene-terephthalate
- the pressure-sensitive adhesive layer (A1) was transferred to a polarizing plate (manufactured by Nitto Denko Corporation, SEG5224DU) to prepare a polarizing plate with a pressure-sensitive adhesive layer (A1).
- the pressure-sensitive adhesive layer surface of the polarizing plate with the pressure-sensitive adhesive layer (A1) is laminated on the surface opposite to the pressure-sensitive adhesive layer (B) of the phase difference film with the pressure-sensitive adhesive layer (B), and A laminated sample was produced.
- the acrylic adhesive solution (2) was applied to one side of a silicone-treated polyethylene terephthalate (PET) film (Mitsubishi Chemical Polyester Film Co., Ltd., thickness: 38 m). Drying at 150 ° C for 3 minutes. Crosslinking treatment was performed to form an adhesive layer (A2) having a thickness of 5 m after drying. At this time, the gel fraction of the pressure-sensitive adhesive layer (A2) was 81% by weight, and the decomposition amount of the peroxyacid residue after drying was 89% by weight.
- PET polyethylene terephthalate
- the pressure-sensitive adhesive layer (A2) was transferred to a polarizing plate (manufactured by Nitto Denko Corporation, SEG5224DU) to prepare a polarizing plate with a pressure-sensitive adhesive layer (A2). [0199] (Preparation of laminated sample)
- the pressure-sensitive adhesive layer surface of the polarizing plate with the pressure-sensitive adhesive layer (A2) is laminated on the surface opposite to the pressure-sensitive adhesive layer (B) of the retardation film with the pressure-sensitive adhesive layer (B) prepared in Example 1, and the polarizing plate A laminated sample of a phase difference film was prepared.
- the acrylic pressure-sensitive adhesive solution (3) was applied to one side of a silicone-treated polyethylene terephthalate (PET) film (Mitsubishi Chemical Polyester Film Co., Ltd., thickness: 38 m). Drying at 150 ° C for 3 minutes. Crosslinking treatment was performed to form an adhesive layer (A3) having a thickness of 5 m after drying. At this time, the gel fraction of the pressure-sensitive adhesive layer (A3) was 83% by weight, and the decomposition amount of the peroxyacid residue after drying was 91% by weight.
- PET polyethylene terephthalate
- the pressure-sensitive adhesive layer (A3) was transferred to a polarizing plate (manufactured by Nitto Denko Corporation, SEG5224DU) to prepare a polarizing plate with a pressure-sensitive adhesive layer (A3).
- the pressure-sensitive adhesive layer surface of the polarizing plate with the pressure-sensitive adhesive layer (A3) was laminated on the surface opposite to the pressure-sensitive adhesive layer (B) of the pressure-sensitive adhesive layer with the pressure-sensitive adhesive layer (B) prepared in Example 1, and the polarizing plate A laminated sample of a phase difference film was prepared.
- Acrylic adhesive solution (4) For 100 parts by weight of the solid content of the acrylic polymer (a3) solution, 0.15 parts by weight of dibenzoyl peroxide (1 minute half-life: 130 ° C) as a cross-linking agent, and tolylene diisocyanate Acrylic adhesive solution (4) containing 0.6 parts by weight of a polyisocyanate-based cross-linking agent (Nippon Polyurethane Industry Co., Ltd., Coronate L) that also has the ability to add methylolpropane. It was adjusted.
- a polyisocyanate-based cross-linking agent Nippon Polyurethane Industry Co., Ltd., Coronate L
- the acrylic pressure-sensitive adhesive solution (4) was applied to one side of a silicone-treated polyethylene terephthalate (PET) film (Mitsubishi Chemical Polyester Film Co., Ltd., thickness: 38 m). Drying at 150 ° C for 3 minutes. Crosslinking was performed to form an adhesive layer (A4) with a thickness of 5 m after drying. Further, the gel fraction is 82 wt 0/0 of the adhesive layer at this time (A4), the amount of decomposition of the peracid I ⁇ after drying was 89 wt%.
- PET polyethylene terephthalate
- the pressure-sensitive adhesive layer (A4) was transferred to a polarizing plate (manufactured by Nitto Denko Corporation, SEG5224DU) to prepare a polarizing plate with a pressure-sensitive adhesive layer (A4).
- the pressure-sensitive adhesive layer surface of the polarizing plate with the pressure-sensitive adhesive layer (A4) is laminated on the surface opposite to the pressure-sensitive adhesive layer (B) of the pressure-sensitive adhesive layer with the pressure-sensitive adhesive layer (B) prepared in Example 1, and the polarizing plate A laminated sample of a phase difference film was prepared.
- the acrylic pressure-sensitive adhesive solution (5) was applied to one side of a silicone-treated polyethylene terephthalate (PET) film (Mitsubishi Chemical Polyester Film Co., Ltd., thickness: 38 m). Drying at 150 ° C for 3 minutes. Crosslinking treatment was performed to form an adhesive layer (A5) with a thickness of 5 m after drying. At this time, the gel fraction of the pressure-sensitive adhesive layer (A5) was 76% by weight, and the decomposition amount of the peroxyacid residue after drying was 84% by weight.
- PET polyethylene terephthalate
- the pressure-sensitive adhesive layer (A5) was transferred to a polarizing plate (manufactured by Nitto Denko Corporation, SEG5224DU) to prepare a polarizing plate with a pressure-sensitive adhesive layer (A5).
- the pressure-sensitive adhesive layer of the polarizing plate with the pressure-sensitive adhesive layer (A5), the pressure-sensitive adhesive layer produced in Example 1 (B) A laminate sample of a polarizing plate and a retardation film was prepared by laminating on the surface opposite to the pressure-sensitive adhesive layer (B) of the phase difference film with (B).
- the acrylic pressure-sensitive adhesive solution (6) was applied to one side of a silicone-treated polyethylene terephthalate (PET) film (Mitsubishi Chemical Polyester Film Co., Ltd., thickness: 38 m). Drying at 150 ° C for 3 minutes. Crosslinking treatment was performed to form an adhesive layer (A6) with a thickness of 5 m after drying. At this time, the gel fraction of the pressure-sensitive adhesive layer (A6) was 85% by weight, and the decomposition amount of the peroxide after drying was 83% by weight.
- PET polyethylene terephthalate
- the pressure-sensitive adhesive layer (A6) was transferred to a polarizing plate (manufactured by Nitto Denko Corporation, SEG5224DU) to prepare a polarizing plate with a pressure-sensitive adhesive layer (A6).
- the pressure-sensitive adhesive layer surface of the polarizing plate with the pressure-sensitive adhesive layer (A6) was laminated on the surface opposite to the pressure-sensitive adhesive layer (B) of the pressure-sensitive adhesive layer with the pressure-sensitive adhesive layer (B) prepared in Example 1, and the polarizing plate A laminated sample of a phase difference film was prepared.
- the acrylic pressure-sensitive adhesive solution (7) was subjected to silicone treatment with It is applied to one side of a phthalate (PET) film (Mitsubishi Chemical Polyester Film Co., Ltd., thickness: 38 m), dried at 150 ° C for 3 minutes, cross-linked, and 5 m thick after drying.
- An agent layer (A7) was formed.
- the gel fraction of the pressure-sensitive adhesive layer (A7) was 82% by weight, and the decomposition amount of the peroxyacid residue after drying was 89% by weight.
- the pressure-sensitive adhesive layer (A7) was transferred to a polarizing plate (manufactured by Nitto Denko Corporation, SEG5224DU) to prepare a polarizing plate with a pressure-sensitive adhesive layer (A7).
- An acrylic pressure-sensitive adhesive solution (8) was prepared by the same method as in Comparative Example 1 except that the above dibenzoyl peroxide was used.
- the acrylic pressure-sensitive adhesive solution (8) was applied to one side of a silicone-treated polyethylene terephthalate (PET) film (Mitsubishi Chemical Polyester Film Co., Ltd., thickness: 38 m). Drying at 150 ° C for 3 minutes. Crosslinking treatment was performed to form an adhesive layer (A8) having a thickness of 5 m after drying. At this time, the gel fraction of the pressure-sensitive adhesive layer (A8) is 76% by weight.
- PET polyethylene terephthalate
- the pressure-sensitive adhesive layer (A8) was transferred to a polarizing plate (manufactured by Nitto Denko Corporation, SEG5224DU) to prepare a polarizing plate with a pressure-sensitive adhesive layer (A8).
- the pressure-sensitive adhesive layer surface of the polarizing plate with the pressure-sensitive adhesive layer (A8) is laminated on the surface opposite to the pressure-sensitive adhesive layer (B) of the pressure-sensitive adhesive layer with the pressure-sensitive adhesive layer (B) prepared in Example 1, and the polarizing plate A laminated sample of a phase difference film was prepared.
- the acrylic pressure-sensitive adhesive solution (9) was applied to one side of a silicone-treated polyethylene terephthalate (PET) film (Mitsubishi Chemical Polyester Film Co., Ltd., thickness: 38 m). Drying at 150 ° C for 3 minutes. Crosslinking treatment was performed to form an adhesive layer (A9) having a thickness of 5 m after drying. At this time, the gel fraction of the pressure-sensitive adhesive layer (A9) was 85% by weight, and the decomposition amount of the peroxyacid residue after drying was 92% by weight.
- PET polyethylene terephthalate
- the pressure-sensitive adhesive layer (A9) was transferred to a polarizing plate (manufactured by Nitto Denko Corporation, SEG5224DU) to prepare a polarizing plate with a pressure-sensitive adhesive layer (A9).
- the pressure-sensitive adhesive layer surface of the pressure-sensitive adhesive layer (A9) polarizing plate is laminated on the surface opposite to the pressure-sensitive adhesive layer (B) of the pressure-sensitive adhesive layer (B) prepared in Example 1, and the polarizing plate A laminated sample of a phase difference film was prepared.
- An acrylic pressure-sensitive adhesive solution (10) was prepared in the same manner as in Example 2 except that the above dibenzoyl peroxide was used.
- the acrylic pressure-sensitive adhesive solution (10) was applied to one side of a polyethylene-terephthalate (PET) film (Mitsubishi Chemical Polyester Film Co., Ltd., thickness: 38 m) subjected to silicone treatment. Drying at 150 ° C for 3 minutes. Crosslinking treatment was performed to form an adhesive layer (A10) having a thickness of 5 m after drying. The gel fraction of the pressure-sensitive adhesive layer (A10) at this time was 70% by weight.
- PET polyethylene-terephthalate
- the pressure-sensitive adhesive layer (A10) was transferred to a polarizing plate (manufactured by Nitto Denko Corporation, SEG5224DU) to produce a polarizing plate with a pressure-sensitive adhesive layer (A10).
- the pressure-sensitive adhesive layer of the polarizing plate with the pressure-sensitive adhesive layer (A10), the pressure-sensitive adhesive prepared in Example 1 Lamination was performed on the surface opposite to the pressure-sensitive adhesive layer (B) of the retardation film with the layer (B) to prepare a laminated sample of the polarizing plate and the retardation film.
- An acrylic adhesive solution (11) was prepared in the same manner as in Example 2, except that the polyisocyanate crosslinking agent having the trimethylolpropane adduct strength of the tolylene diisocyanate was not used.
- the acrylic pressure-sensitive adhesive solution (11) was applied to one side of a polyethylene-terephthalate (PET) film (Mitsubishi Chemical Polyester Film Co., Ltd., thickness: 38 m) subjected to silicone treatment. Drying at 150 ° C for 3 minutes. Crosslinking treatment was performed to form an adhesive layer (Al l) having a thickness of 5 m after drying. At this time, the gel fraction of the pressure-sensitive adhesive layer (Al 1) was 72% by weight, and the decomposition amount of the peroxide after drying was 84% by weight.
- PET polyethylene-terephthalate
- the pressure-sensitive adhesive layer (Al1) was transferred to a polarizing plate (manufactured by Nitto Denko Corporation, SEG5224DU) to prepare a polarizing plate with a pressure-sensitive adhesive layer (All).
- the surface of the pressure-sensitive adhesive layer of the polarizing plate with the pressure-sensitive adhesive layer (Al l) is laminated on the surface opposite to the pressure-sensitive adhesive layer (B) of the phase difference film with the pressure-sensitive adhesive layer (B) prepared in Example 1, A laminate sample of a plate and a retardation film was produced.
- the pressure-sensitive adhesive layer of the present invention exhibits excellent pressure-sensitive adhesive properties. In particular, even when the pressure-sensitive adhesive layer is thinned, it does not float or peel off due to heat treatment or high-humidity treatment. It can be seen that it has excellent durability.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Polarising Elements (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Liquid Crystal (AREA)
- Adhesive Tapes (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/090,159 US8399090B2 (en) | 2005-10-18 | 2006-10-17 | Pressure-sensitive adhesive composition, pressure-sensitive adhesive layer, process for producing the pressure-sensitive adhesive layer, and optical member with pressure-sensitive adhesive |
CN2006800376422A CN101283069B (zh) | 2005-10-18 | 2006-10-17 | 粘合剂组合物、粘合剂层及其制造方法以及带有粘合剂的光学构件 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2005302974 | 2005-10-18 | ||
JP2005-302974 | 2005-10-18 |
Publications (1)
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WO2007046365A1 true WO2007046365A1 (ja) | 2007-04-26 |
Family
ID=37962458
Family Applications (1)
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PCT/JP2006/320634 WO2007046365A1 (ja) | 2005-10-18 | 2006-10-17 | 粘着剤組成物、粘着剤層およびその製造方法、ならびに粘着剤付光学部材 |
Country Status (6)
Country | Link |
---|---|
US (1) | US8399090B2 (ja) |
JP (2) | JP4869015B2 (ja) |
KR (1) | KR101076635B1 (ja) |
CN (1) | CN101283069B (ja) |
TW (1) | TW200720388A (ja) |
WO (1) | WO2007046365A1 (ja) |
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JP2008308549A (ja) * | 2007-06-13 | 2008-12-25 | Soken Chem & Eng Co Ltd | 耐熱性粘着剤組成物 |
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WO2011122178A1 (ja) * | 2010-03-31 | 2011-10-06 | リンテック株式会社 | 粘着シート |
JP5737763B2 (ja) * | 2010-03-31 | 2015-06-17 | リンテック株式会社 | 粘着シート |
US9458364B2 (en) | 2010-03-31 | 2016-10-04 | Lintec Corporation | Adhesive sheet |
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CN101283069A (zh) | 2008-10-08 |
KR20080049124A (ko) | 2008-06-03 |
CN101283069B (zh) | 2010-12-01 |
JP2012036402A (ja) | 2012-02-23 |
TWI342326B (ja) | 2011-05-21 |
TW200720388A (en) | 2007-06-01 |
US20090042004A1 (en) | 2009-02-12 |
JP4869015B2 (ja) | 2012-02-01 |
JP2007138147A (ja) | 2007-06-07 |
JP5422629B2 (ja) | 2014-02-19 |
US8399090B2 (en) | 2013-03-19 |
KR101076635B1 (ko) | 2011-10-26 |
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