WO2007108363A1 - 粘着型光学フィルム、積層光学フィルムおよび画像表示装置 - Google Patents
粘着型光学フィルム、積層光学フィルムおよび画像表示装置 Download PDFInfo
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- WO2007108363A1 WO2007108363A1 PCT/JP2007/054928 JP2007054928W WO2007108363A1 WO 2007108363 A1 WO2007108363 A1 WO 2007108363A1 JP 2007054928 W JP2007054928 W JP 2007054928W WO 2007108363 A1 WO2007108363 A1 WO 2007108363A1
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- optical film
- pressure
- sensitive adhesive
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- QROGIFZRVHSFLM-UHFFFAOYSA-N prop-1-enylbenzene Chemical compound CC=CC1=CC=CC=C1 QROGIFZRVHSFLM-UHFFFAOYSA-N 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 125000004368 propenyl group Chemical group C(=CC)* 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- HNJBEVLQSNELDL-UHFFFAOYSA-N pyrrolidin-2-one Chemical compound O=C1CCCN1 HNJBEVLQSNELDL-UHFFFAOYSA-N 0.000 description 1
- 150000003254 radicals Chemical class 0.000 description 1
- 229920005604 random copolymer Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000012966 redox initiator Substances 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 229920006300 shrink film Polymers 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 description 1
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 description 1
- 235000019333 sodium laurylsulphate Nutrition 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 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
- 238000010186 staining Methods 0.000 description 1
- 150000003457 sulfones Chemical class 0.000 description 1
- 125000000542 sulfonic acid group Chemical group 0.000 description 1
- 229920006027 ternary co-polymer Polymers 0.000 description 1
- OPQYOFWUFGEMRZ-UHFFFAOYSA-N tert-butyl 2,2-dimethylpropaneperoxoate Chemical compound CC(C)(C)OOC(=O)C(C)(C)C OPQYOFWUFGEMRZ-UHFFFAOYSA-N 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
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 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
- 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
- NMEPHPOFYLLFTK-UHFFFAOYSA-N trimethoxy(octyl)silane Chemical compound CCCCCCCC[Si](OC)(OC)OC NMEPHPOFYLLFTK-UHFFFAOYSA-N 0.000 description 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 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
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/38—Pressure-sensitive adhesives [PSA]
- C09J7/381—Pressure-sensitive adhesives [PSA] based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/385—Acrylic polymers
-
- 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
- C08G18/625—Polymers of alpha-beta ethylenically unsaturated carboxylic acids; hydrolyzed polymers of esters of these acids
- C08G18/6254—Polymers of alpha-beta ethylenically unsaturated carboxylic acids and of esters of these acids containing hydroxy groups
-
- 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
- C08G18/80—Masked polyisocyanates
- C08G18/8003—Masked polyisocyanates masked with compounds having at least two groups containing active hydrogen
- C08G18/8006—Masked polyisocyanates masked with compounds having at least two groups containing active hydrogen with compounds of C08G18/32
- C08G18/8009—Masked polyisocyanates masked with compounds having at least two groups containing active hydrogen with compounds of C08G18/32 with compounds of C08G18/3203
- C08G18/8022—Masked polyisocyanates masked with compounds having at least two groups containing active hydrogen with compounds of C08G18/32 with compounds of C08G18/3203 with polyols having at least three hydroxy groups
- C08G18/8029—Masked aromatic polyisocyanates
-
- 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
- C09J133/062—Copolymers with monomers not covered by C09J133/06
- C09J133/066—Copolymers with monomers not covered by C09J133/06 containing -OH 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
- 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
- C09J133/14—Homopolymers or copolymers of esters of esters containing halogen, nitrogen, sulfur or oxygen atoms in addition to the carboxy oxygen
-
- 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
- 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
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
-
- 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
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/38—Pressure-sensitive adhesives [PSA]
-
- 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
-
- 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
- C09J2433/00—Presence of (meth)acrylic polymer
-
- 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
-
- 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
- Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
- Y10T428/263—Coating layer not in excess of 5 mils thick or equivalent
-
- 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
- Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
- Y10T428/263—Coating layer not in excess of 5 mils thick or equivalent
- Y10T428/264—Up to 3 mils
-
- 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
- Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
- Y10T428/263—Coating layer not in excess of 5 mils thick or equivalent
- Y10T428/264—Up to 3 mils
- Y10T428/265—1 mil or less
-
- 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
Definitions
- Adhesive optical film laminated optical film, and image display device
- the present invention relates to an adhesive optical film having an adhesive layer on at least one surface of an optical film.
- the present invention also relates to a laminated optical film in which the adhesive optical film and another optical film are laminated.
- the present invention relates to an image display device such as a liquid crystal display device and an organic EL display device using the adhesive optical film and the laminated optical film.
- the optical film include a polarizing plate, a retardation plate, an optical compensation film, and a brightness enhancement film. These optical films can be laminated and used as described above. Background art
- polarizing elements In a liquid crystal display or the like, it is indispensable to dispose polarizing elements on both sides of a liquid crystal cell because of its image forming method, and generally a polarizing plate is attached.
- various optical elements are being used for liquid crystal panels in order to improve the display quality of displays.
- a retardation plate for preventing coloring For example, a viewing angle widening film for improving the viewing angle of a liquid crystal display, and a brightness enhancement film for increasing the contrast of the display are used. These films are collectively called optical films.
- the adhesive between the optical film and the liquid crystal cell or the optical film is usually in close contact with each other using an adhesive in order to reduce the loss of light. In such a case, it has the merit that a drying process is not required to fix the optical film.
- a pressure-sensitive adhesive optical film previously provided as a pressure-sensitive adhesive layer on one side of the optical film is generally used.
- Image display devices such as liquid crystal display devices to which the adhesive optical film is applied are used in various environments. Therefore, it is desired that the adhesive optical film has durability such as heat resistance under a high temperature environment and moisture resistance under a high humidity environment. Adhesion between polarizing film and liquid crystal cell glass substrate as improved durability As an agent, it is proposed to use an adhesive made of a (meth) acrylic resin having an amino group and / or amide group-containing (meth) acrylic monomer as a copolymer component of 0.3 to 10% by weight. (Patent Document 1).
- Patent Document 1 JP-A-6-108025
- the present invention has been made in view of such circumstances, and provides an adhesive optical film that can satisfy durability even when the pressure-sensitive adhesive layer is thinned. Objective.
- Another object of the present invention is to provide a laminated optical film using the adhesive optical film, and further to provide an image display device using the adhesive optical film and the laminated optical film.
- the present invention relates to an adhesive optical finem having an adhesive layer on at least one surface of an optical film
- the pressure-sensitive adhesive layer is
- Heterocyclic ring-containing acrylic monomer 3 10 weight 0/0,
- Carboxyl group-containing monomer 0.5 to 5 weight 0/0,
- Hydroxyl group-containing monomer from 0.05 to 2 wt 0/0, and
- the present invention relates to a pressure-sensitive adhesive optical film characterized by being formed of a pressure-sensitive adhesive containing a crosslinking agent.
- heterocyclic ring-containing acrylic monomer those having a morpholine ring, piperidine ring or pyrrolidine ring as the heterocyclic ring are preferably used.
- Attalinoleic acid is preferably used as the carboxyl group-containing monomer.
- hydroxy (meth) acrylate is preferably used as the hydroxy group-containing monomer.
- an isocyanate cross-linking agent is preferably used as the cross-linking agent.
- the amount of the crosslinking agent used is (meth) acrylic polymer 1
- It is preferably 0.02 to 2 parts by weight with respect to 00 parts by weight.
- the pressure-sensitive adhesive optical film is preferably used even when the thickness of the pressure-sensitive adhesive layer is reduced to 1 to 15 / m.
- the pressure-sensitive adhesive optical film various types of optical films can be used.
- the present invention also relates to a laminated optical film, wherein the adhesive optical film is laminated on another optical film via an adhesive layer of the adhesive optical film.
- the pressure-sensitive adhesive layer of the pressure-sensitive adhesive optical film of the present invention is suitable for use in laminating an optical film and an optical film, and is particularly suitable when the pressure-sensitive adhesive layer is thinned.
- the adhesive optical film is an adhesive polarizing plate, which is suitable when a retardation plate is laminated as another optical film.
- the present invention also relates to an image display device using at least one of the adhesive optical film or the laminated optical film.
- Adhesive optical film and laminated optical film of the present invention One or a plurality of screens are used in combination according to various usages of image display devices such as liquid crystal display devices.
- the pressure-sensitive adhesive optical film of the present invention contains the predetermined amount of a heterocyclic-containing acrylic monomer, a carboxyl group-containing monomer, a hydroxyl group-containing monomer, and an alkyl (meth) acrylate as a base polymer of the pressure-sensitive adhesive.
- (Meth) acrylic polymer is used.
- the (meth) acrylic polymer used is a polymer having a weight average molecular weight controlled to a high molecular weight of 1.5 million to 2800,000.
- the (meth) acrylic polymer used in the base polymer of the pressure-sensitive adhesive of the present invention uses a specific amount of a specific monomer and is controlled to have a high molecular weight, thereby reducing the thickness of the pressure-sensitive adhesive layer. Even in this case, durability such as heat resistance and moisture resistance is satisfied.
- a retardation plate is used as the optical film used in the pressure-sensitive adhesive optical film or laminated optical film of the present invention, it is excellent in durability. For example, even in a heating or humidifying environment of the retardation plate. The change in phase difference can be kept small.
- the use ratio of the monomer is out of the ratio, or the weight average molecular weight of the (meth) acrylic polymer is out of the range, the pressure-sensitive adhesive If the layer is thin, the durability cannot be satisfied.
- the pressure-sensitive adhesive optical film of the present invention durability can be satisfied even when the pressure-sensitive adhesive layer is thinned. Therefore, it is possible to reduce the thickness of an image display device such as a liquid crystal display device. Can contribute.
- the pressure-sensitive adhesive optical film can be suitably applied when the pressure-sensitive adhesive layer is used for laminating an optical film and an optical film. That is, according to the pressure-sensitive adhesive optical film of the present invention, even when it is used by being laminated on an optical film, the total thickness of the laminated optical film can be kept low because the pressure-sensitive adhesive layer is thin. As a result, the range of application as a laminated optical film is expanded, and the modes of application of multiple types of optical films and combinations of various optical films are expanded.
- the pressure-sensitive adhesive optical film of the present invention When a thin adhesive layer is used as the pressure-sensitive adhesive optical film of the present invention, it is possible to suppress a glue shift at the end of the pressure-sensitive adhesive optical film. In addition, since the adhesive layer is made thinner, it is possible to apply the adhesive at a low concentration. The appearance of the adhesive optical film is improved. Furthermore, the adhesive area of the glue is reduced, and the lack of glue can be suppressed. Furthermore, when the adhesive optical film is punched out, the adhesive layer sticks out, causing less sticking of the adhesive on the cut surface, and also causing chipping associated with the sticking adhesive. become.
- FIG. 1 is an example of an adhesive optical film of the present invention.
- FIG. 2 is an example of a laminated adhesive optical film of the present invention.
- FIG. 3 is an example of a laminated adhesive optical film of the present invention.
- the adhesive optical film of the present invention will be described with reference to the drawings.
- the pressure-sensitive adhesive optical film A the pressure-sensitive adhesive layer 2 is laminated on one side of the optical film 1.
- an adhesive optical film A1 and an adhesive optical film A2 are laminated.
- a polarizing plate 11 is used as an optical film, and an adhesive layer 21 is laminated thereon.
- a retardation plate 12 is used as an optical film, and an adhesive layer 22 is laminated thereon.
- the adhesive optical film A1, the adhesive optical film A3, and the adhesive optical film A2 are laminated in this order.
- a retardation plate 13 is used as an optical film, and an adhesive layer 23 is laminated thereon. 2 and 3, the pressure-sensitive adhesive layer 22 is bonded to a glass substrate G used for a liquid crystal cell substrate or the like.
- the laminated optical film of the present invention has an adhesive optical film laminated on the optical film. Therefore, the laminated optical film of the present invention includes a case where an adhesive optical film and an adhesive optical film are laminated.
- the type of the adhesive optical film to be laminated and the number of the laminated laminated films are not limited to those shown in FIGS. In the laminated optical film of the present invention, it is sufficient that at least one adhesive type optical film of the present invention is used.
- the adhesive optical film to which the adhesive optical film of the present invention is bonded is not particularly limited, but it is preferable to use a plurality of adhesive optical films of the present invention from the viewpoint of thinning.
- the pressure-sensitive adhesive optical film of the present invention can be applied to any of the pressure-sensitive adhesive optical films Al, A2, and A3, but the optical film and the optical film are particularly required to have a thinner adhesive layer. Applied to lamination.
- the adhesive optical film of the present invention is preferably applied to the adhesive optical films Al and A3.
- the pressure-sensitive adhesive used for forming the pressure-sensitive adhesive layer of the pressure-sensitive adhesive optical film of the present invention has, as a monomer component, a heterocyclic ring-containing acrylic monomer 3 to 10% by weight, a carboxyl group-containing monomer 0.5 to 5% by weight. 0/0, and a hydroxyl group-containing monomer from 0.05 to 2 wt 0/0, and, comprising a ⁇ Norekinore (meth) Atari rate from 83 to 96.45 weight 0/0 (meth) acrylic based polymer Used as a polymer.
- heterocyclic ring-containing acrylic monomer those having a polymerizable functional group and having a heterocyclic ring can be used without particular limitation.
- the polymerizable functional group include a (meth) ataryloyl group and a vinyl ether group. With these strengths, a (meth) atallyloyl group is preferred.
- the heterocyclic ring include a morpholine ring, piperidine ring, pyrrolidine ring, piperazine ring and the like.
- heterocyclic ring-containing acrylic monomer examples include N-attalyloylmorpholine, N-attalyloylpiperidine, N-methacryloylpiperidine, N-atalyloylpyrrolidine and the like. Of these, N-attalyloylmorpholine is preferred.
- the heterocyclic ring-containing acrylic monomer can improve the durability of both heat resistance and moisture resistance when the pressure-sensitive adhesive layer is thinned. Even if a monomer having an amino group, an alicyclic group or the like is used in place of the heterocyclic ring-containing acrylic monomer, neither the heat resistance nor the moisture resistance can be satisfied.
- the heterocyclic ring-containing acrylic monomer improves the adhesive strength of the adhesive layer to the optical film. It is preferable in that it can be performed. In particular, it is suitable when cyclic polyolefin is used as an optical film that is preferable in terms of improving the adhesive force to cyclic polyolefin such as norbornene resin.
- the heterocyclic ring-containing acrylic monomer is used in a ratio of 3 to 10% by weight based on the total amount of monomer components forming the (meth) acrylic polymer.
- the proportion of the heterocyclic ring-containing acrylic monomer is preferably 4 to 9.5% by weight, more preferably 6 to 9% by weight.
- the proportion of the heterocyclic ring-containing acrylic monomer is less than the above range, neither the heat resistance nor the moisture resistance when the pressure-sensitive adhesive layer is made thin can be satisfied. Further, if the ratio of the heterocyclic ring-containing acryl monomer exceeds the above range, the moisture resistance when the thickness is reduced cannot be satisfied.
- the heterocyclic ring-containing acrylic monomer has a force capable of improving the bonding property of the pressure-sensitive adhesive layer.
- the ratio of the heterocyclic ring-containing acrylic monomer is larger than the above range, and the effect of improving the bonding property is reduced. Further, if the ratio of the heterocyclic ring-containing acrylic monomer is larger than the above range, it is not preferable from the viewpoint of decreasing the adhesive strength.
- carboxyl group-containing monomer those having a polymerizable functional group and having a carboxyl group can be used without particular limitation.
- the carboxyl group-containing monomer include (meth) acrylic acid, carboxyethyl (meth) acrylate, carboxypentyl (meth) acrylate, itaconic acid, maleic acid, fumaric acid, crotonic acid and the like.
- (meth) acrylic acid particularly acrylic acid is preferred.
- the carboxyl group-containing monomer is used in a proportion of 0.5 to 5% by weight based on the total amount of monomer components forming the (meth) acrylic polymer.
- the proportion of the carboxylate group-containing monomer is preferably 1 to 4.5% by weight, more preferably 1.5 to 4% by weight. If the proportion of the carboxynole group-containing monomer is less than the above range, the heat resistance when the pressure-sensitive adhesive layer is reduced cannot be satisfied. Further, if the ratio of the carboxyleno group-containing monomer exceeds the above range, neither the heat resistance nor the moisture resistance when the thickness is reduced can be satisfied. Moreover, when the ratio of a carboxylene group containing monomer exceeds the said range, it is unpreferable also at the point which adhesive force falls.
- hydroxyl group-containing monomer those having a polymerizable functional group and having a hydroxyl group can be used without particular limitation.
- hydroxyl group-containing monomers For example, 2-hydroxyethyl (meth) atarylate, 2-hydroxybutyl (meth) ataryl
- the hydroxyl group-containing monomer is used in a proportion of 0.05 to 2% by weight based on the total amount of monomer components forming the (meth) acrylic polymer.
- the proportion of the hydroxyl group-containing monomer is preferably from 0.007 to 1.5% by weight, more preferably from 0.:! To 1% by weight. If the proportion of the hydroxyl group-containing monomer is less than the above range, the heat resistance when the pressure-sensitive adhesive layer is made thin cannot be satisfied. Further, if the proportion of the hydroxyl group-containing monomer exceeds the above range, the heat resistance, moisture resistance, and deviation durability when the thickness is reduced cannot be satisfied. Further, when the proportion of the hydroxyl group-containing monomer is larger than the above range, it is not preferable from the viewpoint of reducing the bonding property and the adhesive strength.
- the average carbon number of the alkyl group of the alkyl (meth) acrylate is about 1 to 12; Note that (meth) acrylate refers to acrylate and / or meta acrylate, and (meta) in the present invention has the same meaning.
- alkyl (meth) acrylate examples include methyl (meth) acrylate, ethyl (meth) acrylate, n-butyl (meth) acrylate, 2_ethyl hexyl (meth) acrylate, isooctanol (meth) Examples include attalylate, isononyl (meth) acrylate, lauryl (meth) acrylate, and the like, which can be used alone or in combination. Among these, the carbon number of the alkyl group is 1 to
- alkyl (meth) acrylate is used in a proportion of 83 to 96.45% by weight based on the total amount of monomer components forming the (meth) acrylic polymer.
- Alkyl (meth) acrylate is usually the above-mentioned heterocyclic ring-containing acrylic monomer, carboxylate group-containing monomer and hydrogen. It is the remainder other than the droxynole group-containing monomer.
- the monomer component that forms the (meth) acrylic polymer in addition to the monomer, a monomer other than the above is used within a range of 10% or less of the total amount of the monomer within the range not detracting from the purpose of the present invention. be able to.
- Examples of such optional monomers include maleic anhydride, itaconic anhydride and other acid anhydride group-containing monomers; acrylic acid power prolatatone adducts; styrene sulfonic acid gallic sulfonic acid, 2_ (meth) acrylamide_2_ Sulfonic acid group-containing monomers such as methyl propane sulfonic acid, (meth) acrylamide prop sulfonic acid, sulfopropyl (meth) acrylate, (meth) attaroyloxynaphthalene sulfonic acid; 2-hydroxyethyl allyloyl phosphate And phosphoric acid group-containing monomers.
- Nitrogen-containing bull monomer is available.
- maleimide N-cyclohexenoremaleimide, N-phenylenomaleimide
- silane monomers containing a silicon atom examples include 3-ataryloxypropyltriethoxysilane, butyltrimethoxysilane, butyltriethoxysilane, 4-butylbutyltrimethoxysilane, 4-butylbutyltriethoxysilane, and 8-butyloctyltri Methoxysilane, 8-Buoctyltriethoxysilane, 10-Methacryloyloxydecyltrimethoxysilane, 10-Athalyloxydecyltrimethoxysilane, 10-Methacryloyloxydecyltriethoxysilane, 10-Attaroyloxy And decyltriethoxysilane.
- the (meth) acrylic polymer of the present invention has a weight average molecular weight of 1,500,000 to 2,800,000.
- weight average molecular weight is a value measured by GPC (gel permeation chromatography) and calculated in terms of polystyrene.
- 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 specific solution polymerization example the reaction is performed under an inert gas stream such as nitrogen.
- the polymerization initiator is added, and the reaction is usually performed at about 50 to 70 ° C under reaction conditions of about 5 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.
- the weight average molecular weight of the (meth) acrylic polymer can be controlled by the amount of the polymerization initiator, the amount of chain transfer agent used, and the reaction conditions, and the amount used is appropriately adjusted depending on the type of these. .
- Examples of the polymerization initiator include 2,2'-azobisisobutyronitrile and 2,2'-azobis.
- the polymerization initiator may be used alone or in admixture of two or more. Power
- the total content is from 0.005 to 100 parts by weight of the monomer. ! It is preferable that the amount is about parts by weight. It is more preferable that the amount is about 0.02-0.5 parts by weight.
- the amount is preferably about 0.06 to 0.22 parts by weight, more preferably about 0.08 to 0.175 parts by weight with respect to 100 parts by weight of the total amount of monomer components.
- Examples of the chain transfer agent include lauryl mercaptan, glycidyl mercaptan, mercaptoacetic acid, 2_mercaptoethanol, thioglycolic acid, thiodalcholate 2_ethylhexyl, and 2,3-dimercapto_1_propanol. It is done.
- the chain transfer agent may be used alone or in combination of two or more, but the total content is 0.1 parts by weight with respect to 100 parts by weight of the total amount of monomer components. Less than or equal to
- the emulsifier used in emulsion polymerization includes, for example, sodium lauryl sulfate, ammonium lauryl sulfate, sodium dodecylbenzenesulfonate, ammonium polyoxyethylene alkyl ether sulfate, sodium polyoxyethylene alkylphenyl sodium sulfate, and the like.
- Nonionic emulsifiers such as anionic emulsifiers, polyoxyethylene alkyl ethers, polyoxyethylene alkyl phenyl ethers, polyoxyethylene fatty acid esters, polyoxyethylene polyoxypropylene block polymers, and the like. 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 propenyl group and aryl ether group are introduced, specifically, for example, Aqualon HS-10, HS-20, KH-10 BC-05, BC-10, BC-20 (all of which are manufactured by Daiichi Kogyo Seiyaku Co., Ltd.), Adekaria Soap SE10N (Asahi Denka Kogyo Co., Ltd.), etc.
- 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 total amount of monomer components, and more preferably 0.5 to 1 part by weight from the viewpoint of polymerization stability and mechanical stability.
- the pressure-sensitive adhesive is preferably a pressure-sensitive adhesive composition containing a crosslinking agent.
- the polyfunctional compound that can be added to the pressure-sensitive adhesive include organic crosslinking agents and polyfunctional metal chelates.
- the organic crosslinking agent include an epoxy crosslinking agent, an isocyanate crosslinking agent, and an imine crosslinking agent. Isocyanate-based crosslinking agents are preferred as organic crosslinking agents.
- a polyfunctional metal chelate is one in which a polyvalent metal is covalently or coordinately bonded to an organic compound.
- Multivalent metal atoms include Al, Cr, Zr, Co, Cu, Fe, Ni, V, Zn, In, Ca, Mg, Mn, Y, Ce, Sr, Ba, Mo, La, Sn, Ti, etc. Can be given. Covalent bond or In the organic compound that forms a coordinate bond, an oxygen atom and the like are exemplified, and examples of the organic compound include an alkyl ester, an alcohol compound, a carboxylic acid compound, an ether compound, and a ketone compound.
- Examples of the isocyanate crosslinking agent include aromatic isocyanates such as tolylene diisocyanate and xylene diisocyanate, alicyclic isocyanates such as isophorone diisocyanate, hexamethylene diisocyanate, and the like. Examples include aliphatic isocyanates.
- lower aliphatic polyisocyanates such as butylene diisocyanate and hexamethylene diisocyanate, cyclopentylene diisocyanate, and cyclohexylene diisocyanate.
- Cycloaliphatic isocyanates such as isophorone diisocyanate, 2, 4_tolylene diisocyanate, 4, 4'-diphenylmethane diisocyanate, xylylene diisocyanate, polymethylene polyphenyl isocyanate, etc.
- Aromatic diisocyanates trimethylolpropane / tolylene diisocyanate trimers (manufactured by Nippon Polyethane Kogyo Co., Ltd., trade name Coronate L), trimethylolpropane / hexamethylene diisocyanate trimer Additives (made by Nippon Polyurethane Industry Co., Ltd., trade name Coronate HL), hexamethylene diisocyanate Isocyanurate products (manufactured by Nippon Polyurethane Industry Co., Ltd., trade name: COXINATE HX), isocyanate adducts, polyether polyisocyanates, polyester polyisocyanates, and adducts of these with various polyols, Examples thereof include polyisocyanates polyfunctionalized with isocyanurate bonds, burette bonds, and allophanate bonds.
- 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. It is more preferable that it is contained. If the amount is less than 0.02 parts by weight, the cohesive force may be insufficient. On the other hand, if the amount exceeds 2 parts by weight, cross-linking may be excessive and adhesion may be poor.
- the pressure-sensitive adhesive may include a tackifier, a plasticizer, glass fiber, glass beads, metal powder, other inorganic powders, a pigment, a colorant, and a filler as necessary.
- a tackifier e.g., a plasticizer, glass fiber, glass beads, metal powder, other inorganic powders, a pigment, a colorant, and a filler as necessary.
- Antioxidants, UV absorbers, silane coupling agents, etc. and should not depart from the object of the present invention.
- Various additives can also be used as appropriate within a range.
- the pressure-sensitive adhesive optical film of the present invention is obtained by forming a pressure-sensitive adhesive layer on at least one surface of the optical film with the pressure-sensitive adhesive.
- the pressure-sensitive adhesive composition is applied to a peeled separator, and the polymerization solvent is dried and removed to form a pressure-sensitive adhesive layer. It is produced by a method of transferring, or a method of applying the pressure-sensitive adhesive composition to an optical film and drying and removing a polymer solvent to form a pressure-sensitive adhesive layer on the optical film. In applying the adhesive, one or more solvents other than the polymerization solvent may be added as appropriate.
- the pressure-sensitive adhesive layer can be formed after forming an anchor layer on the surface of the optical film or performing various easy adhesion treatments such as corona treatment and plasma treatment.
- the surface of the pressure-sensitive adhesive layer may be subjected to an easy attachment treatment.
- Various methods are used as a method of forming the pressure-sensitive adhesive layer. Specifically, for example, a roll coat, kiss roll coat, gravure coat, reverse coat, roll brush, spray coat, dip roll coat, bar coat, knife coat, air knife coat, curtain coat, lip coat, die coater. Examples thereof include an extrusion coating method.
- the thickness of the pressure-sensitive adhesive layer is not particularly limited, and is, for example, about 1 to about 100 ⁇ m.
- application to a thinned pressure-sensitive adhesive layer is preferable, and it is also preferable when the thickness of the pressure-sensitive adhesive layer is:! To 15 / m.
- the thickness of the pressure-sensitive adhesive layer can be reduced to 1 to 12 ⁇ , further to:! To 10 ⁇ m, and further to: 8 to 8 zm.
- the pressure-sensitive adhesive layer When the pressure-sensitive adhesive layer is exposed, the pressure-sensitive adhesive layer may be protected with a sheet (separator) subjected to a 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 nonwoven fabric, nets, foam sheets, metal foils, and laminates thereof. Suitable thin leaf bodies such as the body can be mentioned, but the plastic film is excellent in terms of surface smoothness. Rum is preferably used.
- the plastic film is not particularly limited as long as it can protect the pressure-sensitive adhesive layer, and for example, a polyethylene film, a polypropylene film, a polybutene film, a polybutadiene film, a polymethylpentene film, a polychlorinated butyl.
- a polyethylene film, a polypropylene film, a polybutene film, a polybutadiene film, a polymethylpentene film, a polychlorinated butyl examples thereof include a film, a chlorinated butyl copolymer film, a polyethylene terephthalate film, a polybutylene terephthalate film, a polyurethane film, and an ethylene monoacetate butyl copolymer film.
- the thickness of the separator is usually about 5 to 200 x m, preferably about 5 to 100 ⁇ m.
- release and antifouling treatment with a silicone, fluorine, long chain alkyl or fatty acid amide release agent, silica powder, etc., coating type, kneading type, vapor deposition type It is also possible to carry out antistatic treatment such as.
- the peelability of the pressure-sensitive adhesive layer force can be further improved by appropriately performing a release treatment such as silicone treatment, long-chain alkyl treatment, or fluorine treatment on the surface of the separator.
- release-treated sheet used in the production of the above-mentioned pressure-sensitive adhesive optical film can be used as a separator for the pressure-sensitive adhesive optical film as it is, and the process can be simplified.
- the optical film 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.
- the optical film includes a polarizing plate.
- a polarizing plate having a transparent protective film on one or both sides of a polarizer is generally used.
- the polarizer is not particularly limited, and various types of polarizers can be used.
- polarizers include hydrophilic polymer films such as polyalcohol-based films, partially formalized polybulal alcohol-based films, and ethylene / acetic acid copolymer-based partially saponified films, and iodine and dichroic dyes.
- hydrophilic polymer films such as polyalcohol-based films, partially formalized polybulal alcohol-based films, and ethylene / acetic acid copolymer-based partially saponified films
- iodine and dichroic dyes examples include uniaxially stretched films that adsorb dichroic substances, polyene-based oriented films such as polybutyl alcohol dehydrated products and polyvinyl chloride dehydrochlorinated products.
- a polarizer composed of a polybulal alcohol film and a dichroic substance such as iodine is preferable.
- 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 can be immersed in an aqueous solution such as potassium iodide which may contain boric acid, zinc sulfate, zinc chloride and the like. Furthermore, if necessary, the polybulal alcohol film can be immersed in water and washed before dyeing.
- the stretching may be performed after dyeing with iodine, may be performed while dyeing, or may be performed after being stretched and then dyed with iodine. Stretching in an aqueous solution such as boric acid or potassium iodide or in a water bath.
- a material for forming a transparent protective film provided on one or both sides of the polarizer a material excellent in transparency, mechanical strength, thermal stability, moisture barrier property, isotropy, and the like is preferable.
- polyester polymers such as polyethylene terephthalate and polyethylene naphthalate
- cellulosic polymers such as diacetyl cellulose triacetyl cellulose
- acrylic polymers such as polymethyl methacrylate, polystyrene and attalononitrile styrene copolymers ( AS resin) and polycarbonate polymers.
- polymer blends and the like are examples of polymers that form the transparent protective film.
- the transparent protective film can also be formed as a cured layer of thermosetting or ultraviolet curable resin such as acrylic, urethane, acrylurethane, epoxy, and silicone.
- a polymer finolem described in JP-A-2001-343529 (001/37007)
- a resin composition containing (A) a thermoplastic resin having a substituted and / or unsubstituted imide group in the side chain, and (B) a thermoplastic resin having a substituted and / or unsubstituted phenyl and nitrile group in the side chain.
- Things are given.
- 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 made of a mixed extruded product of a resin composition or the like can be used.
- the thickness of the protective film can be determined as appropriate, but is generally about from! To 500 zm from the viewpoints of workability such as strength and handleability, and thin film properties. In particular, 5 to 200 ⁇ m is preferable.
- a protective film having a direction retardation of ⁇ 90 nm to +75 nm is preferably used.
- the thickness direction retardation (Rth) is more preferably ⁇ 80111111 to +6011111, and particularly preferably 70 nm to +45 nm.
- the protective film cellulose-based polymers such as triacetyl cellulose are preferred from the viewpoint of polarization characteristics and durability.
- a triacetyl cellulose film is particularly preferable.
- protective films made of different polymer materials or the like may be used, which may be the same protective film made of the same polymer material.
- the polarizer and the protective film are usually in close contact with each other through an aqueous adhesive or the like.
- water-based adhesives include isocyanate-based adhesives, polybulal alcohol-based adhesives, gelatin-based adhesives, bull-based latex-based, water-based polyurethane, water-based polyester, and the like.
- the surface of the transparent protective film to which the polarizer is not adhered may be subjected to a hard coat layer, antireflection treatment, anti-sticking treatment, or treatment for diffusion or antiglare.
- the hard coat treatment is performed for the purpose of preventing scratches on the surface of the polarizing plate.
- hardness and slipping characteristics with an appropriate ultraviolet curable resin such as acrylic or silicone are used. It can be formed by a method of adding a cured film excellent in the above 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.
- the anti-glare treatment is performed for the purpose of preventing external light from being reflected on the surface of the polarizing plate and obstructing the visual recognition of the light transmitted through the polarizing plate. 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 roughening method or a combination method of transparent fine particles.
- the fine particles to be included in the formation of the fine surface uneven structure include, for example, a conductive material made of silica, anolemina, titania, zirconia, tin oxide, indium oxide, cadmium oxide, antimony oxide or the like having an average particle diameter of 0.5 to 50 ⁇ .
- Transparent fine particles such as inorganic fine particles, which may have properties, and organic fine particles made of a crosslinked or uncrosslinked polymer are 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, and the transparent protective layer as an optical layer is an additional IJ body. It can also be provided.
- optical film for example, a reflection plate, an anti-transmission plate, a retardation plate (including wavelength plates such as 1/2 and 1/4), a viewing angle compensation film, a liquid crystal display device such as a brightness enhancement film, etc.
- lifted What becomes an optical layer which may be used for formation is mention
- lifted can be used alone as an optical film, or can be laminated on the polarizing plate for practical use and used in one or more layers.
- a reflective polarizing plate or a 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 a 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.
- the reflective polarizing plate is a polarizing plate provided with a reflective layer, and is used to form a liquid crystal display device 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 made of metal or the like is provided on one surface of the polarizing plate through a transparent protective layer or the like as 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 include fine particles having a surface fine uneven structure, and a reflective layer having a fine uneven structure on the surface.
- the reflective layer having the fine concavo-convex structure described above has the advantage that incident light is diffused by irregular reflection to prevent directivity and glaring appearance, and to suppress unevenness in brightness and darkness.
- the protective film containing fine particles also has an advantage that incident light and its reflected light are diffused when passing through it to further suppress bright spots.
- the reflective layer having a fine concavo-convex structure reflecting the surface fine concavo-convex structure of the transparent protective film can be formed by, for example, applying the metal to the surface of the transparent protective layer by an appropriate method such as a vacuum deposition method, an ion plating method, a sputtering method, or a plating method It can be performed by a method of attaching directly to the screen.
- the reflective plate instead of the method of directly applying the reflective plate to the transparent protective film of the polarizing plate, it is also possible to use it as a reflective sheet in which a reflective layer is provided on an appropriate film according to the transparent film. Since the reflective layer is usually made of metal, the usage pattern in which the reflective surface is covered with a transparent protective film or a polarizing plate prevents the reflectance from being lowered due to oxidation, and the initial reflectance. It is more preferable because of its long-term sustainability and avoidance of a separate 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.
- the transflective polarizing plate is usually provided on the back side of the liquid crystal cell.
- the incident light from the viewing side is reflected to display an image.
- the backlight built in the back side of the transflective polarizing plate A liquid crystal display device that displays images using a built-in power source such as
- the transflective polarizing plate can save energy when using a light source such as a backlight in a bright atmosphere, and can be used to form a liquid crystal display device that can be used with a built-in power supply even in a relatively dark atmosphere. Useful.
- a phase difference plate is used when changing linearly polarized light to elliptically or circularly polarized light, changing elliptically or circularly polarized light to linearly polarized light, or changing the polarization direction of linearly polarized light.
- a so-called quarter-wave plate also referred to as a ⁇ / 4 plate
- a 1Z2 wavelength plate also referred to as a ⁇ / 2 plate
- the elliptically polarizing plate compensates (prevents) the coloring (blue or yellow) caused by the double bending of the liquid crystal layer of the super twist nematic (STN) type liquid crystal display device, and displays the above-described coloring without black and white. It is used effectively in such cases. Furthermore, those with a controlled three-dimensional refractive index are preferred because they can compensate (prevent) coloring that occurs when the screen of a 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 an 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 / im.
- polymer material examples include, for example, polyvinyl alcohol, polyvinyl butyral, polymethylenovinino reethenole, polyhydroxy ethino rare tallylate, hydroxy ethino resenorelose, hydroxypropino resenorelose, methino resenorelose , Polycarbonate, Polyarylate, Polysenolephone, Polyethylene terephthalate, Polyethylene naphthalate, Polyetherenoles norephone, Polyphenylene sulfide, Polyphenylene oxide, Polyallylsulfone, Polyamide, Polyimide, Polyolefin, Polychlorinated bur, Cellulose polymer, Norbornene Resin, or these binary and ternary copolymers, graft copolymers, and blends. Of these, norbornene resins are preferably used. This These polymer materials become an oriented product (stretched film) by stretching or the like.
- the alignment film of the liquid crystal polymer can be formed of a liquid crystal material such as a liquid crystal polymer, a liquid crystal monomer, or a mixture thereof.
- the liquid crystal monomer has various skeletons exhibiting nematic, cholesteric, or smectic liquid crystal alignment, and has an end such as an unsaturated double bond such as an talyloyl group, a methacryloyl group, or a bur group, or an epoxy group. It is a liquid crystal compound having at least one polymerizable functional group. Among these liquid crystal monomers, a liquid crystalline compound having at least one unsaturated double bond such as an alitaroyl group or a methacryloyl group, and a nematic liquid crystalline compound is awarded. As a liquid crystal monomer, one having two or more photopolymerizable functional groups is preferred for improving durability.
- liquid crystal polymer examples include various main-chain and side-chain types in which a conjugated linear atomic group (mesogen) imparting liquid crystal orientation is introduced into the main chain or side chain of the polymer.
- main chain type liquid crystal polymer examples include a nematic orientation polyester liquid crystal polymer, a discotic polymer and a cholesteric polymer having a structure in which a mesogenic group is bonded at a spacer portion that imparts flexibility. It is done.
- side-chain liquid crystal polymers include polysiloxane, polyacrylate, polymetatalylate, or polymalonate as the main chain skeleton, and nematic alignment imparted via a spacer unit consisting of conjugated atomic groups as side chains. And those having a mesogenic moiety composed of a functional para-substituted cyclic compound unit.
- the alignment film of the liquid crystal polymer is, for example, an alignment-treated surface such as a surface of a thin film made of polyimide or poly-alcohol or the like formed on a glass plate, or an oblique vapor deposition of silicon oxide. It is carried out by spreading a liquid crystal material solution on the top or an orientation substrate such as a stretched film 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 or birefringence of the liquid crystal layer, compensation of viewing angle, and the like. It is possible to use a type in which more than a kind of retardation plates are stacked to control optical characteristics such as retardation.
- the elliptically polarizing plate and the reflective elliptical polarizing plate described above are similar to the polarizing plate or the reflective polarizing plate.
- a phase difference plate is laminated in an appropriate combination.
- a powerful elliptical polarizing plate or the like can also be formed by laminating them separately in the manufacturing process of the liquid crystal display device so as to be a combination of a (reflection type) polarizing plate and a retardation plate.
- an optical fine frame such as an elliptically polarizing plate is advantageous in that it has excellent quality stability, lamination workability, and the like, and can improve the manufacturing efficiency of a liquid crystal display device and the like.
- 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 from a slightly oblique direction rather than perpendicular to the screen.
- a viewing angle compensation phase difference plate examples include a phase difference plate, an alignment film such as a liquid crystal polymer, and a film in which an alignment layer such as a liquid crystal polymer is supported on a transparent substrate.
- a retardation film used as a viewing angle compensation film is biaxially stretched in the plane direction, whereas a normal retardation film uses a birefringent polymer fine film stretched uniaxially in the plane direction.
- Birefringence such as a polymer film having a birefringence, a birefringence polymer uniaxially stretched in the plane direction and a birefringence with a controlled refractive index in the thickness direction and a tilt oriented film.
- a film or the like is used.
- the tilted alignment film include a film obtained by bonding a heat-shrink film to a polymer film and stretching or / and contracting the polymer film under the action of the contraction force by heating, or a liquid crystal polymer that is obliquely aligned. Etc.
- the raw material polymer for the phase difference plate is the same as the polymer described in the previous phase difference plate, preventing coloration due to a change in the viewing angle based on the phase difference of the liquid crystal cell and expanding the viewing angle for good viewing. Anything suitable for the purpose can be used.
- a liquid crystal polymer alignment layer particularly an optically anisotropic layer composed of a discotic liquid crystal polymer gradient alignment layer, is supported by a triacetyl cellulose film in order to achieve a wide viewing angle with good visibility.
- the optically compensated retardation plate is preferably used.
- a polarizing plate obtained by bonding a polarizing plate and a brightness enhancement film is usually used by being 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 enter and be in a predetermined polarization state. Transmitted light is obtained and light other than the predetermined polarization state is reflected without being transmitted.
- the light reflected on the surface of the brightness enhancement film is further inverted through a reflective layer provided behind the brightness enhancement film and re-incident on the brightness enhancement film, and part or all of the light is transmitted as light having a predetermined polarization state.
- a reflective layer provided behind the brightness enhancement film and re-incident on the brightness enhancement film, and part or all of the light is transmitted as light having a predetermined polarization state.
- light having a polarization direction that does not coincide with the polarization axis of the polarizer is almost polarized. It is absorbed by the child.
- 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 or the like 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 inverted between the two can pass through the polarizer is obtained. Is transmitted to the polarizer so that light such as a backlight can be efficiently used 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.
- the polarized light reflected by the brightness enhancement film is directed to the reflection layer and the like, but the installed diffuser diffuses the light passing therethrough at the same time and simultaneously cancels the polarization state to become a 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 and the like, and again passes through the diffusion plate and reenters the brightness enhancement film.
- the brightness of the display screen is maintained, and at the same time, uneven brightness of the display screen is reduced.
- Examples of the brightness enhancement film include dielectric multilayer thin films and refractive index anisotropy. Supports the alignment film of cholesteric liquid crystal polymer and its alignment liquid crystal layer on a film substrate, such as a multilayer laminate of different thin film films, which shows the characteristic of transmitting linearly polarized light with a predetermined polarization axis and reflecting other light Appropriate ones such as those that reflect either left-handed or right-handed circularly polarized light and transmit other light can be used.
- the transmission light is directly incident on the polarizing plate with the polarization axis aligned, thereby suppressing absorption loss due to the polarizing plate.
- the circularly polarized light is linearly polarized via a retardation plate from the viewpoint of suppressing force absorption loss that can be directly incident on a polarizer. It is preferable to make it enter into a 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 at a wide wavelength such as in the visible light region has, for example, a retardation plate that functions as a quarter-wave plate for light-colored light with a wavelength of 55 Onm and other retardation characteristics.
- the force S can be obtained by a method of superposing the retardation layer shown, for example, a retardation layer functioning as a half-wave plate.
- the retardation plate disposed between the polarizing plate and the brightness enhancement film may be composed of 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 and having an arrangement structure in which two or more layers are superimposed. Based on this, it is possible to obtain transmission circular polarization 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, 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 and a retardation plate are combined may be used.
- An optical film in which the optical layer is laminated on a polarizing plate can be formed by a method of sequentially laminating separately in the 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.
- an appropriate adhesive means such as an adhesive layer can be used. in front When the polarizing plate and the other optical layer are bonded, their optical axes can be arranged at an appropriate angle depending on the target retardation characteristics.
- each layer such as an optical film and an adhesive layer of the adhesive optical film of the present invention includes, for example, a salicylic acid ester compound, a benzophenol compound, a benzotriazole compound, a cyanoacrylate compound, and a nickel complex compound. It may be one that has an ultraviolet absorbing ability by a method such as a method of treating with an ultraviolet absorber such as
- the pressure-sensitive adhesive optical film of the present invention can be preferably used for forming various image display devices such as liquid crystal display devices.
- the liquid crystal display device can be formed according to conventional methods.
- a liquid crystal display device is generally formed by appropriately assembling components such as a liquid crystal cell, an adhesive optical film, and an illumination system as necessary, and incorporating a drive circuit.
- the optical film according to the present invention there is no particular limitation and it can conform to the conventional case.
- an arbitrary type such as an arbitrary type such as a TN type, an STN type, or a ⁇ type can be used.
- an appropriate liquid crystal display device such as a liquid crystal display device in which an adhesive optical film is disposed on one side or both sides of a liquid crystal cell, or a backlight or a reflector used in an illumination system.
- the optical film according to the present invention can be installed on one side or both sides of the liquid crystal cell.
- optical films may be the same or different.
- one or two layers of appropriate parts such as a diffuser plate, an antiglare layer, an antireflection film, a protective plate, a prism array, a lens array sheet, a light diffuser plate, and a knocklight are placed at appropriate positions. More than one layer can be arranged.
- 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, one monomer component was not included.
- an acrylic resin was prepared in the same manner as in Example 1 except that at least one of the type and amount of monomer components and the amount of polymerization initiator used was changed as shown in Table 1.
- a system polymer solution was prepared. Weight of acrylic polymer obtained in each example The weight average molecular weight is shown in Table 1.
- a polyisocyanate-based crosslinking agent (made by Nippon Polyurethane Industry Co., Ltd.) consisting of a trimethylolpropane adduct of tolylene diisocyanate as a crosslinking agent with respect to 100 parts of the solid content of the acrylic polymer solution obtained in Production Example 1. Coronate L) An acrylic pressure-sensitive adhesive solution containing 0.2 part was prepared.
- the acrylic pressure-sensitive adhesive solution was dried on one side of a polyethylene-treated polyethylene terephthalate (PET) film (manufactured by Mitsubishi Chemical Polyester Film Co., Ltd., thickness: 38 ⁇ m).
- PET polyethylene-treated polyethylene terephthalate
- the film was applied to a thickness of 5 xm and dried at 150 ° C for 3 minutes to form an adhesive layer.
- the pressure-sensitive adhesive layer was transferred to a polarizing plate (manufactured by Nitto Denko Corporation, SEG5224DU) to produce a polarizing plate (A) with a pressure-sensitive adhesive layer.
- Example 1 the type of acrylic polymer solution used in the preparation of the acrylic pressure-sensitive adhesive solution, the blending amount of the crosslinking agent, and the thickness of the pressure-sensitive adhesive layer after drying were changed as shown in Table 2.
- a polarizing plate (A) with an adhesive layer was produced in the same manner as Example 1 except for the above.
- Example 1 a retardation film with a pressure-sensitive adhesive layer (A) was used in the same manner as in Example 1 except that a retardation film manufactured by CJSR, norbornene film, product name Arton) was used instead of the polarizing plate. ) was produced.
- Example 1 was applied to the phase difference plate side of the obtained phase difference plate with an adhesive layer (A).
- a laminated optical film having a pressure-sensitive adhesive layer and having a pressure-sensitive adhesive layer was prepared.
- Example 1 the type of acrylic polymer solution used in the preparation of the acrylic pressure-sensitive adhesive solution and the blending amount of the crosslinking agent were changed as shown in Table 2.
- Plate A retardation film with an adhesive layer (A) was prepared in the same manner as in Example 1 except that CFSR, norbornene film, product name Arton) was used. Obtained phase difference with adhesive layer
- the polarizing plate (A) with an adhesive layer obtained in Example 1 was bonded to the retardation plate side of the plate (A). Then, a laminated optical film with a pressure-sensitive adhesive layer having a configuration of polarizing plate / pressure-sensitive adhesive layer / retardation plate / pressure-sensitive adhesive layer was produced.
- a polyisocyanate-based crosslinking agent (produced by Nippon Polyurethane Industry Co., Ltd.) comprising a trimethylolpropane adduct of tolylene diisocyanate as a crosslinking agent with respect to 100 parts of the solid content of the obtained acrylic polymer solution.
- Coronate L An acrylic pressure-sensitive adhesive solution containing 0.6 parts by weight was prepared. This is referred to as an acrylic adhesive solution A.
- the above-mentioned acrylic pressure-sensitive adhesive solution was dried on one side of a polyethylene-treated polyethylene terephthalate (PET) film (Mitsubishi Chemical Polyester Film Co., Ltd., thickness: 38 ⁇ m).
- PET polyethylene-treated polyethylene terephthalate
- the film was applied to a thickness of 25 ⁇ ⁇ and dried at 130 ° C for 3 minutes to form an adhesive layer.
- the pressure-sensitive adhesive layer was transferred to a retardation film CISR, norbornene-based film, product name Arton), and a retardation film with a pressure-sensitive adhesive layer (A) was produced.
- Laminated optical film is bonded to the above retardation plate (A) with the adhesive layer
- FIG. 2 A sample using the polarizing plate with an adhesive layer (A) is shown in Fig. 2.
- Samples 1 and 2 above are cut into 5 inch sizes, pasted on 0.5 mm non-acrylic glass (Corning Corp., 1737), and then processed in an autoclave at 50 ° C and 0.5 MPa for 15 minutes Then, it was stored for 500 hours in an atmosphere of 60 ° C. and 95% RH, and then returned to room temperature (about 25 ° C.).
- the laminated optical film was bonded to a retardation plate ISR, norbornene-based film, product name “arton”, then cut to 25 mm X I 50 mm, and peel angle 90 with a tensile tester.
- the adhesive strength was measured at a peeling speed of 300 mm / min.
- BA Butyl Atylate
- 2EHA 2-Ethylhexyl Atylate
- CHA Cyclohexyl Atylate
- ACM ⁇ N_Atariloylmorpholine
- ACPI N—Atariloy Norepiperidine
- MACPI N —Methacryloylbiperidine
- ACPY N_Atarylloylpyrrolidine
- AA Acrylic acid
- HBA 2-Hydroxybutyl acrylate
- DMAA Dimethylacrylamide
- DMAPAA Dimethylaminopropylacrylamide
- DMAEA Dimethylaminoacrylate
- IPAA Isopropylacrylamide
- VP N-vinino pyrrolidone
- CHMI N-cyclohexylmaleimide
- a norbornene-based film with a thickness of 48 / im (product name Arton, manufactured by JSR Corporation) was stretched by 1.71 times at 150 ° C.
- the obtained retardation plate 1 had a thickness of 28 zm, an in-plane retardation of 140 nm, and an Nz series number of 1.55.
- a norbornene film (product name: Zeonor, manufactured by Nippon Zeon Co., Ltd.) with a thickness of 60 m is used. Uniaxially stretched by 1.28 times at ° C. The obtained retardation plate 2 has a thickness of 35 / im, an in-plane retardation of 13
- a liquid crystal coating solution was prepared by uniformly mixing 10 parts of the chiral agent represented by the formula (5), 5 parts of a photopolymerization disclosure agent (Irgacure 907, Ciba Specialty Chemicals) and 300 parts of methyl ethyl ketone.
- This liquid crystal coating solution is coated on a substrate (biaxially stretched polyethylene terephthalate film), heat-treated at 80 ° C for 3 minutes, and then irradiated with UV light to polymerize, and a cholesteric alignment solidified layer (thickness 2 / m) Formed.
- the thickness direction retardation of the cholesteric alignment solidified layer was 120 nm.
- An isocyanate-based curable adhesive (thickness: 5 ⁇ ) was applied to the cholesteric alignment solidified layer, and the retardation plate 2 was bonded through the adhesive to obtain a laminate (retardation plate 3).
- a polyisocyanate-based crosslinking agent (made by Nippon Polyurethane Industry Co., Ltd.) consisting of a trimethylolpropane adduct of tolylene diisocyanate as a crosslinking agent with respect to 100 parts of the solid content of the acrylic polymer solution obtained in Production Example 1. , Coronate L) An acrylic pressure-sensitive adhesive solution containing 0.5 part was prepared.
- PET polyethylene terephthalate
- SEG5224DU polarizing plate
- the acrylic adhesive solution A prepared in the above durability evaluation was dried on one side of a polyethylene terephthalate (PET) film (Mitsubishi Chemical Polyester Film Co., Ltd., thickness: 38 zm) subjected to silicone treatment.
- PET polyethylene terephthalate
- the subsequent pressure-sensitive adhesive layer was applied to a thickness of 25 xm and dried at 130 ° C for 3 minutes to form a pressure-sensitive adhesive layer.
- the pressure-sensitive adhesive layer was transferred to the phase difference plate 1 to prepare a phase difference plate (A) with a pressure-sensitive adhesive layer.
- the obtained phase difference plate with an adhesive layer (
- the polarizing plate with the pressure-sensitive adhesive layer (A) is bonded to the phase difference plate 1 side of A), and the polarizing plate
- Example 18 the configuration of the polarizing plate / adhesive layer / retardation plate 3 / adhesive layer was the same as in Example 18 except that the retardation plate 3 was used instead of the retardation plate 1.
- a laminated optical film with a pressure-sensitive adhesive layer (Configuration 2-2) was produced.
- a pressure-sensitive adhesive layer having a thickness of 25 ⁇ m was formed from the acrylic pressure-sensitive adhesive solution A on the liquid crystal layer side of the phase difference plate 3.
- Example 18 the type of acrylic polymer solution used for the preparation of the acrylic pressure-sensitive adhesive solution, the thickness of the pressure-sensitive adhesive layer after drying laminated on the polarizing plate, and the structure of the laminated optical film are shown in Table 3.
- a laminated optical film with a pressure-sensitive adhesive layer was produced in the same manner as Example 18 except for the change.
- the laminated optical film with the above adhesive layer is cut to 40 mm x 30 mm and attached to 0.5 mm non-acrylic glass (Coujung Co., 1737).
- the measurement wavelength was 550 nm).
- the phase difference was measured with RETS-1200V A manufactured by Otsuka Electronics.
- the Sampnole bonded to the glass was stored at 90 ° C. for 500 hours, then returned to room temperature (about 25 ° C.), and the phase difference was measured again.
- the change in phase difference was 2 nm or less compared to the initial value, “ ⁇ ” was given, and when it exceeded 2 nm, “X” was given.
- Examples 18 to 24 the (meth) acrylic polymer having a specific composition of the present invention is used as the base polymer as the pressure-sensitive adhesive layer, and the durability is good. It can be seen that even when the pressure-sensitive adhesive layer of the present invention is thin, durability can be satisfied, and in Examples 18 to 23, the change in retardation can be controlled to be small by making the pressure-sensitive adhesive layer thinner.
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Polarising Elements (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Liquid Crystal (AREA)
- Adhesive Tapes (AREA)
- Laminated Bodies (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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US12/282,757 US8932710B2 (en) | 2006-03-15 | 2007-03-13 | Adhesive optical film, multilayer optical film and image display |
CN2007800079844A CN101395508B (zh) | 2006-03-15 | 2007-03-13 | 粘合型光学薄膜、层叠光学薄膜以及图像显示装置 |
EP07738400.6A EP2006715B1 (en) | 2006-03-15 | 2007-03-13 | Adhesive optical film, multilayer optical film and image display |
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JP2006071367 | 2006-03-15 | ||
JP2006-071367 | 2006-03-15 | ||
JP2006217151A JP4140736B2 (ja) | 2006-03-15 | 2006-08-09 | 粘着型光学フィルム、積層光学フィルムおよび画像表示装置 |
JP2006-217151 | 2006-08-09 |
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WO2007108363A1 true WO2007108363A1 (ja) | 2007-09-27 |
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US (1) | US8932710B2 (ja) |
EP (1) | EP2006715B1 (ja) |
JP (1) | JP4140736B2 (ja) |
KR (1) | KR101010889B1 (ja) |
CN (1) | CN101395508B (ja) |
TW (1) | TW200801603A (ja) |
WO (1) | WO2007108363A1 (ja) |
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JP7423181B2 (ja) | 2017-09-29 | 2024-01-29 | 日東電工株式会社 | 積層体、光学部材および光学装置 |
WO2021186946A1 (ja) * | 2020-03-18 | 2021-09-23 | 日東電工株式会社 | 位相差層および粘着剤層付偏光板、ならびに、該位相差層および粘着剤層付偏光板を用いた画像表示装置 |
JP7644090B2 (ja) | 2020-03-18 | 2025-03-11 | 日東電工株式会社 | 位相差層および粘着剤層付偏光板、ならびに、該位相差層および粘着剤層付偏光板を用いた画像表示装置 |
Also Published As
Publication number | Publication date |
---|---|
EP2006715A9 (en) | 2009-07-22 |
TW200801603A (en) | 2008-01-01 |
US8932710B2 (en) | 2015-01-13 |
KR20080091256A (ko) | 2008-10-09 |
EP2006715B1 (en) | 2014-09-10 |
US20090087650A1 (en) | 2009-04-02 |
CN101395508A (zh) | 2009-03-25 |
TWI349118B (ja) | 2011-09-21 |
EP2006715A2 (en) | 2008-12-24 |
JP4140736B2 (ja) | 2008-08-27 |
KR101010889B1 (ko) | 2011-01-25 |
EP2006715A4 (en) | 2013-04-17 |
JP2007277510A (ja) | 2007-10-25 |
CN101395508B (zh) | 2010-07-21 |
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