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WO2009113537A1 - Composition adhésive pour élément optique, couche adhésive pour élément optique, élément optique adhésif, stratifié conducteur transparent, écran tactile et dispositif d'affichage d'image - Google Patents

Composition adhésive pour élément optique, couche adhésive pour élément optique, élément optique adhésif, stratifié conducteur transparent, écran tactile et dispositif d'affichage d'image Download PDF

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Publication number
WO2009113537A1
WO2009113537A1 PCT/JP2009/054545 JP2009054545W WO2009113537A1 WO 2009113537 A1 WO2009113537 A1 WO 2009113537A1 JP 2009054545 W JP2009054545 W JP 2009054545W WO 2009113537 A1 WO2009113537 A1 WO 2009113537A1
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WIPO (PCT)
Prior art keywords
pressure
sensitive adhesive
adhesive layer
optical member
weight
Prior art date
Application number
PCT/JP2009/054545
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English (en)
Japanese (ja)
Inventor
佳世 下川
敏嗣 細川
Original Assignee
日東電工株式会社
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Application filed by 日東電工株式会社 filed Critical 日東電工株式会社
Priority to KR1020097021036A priority Critical patent/KR101242336B1/ko
Priority to CN200980000287.5A priority patent/CN101679819B/zh
Publication of WO2009113537A1 publication Critical patent/WO2009113537A1/fr

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    • 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
    • C09J133/06—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • 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
    • C08G18/6258—Polymers of alpha-beta ethylenically unsaturated carboxylic acids; hydrolyzed polymers of esters of these acids the acid groups being esterified with polyhydroxy compounds or epoxy compounds during or after polymerization
    • 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
    • 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
    • C08G18/8061—Masked polyisocyanates masked with compounds having only one group containing active hydrogen
    • C08G18/8083—Masked polyisocyanates masked with compounds having only one group containing active hydrogen with compounds containing at least one heteroatom other than oxygen or nitrogen
    • C08G18/809—Masked polyisocyanates masked with compounds having only one group containing active hydrogen with compounds containing at least one heteroatom other than oxygen or nitrogen containing silicon
    • 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
    • C09J7/29—Laminated material
    • 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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B5/00—Non-insulated conductors or conductive bodies characterised by their form
    • H01B5/14—Non-insulated conductors or conductive bodies characterised by their form comprising conductive layers or films on insulating-supports
    • 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

Definitions

  • the present invention relates to a pressure-sensitive adhesive composition for optical members and a pressure-sensitive adhesive layer for optical members formed from the pressure-sensitive adhesive composition.
  • the present invention also relates to an adhesive optical member in which the optical member pressure-sensitive adhesive layer is formed on at least one surface of the optical member.
  • the adhesive-type optical member include a transparent conductive film with an adhesive layer, and the transparent conductive film with an adhesive layer is a new display such as a liquid crystal display or an electroluminescence display after being appropriately processed. Used for transparent electrodes in systems and touch panels.
  • the transparent conductive film with the pressure-sensitive adhesive layer is used for antistatic and electromagnetic wave shielding of transparent articles, liquid crystal light control glass, and transparent heaters.
  • the adhesive optical member examples include an optical film with an adhesive layer, and the optical film with an adhesive layer is used in an image display device such as a liquid crystal display device or an organic EL display device.
  • an image display device such as a liquid crystal display device or an organic EL display device.
  • the optical film a polarizing plate, a phase difference plate, an optical compensation film, a brightness enhancement film, and a film in which these are laminated can be used.
  • a so-called conductive glass in which an indium oxide thin film is formed on glass is well known.
  • conductive glass is flexible and workable because the base material is glass. It is inferior and may not be used depending on the application. Therefore, in recent years, transparent conductive films based on various plastic films including polyethylene terephthalate film have been used because of their advantages such as excellent impact resistance and light weight in addition to flexibility and workability. in use.
  • the transparent conductive film is a transparent conductive film with a pressure-sensitive adhesive layer which has a transparent conductive thin film on one side of a transparent plastic film base and has a pressure-sensitive adhesive layer on the other side of the transparent plastic film base. It is used as a transparent conductive laminate in which a transparent substrate is bonded via an adhesive layer (Patent Document 1).
  • an optical film such as a polarizing plate is generally used as an optical film with an adhesive layer in which an adhesive layer is previously provided on one side of the optical film (Patent Document 2).
  • An acrylic adhesive is mainly used for the adhesive layer applied to the optical member such as the transparent conductive film and the polarizing plate.
  • the acrylic pressure-sensitive adhesive one obtained by blending a crosslinking agent such as an isocyanate crosslinking agent with an acrylic polymer that is a base polymer is usually used.
  • a crosslinking agent such as an isocyanate crosslinking agent
  • an acrylic polymer that is a base polymer is usually used.
  • an isocyanate-based cross-linking agent there is a problem that yellowing occurs and visibility decreases under a high temperature and high temperature and high humidity environment.
  • an isocyanate crosslinking agent and a peroxide are used as the crosslinking agent, yellowing is remarkable.
  • Patent Document 2 describes that an acrylic crosslinking agent and a peroxide are used as a crosslinking agent for an acrylic polymer that is a base polymer.
  • an epoxy crosslinking agent and a peroxide are used, there is no problem of yellowing, but the crosslinking reaction with the crosslinking agent is insufficient due to the relationship with the acrylic polymer, and the adhesive layer is There are other problems that cause foaming and peeling in high temperature and high temperature and high humidity environments.
  • the transparent conductive laminate when used for a touch panel substrate for pen input such as a resistive film type, it is also required to satisfy pen dent resistance that does not cause dent or the like to the input pen. .
  • the present invention is an optical member pressure-sensitive adhesive capable of forming a pressure-sensitive adhesive layer capable of suppressing yellowing in a high-temperature and high-temperature and high-humidity environment and suppressing foaming and peeling in a high-temperature and high-temperature and high-humidity environment.
  • An object is to provide a composition.
  • this invention aims at providing the adhesive layer for optical members formed with the said adhesive composition for optical members.
  • the inventors of the present application have found that the object can be achieved by the following pressure-sensitive adhesive composition for optical members, and have completed the present invention.
  • the present invention contains 0.2 to 20 parts by weight of a carboxyl group-containing monomer as a copolymer component with respect to 100 parts by weight of an alkyl (meth) acrylate having an alkyl group having 4 to 14 carbon atoms as a monomer unit.
  • (Meth) acrylic polymer In addition, it contains 0.02 to 2 parts by weight of a peroxide and 0.005 to 5 parts by weight of an epoxy crosslinking agent as a crosslinking agent with respect to 100 parts by weight of the (meth) acrylic polymer. It is related with the adhesive composition for optical members characterized.
  • an isocyanate crosslinking agent in the pressure-sensitive adhesive composition for an optical member, 0.01 to 0.5 parts by weight of an isocyanate crosslinking agent can be further contained as a crosslinking agent with respect to 100 parts by weight of the (meth) acrylic polymer.
  • the pressure-sensitive adhesive composition for an optical member may further contain 0.01 to 1 part by weight of a silane coupling agent with respect to 100 parts by weight of the (meth) acrylic polymer.
  • the (meth) acrylic polymer further contains 0.01 to 5 parts by weight of a hydroxyl group-containing monomer as a monomer unit with respect to 100 parts by weight of an alkyl (meth) acrylate. Things can be used.
  • the present invention also relates to a pressure-sensitive adhesive layer for optical members, characterized by being formed from the pressure-sensitive adhesive composition for optical members.
  • the optical material pressure-sensitive adhesive layer preferably has a storage elastic modulus (G ′) at 23 ° C. of 20000 to 500,000 Pa.
  • the optical material pressure-sensitive adhesive layer preferably has a gel fraction of 70 to 98% by weight.
  • the present invention also relates to an adhesive optical member, wherein the optical member pressure-sensitive adhesive layer is formed on at least one surface of the optical member.
  • the pressure-sensitive adhesive layer and the optical member are preferably laminated via an anchor layer.
  • the anchor layer preferably contains a polymer.
  • the adhesive optical member examples include an adhesive layer on one surface of the first transparent plastic film substrate, and a transparent conductive thin film on the other surface of the first transparent plastic film substrate.
  • the transparent conductive thin film can be provided on one surface of the first transparent plastic film substrate via at least one undercoat layer.
  • the present invention also relates to a transparent conductive laminate, wherein a second transparent plastic film substrate is further bonded to the pressure-sensitive adhesive layer in the transparent conductive film with the pressure-sensitive adhesive layer.
  • the second transparent plastic film substrate may have a hard coat layer on one side or both sides.
  • the present invention also relates to a touch panel, wherein the transparent conductive film with a pressure-sensitive adhesive layer or the transparent conductive laminate is used as a transparent conductive film for a touch panel.
  • examples of the adhesive optical member include an optical film with an adhesive layer in which the adhesive optical member has an adhesive layer on at least one surface of an optical film for an image display device.
  • the optical film a polarizing plate or a retardation plate can be preferably used.
  • the present invention also relates to an image display device characterized in that at least one adhesive-type optical member according to the optical film with an adhesive layer is used.
  • the pressure-sensitive adhesive composition for an optical member of the present invention comprises a (meth) acrylic polymer containing a predetermined amount of a carboxyl group-containing monomer, and a predetermined amount of peroxide and an epoxy-based crosslinking agent as a crosslinking agent.
  • a pressure-sensitive adhesive layer that can suppress yellowing in a high-temperature and high-temperature and high-humidity environment and can suppress foaming and peeling in a high-temperature and high-temperature and high-humidity environment. Can be formed.
  • the said adhesive layer is used in various adhesive type optical members, when it applies to a transparent conductive film with an adhesive layer, for example, pen dent resistance can be satisfied.
  • isocyanate cross-linking agents are susceptible to hydrogen abstraction reaction under high temperature and high temperature and high humidity environment.
  • aromatic isocyanate cross-linking agents have a quinoneimide structure (a yellow structure).
  • the pressure sensitive adhesive using is easy to yellow.
  • an isocyanate-based crosslinking agent is used in the presence of peroxide, the yellowing of the pressure-sensitive adhesive is remarkable.
  • yellowing is suppressed even when a peroxide is used by using an epoxy-based crosslinking agent as a crosslinking agent for an adhesive.
  • an epoxy type crosslinking agent when an epoxy type crosslinking agent is used, yellowing can be suppressed even when a predetermined amount of an isocyanate type crosslinking agent is used in combination.
  • the peroxide generates radicals by heating to cause crosslinking of the main chain of the (meth) acrylic polymer, while the epoxy crosslinking agent is introduced as a copolymerization component in the (meth) acrylic polymer.
  • Crosslinking is caused by reaction with a carboxyl group derived from a carboxyl group-containing monomer.
  • a pressure-sensitive adhesive composition using a peroxide and an epoxy-based crosslinking agent as a crosslinking agent for a carboxyl group-containing (meth) acrylic polymer is used as a crosslinking agent. It is easy to set the gel fraction and storage elastic modulus of the pressure-sensitive adhesive layer higher by blending a small amount of the cross-linking agent than the pressure-sensitive adhesive composition using the isocyanate-based cross-linking agent. Therefore, in the case of using an isocyanate crosslinking agent together with an epoxy crosslinking agent, the ratio of the isocyanate crosslinking agent can be suppressed, and foaming and peeling in a high temperature and high temperature and high humidity environment can be suppressed while suppressing yellowing. Occurrence can be suppressed. Moreover, in a transparent conductive film with an adhesive layer, pen dent resistance can be improved.
  • the pressure-sensitive adhesive composition for an optical member of the present invention comprises 0.2 to 20 parts by weight of a carboxyl group-containing monomer as a monomer unit with respect to 100 parts by weight of an alkyl (meth) acrylate having an alkyl group having 4 to 14 carbon atoms.
  • a (meth) acrylic polymer contained as a copolymerization component is used as the base polymer.
  • the alkyl group of the alkyl (meth) acrylate may be either linear or branched.
  • the alkyl group preferably has 4 to 12 carbon atoms, more preferably 4 to 9 carbon atoms.
  • (Meth) acrylate refers to acrylate and / or methacrylate, and (meth) of the present invention has the same meaning.
  • alkyl (meth) acrylates include n-butyl (meth) acrylate, s-butyl (meth) acrylate, t-butyl (meth) acrylate, isobutyl (meth) acrylate, n-pentyl (meth) acrylate, isopentyl (Meth) acrylate, hexyl (meth) acrylate, heptyl (meth) acrylate, isoamyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, n-octyl (meth) acrylate, isooctyl (meth) acrylate, n-nonyl ( (Meth) acrylate, isononyl (meth) acrylate, n-decyl (meth) acrylate, isodecyl (meth) acrylate, n-dodecyl (meth)
  • carboxyl group-containing monomer a monomer having a polymerizable functional group having an unsaturated double bond such as a (meth) acryloyl group or a vinyl group and having a carboxyl group can be used without particular limitation.
  • the carboxyl group-containing monomer include acrylic acid, methacrylic acid, carboxyethyl (meth) acrylate, carboxypentyl (meth) acrylate, itaconic acid, maleic acid, fumaric acid, crotonic acid, and the like, either alone or in combination. Can be used. Among these, acrylic acid and methacrylic acid are preferable, and acrylic acid is particularly preferable.
  • the carboxyl group-containing monomer is used in a proportion of 0.2 to 20 parts by weight with respect to 100 parts by weight of alkyl (meth) acrylate.
  • the proportion of the carboxyl group-containing monomer is preferably 1 to 15 parts by weight, and more preferably 3 to 10 parts by weight.
  • the proportion of the carboxyl group-containing monomer is too small, the crosslinking reaction with the epoxy-based crosslinking agent becomes insufficient, and the pressure-sensitive adhesive layer formed from the pressure-sensitive adhesive composition is foamed and peeled off in a high temperature and high temperature and high humidity environment.
  • a hydroxyl group-containing monomer can be used as a copolymerization component in the (meth) acrylic polymer.
  • a monomer having a polymerizable functional group having an unsaturated double bond such as a (meth) acryloyl group or a vinyl group and having a hydroxyl group can be used without particular limitation.
  • hydroxyl group-containing monomer examples include 2-hydroxyethyl (meth) acrylate, 2-hydroxybutyl (meth) acrylate, 3-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, 6-hydroxyhexyl ( Hydroxyalkyl (meth) acrylates such as (meth) acrylate, 8-hydroxyoctyl (meth) acrylate, 10-hydroxydecyl (meth) acrylate, 12-hydroxylauryl (meth) acrylate; hydroxyethyl (meth) acrylamide, and others (4 -Hydroxymethylcyclohexyl) methyl acrylate, N-methylol (meth) acrylamide, N-hydroxy (meth) acrylamide, allyl alcohol, 2-hydroxyethyl vinyl ether , 4-hydroxybutyl vinyl ether, diethylene glycol such as monovinyl ether. These may be used alone or in combination. Of these, hydroxyalkyl (me
  • the proportion of the hydroxyl group-containing monomer used is preferably 5 parts by weight or less with respect to 100 parts by weight of alkyl (meth) acrylate.
  • the proportion of the hydroxyl group-containing monomer is preferably 0.01 to 5 parts by weight, and more preferably 0.01 to 2 parts by weight.
  • the durability can be further improved by using the hydroxyl group-containing monomer within the above range.
  • a copolymerization component for forming the (meth) acrylic polymer in addition to the monomers, for the purpose of improving adhesiveness and the like, monomers other than those described above may be substituted with alkyl (meta ) It can be used in the range of 50 parts by weight or less with respect to 100 parts by weight of acrylate.
  • the ratio of the optional monomer is preferably 20 parts by weight or less.
  • the optional monomer examples include monomers containing acid anhydride groups such as maleic anhydride and itaconic anhydride; caprolactone adducts of acrylic acid; styrene sulfonic acid and allyl sulfonic acid, 2- (meth) acrylamide-2-methylpropane
  • examples include sulfonic acid group-containing monomers such as sulfonic acid, (meth) acrylamide propane sulfonic acid, sulfopropyl (meth) acrylate, and (meth) acryloyloxynaphthalene sulfonic acid; and phosphoric acid group-containing monomers such as 2-hydroxyethylacryloyl phosphate. .
  • (N-substituted) amides such as (meth) acrylamide, N, N-dimethyl (meth) acrylamide, N-butyl (meth) acrylamide, N-methylol (meth) acrylamide, N-methylolpropane (meth) acrylamide, etc.
  • Further modifying monomers include vinyl acetate, vinyl propionate, N-vinyl pyrrolidone, methyl vinyl pyrrolidone, vinyl pyridine, vinyl piperidone, vinyl pyrimidine, vinyl piperazine, vinyl pyrazine, vinyl pyrrole, vinyl imidazole, vinyl oxazole, vinyl morpholine, N- Vinyl monomers such as vinylcarboxylic amides, styrene, ⁇ -methylstyrene, N-vinylcaprolactam; cyanoacrylate monomers such as acrylonitrile and methacrylonitrile; epoxy group-containing acrylic monomers such as glycidyl (meth) acrylate; (Meth) acrylic acid polyethylene glycol, (meth) acrylic acid polypropylene glycol, (meth) acrylic acid methoxyethylene glycol, (meth) acrylic acid meso Glycol acrylic ester monomers such as xypolypropylene glycol; acrylic ester monomers such as
  • the (meth) acrylic polymer of the present invention usually has a weight average molecular weight in the range of 1 million to 3 million. In view of durability, particularly heat resistance, it is preferable to use those having a weight average molecular weight of 1.5 million to 2.5 million. Further, it is more preferably 1.7 million to 2.5 million, and further preferably 1.8 million to 2.5 million. A weight average molecular weight of less than 1,500,000 is not preferable in terms of heat resistance. Moreover, when a weight average molecular weight becomes larger than 3 million, it is unpreferable also at the point which bonding property and adhesive force fall.
  • the weight average molecular weight is a value measured by GPC (gel permeation chromatography) and calculated in terms of polystyrene.
  • 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. Further, the (meth) acrylic polymer obtained may be any of a random copolymer, a block copolymer, a graft copolymer, and the like.
  • solution polymerization for example, ethyl acetate, toluene or the like is used as a polymerization solvent.
  • the reaction is carried out under an inert gas stream such as nitrogen and a polymerization initiator is added, usually at about 50 to 70 ° C. under reaction conditions for 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 a (meth) acrylic-type polymer can be controlled by the usage-amount of a polymerization initiator and a chain transfer agent, and reaction conditions, The usage-amount is suitably adjusted according to these kinds.
  • the pressure-sensitive adhesive composition for optical members of the present invention contains a peroxide and an epoxy-based crosslinking agent as a crosslinking agent.
  • the peroxide of the present invention can be used as appropriate as long as it generates radical active species by heating and proceeds with crosslinking of the (meth) acrylic polymer in the pressure-sensitive adhesive composition.
  • Examples of the peroxide used in the present invention include di (2-ethylhexyl) peroxydicarbonate (1 minute half-life temperature: 90.6 ° C.), di (4-t-butylcyclohexyl) peroxydicarbonate ( 1 minute half-life temperature: 92.1 ° C.), di-sec-butyl peroxydicarbonate (1 minute half-life temperature: 92.4 ° C.), t-butyl peroxyneodecanoate (1 minute half-life temperature: 103.5 ° C), t-hexylperoxypivalate (1 minute half-life temperature: 109.1 ° C), t-butyl peroxypivalate (1 minute half-life temperature: 110.3 ° C), dilauroyl peroxide (1 minute half-life temperature: 116.4 ° C.), di-n-octanoyl peroxide (1 minute half-life temperature: 117.4 ° C.), 1,1,3,3-tetramethylbutyl Oxy-2
  • di (4-t-butylcyclohexyl) peroxydicarbonate (1 minute half-life temperature: 92.1 ° C.)
  • dilauroyl peroxide (1 minute half-life temperature: 116. 4 ° C)
  • dibenzoyl peroxide (1 minute half-life temperature: 130.0 ° C) and the like are preferably used.
  • the peroxide half-life is an index representing the decomposition rate of the peroxide, and means the time until the remaining amount of peroxide is reduced to half.
  • 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 peroxide catalog 9th edition of Nippon Oil & Fats Co., Ltd.” (May 2003) ".
  • the peroxide may be used alone or as a mixture of two or more thereof.
  • the total amount of the peroxide is 100% of the (meth) acrylic polymer 100.
  • the amount is 0.02 to 2 parts by weight, preferably 0.04 to 1.5 parts by weight, more preferably 0.05 to 1 part by weight, based on parts by weight.
  • the blending amount is too small, the cross-linking is insufficient and the durability is not sufficient.
  • the amount is too large, crosslinking is excessive and the adhesiveness is poor.
  • a peroxide when used as a polymerization initiator, it is possible to use the remaining peroxide for the crosslinking reaction without being used in the polymerization reaction. If necessary, it can be added again and used in a predetermined amount of peroxide.
  • the peroxide decomposition amount remaining after the reaction treatment for example, it can be measured by HPLC (high performance liquid chromatography).
  • the pressure-sensitive adhesive composition after the reaction treatment was taken out, immersed in 10 ml of ethyl acetate, extracted by shaking at 25 ° C. and 120 rpm for 3 hours with a shaker, and then room temperature. Leave for 3 days. Next, 10 ml of acetonitrile was added, shaken at 120 rpm at 25 ° C. for 30 minutes, and about 10 ⁇ l of the extract obtained by filtration through a membrane filter (0.45 ⁇ m) was injected into the HPLC for analysis. The amount of peroxide can be set.
  • the epoxy-based crosslinking agent is an epoxy compound having two or more epoxy groups (glycidyl groups) in one molecule.
  • examples of the epoxy-based crosslinking agent include ethylene glycol diglycidyl ether, propylene glycol diglycidyl ether, diglycidyl terephthalate, spiroglycol diglycidyl ether, diglycidylaminomethylcyclohexane, tetraglycidylxylenediamine, and polyglycidylmetaxylene. Examples include diamines.
  • These epoxy crosslinking agents may be used alone or in combination of two or more.
  • the compounding amount of the epoxy crosslinking agent is 0.005 to 0.5 parts by weight and 0.01 to 0.2 parts by weight with respect to 100 parts by weight of the (meth) acrylic polymer. Preferably, 0.02 to 0.1 part by weight is contained.
  • the pressure-sensitive adhesive layer formed from the pressure-sensitive adhesive composition may be foamed or peeled off in a high temperature and high temperature and high humidity environment, and when applied to a transparent conductive film with a pressure sensitive adhesive layer. Pen dents are easily formed, which is not preferable as an adhesive layer for a touch panel.
  • the amount is too large, crosslinking is excessive and the adhesiveness is poor.
  • cross-linking agents in addition to a peroxide and an epoxy-based cross-linking agent, other cross-linking agents are used together as a cross-linking agent, and foaming and peeling occur in a high temperature and high temperature and high humidity environment. Can be suppressed.
  • Other crosslinking agents include isocyanate crosslinking agents, amine crosslinking agents, aldehyde crosslinking agents, hydrazine crosslinking agents, aziridine crosslinking agents, imine crosslinking agents, polyvalent metal salts, polyvalent metal alkoxides, polyvalent ammonium. A salt or the like can be used.
  • an isocyanate-based cross-linking agent is preferable because it can improve the adhesion to the first transparent plastic film substrate.
  • the above arbitrary crosslinking agent is usually used in an amount of 0.5 parts by weight or less with respect to 100 parts by weight of the (meth) acrylic polymer.
  • Isocyanate crosslinking agents include aromatic diisocyanates such as tolylene diisocyanate, chlorophenylene diisocyanate, 2,4-tolylene diisocyanate, 4,4'-diphenylmethane diisocyanate, xylylene diisocyanate, polymethylene polyphenyl isocyanate; tetramethylene diisocyanate Lower aliphatic reisocyanates such as hexamethylene diisocyanate; cyclopentylene diisocyanate, cyclohexylene diisocyanate, isophorone diisocyanate, alicyclic isocyanates such as hydrogenated aromatic diisocyanates; Adduct isocyanate compounds with addition of polyhydric alcohols such as trimethylolpropane, isocyanurate Things, biuret type compounds, further polyether polyols, polyester polyols, acrylic polyols, polybutadiene polyols, polyisocyanate ure
  • An isocyanate type crosslinking agent may be used individually by 1 type, and may mix and use 2 or more types.
  • isocyanate-based cross-linking agents adducts to which aromatic diisocyanates such as tolylene diisocyanate and polyhydric alcohols such as trimethylolpropane are added from the viewpoint of improving adhesion to the first transparent plastic film substrate.
  • System isocyanates are preferred.
  • the blending amount is preferably 0.01 to 0.5 parts by weight, preferably 0.05 to 0.5 parts by weight with respect to 100 parts by weight of the (meth) acrylic polymer. It is more preferable to contain 0.3 part by weight. When the blending amount exceeds 0.5 parts by weight, the pressure-sensitive adhesive layer is yellowed under high temperature and high temperature and high humidity environment, and visibility is deteriorated.
  • silane coupling agent can be used in the pressure-sensitive adhesive composition of the present invention 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. It is preferably 1 part by weight or less of the silane coupling agent, preferably 0.01 to 1 part by weight, more preferably 0.02 to 0.6 part by weight, More preferably, it is contained in an amount of ⁇ 0.3 parts by weight.
  • the compounding amount of the silane coupling agent exceeds 1 part by weight, when the adherend is glass, the adhesive force is excessively increased, which may cause rework failure.
  • the pressure-sensitive adhesive composition of the present invention may contain other known additives, such as powders such as colorants and pigments, dyes, surfactants, plasticizers, tackifiers, Use surface lubricants, leveling agents, softeners, antioxidants, anti-aging agents, light stabilizers, UV absorbers, polymerization inhibitors, inorganic or organic fillers, metal powders, particles, foils, etc. It can be added appropriately depending on the application. Moreover, you may employ
  • a pressure-sensitive adhesive layer is formed by the pressure-sensitive adhesive composition of the present invention.
  • the pressure-sensitive adhesive composition is applied to a release film, and the pressure-sensitive adhesive layer is formed by drying and removing the polymerization solvent, and then the optical member (for example, the pressure-sensitive adhesive layer).
  • a transparent transparent conductive film with a first transparent plastic film substrate, an optical film with a pressure-sensitive adhesive layer, or an optical film for an image display device), or an optical member coated with the pressure-sensitive adhesive composition, and a polymerization solvent Are removed by drying to form an adhesive layer on the optical member.
  • one or more solvents other than the polymerization solvent may be added as appropriate.
  • Various methods are used as a method for forming the pressure-sensitive adhesive layer. Specifically, for example, 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, etc. 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 100 ⁇ m.
  • the thickness is preferably 5 to 50 ⁇ m, more preferably 10 to 30 ⁇ m.
  • the thickness of the pressure-sensitive adhesive layer becomes too thin, pen dents are easily formed when applied to a transparent conductive film with a pressure-sensitive adhesive layer, which is not preferable as a pressure-sensitive adhesive layer for a touch panel.
  • it is too thick the transparency is impaired, and it is difficult to obtain good results in terms of formation of an adhesive layer, bonding workability to various adherends, and cost.
  • the pressure-sensitive adhesive layer When the pressure-sensitive adhesive layer is exposed, the pressure-sensitive adhesive layer may be protected with a release film (separator) until practical use.
  • the constituent material of the release film examples 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.
  • 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.
  • a plastic film is preferably used from the viewpoint of excellent surface smoothness.
  • the plastic film is not particularly limited as long as it can protect the pressure-sensitive adhesive layer.
  • a polyethylene film, a polypropylene film, a polybutene film, a polybutadiene film, a polymethylpentene film, a polyvinyl chloride film, and a vinyl chloride co-polymer are used.
  • examples thereof include a polymer film, a polyethylene terephthalate film, a polybutylene terephthalate film, a polyurethane film, and an ethylene-vinyl acetate copolymer film.
  • the thickness of the release film is usually about 5 to 200 ⁇ m, preferably about 5 to 100 ⁇ m.
  • release and antifouling treatment with a silicone-based, fluorine-based, long-chain alkyl-based or fatty acid amide-based release agent, silica powder, etc., coating type, kneading type, An antistatic treatment such as a vapor deposition type can also be performed.
  • the release property from the pressure-sensitive adhesive layer 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 release film.
  • the release film used in the preparation of the above-mentioned pressure-sensitive adhesive layer can be used as it is as a release film for the pressure-sensitive adhesive layer, and the process can be simplified.
  • the pressure-sensitive adhesive layer is crosslinked with a crosslinking agent.
  • a peroxide and an epoxy-based crosslinking agent are used as the crosslinking agent, but it is preferable to sufficiently consider the influence of the crosslinking treatment temperature and the crosslinking treatment time as well as adjusting the addition amount thereof.
  • the adjustment of the crosslinking treatment temperature and the crosslinking treatment time is, for example, preferably set so that the decomposition amount of the peroxide contained in the pressure-sensitive adhesive composition is 50% by weight or more, and is set to be 60% by weight or more. It is more preferable to set it to 70% by weight or more.
  • the peroxide decomposition amount is less than 50% by weight, the amount of peroxide remaining in the pressure-sensitive adhesive composition increases, and a crosslinking reaction over time may occur even after the crosslinking treatment.
  • the crosslinking treatment temperature is 1 minute half-life temperature
  • the decomposition amount of peroxide is 50% by weight in 1 minute
  • the decomposition amount of peroxide is 75% by weight in 2 minutes.
  • a crosslinking treatment time of 1 minute or more is required.
  • the half-life of the peroxide at the crosslinking treatment temperature is 30 seconds
  • a crosslinking treatment time of 30 seconds or more is required.
  • the half-life of the peroxide at the crosslinking treatment temperature If the (half time) is 5 minutes, a crosslinking treatment 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. It can be adjusted as appropriate.
  • crosslinking treatment may be performed at the temperature during the drying step of the pressure-sensitive adhesive layer, or may be performed by providing a separate crosslinking treatment step after the drying step.
  • the crosslinking treatment time can be set in consideration of productivity and workability, but is usually about 0.2 to 20 minutes, preferably about 0.5 to 10 minutes.
  • the pressure-sensitive adhesive layer preferably has a storage elastic modulus (G ′) at 23 ° C. of 20000 to 500,000 Pa.
  • the storage elastic modulus (G ′) of the pressure-sensitive adhesive layer is more preferably 70000 to 200000 Pa, and more preferably 80000 to 18000 Pa. Is preferred.
  • the storage elastic modulus (G ′) of the pressure-sensitive adhesive layer is more preferably 30000 to 200000 Pa from the viewpoint of suppressing unevenness and the like. Further, it is preferably 70,000 to 200,000 Pa, and more preferably 75,000 to 150,000 Pa.
  • the storage elastic modulus (G ′) is less than 20000 Pa, it is not preferable in terms of appearance defects and foaming at the time of heating, and when applied as a transparent conductive film with an adhesive layer, pen dents are likely to be formed. It is not preferable as an adhesive layer for a touch panel. On the other hand, it is not preferable that the storage elastic modulus (G ′) is larger than 500,000 Pa because adhesiveness is poor.
  • the storage elastic modulus (G ′) in the present invention is one of dynamic mechanical characteristics, and is described in JIS-K-7244-1 plastic dynamic mechanical characteristics test method-Part 1: General rules.
  • G ′ means a value obtained by the torsional deformation mode in Part 2 of Table 4 of JIS-K7244-1. Specifically, the method described in the examples was used.
  • the stress as the amount of energy per unit volume
  • the storage elastic modulus G ′ corresponds to a stored portion
  • the loss elastic modulus G ′′ corresponds to a portion lost due to internal friction
  • G ′ indicates the degree of hardness
  • G ′ indicates the degree of stress with respect to the force applied to the adhesive layer from the outside. If G ′ is large, the generated stress increases and the warpage of the glass also increases. Conversely, if it is small, it is too soft and inferior in workability and workability.
  • the pressure-sensitive adhesive layer preferably has a gel fraction of 70 to 98% by weight.
  • the gel fraction of the pressure-sensitive adhesive layer is preferably 85 to 98% by weight, and more preferably 88 to 95% by weight.
  • pen dents are easily formed, which is not preferable as a pressure-sensitive adhesive layer for a touch panel.
  • the gel fraction was measured according to the description in the examples.
  • the anchor layer is formed on the surface of the optical member or the pressure-sensitive adhesive layer is formed after various easy-adhesion treatments such as corona treatment and plasma treatment are performed. can do. Moreover, you may perform an easily bonding process on the surface of an adhesive layer.
  • an anchor layer is preferable, and the adhesive layer and the optical member are preferably laminated by the anchor layer.
  • the adhesive layer can improve the anchoring force by the anchor layer.
  • the anchor layer is usually provided on the optical member side.
  • the anchor layer forming agent is not particularly limited as long as it can improve the anchoring force of the adhesive.
  • a silane coupling agent having a reactive functional group such as amino group, vinyl group, epoxy group, mercapto group, chloro group and hydrolyzable alkoxysilyl group in the same molecule, the same molecule Titanate coupling agent having hydrolyzable hydrophilic group and organic functional group containing titanium in the inside, and aluminum having hydrolyzable hydrophilic group and organic functional group containing aluminum in the same molecule
  • organic reactive groups such as so-called coupling agents such as nate coupling agents, epoxy resins, isocyanate resins, polyurethane resins, polyester resins, polymers containing amino groups in the molecule, and ester urethane resins.
  • Resin (polymer) can be used.
  • the anchor layer can be appropriately selected and used depending on the adhesive optical member.
  • the adhesive optical member is a transparent conductive film with an adhesive layer, it is industrially easy to handle.
  • a layer containing a silane coupling agent is particularly preferred.
  • the anchor layer forming material is preferably a polymer, such as a polyurethane resin, a polyester resin, or a polymer containing an amino group in the molecule.
  • a polymer such as a polyurethane resin, a polyester resin, or a polymer containing an amino group in the molecule.
  • Polymers containing an amino group in the molecule ensure good adhesion because the amino group in the molecule exhibits an interaction such as a reaction or ionic interaction with the carboxyl group in the pressure-sensitive adhesive.
  • polymers containing an amino group in the molecule include polymers of amino-containing group-containing monomers such as polyethyleneimine, polyallylamine, polyvinylamine, polyvinylpyridine, polyvinylpyrrolidine, and dimethylaminoethyl acrylate.
  • An antistatic agent can be added to the anchor layer in order to impart antistatic properties.
  • Antistatic agents for imparting antistatic properties include ionic surfactant systems, conductive polymer systems such as polyaniline, polythiophene, polypyrrole, and polyquinoxaline, metal oxide systems such as tin oxide, antimony oxide, and indium oxide.
  • a conductive polymer system is preferably used.
  • water-soluble conductive polymers such as polyaniline and polythiophene or water-dispersible conductive polymers are particularly preferably used.
  • the thickness of the anchor layer is not particularly limited and is, for example, about 2 to 200 nm.
  • the thickness is preferably 5 to 150 nm, more preferably 10 to 100 nm.
  • the anchor layer can be formed, for example, by applying an anchor layer forming material to the optical member and drying it.
  • FIG. 1 is a cross-sectional view showing an example of an adhesive optical member of the present invention.
  • a release film 4 is provided on one surface of the optical member 1 with an optical member pressure-sensitive adhesive layer 3 interposed therebetween.
  • another layer 2 can be provided on the other surface of the optical member 1.
  • the other layer 2 may be the pressure-sensitive adhesive layer 3.
  • the adhesive layer 3 and the optical member 1 may be laminated
  • FIG. 4 is a cross-sectional view showing an example of the transparent conductive film with an adhesive layer of the present invention.
  • the transparent conductive film with a pressure-sensitive adhesive layer in FIG. 4 has a transparent conductive thin film 12 on one surface of a first transparent plastic film substrate 11 which is an optical member, and the first transparent plastic film substrate 11 A release film 14 is provided on the other surface of the film with an adhesive layer 13 interposed therebetween.
  • FIG. 5 shows a case where the transparent conductive thin film 12 is provided on one surface of the first transparent plastic film substrate 11 with an undercoat layer 15 in the transparent conductive film with an adhesive layer of FIG. It is. In FIG. 5, one undercoat layer 15 is shown, but a plurality of undercoat layers 15 can be provided.
  • a release film 14 is provided via an adhesive layer 13.
  • the first transparent plastic film substrate 11 is not particularly limited, but various plastic films having transparency are used.
  • the plastic film is formed of a single layer film.
  • the materials include polyester resins such as polyethylene terephthalate and polyethylene naphthalate, acetate resins, polyethersulfone resins, polycarbonate resins, polyamide resins, polyimide resins, polyolefin resins, (meth) acrylic resins.
  • polyester resins, polyimide resins and polyethersulfone resins are particularly preferable.
  • a polymer film described in JP-A No. 2001-343529 for example, (A) a thermoplastic resin having a substituted and / or unsubstituted imide group on the side chain, and (B) a side chain.
  • a thermoplastic resin having a substituted and / or unsubstituted imide group on the side chain examples thereof include resin compositions containing a substituted and / or unsubstituted phenyl and a thermoplastic resin having a nitrile group.
  • a polymer film of a resin composition containing an alternating copolymer composed of isobutylene and N-methylmaleimide and an acrylonitrile / styrene copolymer can be used.
  • the thickness of the film substrate 11 is preferably 15 to 200 ⁇ m, and more preferably 25 to 188 ⁇ m. If the thickness of the film substrate 11 is less than 15 ⁇ m, the mechanical strength of the film substrate 11 is insufficient, and it is difficult to form the film substrate 11 in a roll shape and continuously form the transparent conductive thin film 12. It may become. On the other hand, when the thickness exceeds 200 ⁇ m, the input amount is reduced in the film forming process of the transparent conductive thin film 12, and the gas and moisture removal process may be adversely affected to impair productivity.
  • the film base 11 is subjected to etching treatment or undercoating treatment such as sputtering, corona discharge, flame, ultraviolet irradiation, electron beam irradiation, chemical conversion, oxidation, etc. on the surface in advance, and the transparent conductive thin film 12 provided thereon or You may make it improve the adhesiveness with respect to the said film base material 11 of the undercoat layer 15.
  • etching treatment or undercoating treatment such as sputtering, corona discharge, flame, ultraviolet irradiation, electron beam irradiation, chemical conversion, oxidation, etc.
  • the constituent material of the transparent conductive thin film 12 is not particularly limited, and gold oxide such as indium oxide containing tin oxide and tin oxide containing antimony is preferably used.
  • indium oxide containing tin oxide is suitable.
  • the metal oxide preferably contains 90 to 99% by weight of indium oxide and 1 to 10% by weight of tin oxide.
  • the thickness of the transparent conductive thin film 12 is not particularly limited, but is preferably 10 nm or more in order to obtain a continuous film having good conductivity of 1 ⁇ 10 3 ⁇ / ⁇ or less.
  • the film thickness is preferably 15 to 35 nm, more preferably in the range of 20 to 30 nm, since transparency is lowered when the film thickness becomes too thick.
  • the thickness is less than 15 nm, the surface electrical resistance increases and it becomes difficult to form a continuous film. Moreover, when it exceeds 35 nm, transparency will fall.
  • the method for forming the transparent conductive thin film 12 is not particularly limited, and a conventionally known method can be employed. Specifically, for example, a vacuum deposition method, a sputtering method, and an ion plating method can be exemplified. In addition, an appropriate method can be adopted depending on the required film thickness.
  • the undercoat layer 15 can be formed of an inorganic material, an organic material, or a mixture of an inorganic material and an organic material.
  • NaF 1.3
  • Na 3 AlF 6 (1.35)
  • LiF (1.36 LiF (1.36)
  • MgF 2 (1.38)
  • CaF 2 1.4
  • BaF 2 (1. 3)
  • inorganic substances such as SiO 2 (1.46), LaF 3 (1.55), CeF 3 (1.63), Al 2 O 3 (1.63) [the values in parentheses for the above materials are It is the refractive index of light].
  • SiO 2 , MgF 2 , A1 2 O 3 and the like are preferably used.
  • SiO 2 is suitable.
  • a composite oxide containing about 10 to 40 parts by weight of cerium oxide and about 0 to 20 parts by weight of tin oxide with respect to indium oxide can be used.
  • the undercoat layer formed of an inorganic material can be formed as a dry process such as a vacuum deposition method, a sputtering method, or an ion plating method, or by a wet method (coating method).
  • a dry process such as a vacuum deposition method, a sputtering method, or an ion plating method, or by a wet method (coating method).
  • SiO 2 is preferable as described above.
  • an SiO 2 film can be formed by applying silica sol or the like.
  • organic substances examples include acrylic resins, urethane resins, melamine resins, alkyd resins, siloxane polymers, and organic silane condensates. At least one of these organic substances is used.
  • the organic substance it is desirable to use a thermosetting resin made of a mixture of a melamine resin, an alkyd resin, and an organosilane condensate.
  • the first undercoat layer from the transparent plastic film substrate 11 is formed of an organic material, and the undercoat layer farthest from the transparent plastic film substrate 11 is It is preferable from the point of the workability of the transparent conductive film with an adhesive layer obtained that it is formed with the inorganic substance. Therefore, when the undercoat layer 15 has two layers, it is preferable that the first undercoat layer from the transparent plastic film substrate 11 is formed of an organic material and the second layer is formed of an inorganic material.
  • the thickness of the undercoat layer 15 is not particularly limited, but is usually about 1 to 300 nm, preferably 5 to 300 nm, from the viewpoint of optical design and the effect of preventing oligomer generation from the film substrate 11. It is. When two or more undercoat layers 15 are provided, the thickness of each layer is about 5 to 250 nm, preferably 10 to 250 nm.
  • an oligomer migration preventing layer between the film substrate 11 and the pressure-sensitive adhesive layer 13.
  • a formation material of the said transition prevention layer the appropriate thing which can form a transparent film
  • An inorganic substance, organic substance, or those composite materials may be used.
  • the film thickness is preferably 0.01 to 20 ⁇ m.
  • a coating method using a coater, a spray method, a spin coating method, an in-line coating method, etc. are often used to form the migration prevention layer, but a vacuum deposition method, a sputtering method, an ion plating method, a spray pyrolysis method, etc.
  • a method such as a method, a chemical plating method, or an electroplating method may be used.
  • a resin component such as an acrylic resin, a urethane resin, a melamine resin, a UV curable resin, and an epoxy resin, or a mixture of these inorganic particles such as alumina, silica, and mica may be used.
  • the base material component may have a function of a migration preventing layer by coextrusion of two or more layers of the polymer substrate.
  • a metal made of cobalt or tin or an alloy thereof, or a metal oxide made of indium oxide, tin oxide, titanium oxide, cadmium oxide or a mixture thereof, or another metal compound made of steel iodide etc. can be used. .
  • the adhesive layer 13 can improve the anchoring force by the anchor layer a as described above.
  • the anchor layer is usually provided on the film substrate 11 side.
  • the method for producing a transparent conductive film with a pressure-sensitive adhesive layer of the present invention is not particularly limited as long as the method described above is obtained.
  • the pressure-sensitive adhesive layer 13 produced a transparent conductive film by forming a transparent conductive thin film 12 (which may include an undercoat layer 15) on one surface of the first transparent plastic film substrate 11. Thereafter, it is formed on the other surface of the transparent conductive film.
  • the pressure-sensitive adhesive layer 13 may be directly formed on the film base 11, or the pressure-sensitive adhesive layer 13 may be provided on the release film 14 and may be bonded to the film base 11. The latter method is more advantageous in terms of productivity because the pressure-sensitive adhesive layer 13 can be continuously formed with the film substrate 11 in a roll shape.
  • the transparent conductive film with the pressure-sensitive adhesive layer may be formed into a transparent conductive laminate as shown in FIG. 6 by further bonding a second transparent plastic film substrate 11 ′ to the pressure-sensitive adhesive layer 13. it can.
  • the second transparent plastic film substrate 11 ' is bonded by providing an adhesive layer 13 on the second transparent plastic film substrate 11' and bonding the film substrate 11 to the adhesive layer 13.
  • the pressure-sensitive adhesive layer 13 may be provided on the film base 11 and the second transparent plastic film base 11 ′ may be bonded thereto. In the latter method, the pressure-sensitive adhesive layer 13 can be continuously formed with the film substrate 11 in a roll shape, which is more advantageous in terms of productivity.
  • the second transparent plastic film substrate 11 ′ can have a single layer structure, and two or more second transparent plastic film substrates 11 ′ can be formed by a transparent adhesive layer. As a bonded composite structure, the mechanical strength of the entire laminate can be further improved.
  • the second transparent plastic film base material 11 ′ is bonded to the transparent conductive film with the pressure-sensitive adhesive layer shown in FIG. 4, but the transparent conductive film with the pressure-sensitive adhesive layer shown in FIG. 5.
  • a transparent conductive laminate in which the second transparent plastic film substrate 11 ′ is bonded can be obtained.
  • the second transparent plastic film substrate 11 ′ In general, a plastic film having a thickness of about 6 to 300 ⁇ m is used. When flexibility is not particularly required, a glass plate or a film-like or plate-like plastic having a thickness of about 0.05 to 10 mm is usually used. Examples of the plastic material include the same materials as the film base material 11. Even when a plurality of structures are adopted as the second transparent plastic film substrate 11 ', it is preferable to have the same thickness as described above.
  • a hard coat layer can be provided on one side or both sides of the second transparent plastic film substrate.
  • the hard coat layer 6 is provided on one surface (the surface not bonded to the adhesive layer 13) of the second transparent plastic film substrate 11 ′.
  • the hard coat layer is obtained by subjecting the second transparent plastic film substrate to a hard coat treatment.
  • the hard coat treatment can be performed by, for example, a method in which a hard resin such as an acrylic / urethane resin or a siloxane resin is applied and cured.
  • the surface is roughened by blending hard resin such as acrylic / urethane resin or siloxane resin with silicone resin to prevent reflection due to mirror action when used as a touch panel. It is also possible to form a non-glare surface that can be formed simultaneously.
  • the preferable thickness of the hard coat layer is about 0.1 to 30 ⁇ m.
  • a treatment layer or an antireflection layer may be provided.
  • the transparent conductive film or transparent conductive laminate with an adhesive layer of the present invention is used in the formation of various devices such as touch panels and liquid crystal displays.
  • it can be preferably used as an electrode plate for a touch panel.
  • the touch panel is suitably used for various detection methods (for example, a resistance film method, a capacitance method, etc.).
  • the resistive touch panel is composed of a touch-side touch panel electrode plate having a transparent conductive thin film and a display-side touch panel electrode plate having a transparent conductive thin film through a spacer so that the transparent conductive thin films face each other.
  • the electrode plate for a touch panel that is disposed so as to be opposed to the transparent conductive film of the present invention can be used for any touch panel electrode plate on the touch side or the display side.
  • the electrode plate for a touch panel using the transparent conductive film with a pressure-sensitive adhesive layer or the transparent conductive laminate of the present invention suppresses the occurrence of nutling, satisfies the durability and display characteristics, and reduces the thickness of the touch panel. From this point, it is preferable to use as an electrode plate for a touch panel on the display side.
  • a transparent conductive film having a transparent conductive thin film having a predetermined pattern shape is usually formed on the entire surface of the display unit. 4 to 7, the transparent conductive thin film 12 is not patterned, but an appropriately patterned one is used, and the patterned transparent conductive film is appropriately laminated and used.
  • the adhesive optical member of the present invention can be used as an optical film with an adhesive layer using an optical film for an image display device as the optical member 1 in FIG.
  • the optical film a film used for forming an image display device such as a liquid crystal display device or an organic EL display device is 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 can be used.
  • polarizers include dichroic iodine and dichroic dyes on hydrophilic polymer films such as polyvinyl alcohol films, partially formalized polyvinyl alcohol films, and ethylene / vinyl acetate copolymer partially saponified films.
  • hydrophilic polymer films such as polyvinyl alcohol films, partially formalized polyvinyl alcohol films, and ethylene / vinyl acetate copolymer partially saponified films.
  • examples thereof include polyene-based oriented films such as those obtained by adsorbing substances and uniaxially stretched, polyvinyl alcohol dehydrated products and polyvinyl chloride dehydrochlorinated products.
  • a polarizer composed of a polyvinyl alcohol film and a dichroic material such as 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 stretching it uniaxially can be prepared, for example, by immersing polyvinyl alcohol in an aqueous solution of iodine and stretching it 3 to 7 times the original length. If necessary, it can be immersed in an aqueous solution such as potassium iodide which may contain boric acid, zinc sulfate, zinc chloride or the like. Further, if necessary, the polyvinyl alcohol film may be immersed in water and washed before dyeing.
  • Stretching may be performed after dyeing with iodine, may be performed while dyeing, or may be dyed with iodine after stretching.
  • the film can be stretched even in an aqueous solution such as boric acid or potassium iodide or in a water bath.
  • thermoplastic resin excellent in transparency, mechanical strength, thermal stability, moisture barrier property, isotropy and the like is used.
  • thermoplastic resins include cellulose resins such as triacetyl cellulose, polyester resins, polyethersulfone resins, polysulfone resins, polycarbonate resins, polyamide resins, polyimide resins, polyolefin resins, (meth) acrylic resins, cyclic Examples thereof include polyolefin resins (norbornene resins), polyarylate resins, polystyrene resins, polyvinyl alcohol resins, and mixtures thereof.
  • a transparent protective film is bonded to one side of the polarizer by an adhesive layer.
  • thermosetting resin such as a system or an ultraviolet curable resin
  • a thermosetting resin such as a system or an ultraviolet curable resin
  • the additive include an ultraviolet absorber, an antioxidant, a lubricant, a plasticizer, a release agent, a coloring inhibitor, a flame retardant, a nucleating agent, an antistatic agent, a pigment, and a coloring agent.
  • the content of the thermoplastic resin in the transparent protective film is preferably 50 to 100% by weight, more preferably 50 to 99% by weight, still more preferably 60 to 98% by weight, and particularly preferably 70 to 97% by weight. .
  • content of the said thermoplastic resin in a transparent protective film is 50 weight% or less, there exists a possibility that the high transparency etc. which a thermoplastic resin originally has cannot fully be expressed.
  • optical film examples include liquid crystal display devices such as a reflection plate, an anti-transmission plate, a retardation plate (including wavelength plates such as 1/2 and 1/4), an optical compensation film, a visual compensation film, and a brightness enhancement film.
  • liquid crystal display devices such as a reflection plate, an anti-transmission plate, a retardation plate (including wavelength plates such as 1/2 and 1/4), an optical compensation film, a visual compensation film, and a brightness enhancement film.
  • lifted can be used alone as an optical film, or can be laminated on the polarizing plate for practical use and used as one layer or two or more layers.
  • 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.
  • an appropriate adhesive means such as an adhesive layer can be used for the lamination.
  • their optical axes can be set at an appropriate arrangement angle in accordance with the target phase difference characteristic.
  • the optical film with an adhesive layer 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 the conventional method. That is, a liquid crystal display device is generally formed by appropriately assembling components such as a liquid crystal cell, an optical film with an adhesive layer, and an illumination system as required, and incorporating a drive circuit. There is no limitation in particular except the point which uses the optical film with an adhesive layer by this invention, and it can apply according to the former.
  • As the liquid crystal cell an arbitrary type such as a TN type, STN type, ⁇ type, VA type, IPS type, or the like can be used.
  • Appropriate liquid crystal display devices such as a liquid crystal display device in which an optical film with an adhesive layer is disposed on one side or both sides of a liquid crystal cell, and a backlight or reflector used in an illumination system can be formed.
  • 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.
  • a liquid crystal display device for example, a single layer or a suitable part such as a diffusing plate, an antiglare layer, an antireflection film, a protective plate, a prism array, a lens array sheet, a light diffusing plate, a backlight, etc. Two or more layers can be arranged.
  • the storage elastic modulus was measured by ARES (viscoelastic spectrometer, manufactured by Rheometallic Scientific) using the pressure-sensitive adhesive layer prepared in each of the examples and comparative examples.
  • Deformation mode Torsion Measurement frequency: Constant frequency 1 Hz
  • Temperature increase rate 5 ° C / min
  • Measurement temperature Measured from near glass transition temperature (Tg) of acrylic polymer to 200 ° C
  • Shape Parallel plate 7.9mm ⁇
  • Sample thickness about 1.8mm (initial stage)
  • Example 1 (Preparation of acrylic polymer)
  • 100 parts by weight of butyl acrylate, 5 parts by weight of acrylic acid and 0.075 part by weight of 2-hydroxyethyl acrylate, 2 as a polymerization initiator , 2'-azobisisobutyronitrile 0.2 parts by weight and 200 parts by weight of ethyl acetate as a polymerization solvent were charged, and after sufficiently purging with nitrogen, the liquid temperature in the flask was kept at around 55 ° C while stirring under a nitrogen stream.
  • the acrylic polymer solution was prepared by carrying out the polymerization reaction for 10 hours.
  • the acrylic polymer had a weight average molecular weight of 2,200,000.
  • the acrylic pressure-sensitive adhesive solution is applied on a separator of a polyethylene terephthalate film (thickness: 38 ⁇ m) subjected to a release treatment, heated at 155 ° C. for 1 minute, and a thickness of 22 ⁇ m after drying. Formed.
  • the pressure-sensitive adhesive layer had a gel fraction of 92% by weight and a storage elastic modulus (G ′) at 23 ° C. of 118000 Pa.
  • undercoat layer As a film substrate, a film having a transition prevention layer (formed with urethane acrylic UV curable resin, 1 ⁇ m thick) on one surface of a 25 ⁇ m thick polyethylene terephthalate film (hereinafter referred to as PET film) is used. It was. A first undercoat layer having a thickness of 180 nm is formed on the other surface of the film substrate by a thermosetting resin having a weight ratio of 2: 2: 1 of melamine resin: alkyd resin: organosilane condensate. did.
  • SiO 2 was vacuum deposited on the first undercoat layer by an electron beam heating method at a vacuum degree of 1.33 ⁇ 10 ⁇ 2 to 2.67 ⁇ 10 ⁇ 2 Pa to a thickness of 40 nm.
  • a second undercoat layer (SiO 2 film) was formed.
  • the transparent conductive film (the surface on the side where the ITO film was not formed) was bonded to the pressure-sensitive adhesive layer provided on the release film to prepare a transparent conductive film with a pressure-sensitive adhesive layer.
  • the surface resistance value of the ITO film was 300 ⁇ / ⁇ .
  • the surface resistance value ( ⁇ / ⁇ ) of the ITO film was measured using a low-reester resistance measuring instrument manufactured by Mitsubishi Chemical Corporation.
  • Example 2 In Example 1, a transparent conductive film with a pressure-sensitive adhesive layer was prepared in the same manner as in Example 1 except that no isocyanate-based crosslinking agent was added in preparing the pressure-sensitive adhesive composition.
  • Example 1 a transparent conductive film with a pressure-sensitive adhesive layer was prepared in the same manner as in Example 1 except that no epoxy-based crosslinking agent was added in preparing the pressure-sensitive adhesive composition.
  • Example 2 a transparent conductive film with a pressure-sensitive adhesive layer was prepared in the same manner as in Example 1 except that the isocyanate-based crosslinking agent and the epoxy-based crosslinking agent were not added in preparing the pressure-sensitive adhesive composition. .
  • Example 1 preparation of the pressure-sensitive adhesive composition was carried out in the same manner as in Example 1 except that no epoxy-based crosslinking agent was added and that the amount of isocyanate-based crosslinking agent was changed to 0.6 parts by weight. Thus, a transparent conductive film with an adhesive layer was prepared.
  • Table 1 shows the content of the carboxyl group-containing monomer (acrylic acid) in the acrylic polymers used in Examples 1 and 2 and Comparative Examples 1 to 3, the type and amount of the crosslinking agent, and the prepared pressure-sensitive adhesive layer.
  • the gel fraction and the storage elastic modulus (G ′) at 23 ° C. are shown.
  • ⁇ Adhesion> The pressure-sensitive adhesive layer side of the transparent conductive film with a pressure-sensitive adhesive layer cut to a width of 25 mm on the treated surface of polyethylene terephthalate film (125 tetraite OES, thickness 125 ⁇ m, manufactured by Oike Kogyo Co., Ltd.) on which indium tin oxide has been vapor-deposited was pressed and reciprocated once with a 2kg roller, cured at 23 ° C for 20 minutes, and then the tensile strength of the adhesive strength (N / 25mm) when peeling the polyethylene terephthalate film with the adhesive layer in the direction of 180 ° at 300mm / min. Measured at Evaluation was performed according to the following criteria. ⁇ : 7.0 N / 25 mm or more ⁇ : 3.0 to less than 7.0 N / 25 mm
  • a transparent conductive laminate is laminated with a polyethylene terephthalate film (G1SPU, manufactured by Kimoto Co., Ltd.) having a hard coat layer on the adhesive layer of the transparent conductive film with an adhesive layer so that the hard coat layer is on the outside.
  • a body (same structure as in FIG. 7, but the undercoat layer is not shown in FIG. 7) was prepared.
  • the transparent conductive laminate was placed on a glass plate with a spacer (180 ⁇ m) so that the hard coat layer side was on the upper side.
  • a constant load 250 g ⁇ 30 minutes
  • ⁇ Pen traces cannot be confirmed.
  • X A pen trace can be confirmed.
  • Example 3 (Creation of polarizing plate) A polyvinyl alcohol film having a thickness of 80 ⁇ m was stretched 5 times in an iodine aqueous solution at 40 ° C. and then dried at 50 ° C. for 4 minutes to obtain a polarizer. A polarizing plate was obtained by laminating a 80 ⁇ m thick triacetyl cellulose film on both sides of this polarizer using a polyvinyl alcohol-based resin adhesive.
  • aqueous solution having a solid content concentration of 0.8% was prepared using a polyurethane resin and a water-soluble polythiophene-based conductive polymer, which are anchor layer forming materials (binders).
  • the aqueous solution was applied to one side of the polarizing plate so that the thickness after drying was 100 nm, and dried at 80 ° C. for 2 minutes to form an anchor layer.
  • Comparative Example 4 In the production of the polarizing plate with the pressure-sensitive adhesive layer of Example 3, the pressure-sensitive adhesive was obtained in the same manner as in Example 3 except that the pressure-sensitive adhesive layer provided on the release film was the same as that prepared in Comparative Example 3. A polarizing plate with a layer was prepared.
  • Comparative Example 5 In the production of the polarizing plate with the pressure-sensitive adhesive layer of Example 3, the pressure-sensitive adhesive was obtained in the same manner as in Example 3 except that the pressure-sensitive adhesive layer provided on the release film was the same as that prepared in Comparative Example 1. A polarizing plate with a layer was prepared.
  • Comparative Example 6 Formation of adhesive layer
  • An acrylic polymer was prepared in the same manner as in Example 1 except that 5 parts of acrylic acid was not used in the preparation of the acrylic polymer of Example 1.
  • a pressure-sensitive adhesive composition was prepared in the same manner as in Example 1 except that the acrylic polymer was used, and a pressure-sensitive adhesive layer was formed using the pressure-sensitive adhesive composition.
  • ⁇ Optical characteristics> The pressure-sensitive adhesive layer side of the polarizing plate with the pressure-sensitive adhesive layer was bonded onto a glass substrate to prepare a sample. This sample was left in an atmosphere of 60 ° C., 95% RH and 100 ° C. for 500 hours. ⁇ ab was measured by a high-speed spectrophotometer (DOT-3 type, manufactured by Murakami Color Research Laboratory Co., Ltd.) by the amount of hue change before and after being left (initial).
  • DOT-3 type manufactured by Murakami Color Research Laboratory Co., Ltd.
  • ⁇ Appearance> The pressure-sensitive adhesive layer side of the polarizing plate with the pressure-sensitive adhesive layer was bonded onto a glass substrate to prepare a sample (size: 32 cm ⁇ 24 cm). This sample was left in an atmosphere of 60 ° C., 95% RH and 100 ° C. for 500 hours. After the standing, foaming and peeling between the polarizing plate with the pressure-sensitive adhesive layer and the pressure-sensitive adhesive layer and between the glass and the pressure-sensitive adhesive layer in the sample were visually evaluated according to the following criteria. ⁇ : No foaming or peeling. X: Foaming and peeling can be confirmed.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Polymers & Plastics (AREA)
  • Medicinal Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Adhesive Tapes (AREA)
  • Laminated Bodies (AREA)
  • Liquid Crystal (AREA)
  • Position Input By Displaying (AREA)
  • Non-Insulated Conductors (AREA)

Abstract

L'invention porte sur une composition adhésive, pour des éléments optiques, qui contient un polymère (méth)acrylique contenant de 0,2 à 20 parties en poids d'un monomère à teneur en groupe carboxyle en tant qu'unité monomère, à savoir en tant que composant de copolymérisation, pour 100 parties en poids d'un (méth)acrylate d'alkyle ayant un groupe alkyle avec de 4 à 14 atomes de carbone. La composition adhésive pour des éléments optiques contient également, comme agents de réticulation, de 0,02 à 2 parties en poids d'un peroxyde et de 0,005 à 5 parties en poids d'un agent de réticulation époxy pour 100 parties du polymère (méth)acrylique. Le jaunissement de la composition adhésive pour des éléments optiques peut être supprimé à des températures élevées et dans des environnements à haute température et haute humidité. Par conséquent, la composition adhésive permet de former une couche adhésive pour laquelle le moussage, la séparation et autres sont supprimés à des températures élevées et dans des environnements à haute température et haute humidité.
PCT/JP2009/054545 2008-03-13 2009-03-10 Composition adhésive pour élément optique, couche adhésive pour élément optique, élément optique adhésif, stratifié conducteur transparent, écran tactile et dispositif d'affichage d'image WO2009113537A1 (fr)

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KR1020097021036A KR101242336B1 (ko) 2008-03-13 2009-03-10 광학 부재용 점착제 조성물, 광학 부재용 점착제층, 점착형 광학 부재, 투명 도전성 적층체, 터치 패널 및 화상 표시 장치
CN200980000287.5A CN101679819B (zh) 2008-03-13 2009-03-10 光学部件用粘合剂组合物、光学部件用粘合剂层、粘合型光学部件、透明导电性层叠体、触摸面板及图像显示装置

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