WO2017057357A1 - Film polarisant équipé de couche adhésive, son procédé de production, et dispositif d'affichage d'image - Google Patents

Film polarisant équipé de couche adhésive, son procédé de production, et dispositif d'affichage d'image Download PDF

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Publication number
WO2017057357A1
WO2017057357A1 PCT/JP2016/078445 JP2016078445W WO2017057357A1 WO 2017057357 A1 WO2017057357 A1 WO 2017057357A1 JP 2016078445 W JP2016078445 W JP 2016078445W WO 2017057357 A1 WO2017057357 A1 WO 2017057357A1
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WIPO (PCT)
Prior art keywords
adhesive layer
pressure
sensitive adhesive
polarizing film
group
Prior art date
Application number
PCT/JP2016/078445
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English (en)
Japanese (ja)
Inventor
有 森本
雄祐 外山
Original Assignee
日東電工株式会社
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Filing date
Publication date
Priority claimed from JP2016186801A external-priority patent/JP6154054B2/ja
Application filed by 日東電工株式会社 filed Critical 日東電工株式会社
Priority to KR1020177009972A priority Critical patent/KR101934940B1/ko
Priority to CN201680003216.0A priority patent/CN107076918B/zh
Priority to KR1020187037864A priority patent/KR102157234B1/ko
Publication of WO2017057357A1 publication Critical patent/WO2017057357A1/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
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D129/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Coating compositions based on hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Coating compositions based on derivatives of such polymers
    • C09D129/02—Homopolymers or copolymers of unsaturated alcohols
    • C09D129/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D201/00—Coating compositions based on unspecified macromolecular compounds
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02—Non-macromolecular additives
    • C09J11/06—Non-macromolecular additives organic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J201/00—Adhesives based on unspecified macromolecular compounds
    • C09J201/02—Adhesives based on unspecified macromolecular compounds characterised by the presence of specified groups, e.g. terminal or pendant functional groups
    • C09J201/06—Adhesives based on unspecified macromolecular compounds characterised by the presence of specified groups, e.g. terminal or pendant functional groups containing oxygen atoms
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements

Definitions

  • the present invention relates to a polarizing film with a pressure-sensitive adhesive layer and a method for producing the same.
  • the pressure-sensitive adhesive layer-attached polarizing film can form an image display device such as a liquid crystal display device (LCD) or an organic EL display device alone or as an optical film obtained by laminating the polarizing film.
  • LCD liquid crystal display device
  • organic EL display device alone or as an optical film obtained by laminating the polarizing film.
  • polarizing films In liquid crystal display devices and the like, it is indispensable to dispose polarizing elements on both sides of the liquid crystal cell because of its image forming method, and generally a polarizing film is attached.
  • an adhesive When sticking the said polarizing film to a liquid crystal cell, an adhesive is normally used.
  • attachment of a polarizing film and a liquid crystal cell reduces the loss of light normally, each material is closely_contact
  • the adhesive since the adhesive has the merit that a drying step is not required to fix the polarizing film, the adhesive is a polarizing film with an adhesive layer provided in advance as an adhesive layer on one side of the polarizing film.
  • a film is generally used.
  • a release film is usually attached to the pressure-sensitive adhesive layer of the polarizing film with a pressure-sensitive adhesive layer.
  • a pressure-sensitive adhesive containing a base polymer and a crosslinking agent is usually used.
  • a base polymer an acrylic polymer is awarded
  • an isocyanate-based crosslinking agent is awarded.
  • a polarizing film with an adhesive layer using a single protective polarizing film in which a protective film is provided only on one side of a polarizer has been proposed.
  • the polarizing film with the pressure-sensitive adhesive layer using the single-protective polarizing film has a shrinkage stress of the polarizer on the side provided with the protective film under a severe environment such as thermal shock (for example, a test at 95 ° C. for 250 hours). Due to the difference in shrinkage stress of the polarizer opposite to the protective film, excessive stress is generated inside the polarizer so that it penetrates the entire surface from a minute crack of several hundred ⁇ m in the direction of the absorption axis of the polarizer. There is a problem that various cracks are easily generated up to a through crack. That is, the piece protective polarizing film with an adhesive layer was not sufficiently durable in the harsh environment.
  • Patent Document 1 Providing a protective layer made of a water-soluble film-forming composition (polyvinyl alcohol-based resin composition) on at least one surface of the polarizer from the viewpoint of reducing the thickness and weight while suppressing the occurrence of the through cracks. It has been proposed (Patent Document 1).
  • a protective layer (anchor coat layer) formed from a polyvinyl alcohol-based resin composition
  • a pressure-sensitive adhesive layer containing an isocyanate-based crosslinking agent is further provided in the protective layer
  • the protective layer and the pressure-sensitive adhesive layer have a good anchoring force due to the reaction between the hydroxyl group derived from the polyvinyl alcohol-based resin in the layer and the isocyanate group derived from the isocyanate-based crosslinking agent in the pressure-sensitive adhesive layer.
  • the pressure-sensitive adhesive layer containing an isocyanate-based crosslinking agent has a hardness corresponding to dent resistance and processability, and after securing the anchoring force, after forming the pressure-sensitive adhesive layer, A predetermined aging time was required until shipment. Moreover, since the self-crosslinking reaction advances, the adhesive composition containing an isocyanate-based crosslinking agent has a pot life as an adhesive composition and is difficult to handle. On the other hand, in the pressure-sensitive adhesive composition containing no isocyanate-based crosslinking agent, the anchoring property with the anchor coat layer formed from the polyvinyl alcohol-based resin composition is not sufficiently satisfactory.
  • the present invention is a polarizing film with a pressure-sensitive adhesive layer having a polarizer, an anchor coat layer containing a water-based resin, and a pressure-sensitive adhesive layer in this order, even if the pressure-sensitive adhesive layer does not contain an isocyanate-based crosslinking agent.
  • An object of the present invention is to provide a polarizing film with an adhesive layer in which the anchoring force between the anchor coat layer and the adhesive layer is good.
  • an object of this invention is to provide the manufacturing method of the said polarizing film with an adhesive layer.
  • this invention relates to the image display apparatus which has the said polarizing film with an adhesive layer.
  • the present invention is a polarizing film with a pressure-sensitive adhesive layer having a polarizer, an anchor coat layer and a pressure-sensitive adhesive layer in this order
  • the anchor coat layer is formed from an aqueous resin composition containing an aqueous resin and a compound (a) having at least one primary alcohol capable of reacting with a hydroxyl group at a molecular end
  • the pressure-sensitive adhesive layer is formed of a pressure-sensitive adhesive composition containing a hydroxyl group-containing base polymer and a mercapto group-containing silane coupling agent, and relates to a polarizing film with a pressure-sensitive adhesive layer.
  • the water-based resin at least one selected from a polyvinyl alcohol-based resin, a polyurethane-based resin, and an oxazoline group-containing polymer can be used.
  • a polyvinyl alcohol-based resin is preferable.
  • the polyvinyl alcohol-based resin preferably has a saponification degree of 96 mol% or more and an average polymerization degree of 2000 or more.
  • the aqueous resin composition preferably contains 0.2 to 20 parts by weight of the compound (a) with respect to 100 parts by weight of the aqueous resin.
  • methylol melamine in the polarizing film with an adhesive layer, methylol melamine can be preferably used as the compound (a).
  • the anchor coat layer preferably has a thickness of 0.05 ⁇ m or more and 6 ⁇ m or less.
  • a (meth) acrylic polymer having a hydroxyl group can be used as the base polymer having a hydroxyl group.
  • the pressure-sensitive adhesive composition preferably contains 0.01 to 5 parts by weight of the mercapto group-containing silane coupling agent with respect to 100 parts by weight of the base polymer having a hydroxyl group. .
  • the pressure-sensitive adhesive composition may contain a crosslinking agent.
  • the crosslinking agent preferably contains a crosslinking agent (b) that does not react with hydroxyl groups.
  • the crosslinking agent (b) that does not react with the hydroxyl group is preferably a peroxide.
  • the pressure-sensitive adhesive composition contains 0.01 to 2 parts by weight of a crosslinking agent (b) that does not react with the hydroxyl group with respect to 100 parts by weight of the base polymer having a hydroxyl group. It is preferable.
  • the polarizer preferably has a thickness of 15 ⁇ m or less.
  • the polarizer has optical properties represented by the following formula: P> ⁇ (10 0.929T-42.4 ⁇ 1) ⁇ 100 (where T ⁇ 42.3), and It is preferably configured to satisfy the condition of P ⁇ 99.9 (however, T ⁇ 42.3).
  • the polarizing film with an adhesive layer may have a protective film on at least one side of the polarizer.
  • a separator can be laminated on the pressure-sensitive adhesive layer.
  • the present invention is also a method for producing the polarizing film with the pressure-sensitive adhesive layer, On the polarizer, an aqueous resin composition containing a water-based resin and a compound (a) having at least one primary alcohol capable of reacting with a hydroxyl group at the molecular end is coated, then dried, and anchored. Forming a coat layer; Forming a pressure-sensitive adhesive layer on the anchor coat layer from a pressure-sensitive adhesive composition containing a base polymer having a hydroxyl group and a mercapto group-containing silane coupling agent; The manufacturing method of the polarizing film with an adhesive layer characterized by having.
  • the present invention also relates to an image display device having the polarizing film with the pressure-sensitive adhesive layer.
  • the polarizing film with an adhesive layer of the present invention has a polarizer, an anchor coat layer containing an aqueous resin, and an adhesive layer in this order.
  • the anchor coat layer contains a compound (a) having at least one primary alcohol capable of reacting with a hydroxyl group at the molecular end, for example, methylol melamine, and the pressure-sensitive adhesive layer contains a mercapto group-containing silane coupling. Contains agents.
  • the terminal primary alcohol such as methylol melamine in the anchor coat layer reacts with an aqueous resin (for example, polyvinyl alcohol resin) of the anchor coat layer, while the mercapto group-containing silane cup in the pressure-sensitive adhesive layer.
  • the terminal primary alcohol such as methylol melamine in the anchor coat layer is derived from the polyvinyl alcohol resin in the polarizer. It is thought to react with hydroxyl groups. Moreover, it is thought that the silanol group of a mercapto group containing silane coupling agent reacts with the hydroxyl group derived from the base polymer in an adhesive layer.
  • the mercapto group-containing silane coupling agent can enhance the crosslinking of the pressure-sensitive adhesive layer by forming a sulfide bond by self-condensation by reaction between mercapto groups (—SH, thiol groups) in the pressure-sensitive adhesive layer.
  • the anchor coat layer and each material in the pressure-sensitive adhesive layer are combined by reacting, so that the anchor coat layer and the pressure-sensitive adhesive layer do not contain an isocyanate-based crosslinking agent.
  • the pressure-sensitive adhesive layer is considered to have good anchoring properties.
  • the polarizing films 10, 11, and 12 with the pressure-sensitive adhesive layer of the present invention will be described with reference to FIGS. 1 to 3.
  • the polarizing films 10, 11, 12 with an adhesive layer have a polarizer 1, an anchor coat layer 2 containing an aqueous resin, and an adhesive layer 3 in this order.
  • the polarizer 1 is directly provided with the anchor coat layer 2 formed from an aqueous resin composition containing an aqueous resin. be able to.
  • protective films 5 and 5 ′ can be provided on one side or both sides of the polarizer 1.
  • FIG. 1 In FIG.
  • the polarizing film 10 with an adhesive layer in the polarizing film 10 with an adhesive layer, the case where it has the protective film 5 on the opposite side to the side which provides the anchor coat layer 2 of the polarizer 1 is illustrated.
  • FIG. 3 when the polarizing film 10 with an adhesive layer has the protective films 5 and 5 'on both sides of the polarizer 1, and the anchor coat layer 2 is provided on the protective film 5' side. Is illustrated.
  • the polarizer 1 and the protective film 5 are laminated via intervening layers such as an adhesive layer, a pressure-sensitive adhesive layer, and an undercoat layer (primer layer).
  • the easy-adhesion layer and the adhesive layer can be laminated by providing an easy-adhesion layer or applying an activation treatment to the protective films 5 and 5 '.
  • the polarizing films 10 and 11 with an adhesive layer of this invention can provide the separator 4 in the adhesive layer 3, as shown in FIG.
  • the polarizing film 11 with an adhesive layer has the protective film 5 like FIG. 2, FIG. 3, a surface protective film can be provided in the protective film 5.
  • 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 2 to 25 ⁇ m.
  • a polarizer obtained by dyeing a polyvinyl alcohol film with iodine and uniaxially stretching it can be prepared, for example, by dyeing a polyvinyl alcohol film in an aqueous solution of iodine and stretching it 3 to 7 times the original length. it can. 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.
  • a thin polarizer having a thickness of 15 ⁇ m or less can be used.
  • the thickness of the polarizer is preferably 12 ⁇ m from the viewpoint of thinning and crack resistance due to thermal shock, more preferably 10 ⁇ m or less, further 8 ⁇ m or less, further 7 ⁇ m or less, and further 6 ⁇ m or less.
  • the thickness of the polarizer is preferably 2 ⁇ m or more, and more preferably 3 ⁇ m or more.
  • Such a thin polarizer has less thickness unevenness, excellent visibility, and less dimensional change, and therefore excellent durability against thermal shock.
  • a thin polarizer having a thickness of 15 ⁇ m or less typically, Japanese Patent No. 4751486, Japanese Patent No. 4751481, Japanese Patent No. 4815544, Japanese Patent No. 5048120, Japanese Patent No. 5857517
  • a thin polarizing film (polarizer) described in International Publication No. 2014/077599 pamphlet, International Publication No. 2014/077636 pamphlet, etc., or a thin polarizing film (polarizer) obtained from the production method described therein Can be mentioned.
  • the polarizer has an optical characteristic expressed by a single transmittance T and a degree of polarization P of the following formula: P> ⁇ (10 0.929T-42.4 ⁇ 1) ⁇ 100 (where T ⁇ 42.3) and It is preferably configured to satisfy the condition of P ⁇ 99.9 (however, T ⁇ 42.3).
  • a polarizing film configured so as to satisfy the above-described conditions uniquely has performance required as a display for a liquid crystal television using a large display element. Specifically, the contrast ratio is 1000: 1 or more and the maximum luminance is 500 cd / m 2 or more. As other uses, for example, it is bonded to the viewing side of the organic EL display device.
  • Patent No. 4751486, Patent in that the polarizing performance can be improved at a high magnification.
  • stretching in a boric-acid aqueous solution as described in the 4751481 specification and the patent 4815544 specification is preferable, and it describes especially in the patent 4751481 specification and the patent 4815544 specification.
  • stretching in the boric-acid aqueous solution which has this is preferable.
  • These thin polarizing films can be obtained by a production method including a step of stretching a polyvinyl alcohol-based resin (hereinafter also referred to as PVA-based resin) layer and a stretching resin base material in a laminated state and a step of dyeing.
  • PVA-based resin polyvinyl alcohol-based resin
  • a stretching resin base material in a laminated state
  • dyeing a step of dyeing
  • 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
  • cellulose polymers such as diacetyl cellulose and triacetyl cellulose
  • acrylic polymers such as polymethyl methacrylate
  • styrene such as polystyrene and acrylonitrile / styrene copolymer (AS resin)
  • AS resin acrylonitrile / styrene copolymer
  • polyethylene, polypropylene, polyolefins having a cyclo or norbornene structure, polyolefin polymers such as ethylene / propylene copolymers, vinyl chloride polymers, amide polymers such as nylon and aromatic polyamide, imide polymers, sulfone polymers , Polyether sulfone polymer, polyether ether ketone polymer, polyphenylene sulfide polymer, vinyl alcohol polymer, vinylidene chloride polymer, vinyl butyral polymer, arylate polymer, polyoxymethylene polymer, epoxy polymer, or the above Polymer blends and the like can also be mentioned as examples of the polymer forming the protective film.
  • These protective films are usually bonded to the polarizer by an adhesive layer.
  • the protective film is applied to a polarizer using a (meth) acrylic, urethane-based, acrylurethane-based, epoxy-based, or silicone-based thermosetting resin or ultraviolet curable resin, and cured. Can be formed.
  • a retardation film can be used as the protective film.
  • the retardation film include those having a front retardation of 40 nm or more and / or a retardation having a thickness direction retardation of 80 nm or more.
  • the front phase difference is usually controlled in the range of 40 to 200 nm
  • the thickness direction phase difference is usually controlled in the range of 80 to 300 nm.
  • the retardation film functions also as a polarizer protective film, so that the thickness can be reduced.
  • the retardation film examples include a birefringent film obtained by uniaxially or biaxially stretching a thermoplastic resin film.
  • the stretching temperature, stretching ratio, and the like are appropriately set depending on the retardation value, film material, and thickness.
  • the thickness of the protective film can be determined as appropriate, but in general, it is preferably 3 to 200 ⁇ m, more preferably 3 to 100 ⁇ m from the viewpoints of workability such as strength and handleability, and thin layer properties. Is preferred.
  • the thickness of the protective film (when a film is formed in advance) is preferably 10 to 60 ⁇ m, more preferably 10 to 45 ⁇ m from the viewpoint of transportability.
  • the thickness of the protective film (when formed by coating and curing) is preferably 3 to 25 ⁇ m, more preferably 3 to 20 ⁇ m from the viewpoint of transportability.
  • the protective film may be used in a plurality of layers or in a plurality of layers.
  • a functional layer such as a hard coat layer, an antireflection layer, an antisticking layer, a diffusion layer or an antiglare layer can be provided on the surface of the protective film where the polarizer is not adhered.
  • the hard coat layer, the antireflection layer, the antisticking layer, the diffusion layer, the antiglare layer, and other functional layers can be provided on the protective film itself, or can be provided separately from the protective film. it can.
  • the protective film and the polarizer are laminated via an intervening layer such as an adhesive layer, an adhesive layer, and an undercoat layer (primer layer). At this time, it is desirable that the both are laminated without an air gap by an intervening layer.
  • an intervening layer such as an adhesive layer, an adhesive layer, and an undercoat layer (primer layer).
  • the adhesive layer is formed with an adhesive.
  • the type of the adhesive is not particularly limited, and various types can be used.
  • the adhesive layer is not particularly limited as long as it is optically transparent. Examples of the adhesive include water-based, solvent-based, hot-melt-based, active energy ray-curable types, and the like. Or an active energy ray hardening-type adhesive agent is suitable.
  • water-based adhesives examples include isocyanate-based adhesives, polyvinyl alcohol-based adhesives, gelatin-based adhesives, vinyl-based latex systems, and water-based polyesters.
  • the water-based adhesive is usually used as an adhesive composed of an aqueous solution, and usually contains 0.5 to 60% by weight of solid content.
  • the active energy ray curable adhesive is an adhesive that cures by an active energy ray such as an electron beam or ultraviolet rays (radical curable type, cationic curable type), for example, in an electron beam curable type or an ultraviolet curable type. Can be used.
  • an active energy ray such as an electron beam or ultraviolet rays (radical curable type, cationic curable type), for example, in an electron beam curable type or an ultraviolet curable type.
  • an active energy ray curable adhesive for example, a photo radical curable adhesive can be used.
  • the photo radical curable active energy ray curable adhesive is used as an ultraviolet curable adhesive, the adhesive contains a radical polymerizable compound and a photo polymerization initiator.
  • the adhesive is preferably applied so that the finally formed adhesive layer has a thickness of 30 to 300 nm.
  • the thickness of the adhesive layer is more preferably 60 to 250 nm.
  • the thickness of the adhesive layer is preferably 0.1 to 200 ⁇ m. More preferably, it is 0.5 to 50 ⁇ m, and still more preferably 0.5 to 10 ⁇ m.
  • an easily bonding layer can be provided between a protective film and an adhesive bond layer.
  • the anchor coat layer contains a water-based resin.
  • the anchor coat layer can be formed, for example, by applying an aqueous resin composition containing an aqueous resin to a polarizer.
  • the aqueous resin for example, at least one selected from polyvinyl alcohol resins, polyurethane resins, and oxazoline group-containing polymers can be used.
  • a polyvinyl alcohol resin is preferable as the aqueous resin from the viewpoint of suppressing the occurrence of through cracks.
  • the water-based resin is preferably a polyurethane resin or an oxazoline group-containing polymer from the viewpoint of coating film formation and wettability with respect to the protective film. .
  • polyvinyl alcohol resin examples include polyvinyl alcohol.
  • Polyvinyl alcohol is obtained by saponifying polyvinyl acetate.
  • polyvinyl alcohol-based resin examples include a saponified product of a copolymer of vinyl acetate and a monomer having copolymerizability.
  • the copolymerizable monomer is ethylene
  • an ethylene-vinyl alcohol copolymer is obtained.
  • the copolymerizable monomer include unsaturated carboxylic acids such as (anhydrous) maleic acid, fumaric acid, crotonic acid, itaconic acid, (meth) acrylic acid, and esters thereof; ethylene, propylene, and the like.
  • ⁇ -olefin (meth) allylsulfonic acid (soda), sulfonic acid soda (monoalkylmalate), disulfonic acid soda alkylmalate, N-methylolacrylamide, acrylamide alkylsulfonic acid alkali salt, N-vinylpyrrolidone, N- Examples include vinyl pyrrolidone derivatives.
  • These polyvinyl alcohol resins can be used alone or in combination of two or more.
  • Polyvinyl alcohol obtained by saponifying polyvinyl acetate is preferable from the viewpoint of satisfying moisture heat resistance and water resistance by controlling the heat of crystal fusion of the anchor coat layer to 30 mj / mg or more.
  • the saponification degree of the polyvinyl alcohol-based resin can be, for example, 95 mol% or more. From the viewpoint of satisfying the heat and moisture resistance and water resistance, the saponification degree is preferably 96 mol% or more, 99 Mole% or more is preferable, and 99.5 mol% or more is more preferable.
  • the degree of saponification represents the proportion of units that are actually saponified to vinyl alcohol units among the units that can be converted to vinyl alcohol units by saponification, and the residue is a vinyl ester unit.
  • the saponification degree can be determined according to JIS K 6726-1994.
  • the average degree of polymerization of the polyvinyl alcohol-based resin can be, for example, 500 or more. From the viewpoint of satisfying the heat resistance and water resistance of the anchor coat layer, the average degree of polymerization is preferably 1000 or more. Further, 1500 or more is preferable, and 2000 or more is more preferable. The average degree of polymerization of the polyvinyl alcohol resin is measured according to JIS-K6726.
  • a modified polyvinyl alcohol resin having a hydrophilic functional group in the side chain of the polyvinyl alcohol or a copolymer thereof can be used.
  • the hydrophilic functional group include an acetoacetyl group and a carbonyl group.
  • modified polyvinyl alcohol obtained by acetalization, urethanization, etherification, grafting, phosphoric esterification or the like of a polyvinyl alcohol resin can be used.
  • polyurethane resin an emulsion of polyurethane resin can be used.
  • polyurethane resin emulsion a self-emulsified one without using an emulsifier can be used.
  • the polyurethane-based resin for example, a one-component type obtained by a polyaddition reaction of a polymer polyol and an isocyanate compound can be used.
  • a one-component polyurethane resin for example, a polyether polyurethane resin, a polyester polyurethane resin, or the like can be used.
  • the polyurethane resin those in which hydroxyl groups remain are preferable.
  • a lacquer type polyurethane resin can be used.
  • the polyurethane resin can form a film by simply removing the solvent and water by drying.
  • the polyether-based polyurethane resin is generally obtained by a polyaddition reaction of a polyether polyol and an isocyanate compound.
  • the polyether polyol is obtained by adding alkylene oxide to one or more polyhydric alcohols by ring-opening polymerization.
  • a polyester polyurethane resin is generally obtained by a polyaddition reaction of a polyester polyol and an isocyanate compound.
  • the polyesterol polyol is obtained by polycondensation of a polyhydric alcohol and a polybasic acid.
  • the polymer polyol such as polyether polyol or polyether polyol has a number average molecular weight of preferably 400 to 3000, and more preferably 500 to 2000.
  • Polymer polyols such as polyether polyols and polyester polyols may be used singly or may be a copolymer using two or more.
  • isocyanate compound aromatic, araliphatic, aliphatic, or alicyclic isocyanates usually used in polyurethane can be used as appropriate.
  • isocyanate compound adducts, dimers, trimers, and polymers of the above isocyanate compounds may be used.
  • isocyanate compound a modified isocyanate obtained by urethanizing, uretidione-forming, or carbodiimidizing a part of the above-mentioned isocyanate can also be used.
  • the polyurethane resin is dispersed in water
  • a method is known in which the resin is forcibly emulsified and dispersed using an emulsifier.
  • a self-emulsified product obtained by introducing an anionic group, a cationic group or a nonionic group of a water-dispersible hydrophilic group into the resin can be used.
  • an ionic polymer complex can be used.
  • polyurethane resin emulsions examples include Adekabon titer HUX series manufactured by Asahi Denka Kogyo Co., Ltd., which is self-emulsified without using an emulsifier.
  • water-based urethane resin examples include Superflex series manufactured by Daiichi Kogyo Seiyaku Co., Ltd., Takelac W-6020 manufactured by Mitsui Chemicals Polyurethanes, and the like.
  • An epoxy resin emulsion can be used as the epoxy resin.
  • a method is known in which the resin is forcibly emulsified and dispersed using an emulsifier.
  • the epoxy resin include Adeka Resin EM series manufactured by ADEKA Corporation, Celoxide 2021P manufactured by Daicel Corporation, and the like.
  • Examples of the oxazoline group-containing polymer include polymers having a main chain composed of an acrylic skeleton or a styrene skeleton, and having an oxazoline group in the side chain of the main chain.
  • an oxazoline group-containing acrylic polymer having a main chain composed of an acrylic skeleton and having an oxazoline group in the side chain of the main chain is preferable.
  • Examples of the oxazoline group include a 2-oxazoline group, a 3-oxazoline group, and a 4-oxazoline group, and among these, a 2-oxazoline group is preferable.
  • the 2-oxazoline group is generally represented by the following general formula (1).
  • R 1 to R 4 each independently represents a hydrogen atom, a halogen atom, an alkyl group, an aralkyl group, a phenyl group, or a substituted phenyl group.
  • the oxazoline group-containing polymer may have a polyoxyalkylene group in addition to the oxazoline group.
  • the number average molecular weight of the oxazoline group-containing polymer is preferably 5,000 or more, more preferably 10,000 or more, and usually 1,000,000 or less. If the number average molecular weight is lower than 5,000, the anchor layer may have insufficient strength, causing cohesive failure, and the anchoring force may not be improved. When the number average molecular weight is higher than 1,000,000, workability may be inferior.
  • the oxazoline group-containing polymer has an oxazoline value of, for example, 1,500 g solid / eq. Or less, preferably 1,200 g solid / eq. The following is more preferable. The oxazoline value is 1,500 g solid / eq. If it is larger, the amount of the oxazoline group contained in the molecule decreases, and the anchoring force may not be improved.
  • the functional group in the pressure-sensitive adhesive layer can be obtained by including the oxazoline group-containing polymer in the anchor coat layer. It can react with and adhere tightly.
  • oxazoline group-containing polymer examples include oxazoline group-containing acrylic polymers such as Epochros WS-300, Epocros WS-500, and Epocros WS-700 manufactured by Nippon Shokubai Co., Ltd.
  • oxazoline group-containing acrylic / styrene-based polymers such as Epocros K-1000 series and Epocros K-2000 series, which can be used alone or in combination of two or more.
  • the anchor coat layer of the present invention is formed from a water-based resin composition containing the water-based resin as a main component.
  • the water-based resin composition has a primary alcohol capable of reacting with a hydroxyl group at the molecular end. It contains at least one compound (a). Reaction of the mercapto group-containing silane coupling agent and the hydroxyl group-containing base polymer in the pressure-sensitive adhesive composition forming the pressure-sensitive adhesive layer as described above by introducing the compound (a) into the anchor coat layer Advances and the anchoring force between the anchor coat layer and the pressure-sensitive adhesive layer can be improved.
  • the aqueous resin preferably does not have a functional group having reactivity with the primary alcohol capable of reacting with the hydroxyl group of the compound (a), and among the exemplified aqueous resins, the polyvinyl alcohol resin
  • unmodified polyvinyl alcohol resin is preferably used.
  • the hydrophilic functional group related to the modification is an adhesive in relation to a primary alcohol that can react with the hydroxyl group of the compound (a).
  • Those having lower reactivity than the functional group (silanol group) of the mercapto group-containing silane coupling agent in the agent composition are preferred.
  • the compound (a) is preferably blended at a ratio of, for example, 0.2 parts by weight or more and 20 parts by weight or less with respect to 100 parts by weight of the aqueous resin.
  • the ratio of the compound (a) is preferably 0.2 parts by weight or more for improving the anchoring force.
  • the proportion of the compound (a) is preferably 1 part by weight or more, and more preferably 3 parts by weight or more.
  • the proportion of the compound (a) is 20 parts by weight or less. It is preferably 10 parts by weight or less, more preferably 7 parts by weight or less.
  • the ratio of the compound (a) is determined by the type of the hydroxyl group-containing base polymer and mercapto group-containing silane coupling agent used in the pressure-sensitive adhesive composition.
  • the ratio of the aqueous resin in the anchor coat layer or the aqueous resin composition is preferably 80% by weight or more, more preferably 90% by weight or more, and further preferably 95% by weight or more.
  • a compound having at least one primary alcohol at the molecular end can be suitably used.
  • the compound include methylol urea, methylol melamine, amino-formaldehyde resins such as condensates of alkylated methylol urea and formaldehyde, ethylene glycol, glycerin, 1,6-hexanediol, 1,8-octanediol, fat Group alcohol and polyethylene glycol.
  • amino-formaldehyde resins having a methylol group, and methylol melamine are particularly preferred.
  • compounds having a functional group capable of reacting with a hydroxyl group other than the compound (a) can be used.
  • a compound having an amino group at the molecular end can be mentioned.
  • the compound include alkylene diamines having two alkylene groups and two amino groups such as ethylene diamine, triethylene diamine, and hexamethylene diamine; hydrazine; adipic acid dihydrazide, oxalic acid dihydrazide, malonic acid dihydrazide, succinic acid dihydrazide, and glutaric acid.
  • Dicarboxylic acid dihydrazides such as dihydrazide, isophthalic acid dihydrazide, sebacic acid dihydrazide, maleic acid dihydrazide, fumaric acid dihydrazide, itaconic acid dihydrazide; ethylene-1,2-dihydrazine, propylene-1,3-dihydrazine, butylene-1,4 -Water-soluble dihydrazine such as dihydrazine.
  • hydrazine is preferred.
  • the base polymer of the pressure-sensitive adhesive composition has a hydroxyl group (when the base polymer is a (meth) acrylic polymer, the monomer unit contains a hydroxyl group-containing monomer as a monomer unit). It is suitable for
  • the compound having a functional group capable of reacting with a hydroxyl group other than the compound (a) for example, tolylene diisocyanate, hydrogenated tolylene diisocyanate, trimethylolpropane tolylene diisocyanate adduct, triphenylmethane triisocyanate, Methylene bis (4-phenylmethane triisocyanate, isophorone diisocyanate and isocyanates such as ketoxime block product or phenol block product thereof; ethylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether, glycerin di or triglycidyl ether, 1,6- Hexanediol diglycidyl ether, trimethylolpropane triglycidyl ether, diglycidyl aniline, diglycidyl a Epoxys such as ethanol; monoaldehydes such as formaldehyde, acetaldehyde, propionaldeh
  • the compound having a functional group capable of reacting with a hydroxyl group other than the compound (a) can be used from the viewpoint of improving water resistance and controlling the elastic modulus, and the ratio is based on 100 parts by weight of the aqueous resin. 20 parts by weight or less, preferably 10 parts by weight or less, and more preferably 5 parts by weight or less.
  • the aqueous resin composition is prepared as a solution in which the aqueous resin is dissolved in a solvent.
  • the solvent include water, dimethyl sulfoxide, dimethylformamide, dimethylacetamide N-methylpyrrolidone. These may be used alone or in combination of two or more. Among these, it is preferable to use it as an aqueous solution using water as a solvent.
  • the concentration of the water-based resin in the water-based resin composition (for example, an aqueous solution) is not particularly limited, but is 0.1 to 15% by weight, preferably 0.5%, in consideration of coating property and storage stability. ⁇ 10% by weight.
  • aqueous resin composition for example, aqueous solution
  • surfactant etc.
  • examples of the surfactant include nonionic surfactants.
  • stabilizers such as various tackifiers, ultraviolet absorbers, antioxidants, heat stabilizers and hydrolysis stabilizers can be blended.
  • the thickness of the anchor coat layer is preferably 0.05 ⁇ m, more preferably 0.2 ⁇ m or more, and the thickness of the anchor coat layer is preferably 0.5 ⁇ m or more. It is preferably 7 ⁇ m or more.
  • the anchor coat layer preferably has a thickness of 0.2 ⁇ m or more, and the anchor coat layer having the thickness generates cracks due to thermal shock. Can be suppressed.
  • the thickness of the anchor coat layer is preferably 6 ⁇ m or less, more preferably 5 ⁇ m or less, further 3 ⁇ m or less, and further 2 ⁇ m or less. Is preferred.
  • the anchor coat layer can be formed by applying and drying the aqueous resin composition on the other surface of the polarizer (the surface not having the protective film).
  • the aqueous resin composition is applied so as to have a thickness after drying (preferably 0.2 ⁇ m to 6 ⁇ m).
  • the application operation is not particularly limited, and any appropriate method can be adopted.
  • various means such as a roll coating method, a spin coating method, a wire bar coating method, a dip coating method, a die coating method, a curtain coating method, a spray coating method, a knife coating method (comma coating method, etc.) can be employed.
  • the pressure-sensitive adhesive layer is formed from a pressure-sensitive adhesive composition containing a base polymer having a hydroxyl group and a mercapto group-containing silane coupling agent.
  • a pressure-sensitive adhesive composition containing a base polymer having a hydroxyl group and a mercapto group-containing silane coupling agent.
  • Adhesives include rubber adhesives, acrylic adhesives, silicone adhesives, urethane adhesives, vinyl alkyl ether adhesives, polyvinyl alcohol adhesives, polyvinyl pyrrolidone adhesives, polyacrylamide adhesives, Cellulose-based adhesives and the like can be mentioned.
  • Various base polymers can be used according to these pressure-sensitive adhesives.
  • the ratio of the base polymer having a hydroxyl group in the pressure-sensitive adhesive layer or pressure-sensitive adhesive composition is preferably 80% by weight or more, more preferably 90% by weight or more, and further 95% by weight. The above is preferable.
  • a (meth) acrylic polymer is used as the base polymer of the acrylic pressure-sensitive adhesive.
  • the (meth) acrylic polymer usually contains an alkyl (meth) acrylate as a main component as a monomer unit.
  • (Meth) acrylate refers to acrylate and / or methacrylate, and (meth) of the present invention has the same meaning.
  • alkyl (meth) acrylate constituting the main skeleton of the (meth) acrylic polymer examples include linear or branched alkyl groups having 1 to 18 carbon atoms.
  • the alkyl group includes methyl group, ethyl group, propyl group, isopropyl group, butyl group, isobutyl group, amyl group, hexyl group, cyclohexyl group, heptyl group, 2-ethylhexyl group, isooctyl group, nonyl group, decyl group.
  • alkyl groups preferably have an average carbon number of 3 to 9.
  • the (meth) acrylic polymer used in the present invention preferably contains a hydroxyl group-containing monomer as a monomer unit.
  • the hydroxyl group-containing monomer has a polymerizable functional group having an unsaturated double bond such as a (meth) acryloyl group or a vinyl group, and has a hydroxyl group.
  • Specific examples of the hydroxyl group-containing monomer include, for example, 2-hydroxyethyl (meth) acrylate, 3-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, and 6-hydroxy (meth) acrylate.
  • the (meth) acrylic polymer is mainly composed of alkyl (meth) acrylate in the weight ratio of all constituent monomers, and the ratio of the hydroxyl group-containing monomer in the (meth) acrylic polymer is in the weight ratio of all constituent monomers. 0.01 to 15% is preferable, 0.03 to 10% is more preferable, and 0.05 to 7% is more preferable.
  • the (meth) acrylic polymer has a polymerizable functional group having an unsaturated double bond such as a (meth) acryloyl group or a vinyl group for the purpose of improving adhesiveness and heat resistance.
  • the above copolymerization monomers can be introduced by copolymerization.
  • copolymerization monomer examples include (meth) acrylic acid, carboxyethyl (meth) acrylate, carboxypentyl (meth) acrylate, itaconic acid, maleic acid, fumaric acid, crotonic acid and other carboxyl group-containing monomers; maleic anhydride , Monomers containing acid anhydride groups such as itaconic anhydride; caprolactone adducts of acrylic acid; styrene sulfonic acid and allyl sulfonic acid, 2- (meth) acrylamide-2-methylpropane sulfonic acid, (meth) acrylamide propane sulfonic acid, Examples thereof include sulfonic acid group-containing monomers such as 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
  • examples of copolymerizable monomers other than the above include silane-based monomers containing silicon atoms.
  • examples of the silane monomer include 3-acryloxypropyltriethoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane, 4-vinylbutyltrimethoxysilane, 4-vinylbutyltriethoxysilane, and 8-vinyloctyltrimethoxysilane.
  • copolymer monomers examples include tripropylene glycol di (meth) acrylate, tetraethylene glycol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, bisphenol A diglycidyl ether di (meth) acrylate, neo Pentyl glycol di (meth) acrylate, trimethylolpropane tri (meth) acrylate, pentaerythritol tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, dipentaerythritol penta (meth) acrylate, dipentaerythritol hexa (meth) acrylate (Meth) acryloyl such as esterified product of (meth) acrylic acid and polyhydric alcohol such as caprolactone-modified dipentaerythritol hexa (meth) acrylate A polyfunctional monomer having
  • the proportion of the copolymerization monomer (other than the hydroxyl group-containing monomer) in the (meth) acrylic polymer is not particularly limited, but is about 0 to 20%, about 0.1 to 15% in the weight ratio of all constituent monomers, Further, it is preferably about 0.1 to 10%.
  • carboxyl group-containing monomers are preferably used from the viewpoint of adhesiveness and durability.
  • the proportion is preferably 0.05 to 10% by weight, more preferably 0.1 to 8% by weight, and further preferably 0.2 to 6% by weight. .
  • the (meth) acrylic polymer of the present invention usually has a weight average molecular weight in the range of 500,000 to 3,000,000. In view of durability, particularly heat resistance, it is preferable to use those having a weight average molecular weight of 700,000 to 2,700,000. Further, it is preferably 800,000 to 2.5 million. A weight average molecular weight of less than 500,000 is not preferable in terms of heat resistance. On the other hand, if the weight average molecular weight is more than 3 million, a large amount of dilution solvent is required to adjust the viscosity for coating, which is not preferable.
  • 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.
  • 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 of the present invention contains a mercapto group-containing silane coupling agent in addition to the base polymer having a hydroxyl group (for example, (meth) acrylic polymer).
  • a mercapto group-containing silane coupling agent examples include 3-mercaptopropyltrimethoxysilane, 3-mercaptopropylmethyldimethoxysilane, 3-mercaptopropyltriethoxysilane, 3-mercaptopropylmethyldiethoxysilane, and ⁇ -mercaptomethylphenylethyl.
  • Examples include compounds having a mercapto group such as trimethoxysilane, mercaptomethyltrimethoxysilane, 6-mercaptohexyltrimethoxysilane, and 10-mercaptodecyltrimethoxysilane.
  • an oligomer type mercapto group-containing silane coupling agent having two or more alkoxysilyl groups in the molecule is preferable.
  • Specific examples include X-41-1805, X-41-1818, and X-41-1810 manufactured by Shin-Etsu Chemical Co., Ltd. These mercapto group-containing silane coupling agents are preferred because they are less likely to volatilize and are effective in improving durability because they have a plurality of alkoxysilyl groups.
  • the oligomer type refers to a polymer of monomer dimer or more and less than about 100 mer, and the weight average molecular weight of the oligomer type silane coupling agent is preferably about 300 to 30,000.
  • the number of alkoxysilyl groups in the oligomer type mercapto group-containing silane coupling agent may be two or more in the molecule, and the number is not limited.
  • the amount of the alkoxy group in the oligomer type mercapto group-containing silane coupling agent is preferably 10 to 60% by weight, more preferably 20 to 50% by weight, more preferably 20 to 40% in the silane coupling agent. More preferably, it is% by weight.
  • alkoxy group is not limited, and examples thereof include alkoxy groups having 1 to 6 carbon atoms such as methoxy, ethoxy, propoxy, butoxy, pentyloxy, hexyloxy and the like. Among these, methoxy and ethoxy are preferable, and methoxy is more preferable. It is also preferred that both methoxy and ethoxy are contained in one molecule.
  • the mercapto group content of the mercapto group-containing silane coupling agent is preferably, for example, a mercapto equivalent of 1000 g / mol or less, more preferably 800 g / mol or less in the case of a mercapto group (—SH). More preferably, it is 500 g / mol or less.
  • the lower limit of the mercapto equivalent is not particularly limited, but for example, it is preferably 200 g / mol or more.
  • the mercapto group-containing silane coupling agent may be used alone, or may be used in combination of two or more, but the total content is a base polymer having the hydroxyl group (for example, (Meth) acrylic polymer) 0.001 to 5 parts by weight, preferably 0.01 to 3 parts by weight, more preferably 0.02 to 2 parts by weight, and more preferably 0.05 to 1 part per 100 parts by weight. Part by weight is particularly preferred.
  • hydroxyl group for example, (Meth) acrylic polymer
  • a silane coupling agent other than the mercapto group-containing silane coupling agent can also be added to the pressure-sensitive adhesive composition of the present invention.
  • Other coupling agents include 3-aminopropyltrimethoxysilane, N-2- (aminoethyl) -3-aminopropylmethyldimethoxysilane, 3-triethoxysilyl-N- (1,3-dimethylbutylidene)
  • Amino group-containing silane coupling agents such as propylamine and N-phenyl- ⁇ -aminopropyltrimethoxysilane, (meth) acryl group-containing silanes such as 3-acryloxypropyltrimethoxysilane and 3-methacryloxypropyltriethoxysilane
  • Examples thereof include coupling agents and isocyanate group-containing silane coupling agents such as 3-isocyanatopropyltriethoxysilane.
  • Silane coupling agents other than the mercapto group-containing silane coupling agent can be added within a range that does not impair the effects of the present invention, and the amount used is not particularly limited. From the viewpoint of adhesion, it can be used in the range of 3 parts by weight or less, more preferably 2 parts by weight or less, and further in the range of 1 part by weight or less with respect to 100 parts by weight of the pressure-sensitive adhesive composition. . Adhesion can be improved by using a silane coupling agent other than a mercapto group. However, since a silane coupling agent other than a mercapto group can also impart reworkability, the adhesion tends to deteriorate if the amount added is large.
  • the pressure-sensitive adhesive composition of the present invention can contain a crosslinking agent.
  • the crosslinking agent may be used alone or in combination of two or more.
  • the content of the crosslinking agent as a whole is preferably 2 parts by weight or less, more preferably 1.5 parts by weight or less, and further preferably 1 part by weight with respect to 100 parts by weight of the base polymer having a hydroxyl group. The following is preferred.
  • the pressure-sensitive adhesive composition of the present invention preferably contains a crosslinking agent (b) that does not react with hydroxyl groups as the crosslinking agent.
  • the crosslinking agent (b) that does not react with the hydroxyl group can be used in combination with an isocyanate crosslinking agent, but is suitable in an embodiment that does not contain an isocyanate crosslinking agent.
  • the crosslinking agent (b) that does not react with the hydroxyl group does not particularly require aging until the predetermined gel fraction is reached after formation of the pressure-sensitive adhesive layer, and the gel fraction 80 from the initial stage when the pressure-sensitive adhesive layer is formed is 80%.
  • % Hard material can be produced. Furthermore, since the crosslinking with the crosslinking agent (b) that does not react with the hydroxyl group is proceeding in the pressure-sensitive adhesive layer, the hydroxyl group of the base polymer must efficiently react with the silanol group of the mercapto group-containing silane coupling agent. It is considered that the gel fraction of the pressure-sensitive adhesive layer can be hardened to 80% or more from the initial stage.
  • the crosslinking agent (b) may be used singly or as a mixture of two or more, but the total content is 100 parts by weight of the base polymer having a hydroxyl group.
  • the crosslinking agent (b) is preferably 0.01 to 2 parts by weight, more preferably 0.04 to 1.5 parts by weight, further preferably 0.05 to 1 part by weight, More preferably, it is 0.4 to 0.6 parts by weight. In order to adjust processability, reworkability, cross-linking stability, peelability, and the like, it is appropriately selected within this range.
  • crosslinking agent (b) a peroxide can be preferably used.
  • 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 is 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 at 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.
  • any radical active species can be used as long as it generates radical active species by heating or light irradiation to advance the crosslinking of the base polymer of the pressure-sensitive adhesive composition.
  • peroxides examples 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 0.5 ° C.), t-hexyl peroxypivalate (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
  • 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 catalog, for example, “Organic peroxide catalog 9th edition by Nippon Oil & Fats Co., Ltd.” (May 2003) ".
  • an organic crosslinking agent or a polyfunctional metal chelate can be used as the crosslinking agent other than the crosslinking agent (b).
  • the organic crosslinking agent include an isocyanate crosslinking agent, an epoxy crosslinking agent, and an imine crosslinking agent.
  • a polyfunctional metal chelate is one in which a polyvalent metal is covalently or coordinately bonded to an organic compound.
  • polyvalent metal atoms include Al, Cr, Zr, Co, Cu, Fe, Ni, V, Zn, In, Ca, Mg, Mn, Y, Ce, Sr, Ba, Mo, La, Sn, Ti, and the like.
  • the atom in the organic compound that is covalently bonded or coordinated include an oxygen atom
  • examples of the organic compound include an alkyl ester, an alcohol compound, a carboxylic acid compound, an ether compound, and a ketone compound.
  • the amount of the crosslinking agent other than the crosslinking agent (b) is preferably controlled so that a hard material having a gel fraction of 80% or more from the initial stage of forming the pressure-sensitive adhesive layer can be produced.
  • the crosslinking agent other than the crosslinking agent (b) can be used in a range of 2 parts by weight or less, more preferably 1 part by weight or less, and further 0.5 parts by weight with respect to 100 parts by weight of the pressure-sensitive adhesive composition. It can be included in the following ranges.
  • an isocyanate-based crosslinking agent is used as a crosslinking agent other than the crosslinking agent (b)
  • the amount used is controlled within a range that does not require aging.
  • Isocyanate-based crosslinking agents are preferable from the viewpoint of securing anchoring force to an adherend such as a film, and are also preferable from the viewpoint of suppressing the dimensional change of the polarizing film because the pressure-sensitive adhesive layer becomes hard. Furthermore, it is particularly preferable to use an isocyanate cross-linking agent and a cross-linking agent (b) that does not react with a hydroxyl group in combination because a stronger anchoring force can be obtained.
  • the pressure-sensitive adhesive composition of the present invention may contain an alkali metal salt, a polyether-modified silicone compound, and other known additives.
  • a polyether compound of polyalkylene glycol such as polypropylene glycol, coloring Powders, dyes, surfactants, plasticizers, tackifiers, surface lubricants, leveling agents, softeners, antioxidants, anti-aging agents, light stabilizers, UV absorbers, polymerization prohibited
  • An agent, an inorganic or organic filler, a metal powder, a particulate shape, a foil-like material, and the like can be appropriately added depending on the use.
  • the pressure-sensitive adhesive composition forms a pressure-sensitive adhesive layer.
  • it is necessary to fully consider the influence of the crosslinking treatment temperature and the crosslinking treatment time as well as adjusting the addition amount of the entire crosslinking agent. preferable.
  • the crosslinking treatment temperature and crosslinking treatment time can be adjusted depending on the crosslinking agent used.
  • the crosslinking treatment temperature is preferably 170 ° C. or lower.
  • 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 composition is applied to a release-processed separator and the like, and after forming a pressure-sensitive adhesive layer by drying and removing a polymerization solvent or the like, in the embodiment of FIGS. 1 or 2, in the embodiment shown in FIGS. 1 and 2, the adhesive composition is applied to the anchor coat layer, and the polymerization solvent is dried and removed to form the adhesive layer on a polarizing film.
  • one or more solvents other than the polymerization solvent may be added as appropriate.
  • a silicone release liner is preferably used as the release-treated separator.
  • the method of drying the pressure-sensitive adhesive composition can be appropriately determined depending on the purpose. Can be employed.
  • a method of heating and drying the coating film is used.
  • the heating and drying temperature is preferably 40 ° C to 200 ° C, more preferably 50 ° C to 180 ° C, and particularly preferably 70 ° C to 170 ° C. By setting the heating temperature in the above range, an adhesive layer having excellent adhesive properties can be obtained.
  • the drying time is preferably 5 seconds to 20 minutes, more preferably 5 seconds to 10 minutes, and particularly preferably 10 seconds to 5 minutes.
  • 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 2 to 50 ⁇ m, more preferably 2 to 40 ⁇ m, and still more preferably 5 to 35 ⁇ m.
  • the pressure-sensitive adhesive layer When the pressure-sensitive adhesive layer is exposed, the pressure-sensitive adhesive layer may be protected with a peeled sheet (separator) until practical use.
  • constituent material of the separator examples include, for example, 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 used suitably from the point which is excellent in 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 separator is usually about 5 to 200 ⁇ m, preferably about 5 to 100 ⁇ m.
  • mold release and antifouling treatment with a silicone type, fluorine type, long chain alkyl type or fatty acid amide type release agent, silica powder, etc., coating type, kneading type, vapor deposition type It is also possible to carry out antistatic treatment such as.
  • 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 separator.
  • seat which carried out the peeling process used in preparation of said polarizing film with an adhesive layer can be used as a separator of the polarizing film with an adhesive layer as it is, and can simplify in the surface of a process.
  • a surface protective film can be provided in the polarizing film with an adhesive layer.
  • the surface protective film usually has a base film and an adhesive layer, and protects the polarizer via the adhesive layer.
  • a film material having isotropic property or close to isotropic property is selected from the viewpoints of inspection property and manageability.
  • film materials include polyester resins such as polyethylene terephthalate film, cellulose resins, acetate resins, polyether sulfone resins, polycarbonate resins, polyamide resins, polyimide resins, polyolefin resins, acrylic resins, and the like. Examples thereof include transparent polymers such as resins. Of these, polyester resins are preferred.
  • the base film can be used as a laminate of one kind or two or more kinds of film materials, and a stretched product of the film can also be used.
  • the thickness of the base film is generally 500 ⁇ m or less, preferably 10 to 200 ⁇ m.
  • the pressure-sensitive adhesive that forms the pressure-sensitive adhesive layer of the surface protective film includes a (meth) acrylic polymer, a silicone-based polymer, a polyester, a polyurethane, a polyamide, a polyether, a fluorine-based or a rubber-based pressure-sensitive adhesive. Can be appropriately selected and used. From the viewpoints of transparency, weather resistance, heat resistance and the like, an acrylic pressure-sensitive adhesive having an acrylic polymer as a base polymer is preferable.
  • the thickness (dry film thickness) of the pressure-sensitive adhesive layer is determined according to the required adhesive force. Usually, it is about 1 to 100 ⁇ m, preferably 5 to 50 ⁇ m.
  • the surface protective film can be provided with a release treatment layer on the surface opposite to the surface on which the pressure-sensitive adhesive layer is provided on the base film, using a low adhesion material such as silicone treatment, long-chain alkyl treatment, or fluorine treatment. .
  • the polarizing film with a pressure-sensitive adhesive layer of the present invention can be used as an optical film laminated with another optical layer in practical use.
  • the optical layer is not particularly limited.
  • a liquid crystal display device such as a reflection plate, a semi-transmission plate, a retardation plate (including wavelength plates such as 1/2 and 1/4), and a viewing angle compensation film.
  • One or more optical layers that may be used can be used.
  • a film, a circularly polarizing film, a wide viewing angle polarizing film in which a viewing angle compensation film is further laminated on the polarizing film, or a polarizing film in which a brightness enhancement film is further laminated on the polarizing film are preferable.
  • An optical film obtained by laminating the above optical layer on a polarizing film with a pressure-sensitive adhesive layer can also be formed by sequentially laminating separately in the manufacturing process of a liquid crystal display device, etc. Is excellent in quality stability and assembly work, and has the advantage of improving the manufacturing process of liquid crystal display devices and the like.
  • an appropriate adhesive means such as a pressure-sensitive adhesive layer can be used.
  • their optical axes can be arranged at an appropriate angle depending on the intended retardation characteristics and the like.
  • the polarizing film or optical film with an adhesive layer of the present invention can be preferably used for forming various 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, a polarizing film with an adhesive layer or an optical film, and an illumination system as necessary, and incorporating a drive circuit.
  • a liquid crystal display device is generally formed by appropriately assembling components such as a liquid crystal cell, a polarizing film with an adhesive layer or an optical film, and an illumination system as necessary, and incorporating a drive circuit.
  • the polarizing film with a pressure-sensitive adhesive layer or the optical film according to the present invention is used.
  • the liquid crystal cell any type such as IPS type and VA type can be used.
  • liquid crystal display devices such as a liquid crystal display device in which a polarizing film with an adhesive layer or an optical film is disposed on one side or both sides of a liquid crystal cell, or a backlight or reflector used in an illumination system can be formed.
  • the polarizing film with a pressure-sensitive adhesive layer or the optical film according to the present invention can be installed on one side or both sides of the liquid crystal cell.
  • they may be the same or different.
  • 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.
  • a diffusing plate for example, 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.
  • a protective plate such as a prism array, a lens array sheet, a light diffusing plate, a backlight, etc.
  • a prism array such as a prism array, a lens array sheet, a light diffusing plate, a backlight, etc.
  • IPA copolymerized PET amorphous isophthalic acid copolymerized polyethylene terephthalate (IPA copolymerized PET) film (thickness: 100 ⁇ m) having a water absorption of 0.75% and Tg of 75 ° C. is subjected to corona treatment.
  • Alcohol polymerization degree 4200, saponification degree 99.2 mol%) and acetoacetyl-modified PVA (polymerization degree 1200, acetoacetyl modification degree 4.6%, saponification degree 99.0 mol% or more, manufactured by Nippon Synthetic Chemical Industry Co., Ltd.
  • aqueous solution containing 9: 1 ratio of the trade name “Gosefimer Z200”) was applied and dried at 25 ° C. to form a PVA-based resin layer having a thickness of 11 ⁇ m, thereby preparing a laminate.
  • the obtained laminate was uniaxially stretched in the longitudinal direction (longitudinal direction) 2.0 times between rolls having different peripheral speeds in an oven at 120 ° C. (air-assisted stretching process).
  • the laminate was immersed in an insolubilization bath (a boric acid aqueous solution obtained by blending 4 parts by weight of boric acid with respect to 100 parts by weight of water) for 30 seconds (insolubilization treatment).
  • boric acid aqueous solution obtained by blending 3 parts by weight of potassium iodide and 3 parts by weight of boric acid with respect to 100 parts by weight of water.
  • Crosslinking treatment Thereafter, the laminate was immersed in a boric acid aqueous solution (an aqueous solution obtained by blending 4 parts by weight of boric acid and 5 parts by weight of potassium iodide with respect to 100 parts by weight of water) at a liquid temperature of 70 ° C.
  • uniaxial stretching was performed between rolls having different peripheral speeds in the longitudinal direction (longitudinal direction) so that the total stretching ratio was 5.5 times (in-water stretching treatment).
  • the laminate was immersed in a cleaning bath (an aqueous solution obtained by blending 4 parts by weight of potassium iodide with respect to 100 parts by weight of water) at a liquid temperature of 30 ° C. (cleaning treatment).
  • a cleaning bath an aqueous solution obtained by blending 4 parts by weight of potassium iodide with respect to 100 parts by weight of water
  • cleaning treatment a liquid temperature of 30 ° C.
  • Protective film A (meth) acrylic resin film having a lactone ring structure with a thickness of 40 ⁇ m was subjected to corona treatment on the easy adhesion treated surface.
  • An ultraviolet curable adhesive was prepared by mixing 40 parts by weight of N-hydroxyethylacrylamide (HEAA), 60 parts by weight of acryloylmorpholine (ACMO), and 3 parts by weight of a photoinitiator “IRGACURE 819” (manufactured by BASF).
  • HEAA N-hydroxyethylacrylamide
  • ACMO acryloylmorpholine
  • UVGACURE 819 a photoinitiator
  • polyvinyl alcohol-based resin composition > 100 parts of a polyvinyl alcohol resin having a polymerization degree of 2500 and a saponification degree of 99.7 mol% and 5 parts of methylol melamine (manufactured by DIC, trade name “Watersol: S-695”) were dissolved in pure water to obtain a solid content. An aqueous solution having a concentration of 4% by weight was prepared.
  • the acrylic adhesive solution is uniformly applied to the surface of a polyethylene terephthalate film (separator film) treated with a silicone release agent, and dried for 2 minutes in an air circulation type thermostatic oven at 155 ° C.
  • a pressure-sensitive adhesive layer having a thickness of 20 ⁇ m was formed on the surface.
  • Example 1 Manufacturing a single protective polarizing film with an anchor coat layer> The thickness after drying the polyvinyl alcohol-based resin composition adjusted to 25 ° C. on the surface of the polarizing film (polarizer) of the piece protective polarizing film (polarizer surface provided with no protective film) with a wire bar coater. After coating to 1 ⁇ m, it was dried with hot air at 90 ° C. for 20 seconds to produce a piece protective polarizing film with an anchor coat layer.
  • Example 2 the type of aqueous resin to be blended in the anchor coat layer, the blending amount of methylol melamine (the blending part is a value relative to 100 parts of the water based resin), the type of silane coupling agent and crosslinking agent in the pressure-sensitive adhesive composition And a blending amount (the blending part is a value with respect to 100 parts of the acrylic polymer) as shown in Table 1, in the same manner as in Example 1, the piece protective polarizing film with an anchor coat layer and the pressure-sensitive adhesive A polarizing film with a layer was produced.
  • the blending part is a value relative to 100 parts of the water based resin
  • a blending amount the blending part is a value with respect to 100 parts of the acrylic polymer
  • Sample 1 was prepared by scraping about 0.1 g from the pressure-sensitive adhesive layer formed on the release-treated surface of the separator film within 1 minute.
  • the sample 1 was wrapped in a Teflon (registered trademark) film having a diameter of 0.2 ⁇ m (trade name “NTF1122”, manufactured by Nitto Denko Corporation), and then tied with a kite string to obtain a sample 2.
  • the weight of sample 2 before being subjected to the following test was measured, and this was designated as weight A.
  • the weight A is the total weight of the sample 1 (adhesive layer), the Teflon (registered trademark) film, and the kite string.
  • the total weight of the Teflon (registered trademark) film and the kite string was defined as weight B.
  • the sample 2 was put in a 50 ml container filled with ethyl acetate and allowed to stand at 23 ° C. for 1 week. Thereafter, the sample 2 was taken out from the container, dried in a dryer at 130 ° C. for 2 hours to remove ethyl acetate, and the weight of the sample 2 was measured. The weight of Sample 2 after being subjected to the test was measured, and this was designated as weight C.
  • the initial gel fraction of the pressure-sensitive adhesive layer is preferably 80% or more. A low gel fraction leads to defects such as dents remaining easily.
  • the polarizing film with the pressure-sensitive adhesive layer obtained in Examples and Comparative Examples was cut into a size of 25 mm ⁇ 150 mm, and indium-tin oxide was vapor-deposited on the pressure-sensitive adhesive layer surface and the surface of the 50 ⁇ m-thick polyethylene terephthalate film. It bonded together so that the vapor deposition surface of a vapor deposition film might contact. Thereafter, the end portion of the polyethylene terephthalate film was peeled off by hand, and after confirming that the pressure-sensitive adhesive layer was adhered to the polyethylene terephthalate film side, it was 180 ° using a tensile tester AG-1 manufactured by Shimadzu Corporation.
  • An anchoring force of 15 N / 25 mm or more is good because there is no adhesive residue at the time of reworking, no adhesive chipping or adhesive removal at the time of processing.
  • the destruction state at the time of peeling is indicated by “cohesive failure (breakage of the anchor coat layer or pressure-sensitive adhesive layer)” or “interfacial peeling (peeling at the interface between the anchor coat layer and the pressure-sensitive adhesive layer)”.
  • the anchoring force was measured after aging for 48 hours because only the isocyanate-based crosslinking agent was used as the crosslinking agent for the pressure-sensitive adhesive layer.
  • An Example and another comparative example are the values measured within 24 hours (not aging) after producing a polarizing film with an adhesive layer.
  • peroxides are trade names: Nyper BMT 40SV, benzoyl peroxide, manufactured by NOF Corporation;
  • Isocyanate is trade name: Takenate D110N, trimethylolpropane adduct of xylylene diisocyanate, manufactured by Mitsui Chemicals, Inc .;
  • X-41-1810 oligomer type mercapto group-containing silane coupling agent, alkoxy group amount: 30% by weight, mercapto equivalent: 450 g / mol, manufactured by Shin-Etsu Chemical Co., Ltd .;
  • KBM-802 Monomer-type mercapto group-containing silane coupling agent, manufactured by Shin-Etsu Chemical Co., Ltd .;
  • KBM-803 Monomer type mercapto group-containing silane coupling agent, manufactured by Shin-Etsu Chemical Co., Ltd .;
  • X-41-1056 oligomer type epoxy group-containing silane coupling agent, alkoxy group
  • the crosslinking agent of Example 10 is a combined system of an isocyanate crosslinking agent and a peroxide crosslinking agent.
  • Oxazoline group-containing polymer Epocross WS-700 (manufactured by Nippon Shokubai Co., Ltd.); Polyurethane resin: Takelac W-6020 (manufactured by Mitsui Chemicals Polyurethanes); Epoxy resin: Celoxide 2021P (manufactured by Daicel Corporation);
  • Polarizer 1 Polarizer 2 Anchor coat layer (Polyvinyl alcohol resin is the main component) DESCRIPTION OF SYMBOLS 3 Adhesive layer 4 Separator 5, 5 'Protective film 10 Polarizing film with an adhesive layer 11 Polarizing film with an adhesive layer

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Abstract

La présente invention vise à fournir un film polarisant équipé de couche adhésive ayant, dans l'ordre, un polariseur, une couche de revêtement d'ancrage contenant une résine à base d'alcool polyvinylique, et une couche adhésive, la couche de revêtement d'ancrage et la couche adhésive ayant une bonne force d'ancrage, même si la couche adhésive ne contient pas d'agent de réticulation à base d'isocyanate. L'invention concerne un film polarisant équipé de couche adhésive ayant, dans l'ordre, un polariseur, une couche de revêtement d'ancrage et une couche adhésive, la couche de revêtement d'ancrage étant formée à partir d'une composition de résine à base d'eau contenant une résine à base d'eau et un composé (a) ayant, au niveau de l'extrémité moléculaire, au moins un alcool primaire capable de réagir avec un groupe hydroxyle, et la couche adhésive étant formée à partir d'une composition adhésive contenant un polymère de base ayant un groupe hydroxyle et un agent de couplage de silane contenant un groupe mercapto.
PCT/JP2016/078445 2015-09-30 2016-09-27 Film polarisant équipé de couche adhésive, son procédé de production, et dispositif d'affichage d'image WO2017057357A1 (fr)

Priority Applications (3)

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KR1020177009972A KR101934940B1 (ko) 2015-09-30 2016-09-27 점착제층 부착 편광 필름, 그 제조 방법 및 화상 표시 장치
CN201680003216.0A CN107076918B (zh) 2015-09-30 2016-09-27 带粘合剂层的偏振膜、其制造方法、以及图像显示装置
KR1020187037864A KR102157234B1 (ko) 2015-09-30 2016-09-27 점착제층 부착 편광 필름, 그 제조 방법 및 화상 표시 장치

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JP2016186801A JP6154054B2 (ja) 2015-09-30 2016-09-26 粘着剤層付偏光フィルム、その製造方法、および画像表示装置
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH115851A (ja) * 1997-06-17 1999-01-12 Fuji Photo Film Co Ltd セルロースアセテートフイルム、その製造方法および偏光板保護膜
JP2008129258A (ja) * 2006-11-20 2008-06-05 Nitto Denko Corp 偏光板の製造方法、偏光板、光学フィルムおよび画像表示装置
JP2011190302A (ja) * 2010-03-12 2011-09-29 Lintec Corp 粘着剤組成物、粘着剤および粘着シート
JP2012073563A (ja) * 2010-09-03 2012-04-12 Nitto Denko Corp 薄型高機能偏光膜を含む光学フィルム積層体の製造方法
JP2012097162A (ja) * 2010-10-29 2012-05-24 Cheil Industries Inc 粘着剤組成物

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH115851A (ja) * 1997-06-17 1999-01-12 Fuji Photo Film Co Ltd セルロースアセテートフイルム、その製造方法および偏光板保護膜
JP2008129258A (ja) * 2006-11-20 2008-06-05 Nitto Denko Corp 偏光板の製造方法、偏光板、光学フィルムおよび画像表示装置
JP2011190302A (ja) * 2010-03-12 2011-09-29 Lintec Corp 粘着剤組成物、粘着剤および粘着シート
JP2012073563A (ja) * 2010-09-03 2012-04-12 Nitto Denko Corp 薄型高機能偏光膜を含む光学フィルム積層体の製造方法
JP2012097162A (ja) * 2010-10-29 2012-05-24 Cheil Industries Inc 粘着剤組成物

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