WO2018180895A1 - Film polarisant avec couche d'adhésif, et dispositif d'affichage d'image - Google Patents

Film polarisant avec couche d'adhésif, et dispositif d'affichage d'image Download PDF

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Publication number
WO2018180895A1
WO2018180895A1 PCT/JP2018/011430 JP2018011430W WO2018180895A1 WO 2018180895 A1 WO2018180895 A1 WO 2018180895A1 JP 2018011430 W JP2018011430 W JP 2018011430W WO 2018180895 A1 WO2018180895 A1 WO 2018180895A1
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Prior art keywords
adhesive layer
sensitive adhesive
pressure
polarizing film
meth
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PCT/JP2018/011430
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English (en)
Japanese (ja)
Inventor
藤田　雅人
有 森本
雄祐 外山
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日東電工株式会社
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Priority to KR1020197024164A priority Critical patent/KR102405461B1/ko
Priority to CN201880015396.3A priority patent/CN110383120B/zh
Publication of WO2018180895A1 publication Critical patent/WO2018180895A1/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
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
    • C09J7/38—Pressure-sensitive adhesives [PSA]
    • C09J7/381—Pressure-sensitive adhesives [PSA] based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
    • C09J7/385—Acrylic polymers
    • C—CHEMISTRY; METALLURGY
    • 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
    • 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
    • C09J11/04—Non-macromolecular additives inorganic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02—Non-macromolecular additives
    • C09J11/06—Non-macromolecular additives organic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
    • 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
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G—PHYSICS
    • 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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • 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
    • C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
    • C09J2203/318—Applications of adhesives in processes or use of adhesives in the form of films or foils for the production of liquid crystal displays
    • 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
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
    • C09J2301/312—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier parameters being the characterizing feature

Definitions

  • the present invention relates to a polarizing film and a polarizing film with an adhesive layer having an adhesive layer provided on the polarizing film. Furthermore, this invention relates to image display apparatuses, such as a liquid crystal display device using the said polarizing film with an adhesive layer, an organic electroluminescent display device, and PDP.
  • 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.
  • the release film is peeled off from the pressure-sensitive adhesive layer of the polarizing film with the pressure-sensitive adhesive layer. Static electricity is generated.
  • the static electricity generated in this way affects the orientation of the liquid crystal inside the liquid crystal display device, leading to defects. Further, display unevenness due to static electricity may occur when the liquid crystal display device is used.
  • the generation of static electricity can be suppressed, for example, by forming an antistatic layer on the outer surface of the polarizing film, but the effect is small and there is a problem that static electricity generation cannot be fundamentally prevented.
  • Patent Documents 1 to 3 propose mixing an ionic compound with the pressure-sensitive adhesive forming the pressure-sensitive adhesive layer.
  • Patent Document 1 proposes an optical film pressure-sensitive adhesive composition containing an alkali metal salt and / or an organic cation-anion salt.
  • Patent Document 2 proposes a pressure-sensitive adhesive composition containing an onium-anion salt and an alkali metal salt as a raw material for the pressure-sensitive adhesive layer of the polarizing film with a pressure-sensitive adhesive layer.
  • Patent Document 3 proposes a pressure-sensitive adhesive composition containing an alkali metal salt as a raw material for a pressure-sensitive adhesive layer of a pressure-sensitive adhesive polarizing plate.
  • a transparent protective film is provided only on one side of a polarizer, and a polarizing film with an adhesive layer provided with an adhesive layer may be used without providing a transparent protective film on the other side. is there. Since the polarizing film with the pressure-sensitive adhesive layer has the transparent protective film only on one side, the cost for the transparent protective film can be reduced as compared with the case where the transparent protective film is provided on both sides.
  • lithium-organic anions such as alkali metal salts described in Patent Documents 1 to 3, particularly lithium bis (trifluoromethanesulfonyl) imide (LiTFSI) are used as ionic compounds.
  • LiTFSI lithium bis (trifluoromethanesulfonyl) imide
  • An object of the present invention is to provide a polarizing film with a pressure-sensitive adhesive layer that is less likely to have an antistatic function and a low degree of polarization even when exposed to a humidified environment and that is excellent in transparency.
  • Another object of the present invention is to provide an image display device using the polarizing film with the pressure-sensitive adhesive layer.
  • the present invention is a polarizing film and a polarizing film with a pressure-sensitive adhesive layer having a pressure-sensitive adhesive layer provided on the polarizing film
  • the polarizing film has a transparent protective film only on one side of the polarizer, the pressure-sensitive adhesive layer is provided on the polarizer on the side not having the transparent protective film, and the pressure-sensitive adhesive layer is (meta ) Formed from a pressure-sensitive adhesive composition containing an acrylic polymer and an alkali metal salt,
  • the (meth) acrylic polymer relates to a polarizing film with a pressure-sensitive adhesive layer, which contains a monomer (1) having a nitrogen atom and a carbon-carbon double bond as a monomer unit.
  • the adhesive layer of the polarizing film with the pressure-sensitive adhesive layer is blended with an alkali metal salt such as a lithium-organic anion salt
  • an alkali metal salt such as a lithium-organic anion salt
  • the alkali metal salt in the adhesive layer is polarized. This is considered to be due to uneven distribution by moving to the child side, thereby increasing the surface resistance value of the pressure-sensitive adhesive layer.
  • the base polymer of the pressure-sensitive adhesive layer by using a (meth) acrylic polymer in which a monomer (1) having a nitrogen atom and a carbon-carbon double bond is introduced by copolymerization, the pressure-sensitive adhesive layer is brought into a humid environment. It has been found that even when exposed, the antistatic function is unlikely to deteriorate. The following can be considered as the reason.
  • the (meth) acrylic polymer in which the monomer (1) having a nitrogen atom and a carbon-carbon double bond is introduced by copolymerization interacts with the alkali metal salt, so that the alkali metal salt in the pressure-sensitive adhesive layer becomes a polarizer. It is considered that the increase in the surface resistance value of the pressure-sensitive adhesive layer was suppressed because it was difficult to move to the side and the uneven distribution on the polarizer side was suppressed.
  • the (meth) acrylic polymer in which the monomer (1) having a nitrogen atom and a carbon-carbon double bond is introduced by copolymerization has a polar group, so that compatibility with an alkali metal salt is improved. Even when the content of the alkali metal salt is increased, the pressure-sensitive adhesive layer is less likely to become cloudy, and the transparency of the pressure-sensitive adhesive layer is difficult to decrease. Thereby, the fall of the optical characteristic of the polarizing film with an adhesive layer can be suppressed.
  • an alkali metal salt into the pressure-sensitive adhesive layer of the polarizing film with a pressure-sensitive adhesive layer, even when the polarizing film with a pressure-sensitive adhesive layer is exposed to a humidified environment, the polarizer becomes difficult to deteriorate, It was found that the degree of polarization is difficult to decrease. The following can be considered as the reason. Since the binding energy between the alkali metal cation and iodine anion in the polarizer is high, their interaction increases, and the alkali metal cation stabilizes the iodine complex in the polarizer at the interface between the pressure-sensitive adhesive layer and the polarizer. .
  • the alkali metal in the alkali metal salt preferably has a bond energy with iodine anion (I ⁇ ) of 50 kcal / mol or more, more preferably lithium.
  • the monomer (1) preferably has an amide group. Moreover, it is preferable that the said monomer (1) has a heterocyclic ring containing a nitrogen atom.
  • the (meth) acrylic polymer preferably contains 0.1 to 10% by weight of the monomer (1) as a monomer unit.
  • the pressure-sensitive adhesive composition preferably contains 0.01 to 5 parts by weight of an alkali metal salt with respect to 100 parts by weight of the (meth) acrylic polymer.
  • the pressure-sensitive adhesive layer has a rate of change between the surface resistance value (B) after being stored in a humidified environment of 60 ° C./90% RH for 500 hours and the surface resistance value (A) before being stored in the humidified environment ( B ⁇ 100 / A) is preferably 700% or less.
  • the pressure-sensitive adhesive layer preferably has a surface resistance value (A) of 1.0 ⁇ 10 11 ⁇ / ⁇ or less before being stored in the humidified environment.
  • a polarizer having a thickness of 12 ⁇ m or less can be used.
  • the polarizing film with the pressure-sensitive adhesive layer has a degree of polarization (B) after storage for 500 hours in a humidified environment of 60 ° C./90% RH and a degree of polarization (A) before stored in the humidified environment.
  • the change amount (AB) is preferably within 0.05.
  • the present invention also relates to an image display device using at least one polarizing film with an adhesive layer.
  • the pressure-sensitive adhesive layer of the polarizing film with a pressure-sensitive adhesive layer of the present invention contains a (meth) acrylic polymer in which a monomer (1) having a nitrogen atom and a carbon-carbon double bond is introduced by copolymerization and an alkali metal salt.
  • a polarizing film with a pressure-sensitive adhesive layer that is less likely to have an antistatic function and a low degree of polarization even when exposed to a humidified environment and is excellent in transparency can be obtained.
  • the monomer (1) is a monomer having an amide group and a heterocyclic ring containing a nitrogen atom, and the alkali metal in the alkali metal salt is lithium, the effect of the present invention is maximized. .
  • the pressure-sensitive adhesive composition forming the pressure-sensitive adhesive layer of the polarizing film with a pressure-sensitive adhesive layer of the present invention contains a (meth) acrylic polymer as a base polymer.
  • 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 weight ratio of the alkyl (meth) acrylate is preferably 70% by weight or more in terms of the weight ratio of all constituent monomers (100% by weight) constituting the (meth) acrylic polymer as a monomer unit.
  • the weight ratio of alkyl (meth) acrylate can be considered as the balance of the nitrogen-containing monomer and other copolymerized monomers. Setting the weight ratio of the alkyl (meth) acrylate within the above range is preferable for securing adhesiveness.
  • the monomer (1) having a nitrogen atom and a carbon-carbon double bond is introduced into the (meth) acrylic polymer by copolymerization.
  • the monomer (1) is a compound containing a nitrogen atom in its structure and a polymerizable unsaturated double bond such as a (meth) acryloyl group or a vinyl group.
  • the monomer (1) include maleimide monomers such as maleimide, N-cyclohexylmaleimide, and N-phenylmaleimide; N- (meth) acryloyloxymethylenesuccinimide, N- (meth) acryloyl-6-oxyhexa Succinimide monomers such as methylene succinimide and N- (meth) acryloyl-8-oxyoctamethylene succinimide; N-methyl itaconimide, N-ethyl itaconimide, N-butyl itaconimide, N-octyl itaconimide, N-2- Itaconimide monomers such as ethylhexylitaconimide, N-cyclohexylitaconimide and N-
  • (Meth) acrylic acid aminoalkyl monomers (meth) acrylamide, N, N-dimethyl (meth) acrylamide, N, N-diethyl (meth) acrylamide, N-isopropylacrylamide, N-methyl (meth) acrylamide, N -Butyl (meth) acrylamide, N-hexyl (meth) acrylamide, N-methylol (meth) acrylamide, N-methylol-N-propane (meth) acrylamide, aminomethyl (meth) acrylamide, aminoethyl (meth) acrylamide, mercapto Mechi (Meth) acrylamide monomers such as (meth) acrylamide and mercaptoethyl (meth) acrylamide; N- (meth) such as N- (meth) acryloylmorpholine, N- (meth) acryloylpiperidine, N- (meth) acryloylpyrrolidine Acryloyl group
  • amide group-containing monomers such as (meth) acrylamide monomers, N- (meth) acryloyl group-containing heterocyclic monomers, N- (meth) acryloyl group-containing lactam monomers, and N-vinyl group-containing lactam monomers N- (meth) acryloyl group-containing lactam monomers, and lactam monomers such as N-vinyl group-containing lactam monomers, more preferably N-vinyl group-containing lactam monomers. is there.
  • the said weight ratio of the said monomer (1) is a viewpoint which suppresses the raise of the surface resistance value of an adhesive layer when an adhesive layer is exposed to a humidified environment, and a polarizing film with an adhesive layer is in a humidified environment. From the viewpoint of suppressing the decrease in the degree of polarization when exposed, and from the viewpoint of maintaining the transparency of the pressure-sensitive adhesive layer even when the content of the alkali metal salt in the pressure-sensitive adhesive layer is increased, 0.1 to 10 weights %, More preferably 1 to 5% by weight, still more preferably 1 to 3% by weight.
  • the weight ratio of the nitrogen-containing monomer When the weight ratio of the nitrogen-containing monomer is less than 0.1% by weight, the surface resistance value of the pressure-sensitive adhesive layer tends to increase when the pressure-sensitive adhesive layer is exposed to a humidified environment, When the content of the alkali metal salt is increased, the transparency of the pressure-sensitive adhesive layer tends to decrease. On the other hand, when the weight ratio of the nitrogen-containing monomer exceeds 10% by weight, the degree of polarization tends to decrease or the reworkability tends to decrease when the polarizing film with the pressure-sensitive adhesive layer is exposed to a humidified environment. .
  • (meth) acrylic polymer one or more having 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
  • 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
  • copolymerizable monomers include, for example, 2-hydroxyethyl (meth) acrylate, 3-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, (meth) acrylic acid 6 Hydroxyl-containing monomers such as hydroxyhexyl, 8-hydroxyoctyl (meth) acrylate, 10-hydroxydecyl (meth) acrylate, 12-hydroxylauryl (meth) acrylate and (4-hydroxymethylcyclohexyl) -methyl acrylate Carboxyl group-containing monomers such as (meth) acrylic acid, carboxyethyl (meth) acrylate, carboxypentyl (meth) acrylate, itaconic acid, maleic acid, fumaric acid and crotonic acid; acid anhydrides such as maleic anhydride and itaconic anhydride Physical group-containing monomer; (Meth) acrylic acid alkoxyalkyl monomers such as (meth) acrylic acid
  • vinyl monomers such as vinyl acetate, vinyl propionate, styrene, ⁇ -methylstyrene; epoxy group-containing acrylic monomers such as glycidyl (meth) acrylate; polyethylene glycol (meth) acrylate, (meth ) Polypropylene glycol esters such as polypropylene glycol acrylate, methoxyethylene glycol (meth) acrylate, methoxypolypropylene glycol (meth) acrylate; tetrahydrofurfuryl (meth) acrylate, fluorine (meth) acrylate, silicone (meth) Acrylic ester monomers such as acrylates can also be used. Furthermore, isoprene, butadiene, isobutylene, vinyl ether and the like can be mentioned.
  • 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 A polyfunctional monomer having two or more unsaturated double bonds such as a (meth) acryloyl group and a vinyl group, such as an esterified product of (meth) acrylic acid and a polyhydric alcohol, Polyester (meth)
  • hydroxyl group-containing monomers and carboxyl group-containing monomers are preferably used from the viewpoint of adhesion and durability.
  • a hydroxyl group-containing monomer and a carboxyl group-containing monomer can be used in combination.
  • These copolymerization monomers serve as reaction points with the crosslinking agent when the pressure-sensitive adhesive composition contains a crosslinking agent. Since a hydroxyl group-containing monomer, a carboxyl group-containing monomer, and the like are rich in reactivity with an intermolecular crosslinking agent, they are preferably used for improving the cohesiveness and heat resistance of the resulting pressure-sensitive adhesive layer.
  • a hydroxyl group-containing monomer is preferable from the viewpoint of reworkability, and a carboxyl group-containing monomer is preferable from the viewpoint of achieving both durability and reworkability.
  • the proportion is preferably 0.01 to 15% by weight, more preferably 0.03 to 10% by weight, and further preferably 0.05 to 7% by weight.
  • 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.
  • 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.
  • polymerization initiator examples include 2,2′-azobisisobutyronitrile, 2,2′-azobis (2-amidinopropane) dihydrochloride, 2,2′-azobis [2- (5-methyl-2 -Imidazolin-2-yl) propane] dihydrochloride, 2,2'-azobis (2-methylpropionamidine) disulfate, 2,2'-azobis (N, N'-dimethyleneisobutylamidine), 2,2 Azo initiators such as' -azobis [N- (2-carboxyethyl) -2-methylpropionamidine] hydrate (manufactured by Wako Pure Chemical Industries, Ltd., VA-057), persulfates such as potassium persulfate and ammonium persulfate Di (2-ethylhexyl) peroxydicarbonate, di (4-t-butylcyclohexyl) peroxydicarbonate, di-sec-butyl Oxydicarbonate,
  • the polymerization initiator may be used singly or as a mixture of two or more, but the total content is 0.005 to 1 part by weight with respect to 100 parts by weight of the monomer. Is preferably about 0.02 to 0.5 parts by weight.
  • the amount of the polymerization initiator used is the monomer.
  • the amount is preferably about 0.06 to 0.2 parts by weight, more preferably about 0.08 to 0.175 parts by weight with respect to 100 parts by weight of the total amount of the components.
  • chain transfer agent examples include lauryl mercaptan, glycidyl mercaptan, mercaptoacetic acid, 2-mercaptoethanol, thioglycolic acid, 2-ethylhexyl thioglycolate, and 2,3-dimercapto-1-propanol.
  • the chain transfer agent may be used alone or in combination of two or more, but the total content is 0.1 parts by weight with respect to 100 parts by weight of the total amount of monomer components. Less than or equal to
  • emulsifier used in emulsion polymerization examples include anionic emulsifiers such as sodium lauryl sulfate, ammonium lauryl sulfate, sodium dodecylbenzenesulfonate, ammonium polyoxyethylene alkyl ether sulfate, sodium polyoxyethylene alkyl phenyl ether sulfate, and polyoxy Nonionic emulsifiers such as ethylene alkyl ether, polyoxyethylene alkyl phenyl ether, polyoxyethylene fatty acid ester, polyoxyethylene-polyoxypropylene block polymer and the like can be mentioned. These emulsifiers may be used alone or in combination of two or more.
  • reactive emulsifiers emulsifiers into which radical polymerizable functional groups such as propenyl groups and allyl ether groups are introduced, specifically, for example, Aqualon HS-10, HS-20, KH-10, BC-05 BC-10, BC-20 (all of which are manufactured by Daiichi Kogyo Seiyaku Co., Ltd.), Adekaria Soap SE10N (manufactured by Asahi Denka Kogyo Co., Ltd.) Reactive emulsifiers are preferable because they are incorporated into the polymer chain after polymerization and thus have improved water resistance.
  • the amount of the emulsifier used is preferably 0.3 to 5 parts by weight with respect to 100 parts by weight of the total amount of monomer components, and more preferably 0.5 to 1 part by weight from the viewpoint of polymerization stability and mechanical stability.
  • the pressure-sensitive adhesive composition of the present invention contains an alkali metal salt in addition to the (meth) acrylic polymer.
  • alkali metal salt an organic salt or inorganic salt of alkali metal can be used.
  • the alkali metal ion constituting the cation portion of the alkali metal salt examples include lithium, sodium, potassium, and other ions.
  • the alkali metal ion has a binding energy of 50 kcal / mol or more with the iodine anion (I ⁇ ). More preferably, it is a thing of 70 kcal / mol or more, More preferably, it is a thing of 85 kcal / mol or more, Especially preferably, it is a thing of 105 kcal / mol or more.
  • lithium ions having a binding energy with iodine anion (I ⁇ ) of 140.8 kcal / mol are preferable.
  • the monomer (1) introduced by copolymerization into the (meth) acrylic polymer is basic, when the (meth) acrylic polymer comes into contact with the polarizer, the polarizer deteriorates, Color loss tends to occur.
  • the alkali metal ion constituting the cation part of the alkali metal salt is a lithium ion, the iodine complex in the polarizer can be stabilized, so that the color loss of the polarizer can be effectively suppressed. Can do.
  • the anion part of the alkali metal salt may be composed of an organic material or an inorganic material.
  • the anion portion is preferably bulky.
  • the anion part constituting the organic salt include CH 3 COO ⁇ , CF 3 COO ⁇ , CH 3 SO 3 ⁇ , CF 3 SO 3 ⁇ , (CF 3 SO 2 ) 3 C ⁇ , and C 4 F 9 SO 3.
  • an anion moiety containing a fluorine atom is preferably used because an ionic compound having good ion dissociation properties can be obtained.
  • the anion part constituting the inorganic salt includes Cl ⁇ , Br ⁇ , I ⁇ , AlCl 4 ⁇ , Al 2 Cl 7 ⁇ , BF 4 ⁇ , PF 6 ⁇ , ClO 4 ⁇ , NO 3 ⁇ , AsF 6 ⁇ , SbF. 6 ⁇ , NbF 6 ⁇ , TaF 6 ⁇ , (CN) 2 N ⁇ , and the like are used.
  • a bulky one is preferable, and in the general formula (1), (CF 3 SO 2 ) 2 N ⁇ , (C 2 F 5 SO 2 ) 2 N ⁇ , etc. (Perfluoroalkylsulfonyl) imide represented by (CF 3 SO 2 ) 2 N ⁇ is particularly preferable.
  • alkali metal organic salt examples include sodium acetate, sodium alginate, sodium lignin sulfonate, sodium toluenesulfonate, LiCF 3 SO 3 , Li (CF 3 SO 2 ) 2 N, Li (CF 3 SO 2 ) 2 N, Li (C 2 F 5 SO 2 ) 2 N, Li (C 4 F 9 SO 2 ) 2 N, Li (CF 3 SO 2 ) 3 C, KO 3 S (CF 2 ) 3 SO 3 K, LiO 3 S (CF 2) 3 SO 3 K , and the like, among these LiCF 3 SO 3, Li (CF 3 SO 2) 2 N, Li (C 2 F 5 SO 2) 2 N, Li (C 4 F 9 SO 2 ) 2 N, Li (CF 3 SO 2 ) 3 C and the like are preferable, and Li (CF 3 SO 2 ) 2 N, Li (C 2 F 5 SO 2 ) 2 N, Li (C 4 F 9 SO 2) 2 Fluorine-containing lithium imide salt is more preferably equal, particularly (perfluoroal
  • examples of the alkali metal inorganic salt include lithium perchlorate and lithium iodide.
  • the content of the alkali metal salt in the pressure-sensitive adhesive composition of the present invention is preferably 0.01 to 5 parts by weight with respect to 100 parts by weight of the (meth) acrylic polymer. More preferably, it is 0.1 to 4.5 parts by weight, and still more preferably 0.5 to 4 parts by weight.
  • the content of the alkali metal salt is less than 0.01 parts by weight, it becomes difficult to impart an antistatic function to the pressure-sensitive adhesive layer.
  • the content of the alkali metal salt exceeds 5 parts by weight, even when the (meth) acrylic polymer is used, the pressure-sensitive adhesive layer tends to become cloudy and the transparency of the pressure-sensitive adhesive layer tends to decrease. .
  • the pressure-sensitive adhesive composition of the present invention contains a known organic cation (onium) -anion salt (for example, those described in JP-A No. 2014-048497) as long as the effects of the present invention are not impaired. May be.
  • a known organic cation (onium) -anion salt for example, those described in JP-A No. 2014-048497
  • the pressure-sensitive adhesive composition of the present invention can contain a crosslinking agent.
  • a crosslinking agent an organic crosslinking agent or a polyfunctional metal chelate can be used.
  • the organic crosslinking agent include an isocyanate crosslinking agent, a peroxide 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.
  • an isocyanate-based crosslinking agent and / or a peroxide-type crosslinking agent is preferable.
  • the compounds related to the isocyanate-based crosslinking agent include isocyanate monomers such as tolylene diisocyanate, chlorophenylene diisocyanate, tetramethylene diisocyanate, xylylene diisocyanate, diphenylmethane diisocyanate, hydrogenated diphenylmethane diisocyanate, and these isocyanate monomers.
  • Examples include isocyanate compounds added with trimethylolpropane, isocyanurates, burette compounds, and urethane prepolymer isocyanates such as polyether polyols, polyester polyols, acrylic polyols, polybutadiene polyols, and polyisoprene polyols that have undergone addition reactions. be able to.
  • a polyisocyanate compound which is one or a polyisocyanate compound derived from one selected from the group consisting of hexamethylene diisocyanate, hydrogenated xylylene diisocyanate, and isophorone diisocyanate.
  • hexamethylene diisocyanate, hydrogenated xylylene diisocyanate, isophorone diisocyanate, polyol-modified is selected from the group consisting of hexamethylene diisocyanate, hydrogenated xylylene diisocyanate, and isophorone diisocyanate or a polyisocyanate compound derived therefrom.
  • examples include hexamethylene diisocyanate, polyol-modified hydrogenated xylylene diisocyanate, trimer-type hydrogenated xylylene diisocyanate, and polyol-modified isophorone diisocyanate.
  • the exemplified polyisocyanate compound is preferable because the reaction with a hydroxyl group proceeds rapidly, particularly using an acid or base contained in the polymer as a catalyst, and thus contributes to the speed of crosslinking.
  • 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) ".
  • the amount of the crosslinking agent used is preferably 0.01 to 20 parts by weight, more preferably 0.03 to 10 parts by weight, with respect to 100 parts by weight of the (meth) acrylic polymer. If the crosslinking agent is less than 0.01 parts by weight, the cohesive force of the pressure-sensitive adhesive tends to be insufficient, and foaming may occur during heating. On the other hand, if it exceeds 20 parts by weight, the moisture resistance is not sufficient, Peeling easily occurs in reliability tests.
  • the isocyanate-based crosslinking agent may be used alone or in combination of two or more, but the total content is 100 parts by weight of the (meth) acrylic polymer.
  • the polyisocyanate compound crosslinking agent is preferably contained in an amount of 0.01 to 2 parts by weight, more preferably 0.02 to 2 parts by weight, and 0.05 to 1.5 parts by weight. More preferably, It can be appropriately contained in consideration of cohesive force and prevention of peeling in a durability test.
  • the peroxide may be used alone or as a mixture of two or more, but the total content is based on 100 parts by weight of the (meth) acrylic polymer.
  • the peroxide is 0.01 to 2 parts by weight, preferably 0.04 to 1.5 parts by weight, more preferably 0.05 to 1 part by weight. In order to adjust processability, reworkability, cross-linking stability, peelability, and the like, it is appropriately selected within this range.
  • 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.
  • the pressure-sensitive adhesive composition of the present invention can contain a silane coupling agent.
  • the durability can be improved by using a silane coupling agent.
  • the silane coupling agent include 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropyltriethoxysilane, 3-glycidoxypropylmethyldiethoxysilane, 2- (3, Epoxy group-containing silane coupling agents such as 4-epoxycyclohexyl) ethyltrimethoxysilane, 3-aminopropyltrimethoxysilane, N-2- (aminoethyl) -3-aminopropylmethyldimethoxysilane, 3-triethoxysilyl- Amino group-containing silane coupling agents such as N- (1,3-dimethylbutylidene) propylamine, N-phenyl- ⁇ -aminopropyltrimethoxysilane, 3-acryloxypropyltrimethoxysi
  • the silane coupling agent may be used alone or in combination of two or more, but the total content is 100 parts by weight of the (meth) acrylic polymer.
  • the silane coupling agent is preferably 0.001 to 5 parts by weight, more preferably 0.01 to 1 part by weight, further preferably 0.02 to 1 part by weight, further 0.05 to 0.6 part by weight. Is preferred. It is an amount that improves durability and appropriately maintains the adhesive force to an optical member such as a liquid crystal cell.
  • a polyether-modified silicone compound can be blended in the pressure-sensitive adhesive composition of the present invention.
  • the polyether-modified silicone compound for example, those disclosed in JP 2010-275522 A can be used.
  • the polyether-modified silicone compound has a polyether skeleton, and at least one terminal has the following general formula (1): —SiR a M 3-a (Wherein R is an optionally substituted monovalent organic group having 1 to 20 carbon atoms, M is a hydroxyl group or a hydrolyzable group, and a is an integer of 0 to 2)
  • R is an optionally substituted monovalent organic group having 1 to 20 carbon atoms
  • M is a hydroxyl group or a hydrolyzable group
  • a is an integer of 0 to 2
  • the plurality of R may be the same or different from each other
  • the plurality of M may be the same or different from each other. It has a reactive silyl group represented.
  • R a M 3-a Si—XY— (AO) n —Z (Wherein R is an optionally substituted monovalent organic group having 1 to 20 carbon atoms, M is a hydroxyl group or a hydrolyzable group, and a is an integer of 0 to 2)
  • R is an optionally substituted monovalent organic group having 1 to 20 carbon atoms
  • M is a hydroxyl group or a hydrolyzable group
  • a is an integer of 0 to 2
  • the plurality of R may be the same or different from each other
  • the plurality of M may be the same or different from each other.
  • Z is a hydrogen atom, a monovalent hydrocarbon group having 1 to 10 carbon atoms
  • R, M, X and Y are the same as above.
  • OA is the same as the above AO
  • n is the same as above.
  • Q is a divalent or higher valent hydrocarbon group having 1 to 10 carbon atoms.
  • M is the same as the valence of the hydrocarbon group. ).
  • polyether-modified silicone compound examples include, for example, MS polymers S203, S303, and S810 manufactured by Kaneka Corporation; SILYL EST250 and EST280; Etc.
  • the pressure-sensitive adhesive composition of the present invention may contain other known additives, for example, a polyalkylene glycol polyether compound such as polypropylene glycol, a colorant, a powder such as a pigment, a dye, Surfactant, plasticizer, tackifier, surface lubricant, leveling agent, softener, antioxidant, anti-aging agent, light stabilizer, UV absorber, polymerization inhibitor, inorganic or organic filler, metal It can be added as appropriate according to the application in which powder, particles, foil, etc. are used. Moreover, you may employ
  • 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 polarizing film with the pressure-sensitive adhesive layer of the present invention is provided with a transparent protective film only on one side of the polarizer, and without providing a transparent protective film on the other side, the pressure-sensitive adhesive layer is provided on the polarizer with the pressure-sensitive adhesive composition. Formed.
  • the pressure-sensitive adhesive layer for example, a method in which the pressure-sensitive adhesive composition is applied to a release-treated separator, and the polymerization solvent is dried and removed to form a pressure-sensitive adhesive layer, and then transferred to a polarizing film, or
  • the pressure-sensitive adhesive composition is prepared by applying the pressure-sensitive adhesive composition to a polarizing film, drying and removing the polymerization solvent, and forming a pressure-sensitive adhesive layer on the 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.
  • a method for drying the pressure-sensitive adhesive is appropriately employed depending on the purpose. obtain.
  • 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.
  • 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.
  • the pressure-sensitive adhesive layer can be formed after forming an anchor layer on the surface of the polarizing film or performing various easy adhesion treatments such as corona treatment and plasma treatment. Moreover, you may perform an easily bonding process on the surface of an adhesive layer.
  • 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 has a rate of change between the surface resistance value (B) after being stored in a humidified environment of 60 ° C./90% RH for 500 hours and the surface resistance value (A) before being stored in the humidified environment ( B ⁇ 100 / A) is preferably 700% or less, more preferably 500% or less, further preferably 400% or less, and still more preferably 300% or less.
  • the pressure-sensitive adhesive layer preferably has a surface resistance value (A) before storage in the humidified environment of 1.0 ⁇ 10 11 ⁇ / ⁇ or less, more preferably 8.0 ⁇ 10 10 ⁇ . / ⁇ or less, more preferably 5.0 ⁇ 10 10 ⁇ / ⁇ or less.
  • 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 polarizing film having a transparent protective film only on one side of the polarizer is 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 80 ⁇ m or less.
  • 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.
  • the thickness of the polarizer is preferably 12 ⁇ m or less, more preferably 10 ⁇ m or less, still more preferably 8 ⁇ m or less, even more preferably 7 ⁇ m or less, and particularly preferably 6 ⁇ m from the viewpoint of reducing the thickness and suppressing the occurrence of so-called through cracks. It is as follows. On the other hand, 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.
  • the thin polarizer typically, JP-A-51-069644, JP-A-2000-338329, WO2010 / 100917, PCT / JP2010 / 001460, or Japanese Patent Application No. 2010- And a thin polarizing layer described in Japanese Patent Application No. 269002 and Japanese Patent Application No. 2010-263692.
  • These thin polarizing layers can be obtained by a production method including a step of stretching and dyeing a polyvinyl alcohol-based resin (hereinafter also referred to as PVA-based resin) layer and a stretching resin substrate in the state of a laminate. With this manufacturing method, even if the PVA-based resin layer is thin, it can be stretched without problems such as breakage due to stretching by being supported by the stretching resin substrate.
  • PVA-based resin polyvinyl alcohol-based resin
  • the thin polarizing layer among the production methods including a step of stretching in the state of a laminate and a step of dyeing, WO 2010/100917 pamphlet, PCT / PCT / PCT / JP 2010/001460 specification, or Japanese Patent Application No. 2010-269002 and Japanese Patent Application No. 2010-263692, the one obtained by a production method including a step of stretching in a boric acid aqueous solution is preferable. What is obtained by the manufacturing method including the process of extending
  • the thin high-performance polarizing layer described in the specification of PCT / JP2010 / 001460 is a thin film having a thickness of 7 ⁇ m or less made of a PVA resin in which a dichroic material is oriented, which is integrally formed on a resin base material.
  • the high-functional polarizing layer has optical properties such that the single transmittance is 42.0% or more and the degree of polarization is 99.95% or more.
  • the thin high-performance polarizing layer generates a PVA-based resin layer by applying and drying a PVA-based resin on a resin substrate having a thickness of at least 20 ⁇ m, and the generated PVA-based resin layer is used as a dichroic dyeing solution. So that the dichroic substance is adsorbed on the PVA resin layer, and the PVA resin layer on which the dichroic substance is adsorbed is integrated with the resin base material in the boric acid aqueous solution so that the total draw ratio is the original length. It can manufacture by extending
  • a method for producing a laminate film including a thin high-functional polarizing layer in which a dichroic substance is oriented and includes a resin base material having a thickness of at least 20 ⁇ m and a PVA resin on one side of the resin base material.
  • the said laminated body containing the process of producing
  • the polarizing film with the pressure-sensitive adhesive layer is a continuous web polarizing layer made of a PVA resin in which a dichroic substance is oriented as a polarizer having a thickness of 12 ⁇ m or less, What was obtained by extending
  • stretching can be used.
  • the thermoplastic resin substrate is preferably an amorphous ester thermoplastic resin substrate or a crystalline ester thermoplastic resin substrate.
  • the thin polarizing layer in the above-mentioned Japanese Patent Application Nos. 2010-269002 and 2010-263692 is a continuous web polarizing layer made of a PVA resin in which a dichroic material is oriented, and is amorphous.
  • the laminate including the PVA-based resin layer formed on the ester-based thermoplastic resin base material was stretched in a two-stage stretching process consisting of air-assisted stretching and boric acid-water stretching, so that the thickness was 12 ⁇ m or less. Is.
  • Such a thin polarizing layer has P> ⁇ (10 0.929T ⁇ 42.4 ⁇ 1) ⁇ 100 (where T ⁇ 42.3) and P ⁇ when the single transmittance is T and the polarization degree is P. It is preferable that the optical properties satisfy 99.9 (where T ⁇ 42.3).
  • the thin polarizing layer is a stretched intermediate layer formed of an oriented PVA resin layer by high-temperature stretching in the air with respect to a PVA resin layer formed on an amorphous ester thermoplastic resin substrate of a continuous web.
  • a colored intermediate product comprising a PVA-based resin layer in which a dichroic material (preferably iodine or a mixture of iodine and an organic dye) is oriented by adsorption of the dichroic material to the stretched intermediate product and a step of generating the product.
  • a thin polarizing layer comprising: a step of producing a product; and a step of producing a polarizing layer having a thickness of 12 ⁇ m or less comprising a PVA resin layer in which a dichroic substance is oriented by stretching in a boric acid solution with respect to a colored intermediate product It can manufacture with the manufacturing method of.
  • the total draw ratio of the PVA resin layer formed on the amorphous ester thermoplastic resin base material by high-temperature drawing in air and drawing in boric acid solution should be 5 times or more. desirable.
  • stretching can be 60 degreeC or more.
  • the colored intermediate product is added to the aqueous boric acid solution whose liquid temperature does not exceed 40 ° C. It is desirable to do so by dipping.
  • the amorphous ester-based thermoplastic resin base material is amorphous polyethylene containing copolymerized polyethylene terephthalate copolymerized with isophthalic acid, copolymerized polyethylene terephthalate copolymerized with cyclohexanedimethanol, or other copolymerized polyethylene terephthalate. It can be terephthalate and is preferably made of a transparent resin, and the thickness thereof can be 7 times or more the thickness of the PVA resin layer to be formed.
  • the draw ratio of high-temperature drawing in the air is preferably 3.5 times or less, and the drawing temperature of high-temperature drawing in the air is preferably not less than the glass transition temperature of the PVA resin, specifically in the range of 95 ° C to 150 ° C.
  • the total stretching ratio of the PVA resin layer formed on the amorphous ester thermoplastic resin base material is preferably 5 to 7.5 times .
  • the total stretching ratio of the PVA-based resin layer formed on the amorphous ester-based thermoplastic resin base material is 5 times or more and 8.5 times or less. Is preferred. More specifically, a thin polarizing layer can be produced by the following method.
  • a base material for a continuous web of isophthalic acid copolymerized polyethylene terephthalate (amorphous PET) in which 6 mol% of isophthalic acid is copolymerized is prepared.
  • the glass transition temperature of amorphous PET is 75 ° C.
  • a laminate comprising a continuous web of amorphous PET substrate and a polyvinyl alcohol (PVA) layer is prepared as follows. Incidentally, the glass transition temperature of PVA is 80 ° C.
  • a 200 ⁇ m-thick amorphous PET base material and a 4-5% PVA aqueous solution in which PVA powder having a polymerization degree of 1000 or more and a saponification degree of 99% or more are dissolved in water are prepared.
  • an aqueous PVA solution is applied to a 200 ⁇ m thick amorphous PET substrate and dried at a temperature of 50 to 60 ° C. to obtain a laminate in which a 7 ⁇ m thick PVA layer is formed on the amorphous PET substrate. .
  • a thin and highly functional polarizing layer having a thickness of 3 ⁇ m is produced from the laminate including the PVA layer having a thickness of 7 ⁇ m through the following steps including a two-step stretching process of air-assisted stretching and boric acid water stretching.
  • the laminate including the 7 ⁇ m-thick PVA layer is integrally stretched with the amorphous PET substrate to produce a stretched laminate including the 5 ⁇ m-thick PVA layer.
  • a laminate including a 7 ⁇ m-thick PVA layer is subjected to a stretching apparatus disposed in an oven set to a stretching temperature environment of 130 ° C. so that the stretching ratio is 1.8 times. Are stretched uniaxially at the free end.
  • the PVA layer contained in the stretched laminate is changed to a 5 ⁇ m thick PVA layer in which PVA molecules are oriented.
  • this colored laminate has a single layer transmittance of the PVA layer constituting the high-performance polarizing layer that is finally produced by using the stretched laminate in a dye solution containing iodine and potassium iodide at a liquid temperature of 30 ° C.
  • Iodine is adsorbed to the PVA layer contained in the stretched laminate by dipping for an arbitrary period of time so as to be 40 to 44%.
  • the staining solution uses water as a solvent, and an iodine concentration within the range of 0.12 to 0.30% by weight and a potassium iodide concentration within the range of 0.7 to 2.1% by weight.
  • concentration ratio of iodine and potassium iodide is 1 to 7.
  • potassium iodide is required to dissolve iodine in water. More specifically, by immersing the stretched laminate in a dyeing solution having an iodine concentration of 0.30% by weight and a potassium iodide concentration of 2.1% by weight for 60 seconds, iodine is applied to a 5 ⁇ m-thick PVA layer in which PVA molecules are oriented. A colored laminate is adsorbed on the substrate.
  • the colored laminate is further stretched integrally with the amorphous PET base material by the second-stage boric acid underwater stretching step to produce an optical film laminate including a PVA layer constituting a highly functional polarizing layer having a thickness of 3 ⁇ m.
  • the optical film laminate is subjected to stretching by applying the colored laminate to a stretching apparatus provided in a treatment apparatus set to a boric acid aqueous solution having a liquid temperature range of 60 to 85 ° C. containing boric acid and potassium iodide. It is stretched uniaxially at the free end so that the magnification is 3.3 times. More specifically, the liquid temperature of the boric acid aqueous solution is 65 ° C.
  • the colored laminate having an adjusted iodine adsorption amount is first immersed in an aqueous boric acid solution for 5 to 10 seconds. After that, the colored laminate is passed as it is between a plurality of sets of rolls with different peripheral speeds, which is a stretching apparatus installed in the processing apparatus, and the stretching ratio can be freely increased to 3.3 times over 30 to 90 seconds. Stretch uniaxially.
  • the PVA layer contained in the colored laminate is changed into a PVA layer having a thickness of 3 ⁇ m in which the adsorbed iodine is oriented higher in one direction as a polyiodine ion complex.
  • This PVA layer constitutes a highly functional polarizing layer of the optical film laminate.
  • the optical film laminate was removed from the boric acid aqueous solution and adhered to the surface of the 3 ⁇ m-thick PVA layer formed on the amorphous PET substrate by the washing step. It is preferable to wash boric acid with an aqueous potassium iodide solution. Thereafter, the washed optical film laminate is dried by a drying process using hot air at 60 ° C.
  • the cleaning process is a process for eliminating appearance defects such as boric acid precipitation.
  • an adhesive is applied to the surface of a 3 ⁇ m-thick PVA layer formed on an amorphous PET substrate by a bonding and / or transfer process.
  • the amorphous PET substrate was peeled off, and a 3 ⁇ m thick PVA layer was formed with a (meth) acryl having a lactone ring structure having a thickness of 40 ⁇ m. It can also be transferred to a resin film.
  • the method for producing the thin polarizing layer may include other steps in addition to the above steps. Examples of other steps include an insolubilization step, a crosslinking step, and a drying (adjustment of moisture content) step. The other steps can be performed at any appropriate timing.
  • the insolubilization step is typically performed by immersing the PVA resin layer in a boric acid aqueous solution. By performing the insolubilization treatment, water resistance can be imparted to the PVA resin layer.
  • the concentration of the boric acid aqueous solution is preferably 1 to 4 parts by weight with respect to 100 parts by weight of water.
  • the liquid temperature of the insolubilizing bath (boric acid aqueous solution) is preferably 20 ° C.
  • the insolubilization step is performed after the laminate is manufactured and before the dyeing step and the underwater stretching step.
  • the crosslinking step is typically performed by immersing the PVA resin layer in an aqueous boric acid solution.
  • the concentration of the boric acid aqueous solution is preferably 1 to 4 parts by weight with respect to 100 parts by weight of water.
  • blend iodide it is preferable to mix
  • the blending amount of iodide is preferably 1 to 5 parts by weight with respect to 100 parts by weight of water. Specific examples of the iodide are as described above.
  • the liquid temperature of the crosslinking bath is preferably 20 ° C. to 50 ° C.
  • the crosslinking step is performed before the second boric acid aqueous drawing step.
  • the dyeing step, the crosslinking step, and the second boric acid aqueous drawing step are performed in this order.
  • 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.
  • One or more kinds of arbitrary appropriate additives may be contained in the transparent protective film.
  • the additive examples include an ultraviolet absorber, an antioxidant, a lubricant, a plasticizer, a mold release agent, an anti-coloring agent, 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.
  • a transparent protective film is bonded to one side of the polarizer by an adhesive layer.
  • An adhesive is used for the adhesion treatment between the polarizer and the transparent protective film.
  • the adhesive include isocyanate adhesives, polyvinyl alcohol adhesives, gelatin adhesives, vinyl latexes, and water-based polyesters.
  • the adhesive is usually used as an adhesive made of an aqueous solution, and usually contains 0.5 to 60% by weight of a solid content.
  • examples of the adhesive between the polarizer and the transparent protective film include an ultraviolet curable adhesive and an electron beam curable adhesive.
  • the electron beam curable polarizing film adhesive exhibits suitable adhesiveness to the various transparent protective films.
  • the adhesive used in the present invention can contain a metal compound filler.
  • the polarizing film can be laminated with other optical films.
  • other optical films include the formation of liquid crystal display devices such as reflectors, anti-transmission plates, retardation films (including wavelength plates such as 1/2 and 1/4), visual compensation films, and brightness enhancement films.
  • the thing used as the optical layer which may be used is mentioned. These can be laminated on the polarizing film for practical use, and one layer or two or more layers can be used.
  • An optical film obtained by laminating the optical layer on a polarizing film can be formed by a method of laminating separately sequentially 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 a target retardation characteristic or the like.
  • the polarizing film with the pressure-sensitive adhesive layer of the present invention comprises a degree of polarization (B) after storage for 500 hours in a humidified environment of 60 ° C./90% RH and a degree of polarization (A) before storage in the humidified environment.
  • the change amount (AB) is preferably within 0.05, more preferably within 0.04, and even more preferably within 0.03.
  • the polarizing 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, the liquid crystal display device is generally formed by appropriately assembling components such as a display panel such as a liquid crystal cell, a polarizing film with an adhesive layer, and an illumination system as required, and incorporating a drive circuit.
  • a display panel such as a liquid crystal cell
  • a polarizing film with an adhesive layer such as a liquid crystal cell
  • an illumination system as required
  • As the liquid crystal cell an arbitrary type such as an arbitrary type such as a TN type, STN type, ⁇ type, VA type, or IPS type can be used.
  • liquid crystal display devices such as a liquid crystal display device in which a polarizing film with an adhesive layer is disposed on one or both sides of a display panel such as a liquid crystal cell, or a lighting system using a backlight or a reflecting plate can be formed.
  • the polarizing film with an adhesive layer by this invention can be installed in the one side or both sides of display panels, such as a liquid crystal cell.
  • optical films are provided on both sides, they may be the same or different.
  • a liquid crystal display device for example, a single layer or a suitable layer such as a diffusion layer, an antiglare layer, an antireflection film, a protective plate, a prism array, a lens array sheet, a light diffusion sheet, a backlight, etc. Two or more layers can be arranged.
  • ⁇ Preparation of polarizing film> (Production of polarizer)
  • 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
  • a liquid temperature of 30 ° C. cleaning treatment
  • 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
  • the temperature of the liquid in the flask was kept at around 60 ° C., and a polymerization reaction was carried out for 7 hours. Then, ethyl acetate was added to the obtained reaction liquid, and the solution of the acrylic polymer (A1) with a weight average molecular weight of 1.4 million adjusted to solid content concentration 30% was prepared.
  • Example 1 Preparation of adhesive composition
  • 1 part of lithium bis (trifluoromethanesulfonyl) imide manufactured by Mitsubishi Materials Electronic Chemicals
  • A1 solution 1 part of lithium bis (trifluoromethanesulfonyl) imide (manufactured by Mitsubishi Materials Electronic Chemicals) is blended with 100 parts of the solid content of the resulting acrylic polymer (A1) solution, and trimethylolpropane hexamethylene diisocyanate ( Mitsui Chemicals, trade name “Takenate D-160N”) 0.17 parts, dibenzoyl peroxide 0.25 parts, silane coupling agent (Shin-Etsu Chemical Co., trade name “X-41-1810”) 0
  • An acrylic pressure-sensitive adhesive solution was prepared by blending 2 parts by weight and 0.2 part by weight of an acetoacetyl group-containing silane coupling agent (trade name “A-100” manufactured by Soken Chemical Co., Ltd.).
  • the acrylic pressure-sensitive adhesive solution is uniformly applied to the surface of a polyethylene terephthalate film (separator film) treated with a silicone-based release agent with a fountain coater and dried in an air circulation type thermostatic oven at 155 ° C. for 1 minute. Then, an adhesive layer having a thickness of 20 ⁇ m was formed on the surface of the separator film. Next, the pressure-sensitive adhesive layer formed on the separator film was transferred to the polarizing layer side of the polarizer of the thin polarizing film prepared above, to prepare a polarizing film with a pressure-sensitive adhesive layer.
  • Example 2 Comparative Examples 1 to 4
  • a polarizing film with a pressure-sensitive adhesive layer was produced in the same manner as in Example 1 except that, in preparing the pressure-sensitive adhesive composition, the type or amount of each component was changed as shown in Table 1. .
  • ⁇ Measurement of change in polarization degree> The separator film of the polarizing film with the pressure-sensitive adhesive layer was peeled off and adhered to a micro slide glass (manufactured by Matsunami Glass Co., Ltd., trade name “S200”) using a laminator. Subsequently, the autoclave process was performed for 15 minutes at 50 degreeC and 0.5 MPa, and the said polarizing film with an adhesive layer was completely stuck to the acrylic-free glass. Subsequently, it was stored for 500 hours in a humidified environment of 60 ° C./90% RH. The polarization degree of the polarizing film before storage and after storage was measured using V7100 manufactured by JASCO Corporation.
  • the amount of change in the degree of polarization was calculated by the following formula and evaluated according to the following criteria.
  • Amount of change ⁇ P (degree of polarization before storage) ⁇ (degree of polarization after storage) (Evaluation criteria) A: 0 ⁇ ⁇ P ⁇ 0.02 A: 0.02 ⁇ ⁇ P ⁇ 0.04 ⁇ : 0.04 ⁇ ⁇ P ⁇ 0.05 ⁇ : 0.05 ⁇ ⁇ P
  • the haze (%) of the polarizing film with the pressure-sensitive adhesive layer is determined using a haze meter (manufactured by Murakami Color Research Laboratory, HN-150) according to the method defined in JIS 7136. It was measured.
  • the haze of the polarizing film with the pressure-sensitive adhesive layer is preferably 3% or less, more preferably 1% or less.
  • the polarizing film with a pressure-sensitive adhesive layer of the present invention is used for 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.

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  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Organic Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Inorganic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Theoretical Computer Science (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Polarising Elements (AREA)
  • Liquid Crystal (AREA)
  • Adhesive Tapes (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

L'invention a pour objet de fournir un film polarisant avec couche d'adhésif qui présente une fonction de prévention de charge électrostatique ainsi qu'un degré de polarisation peu susceptibles de diminuer y compris dans le cas d'une exposition à un environnement humide, et qui est doté d'une excellente transparence. Plus précisément, l'invention concerne un film polarisant avec couche d'adhésif qui possède un film polarisant et une couche d'adhésif agencée sur ce film polarisant. Le film polarisant avec couche d'adhésif de l'invention est caractéristique en ce que ledit film polarisant possède un film protecteur transparent uniquement d'un côté d'un polariseur, et ladite couche d'adhésif est agencée sur le polariseur du côté dépourvu dudit film protecteur transparent, et est formée à partir d'une composition d'adhésif comprenant un polymère (méth)acrylique et un sel de métal alcalin. Ledit polymère (méth)acrylique comprend un monomère (1) possédant un atome d'azote et une double liaison carbone-carbone, en tant qu'unité monomère.
PCT/JP2018/011430 2017-03-27 2018-03-22 Film polarisant avec couche d'adhésif, et dispositif d'affichage d'image WO2018180895A1 (fr)

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CN201880015396.3A CN110383120B (zh) 2017-03-27 2018-03-22 带粘合剂层的偏振膜及图像显示装置

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JP7372824B2 (ja) 2018-11-29 2023-11-01 日東電工株式会社 粘着剤層付き偏光フィルム及び画像表示装置
JP7343316B2 (ja) * 2018-12-17 2023-09-12 日東電工株式会社 ベゼル付き画像表示パネル、画像表示装置および粘着剤層付き光学フィルム
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TW201903090A (zh) 2019-01-16
JP2018163302A (ja) 2018-10-18
KR102405461B1 (ko) 2022-06-08
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