WO2013055158A4 - Adhésif pour une plaque de polarisation et plaque de polarisation le comprenant - Google Patents

Adhésif pour une plaque de polarisation et plaque de polarisation le comprenant Download PDF

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Publication number
WO2013055158A4
WO2013055158A4 PCT/KR2012/008333 KR2012008333W WO2013055158A4 WO 2013055158 A4 WO2013055158 A4 WO 2013055158A4 KR 2012008333 W KR2012008333 W KR 2012008333W WO 2013055158 A4 WO2013055158 A4 WO 2013055158A4
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WIPO (PCT)
Prior art keywords
weight
parts
polarizing plate
adhesive composition
group
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PCT/KR2012/008333
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English (en)
Korean (ko)
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WO2013055158A2 (fr
WO2013055158A3 (fr
Inventor
서은미
허은수
이남정
심화섭
나균일
박준욱
민지현
임이랑
Original Assignee
주식회사 엘지화학
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Application filed by 주식회사 엘지화학 filed Critical 주식회사 엘지화학
Priority to JP2013541937A priority Critical patent/JP6066211B2/ja
Priority to CN201280009387.6A priority patent/CN103415584B/zh
Priority to US13/824,199 priority patent/US9487685B2/en
Priority claimed from KR1020120113305A external-priority patent/KR101378817B1/ko
Publication of WO2013055158A2 publication Critical patent/WO2013055158A2/fr
Publication of WO2013055158A3 publication Critical patent/WO2013055158A3/fr
Publication of WO2013055158A4 publication Critical patent/WO2013055158A4/fr

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
    • 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
    • C09J163/00—Adhesives based on epoxy resins; Adhesives based on derivatives of epoxy resins

Definitions

  • the present invention relates to a polarizing plate adhesive used for attaching a protective film or a compensation film to a polarizer, and a polarizing plate using the adhesive, and more particularly to a non-aqueous adhesive for a polarizing plate excellent in adhesion, water resistance and heat resistance, and a polarizing plate will be.
  • a liquid crystal display device has been used in various display devices with low power consumption, low voltage operation, light weight and thin features.
  • the liquid crystal display device is made up of many materials such as a liquid crystal cell, a polarizing plate, a phase difference film, a light condensing sheet, a diffusion film, a light guide plate, and a light reflection sheet. Therefore, improvements have been actively made aiming at productivity, light weight, and brightness improvement by reducing the number of constituent films or decreasing the thickness of a film or a sheet.
  • the polarizing plate has been used as a structure in which a protective film is laminated on one or both sides of a polarizer made of polyvinyl alcohol (PVA) resin dyed with a dichroic dye or iodine.
  • PVA polyvinyl alcohol
  • TAC triacetyl cellulose
  • a TAC film has been mainly used as a polarizer protective film.
  • TAC film has a problem that it is easily deformed in a high temperature and high humidity environment.
  • protective films of various materials capable of replacing TAC films have been developed.
  • protective films such as polyethylene terephthalate (PET), cycloolefin polymer (COP) Or a mixture thereof.
  • an acrylic adhesive an adhesive for a dry laminate in which a urethane resin solution and a polyisocyanate resin solution are mixed, a styrene butadiene rubber adhesive, an epoxy adhesive, a polyvinyl alcohol adhesive , Urethane-based adhesives, adhesives containing a polyester-based ionomer-type urethane resin and a compound having a glycidyloxy group, thermosetting adhesives, and the like are known.
  • water-based adhesives comprising an aqueous solution of a polyvinyl alcohol- Sieve is mainly used.
  • the adhesive strength is weak, so that the use thereof is limited depending on the film material.
  • the material of the protective film applied to both surfaces of the PVA element is different, a problem of curling of the polarizer due to the drying process of the water- Problems such as lowering of physical properties occur. Therefore, a non-aqueous adhesive has been developed as an alternative to solve this problem.
  • the thickness of the final adhesive layer tends to be thicker than that of the water-based adhesive.
  • the thickness of the adhesive layer is increased, defects such as wrinkles are generated in the TD and MD directions of the outer surface of the polarizing plate, so that the thickness of the adhesive layer is preferably small.
  • a method of lowering the content of the oligomer contained in the adhesive and adding a monofunctional monomer may be considered.
  • the glass transition temperature of the adhesive is lowered and heat resistance and water resistance are weakened .
  • the glass transition temperature of the adhesive is lower than the glass transition temperature of the polarizer, defects such as cracking of the polarizer may occur.
  • a method of adding a monomer having a high glass transition temperature of a polyfunctional monomer or a homopolymer may be considered, but in this case, there is a problem that the adhesive strength is lowered.
  • an object of the present invention is to provide an adhesive for a polarizing plate having excellent adhesive strength, water resistance and heat resistance and a polarizing plate containing the same.
  • an epoxy resin composition comprising: 100 parts by weight of a first epoxy compound having a glass transition temperature of 120 ° C or higher; 30 to 100 parts by weight of a second epoxy compound having a glass transition temperature of 60 ⁇ ⁇ or less of the homopolymer; And 0.5 to 20 parts by weight of a cationic photopolymerization initiator.
  • the present invention provides a polarizing plate comprising a polarizer, an adhesive layer formed on at least one side of the polarizer, and a transparent base film formed on the adhesive layer, wherein the adhesive layer is formed by the adhesive for a polarizing plate And a polarizing plate.
  • a primer layer may be further disposed between the adhesive layer and the transparent base film.
  • the polarizer of the present invention has a viscosity of 50 cP or less and a glass transition temperature of 80 ⁇ or higher, which is excellent in endurance reliability.
  • the present invention provides an optical element comprising the above-mentioned polarizing plate of the present invention.
  • the adhesive composition of the present invention has excellent adhesiveness to films of various materials, particularly acrylic films, and has a relatively low viscosity, so that the thickness of the adhesive layer can be reduced to 10 ⁇ m or less.
  • the polarizing plate produced using the adhesive composition of the present invention is excellent in water resistance and heat resistance.
  • the inventors of the present invention have conducted intensive research on a method for lowering the viscosity of a non-aqueous adhesive agent without lowering the adhesive force, water resistance, and heat resistance, and found that two epoxy compounds The present inventors have found that the viscosity of the composition can be kept low while keeping the glass transition temperature of the entire composition at a high level.
  • the adhesive for a polarizing plate of the present invention comprises (1) 100 parts by weight of a first epoxy compound having a glass transition temperature of 120 DEG C or higher of a homopolymer, (2) a second epoxy compound having a glass transition temperature of 60 DEG C or lower 30 to 100 parts by weight, and (3) 0.5 to 20 parts by weight of a photo cationic polymerization initiator.
  • a homopolymer having a low glass transition temperature plays an important role in adhesion and viscosity, and when a homopolymer having a high glass transition temperature is used together, the glass transition temperature is lowered It is advantageous in thermal shock resistance.
  • the epoxy compound means a compound having at least one epoxy group in the molecule, preferably a compound having at least two epoxy groups in the molecule, and may be in the form of a monomer, a polymer or a resin ≪ / RTI > Preferably, the epoxy compound of the present invention may be in the form of a resin.
  • the first epoxy compound can be used without particular limitation as long as it is an epoxy compound having a glass transition temperature of 120 ⁇ or higher.
  • an alicyclic epoxy compound having a glass transition temperature of 120 ⁇ or higher and / or an aromatic epoxy May be used as the first epoxy compound of the present invention.
  • Specific examples of the epoxy compound having a glass transition temperature of 120 ° C or higher of the homopolymer include 3,4-epoxycyclohexylmethyl-3,4'-epoxycyclohexanecarboxylate, vinylcyclohexene dioxide dicyclopentadiene dioxide, bis epoxycyclo Pentyl ether, bisphenol A-based epoxy compounds, and bisphenol F-based epoxy compounds. It is more preferable that the glass transition temperature of the homopolymer of the first epoxy compound is about 120 ° C to 200 ° C.
  • the second epoxy compound can be used without any particular limitation, as long as the epoxy compound having a glass transition temperature of 60 ⁇ or lower of the homopolymer.
  • the second epoxy compound may be an alicyclic epoxy compound, an aliphatic epoxy compound, or the like.
  • alicyclic epoxy compound a bifunctional epoxy compound, that is, a compound having two epoxy groups is preferably used, and it is more preferable to use a compound in which the two epoxy groups are alicyclic epoxy groups. But is not limited to.
  • an epoxy compound having an aliphatic epoxy group which is not an alicyclic epoxy group can be exemplified.
  • polyglycidyl ethers of aliphatic polyhydric alcohols polyglycidyl ethers of alkylene oxide adducts of aliphatic polyhydric alcohols; Polyglycidyl ethers of polyester polyols of aliphatic polyhydric alcohols and aliphatic polyvalent carboxylic acids; Polyglycidyl ethers of aliphatic polyvalent carboxylic acids; Polyglycidyl ethers of polyester polycarboxylic acids of aliphatic polyhydric alcohols and aliphatic polyvalent carboxylic acids; Dimers, oligomers or polymers obtained by vinyl polymerization of glycidyl acrylate or glycidyl methacrylate; Or an oligomer or polymer obtained by vinyl polymerization of glycidyl acrylate or gly
  • aliphatic polyhydric alcohols examples include, for example, aliphatic polyhydric alcohols having 2 to 20 carbon atoms, 2 to 16 carbon atoms, 2 to 12 carbon atoms, 2 to 8 carbon atoms, or 2 to 4 carbon atoms, Ethylene glycol, 1,2-propanediol, 1,3-propanediol, 2-methyl-1,3-propanediol, 2-butyl- Pentanediol, 3-methyl-2,4-pentanediol, 2,4-pentanediol, 1,5-pentanediol, Pentanediol, 1,6-hexanediol, 1,7-heptanediol, 3,5-heptanediol, 1,8-octanediol, 2-methyl- Aliphatic diols such as octanediol, 1,9-nonanediol, and
  • alkylene oxides examples include alkylene oxides having 1 to 20 carbon atoms, 1 to 16 carbon atoms, 1 to 12 carbon atoms, 1 to 8 carbon atoms and 1 to 4 carbon atoms such as ethylene oxide Seed, propylene oxide, or butylene oxide may be used.
  • aliphatic polycarboxylic acid examples include aliphatic polycarboxylic acids such as oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, dodecanedioic acid, , 2-methyladipic acid, 3-methyladipic acid, 3-methylpentanedioic acid, 2-methyloctanedioic acid, 3,8-dimethyldecanedioic acid, 3,7-dimethyldecanedioic acid, Dicarboxylic acid, 1,2-cyclopentanedicarboxylic acid, 1,3-cyclopentanedicarboxylic acid, 1,2-cyclohexanedicarboxylic acid, 1,3-cyclohexanedicarboxylic acid, 1 , 4-cyclohexanedicarboxylic acid, 1,4-dicarboxylmethylene cyclohex
  • the second epoxy compound of the present invention may contain at least one glycidyl ether group, and examples thereof include 1,4-cyclohexanedimethanol diglycidyl ether, 1,4-butanediol di Hexyldiol diglycidyl ether, neopentyldiglycidyl ether, resorcinol diglycidyl ether, diethylene glycol di glycidyl ether, ethylene glycol di glycidyl ether, 1,6-hexanediol diglycidyl ether, One selected from the group consisting of trimethylolpropane triglycidyl ether, n-butyl glycidyl ether, 2-ethylhexyl glycidyl ether, phenyl glycidyl ether, and o-cresyl glycidyl ether. Or more can be used as the second epoxy compound of the present
  • the second epoxy compound preferably has a glass transition temperature of the homopolymer of about 0 ⁇ to 60 ⁇
  • the present invention it is preferable to use a combination of a first epoxy compound containing at least one epoxidized aliphatic cyclic group and a second epoxy compound containing at least one glycidyl ether group as the epoxy compound Particularly preferred.
  • a combination of the first epoxy compound and the second epoxy compound it has been found that not only the low viscosity and the adhesive strength are satisfied but also the thermal shock property of the polarizing plate is improved.
  • the second epoxy compound is preferably contained in an amount of 30 to 100 parts by weight based on 100 parts by weight of the first epoxy compound. If the content of the second epoxy compound exceeds 100 parts by weight, the glass transition temperature of the entire adhesive composition is lowered to lower the heat resistance. If the content is less than 30 parts by weight, the adhesive strength may be lowered.
  • the weight ratio of the first epoxy compound and the second epoxy compound is about 1: 1 to about 3: 1, more preferably about 1: 1 to 2: , And most preferably, the first epoxy compound and the second epoxy compound are mixed at a weight ratio of 1: 1.
  • the weight ratio of the first epoxy compound and the second epoxy compound is in the above range, the most preferable physical properties in terms of the glass transition temperature and the adhesion can be obtained.
  • the cationic photopolymerization initiator is a compound which produces a cationic species or Lewis acid by irradiation with an active energy ray.
  • the cationic photopolymerization initiator include onium salts such as aromatic diazonium salts, aromatic iodine aluminum salts and aromatic sulfonium salts, Iron-arene complex, and the like, but the present invention is not limited thereto.
  • the content of the cationic photopolymerization initiator is about 0.5 to 20 parts by weight, preferably about 0.5 to 15 parts by weight, more preferably about 0.5 to 10 parts by weight based on 100 parts by weight of the first epoxy compound .
  • the adhesive for a polarizing plate of the present invention may further comprise 100 to 400 parts by weight of an oxetane compound having at least one oxetanyl group in the molecule, if necessary.
  • an oxetane compound having at least one oxetanyl group in the molecule, if necessary.
  • the viscosity of the adhesive can be lowered to make the adhesive layer thinner.
  • the oxetane compound is not particularly limited as long as it has at least one oxetanyl group in the molecule, and various oxetane compounds well known in the art can be used.
  • the oxetane compound of the present invention include 3-ethyl-3 - [(3-ethyloxetan-3-yl) methoxymethyl] oxetane, 1,4-bis [ 3-yl) methoxymethyl] benzene, 1,4-bis [(3-ethyloxetane-3-yl) methoxy] benzene, 1,3- ) Methoxy] benzene, 1,2-bis [(3-ethyloxetan-3-yl) methoxy] benzene, 4,4'- Phenyl, 3,3 ', 5,5'-tetramethyl-4,4'-bis [3-ethyloxetane-3-yl] 3-yl) methoxy] naphthalen
  • the adhesive composition for a polarizing plate of the present invention may further comprise a vinyl compound, if necessary, together with the above components.
  • a vinyl compound When a vinyl compound is added, low viscosity can be maintained, and the phenomenon that the glass transition temperature of the adhesive layer after curing is lowered can be reduced.
  • hydroxy C 1-6 alkyl vinyl ether and / or vinyl acetate may be used, and the hydroxy C 1-6 alkyl vinyl ether may be hydroxyethyl vinyl ether, Cyclohexanedimethanol vinyl ether, 4-cyclohexanedimethanol vinyl ether, 4- (hydroxymethyl) cyclohexylmethyl vinyl ether, ethylene glycol vinyl ether, and diethylene glycol monovinyl ether. have.
  • the vinyl compound may be contained in an amount of 0.1 to 10 parts by weight, or 0.1 to 5 parts by weight based on 100 parts by weight of the total adhesive composition.
  • the adhesive composition for a polarizing plate of the present invention may further comprise a silane coupling agent, if necessary, together with the above components.
  • a silane coupling agent when included, the silane coupling agent lowers the surface energy of the adhesive to improve the adhesive wetting.
  • the silane coupling agent preferably contains a cationic polymerizable functional group such as an epoxy group, a vinyl group, and a radical group.
  • a silane coupling agent containing a cationic polymerizable functional group is used, unlike the case of using a silane coupling agent not containing a surfactant or a cationic polymerizable functional group, the wettability Can be improved. This is considered to be because the cationic polymerizable functional group of the silane coupling agent reacts with the silane group of the adhesive composition to form a crosslinked structure, thereby reducing the lowering of the glass transition temperature of the adhesive layer after curing.
  • the silane coupling agent usable in the present invention is not limited thereto, but may be, for example, a silane coupling agent represented by the following formula (1).
  • R 1 represents a cationic polymerizable functional group bonded to a silicon atom, which is a functional group containing a cyclic ether group or a vinyloxy group
  • R 2 represents a hydrogen atom, a hydroxyl group, an alkyl group or a group bonded to a silicon atom, An alkoxy group
  • n is an integer of 1 to 4.
  • silane coupling agent satisfying the above formula (1) examples include 2- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, 3-glycidoxypropyltrimethoxysilane, glycidoxypropylmethyl di But are not limited to, methoxy silane, glycidoxy propyl triethoxy, vinyl trimethoxy silane, or vinyl triethoxy silane.
  • silane coupling agent usable in the present invention an oligomer type silane compound in which the above-mentioned cationic polymerizable functional group is introduced into the molecule of the siloxane oligomer may be used.
  • the siloxane oligomer may be a relatively low molecular weight silicone resin in which the terminal of the molecular chain is blocked with an alkoxysilyl group.
  • the adhesive composition of the present invention may contain 0.1 to 10 parts by weight, or 0.1 to 5 parts by weight of the silane compound per 100 parts by weight of the total adhesive composition. Within this range, the adhesive layer can exhibit adequate surface energy and adhesion.
  • the cationic adhesive composition of the present invention may further comprise a radically polymerizable monomer, if necessary.
  • the radically polymerizable monomer include various compounds as radical curable components, and the (meth) acrylic functional group includes at least one of (meth) acrylates, (meth) acrylamides (Meth) acryloylmorpholine, N-vinyl-2-pyrrolidone, triallyl isocyanurate, and the like can be used. have.
  • (meth) acrylates having one (meth) acryloyl group in the molecule include methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, isopropyl (meth) Acrylates such as butyl (meth) acrylate, isobutyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, octyl (meth) acrylate, isooctyl (Meth) acrylate, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, cyclohexyl (Meth) acrylate, dicyclopentenyl (meth) acrylate, dicyclopentenyloxyethyl (meth) acrylate, dicyclopentenyl (meth) acrylate, (Meth) acrylate, (Met
  • (meth) acrylamides include (meth) acrylamide, N, N-dimethyl (meth) acrylamide, N, N-diethyl (meth) acrylamide, N- (Meth) acrylamide, N, N-diallyl (meth) acrylamide, N, N-dimethylaminopropyl (meth) acrylamide, methylenebis have.
  • maleimide examples include N-methylmaleimide, N-hydroxyethylmaleimide, N-hydroxyethyl citraconimide, urethane acrylate of N-hydroxyethyl citraconimide and isophorone diisocyanate, and the like .
  • the (meth) acrylates having two (meth) acryloyl groups in the molecule include 1,3-butanediol di (meth) acrylate, 1,6-hexane diol (meth) Butanediol di (meth) acrylate, 2-methacryloyloxyethyl acrylate, ethylenebis (meth) acrylate, 2-methacryloyloxyethyl acrylate, Acrylate, diethylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, triethylene glycol di (meth) acrylate, neopentyl glycol di Acrylate, polyethylene glycol di (meth) acrylate, polyethylene glycol (di) (meth) acrylate, polyethylene glycol di (meth) acrylate, tetraethylene glycol di (meth) acrylate, cyclohexanedimethanol di Polyethylene glue (400) di (meth)
  • the (meth) acrylates having three (meth) acryloyl groups in the molecule include trimethylolpropane tri (meth) acrylate, trimethylolpropane tri (meth) acrylate, trimethylolpropane tri (2-hydroxyethyl) isocyanurate triacrylate, tri (2-hydroxyethyl) isocyanurate, tri (meth) acrylate, Acrylate, pentaerythritol triacrylate, ethoxylate trimethylolpropane tri (meth) acrylate, and proxylate trimethylolpropane tri (meth) acrylate.
  • (meth) acrylates having 4 or 5 (meth) acryloyl groups in the molecule include pentaerythritol tetra (meth) acrylate, ditrimethylol propranetetra (meth) acrylate, dipentaerythritol penta (Meth) acrylate, epoxylated pentaerythritol tetra (meth) acrylate, and pentaacrylate ester.
  • (meth) acrylates having six meta) acryloyl groups in the molecule include dipentaerythritol hexa (meth) acrylate.
  • the content of the radically polymerizable monomer is about 0 to 40 parts by weight, preferably about 5 to 30 parts by weight, and more preferably about 5 to 25 parts by weight, based on 100 parts by weight of the whole adhesive composition.
  • the adhesive composition contains a radically polymerizable monomer as described above, it is preferable to blend the photo-radical polymerization initiator in order to promote the radical polymerization property and improve the curing rate.
  • the photoradical polymerization initiator include, but are not limited to, an acetophenone-based photopolymerization initiator, a benzoin ether-based photopolymerization initiator, a benzophenone-based photopolymerization initiator, a thioxanthone-based photopolymerization initiator, have.
  • the content of the photo-radical polymerization initiator is about 0.5 to 20 parts by weight, preferably about 0.5 to 15 parts by weight, more preferably about 0.5 to 10 parts by weight, based on 100 parts by weight of the whole adhesive composition.
  • the adhesive composition for a polarizing plate may further include a photosensitizer, an antioxidant, an oligomer, and an adhesion promoter, if necessary, and further include urethane acrylate in an amount of more than 0 and less than 4 parts by weight.
  • urethane acrylate When the urethane acrylate is added as described above, the viscosity tends to increase, but the increased viscosity of the adhesive can be lowered by applying a temperature.
  • the adhesive composition for a polarizing plate of the present invention, to which urethane acrylate is added as described above can impart a more appropriate adhesive force to an acrylic film.
  • the above-mentioned adhesive composition for a polarizing plate of the present invention is excellent in heat resistance after curing at a glass transition temperature of 80 ° C or higher, preferably 80 ° C to 120 ° C.
  • the polarizer produced by using the adhesive composition of the present invention was found to have no polarizer cracking when evaluated at 80 ° C heat durability and thermal shock resistance.
  • the adhesive composition of the present invention has a viscosity of about 15 to 80 cP at 25 ⁇ , preferably about 15 to 50 cP, the adhesive composition has excellent workability and exhibits excellent adhesion at a thin adhesive layer thickness.
  • the polarizing plate of the present invention comprises a polarizer, an adhesive layer formed on at least one side of the polarizer, and a transparent base film formed on the adhesive layer, wherein a primer layer is formed between the adhesive layer and the transparent base film . That is, the polarizing plate of the present invention may have a polarizer / adhesive layer / primer layer / transparent base film / transparent base film / primer layer / adhesive layer / polarizer / adhesive layer / primer layer / transparent base film structure.
  • the polarizer is not particularly limited, and a film made of polyvinyl alcohol (PVA) containing a polarizer well-known in the art, for example, iodine or a dichroic dye, may be used.
  • PVA polyvinyl alcohol
  • the polarizer means a state not including a protective film (transparent base film), and the polarizer means a state including a protective film (transparent base film).
  • the adhesive layer is formed by the above-mentioned adhesive composition for a polarizing plate of the present invention.
  • the details of the adhesive composition for a polarizing plate are the same as those described above, so that a description thereof will be omitted.
  • the thickness of the adhesive layer formed by the adhesive composition for a polarizing plate of the present invention is preferably in the range of more than 0 to 10 ⁇ m or less, preferably 0.1 to 5 ⁇ m or so. When the thickness of the adhesive layer is less than 0.1 mu m, the uniformity and the adhesive force of the adhesive layer may be lowered. If the thickness of the adhesive layer exceeds 10 mu m, the appearance of the polarizer may be wrinkled.
  • the primer layer is formed of a primer composition containing a urethane polymer to improve adhesion between the transparent substrate film and the adhesive layer.
  • the primer composition comprises a urethane polymer, water-dispersible fine particles and water. More specifically, the primer composition comprises 1 to 50 parts by weight of a urethane polymer and 100 to 10 parts by weight of water- Parts by weight and water of the remainder.
  • the urethane polymer is obtained by reacting a polyol and a polyisocyanate.
  • the polyol is not particularly limited as long as it has two or more hydroxyl groups in the molecule, and any appropriate polyol may be employed.
  • the polyol may be a polyester polyol, a polyether polyol, a polycarbonate diol or the like, and at least one selected from the group consisting of these may be used alone or in combination of two or more.
  • the polyol may be selected from the group consisting of ethylene glycol, 1,2-propanediol, 1,3-propanediol, 1,3-butanediol, 1,4-butanediol, neopentyl glycol, pentanediol, 1,6- Diethylene glycol, triethylene glycol, polyethylene glycol, dipropylene glycol, polypropylene, polypropylene, polypropylene, polypropylene, polypropylene, polypropylene, Glycol, 1,4-cyclohexanedimethanol, 1,4-cyclohexanediol, bisphenol A, bisphenol F, glycerin, 1,1,1-trimethylol propane, 1,2,5-hexatriol, It is preferably at least one selected from the group consisting of glucose, glucose, sucrose, and sorbitol.
  • the polyester polyol is typically obtained by reacting a polybasic acid component with a polyol component.
  • the polybasic acid component include ortho-phthalic acid, isophthalic acid, terephthalic acid, 1,4-naphthalene dicarboxylic acid, 2,5-naphthalene dicarboxylic acid, 2,6-naphthalene dicarboxylic acid, Aromatic dicarboxylic acids such as dicarboxylic acid and tetrahydrophthalic acid; Aliphatic dicarboxylic acids such as oxalic acid, succinic acid, malonic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, linoleic acid, maleic acid, fumaric acid, mesaconic acid and itaconic acid; Alicyclic dicarboxylic acids such as hexahydrophthalic acid, tetrahydrophthalic acid, 1,3-
  • the polycarbonate polyol is preferably at least one selected from the group consisting of poly (hexamethylene carbonate) glycol and poly (cyclohexanecarbonate) glycol.
  • the polyether polyol is typically obtained by ring-opening polymerization of an alkylene oxide to a polyhydric alcohol.
  • polyhydric alcohols include ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, glycerin, and trimethylolpropane. These may be used alone or in combination of two or more.
  • the isocyanate is not limited as long as it is a compound having two or more NCO groups, and examples thereof include toluene diisocyanate (TDI), 4,4-diphenylmethane diisocyanate (MDI), 1,5-naphthalene diisocyanate (NDI) (XDI), such as isocyanuric diisocyanate (TODI), hexamethylene diisocyanate (HMDI), isophorone diisocyanate (IPDI), p-phenylenediisocyanate, transcyclohexane, 1,4-diisocyanate and xylene diisocyanate Can be used alone or in combination of two or more.
  • TDI toluene diisocyanate
  • MDI 4,4-diphenylmethane diisocyanate
  • NDI 1,5-naphthalene diisocyanate
  • TODI isocyanuric diisocyanate
  • HMDI hex
  • the urethane resin may be produced by any suitable method known in the art. Specifically, a single shot method in which each component is reacted at a time, and a multi-step method in which the components are reacted stepwise.
  • the urethane resin has a carboxyl group, it is preferably prepared by a multi-stage method, and a carboxyl group can be easily introduced by a multi-stage method.
  • any suitable urethane reaction catalyst can be used in the production of the urethane resin.
  • polyols examples include polyols having three or more hydroxyl groups such as sorbitol, glycerin, trimethylol ethane, trimethylol propane, and pentaerythritol.
  • chain extenders examples include but are not limited to acetylene glycol, diethylene glycol, triethylene glycol, 1,3-propanediol, 1,3-butanediol, 1,4-butanediol, neopentyl glycol, pentanediol, Glycols such as hexanediol, propylene glycol and the like; Aliphatic diamines such as ethylenediamine, propylenediamine, hexamethylenediamine, 1,4-butanediamine and aminoethylenecanolamine; Alicyclic diamines such as isophoronediamine and 4,4'-dicyclohexylmethanediamine; And aromatic diamines such as xylylenediamine and tolylene diamine.
  • acetylene glycol diethylene glycol, triethylene glycol, 1,3-propanediol, 1,3-butanediol, 1,4-butanediol
  • a neutralizing agent can be used in the production of the urethane resin.
  • a neutralizing agent By using a neutralizing agent, the stability of the urethane resin in water can be improved.
  • the neutralizing agent include ammonia N-methylmorpholine, triethylamine, dimethylethanolamine, methyldiethanolamine, triethanolamine, morpholine, tripropylamine, ethanolamine, triisopropanolamine and the like. These may be used alone or in combination of two or more.
  • an organic solvent inert to the polyisocyanate and compatible with water is used.
  • the organic solvent include ester solvents such as ethyl acetate and ethyl cellosolve acetate; Ketone solvents such as acetone, methyl ethyl ketone and methyl isobutyl ketone; And ether solvents such as dioxane tetrahydrofuran. These may be used alone or in combination of two or more.
  • the urethane polymer preferably contains a carboxyl group.
  • the urethane polymer contains a carboxyl group, the water dispersibility is improved, and the adhesion between the adhesive layer and the transparent base film is further improved.
  • the urethane polymer containing the carboxyl group can be obtained, for example, by reacting a chain extender having a free carboxyl group in addition to a polyol and a polyisocyanate.
  • chain extender having a carboxyl group include dihydroxycarboxylic acid, dihydroxysuccinic acid, and the like.
  • Dihydroxycarboxylic acids include, for example, dialkylolalkanoic acids including dimethylolacetic acid, dimethylolbutanoic acid, dimethylolpropionic acid, dimethylolbutyric acid, and dimethylolalkanoic acid such as dimethylolpentanoic acid. These may be used alone or in combination of two or more.
  • the content of the urethane polymer is about 1 to 50 parts by weight, more preferably about 3 to 20 parts by weight, and most preferably about 5 to 15 parts by weight based on 100 parts by weight of the primer composition.
  • the urethane polymer is contained in an amount of less than 1 part by weight based on 100 parts by weight of the primer composition, the adhesiveness is lowered.
  • the amount of the urethane polymer is more than 30 parts by weight, viscosity is increased.
  • the weight average molecular weight of the urethane polymer is preferably from 10,000 to 100,000, and when the molecular weight is less than 10,000, there is a decrease in adhesion, and when the molecular weight is more than 100,000, it is difficult to produce an aqueous dispersion urethane.
  • the water-dispersible microparticles that can be used in the present invention may be any suitable microparticles, preferably water-dispersible microparticles.
  • inorganic fine particles All organic fine particles can be used.
  • the inorganic fine particles include inorganic oxides such as silica, titania, alumina, zirconia and antimony.
  • the organic fine particles include a silicone resin, a fluorine resin, a (meth) acrylic resin, a crosslinked polyvinyl alcohol, and a melamine resin.
  • silica is preferably used, and silica is more excellent in blocking inhibition ability, transparency is excellent, haze is not generated, no coloring is caused, and thus the effect on the optical characteristics of the polarizing plate is smaller. This is because the silica is excellent in dispersibility and dispersion stability with respect to the primer composition and can be more excellent in workability in forming the primer layer.
  • the average diameter (average primary particle diameter) of the water-dispersible fine particles is preferably 10 to 200 nm, more preferably 20 to 70 nm.
  • the average diameter of the water-dispersible fine particles is less than 10 nm, the surface energy is increased, so that the aggregation of the silica occurs in the primer solution and precipitation occurs. As a result, the stability of the solution may become a problem.
  • the average particle diameter is more than 200 nm, When the particles are aggregated because the dispersion is uneven, the size becomes larger than the wavelength of visible light (400 nm-800 nm), so that light of 400 nm or more is scattered and the haze increases.
  • the content of the water-dispersible fine particles is preferably about 0.1 to 10 parts by weight based on 100 parts by weight of the primer composition.
  • the content of the water-dispersible fine particles is less than 0.1 part by weight, slip between the films does not occur during winding and film breakage may occur. If it exceeds 10 parts by weight, haze may occur.
  • the fine particles are preferably formulated as an aqueous dispersion.
  • silica is employed as the fine particles, it is preferably blended as colloidal silica.
  • colloidal silica products commercially available in the technical field can be used as it is. Examples of the colloidal silica include SNOWTEX series manufactured by Nissan Chemical Industries, AEROSIL series manufactured by Air Products, epostar series and soliostar RA series manufactured by Japan Catalyst, Ranco LSH series can be used.
  • the primer composition may further contain a crosslinking agent, if necessary.
  • a crosslinking agent methylol compounds such as oxazoline, boric acid and trimethylolmelamine, carbodiimide, isocyanate, and aziridine compounds can be used.
  • the crosslinking agent is preferably contained in an amount of 0.1 to 30 parts by weight based on 100 parts by weight of the primer composition.
  • the primer layer prevents water penetration, so that the optical properties such as water resistance and anti-wet heat are superior.
  • the content of the crosslinking agent contained in the primer layer may vary depending on the applied surface.
  • the term " double-sided polarizer " means a polarizer in which a transparent base film is attached to both surfaces of a polarizer, and is distinguished from a cross-section type polarizer in which a transparent base film is adhered to only one side. That is, according to the present invention, the double-sided polarizer refers to a polarizer composed of a transparent substrate film / primer layer / adhesive layer / polarizer / adhesive layer / primer layer / transparent substrate film.
  • the active energy ray may be irradiated in both directions of the polarizing plate, or may be irradiated only in one direction.
  • the primer layer formed on the active energy ray irradiated surface and the non-irradiated surface have different crosslinking agent contents. More specifically, it is preferable that the content of the crosslinking agent in the primer layer formed on the non-irradiated surface is higher than the content of the crosslinking agent in the primer layer formed on the irradiated surface.
  • the primer layer may be incorporated into the adhesive layer, resulting in unfavorable adhesion of the adhesive, resulting in deterioration of the adhesive strength, because the adhesive energy hardening speed is slower than the irradiation surface.
  • the primer composition may further contain, if necessary, other additives such as a silane coupling agent, a fluorine-based surfactant, a silane-based surfactant, and a surfactant containing an alkyl group.
  • the primer layer formed by the primer composition as described above preferably has a thickness of about 100 nm to 1 ⁇ .
  • the primer layer is 100 nm or less, the adhesive force is decreased.
  • the primer layer is 1 ⁇ m or more, the primer layer is not dried properly, resulting in blocking between the films.
  • the water contact angle of the surface of the primer layer of the present invention is preferably 40 to 100 degrees, more preferably 50 to 90 degrees, still more preferably 60 to 80 degrees.
  • the hydrophilic property of the primer layer is strong. Therefore, the primer layer reacts with the iodine of the polarizer to inhibit the iodine arrangement so that the single color may be disturbed and the polarization degree may be inhibited.
  • the water contact angle exceeds 100 degrees, The hydrophobicity of the polarizer is strong and the adhesion to the polarizer is difficult.
  • the transparent base film is a compensation film for compensating the polarizer protective film or the optical characteristics of the polarizer, and a polymer film known in the art can be used. More specifically, though not limited thereto, the transparent base film may be an acrylic film, a PET film, an acrylic primer treated PET film, a polynorbornene (PNB) film, a COP film, a polycarbonate film, and an NRT And a TAC film including a polyester film (Fuji Film), N TAC (Konica), V TAC (Fuji Film), UZ TAC (Fuji Film), and the like. Of these, an acrylic film is particularly preferable.
  • the acrylic film used as the transparent base film may contain a (meth) acrylate resin.
  • the film containing the (meth) acrylate resin can be obtained by molding a molding material containing, for example, a (meth) acrylate resin as a main component by extrusion molding.
  • the acrylic film may be a film comprising a copolymer containing an alkyl (meth) acrylate unit and a styrene unit, and an aromatic resin having a carbonate moiety in the main chain, or may be a film containing an alkyl (meth) acrylate unit, A 3 to 6 membered heterocyclic unit substituted with at least one carbonyl group, and a vinyl cyanide unit.
  • the acrylic film may be a film comprising a (meth) acrylate-based resin having an aromatic ring.
  • the (meth) acrylate-based resin having an aromatic ring include (a) a (meth) acrylate-based unit containing at least one (meth) acrylate-based derivative described in Korean Patent Laid-open No. 10-2009-0115040; (b) an aromatic-based unit having a chain and an aromatic moiety having a hydroxyl group-containing moiety; And (c) a styrene-based unit containing at least one styrenic derivative.
  • the units (a) to (c) may be included in the resin composition in the form of separate copolymers, and two or more of the units (a) to (c) have.
  • the acrylic film may be a film containing an acrylic resin having a lactone ring structure.
  • the (meth) acrylate resin having a lactone ring structure include, for example, lactones described in Japanese Unexamined Patent Application Publication No. 2000-230016, Japanese Unexamined Patent Application Publication No. 2001-151814, Japanese Unexamined Patent Application Publication No. 2002-120326, (Meth) acrylate-based resin having a cyclic structure.
  • thermoplastic resin composition may be prepared by thoroughly mixing a (meth) acrylate resin, other polymers, additives, and the like by any appropriate mixing method, (Meth) acrylate resin, other polymers, additives and the like may be prepared as separate solutions and then mixed to form a uniform mixture liquid, followed by film formation.
  • thermoplastic resin composition is prepared by pre-blending the film raw material with any suitable mixer such as an omni mixer, and then extruding and kneading the resulting mixture.
  • the mixer used for the extrusion kneading is not particularly limited, and any suitable mixer such as an extruder such as a single screw extruder, a twin screw extruder, or a press kneader can be used.
  • any suitable film forming method such as a solution casting method (solution casting method), a melt extrusion method, a calendering method, a compression molding method and the like can be used.
  • a solution casting method (solution casting method) and a melt extrusion method are preferable.
  • solvent used in the solution casting method examples include aromatic hydrocarbons such as benzene, toluene and xylene; Aliphatic hydrocarbons such as cyclohexane and decalin; Esters such as ethyl acetate and butyl acetate; Ketones such as acetone, methyl ethyl ketone and methyl isobutyl ketone; Alcohols such as methanol, ethanol, isopropanol, butanol, isobutanol, methyl cellosolve, ethyl cellosolve and butyl cellosolve; Ethers such as tetrahydrofuran and dioxane; Halogenated hydrocarbons such as dichloromethane, chloroform and carbon tetrachloride; Dimethylformamide; Dimethyl sulfoxide and the like. These solvents may be used alone or in combination of two or more.
  • Examples of the apparatus for carrying out the solution casting method include a drum casting machine, a band casting machine and a spin coater.
  • Examples of the melt extrusion method include a T-die method and an inflation method.
  • the molding temperature is preferably 150 to 350 ⁇ ⁇ , more preferably 200 to 300 ⁇ ⁇ .
  • a T-die When a film is formed by the T-die method, a T-die is attached to the tip of a known single-screw extruder or a twin-screw extruder, and a rolled film is obtained by winding a film extruded in a film form.
  • uniaxial stretching can also be performed by stretching in the extrusion direction by appropriately adjusting the temperature of the winding roll.
  • simultaneous biaxial stretching, sequential biaxial stretching, and the like can also be carried out by stretching the film in a direction perpendicular to the extrusion direction.
  • the acrylic film may be either an unoriented film or a stretched film.
  • a stretched film it may be a uniaxially stretched film or a biaxially stretched film, and in the case of a biaxially stretched film, it may be a simultaneous biaxially stretched film or a sequential biaxially stretched film.
  • the mechanical strength is improved and the film performance is improved.
  • the acrylic film can suppress an increase in retardation even when stretching, and can maintain optical isotropy.
  • the stretching temperature is preferably in the vicinity of the glass transition temperature of the thermoplastic resin composition as the raw material of the film and is preferably (glass transition temperature-30 ⁇ ⁇ ) to (glass transition temperature + 100 ⁇ ⁇ ) Temperature -20 ⁇ ⁇ ) to (glass transition temperature + 80 ⁇ ⁇ ). If the stretching temperature is lower than (glass transition temperature -30 ⁇ ⁇ ), there is a possibility that a sufficient stretching ratio may not be obtained. On the other hand, if the stretching temperature exceeds (glass transition temperature + 100 deg. C), the resin composition may flow (flow), and stable drawing may not be performed.
  • the stretching ratio defined by the area ratio is preferably 1.1 to 25 times, more preferably 1.3 to 10 times. If the draw ratio is less than 1.1 times, there is a possibility that the toughness accompanying the draw may not be improved. If the stretching magnification exceeds 25 times, there is a possibility that the effect of increasing the stretching magnification may not be recognized.
  • the stretching speed is preferably 10 to 20,000% / min, more preferably 100 to 10,000% / min in one direction.
  • the drawing speed is less than 10% / min, it takes a long time to obtain a sufficient drawing magnification, which may increase the manufacturing cost. If the stretching speed is higher than 20,000% / min, the stretched film may be broken.
  • the acrylic film may be subjected to a heat treatment (annealing) after the stretching treatment so as to stabilize its optical isotropy or mechanical properties.
  • the heat treatment conditions are not particularly limited and any suitable conditions known in the art can be employed.
  • the transparent base film may be subjected to a surface treatment for improving the adhesive strength, for example, on at least one surface of the optical film, at least one surface selected from the group consisting of alkali treatment, corona treatment, and plasma treatment Processing can be performed.
  • the adhesive layer, the primer layer, and the transparent base film may be attached to only one side of the polarizer, or may be attached to both sides of the polarizer.
  • the primer layer is preferably formed of a primer composition having a solid content of about 5 to 15% 30 parts by weight. Also, the primer layer may be formed to a thickness of about 200 to 400 nm.
  • the primer layer formed on the UV unirradiated surface contains more crosslinker than the primer layer formed on the UV irradiation surface desirable.
  • the primer layer on the UV irradiation side is formed of a primer composition having a solid content of about 5 to 15%, and the primer composition has a crosslinking agent in an amount of 0 to 30 parts by weight per 100 parts by weight of the primer composition .
  • the primer layer may be formed to a thickness of about 200 to 400 nm.
  • the primer layer of the non-UV surface is preferably formed of a primer composition having a solid content of about 5 to 15%, and the primer composition contains 5 to 30 parts by weight of a crosslinking agent per 100 parts by weight of the primer composition .
  • the primer layer may be formed to a thickness of about 200 to 400 nm.
  • the primer layer of the UV non-irradiating surface can be harder to cure when forming the primer layer of the same composition. Therefore, it is preferable to increase the content of the crosslinking agent in the primer layer formed on the UV non-irradiation surface so that the primer layer can be completely cured.
  • the polarizer according to the present invention may be formed by applying a primer composition on one side of a transparent substrate film to form a primer layer, applying an adhesive composition on one side of the primer layer or the polarizer to form an adhesive layer, The transparent substrate film is laminated, and then the adhesive composition is cured through light irradiation.
  • the polarizing plate according to the present invention When the polarizing plate according to the present invention was immersed in water at a temperature of 60 ⁇ for 24 hours, the discoloration of the polarizing plate in the MD direction was less than 10 mm and the water resistance was excellent.
  • the polarizing plate of the present invention can be applied to optical devices such as liquid crystal display devices.
  • the optical element of the present invention may be a liquid crystal display including a liquid crystal panel and polarizing plates provided on both sides of the liquid crystal panel, and at least one of the polarizing plates may be a polarizing plate according to the present invention .
  • the type of the liquid crystal panel included in the liquid crystal display device is not particularly limited.
  • a passive matrix type panel such as a twisted nematic (TN) type, a super twisted nematic (STN) type, a ferroelectic (F) type or a polymer dispersed (PD) type;
  • An active matrix type panel such as a two terminal or a three terminal;
  • a known panel such as an in-plane switching (IPS) panel and a vertical alignment (VA) panel may be used.
  • the types of the other constituent elements constituting the liquid crystal display device for example, the types of the upper and lower substrates (e.g., color filter substrate or array substrate) are not particularly limited, and configurations known in this field are not limited .
  • the styrene-maleic anhydride copolymer resin was a mixture of 85% by weight of styrene, 15% by weight of maleic anhydride hydrate, Dylaeck (weight average molecular weight: 332, and the content of N-cyclohexylmaleimide in the poly (N-cyclohexylmaleimide-co-methylmethacrylate) resin was 6.5% by weight.
  • the obtained raw material pellets were dried in vacuo, melted in an extruder at 260 ⁇ ⁇ , passed through a coat hanger type T-die, and a film having a thickness of 150 ⁇ ⁇ was produced through a chrome casting roll and a drying roll.
  • the film was stretched at a rate of 170% using a pylot stretching machine at 125 DEG C in the MD direction using the speed difference of the rolls.
  • CGI 819 as a radical initiator was added to 100 parts by weight of a resin composition prepared by adding 50 wt% of 2-HEA (2-hydroxyethyl acrylate), 25 wt% of PEA (phenoxyethyl acrylate) and 25 wt% of IBOA (isobornyl acrylate)
  • a resin composition prepared by adding 50 wt% of 2-HEA (2-hydroxyethyl acrylate), 25 wt% of PEA (phenoxyethyl acrylate) and 25 wt% of IBOA (isobornyl acrylate) To prepare an adhesive composition S for a polarizing plate.
  • the viscosity of the prepared adhesive composition S was measured to be 12 cP and the glass transition temperature at 25 ⁇ .
  • a 10% by weight of a primer composition prepared by corona-treating the acrylic film produced in Production Example 1 and then diluting CK-PUD-F (dim light urethane dispersion) with pure water was coated with a carbodiimide crosslinking agent , Kaboditeite SV-02) were directly coated and then stretched at 130 ° C in a TD direction using a tenter to obtain an acrylic film having a thickness of 400 nm.
  • the adhesive compositions A to N were coated on both surfaces of the PVA element with a sphere, the acrylic film was laminated on both surfaces of the PVA element, and the conditions were set so that the thickness of the final adhesive layer was 1 to 2 ⁇ . I passed it. Then, a polarizing plate was prepared by irradiating ultraviolet rays of 500 mJ / cm 2 using a metal halide lamp on the surface on which the acrylic film was laminated.
  • a polarizing plate was produced in the same manner as in Examples 1 to 12 except that M to S were used as the adhesive composition.
  • peeling strength of polarizing plate The peeling strength of the polarizing film and the polymer film was measured. The peeling test was carried out by using a polarizing plate having a width of 20 mm and a length of 100 mm and measuring the peeling force at the time of peeling at a speed of 300 mm / min and 90 degrees. Cm < 3 > / cm and a case where the peeling force was less than 1.5 N / cm was rated as poor.
  • the polarizing plate was laminated on a glass substrate, and immersed in a 60 ° C thermostat. After 8 hours, the water resistance of the polarizer was determined by decoloring the end of the polarizing plate. The case of no deformation was indicated as OK, and the case of discoloration was indicated as NG.
  • a primer composition having a solid content of 10% by weight prepared by corona-treating the acrylic film prepared in (1) of Production Example 1 and then diluting with pure water CK-PUD-F (dimmer urethane dispersion) 5 parts by weight of a crosslinking agent (Cabodilite SV-02, manufactured by Nisshinbo) was directly coated on the primer composition, and the primer composition was stretched by 190% in a TD direction at 130 ⁇ using a tenter to obtain an acrylic film having a primer layer thickness of 400 nm (a).
  • a primer composition having a solid content of 10% by weight prepared by corona-treating the acrylic film prepared in (1) of Production Example 1 and then diluting with pure water CK-PUD-F (dimmer urethane dispersion) 10 parts by weight of a crosslinking agent (Kabodelite SV-02, manufactured by Nisshinbo) was directly coated on the primer composition # 7 and then stretched by 190% in a TD direction at 130 ° C using a tenter to obtain an acrylic film having a primer layer thickness of 400 nm (b).
  • the adhesive compositions A, F, G, and K were coated on both sides of the PVA element with a sphere and the acrylic films (a) and (b) were laminated on both sides of the PVA element, Mu m, and then passed through a laminator (5 m / min). Then, a polarizing plate was prepared by irradiating ultraviolet rays of 500 mJ / cm 2 onto the surface of the acrylic film (a) laminated using a metal halide lamp.
  • a 10% by weight of a primer composition prepared by corona-treating the acrylic film prepared in Preparation Example 1 and then diluting CK-PUD-F (dim light urethane dispersion) with pure water was coated with an oxazoline crosslinking agent (WS700 ) Was directly coated on the primer composition # 6.
  • the primer composition was stretched by 190% in the TD direction at 130 ⁇ using a tenter to prepare an acrylic film having a primer layer thickness of 400 nm.
  • the adhesive compositions A, F, and K were coated on both sides of the PVA element with a sphere, the acrylic film was laminated on both sides of the PVA element, and the conditions were set so that the thickness of the final adhesive layer was 1 to 2 ⁇ , I passed the laminator. Then, a polarizing plate was prepared by irradiating ultraviolet rays of 500 mJ / cm 2 using a metal halide lamp on the surface on which the acrylic film was laminated.

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  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Polarising Elements (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Abstract

La présente invention porte sur une composition adhésive pour une plaque de polarisation et une plaque de polarisation l'utilisant, la composition adhésive comprenant : 100 parties en poids d'un premier composé époxy dans lequel la température de transition vitreuse d'un homopolymère est de 120°C ou plus ; 30-100 parties en poids d'un second composé époxy dans lequel la température de transition vitreuse d'un homopolymère est de 60°C ou moins ; et 0,5-20 parties en poids d'un initiateur de photopolymérisation cationique.
PCT/KR2012/008333 2011-10-14 2012-10-12 Adhésif pour une plaque de polarisation et plaque de polarisation le comprenant WO2013055158A2 (fr)

Priority Applications (3)

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JP2013541937A JP6066211B2 (ja) 2011-10-14 2012-10-12 偏光板用接着剤、偏光板及び光学素子
CN201280009387.6A CN103415584B (zh) 2011-10-14 2012-10-12 用于偏振板的粘合剂和包括该粘合剂的偏振板
US13/824,199 US9487685B2 (en) 2011-10-14 2012-10-12 Adhesive for polarizing plate and polarizing plate including the same

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KR20110105505 2011-10-14
KR10-2011-0105505 2011-10-14
KR10-2011-0145112 2011-12-28
KR20110145112 2011-12-28
KR10-2012-0070904 2012-06-29
KR20120070904 2012-06-29
KR10-2012-0113305 2012-10-12
KR1020120113305A KR101378817B1 (ko) 2011-10-14 2012-10-12 편광판용 접착제 및 이를 포함하는 편광판

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TWI558539B (zh) * 2013-06-19 2016-11-21 Ｌｇ化學股份有限公司 層壓板
KR101705944B1 (ko) 2013-06-19 2017-02-10 주식회사 엘지화학 적층체
KR101620164B1 (ko) * 2013-09-30 2016-05-12 주식회사 엘지화학 라디칼 경화형 접착제 조성물 및 이를 포함하는 편광판
KR101650235B1 (ko) * 2013-09-30 2016-08-22 주식회사 엘지화학 편광판
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JP4561936B1 (ja) * 2009-09-04 2010-10-13 東洋インキ製造株式会社 偏光板及び偏光板形成用光硬化性接着剤
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