WO2012144260A1 - カチオン重合性接着剤及びそれを用いて得られた偏光板 - Google Patents
カチオン重合性接着剤及びそれを用いて得られた偏光板 Download PDFInfo
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- WO2012144260A1 WO2012144260A1 PCT/JP2012/053923 JP2012053923W WO2012144260A1 WO 2012144260 A1 WO2012144260 A1 WO 2012144260A1 JP 2012053923 W JP2012053923 W JP 2012053923W WO 2012144260 A1 WO2012144260 A1 WO 2012144260A1
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- polymerizable adhesive
- mass
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- cationic polymerizable
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- 0 CC(C1OC1C1*)C(*)C1C(C(*)C(*)C1OC11)C1O* Chemical compound CC(C1OC1C1*)C(*)C1C(C(*)C(*)C1OC11)C1O* 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/20—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the epoxy compounds used
- C08G59/22—Di-epoxy compounds
- C08G59/24—Di-epoxy compounds carbocyclic
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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
- C09J201/00—Adhesives based on unspecified macromolecular compounds
- C09J201/02—Adhesives based on unspecified macromolecular compounds characterised by the presence of specified groups, e.g. terminal or pendant functional groups
- C09J201/06—Adhesives based on unspecified macromolecular compounds characterised by the presence of specified groups, e.g. terminal or pendant functional groups containing oxygen atoms
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/68—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the catalysts used
- C08G59/687—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the catalysts used containing sulfur
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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
- 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
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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
- C09J163/00—Adhesives based on epoxy resins; Adhesives based on derivatives of epoxy resins
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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
- C09J171/00—Adhesives based on polyethers obtained by reactions forming an ether link in the main chain; Adhesives based on derivatives of such polymers
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
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- 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
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- 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
- G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
Definitions
- the present invention relates to a cationic polymerizable adhesive that can be used in various applications including the production of polarizing plates used for liquid crystal displays, for example.
- a cationically polymerizable adhesive that is less likely to cause curing inhibition due to oxygen in the atmosphere and that can proceed with a curing reaction even after the supply of energy such as ultraviolet rays is stopped is drawing attention. For this reason, the development of cationically polymerizable adhesives has made remarkable progress in recent years, and adhesives suitable for various applications have been reported.
- Examples of the cationic polymerizable adhesive include a glycidyl ether group-containing compound obtained by distilling cyclohexanedimethanol diglycidyl ether, and a glycidyl ether group-containing compound obtained by distilling bisphenol F-type diglycidyl ether.
- a cationically polymerizable adhesive containing a hydrolyzable silyl group and epoxy group-containing compound and a cationic polymerization initiator and having a chlorine content of 500 ppm is disclosed (for example, see Patent Document 1). .
- a triacetyl cellulose (TAC) film and a cycloolefin polymer (COP) film have been widely used, and the cationic polymerizable adhesive is used for a TAC film. It has a practically usable level of adhesiveness.
- the cationic polymerizable adhesive has a low adhesive strength with respect to the acrylic resin film, further improvement in the adhesive strength is desired.
- the cationic polymerizable adhesive has a relatively high viscosity, when the adhesive is applied to a protective film or a polarizer, unevenness occurs in the adhesive layer, which affects the optical characteristics of the polarizing plate. It also had problems such as causing
- the problem to be solved by the present invention is to provide a cationic polymerizable adhesive having an excellent adhesive strength not only for various protective films but also for an acrylic resin film, and a polarizing plate obtained using the same. It is.
- the present inventors diligently studied various combinations of cationically polymerizable compounds while advancing studies to solve the above problems.
- the problem of the present invention can be solved only when a specific amount of an oxetane compound having two or more oxetanyl groups and an alicyclic epoxy compound having a specific structure is used with respect to the aromatic glycidyl ether. I found it.
- the present invention relates to an aromatic glycidyl ether (A), an oxetane compound (B) having two or more oxetanyl groups, an alicyclic epoxy compound (C) represented by the following general formula (7), and initiation of cationic polymerization.
- the present invention relates to a cationically polymerizable adhesive characterized by using an epoxy compound (C) in the range of 15 to 280 parts by mass and a polarizing plate obtained by bonding a polarizer and a protective film using the same.
- R 1 , R 2 and R 3 each independently represents a hydrogen atom or a methyl group.
- the cationically polymerizable adhesive of the present invention has excellent adhesive strength not only for various protective films but also for acrylic resin films.
- the cationic polymerizable adhesive of the present invention has low viscosity and good curability, for example, even when the adhesive of the present invention is applied to a protective film or a polarizer, the adhesive is bonded. Unevenness does not occur in the agent layer, and the optical properties of the polarizing plate are not adversely affected.
- the aromatic glycidyl ether (A) is an essential component for providing adhesive strength.
- the aromatic glycidyl ether (A) those having two or more glycidyl ether groups are preferably used for imparting good adhesiveness, and more preferably 2 to 6 are used.
- the aromatic glycidyl ether (A) include bisphenol A glycidyl ether, bisphenol F glycidyl ether, bisphenol S glycidyl ether, and bisphenol AD glycidyl ether. These aromatic glycidyl ethers may be used alone or in combination of two or more. Among these, bisphenol A type glycidyl ether and bisphenol F type glycidyl ether are preferably used from the viewpoint of improving adhesive strength.
- bisphenol A glycidyl ether for example, bisphenol A diglycidyl ether can be used.
- bisphenol F-type glycidyl ether for example, bisphenol F diglycidyl ether can be used.
- aromatic glycidyl ether (A) bisphenol A diglycidyl ether and bisphenol F can be further improved from the viewpoint of further improving the curability and appropriately adjusting the hardness of the cured product and improving the adhesive strength. It is preferable to use one or more selected from the group consisting of diglycidyl ethers.
- aromatic glycidyl ether (A) and other glycidyl ethers may be used in combination as long as the effects of the present invention are not impaired.
- Examples of the other glycidyl ethers include aliphatic glycidyl compounds having three glycidyl ether groups such as trimethylolpropane triglycidyl ether, glycerin triglycidyl ether, polyglycerol triglycidyl ether, and diglycerol triglycidyl ether, and trimethylol.
- Two glycidyl ether groups such as propane diglycidyl ether, 1,6-hexanediol diglycidyl ether, 1,4-butanediol diglycidyl ether, cyclohexanedimethanol diglycidyl ether, propylene glycol diglycidyl ether, diethylene glycol diglycidyl ether, etc.
- the glycidyl compound etc. which have can be used.
- hydrogenated bisphenol A-type glycidyl ether or hydrogenated bisphenol F-type glycidyl ether obtained by hydrogenating the aromatic glycidyl ether (A) can also be used.
- the oxetane compound (B) is an essential component particularly for imparting low viscosity.
- the use of the oxetane compound (B) in the range of 120 to 380 parts by mass with respect to 100 parts by mass of the aromatic glycidyl ether (A) is essential for solving the problems of the present invention.
- the range of 140 to 375 parts by mass is more preferable, and the range of 140 to 360 parts by mass is more preferable with respect to 100 parts by mass of the aromatic glycidyl ether (A).
- oxetane compound (B) one having 2 or more, preferably 2 to 4 oxetanyl groups contributing to cationic polymerization can be used.
- oxetane compound (B) specifically, for example, compounds represented by the following general formulas (1) and (2) can be used.
- each R 1 is independently a hydrogen atom, a linear, branched or cyclic alkyl group having 1 to 6 carbon atoms, an allyl group, an aryl group, or an aralkyl group.
- a furyl group or a thienyl group each R 2 independently represents a divalent organic residue, and each Z independently represents an oxygen atom or a sulfur atom.
- Examples of the linear, branched or cyclic alkyl group having 1 to 6 carbon atoms represented by R 1 include, for example, methyl group, ethyl group, n- or i-propyl group, n-, i- or t- A butyl group, a pentyl group, a hexyl group, a cyclohexyl group, and the like; and an aryl group such as a phenyl, naphthyl, tolyl, and xylyl group; and an aralkyl group such as a benzyl and phenethyl group It is.
- examples of the divalent organic residue represented by R 2 include a linear, branched or cyclic alkylene group and a poly (oxy) having 4 to 30 carbon atoms.
- the linear, branched or cyclic alkylene group constituting R 2 has 1 carbon atom such as methylene group, ethylene group, 1,2- or 1,3-propylene group, butylene group, cyclohexylene group and the like.
- An alkylene group of ⁇ 15 is preferred.
- the poly (oxyalkylene) group having 4 to 30 carbon atoms is preferably one having 4 to 8 carbon atoms, such as a poly (oxyethylene) group or a poly (oxypropylene) group. Is preferred.
- R 3 represents an oxygen atom, a sulfur atom, CH 2 , NH, SO, SO 2 , C (CF 3 ) 2 or C (CH 3 ) 2 .
- R 4 represents an alkylene group having 1 to 6 carbon atoms, an arylene group, and a functional group represented by the following general formula (5).
- a represents an integer of 1 to 6
- b represents an integer of 1 to 15.
- b is preferably an integer of 1 to 3.
- the oxetane compounds having 2 to 4 oxetane ring structures include, for example, Aron oxetane OXT-221, Aron oxetane OXT-121, Aron oxetane OXT-223 (above, manufactured by Toagosei Co., Ltd.), etanacol OXBP, etanacol OXTP Etanacol OXIPA (above, manufactured by Ube Industries) is commercially available.
- the molecular weight of the oxetane compound (B) is preferably in the range of 100 to 800, more preferably in the range of 100 to 500, from the viewpoint of further improving the low viscosity.
- the adhesive layer is usually formed as a thin film (several ⁇ m thick) in order to sufficiently cure. This is because the adhesive needs to have a low viscosity in order to uniformly apply the adhesive with the above-mentioned film thickness.
- the molecular weight of the oxetane compound (B) having two or more oxetanyl groups indicates the molecular weight obtained by calculation from the structural formula.
- oxetane compound (B) having two or more oxetanyl groups among those described above, it is preferable to use those represented by the general formula (1), and in particular, R 1 in the formula is an ethyl group.
- R 1 in the formula is an ethyl group.
- using bis [1-ethyl (3-oxetanyl)] methyl ether in which R 2 is methylene can further reduce the film thickness of the adhesive after curing, thereby improving curability and adhesiveness. Since it can improve further, it is especially preferable.
- an oxetane compound having one oxetanyl group may be used in combination with the oxetane compound (B) having two or more oxetanyl groups as long as the effects of the present invention are not impaired. .
- oxetanyl compound having one oxetanyl group for example, a compound represented by the following general formula (6) can be used.
- R 1 in the general formula (6) represents a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, an alkoxyalkyl group having 1 to 5 carbon atoms, or a hydroxyalkyl group having 1 to 6 carbon atoms.
- R 2 represents a hydrogen atom, an optionally branched alkyl group having 1 to 10 carbon atoms, an aliphatic cyclic structure, or an aromatic structure.
- Examples of the alkyl group having 1 to 8 carbon atoms that can constitute R 1 in the general formula (6) include a methyl group, an ethyl group, an n-propyl group, an i-propyl group, and a 2-ethylhexyl group. Is mentioned.
- Examples of the alkoxyalkyl group having 1 to 5 carbon atoms that can constitute R 1 in the general formula (6) include a methoxymethyl group, an ethoxymethyl group, a propoxymethyl group, a methoxyethyl group, and an ethoxyethyl group. And propoxyethyl group.
- Examples of the hydroxyalkyl group having 1 to 6 carbon atoms that can constitute R 1 in the general formula (6) include a hydroxymethyl group, a hydroxyethyl group, and a hydroxypropyl group.
- the optionally branched alkyl group having 1 to 10 carbon atoms that can constitute R 2 in the general formula (6) is a linear alkyl group such as a methyl group, an ethyl group, or a propyl group. And a branched alkyl group such as 2-ethylhexyl group.
- aliphatic cyclic structure may constitute R 2 in the general formula (6), such as cyclohexyl group and the like.
- the cyclohexyl group or the like may have an alkyl group or the like instead of a hydrogen atom.
- the aromatic structure may constitute R 2 in the general formula (6), for example, a phenyl group and the like.
- the phenyl group or the like may have an alkyl group or the like instead of a hydrogen atom.
- the alicyclic epoxy compound (C) component is an alicyclic epoxy compound represented by the following general formula (7).
- R 1 , R 2 and R 3 each independently represents a hydrogen atom or a methyl group.
- the said alicyclic epoxy compound means the compound containing the alicyclic epoxy group which has an epoxy group in an alicyclic structure.
- the alicyclic epoxy compound (C) is an essential component particularly for imparting good adhesive strength to an acrylic resin film.
- the use of the alicyclic epoxy compound (C) in the range of 15 to 280 parts by mass with respect to 100 parts by mass of the aromatic glycidyl ether (A) is essential for solving the problems of the present invention. .
- it is more preferably used in the range of 20 to 270 parts by mass, and more preferably 35 to 250 parts by mass with respect to 100 parts by mass of the aromatic glycidyl ether (A).
- alicyclic epoxy compounds (C) it is preferable to use 1,2: 8,9-diepoxy limonene from the viewpoint of further improving the adhesive strength to an acrylic resin film.
- examples of commercially available products that can be suitably used as the alicyclic epoxy compound (C) include Celoxide 3000 (manufactured by Daicel Chemical Industries, Ltd.).
- alicyclic epoxy compounds may be used in combination with the alicyclic epoxy compound (C) as long as the effects of the present invention are not impaired.
- Examples of the other alicyclic epoxy compounds include epoxy compounds having 2 to 4 alicyclic epoxy groups.
- Examples of the alicyclic epoxy compound having two alicyclic epoxy groups include 3,4-epoxycyclohexenylmethyl-3,4-epoxycyclohexanecarboxylate represented by the following general formula (8) (in the general formula (8) , A is a compound of 0.), a caprolactone modified product thereof (in the general formula (8), a is a compound of 1), a trimethyl caprolactone modified product thereof (structural formula (9) and structural formula (10)), and A valerolactone modified product (Structural Formula (11) and Structural Formula (12)) or a compound represented by Structural Formula (13) can be used.
- a valerolactone modified product Structural Formula (11) and Structural Formula (12)
- Structural Formula (13) can be used.
- alicyclic epoxy compound having two alicyclic epoxy groups a compound represented by the following general formula (14) can also be used.
- R 1 to R 6 each independently represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms.
- R 1 to R 6 each independently represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms.
- dicyclohexyl-3,3′-diepoxide can be used as the compound represented by the general formula (14).
- alicyclic epoxy compound having three alicyclic epoxy groups a compound represented by the following general formula (15) can be used.
- a and b are each independently 0 or 1, and they may be the same or different.
- the alicyclic epoxy compound represented by the general formula (15) for example, Epolide GT301, Epolide GT302 (manufactured by Daicel Chemical Industries, Ltd.) and the like are commercially available.
- alicyclic epoxy compound having four alicyclic epoxy groups for example, a compound represented by the following general formula (16) can be used.
- a to d each independently represent 0 or 1, and they may be the same or different.
- the alicyclic epoxy compound represented by the general formula (16) for example, Epolide GT401, Epolide GT403 (manufactured by Daicel Chemical Industries, Ltd.) and the like are commercially available.
- the cationic polymerization initiator (D) used in the present invention refers to a compound that generates an acid capable of initiating cationic polymerization upon irradiation with energy rays such as ultraviolet rays.
- the cation portion is aromatic sulfonium, aromatic iodonium, aromatic diazonium, aromatic ammonium, thianthrhenium, thioxanthonium, (2,4-cyclopentadiene-1- Yl) [(1-methylethyl) benzene] -Fe cation, and the anion moiety is BF 4 ⁇ , PF 6 ⁇ , SbF 6 ⁇ , [BX 4 ] ⁇ (where X is at least two fluorine atoms or An onium salt composed of a phenyl group substituted with a trifluoromethyl group) can be used alone or in combination of two or more.
- aromatic sulfonium salt examples include bis [4- (diphenylsulfonio) phenyl] sulfide bishexafluorophosphate, bis [4- (diphenylsulfonio) phenyl] sulfide bishexafluoroantimonate, bis [4- ( Diphenylsulfonio) phenyl] sulfide bistetrafluoroborate, bis [4- (diphenylsulfonio) phenyl] sulfide tetrakis (pentafluorophenyl) borate, diphenyl-4- (phenylthio) phenylsulfonium hexafluorophosphate, diphenyl-4- ( Phenylthio) phenylsulfonium hexafluoroantimonate, diphenyl-4- (phenylthio) phenylsulfonium t
- aromatic iodonium salt examples include diphenyliodonium hexafluorophosphate, diphenyliodonium hexafluoroantimonate, diphenyliodonium tetrafluoroborate, diphenyliodonium tetrakis (pentafluorophenyl) borate, bis (dodecylphenyl) iodonium hexafluorophosphate.
- aromatic diazonium salt for example, phenyldiazonium hexafluorophosphate, phenyldiazonium hexafluoroantimonate, phenyldiazonium tetrafluoroborate, phenyldiazonium tetrakis (pentafluorophenyl) borate and the like can be used.
- aromatic ammonium salt examples include 1-benzyl-2-cyanopyridinium hexafluorophosphate, 1-benzyl-2-cyanopyridinium hexafluoroantimonate, 1-benzyl-2-cyanopyridinium tetrafluoroborate, 1-benzyl -2-cyanopyridinium tetrakis (pentafluorophenyl) borate, 1- (naphthylmethyl) -2-cyanopyridinium hexafluorophosphate, 1- (naphthylmethyl) -2-cyanopyridinium hexafluoroantimonate, 1- (naphthylmethyl) -2-Cyanopyridinium tetrafluoroborate, 1- (naphthylmethyl) -2-cyanopyridinium tetrakis (pentafluorophenyl) borate, and the like can be used.
- thioxanthonium salt S-biphenyl 2-isopropyl thioxanthonium hexafluorophosphate or the like can be used.
- the (2,4-cyclopentadien-1-yl) [(1-methylethyl) benzene] -Fe salt includes (2,4-cyclopentadien-1-yl) [(1-methylethyl) benzene.
- Examples of the cationic polymerization initiator (D) include CPI-100P, CPI-101A, CPI-110P, CPI-200K, CPI-210S (manufactured by San Apro Co., Ltd.), a syracure photocuring initiator UVI-6990.
- Syracure photocuring initiator UVI-6922, Syracure photocuring initiator UVI-6976 manufactured by Dow Chemical Japan Co., Ltd.
- the amount of the cationic polymerization initiator (D) used is preferably in the range of 5 to 50 parts by mass as an active ingredient with respect to 100 parts by mass of the aromatic glycidyl ether (A).
- the cationic polymerizable adhesive of the present invention may further contain a silane coupling agent (E) having an epoxy group in order to improve the adhesive strength and the strength of the adhesive layer coating film.
- a silane coupling agent (E) having an epoxy group in order to improve the adhesive strength and the strength of the adhesive layer coating film.
- silane cupping agent (E) having an epoxy group examples include 2- (3,4-epoxycyclohexyl) ethyltriethoxysilane, 2- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, 2- (3, 4-epoxycyclohexyl) ethylmethyldimethoxysilane, 2- (3,4-epoxycyclohexyl) ethylmethyldiethoxysilane, 2- (3,4-epoxycyclohexyl) propyltrimethoxysilane, 2- (3,4-epoxycyclohexyl) ) Alicyclic epoxy group-containing silane coupling agents such as propylmethyldimethoxysilane, 2- (3,4-epoxycyclohexyl) propyltriethoxysilane, 2- (3,4-epoxycyclohexyl) propylmethyldiethoxysilane, Glycidoxypropy
- the amount of the epoxy group-containing silane coupling agent (E) used is preferably in the range of 5 to 100 parts by mass with respect to 100 parts by mass of the aromatic glycidyl ether (A).
- the cationic polymerizable adhesive of the present invention may further contain a photosensitizer (F).
- the cationic polymerizable adhesive of the present invention is used for adhesion between a polarizer and a protective film
- the cationic polymerizable adhesive is applied on the protective film, and then the polarizer is placed on the application surface. Then, from the protective film side, UV irradiation described later may be performed to cure the cationic polymerizable adhesive.
- the photosensitizer (F) may be included in the cationic polymerizable composition. From the viewpoint of improving the curability of the adhesive, it is preferable.
- the photosensitizer (F) for example, anthracene, anthraquinone, thioxanthone, benzophenone, benzoin isopropyl ether, and derivatives of these compounds can be used.
- anthracene, anthraquinone, thioxanthone, benzophenone, benzoin isopropyl ether, and derivatives of these compounds can be used.
- Examples of the anthracene compound exhibiting maximum absorption in light having a wavelength of 380 nm or more include 9,10-dimethoxyanthracene, 9,10-diethoxyanthracene, 9,10-dipropoxyanthracene, and 9,10-diisopropoxy.
- the amount of the photosensitizer (F) used is desirably 0.5 to 10 parts by mass with respect to 100 parts by mass of the aromatic glycidyl ether (A).
- a photosensitizing aid (G) can also be used.
- the photosensitization aid (G) for example, nitrofluorene, naphthalene compounds and the like can be used, and 1,4-dimethoxynaphthalene, 1-ethoxy-4-methoxynaphthalene, 1,4-diethoxynaphthalene, 1,4-dipropoxynaphthalene, 1,4-dibutoxynaphthalene and the like can be preferably used.
- the amount of the photosensitizing aid (G) used is desirably 0.5 to 10 parts by mass with respect to 100 parts by mass of the aromatic glycidyl ether (A).
- the cationic polymerizable adhesive of the present invention includes the aromatic glycidyl ether (A), the oxetane compound (B), the alicyclic epoxy compound (C), and the cationic polymerization initiator (D), if necessary.
- the epoxy group-containing silane coupling agent (E), the photosensitizer (F), and the photosensitization aid (G) are contained within a range that does not impair the effects of the present invention. Various additives may be contained.
- the additive examples include a thixotropic agent, a leveling agent, an antioxidant, a tackifier, a wax, a heat stabilizer, a light stabilizer, a fluorescent brightening agent, a foaming agent, a thermoplastic resin, a thermosetting resin, Organic solvent, conductivity imparting agent, antistatic agent, moisture permeability improver, water repellent, hollow foam, crystal water-containing compound, flame retardant, water absorbent, moisture absorbent, deodorant, foam stabilizer, defoamer
- Antifungal agents, antiseptics, antialgae agents, antiblocking agents, antihydrolysis agents, organic and inorganic water-soluble compounds, and the like can be used.
- a polyol such as a polyether polyol may be contained.
- the cationically polymerizable adhesive of the present invention may contain a cationically polymerizable compound such as vinyl ether or oxolane for the purpose of further improving curability and viscosity reduction.
- vinyl ether examples include butanediol divinyl ether, hexanediol divinyl ether, diethylene glycol divinyl ether, triethylene glycol divinyl ether, neopentyl glycol divinyl ether, cyclohexane dimethanol divinyl ether, and the like.
- the cationically polymerizable adhesive of the present invention has a low viscosity and has a viscosity at room temperature in the range of 10 to 100 mPa ⁇ s.
- the viscosity of the cationic polymerizable adhesive is a value measured with a B-type viscometer at 25 ° C.
- the cationically polymerizable adhesive of the present invention can be produced, for example, by the following method.
- the cationic polymerizable adhesive of the present invention is prepared by using, for example, a container equipped with a stirrer, the aromatic glycidyl ether (A), the oxetane compound (B), the alicyclic epoxy compound (C), It can be produced by mixing and stirring the cationic polymerization initiator (D) and, if necessary, the various additives.
- the cationic polymerizable adhesive of the present invention can be cured by irradiation with energy rays such as ultraviolet rays.
- the cationically polymerizable adhesive of the present invention exhibits adhesiveness only after irradiation with energy rays such as ultraviolet rays.
- the irradiation of the energy beam such as ultraviolet rays, preferably in the range of 10 ⁇ 5000mJ / cm 2, more preferably 20 ⁇ 2500mJ / cm 2 range, particularly good to be preferably in the range of 30 ⁇ 1500mJ / cm 2.
- the ultraviolet ray generation source for example, a known lamp such as a xenon lamp, a xenon-mercury lamp, a metal halide lamp, a high pressure mercury lamp, or a low pressure mercury lamp can be used.
- the amount of ultraviolet irradiation is based on a value measured in a wavelength range of 300 to 390 nm using a UV checker; UV Power PucK (II) (manufactured by Electronic Instrumentation and Technology).
- curing may be further promoted by heating at about 40 to 80 ° C. after irradiation with the energy beam.
- the polarizing plate of the present invention is obtained by adhering a protective film and a polarizer via an adhesive layer made of the cationic polymerizable adhesive.
- the protective film examples include acrylic resin, silicon resin, epoxy resin, fluorine resin, polystyrene resin, polyester resin, polysulfone resin, polyarylate resin, polyvinyl chloride resin, polyvinylidene chloride, norbornene, and the like. Cycloolefin resin, amorphous polyolefin resin, polyimide resin, alicyclic polyimide resin, cellulose resin, PC (polycarbonate), PBT (polybutylene terephthalate), modified PPE (polyphenylene ether), PEN ( Polyethylene naphthalate), a film using PET (polyethylene terephthalate) or the like, or a biodegradable film such as a polylactic acid polymer can be used.
- an acrylic resin or a thermoplastic acrylic resin having a glass transition temperature (Tg) of 100 ° C. or higher can be used, and elastic particles having a number average particle diameter of 2.0 ⁇ m or less are contained in the acrylic resin. It is good also as a protective film in which the elastic body particle is unevenly distributed in the thickness direction center part of the protective film.
- the thickness of the protective film used when producing the polarizing plate of the present invention varies depending on the application used, but is preferably in the range of about 20 ⁇ m to 100 ⁇ m.
- the thickness of the polarizer is usually preferably in the range of about 5 ⁇ m to 50 ⁇ m.
- the polarizer is not particularly limited, and various types can be used.
- hydrophilic polymers such as polyvinyl alcohol, partially formalized polyvinyl alcohol, and ethylene / vinyl acetate copolymer partially saponified products.
- a dichroic material obtained by adsorbing a dichroic material such as iodine or a dichroic dye to a plastic substrate made of a compound and uniaxially stretching the surface of a stretched film obtained by uniaxially stretching the plastic substrate.
- Polyene-based oriented films such as materials adsorbed, polyvinyl alcohol dehydrated products and polyvinyl chloride dehydrochlorinated products can be used. Among these, it is preferable to use a film in which a polyvinyl alcohol film and a dichroic substance such as iodine are adsorbed.
- the cationic polymerizable adhesive is coated on the protective film, and then the coated surface is irradiated with the above-mentioned amount of ultraviolet light, and then a polarizer is mounted on the coated surface. It can also be produced by placing and adhering, and the cationic polymerizable adhesive is coated on the protective film, and then a polarizer is placed on the coated surface, and then from the protective film side. It can also be produced by irradiating the aforementioned amount of ultraviolet rays.
- the cationic polymerizable adhesive is coated on the polarizer, and then the coated surface is irradiated with the above-described amount of ultraviolet light, and then a protective film is placed on the coated surface. It can also be produced by bonding, and the cationic polymerizable adhesive is applied on the polarizer, and then a protective film is placed on the coated surface, and then the protective film side as described above. It can also be produced by irradiating an amount of ultraviolet light.
- the thickness of the adhesive layer made of the cationic polymerizable adhesive is preferably as thin as possible for reasons such as optical properties being impaired, and specifically, it is 5 ⁇ m or less. Is preferred.
- the polarizing plate of the present invention is, for example, coated on one surface of two protective films with the cationic polymerizable adhesive, and then irradiated with the above amount of ultraviolet rays on the coated surface. May be placed on both sides of the polarizer and bonded to form a laminate of protective film / cationic polymerizable adhesive layer / polarizer / cationic polymeric adhesive layer / protective film from above.
- the cationic polymerizable adhesive is applied to one side of each of the two protective films, the applied surface is placed on both sides of the polarizer, and then the above-described amount of ultraviolet rays is irradiated to the surface.
- a laminate can also be produced.
- the method for applying the cationic polymerizable adhesive is not particularly limited. For example, it is applied by a slit coater method such as a curtain flow coater method or a die coater method, a knife coater method, a roll coater method, a gravure coater method, a spray, or the like. Can be used.
- a slit coater method such as a curtain flow coater method or a die coater method, a knife coater method, a roll coater method, a gravure coater method, a spray, or the like.
- the polarizing plate of the present invention obtained by the above method can be used for a member constituting a display such as a mobile communication terminal such as a mobile phone, a liquid crystal television, a personal computer, and a portable game machine.
- a display such as a mobile communication terminal such as a mobile phone, a liquid crystal television, a personal computer, and a portable game machine.
- Kuraraypoval PVA-117H Polyvinyl alcohol manufactured by Kuraray Co., Ltd., degree of polymerization 1700, completely saponified product, powder
- an aqueous polyvinyl alcohol solution non-volatile content 8% by mass
- the film was applied onto a release film and then dried for 5 minutes in an environment of 80 ° C., and then the release film was removed to prepare a polyvinyl alcohol film having a thickness of 75 ⁇ m.
- the obtained polyvinyl alcohol film was fixed to a stretching machine, and the film was stretched in hot water at 40 ° C. until it became three times larger in a uniaxial direction.
- the stretched film was adjusted to 30 ° C. containing 0.02 parts by mass of iodine, 2 parts by mass of potassium iodide and 100 parts by mass of water. It was immersed in the aqueous solution. Next, the stretched film was immersed in an aqueous solution adjusted to 56.5 ° C. containing 12 parts by mass of potassium iodide, 5 parts by mass of boric acid, and 100 parts by mass of water. After the immersed stretched film is washed in pure water adjusted to 8 ° C. and dried in an environment of 65 ° C., a polarizer in which iodine is adsorbed and oriented on the surface of the stretched film made of polyvinyl alcohol (polarized light) Film).
- a polarizer in which iodine is adsorbed and oriented on the surface of the stretched film made of polyvinyl alcohol (polarized light) Film).
- Example 1 100 parts by mass of EPICLON EXA-830CRP as an aromatic glycidyl ether (A) in a reaction vessel equipped with a stirrer, reflux condenser, thermometer, dropping funnel and nitrogen gas inlet, oxetane compound having two or more oxetanyl groups As (B), 150 parts by mass of Alonoxetane OXT-221, alicyclic epoxy compound (C), 250 parts by mass of Celoxide 3000, and cationic polymerization initiator (D) as diphenyl-4- (phenylthio) phenylsulfonium hexa
- a cationic polymerizable adhesive having a viscosity of 23 mPa ⁇ s (25 ° C.) was prepared by mixing and stirring 40 parts by mass of a propylene carbonate 50% by mass solution of fluorophosphate.
- the obtained cationic polymerizable adhesive was applied to each surface of the acrylic resin film and the TAC film so as to have a thickness of about 2 ⁇ m using a wire bar, and the coated substrate was coated with the polarizer ( It was bonded to both sides of the polarizing film).
- the polarizing plate which has the structure of protective film / cationic polymerizable adhesive layer / polarizer / cationic polymerizable adhesive layer / protective film was obtained from above by irradiating ultraviolet rays of 1300 mJ / cm 2 .
- Example 2 100 parts by mass of EPICLON EXA-830CRP as an aromatic glycidyl ether (A) in a reaction vessel equipped with a stirrer, reflux condenser, thermometer, dropping funnel and nitrogen gas inlet, oxetane compound having two or more oxetanyl groups (B) 200 parts by mass of Alonoxetane OXT-221, alicyclic epoxy compound (C), 200 parts by mass of Celoxide 3000, and cationic polymerization initiator (D) as diphenyl-4- (phenylthio) phenylsulfonium hexa
- a cationic polymerizable adhesive having a viscosity of 24 mPa ⁇ s (25 ° C.) was prepared by mixing and stirring 40 parts by mass of a 50 mass% propylene carbonate solution of fluorophosphate.
- the obtained cationic polymerizable adhesive was applied to each surface of the acrylic resin film and the TAC film so as to have a thickness of about 2 ⁇ m using a wire bar, and the coated substrate was coated with the polarizer ( It was bonded to both sides of the polarizing film).
- a cumulative ultraviolet ray irradiation device (Fusion LH-6 output 100%, conveyor speed 17.8 m / min) is used, and the accumulated light amount of 300 to 390 nm on the acrylic resin film side is By irradiating ultraviolet rays of 1300 mJ / cm 2 , a polarizing plate having a configuration of protective film / cationic polymerizable adhesive layer / polarizer / cationic polymerizable adhesive layer / protective film was obtained from above.
- Example 3 100 parts by mass of EPICLON EXA-830CRP as an aromatic glycidyl ether (A) in a reaction vessel equipped with a stirrer, reflux condenser, thermometer, dropping funnel and nitrogen gas inlet, oxetane compound having two or more oxetanyl groups As (B), 237.5 parts by mass of Alonoxetane OXT-221, alicyclic epoxy compound (C), 162.5 parts by mass of Celoxide 3000, and cationic polymerization initiator (D) as diphenyl-4- (phenylthio) )
- a cationic polymerizable adhesive having a viscosity of 24 mPa ⁇ s (25 ° C.) was prepared by mixing and stirring 40 parts by mass of a propylene carbonate 50% by mass solution of phenylsulfonium hexafluorophosphate.
- the obtained cationic polymerizable adhesive was applied to each surface of the acrylic resin film and the TAC film so as to have a thickness of about 2 ⁇ m using a wire bar, and the coated substrate was coated with the polarizer ( It was bonded to both sides of the polarizing film).
- the cumulative amount of light from 300 to 390 nm is obtained from the acrylic resin film side using a conveyor type ultraviolet irradiation device (Fusion LH-6 output 100%, conveyor speed 17.8 m / min).
- a polarizing plate having a configuration of protective film / cationic polymerizable adhesive layer / polarizer / cationic polymerizable adhesive layer / protective film was obtained from above.
- Example 4 100 parts by mass of EPICLON EXA-830CRP as an aromatic glycidyl ether (A) in a reaction vessel equipped with a stirrer, reflux condenser, thermometer, dropping funnel and nitrogen gas inlet, oxetane compound having two or more oxetanyl groups (B) 225 parts by mass of Alonoxetane OXT-221, alicyclic epoxy compound (C), 125 parts by mass of Celoxide 3000, and cationic polymerization initiator (D) as diphenyl-4- (phenylthio) phenylsulfonium hexa 40 parts by mass of a 50 mass% solution of propylene carbonate of fluorophosphate and 50 parts by mass of 2- (3,4-epoxycyclohexylethyltrimethoxysilane) as an epoxy group-containing silane coupling agent (E) are mixed and stirred.
- A aromatic glycidyl ether
- B o
- a viscosity of 24 mPa A s (25 ° C.) cationic polymerizable adhesive was prepared.
- the obtained cationic polymerizable adhesive was applied to each surface of the acrylic resin film and the TAC film so as to have a thickness of about 2 ⁇ m using a wire bar, and the coated substrate was coated with the polarizer ( It was bonded to both sides of the polarizing film).
- the polarizing plate which has the structure of protective film / cationic polymerizable adhesive layer / polarizer / cationic polymerizable adhesive layer / protective film was obtained from above by irradiating ultraviolet rays of 1300 mJ / cm 2 .
- Example 5 100 parts by mass of EPICLON EXA-830CRP as an aromatic glycidyl ether (A) in a reaction vessel equipped with a stirrer, reflux condenser, thermometer, dropping funnel and nitrogen gas inlet, oxetane compound having two or more oxetanyl groups As (B), 350 parts by mass of Alonoxetane OXT-221, 50 parts by mass of Celoxide 3000 as an alicyclic epoxy compound (C), and diphenyl-4- (phenylthio) phenylsulfonium hexaxane as a cationic polymerization initiator (D)
- a cationic polymerizable adhesive having a viscosity of 24 mPa ⁇ s (25 ° C.) was prepared by mixing and stirring 40 parts by mass of a 50 mass% propylene carbonate solution of fluorophosphate.
- the obtained cationic polymerizable adhesive was applied to each surface of the acrylic resin film and the TAC film so as to have a thickness of about 2 ⁇ m using a wire bar, and the coated substrate was coated with the polarizer ( It was bonded to both sides of the polarizing film).
- the polarizing plate which has the structure of protective film / cationic polymerizable adhesive layer / polarizer / cationic polymerizable adhesive layer / protective film was obtained from above by irradiating ultraviolet rays of 1300 mJ / cm 2 .
- Example 6 100 parts by mass of EPICLON EXA-830CRP as an aromatic glycidyl ether (A) in a reaction vessel equipped with a stirrer, reflux condenser, thermometer, dropping funnel and nitrogen gas inlet, oxetane compound having two or more oxetanyl groups As (B), 375 parts by mass of Alonoxetane OXT-221, alicyclic epoxy compound (C), 25 parts by mass of Celoxide 3000, and cationic polymerization initiator (D) as diphenyl-4- (phenylthio) phenylsulfonium hexa
- a cationic polymerizable adhesive having a viscosity of 25 mPa ⁇ s (25 ° C.) was prepared by mixing and stirring 40 parts by mass of a propylene carbonate 50% by mass solution of fluorophosphate.
- the obtained cationic polymerizable adhesive was applied to each surface of the acrylic resin film and the TAC film so as to have a thickness of about 2 ⁇ m using a wire bar, and the coated substrate was coated with the polarizer ( It was bonded to both sides of the polarizing film).
- the polarizing plate which has the structure of protective film / cationic polymerizable adhesive layer / polarizer / cationic polymerizable adhesive layer / protective film was obtained from above by irradiating ultraviolet rays of 1300 mJ / cm 2 .
- the cationic polymerizable adhesive having a viscosity of 24 mPa ⁇ s (25 ° C.) was prepared by stirring.
- the obtained cationic polymerizable adhesive was applied to each surface of the acrylic resin film and the TAC film so as to have a thickness of about 2 ⁇ m using a wire bar, and the coated substrate was coated with the polarizer ( It was bonded to both sides of the polarizing film).
- the polarizing plate which has the structure of protective film / cationic polymerizable adhesive layer / polarizer / cationic polymerizable adhesive layer / protective film was obtained from above by irradiating ultraviolet rays of 1300 mJ / cm 2 .
- the obtained cationic polymerizable adhesive was applied to each surface of the acrylic resin film and the TAC film so as to have a thickness of about 2 ⁇ m using a wire bar, and the coated substrate was coated with the polarizer ( It was bonded to both sides of the polarizing film).
- the polarizing plate which has the structure of protective film / cationic polymerizable adhesive layer / polarizer / cationic polymerizable adhesive layer / protective film was obtained from above by irradiating ultraviolet rays of 1300 mJ / cm 2 .
- the obtained cationic polymerizable adhesive was applied to each surface of the acrylic resin film and the TAC film so as to have a thickness of about 2 ⁇ m using a wire bar, and the coated substrate was coated with the polarizer ( It was bonded to both sides of the polarizing film).
- the polarizing plate which has the structure of protective film / cationic polymerizable adhesive layer / polarizer / cationic polymerizable adhesive layer / protective film was obtained from above by irradiating ultraviolet rays of 1300 mJ / cm 2 .
- the obtained cationic polymerizable adhesive was applied to each surface of the acrylic resin film and the TAC film so as to have a thickness of about 2 ⁇ m using a wire bar, and the coated substrate was coated with the polarizer ( It was bonded to both sides of the polarizing film).
- the polarizing plate which has the structure of protective film / cationic polymerizable adhesive layer / polarizer / cationic polymerizable adhesive layer / protective film was obtained from above by irradiating ultraviolet rays of 1300 mJ / cm 2 .
- the obtained cationic polymerizable adhesive was applied to each surface of the acrylic resin film and the TAC film so as to have a thickness of about 2 ⁇ m using a wire bar, and the coated substrate was coated with the polarizer ( It was bonded to both sides of the polarizing film).
- the polarizing plate which has the structure of protective film / cationic polymerizable adhesive layer / polarizer / cationic polymerizable adhesive layer / protective film was obtained from above by irradiating ultraviolet rays of 1300 mJ / cm 2 .
- 90 degree peel strength is What is 3N / 25 mm or more, “ ⁇ ”, What is 1.5N / 25mm or more and less than 3N / 25mm, “ ⁇ ”, What is less than 1.5N / 25mm, "x”, It was evaluated.
- Examples 1 to 6 which are the cationic polymerizable adhesives of the present invention, were found to have excellent adhesive strength, particularly for acrylic resin films.
- the comparative example 1 is an aspect which does not contain an alicyclic epoxy compound, it turned out that adhesive strength is unsatisfactory.
- the mass ratios of the oxetane compound and the alicyclic epoxy compound deviate from the range defined in the present invention, but it was found that the adhesive strength was poor.
- the comparative example 5 is an aspect which does not contain an oxetane compound, it turned out that adhesive strength is unsatisfactory.
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Abstract
Description
R2は、水素原子、分岐していてもよい炭素原子数1~10のアルキル基、脂肪族環式構造、芳香族構造を表す。)
前記一般式(14)に示される化合物としては、具体的には、ジシクロヘキシル-3,3’-ジエポキシドを用いることができる。
(一般式(15)中、a及びbは、それぞれ独立して0又は1であり、それらは同一であっても異なっていてもよい。)
一般式(15)で示される脂環エポキシ化合物としては、例えばエポリードGT301、エポリードGT302(以上、ダイセル化学工業(株)製)等が市販されている。
(前記一般式(16)中、a~dは、それぞれ独立して0又は1を示し、それらは同一であっても異なっていてもよい。)
前記一般式(16)で示される脂環エポキシ化合物としては、例えば、エポリードGT401、エポリードGT403(以上、ダイセル化学工業(株)製)等が市販されている。
前記カチオン重合開始剤(D)は、例えば紫外線等のエネルギー線の照射によりカチオン重合を開始することのできる酸を発生する化合物を指す。
クラレポバールPVA-117H((株)クラレ製のポリビニルアルコール、重合度1700、完全ケン化物、粉末状)を水中に溶解して得られたポリビニルアルコール水溶液(不揮発分8質量%)を、バーコーターを用いて離型フィルム上に塗布し、次いで、80℃の環境下で5分間乾燥した後、前記離型フィルムを除去することによって、厚さ75μmのポリビニルアルコールフィルムを作製した。
次いで、得られたポリビニルアルコールフィルムを延伸機に固定し、40℃の温水中で前記フィルムを一軸方向に3倍の大きさになるまで延伸した。
上記で得られた延伸フィルムの表面に付着した水を除去した後、前記延伸フィルムを、ヨウ素を0.02質量部、ヨウ化カリウムを2質量部及び水を100質量部含有する30℃に調整した水溶液中に浸漬した。
次いで、前記延伸フィルムを、ヨウ化カリウム12質量部、ホウ酸5質量部及び水100質量部を含有する56.5℃に調整した水溶液中に浸漬した。
前記浸漬後の延伸フィルムを8℃に調整した純水中で洗浄した後、65℃の環境下で乾燥することによって、ポリビニルアルコールからなる延伸フィルムの表面にヨウ素が吸着、配向した偏光子(偏光フィルム)を得た。
攪拌機、還流冷却器、温度計、滴下漏斗及び窒素ガス導入口を備えた反応容器に芳香族グリシジルエーテル(A)として、EPICLON EXA-830CRPを100質量部、2個以上のオキセタニル基を有するオキセタン化合物(B)として、アロンオキセタンOXT-221を150質量部、脂環エポキシ化合物(C)として、セロキサイド3000を250質量部、カチオン重合開始剤(D)として、ジフェニル-4-(フェニルチオ)フェニルスルホニウムヘキサフルオロホスフェートのプロピレンカーボネート50質量%溶液を40質量部を、混合、攪拌することによって、粘度23mPa・s(25℃)のカチオン重合性接着剤を調製した。
アクリル樹脂フィルムと、TACフィルムのそれぞれ片表面に、得られたカチオン重合性接着剤を、ワイヤーバーを用いて約2μmの厚みになるようにそれぞれ塗布し、該塗布基材を、前記偏光子(偏光フィルム)の両面に、それぞれ貼り合わせた。次いで、ゴムローラーを用いて加圧した後、コンベアタイプの紫外線照射装置(Fusion LH-6 出力100%、コンベア速度17.8m/分)を用い、前記アクリル樹脂フィルム側から300~390nmの積算光量が、1300mJ/cm2の紫外線を照射することで、上から、保護フィルム/カチオン重合性接着剤層/偏光子/カチオン重合性接着剤層/保護フィルムとの構成を有する偏光板を得た。
攪拌機、還流冷却器、温度計、滴下漏斗及び窒素ガス導入口を備えた反応容器に芳香族グリシジルエーテル(A)として、EPICLON EXA-830CRPを100質量部、2個以上のオキセタニル基を有するオキセタン化合物(B)として、アロンオキセタンOXT-221を200質量部、脂環エポキシ化合物(C)として、セロキサイド3000を200質量部、カチオン重合開始剤(D)として、ジフェニル-4-(フェニルチオ)フェニルスルホニウムヘキサフルオロホスフェートのプロピレンカーボネート50質量%溶液を40質量部を、混合、攪拌することによって、粘度24mPa・s(25℃)のカチオン重合性接着剤を調製した。
アクリル樹脂フィルムと、TACフィルムのそれぞれ片表面に、得られたカチオン重合性接着剤を、ワイヤーバーを用いて約2μmの厚みになるようにそれぞれ塗布し、該塗布基材を、前記偏光子(偏光フィルム)の両面に、それぞれ貼り合わせた。次いで、ゴムローラーを用いて加圧した後、コンベアタイプの紫外線照射装置(Fusion LH-6 出力100%、コンベア速度17.8m/分)を用い、前記アクリル樹脂フィルム側300~390nmの積算光量が、1300mJ/cm2の紫外線を照射することで、上から、保護フィルム/カチオン重合性接着剤層/偏光子/カチオン重合性接着剤層/保護フィルムとの構成を有する偏光板を得た。
攪拌機、還流冷却器、温度計、滴下漏斗及び窒素ガス導入口を備えた反応容器に芳香族グリシジルエーテル(A)として、EPICLON EXA-830CRPを100質量部、2個以上のオキセタニル基を有するオキセタン化合物(B)として、アロンオキセタンOXT-221を237.5質量部、脂環エポキシ化合物(C)として、セロキサイド3000を162.5質量部、カチオン重合開始剤(D)として、ジフェニル-4-(フェニルチオ)フェニルスルホニウムヘキサフルオロホスフェートのプロピレンカーボネート50質量%溶液を40質量部を、混合、攪拌することによって、粘度24mPa・s(25℃)のカチオン重合性接着剤を調製した。
アクリル樹脂フィルムと、TACフィルムのそれぞれ片表面に、得られたカチオン重合性接着剤を、ワイヤーバーを用いて約2μmの厚みになるようにそれぞれ塗布し、該塗布基材を、前記偏光子(偏光フィルム)の両面に、それぞれ貼り合わせた。次いで、ゴムローラーを用いて加圧した後、コンベアタイプの紫外線照射装置(Fusion LH-6 出力100%、コンベア速度17.8m/分)を用い、アクリル樹脂フィルム側から300~390nmの積算光量が、1300mJ/cm2の紫外線を照射することで、上から、保護フィルム/カチオン重合性接着剤層/偏光子/カチオン重合性接着剤層/保護フィルムとの構成を有する偏光板を得た。
攪拌機、還流冷却器、温度計、滴下漏斗及び窒素ガス導入口を備えた反応容器に芳香族グリシジルエーテル(A)として、EPICLON EXA-830CRPを100質量部、2個以上のオキセタニル基を有するオキセタン化合物(B)として、アロンオキセタンOXT-221を225質量部、脂環エポキシ化合物(C)として、セロキサイド3000を125質量部、カチオン重合開始剤(D)として、ジフェニル-4-(フェニルチオ)フェニルスルホニウムヘキサフルオロホスフェートのプロピレンカーボネート50質量%溶液を40質量部、エポキシ基含有シランカップリング剤(E)として、2-(3,4-エポキシシクロヘキシルエチルトリメトキシシラン)を50質量部を、混合、攪拌することによって、粘度24mPa・s(25℃)のカチオン重合性接着剤を調製した。
アクリル樹脂フィルムと、TACフィルムのそれぞれ片表面に、得られたカチオン重合性接着剤を、ワイヤーバーを用いて約2μmの厚みになるようにそれぞれ塗布し、該塗布基材を、前記偏光子(偏光フィルム)の両面に、それぞれ貼り合わせた。次いで、ゴムローラーを用いて加圧した後、コンベアタイプの紫外線照射装置(Fusion LH-6 出力100%、コンベア速度17.8m/分)を用い、前記アクリル樹脂フィルム側から300~390nmの積算光量が、1300mJ/cm2の紫外線を照射することで、上から、保護フィルム/カチオン重合性接着剤層/偏光子/カチオン重合性接着剤層/保護フィルムとの構成を有する偏光板を得た。
攪拌機、還流冷却器、温度計、滴下漏斗及び窒素ガス導入口を備えた反応容器に芳香族グリシジルエーテル(A)として、EPICLON EXA-830CRPを100質量部、2個以上のオキセタニル基を有するオキセタン化合物(B)として、アロンオキセタンOXT-221を350質量部、脂環エポキシ化合物(C)として、セロキサイド3000を50質量部、カチオン重合開始剤(D)として、ジフェニル-4-(フェニルチオ)フェニルスルホニウムヘキサフルオロホスフェートのプロピレンカーボネート50質量%溶液を40質量部を、混合、攪拌することによって、粘度24mPa・s(25℃)のカチオン重合性接着剤を調製した。
アクリル樹脂フィルムと、TACフィルムのそれぞれ片表面に、得られたカチオン重合性接着剤を、ワイヤーバーを用いて約2μmの厚みになるようにそれぞれ塗布し、該塗布基材を、前記偏光子(偏光フィルム)の両面に、それぞれ貼り合わせた。次いで、ゴムローラーを用いて加圧した後、コンベアタイプの紫外線照射装置(Fusion LH-6 出力100%、コンベア速度17.8m/分)を用い、前記アクリル樹脂フィルム側から300~390nmの積算光量が、1300mJ/cm2の紫外線を照射することで、上から、保護フィルム/カチオン重合性接着剤層/偏光子/カチオン重合性接着剤層/保護フィルムとの構成を有する偏光板を得た。
攪拌機、還流冷却器、温度計、滴下漏斗及び窒素ガス導入口を備えた反応容器に芳香族グリシジルエーテル(A)として、EPICLON EXA-830CRPを100質量部、2個以上のオキセタニル基を有するオキセタン化合物(B)として、アロンオキセタンOXT-221を375質量部、脂環エポキシ化合物(C)として、セロキサイド3000を25質量部、カチオン重合開始剤(D)として、ジフェニル-4-(フェニルチオ)フェニルスルホニウムヘキサフルオロホスフェートのプロピレンカーボネート50質量%溶液を40質量部を、混合、攪拌することによって、粘度25mPa・s(25℃)のカチオン重合性接着剤を調製した。
アクリル樹脂フィルムと、TACフィルムのそれぞれ片表面に、得られたカチオン重合性接着剤を、ワイヤーバーを用いて約2μmの厚みになるようにそれぞれ塗布し、該塗布基材を、前記偏光子(偏光フィルム)の両面に、それぞれ貼り合わせた。次いで、ゴムローラーを用いて加圧した後、コンベアタイプの紫外線照射装置(Fusion LH-6 出力100%、コンベア速度17.8m/分)を用い、前記アクリル樹脂フィルム側から300~390nmの積算光量が、1300mJ/cm2の紫外線を照射することで、上から、保護フィルム/カチオン重合性接着剤層/偏光子/カチオン重合性接着剤層/保護フィルムとの構成を有する偏光板を得た。
攪拌機、還流冷却器、温度計、滴下漏斗及び窒素ガス導入口を備えた反応容器に芳香族グリシジルエーテル(A)として、EPICLON EXA-830CRPを100質量部、2個以上のオキセタニル基を有するオキセタン化合物(B)として、アロンオキセタンOXT-221を400質量部、カチオン重合開始剤(D)として、ジフェニル-4-(フェニルチオ)フェニルスルホニウムヘキサフルオロホスフェートのプロピレンカーボネート50質量%溶液を40質量部を、混合、攪拌することによって、粘度24mPa・s(25℃)のカチオン重合性接着剤を調製した。
アクリル樹脂フィルムと、TACフィルムのそれぞれ片表面に、得られたカチオン重合性接着剤を、ワイヤーバーを用いて約2μmの厚みになるようにそれぞれ塗布し、該塗布基材を、前記偏光子(偏光フィルム)の両面に、それぞれ貼り合わせた。次いで、ゴムローラーを用いて加圧した後、コンベアタイプの紫外線照射装置(Fusion LH-6 出力100%、コンベア速度17.8m/分)を用い、前記アクリル樹脂フィルム側から300~390nmの積算光量が、1300mJ/cm2の紫外線を照射することで、上から、保護フィルム/カチオン重合性接着剤層/偏光子/カチオン重合性接着剤層/保護フィルムとの構成を有する偏光板を得た。
攪拌機、還流冷却器、温度計、滴下漏斗及び窒素ガス導入口を備えた反応容器に芳香族グリシジルエーテル(A)として、EPICLON EXA-830CRPを100質量部、2個以上のオキセタニル基を有するオキセタン化合物(B)として、アロンオキセタンOXT-221を395質量部、脂環エポキシ化合物(C)として、セロキサイド3000を5質量部、カチオン重合開始剤(D)として、ジフェニル-4-(フェニルチオ)フェニルスルホニウムヘキサフルオロホスフェートのプロピレンカーボネート50質量%溶液を40質量部を、混合、攪拌することによって、粘度25mPa・s(25℃)のカチオン重合性接着剤を調製した。
アクリル樹脂フィルムと、TACフィルムのそれぞれ片表面に、得られたカチオン重合性接着剤を、ワイヤーバーを用いて約2μmの厚みになるようにそれぞれ塗布し、該塗布基材を、前記偏光子(偏光フィルム)の両面に、それぞれ貼り合わせた。次いで、ゴムローラーを用いて加圧した後、コンベアタイプの紫外線照射装置(Fusion LH-6 出力100%、コンベア速度17.8m/分)を用い、前記アクリル樹脂フィルム側から300~390nmの積算光量が、1300mJ/cm2の紫外線を照射することで、上から、保護フィルム/カチオン重合性接着剤層/偏光子/カチオン重合性接着剤層/保護フィルムとの構成を有する偏光板を得た。
攪拌機、還流冷却器、温度計、滴下漏斗及び窒素ガス導入口を備えた反応容器に芳香族グリシジルエーテル(A)として、EPICLON EXA-830CRPを100質量部、2個以上のオキセタニル基を有するオキセタン化合物(B)として、アロンオキセタンOXT-221を100質量部、脂環エポキシ化合物(C)として、セロキサイド3000を300質量部、カチオン重合開始剤(D)として、ジフェニル-4-(フェニルチオ)フェニルスルホニウムヘキサフルオロホスフェートのプロピレンカーボネート50質量%溶液を40質量部を、混合、攪拌することによって、粘度23mPa・s(25℃)のカチオン重合性接着剤を調製した。
アクリル樹脂フィルムと、TACフィルムのそれぞれ片表面に、得られたカチオン重合性接着剤を、ワイヤーバーを用いて約2μmの厚みになるようにそれぞれ塗布し、該塗布基材を、前記偏光子(偏光フィルム)の両面に、それぞれ貼り合わせた。次いで、ゴムローラーを用いて加圧した後、コンベアタイプの紫外線照射装置(Fusion LH-6 出力100%、コンベア速度17.8m/分)を用い、前記アクリル樹脂フィルム側から300~390nmの積算光量が、1300mJ/cm2の紫外線を照射することで、上から、保護フィルム/カチオン重合性接着剤層/偏光子/カチオン重合性接着剤層/保護フィルムとの構成を有する偏光板を得た。
攪拌機、還流冷却器、温度計、滴下漏斗及び窒素ガス導入口を備えた反応容器に芳香族グリシジルエーテル(A)として、EPICLON EXA-830CRPを100質量部、2個以上のオキセタニル基を有するオキセタン化合物(B)として、アロンオキセタンOXT-221を50質量部、脂環エポキシ化合物(C)として、セロキサイド3000を400質量部、カチオン重合開始剤(D)として、ジフェニル-4-(フェニルチオ)フェニルスルホニウムヘキサフルオロホスフェートのプロピレンカーボネート50質量%溶液を40質量部を、混合、攪拌することによって、粘度22mPa・s(25℃)のカチオン重合性接着剤を調製した。
アクリル樹脂フィルムと、TACフィルムのそれぞれ片表面に、得られたカチオン重合性接着剤を、ワイヤーバーを用いて約2μmの厚みになるようにそれぞれ塗布し、該塗布基材を、前記偏光子(偏光フィルム)の両面に、それぞれ貼り合わせた。次いで、ゴムローラーを用いて加圧した後、コンベアタイプの紫外線照射装置(Fusion LH-6 出力100%、コンベア速度17.8m/分)を用い、前記アクリル樹脂フィルム側から300~390nmの積算光量が、1300mJ/cm2の紫外線を照射することで、上から、保護フィルム/カチオン重合性接着剤層/偏光子/カチオン重合性接着剤層/保護フィルムとの構成を有する偏光板を得た。
攪拌機、還流冷却器、温度計、滴下漏斗及び窒素ガス導入口を備えた反応容器に芳香族グリシジルエーテル(A)として、EPICLON EXA-830CRPを100質量部、脂環エポキシ化合物(C)として、セロキサイド3000を400質量部、カチオン重合開始剤(D)として、ジフェニル-4-(フェニルチオ)フェニルスルホニウムヘキサフルオロホスフェートのプロピレンカーボネート50質量%溶液を40質量部を、混合、攪拌することによって、粘度22mPa・s(25℃)のカチオン重合性接着剤を調製した。
アクリル樹脂フィルムと、TACフィルムのそれぞれ片表面に、得られたカチオン重合性接着剤を、ワイヤーバーを用いて約2μmの厚みになるようにそれぞれ塗布し、該塗布基材を、前記偏光子(偏光フィルム)の両面に、それぞれ貼り合わせた。次いで、ゴムローラーを用いて加圧した後、コンベアタイプの紫外線照射装置(Fusion LH-6 出力100%、コンベア速度17.8m/分)を用い、前記アクリル樹脂フィルム側から300~390nmの積算光量が、1300mJ/cm2の紫外線を照射することで、上から、保護フィルム/カチオン重合性接着剤層/偏光子/カチオン重合性接着剤層/保護フィルムとの構成を有する偏光板を得た。
接着強度の評価は、下記2つの項目で評価した。
実施例及び比較例で得られた偏光板を縦80mm、横25mm幅に裁断したものを試験片とした。該試験片のアクリル樹脂フィルム側を被着体であるアルミ板に、粘着剤No.5601(日東電工(株)製)で貼り付け、端部の偏光子とTACフィルムを貼り合せた積層部分をアクリル樹脂フィルム側から剥がし、JIS Z-0237に準拠して、10mm/minの速度、23℃、50%RHの雰囲気下で90度剥離強度を測定した。
なお、90度剥離強度が、
3N/25mm以上であるものを、「○」、
1.5N/25mm以上3N/25mm未満であるものを、「△」、
1.5N/25mm未満であるものを、「×」、
と評価した。
前記90度剥離強度の試験後の剥離面を目視観察して以下のように判断した。
CF:カチオン重合性接着剤層の凝集破壊、
AF:アクリル樹脂フィルムからのカチオン重合性接着剤層の剥離、
なお、CFであるものは、カチオン重合性接着剤層の破壊であり、カチオン重合性接着剤がアクリル樹脂フィルムと接着しているため、アクリル樹脂フィルムに対する接着強度が良好であると判断し、「○」とした。
また、AFであるものは、カチオン重合性接着剤層が、アクリル樹脂フィルムから剥離しているため、アクリル樹脂フィルムに対する接着強度が不良であると判断し、「×」とした。
「EPICLON EXA-830CRP」;ビスフェノールFジグリシジルエーテル
「アロンオキセタンOXT-221」;ビス[1-エチル(3-オキセタニル)]メチルエーテル
「セロキサイド3000」;1,2:8,9-ジエポキシリモネン
「KBM-303」;2-(3,4-エポキシシクロヘキシル)エチルトリメトキシシラン
一方、比較例1は、脂環エポキシ化合物を含有しない態様であるが、接着強度が不良であることが分かった。
また、比較例2ないし4は、オキセタン化合物及び脂環エポキシ化合物の質量割合が、本発明において規定する範囲を外れる態様であるが、いずれも接着強度が不良であることが分かった。
また、比較例5は、オキセタン化合物を含有しない態様であるが、接着強度が不良であることが分かった。
Claims (9)
- 前記芳香族グリシジルエーテル(A)が、2個以上のグリシジルエーテル基を有するものである請求項1記載のカチオン重合性接着剤。
- 前記芳香族グリシジルエーテル(A)が、ビスフェノールAジグリシジルエーテル及びビスフェノールFジグリシジルエーテルからなる群より選ばれる1種以上である請求項2記載のカチオン重合性接着剤。
- 前記オキセタン化合物(B)の分子量が100~800の範囲である請求項1記載のカチオン重合性接着剤。
- 前記オキセタン化合物(B)が、ビス[1-エチル(3-オキセタニル)]メチルエーテルである請求項4記載のカチオン重合性接着剤。
- 前記脂環エポキシ化合物(C)が、1,2:8,9-ジエポキシリモネンである請求項1記載のカチオン重合性接着剤。
- 更にエポキシ基を有するシランカップリング剤(E)を含有する請求項1記載のカチオン重合性接着剤。
- 前記エポキシ基を有するシランカップリング剤(E)が、2-(3,4-エポキシシクロヘキシル)エチルトリエトキシシラン、2-(3,4-エポキシシクロヘキシル)エチルトリメトキシシラン、3-グリシドキシプロピルトリメトキシシラン及び3-グリシドキシプロピルトリエトキシシランからなる群より選ばれる1種以上である請求項7記載のカチオン重合性接着剤。
- 保護フィルムと偏光子とがカチオン重合性接着剤を介して接着された偏光板であって、前記カチオン重合性接着剤が請求項1~8のいずれか1項記載のカチオン重合性接着剤であることを特徴とする偏光板。
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JP2012543064A JP5229433B2 (ja) | 2011-04-19 | 2012-02-20 | カチオン重合性接着剤及びそれを用いて得られた偏光板 |
CN201280008564.9A CN103354831B (zh) | 2011-04-19 | 2012-02-20 | 阳离子聚合性胶粘剂及使用它得到的偏振板 |
KR1020137011139A KR20130141503A (ko) | 2011-04-19 | 2012-02-20 | 양이온 중합성 접착제 및 그것을 사용하여 얻어진 편광판 |
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JP2014505274A (ja) * | 2011-10-14 | 2014-02-27 | エルジー・ケム・リミテッド | 両面型偏光板及びこれを含む光学装置 |
WO2014129261A1 (ja) * | 2013-02-22 | 2014-08-28 | Dic株式会社 | カチオン重合性接着剤 |
JP2015518574A (ja) * | 2013-02-21 | 2015-07-02 | エルジー・ケム・リミテッド | 両面型偏光板の製造方法及びこれにより製造された両面型偏光板 |
US9487685B2 (en) | 2011-10-14 | 2016-11-08 | Lg Chem, Ltd. | Adhesive for polarizing plate and polarizing plate including the same |
JP2016204454A (ja) * | 2015-04-17 | 2016-12-08 | 東京応化工業株式会社 | 接着剤組成物、積層体、積層体の製造方法 |
US9523792B2 (en) | 2011-10-14 | 2016-12-20 | Lg Chem, Ltd. | Polarizer having protection films in two sides and optical device comprising the same |
JP2021155514A (ja) * | 2020-03-26 | 2021-10-07 | 三菱ケミカル株式会社 | 活性エネルギー線硬化性接着剤組成物、偏光板用接着剤組成物、偏光板用接着剤、およびそれを用いた偏光板 |
Families Citing this family (1)
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WO2017170879A1 (ja) * | 2016-03-31 | 2017-10-05 | 株式会社Adeka | 硬化性組成物、硬化物の製造方法、およびその硬化物 |
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2012
- 2012-02-20 JP JP2012543064A patent/JP5229433B2/ja not_active Expired - Fee Related
- 2012-02-20 CN CN201280008564.9A patent/CN103354831B/zh not_active Expired - Fee Related
- 2012-02-20 KR KR1020137011139A patent/KR20130141503A/ko not_active Application Discontinuation
- 2012-02-20 WO PCT/JP2012/053923 patent/WO2012144260A1/ja active Application Filing
- 2012-04-18 TW TW101113691A patent/TW201249945A/zh unknown
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JP2014505274A (ja) * | 2011-10-14 | 2014-02-27 | エルジー・ケム・リミテッド | 両面型偏光板及びこれを含む光学装置 |
JP2016040611A (ja) * | 2011-10-14 | 2016-03-24 | エルジー・ケム・リミテッド | 両面型偏光板及びこれを含む光学装置 |
US9487685B2 (en) | 2011-10-14 | 2016-11-08 | Lg Chem, Ltd. | Adhesive for polarizing plate and polarizing plate including the same |
US9523792B2 (en) | 2011-10-14 | 2016-12-20 | Lg Chem, Ltd. | Polarizer having protection films in two sides and optical device comprising the same |
JP2015518574A (ja) * | 2013-02-21 | 2015-07-02 | エルジー・ケム・リミテッド | 両面型偏光板の製造方法及びこれにより製造された両面型偏光板 |
US9766383B2 (en) | 2013-02-21 | 2017-09-19 | Lg Chem, Ltd. | Method of manufacturing double-sided polarizing plate and double-sided polarizing plate manufactured using the same |
WO2014129261A1 (ja) * | 2013-02-22 | 2014-08-28 | Dic株式会社 | カチオン重合性接着剤 |
JP2016204454A (ja) * | 2015-04-17 | 2016-12-08 | 東京応化工業株式会社 | 接着剤組成物、積層体、積層体の製造方法 |
JP2021155514A (ja) * | 2020-03-26 | 2021-10-07 | 三菱ケミカル株式会社 | 活性エネルギー線硬化性接着剤組成物、偏光板用接着剤組成物、偏光板用接着剤、およびそれを用いた偏光板 |
JP7363631B2 (ja) | 2020-03-26 | 2023-10-18 | 三菱ケミカル株式会社 | 活性エネルギー線硬化性接着剤組成物、偏光板用接着剤組成物、偏光板用接着剤、およびそれを用いた偏光板 |
Also Published As
Publication number | Publication date |
---|---|
JP5229433B2 (ja) | 2013-07-03 |
JPWO2012144260A1 (ja) | 2014-07-28 |
KR20130141503A (ko) | 2013-12-26 |
TW201249945A (en) | 2012-12-16 |
CN103354831A (zh) | 2013-10-16 |
CN103354831B (zh) | 2016-03-02 |
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