WO2006009250A1 - 偏光板用粘着剤組成物および偏光板 - Google Patents
偏光板用粘着剤組成物および偏光板 Download PDFInfo
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- WO2006009250A1 WO2006009250A1 PCT/JP2005/013486 JP2005013486W WO2006009250A1 WO 2006009250 A1 WO2006009250 A1 WO 2006009250A1 JP 2005013486 W JP2005013486 W JP 2005013486W WO 2006009250 A1 WO2006009250 A1 WO 2006009250A1
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- weight
- polarizing plate
- sensitive adhesive
- pressure
- adhesive composition
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J133/02—Homopolymers or copolymers of acids; Metal or ammonium salts thereof
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J133/04—Homopolymers or copolymers of esters
- C09J133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C09J133/08—Homopolymers or copolymers of acrylic acid esters
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J133/04—Homopolymers or copolymers of esters
- C09J133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J133/04—Homopolymers or copolymers of esters
- C09J133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C09J133/10—Homopolymers or copolymers of methacrylic acid esters
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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
- 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
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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
- G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
- G02F1/133311—Environmental protection, e.g. against dust or humidity
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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
- G02F1/133528—Polarisers
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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
- G02F2202/00—Materials and properties
- G02F2202/28—Adhesive materials or arrangements
Definitions
- the present invention relates to a pressure-sensitive adhesive composition for polarizing plates and a polarizing plate. More specifically, it has a pressure-sensitive adhesive composition that can relieve stress due to a dimensional change of a polarizing plate used in a liquid crystal element or the like and suppress light leakage, color unevenness, and the like, and a layer made of the pressure-sensitive adhesive composition. It relates to a polarizing plate.
- a liquid crystal element of a liquid crystal display device has a structure in which a liquid crystal component oriented in a predetermined direction is sandwiched between two substrates, and the surface of this substrate has a polarizing plate and a phase difference between the polarizing plate and the polarizing plate.
- a laminate with a plate is stuck via an adhesive layer.
- liquid crystal elements are suitable for reducing the weight and thickness of display devices, they have been widely used in recent years as display devices for in-vehicle televisions, in-vehicle navigation system displays, personal computer displays, wall-mounted TVs, outdoor measuring instruments, etc. It has been used in the field, and accompanying this, the usage environment has become very severe.
- a polarizing plate (film) used in a liquid crystal element has a three-layer structure in which a triacetate-based protective film is laminated on both sides of a polybutyl alcohol-based polarizer. Under the conditions, the dimensional change of the polarizing plate occurs, and foaming tends to occur with this dimensional change. For this reason, the pressure-sensitive adhesive for attaching the polarizing plate to the retardation plate or substrate is improved so that it can withstand use under harsh conditions by increasing the molecular weight or increasing the degree of crosslinking. Attempts have been made (see, for example, Patent Document 1).
- Patent Document 1 Japanese Patent Laid-Open No. 3-12471
- Patent Document 2 JP 2000-109771 A
- An object of the present invention is to provide a pressure-sensitive adhesive composition for a polarizing plate, which has excellent optical characteristics and durability, can relieve stress due to dimensional change of the polarizing plate, etc., and can suppress light leakage and color unevenness, and the like. It is providing the polarizing plate which has an adhesive layer which consists of an adhesive composition. Means for solving the problem
- the present inventors have conducted intensive research in view of the above problems.
- an adhesive composition capable of solving the above problems can be obtained by blending a small amount of a crosslinking agent and a silane coupling agent with an acrylic copolymer comprising a specific monomer component.
- the pressure-sensitive adhesive composition for polarizing plates according to the present invention comprises, as a monomer component, (al) (meth) acrylic acid ester 10 to 79.9 wt%, and (a2) a benzene ring-containing compound 20 to 80 wt.
- (a3) functional group-containing compound 0.1 to 10% by weight, a benzene ring content of 10% by weight or more, and a weight-average molecular weight of 800,000 to 2,000,000 (A) It contains 0.01 to 0.3 parts by weight of a crosslinking agent (B) and 0.01 to 0.5 parts by weight of a silane coupling agent (C) with respect to 100 parts by weight. To do.
- the polarizing plate according to the present invention is characterized in that the pressure-sensitive adhesive layer made of the pressure-sensitive adhesive composition for polarizing plates is formed on at least one surface of the polarizing plate.
- the pressure-sensitive adhesive layer comprising the pressure-sensitive adhesive composition for polarizing plates of the present invention has a storage elastic modulus (G, l) at 23 ° C. of 1.0 ⁇ 10 5 Pa or less and a storage elastic modulus at 80 ° C. (G ′ 2) is 5.0 ⁇ 10 4 Pa or less.
- the ratio (G'lZG'2) between the storage elastic modulus (G'l) and (G'2) is preferably more than 1.5 to 5 or less.
- the pressure-sensitive adhesive layer made of the pressure-sensitive adhesive composition of the present invention is excellent in optical properties and durability, and is resistant to dimensional changes of the polarizing plate even under severe use conditions such as in a high-temperature and high-humidity atmosphere. It has excellent stress relaxation properties and can suppress the occurrence of light leakage, uneven color, and peeling.
- the pressure-sensitive adhesive composition for polarizing plates according to the present invention contains an acrylic copolymer (A) comprising a specific monomer component, a crosslinking agent (B), and a silane coupling agent (C).
- A acrylic copolymer
- B crosslinking agent
- C silane coupling agent
- the acrylic copolymer (A) used in the present invention includes, as monomer components, (meth) acrylate ester (al), a benzene ring-containing compound (a2) copolymerizable with (al), and ( al) and / or a functional group-containing compound (a3) copolymerizable with (a2).
- Examples of the (meth) acrylic acid ester (al) include methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, n-butyl (meth) acrylate, iso -Butyl (meth) acrylate, 2-ethyl hexyl (meth) acrylate, n-octyl (meth) acrylate, iso-octyl (meth) acrylate, laurinore (meth) atelate, stearino ret (meta) ateari
- Examples thereof include acrylate, cyclohexyl (meth) acrylate, methoxyethyl (meth) acrylate and ethoxymethyl (meth) acrylate.
- a benzene ring-containing (meth) acrylic acid ester is preferred, for example, benzyl (meth) acrylate, benzyloxetyl (meth) acrylate, phenoxy.
- examples thereof include sidiethylene glycol (meth) acrylate, phenoxychetyl (meth) acrylate, ethylene oxide modified talesol (meth) acrylate, ethylene oxide modified nourphenol (meth) acrylate.
- Examples of the functional group-containing compound include compounds having a functional group that undergoes a crosslinking reaction with the crosslinking agent (B), such as (meth) acrylic acid, j3-carboxyethyl acrylate, itaconic acid, crotonic acid, Carboxylic group-containing compounds such as maleic acid, fumaric acid and maleic anhydride; 2-hydroxyethyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, black 2-hydroxypropyl acrylate, diethylene glycol mono ( Hydroxyl group-containing compounds such as meth) arylates and aryl alcohols; Epoxy group-containing compounds such as glycidyl (meth) acrylates; Amino group-containing compounds such as aminomethinolate (meth) acrylates and dimethylaminoethinolate (meth) acrylates ; (Meth) acrylamide, N-methylol (meth) a Examples thereof include amide group-containing
- the acrylic copolymer (A) used in the present invention may be copolymerized with other monomers as long as the object of the present invention is not impaired.
- examples of such other monomers include butyl acetate, styrene, methyl styrene, butyl toluene, (meth) acrylonitrile, and the like.
- the acrylic copolymer (A) used in the present invention can be synthesized by a conventionally known polymerization method such as solution polymerization, emulsion polymerization, suspension polymerization, bulk polymerization and the like.
- each monomer component in the acrylic polymer (A) is 10-79.% Of the component (al) with respect to a total of 100% by weight of the monomer components (al), (a2) and (a3).
- 9 layers The amount 0/0, preferably from 25 to 69.9 weight 0/0, and particularly preferably 27 to 60.5 wt%, the component (a2) 20 to 80 weight 0/0, preferably from 30 to 70 weight 0/0, particularly preferably 40 to 60 by weight%, the component (a3) is 0.:! ⁇ 10 wt%, preferably from 0.1:! ⁇ 5 wt%, especially good Mashiku 0.5 ⁇ 3% by weight.
- the content of the other monomer component is 0 to 15% by weight, preferably 0 to 10% with respect to the total of 100% by weight of the monomer components (al), (a2) and (a3). % By weight.
- the acrylic copolymer (A) has a benzene ring content of 10% by weight or more, preferably 15 to 50% by weight, particularly preferably 20 to 40% by weight.
- the storage elastic modulus of the pressure-sensitive adhesive composition described later can be set to a specific range, and a pressure-sensitive adhesive composition having excellent stress relaxation properties can be obtained.
- the benzene ring content is a value calculated by the following formula (1).
- Ml is the molecular weight of the monomer component (al)
- M2 is the amount of the monomer component (a2).
- M3 is the molecular weight of monomer component (a3)
- Y1 is the content of monomer component (al) ( %)
- Y2 is the content (% by weight) of the monomer component (a2)
- Y3 is the content (% by weight) of the monomer component (a3).
- the acrylic copolymer (A) has a weight average molecular weight (Mw) of 800,000 to 2,000,000, preferably 1,000,000 to 1,800,000, particularly preferably 1,000,000 to 1,500,000. .
- Mw weight average molecular weight
- the weight average molecular weight is a value determined by polystyrene conversion in gel permeation chromatography (GPC) method.
- crosslinking agent (B) used in the present invention examples include isocyanate compounds, epoxy compounds, amine compounds, metal chelate compounds, and aziridine compounds. Of these, isocyanate compounds are preferred.
- isocyanate compounds examples include isocyanates such as tolylene diisocyanate, chlorphenate, isophorone diisocyanate, xylylene diisocyanate, diphenylenemethane diisocyanate, and hydrogenated diphenylmethane diisocyanate.
- isocyanates such as tolylene diisocyanate, chlorphenate, isophorone diisocyanate, xylylene diisocyanate, diphenylenemethane diisocyanate, and hydrogenated diphenylmethane diisocyanate.
- examples thereof include urethane prepolymer type isocyanate obtained by addition reaction of polyol and
- Examples of the epoxy compound include ethylene glycol glycidyl ether, polyethylene glycol diglycidyl ether, glycerin diglycidyl ether, glycerin triglycidinole ether, 1,3-bis (N, N-diglycidylaminomethyl).
- Examples of the amine compound include hexamethylenediamine, triethyldiamine, polyethyleneimine, hexamethylenetetramine, diethylenetriamine, triethyltetramine, isophoronediamine, amino.
- Examples thereof include resins and methylene resins.
- Examples of the metal chelate compound include polyvalent metals such as aluminum, iron, copper, zinc, tin, titanium, nickelo, antimony, magnesium, vanadium, chromium and zirconium distributed to acetylacetone and acetyl acetate. The ability to cite compounds
- aziridine compounds examples include diphenylmethane-4,4'-bis (1-aziridincarboxamide), trimethylolpropane tri-aziridinylpropionate, tetramethylolmethanetri- Lysinyl propionate, toluene-2,4-bis (1-aziridincarboxamide), triethylenemelamine, bisisophthaloyl-1- (2-methylaziridine), tris-1- (2-methylaziridine ) Phosphine, trimethylolpropane tri- (2-methylaziridine) propionate and the like.
- the crosslinking agent (B) may be used alone or in combination of two or more.
- the amount of the cross-linking agent (B) is 0.01 to 0.3 parts by weight, preferably 0.01 to 0.2 parts by weight, particularly preferably 0 to 100 parts by weight of the acrylic copolymer. 01-0. 1 part by weight.
- the viscoelastic characteristics described later can be secured, the stress due to the dimensional change of the polarizing plate can be relaxed, light leakage and color unevenness can be prevented, and durability can be improved.
- An excellent pressure-sensitive adhesive composition can be obtained. If the blending amount of the cross-linking agent (B) exceeds the above range, the storage elastic modulus increases, the stress relaxation effect due to the dimensional change of the polarizing plate cannot be obtained sufficiently, and the light leakage cannot be improved. If the amount is less than the above range, durability may not be sufficiently obtained.
- silane coupling agent (C) used in the present invention examples include polymerizability such as butyltrimethoxysilane, biertriethoxysilane, and methacryloxypropyltrimethoxysilane.
- Unsaturated group-containing key compounds key compounds having an epoxy structure such as 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, 2_ (3,4-epoxycyclohexyl) ethyltrimethoxysilane; Amino group-containing silicon compounds such as 3-aminopropyltrimethoxysilane, N_ (2_aminoethyl) 3-aminopropyltrimethoxysilane, N_ (2_aminoethyl) 3-aminopropylmethyldimethoxysilane; and 3 -Black mouth prop
- the silane coupling agent (C) may be used singly or in combination of two or more.
- the amount of the silane coupling agent (C) is 0.01 to 0.5 parts by weight, preferably 0.05 to 0.3 parts by weight, based on 100 parts by weight of the acrylic polymer (A). Particularly preferred is 0.05 to 0.2 parts by weight.
- the polarizing plate pressure-sensitive adhesive composition of the present invention can be produced by mixing the acrylic copolymer (A), the crosslinking agent (B), and the silane coupling agent (C) in an amount within the above range. it can.
- the pressure-sensitive adhesive composition of the present invention includes an ultraviolet absorber, an antioxidant, an antiseptic, an antifungal agent, a tackifier resin, a plasticizer, and an antifoam as long as transparency, visibility, and the effects of the present invention are not impaired. You may mix
- the pressure-sensitive adhesive layer made of the pressure-sensitive adhesive composition for polarizing plates is formed on at least one surface of a polarizing plate (polarizing film).
- polarizing film used in the present invention a conventionally known polarizing film can be used.
- polybulal alcohol-based resins such as polybulal alcohol, polybulal formal, polybular cetal, and the hatching of ethylene.
- Acetic acid bur copolymer contain a polarizing component such as iodine or dichroic dye.
- a protective film such as cellulose triacetate film, polycarbonate film, polyethersulfone film, etc. laminated on the film obtained by stretching the film.
- a layer film or the like can be used.
- the method for forming the pressure-sensitive adhesive layer on such a polarizing plate (film) is not particularly limited.
- the pressure-sensitive adhesive composition is directly applied to the surface of the polarizing plate (film) using a bar coater and dried.
- the pressure-sensitive adhesive layer formed on the surface of the peelable substrate is transferred to the surface of the polarizing film. Then, it is preferable to employ a method of aging.
- the pressure-sensitive adhesive layer thus formed has a dry thickness of usually 10 to 100 zm, preferably 20 to 50 xm.
- the pressure-sensitive adhesive layer only needs to be formed on at least one surface of the polarizing plate (film). Therefore, in the present invention, the pressure-sensitive adhesive layer can be formed on both surfaces of the polarizing plate (film).
- the pressure-sensitive adhesive layer comprising the pressure-sensitive adhesive composition of the present invention has a storage elastic modulus (G ′ 1) at 23 ° C. of 1.0X10 5 Pa or less, preferably ⁇ 5.0X10 3 to 1.0X10 5 Pa, particularly preferably ⁇ . 5.0X1 0 4 to: 1.0X10 5 Pa, and storage elastic modulus (G′2) at 80 ° C. is 5.0X10 4 Pa or less, preferably 1.0X10 3 to 5.0X10 4 Pa, particularly preferably 1.0X1 . 4 to 5.0X10 4 Pa.
- the storage elastic modulus at 23 ° C and 80 ° C is in the above range, it is excellent in stress relaxation against dimensional change of the polarizing plate under the assumed use conditions, so light leakage even under high temperature and high humidity atmosphere. And the occurrence of uneven color can be suppressed.
- the ratio (G'1) / (G'2) of the storage elastic modulus (G'1) and (G'2) is Usually, it is more than 1.5 to 5 or less, preferably more than 1.5 to 4.5 or less, particularly preferably more than 1.5 to 4 or less.
- the ratio of the storage elastic modulus is in the above range, the deformability from room temperature to high temperature is increased, the stress relaxation with respect to dimensional change is excellent, and the occurrence of light leakage and color unevenness can be suppressed.
- the polarizing plate (film) of the present invention may be laminated with layers having other functions such as a protective layer, a reflective layer, and an antiglare layer.
- the pressure-sensitive adhesive layer sufficiently relaxes the thermal stress, and thus light leakage or color unevenness occurs. do not do.
- n-butyl acrylate n-BA
- phenoxydiethylene glycol acrylate 1 part by weight of 4-hydroxybutyl acrylate (4HBA)
- AIBN azobisisoptilo Nitrile
- 1 part by weight is placed in a reaction vessel, the air in the reaction vessel is replaced with nitrogen gas, and the reaction solution is heated to 66 ° C in a nitrogen atmosphere with stirring. Reacted for hours.
- the reaction mixture was diluted with ethyl acetate to obtain an acrylic polymer solution (1) having a solid content of 20% by weight.
- the acrylic copolymer obtained had a weight average molecular weight (Mw) by GPC of 1.1 million.
- Mw weight average molecular weight
- the benzene ring content determined from the above formula (1 ′) was 14% by weight.
- the obtained acrylic copolymer had a weight average molecular weight (Mw) by GP of 1.1 million.
- the benzene ring content determined by the above formula (1 ′) force was 20% by weight.
- the acryl-based polymer solution (3) with a solid content of 20% by weight was prepared in the same manner as in Production Example 1, except that the monomer type and blending ratio were changed to 49 parts by weight of n_BA, 50 parts by weight of benzyl acrylate, and 1 part by weight of 4HBA. Obtained.
- the acrylic copolymer obtained had a weight average molecular weight (Mw) by GPC of 1 million.
- the benzene ring content determined from the above formula (1 ′) was 27% by weight.
- An acrylic polymer solution (4) having a solid content of 20% by weight was obtained in the same manner as in Production Example 1, except that the monomer type and mixing ratio were changed to 99 parts by weight of n-BA and 1 part by weight of 4HBA.
- the weight average molecular weight (Mw) by GPC of the obtained acrylic copolymer was 1.3 million, and no benzene ring-containing compound was used as a monomer component, so the benzene ring content was 0% by weight. .
- the obtained acrylic copolymer had a weight average molecular weight (Mw) by GP of 1.1 million.
- the benzene ring content determined from the above formula (1 ′) was 8% by weight.
- Acrylic polymer solution with a solid content of 20% by weight (6) except that the monomer type and blending ratio were changed to 49 parts by weight of n_BA, 50 parts by weight of cyclohexyl acrylate, and 1 part by weight of 4HBA.
- the weight average molecular weight (Mw) by GPC of the obtained acrylic copolymer is 1.1 million, and no benzene ring-containing compound is used as the monomer component, so the benzene ring content is 0% by weight. there were.
- the solid content was the same as in Production Example 1 except that the monomer mixing ratio was changed to 49 parts by weight of n_BA, 50 parts by weight of phenoxydiethylene glycol atrelate, and 1 part by weight of 4HBA, and the ethyl acetate was changed to 140 parts by weight.
- a weight percent acrylic polymer solution (8) was obtained.
- the acrylic copolymer obtained had a weight average molecular weight (Mw) by GPC of 850,000.
- the benzene ring content determined from the above formula (1 ′) was 20% by weight.
- Acrylic polymer with a solid content of 20% by weight in the same manner as in Production Example 1, except that the monomer type and blending ratio were changed to 49 parts by weight of n-BA, 50 parts by weight of phenoxychetyl acrylate, and 1 part by weight of 4HBA.
- a solution (9) was obtained.
- the acrylic copolymer obtained had a weight average molecular weight (Mw) by GPC of 1 million.
- the benzene ring content determined from the above formula (1 ′) was 27% by weight.
- Acrylic with a solid content of 20% by weight was the same as in Production Example 1, except that the monomer type and mixing ratio were changed to 49 parts by weight of n-BA, 50 parts by weight of benzyloxetyl acrylate and 1 part by weight of 4HBA.
- a polymer solution (10) was obtained.
- the weight average molecular weight (Mw) by GPC of the obtained acrylic copolymer was 1 million.
- the benzene ring content determined from the above formula (1 ′) was 20% by weight.
- the obtained pressure-sensitive adhesive composition was applied to a PET film that had been subjected to silicon release treatment, and dried at 90 ° C for 3 minutes to volatilize the solvent to form a 25 / m pressure-sensitive adhesive layer.
- the PET film with the pressure-sensitive adhesive layer formed thereon was bonded to a polarizing plate and aged for 7 days under conditions of a temperature of 23 ° C and a humidity of 65% to prepare a sample for evaluation.
- a pressure-sensitive adhesive composition was prepared in the same manner as in Example 1 except that the blending ratio of each component of the pressure-sensitive adhesive composition was changed as shown in Table 2, and a sample for evaluation was prepared. [0052] [Table 2]
- the obtained sample for evaluation is allowed to stand for 500 hours under the conditions of 85 ° C and 60 ° C / 95% Rh, and the presence or absence of film peeling or foaming at the adhesive interface is visually observed, and there is no practical problem.
- the state was “ ⁇ ”, the practically problematic state was “ ⁇ ”, and the practically problematic state was “X”.
- the obtained sample for evaluation is allowed to stand for 72 hours at 85 ° C.
- the light leakage caused by the stress was visually observed.
- a state where there was no practical problem was indicated as “ ⁇ ”
- a state where there was a practical problem was indicated as “ ⁇ ”
- a state where there was a practical problem was indicated as “X”.
- the obtained samples for evaluation were measured for storage elastic modulus (frequency 10 Hz) at 23 ° C. and 80 ° C. using “Physica MCR300” manufactured by Anton Paar.
- the pressure-sensitive adhesive composition of the present invention (Examples:! To 7) was excellent in durability performance and light leakage prevention.
- light leakage occurred in the pressure-sensitive adhesive composition made of an acrylic polymer containing no benzene ring-containing compound (Comparative Examples 1 and 3).
- the pressure-sensitive adhesive composition (Comparative Example 2) composed of an acrylic polymer having a low benzene ring content (Comparative Example 2) and a pressure-sensitive adhesive composition (Comparative Example 5) with a high cross-linking agent content are not sufficient. It was. This is thought to be due to the high storage modulus of the adhesive layer at 23 ° C and / or 80 ° C. Sufficient durability cannot be obtained with a crosslinker added to a ladle, a pressure sensitive adhesive composition (Comparative Example 4), and a pressure sensitive adhesive composition without a silane coupling agent (Comparative Example 6). It was.
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JP2006529295A JPWO2006009250A1 (ja) | 2004-07-22 | 2005-07-22 | 偏光板用粘着剤組成物および偏光板 |
ES05761817T ES2388292T3 (es) | 2004-07-22 | 2005-07-22 | Composición adhesiva para lámina polarizante y lámina polarizante |
KR1020077001765A KR100839631B1 (ko) | 2004-07-22 | 2005-07-22 | 편광판 |
US11/632,512 US20080033109A1 (en) | 2004-07-22 | 2005-07-22 | Adhesive Composition For Polarizing Plate And Polarizing Plate |
EP05761817A EP1780561B1 (en) | 2004-07-22 | 2005-07-22 | Adhesive composition for polarizing plate and polarizing plate |
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JP2004-214481 | 2004-07-22 | ||
JP2004214481 | 2004-07-22 |
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PCT/JP2005/013486 WO2006009250A1 (ja) | 2004-07-22 | 2005-07-22 | 偏光板用粘着剤組成物および偏光板 |
Country Status (8)
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US (1) | US20080033109A1 (ja) |
EP (1) | EP1780561B1 (ja) |
JP (1) | JPWO2006009250A1 (ja) |
KR (1) | KR100839631B1 (ja) |
CN (1) | CN100419475C (ja) |
ES (1) | ES2388292T3 (ja) |
TW (1) | TWI306956B (ja) |
WO (1) | WO2006009250A1 (ja) |
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- 2005-07-22 KR KR1020077001765A patent/KR100839631B1/ko not_active IP Right Cessation
- 2005-07-22 WO PCT/JP2005/013486 patent/WO2006009250A1/ja active Application Filing
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Also Published As
Publication number | Publication date |
---|---|
EP1780561A1 (en) | 2007-05-02 |
TWI306956B (en) | 2009-03-01 |
KR20070034601A (ko) | 2007-03-28 |
TW200609545A (en) | 2006-03-16 |
EP1780561B1 (en) | 2012-05-23 |
CN100419475C (zh) | 2008-09-17 |
US20080033109A1 (en) | 2008-02-07 |
ES2388292T3 (es) | 2012-10-11 |
KR100839631B1 (ko) | 2008-06-20 |
JPWO2006009250A1 (ja) | 2008-05-01 |
CN1997921A (zh) | 2007-07-11 |
EP1780561A4 (en) | 2010-12-29 |
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