WO2016152275A1 - 粘着剤層付偏光板およびその製造方法 - Google Patents
粘着剤層付偏光板およびその製造方法 Download PDFInfo
- Publication number
- WO2016152275A1 WO2016152275A1 PCT/JP2016/053466 JP2016053466W WO2016152275A1 WO 2016152275 A1 WO2016152275 A1 WO 2016152275A1 JP 2016053466 W JP2016053466 W JP 2016053466W WO 2016152275 A1 WO2016152275 A1 WO 2016152275A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- meth
- adhesive layer
- polarizing plate
- sensitive adhesive
- pressure
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/002—Priming paints
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J133/04—Homopolymers or copolymers of esters
- 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
- C09J133/10—Homopolymers or copolymers of methacrylic 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
- C09J7/00—Adhesives in the form of films or foils
- C09J7/50—Adhesives in the form of films or foils characterised by a primer layer between the carrier and the adhesive
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
Definitions
- the present invention relates to a polarizing plate with an adhesive layer and a method for producing the same.
- the liquid crystal element has a structure in which a liquid crystal material is sandwiched between two substrates (eg, a glass plate), and a polarizing plate is attached to the surface of the substrate via an adhesive layer.
- the adhesion between the polarizing plate and the adhesive layer is important from the viewpoint of preventing adhesive residue on the glass plate during peeling or re-peeling (maintaining reworkability) and suppressing contamination by the adhesive layer around the work. Is one of the important performances.
- the adhesion between the polarizing plate and the adhesive layer is improved by the adhesion of the adhesive to the punching blade and the adhesion of the adhesive from the end of the polarizing plate to the other polarizing plate after the punching process. Therefore, it is also desired from the viewpoint of improving workability.
- a method for improving the adhesiveness between the polarizing plate and the pressure-sensitive adhesive layer a method of containing an isocyanate-based crosslinking agent in the pressure-sensitive adhesive layer, surface activation such as corona treatment on the side of the polarizing plate on which the pressure-sensitive adhesive layer is formed
- a method of performing the treatment and a method of providing a primer layer (anchor layer) between the polarizing plate and the adhesive layer are known.
- Patent Document 1 discloses an anchor layer containing a polyether-based polyurethane resin
- Patent Document 2 contains a polyoxyalkylene group.
- An anchor layer containing a polymer is disclosed.
- the adhesion between the polarizing plate and the pressure-sensitive adhesive layer is not yet sufficient, and further improvement in adhesion is desired.
- An object of the present invention is to provide a polarizing plate with an adhesive layer having excellent adhesion between the polarizing plate and the adhesive layer, and a method for producing the same.
- the present inventors diligently studied to solve the above problems. As a result, it was found that the above-mentioned problem can be solved when a specific primer layer is provided between the polarizing plate and the pressure-sensitive adhesive layer formed by including the (meth) acrylic copolymer. It came to be completed.
- the present invention includes, for example, the following [1] to [7].
- a polarizing plate with an adhesive layer having excellent adhesion between the polarizing plate and the adhesive layer, and a method for producing the same.
- the polarizing plate with an adhesive layer of the present invention comprises a polarizing plate (A), an adhesive layer (B), and a primer layer (C) between the polarizing plate (A) and the adhesive layer (B).
- A polarizing plate
- B adhesive layer
- C primer layer
- Polarizing plate (A) A conventionally well-known polarizing plate can be used as a polarizing plate (A),
- the polarizing plate which has a polarizer and the polarizer protective film arrange
- polarizing plate is used to include “polarizing film”.
- Examples of the polarizer include a stretched film obtained by adding a polarizing component to a film made of a polyvinyl alcohol resin and stretching the film.
- Examples of the polyvinyl alcohol-based resin include polyvinyl alcohol, polyvinyl formal, polyvinyl acetal, and a saponified product of an ethylene / vinyl acetate copolymer.
- Examples of the polarizing component include iodine and a dichroic dye.
- polarizer protective film examples include films made of cellulose such as triacetyl cellulose and diacetyl cellulose, polycarbonate films, polyether sulfone films, cycloolefin films, acrylic films, and polyester films.
- the thickness of the polarizing plate (A) is usually 10 to 250 ⁇ m, preferably 20 to 200 ⁇ m.
- the pressure-sensitive adhesive layer (B) is formed from a pressure-sensitive adhesive composition.
- the pressure-sensitive adhesive composition contains an acidic functional group-containing (meth) acrylic copolymer described below.
- the said adhesive composition may further contain at least 1 type chosen from a crosslinking agent, a silane coupling agent, an antistatic agent, and an additive as needed.
- the said adhesive composition contains an organic solvent.
- an acidic functional group-containing (meth) acrylic copolymer is also simply referred to as “(meth) acrylic copolymer”.
- the acidic functional group-containing (meth) acrylic copolymer is a copolymer having an acidic functional group introduced therein.
- the (meth) acrylic copolymer is preferably a copolymer of a monomer component containing an acidic functional group-containing monomer, and is preferably obtained by polymerizing the monomer component.
- the monomer component includes a crosslinkable functional group-containing monomer other than an acidic functional group into which a crosslinkable functional group such as a hydroxyl group has been introduced, and a (meth) acrylate alkyl having no crosslinkable functional group Esters and other monomers can also be contained.
- the (meth) acrylic copolymer preferably has a structural unit derived from an acidic functional group-containing monomer.
- the acidic functional group-containing monomer is a monomer having at least one acidic functional group.
- Examples of the acidic functional group include a carboxyl group, an acid anhydride group, a phosphoric acid group, and a sulfuric acid group.
- Examples of the acidic functional group-containing monomer include a carboxyl group-containing monomer, an acid anhydride group-containing monomer, a phosphate group-containing monomer, and a sulfuric acid group-containing monomer.
- carboxyl group-containing monomer examples include ⁇ -carboxyethyl (meth) acrylate, 5-carboxypentyl (meth) acrylate, mono (meth) acryloyloxyethyl succinate and ⁇ -carboxypolycaprolactone mono (meth) acrylate.
- (meth) acrylates such as (meth) acrylic acid, crotonic acid, maleic acid, fumaric acid, itaconic acid and citraconic acid.
- Examples of the acid anhydride group-containing monomer include maleic anhydride and itaconic anhydride.
- Examples of the phosphoric acid group-containing monomer include (meth) acrylic acid ester having a phosphate group in the side chain, and examples of the sulfuric acid group-containing monomer include (meth) acrylic acid ester having a sulfuric acid group in the side chain. Is mentioned.
- the acidic functional group-containing monomer may be used alone or in combination of two or more.
- the adhesive force between the pressure-sensitive adhesive layer (B) and the adherend is improved.
- the content of the acidic functional group-containing monomer is usually 0.1 to 10% by mass, and 0.1 to 7% by mass.
- 0.5 to 6% by mass is more preferable.
- the crosslinkable functional group-containing monomer other than the acidic functional group is a monomer having at least one crosslinkable functional group other than the acidic functional group.
- the said crosslinkable functional group is a functional group which can introduce
- the (meth) acrylic copolymer (A) may have a structural unit derived from a crosslinkable functional group-containing monomer.
- crosslinkable functional group-containing monomer examples include a hydroxyl group-containing monomer.
- hydroxyl group-containing monomer examples include a hydroxyl group-containing (meth) acrylate, and examples include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, 6 And hydroxyalkyl (meth) acrylates such as hydroxyhexyl (meth) acrylate and 8-hydroxyoctyl (meth) acrylate.
- the crosslinkable functional group-containing monomer may be used alone or in combination of two or more.
- the total amount used of the acidic functional group-containing monomer and the crosslinkable functional group-containing monomer other than the acidic functional group is usually 0.1. To 10% by mass, preferably 0.5 to 7% by mass.
- the content of the hydroxyl group-containing monomer is usually 10% by mass or less, preferably 9.9% by mass or less, and more preferably 3% by mass or less. Preferably, 1% by mass or less is more preferable, and 0.1% by mass or less is particularly preferable. When the content of the hydroxyl group-containing monomer is within the above range, it is preferable from the viewpoint of improving pot life, heat resistance, and heat resistance.
- (Meth) acrylic acid alkyl ester As the (meth) acrylic acid alkyl ester, a (meth) acrylic acid alkyl ester having an alkyl group having 1 to 18 carbon atoms (CH 2 ⁇ CR 1 —COOR 2 ; R 1 is a hydrogen atom or a methyl group, R 2 Is an alkyl group having 1 to 18 carbon atoms, and the alkyl group preferably has 4 to 12 carbon atoms.
- the (meth) acrylic copolymer (A) preferably has a structural unit derived from a (meth) acrylic acid alkyl ester.
- Examples of the (meth) acrylic acid alkyl ester having 1 to 18 carbon atoms in the alkyl group include, for example, methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, isopropyl (meth) acrylate, n- Butyl (meth) acrylate, isobutyl (meth) acrylate, tert-butyl (meth) acrylate, n-pentyl (meth) acrylate, n-hexyl (meth) acrylate, n-heptyl (meth) acrylate, 2-ethylhexyl (meth) Acrylate, n-octyl (meth) acrylate, isooctyl (meth) acrylate, n-nonyl (meth) acrylate, isononyl (meth) acrylate, n-decyl (
- the amount of (meth) acrylic acid alkyl ester used is usually 50 to 99.9% by mass, and 70 to 99.5% by mass. And more preferably 80 to 99% by mass.
- the monomer component forming the (meth) acrylic copolymer is, for example, an alkoxyalkyl (meth) acrylate, an alkoxypolyalkylene glycol mono (meth), as long as the physical properties of the (meth) acrylic copolymer are not impaired.
- Other (meth) acrylic esters such as acrylates, alicyclic groups or aromatic ring-containing (meth) acrylates, amino group-containing monomers can be included.
- the (meth) acrylic copolymer (A) can have other structural units derived from (meth) acrylic acid esters.
- alkoxyalkyl (meth) acrylate examples include methoxymethyl (meth) acrylate, 2-methoxyethyl (meth) acrylate, 2-ethoxyethyl (meth) acrylate, 3-methoxypropyl (meth) acrylate, 3-ethoxypropyl ( And (meth) acrylate, 4-methoxybutyl (meth) acrylate, and 4-ethoxybutyl (meth) acrylate.
- alkoxypolyalkylene glycol mono (meth) acrylate examples include methoxydiethylene glycol mono (meth) acrylate, methoxydipropylene glycol mono (meth) acrylate, ethoxytriethylene glycol mono (meth) acrylate, ethoxydiethylene glycol mono (meth) acrylate, And methoxytriethylene glycol mono (meth) acrylate.
- Examples of the alicyclic group or aromatic ring-containing (meth) acrylate include cyclohexyl (meth) acrylate, benzyl (meth) acrylate, and phenyl (meth) acrylate.
- amino group-containing monomer examples include amino group-containing (meth) acrylates such as dimethylaminoethyl (meth) acrylate and diethylaminoethyl (meth) acrylate.
- the total amount of the other (meth) acrylic acid esters is preferably 40% by mass or less, more preferably 20% by mass. It is as follows.
- acrylic acid esters may be used alone or in combination of two or more.
- the monomer component forming the (meth) acrylic copolymer is, for example, an amide group-containing monomer, a styrene monomer, or vinyl acetate as long as the physical properties of the (meth) acrylic copolymer are not impaired.
- Copolymerizable monomers can be included.
- the (meth) acrylic copolymer (A) can have a structural unit derived from a copolymerizable monomer.
- Examples of the amide group-containing monomer include N-mono such as (meth) acrylamide, N-methyl (meth) acrylamide, N-ethyl (meth) acrylamide, N-propyl (meth) acrylamide, N-hexyl (meth) acrylamide, and the like.
- Examples include alkyl-substituted acrylamides; N, N-dialkyl-substituted acrylamides such as N, N-dimethylacrylamide and N, N-dimethylmethacrylamide.
- styrenic monomer examples include styrene; methyl styrene, dimethyl styrene, trimethyl styrene, propyl styrene, butyl styrene, hexyl styrene, heptyl styrene, octyl styrene, and other alkyl styrenes; fluorostyrene, chlorostyrene, bromostyrene, Halogenated styrene such as dibromostyrene and iodinated styrene; nitrostyrene, acetylstyrene, and methoxystyrene.
- the total amount of the copolymerizable monomer is preferably 40% by mass or less, and more preferably 20% by mass or less.
- the copolymerizable monomer may be used alone or in combination of two or more.
- the (meth) acrylic copolymer can be produced by, for example, a conventionally known polymerization method such as a solution polymerization method, a bulk polymerization method, an emulsion polymerization method, a suspension polymerization method, and among these, the solution polymerization method is preferable. .
- a polymerization solvent and a polymerizable monomer are charged into a reaction vessel, a polymerization initiator is added in an inert gas atmosphere such as nitrogen gas, and the reaction start temperature is usually 40 to 100 ° C., preferably 50
- the reaction system is maintained at a temperature of 50 to 90 ° C., preferably 60 to 90 ° C., and is allowed to react for 4 to 20 hours.
- polymerization initiator examples include azo initiators and peroxide polymerization initiators.
- azo initiator examples include 2,2′-azobisisobutyronitrile, 2,2′-azobis (4-methoxy-2,4-dimethylvaleronitrile), 2,2′-azobis (2- Cyclopropylpropionitrile), 2,2′-azobis (2,4-dimethylvaleronitrile), 2,2′-azobis (2-methylbutyronitrile), 1,1′-azobis (cyclohexane-1-carbohydrate) Nitrile), 2- (carbamoylazo) isobutyronitrile, 2-phenylazo-4-methoxy-2,4-dimethylvaleronitrile, 2,2′-azobis (2-amidinopropane) dihydrochloride, 2,2′- Azobis (N, N'-dimethyleneisobutylamidine), 2,2'-azobis [2-methyl-N- (2-hydroxyethyl) -propionamide], 2,2'-a Bis (isobutyramide) dihydrate, 4,4′-
- peroxide polymerization initiators examples include t-butyl hydroperoxide, cumene hydroxide, dicumyl peroxide, benzoyl peroxide, lauroyl peroxide, caproyl peroxide, and di-i-propyl peroxydicarbonate.
- the polymerization initiator may be used alone or in combination of two or more.
- the polymerization initiator is usually in an amount of 0.001 to 5 parts by mass, preferably 0.005 to 3 parts by mass with respect to 100 parts by mass of the monomer component forming the (meth) acrylic copolymer. used. Moreover, you may add suitably a polymerization initiator, a chain transfer agent, a polymerizable monomer, and a polymerization solvent during the said polymerization reaction.
- polymerization solvent used for the solution polymerization examples include aromatic hydrocarbons such as benzene, toluene and xylene; aliphatic hydrocarbons such as n-pentane, n-hexane, n-heptane and n-octane; cyclopentane, Cycloaliphatic hydrocarbons such as cyclohexane, cycloheptane, cyclooctane; ethers such as diethyl ether, diisopropyl ether, 1,2-dimethoxyethane, dibutyl ether, tetrahydrofuran, dioxane, anisole, phenylethyl ether, diphenyl ether; chloroform, Halogenated hydrocarbons such as carbon tetrachloride, 1,2-dichloroethane, chlorobenzene; esters such as ethyl acetate, propyl acetate, butyl a
- the polymerization solvent may be used alone or in combination of two or more.
- the (meth) acrylic copolymer has a weight average molecular weight (Mw) measured by, for example, a gel permeation chromatography method (GPC method), which is usually 400,000 to 3 million in terms of polystyrene, preferably 700,000 to 2.5 million, more preferably 1 million to 2 million. It is preferable in terms of durability of the pressure-sensitive adhesive layer (B) that Mw is not less than the lower limit. It is preferable at the point of the applicability
- the (meth) acrylic copolymer has a molecular weight distribution (weight average molecular weight (Mw) / number average molecular weight (Mn)) measured by GPC method of usually 20 or less, preferably 2.2 to 15, more preferably 2.5-10.
- the glass transition temperature (Tg) of the (meth) acrylic copolymer can be measured, for example, by a differential scanning calorimeter, and from the monomer unit constituting the polymer and the content ratio thereof, the Fox formula is used. Can be calculated.
- a (meth) acrylic copolymer can be synthesized so that the glass transition temperature (Tg) determined by the Fox equation is usually ⁇ 70 to 10 ° C., preferably ⁇ 60 to 0 ° C.
- Tg is the glass transition temperature of the (meth) acrylic copolymer
- Tg 1 , Tg 2 ,..., Tg m are the glass transition temperatures of homopolymers composed of the respective monomers
- W 1 , W 2 , ..., W m is the weight fraction of the copolymer of structural units derived from each monomer.
- glass transition temperature of the homopolymer composed of each monomer in the Fox formula for example, a value described in Polymer Handbook Fourth Edition (Wiley-Interscience 2003) can be used.
- the pressure-sensitive adhesive composition desirably contains a crosslinking agent.
- the crosslinking agent is appropriately selected depending on the acidic functional group that can be introduced into the (meth) acrylic copolymer and a crosslinking group other than the acidic functional group.
- an isocyanate compound, an epoxy compound, or a metal chelate compound can be used.
- a crosslinking agent may be used individually by 1 type, and may use 2 or more types.
- the content of the crosslinking agent is appropriately selected according to the (meth) acrylic copolymer, and is 0.01 to 7 parts by mass with respect to 100 parts by mass of the (meth) acrylic copolymer.
- the amount is preferably 0.01 to 5 parts by mass.
- an isocyanate compound having 2 or more isocyanate groups in one molecule is usually used, preferably 2 to 8, and more preferably 3 to 6.
- the number of isocyanate groups is within the above range, it is preferable from the viewpoint of the crosslinking reaction efficiency between the (meth) acrylic copolymer and the isocyanate compound and the flexibility of the pressure-sensitive adhesive layer (B).
- diisocyanate compound having 2 isocyanate groups in one molecule examples include aliphatic diisocyanate, alicyclic diisocyanate, and aromatic diisocyanate.
- aliphatic diisocyanate examples include ethylene diisocyanate, tetramethylene diisocyanate, pentamethylene diisocyanate, hexamethylene diisocyanate, 2-methyl-1,5-pentane diisocyanate, 3-methyl-1,5-pentane diisocyanate, 2,2,4 -Aliphatic diisocyanates having 4 to 30 carbon atoms such as trimethyl-1,6-hexamethylene diisocyanate.
- Examples of the alicyclic diisocyanate include those having 7 to 30 carbon atoms such as isophorone diisocyanate, cyclopentyl diisocyanate, cyclohexyl diisocyanate, hydrogenated xylylene diisocyanate, hydrogenated tolylene diisocyanate, hydrogenated diphenylmethane diisocyanate, and hydrogenated tetramethylxylylene diisocyanate.
- An alicyclic diisocyanate is mentioned.
- aromatic diisocyanate examples include aromatic diisocyanates having 8 to 30 carbon atoms such as phenylene diisocyanate, tolylene diisocyanate, xylylene diisocyanate, naphthylene diisocyanate, diphenyl ether diisocyanate, diphenylmethane diisocyanate, and diphenylpropane diisocyanate.
- isocyanate compound having 3 or more isocyanate groups in one molecule examples include aromatic polyisocyanate, aliphatic polyisocyanate, and alicyclic polyisocyanate. Specific examples include 2,4,6-triisocyanate toluene, 1,3,5-triisocyanate benzene, and 4,4 ', 4 "-triphenylmethane triisocyanate.
- Examples of the isocyanate compound include multimers (for example, dimers or trimers, biurets, and isocyanurates) and derivatives (for example, polyhydric alcohols) of the above isocyanate compounds having 2 or 3 isocyanate groups. Addition reaction product with two or more diisocyanate compounds) and polymer.
- Examples of the polyhydric alcohol in the derivative include trivalent or higher alcohols such as trimethylolpropane, glycerin and pentaerythritol as low molecular weight polyhydric alcohols; high molecular weight polyhydric alcohols such as polyether polyols, Examples include polyester polyol, acrylic polyol, polybutadiene polyol, and polyisoprene polyol.
- isocyanate compounds include diphenylmethane diisocyanate trimer, polymethylene polyphenyl polyisocyanate, hexamethylene diisocyanate or tolylene diisocyanate biuret or isocyanurate, trimethylolpropane and tolylene diisocyanate or xylylene diisocyanate.
- Reaction product for example, a trimolecular adduct of tolylene diisocyanate or xylylene diisocyanate
- reaction product of trimethylolpropane and hexamethylene diisocyanate for example, a trimolecular adduct of hexamethylene diisocyanate
- polyether polyisocyanate for example, a polyether polyisocyanate
- Polyester polyisocyanate is mentioned.
- reaction products of trimethylolpropane and tolylene diisocyanate or xylylene diisocyanate (L-45 manufactured by Soken Chemical Co., Ltd., TD-75 manufactured by Soken Chemical Co., Ltd.), etc. Is preferred.
- Examples of the epoxy compound include compounds having two or more epoxy groups in the molecule.
- Examples of commercially available products include E-5CM manufactured by Soken Chemical Co., Ltd. and E-5XM manufactured by Soken Chemical Co., Ltd.
- an alkoxide, acetylacetone, ethyl acetoacetate or the like is coordinated to a polyvalent metal such as aluminum, iron, copper, zinc, tin, titanium, nickel, antimony, magnesium, vanadium, chromium, and zirconium.
- a polyvalent metal such as aluminum, iron, copper, zinc, tin, titanium, nickel, antimony, magnesium, vanadium, chromium, and zirconium.
- Compounds. Specific examples include aluminum isopropylate, aluminum secondary butyrate, aluminum ethyl acetoacetate / diisopropylate, aluminum trisethyl acetoacetate, and aluminum trisacetylacetonate.
- the pressure-sensitive adhesive composition may contain a silane coupling agent.
- a silane coupling agent By using a silane coupling agent, the pressure-sensitive adhesive layer (B) can be firmly adhered to a substrate such as a glass plate, and this can contribute to the prevention of peeling of the polarizing plate (A).
- silane coupling agent examples include vinyltrimethoxysilane, vinyltriethoxysilane, 3-methacryloxypropylmethyldimethoxysilane, 3-methacryloxypropyltrimethoxysilane, 3-methacryloxypropylmethyldiethoxysilane, 3-methacryloxysilane.
- Polymerizable unsaturated group-containing silane coupling agents such as loxypropyltriethoxysilane; 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropyltriethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, 3- Epoxy group-containing silane coupling agents such as glycidoxypropylmethyldiethoxysilane and 2- (3,4-epoxycyclohexyl) ethyltrimethoxysilane; 3-aminopropyltrimethoxysilane, 3-aminopropiyl Triethoxysilane, N- (2-aminoethyl) -3-aminopropyltrimethoxysilane, N- (2-aminoethyl) -3-aminopropylmethyldimethoxysilane, 3-triethoxysilyl-N- (1,3 -Dimethyl-butylidene) prop
- the content of the silane coupling agent in the pressure-sensitive adhesive composition is usually 1 part by mass or less, preferably 0.01 to 1 part by mass, more preferably 0.001 part by mass with respect to 100 parts by mass of the (meth) acrylic copolymer. 05 to 0.5 parts by mass.
- An antistatic agent can be used in order to reduce the surface resistance value of an adhesive layer (B), for example.
- the antistatic agent include a surfactant, an ionic compound, and a conductive polymer.
- surfactant examples include cationic surfactants having cationic groups such as quaternary ammonium salts, amide quaternary ammonium salts, pyridium salts, primary to tertiary amino groups; sulfonate groups, sulfate esters Anionic surfactants having an anionic group such as a base or a phosphate ester base; amphoteric surfactants such as alkylbetaines, alkylimidazolinium betaines, alkylamine oxides, amino acid sulfates, glycerin fatty acid esters
- Nonionic surfactants such as sorbitan fatty acid esters, polyoxyethylene alkylamines, polyoxyethylene alkylamine fatty acid esters, N-hydroxyethyl-N-2-hydroxyalkylamines and alkyldiethanolamides It is done.
- a reactive emulsifier having a polymerizable group is also exemplified as the surfactant, and a polymer surfactant obtained by increasing the molecular weight of the monomer component containing the above surfactant or reactive emulsifier can also be used.
- the ionic compound is composed of a cation part and an anion part, and may be either solid or liquid at room temperature (23 ° C./50% RH).
- the cation portion constituting the ionic compound may be either an inorganic cation or an organic cation, or both.
- the inorganic cation alkali metal ions and alkaline earth metal ions are preferable, and Li + , Na + and K + having excellent antistatic properties are more preferable.
- the organic cation include pyridinium cation, piperidinium cation, pyrrolidinium cation, pyrroline cation, pyrrole cation, imidazolium cation, tetrahydropyrimidinium cation, dihydropyrimidinium cation, pyrazolium cation, and pyrazolinium.
- Examples include cations, tetraalkylammonium cations, trialkylsulfonium cations, tetraalkylphosphonium cations, and derivatives thereof.
- the anion moiety constituting the ionic compound is not particularly limited as long as it can form an ionic compound by ionic bonding with the cation moiety.
- Examples of the ionic compound include lithium bis (trifluoromethanesulfonyl) imide, lithium bis (difluorosulfonyl) imide, lithium tris (trifluoromethanesulfonyl) methane, potassium bis (trifluoromethanesulfonyl) imide, potassium bis (difluorosulfonyl) imide, 1 -Ethylpyridinium hexafluorophosphate, 1-butylpyridinium hexafluorophosphate, 1-hexyl-4-methylpyridinium hexafluorophosphate, 1-octyl-4-methylpyridinium hexafluorophosphate, 1-octyl-4-methylpyridinium bis (fluoro Sulfonyl) imide, 1-octyl-4-methylpyridinium bis (trifluoromethanesulfonyl) imide, (N, N-die) -N
- Examples of the conductive polymer include polythiophene, polyaniline, polypyrrole, and derivatives thereof.
- the content of the antistatic agent in the pressure-sensitive adhesive composition is usually 3 parts by mass or less, preferably 0.01 to 3 parts by mass, more preferably 0.05 with respect to 100 parts by mass of the (meth) acrylic copolymer. ⁇ 2.5 parts by mass.
- the pressure-sensitive adhesive composition is selected from an antioxidant, a light stabilizer, a metal corrosion inhibitor, a tackifier, a plasticizer, a crosslinking accelerator, and a reworking agent as long as the effects of the present invention are not impaired.
- 1 type (s) or 2 or more types may be contained.
- the pressure-sensitive adhesive composition preferably contains an organic solvent in order to adjust its coatability.
- an organic solvent the polymerization solvent described in the column of ⁇ the manufacturing condition of (meth) acrylic-type copolymer >> is mentioned.
- a pressure-sensitive adhesive composition obtained by mixing a polymer solution containing a (meth) acrylic copolymer and a polymerization solvent and, if necessary, at least one selected from a crosslinking agent, a silane coupling agent and an antistatic agent. Can be prepared.
- the content of the organic solvent is usually 50 to 90% by mass, preferably 60 to 90% by mass.
- solid content refers to all components excluding the organic solvent among the components contained in the pressure-sensitive adhesive composition or the following primer composition.
- the pressure-sensitive adhesive composition can be prepared by mixing the (meth) acrylic copolymer and, if necessary, other components by a conventionally known method. For example, other components may be added to the polymer solution containing the (meth) acrylic copolymer obtained when the (meth) acrylic copolymer is synthesized, as necessary.
- the pressure-sensitive adhesive layer (B) in the present invention is formed from the above-mentioned pressure-sensitive adhesive composition.
- the pressure-sensitive adhesive layer (B) can be obtained by proceeding with a crosslinking reaction in the pressure-sensitive adhesive composition, specifically, by crosslinking the (meth) acrylic copolymer with a crosslinking agent.
- the conditions for forming the pressure-sensitive adhesive layer (B) will be described in the section [Method for producing polarizing plate with pressure-sensitive adhesive layer].
- the film thickness of the pressure-sensitive adhesive layer (B) is preferably 1 to 100 ⁇ m, more preferably 5 to 50 ⁇ m, and particularly preferably 10 to 30 ⁇ m.
- the film thickness can be measured by a paper thickness type film thickness meter.
- the pressure-sensitive adhesive layer (B) has a gel fraction of preferably 20 to 98% by mass, more preferably 30 to 98% by mass from the viewpoints of suppressing distortion of the polarizing plate (A), cohesion, adhesion, and removability. %, More preferably 35 to 95% by mass.
- Primer layer (C) The primer layer (C) is formed from a primer composition.
- the primer composition contains an isocyanate compound described below.
- the primer composition may contain a reaction accelerator and an organic solvent, if necessary.
- an isocyanate compound having 2 or more isocyanate groups in one molecule is usually used, preferably 2 to 8, and more preferably 3 to 6.
- diisocyanate compound having 2 isocyanate groups in one molecule examples include aliphatic diisocyanate, alicyclic diisocyanate, and aromatic diisocyanate.
- Aliphatic diisocyanates include ethylene diisocyanate, tetramethylene diisocyanate, pentamethylene diisocyanate, hexamethylene diisocyanate, 2-methyl-1,5-pentane diisocyanate, 3-methyl-1,5-pentane diisocyanate, 2,2,4-trimethyl And aliphatic diisocyanates having 4 to 30 carbon atoms such as -1,6-hexamethylene diisocyanate.
- alicyclic diisocyanates include alicyclic rings having 7 to 30 carbon atoms such as isophorone diisocyanate, cyclopentyl diisocyanate, cyclohexyl diisocyanate, hydrogenated xylylene diisocyanate, hydrogenated tolylene diisocyanate, hydrogenated diphenylmethane diisocyanate, and hydrogenated tetramethylxylylene diisocyanate.
- Group diisocyanates are examples of alicyclic rings having 7 to 30 carbon atoms such as isophorone diisocyanate, cyclopentyl diisocyanate, cyclohexyl diisocyanate, hydrogenated xylylene diisocyanate, hydrogenated tolylene diisocyanate, hydrogenated diphenylmethane diisocyanate, and hydrogenated tetramethylxylylene diisocyanate.
- aromatic diisocyanate examples include aromatic diisocyanates having 8 to 30 carbon atoms such as phenylene diisocyanate, tolylene diisocyanate, xylylene diisocyanate, naphthylene diisocyanate, diphenyl ether diisocyanate, diphenylmethane diisocyanate, and diphenylpropane diisocyanate.
- isocyanate compound having 3 or more isocyanate groups in one molecule examples include aromatic polyisocyanate, aliphatic polyisocyanate, and alicyclic polyisocyanate. Specific examples include 2,4,6-triisocyanate toluene, 1,3,5-triisocyanate benzene, and 4,4 ', 4 "-triphenylmethane triisocyanate.
- Examples of the isocyanate compound include multimers (for example, dimers or trimers, biurets, and isocyanurates) and derivatives (for example, polyhydric alcohols) of the above isocyanate compounds having 2 or 3 isocyanate groups. Addition reaction product with two or more diisocyanate compounds) and polymer.
- Examples of the polyhydric alcohol in the derivative include trivalent or higher alcohols such as trimethylolpropane, glycerin and pentaerythritol as low molecular weight polyhydric alcohols; high molecular weight polyhydric alcohols such as polyether polyols, Examples include polyester polyol, acrylic polyol, polybutadiene polyol, and polyisoprene polyol.
- isocyanate compounds include diphenylmethane diisocyanate trimer, polymethylene polyphenyl polyisocyanate, hexamethylene diisocyanate or tolylene diisocyanate biuret or isocyanurate, trimethylolpropane and tolylene diisocyanate or xylylene diisocyanate.
- Reaction product for example, a trimolecular adduct of tolylene diisocyanate or xylylene diisocyanate
- reaction product of trimethylolpropane and hexamethylene diisocyanate for example, a trimolecular adduct of hexamethylene diisocyanate
- polyether polyisocyanate for example, a polyether polyisocyanate
- Polyester polyisocyanate is mentioned.
- isocyanate compounds include xylylene diisocyanate compounds (manufactured by Soken Chemical Co., Ltd., TD-75), hexamethylene diisocyanate compounds (manufactured by Soken Chemical Co., Ltd., D-94, solid content concentration of 90% by mass). ), Tolylene diisocyanate compounds (manufactured by Soken Chemical Co., Ltd., L-45, solid concentration 45% by mass).
- the isocyanate compound is preferably a xylylene diisocyanate compound or a hexamethylene diisocyanate compound from the viewpoint of obtaining a primer layer having good reactivity with the crosslinking point of the pressure-sensitive adhesive layer (B) and excellent adhesion.
- the isocyanate compound may be used alone or in combination of two or more.
- the content of the isocyanate compound is usually 91% by mass or more, preferably 93 to 99.99% by mass, and more preferably 95 to 99.99% by mass in 100% by mass of the solid content of the primer composition. It is preferable in the said range at the point which improves the adhesiveness of a polarizing plate (A) and an adhesive layer (B).
- the primer composition may contain a reaction accelerator.
- the kind of reaction accelerator can be suitably selected according to the isocyanate compound to be used.
- a reaction accelerator refers to the catalyst which raises the speed
- reaction accelerator examples include tin (Sn) -containing compounds such as dioctyltin dilaurate, dibutyltin dilaurate, dibutyltin diacetate, dibutyltin diacetylacetonate, tetra-n-butyltin, and trimethyltin hydroxide; N, N , N ′, N′-tetramethylhexanediamine, amines such as triethylamine, and N-containing compounds such as imidazoles.
- the primer layer (C) is formed from the primer composition and the pressure-sensitive adhesive layer (B) is laminated, the isocyanate compound contained in the primer layer (C) and the (meth) acrylic type contained in the pressure-sensitive adhesive layer (B) Crosslinking reaction occurs between the acidic functional group of the copolymer and a crosslinkable functional group other than the acidic functional group.
- the reaction between the isocyanate compounds is promoted by adding a reaction accelerator to the primer composition, and therefore, the transition of the isocyanate compound in the primer layer (C) to the pressure-sensitive adhesive layer (B) is suppressed. I can do it.
- reaction accelerators it is preferable to add a tin-containing compound to the primer composition because the above-described advantages are easily exhibited.
- the content of the reaction accelerator is preferably 0.001% by mass or more, more preferably 0.001 to 1% by mass, and particularly preferably 0.01 to 0.00% in the solid content of 100% by mass of the primer composition. 5% by mass.
- the primer composition preferably contains an organic solvent in order to adjust its coatability.
- an organic solvent the polymerization solvent described in the column of ⁇ the manufacturing condition of (meth) acrylic-type copolymer >> is mentioned.
- a primer composition can be prepared by diluting an isocyanate compound and, if necessary, a reaction accelerator with an organic solvent.
- the content of the organic solvent is usually 50 to 90% by mass, preferably 60 to 90% by mass.
- the primer layer (C) in the present invention is formed from the above-described primer composition.
- the conditions for forming the primer layer (C) will be described in the section [Method for producing polarizing plate with pressure-sensitive adhesive layer].
- the film thickness of the primer layer (C) is preferably 5 ⁇ m or less, more preferably 0.1 to 3 ⁇ m, and particularly preferably 0.1 to 2 ⁇ m. When the film thickness is within the above range, the primer layer (C) has excellent adhesion between the polarizing plate (A) and the pressure-sensitive adhesive layer (B), and further does not promote deterioration over time of the pressure-sensitive adhesive layer (B). Is excellent from.
- the film thickness can be measured by a paper thickness type film thickness meter.
- the polarizing plate with the pressure-sensitive adhesive layer of the present invention comprises a polarizing plate (A), a pressure-sensitive adhesive layer (B), and a primer layer (C) between the polarizing plate (A) and the pressure-sensitive adhesive layer (B).
- the method for producing a polarizing plate with a pressure-sensitive adhesive layer includes a step of forming a primer layer (C) made of a primer composition containing an isocyanate compound on at least one surface of the polarizing plate (A), and the primer layer (C) And forming a pressure-sensitive adhesive layer (B) comprising a pressure-sensitive adhesive composition containing an acidic functional group-containing (meth) acrylic copolymer.
- the method for forming the primer layer (C) is not particularly limited, and the primer composition is directly applied to the surface of the polarizing plate (A) using a bar coater and dried. And a method of transferring the primer layer (C) formed on the support to the surface of the polarizing plate (A).
- the conditions for forming the primer layer (C) are, for example, as follows.
- the primer composition is applied to the polarizing plate (A) or the support and varies depending on the type of solvent, but is usually 50 to 150 ° C., preferably 60 to 100 ° C., usually 10 seconds to 10 minutes, preferably 1 to 7 Dry for minutes to remove the solvent and form a coating.
- the film thickness of the dried coating film is as described in ⁇ Physical properties of primer layer (C)>.
- the primer composition may be applied by a known method such as spin coating, knife coating, roll coating, bar coating, blade coating, die coating, or gravure coating so as to obtain a predetermined thickness.
- coating and drying can be used.
- the support examples include a polyester film such as polyethylene terephthalate (PET); and a plastic film such as a polyolefin film such as polyethylene, polypropylene, and ethylene-vinyl acetate copolymer.
- PET polyethylene terephthalate
- plastic film such as a polyolefin film such as polyethylene, polypropylene, and ethylene-vinyl acetate copolymer.
- the method for forming the pressure-sensitive adhesive layer (B) is not particularly limited, and the surface of the primer layer (C) And a method of directly applying the primer composition using a bar coater and drying and aging, and a method of transferring and aging the pressure-sensitive adhesive layer (B) formed on the support onto the surface of the primer layer (C). .
- the formation conditions of the pressure-sensitive adhesive layer (B) are, for example, as follows.
- the pressure-sensitive adhesive composition is applied onto the surface of the primer layer (C) or the support and varies depending on the type of solvent, but is usually 50 to 150 ° C., preferably 60 to 100 ° C., usually 10 seconds to 10 minutes, preferably Is dried for 1 to 7 minutes to remove the solvent and form a coating film.
- the film thickness of the dried coating film is usually 5 to 75 ⁇ m, preferably 10 to 50 ⁇ m.
- the pressure-sensitive adhesive layer (B) is preferably formed under the following conditions. After the pressure-sensitive adhesive composition was applied to the surface of the primer layer (C) of the polarizing plate with the primer layer and a coating film was formed under the above conditions, or the pressure-sensitive adhesive composition was applied onto a support and formed under the above conditions. After transferring the coating film to the surface of the primer layer (C), usually 3 days or more, preferably 7 to 10 days, usually 5 to 60 ° C., preferably 15 to 40 ° C., usually 30 to 70% RH, preferably 40 Curing in an environment of ⁇ 70% RH. When crosslinking is performed under the aging conditions as described above, a crosslinked body (network polymer) can be efficiently formed.
- Examples of the method for applying the pressure-sensitive adhesive composition include the same method as the method for applying the primer layer (C).
- the time required from the production of the polarizing plate with the primer layer to the application of the pressure-sensitive adhesive layer (B-1) is at most 10 days, preferably within 24 hours, more preferably from the viewpoint of improving adhesion. Is preferably within 1 hour, more preferably within 5 minutes.
- HLC-8320GPC manufactured by Tosoh Corporation
- -GPC column configuration The following four columns (all manufactured by Tosoh Corporation) (1) TSKgel HxL-H (guard column) (2) TSKgel GMHxL (3) TSKgel GMHxL (4) TSKgel G2500HxL ⁇ Flow rate: 1.0 mL / min -Column temperature: 40 ° C Sample concentration: 1.5% (w / v) (diluted with tetrahydrofuran) -Mobile phase solvent: Tetrahydrofuran-Standard polystyrene conversion [Production Example C1a] The following (c1) was diluted with butyl acetate to prepare a solid concentration of 20% by mass.
- Concentration adjusted (c1) as a component constituting the primer layer is 100 parts (solid content is 20 parts), and a reaction accelerator is dibutyltin dilaurate (solid content concentration of 0.5 mass%) is 20 parts (solid content is 0%). .1 part) to obtain a primer solution.
- the primer solution was applied to one side of a polarizing plate (thickness: 110 ⁇ m, layer structure: triacetyl cellulose film / polyvinyl alcohol film / triacetyl cellulose film) with a wire bar. At this time, coating was performed so that the thickness of the primer layer after drying was 0.1 ⁇ m, and then drying was performed at 80 ° C. for 2 minutes to obtain a polarizing plate with a primer layer (C-1a).
- the components constituting the primer layer used in Production Examples C1a to C7 are as follows.
- C1 Trimethylolpropane adduct of xylylene diisocyanate (manufactured by Soken Chemical Co., Ltd., TD-75, solid content concentration 75% by mass)
- C2 Trimethylolalkane adduct of hexamethylene diisocyanate (manufactured by Soken Chemical Co., Ltd., D-94, solid concentration 90% by mass)
- C3 Trimethylolpropane adduct of tolylene diisocyanate (manufactured by Soken Chemical Co., Ltd., L-45, solid content concentration 45% by mass)
- C5 Polyether-based polyurethane resin (manufactured by Mitsui Chemicals, W-6020, solid content concentration 3 mass%)
- Cross-linking agent 1 Trimethylolpropane adduct of tolylene diisocyanate (manufactured by Soken Chemical Co., Ltd., L-45, solid concentration 45% by mass) 0.6 part
- Cross-linking agent 2 Epoxy-based cross-linking agent (Soken Chemical Co., Ltd.) 0.02 part Silane coupling agent: 3-Glydoxypropyltrimethoxysilane (manufactured by Shin-Etsu Chemical Co., Ltd., KBM-403) 0.2 part
- Antistatic agent "AS-804" (Daiichi Kogyo Seiyaku Co., Ltd.) 1 part (3) Preparation of pressure-sensitive adhesive sheet After removing the pressure-sensitive adhesive composition obtained in (2) above on the peeled polyester film The solution was applied at a liquid temperature of 25 ° C. using a doctor blade. By drying at 90 ° C. for 3 minutes, a pressure-sensitive adhesive sheet having a pressure-sensitive adhesive layer (B-1) having a dry film thickness
- the pressure-sensitive adhesive layer (B-1) of the pressure-sensitive adhesive sheet obtained in Production Example B1 was prepared using the polarizing plate with primer layer (C-1a) having a thickness of 0.1 ⁇ m in the primer layer obtained in Production Example C1a.
- the time required from the production of the polarizing plate with a primer layer (C-1a) to the application of the pressure-sensitive adhesive layer (B-1) was 1 to 5 minutes. This was left to stand in the dark for 7 days under the conditions of 23 ° C./50% RH and aged to obtain a polarizing plate with an adhesive layer.
- the adhesive force measurement, the transfer area test, and the heat-resistant durability test were done. The results are shown in Table 2.
- Examples 2 to 8 and Comparative Examples 1 to 6 A polarizing plate with a pressure-sensitive adhesive layer was obtained in the same manner as in Example 1 except that the polarizing plate with a primer layer and the pressure-sensitive adhesive layer were changed as described in Table 2 or Table 3 in Example 1.
- the primer layer was not provided, and the pressure-sensitive adhesive layer (B-1) was directly attached to the polarizing plate.
- the adhesive force measurement, the transfer area test, and the heat-resistant durability test were done. The results are shown in Table 2 or Table 3.
- the obtained laminate was held in an autoclave adjusted to 50 ° C./5 atm for 20 minutes. Next, after being left in a 23 ° C./50% RH environment for 2 hours or more, the edge of the polarizing plate was pulled at a peeling angle of 180 ° and a peeling speed of 300 mm / min with respect to the alkali glass plate surface of the adherend. The adhesive strength (peel strength) was measured.
- the plate was further left under a 23 ° C./50% RH environment for 1 hour, and the polarizing plate edge was pulled at a peeling angle of 180 ° and a peeling speed of 300 mm / min with respect to the alkali glass plate surface of the adherend.
- the pressure-sensitive adhesive layer transferred onto the glass surface was visually confirmed.
- a transfer area of 0% indicates that there is no transfer and adhesion between the pressure-sensitive adhesive layer and the polarizing plate is good, and a transfer area of 100% indicates that the entire surface is transferred and the pressure-sensitive adhesive layer and the polarizing plate are in close contact with each other. Indicates that the sex is bad.
- the test plate was allowed to stand for 500 hours at a temperature of 100 ° C., and evaluated by observing the occurrence of foaming and peeling in the pressure-sensitive adhesive layer according to the following criteria.
- Foaming occurs when cohesion is insufficient, and peeling occurs when adhesion is insufficient or stress relaxation is insufficient.
- -AA Foaming and peeling are not seen at all.
- -BB The area of foaming / peeling is less than 5% of the whole.
- -CC The area of foaming / peeling is 5% or more and less than 7% of the whole.
- DD Foaming / peeling area is 7% or more of the whole
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Adhesive Tapes (AREA)
- Polarising Elements (AREA)
- Laminated Bodies (AREA)
- Paints Or Removers (AREA)
Abstract
Description
本発明の粘着剤層付偏光板は、偏光板(A)と、粘着剤層(B)と、前記偏光板(A)および前記粘着剤層(B)の間にプライマー層(C)とを有する。
偏光板(A)としては、従来公知の偏光板を使用することができ、例えば、偏光子と、前記偏光子の片面または両面上に配置された偏光子保護膜とを有する偏光板が挙げられる。なお、本明細書では、「偏光板」は「偏光フィルム」を包含する意味で用いる。
粘着剤層(B)は、粘着剤組成物から形成される。
粘着剤組成物は、以下に説明する、酸性官能基含有(メタ)アクリル系共重合体を含有する。前記粘着剤組成物は、必要に応じて、架橋剤、シランカップリング剤、帯電防止剤および添加剤から選ばれる少なくとも一種をさらに含有してもよい。また、前記粘着剤組成物は、有機溶媒を含むことが好ましい。本明細書において、「酸性官能基含有(メタ)アクリル系共重合体」を単に「(メタ)アクリル系共重合体」とも記載する。
酸性官能基含有(メタ)アクリル系共重合体は、酸性官能基が導入された共重合体である。前記(メタ)アクリル系共重合体は、酸性官能基含有モノマーを含むモノマー成分の共重合体であることが好ましく、前記モノマー成分を重合させて得られることが好ましい。前記モノマー成分は、前記酸性官能基含有モノマーに加え、水酸基などの架橋性官能基が導入された酸性官能基以外の架橋性官能基含有モノマー、架橋性官能基を有しない(メタ)アクリル酸アルキルエステルおよびその他のモノマーなどを含有することもできる。このように、(メタ)アクリル系共重合体は、酸性官能基含有モノマー由来の構造単位を有することが好ましい。
酸性官能基含有モノマーとは、酸性官能基を少なくとも一つ有するモノマーである。
酸性官能基以外の架橋性官能基含有モノマーとは、酸性官能基以外の架橋性官能基を少なくとも一つ有するモノマーである。前記架橋性官能基とは、前記粘着剤組成物から形成される粘着剤層(B)に架橋点を導入可能な官能基のことであり、例えば、水酸基が挙げられる。(メタ)アクリル系共重合体(A)は、架橋性官能基含有モノマー由来の構造単位を有してもよい。
(メタ)アクリル酸アルキルエステルとしては、アルキル基の炭素数が1~18の(メタ)アクリル酸アルキルエステル(CH2=CR1-COOR2;R1は水素原子またはメチル基であり、R2は炭素数1~18のアルキル基である)が用いられ、ここで前記アルキル基の炭素数は4~12がより好ましい。(メタ)アクリル系共重合体(A)は、(メタ)アクリル酸アルキルエステル由来の構造単位を有することが好ましい。
前記(メタ)アクリル系共重合体を形成するモノマー成分は、前記(メタ)アクリル系共重合体の物性を損なわない範囲で、例えば、アルコキシアルキル(メタ)アクリレート、アルコキシポリアルキレングリコールモノ(メタ)アクリレート、脂環式基または芳香環含有(メタ)アクリレート、アミノ基含有モノマーなどの、その他の(メタ)アクリル酸エステルを含むことができる。(メタ)アクリル系共重合体(A)は、その他の(メタ)アクリル酸エステル由来の構造単位を有することができる。
(メタ)アクリル系共重合体は、例えば、溶液重合法、塊状重合法、乳化重合法、懸濁重合法等の従来公知の重合法により製造することができ、これらの中でも溶液重合法が好ましい。具体的には、反応容器内に重合溶媒、重合性単量体を仕込み、窒素ガス等の不活性ガス雰囲気下で重合開始剤を添加し、反応開始温度を通常40~100℃、好ましくは50~80℃に設定し、通常50~90℃、好ましくは60~90℃の温度に反応系を維持して、4~20時間反応させる。
(メタ)アクリル系共重合体は、例えば、ゲルパーミエーションクロマトグラフィー法(GPC法)により測定される重量平均分子量(Mw)が、ポリスチレン換算値で、通常40万~300万であり、好ましくは70万~250万、より好ましくは100万~200万である。Mwが前記下限値以上であると、粘着剤層(B)の耐久性の点で好ましい。Mwが前記上限値以下であると、粘着剤組成物の塗工性の点で好ましい。
W1+W2+…+Wm=1
式中、Tgは(メタ)アクリル系共重合体のガラス転移温度であり、Tg1,Tg2,…,Tgmは各モノマーからなるホモポリマーのガラス転移温度であり、W1,W2,…,Wmは各モノマー由来の構成単位の前記共重合体における重量分率である。
粘着剤組成物は、架橋剤を含有することが望ましい。架橋剤は前記(メタ)アクリル系共重合体に導入され得る酸性官能基および酸性官能基以外の架橋性基によって適宜選択され、例えば、イソシアネート化合物、エポキシ化合物、金属キレート化合物を用いることができる。
粘着剤組成物は、シランカップリング剤を含有してもよい。シランカップリング剤を用いることで、ガラス板等の基板に対して粘着剤層(B)を強固に接着させ、偏光板(A)の剥がれを防止する点に寄与しうる。
帯電防止剤は、例えば、粘着剤層(B)の表面抵抗値を低下させるために使用することができる。帯電防止剤としては、例えば、界面活性剤、イオン性化合物、導電性ポリマーが挙げられる。
粘着剤組成物は、上記成分のほか、本発明の効果を損なわない範囲で、酸化防止剤、光安定剤、金属腐蝕防止剤、粘着付与剤、可塑剤、架橋促進剤およびリワーク剤から選択される1種または2種以上を含有してもよい。
粘着剤組成物は、その塗布性を調製するため、有機溶媒を含有することが好ましい。有機溶媒としては、《(メタ)アクリル系共重合体の製造条件》の欄に記載した重合溶媒が挙げられる。例えば、(メタ)アクリル系共重合体および重合溶媒を含むポリマー溶液と、必要に応じて、架橋剤、シランカップリング剤および帯電防止剤から選ばれる少なくとも一種とを混合して、粘着剤組成物を調製することができる。粘着剤組成物において、有機溶媒の含有量は、通常50~90質量%、好ましくは60~90質量%である。
粘着剤組成物は、前記(メタ)アクリル系共重合体と必要に応じて他の成分とを、従来公知の方法により混合することで調製することができる。例えば、前記(メタ)アクリル系共重合体を合成する際に得られた、前記(メタ)アクリル系共重合体を含むポリマー溶液に、必要に応じて他の成分を配合することが挙げられる。
本発明における粘着剤層(B)は、上述の粘着剤組成物から形成される。例えば、上述の粘着剤組成物中の架橋反応を進めることにより、具体的には前記(メタ)アクリル系共重合体を架橋剤で架橋することにより、前記粘着剤層(B)が得られる。粘着剤層(B)の形成条件は、〔粘着剤層付偏光板の製造方法〕の欄で説明する。
プライマー層(C)は、プライマー組成物から形成される。
プライマー組成物は、以下に説明する、イソシアネート化合物を含有する。前記プライマー組成物は、必要に応じて、反応促進剤および有機溶媒等を含有してもよい。
イソシアネート化合物としては、1分子中のイソシアネート基数が2以上のイソシアネート化合物が通常用いられ、好ましくは2~8であり、より好ましくは3~6である。
プライマー組成物は、反応促進剤を含有してもよい。反応促進剤の種類は、使用するイソアネート化合物に応じて適宜選択することができる。なお、反応促進剤とは、イソシアネート化合物同士の反応の速度を高める触媒を指す。
プライマー組成物は、その塗布性を調製するため、有機溶媒を含有することが好ましい。有機溶媒としては、《(メタ)アクリル系共重合体の製造条件》の欄に記載した重合溶媒が挙げられる。例えば、イソシアネート化合物と必要に応じて反応促進剤とを有機溶媒で希釈することでプライマー組成物を調製することができる。プライマー組成物において、有機溶媒の含有量は、通常50~90質量%、好ましくは60~90質量%である。
本発明におけるプライマー層(C)は、上述のプライマー組成物から形成される。プライマー層(C)の形成条件は、〔粘着剤層付偏光板の製造方法〕の欄で説明する。
本発明の粘着剤層付偏光板は、偏光板(A)と、粘着剤層(B)と、前記偏光板(A)および前記粘着剤層(B)の間に、プライマー層(C)とを有する。
下記製造例C4で使用したメタクリル酸メチルおよび製造例B1~B5で合成した(メタ)アクリル系共重合体について、ゲルパーミエーションクロマトグラフィー法(GPC法)により、下記条件で重量平均分子量(Mw)および数平均分子量(Mn)を求めた。
・測定装置:HLC-8320GPC(東ソー(株)製)
・GPCカラム構成:以下の4連カラム(すべて東ソー(株)製)
(1)TSKgel HxL-H(ガードカラム)
(2)TSKgel GMHxL
(3)TSKgel GMHxL
(4)TSKgel G2500HxL
・流速:1.0mL/min
・カラム温度:40℃
・サンプル濃度:1.5%(w/v)(テトラヒドロフランで希釈)
・移動相溶媒:テトラヒドロフラン
・標準ポリスチレン換算
[製造例C1a]
下記(c1)を、酢酸ブチルで希釈して固形分濃度20質量%に調製した。プライマー層を構成する成分として濃度調製後の(c1)を100部(固形分は20部)、反応促進剤としてジブチル錫ジラウレート(固形分濃度0.5質量%)を20部(固形分は0.1部)使用し、プライマー溶液を得た。前記プライマー溶液を、偏光板(厚さ:110μm、層構成:トリアセチルセルロースフィルム/ポリビニルアルコールフィルム/トリアセチルセルロースフィルム)の片面に、ワイヤーバーにて塗工した。この時、乾燥後のプライマー層の膜厚が、0.1μmとなるように塗工し、その後、80℃で2分間乾燥させて、プライマー層付偏光板(C-1a)を得た。
乾燥後のプライマー層の膜厚が、0.1μmの代わりに、0.5μmとなるように塗工した以外は、製造例C1aと同様に行い、プライマー層付偏光板(C-1b)を得た。
乾燥後のプライマー層の膜厚が、0.1μmの代わりに、2μmとなるように塗工した以外は、製造例C1aと同様に行い、プライマー層付偏光板(C-1c)を得た。
反応促進剤を使用しなかったこと以外は、製造例C1aと同様に行い、プライマー層付偏光板(C-1d)を得た。
プライマー層を構成する成分として、製造例C2では下記の(c2)を、製造例C3では下記の(c3)を、製造例C4では下記の(c4)を、製造例C5では下記の(c5)を、製造例C6では下記の(c6)を、酢酸ブチルで希釈または濃縮し、固形分濃度を20質量%に調製したものを用いた以外は、製造例C1bと同様に行い、プライマー層付偏光板(C-2)~(C-6)を得た。
(c1):キシリレンジイソシアネートのトリメチロールプロパンアダクト体
(綜研化学(株)製、TD-75、固形分濃度75質量%)
(c2):ヘキサメチレンジイソシアネートのトリメチロールアルカンアダクト体
(綜研化学(株)製、D-94、固形分濃度90質量%)
(c3):トリレンジイソシアネートのトリメチロールプロパンアダクト体
(綜研化学(株)製、L-45、固形分濃度45質量%)
(c4):メタクリル酸メチル(MMA)樹脂(MMA=100質量%、Mw 1万、Mw/Mn=3.0)
(c5):ポリエーテル系ポリウレタン樹脂
(三井化学(株)製、W-6020、固形分濃度3質量%)
(c6):オキサゾリン基含有ポリマー
((株)日本触媒製、エポクロスWS-700、固形分濃度25質量%)
[製造例B1]
(1)(メタ)アクリル系共重合体のポリマー溶液の調製
撹拌機、還流冷却器、温度計および窒素導入管を備えた反応装置に、n-ブチルアクリレート94部、アクリル酸6部および酢酸エチル溶媒100部を仕込み、窒素ガスを導入しながら80℃に昇温した。次いで、2,2'-アゾビスイソブチロニトリル0.1部を加え、窒素ガス雰囲気下、80℃で6時間重合反応を行った。反応終了後、酢酸エチルにて希釈し、固形分濃度30質量%のポリマー溶液を調製した。得られた(メタ)アクリル系共重合体(b1)のMwは170万であり、Mw/Mnは5.5であった。
上記(1)で得られたポリマー溶液(固形分濃度30質量%)に含まれる(メタ)アクリル系共重合体の重合体(b1)100部に対して、下記の架橋剤1、架橋剤2、シランカップリング剤、帯電防止剤を下記の割合(いずれも固形分値)で混合して、粘着剤組成物を得た。
架橋剤2:エポキシ系架橋剤(綜研化学(株)製、E-5XM、固形分濃度5質量%) 0.02部
シランカップリング剤:3-グリドキシプロピルトリメトキシシラン(信越化学工業(株)製、KBM-403) 0.2部
帯電防止剤:「AS-804」(第一工業製薬(株)製) 1部
(3)粘着シートの作製
剥離処理されたポリエステルフィルム上に、上記(2)で得られた粘着剤組成物を泡抜け後、ドクターブレードを用いて液温25℃で塗布した。90℃で3分間乾燥させることにより、乾燥膜厚20μmの粘着剤層(B-1)を有する粘着シートを得た。
重合反応に用いたモノマー成分を表1に記載したとおりに変更したこと以外は製造例B1と同様に(1)(メタ)アクリル系共重合体のポリマー溶液の調製を行った。その後、製造例B1と同様に(2)粘着剤組成物の調製および(3)粘着シートの作製を行い、粘着剤層(B-2)~(B-5)を有する粘着シートを得た。
製造例C1aで得られたプライマー層の膜厚が0.1μmであるプライマー層付偏光板(C-1a)を使用し、製造例B1で得られた粘着シートの粘着剤層(B-1)を、前記プライマー層付偏光板のプライマー層が形成されている面に貼付した。この時、プライマー層付偏光板(C-1a)を製造してから、粘着剤層(B-1)を貼付するまでに要した時間は、1~5分であった。これを、23℃/50%RHの条件で7日間暗所に静置して熟成させて、粘着剤層付偏光板を得た。得られた粘着剤層付偏光板について、粘着力の測定、転着面積試験および耐熱耐久性試験を行った。結果を表2に示す。
実施例1において、プライマー層付偏光板および粘着剤層を表2または表3に記載したとおりに変更したこと以外は実施例1と同様にして、粘着剤層付偏光板を得た。なお、比較例1では、プライマー層を設けず、粘着剤層(B-1)を直接偏光板に貼付した。得られた粘着剤層付偏光板について、粘着力の測定、転着面積試験および耐熱耐久性試験を行った。結果を表2または表3に示す。
〔ゲル分率の測定〕
製造例B1~B5で得られた粘着シートから、粘着剤層約0.1gをサンプリング瓶に採取し、酢酸エチル30mLを加えて4時間振盪した後、このサンプル瓶の内容物を200メッシュのステンレス製金網で濾過し、金網上の残留物を100℃で2時間乾燥して乾燥重量を測定した。次式により、粘着剤層のゲル分率を求めた。
・ゲル分率(%)=(乾燥重量/粘着剤層採取重量)×100(%)
〔粘着力の測定〕
実施例および比較例で得られた粘着剤層付偏光板を70mm×25mmの大きさに裁断して試験片を作成した。試験片からポリエステルフィルムを剥離し、ラミネーターロールを用いて、粘着剤層/プライマー層/偏光板からなる積層体(比較例1で得られた粘着剤層付偏光板においては、粘着剤層/偏光板からなる積層体)を厚さ2mmのアルカリガラス板の片面に、粘着剤層とアルカリガラス板とが接するように貼着した。得られた積層体を、50℃/5気圧に調整されたオートクレーブ中に20分間保持した。次いで23℃/50%RH環境下に2時間以上放置した後、被着体のアルカリガラス板面に対して、剥離角度:180°方向、剥離速度:300mm/minで偏光板端部を引っ張り、粘着力(剥離強度)を測定した。
実施例および比較例で得られた粘着剤層付偏光板を70mm×25mmの大きさに裁断して試験片を作成した。試験片からポリエステルフィルムを剥離し、ラミネーターロールを用いて、粘着剤層/プライマー層/偏光板からなる積層体(比較例1で得られた粘着剤層付偏光板においては、粘着剤層/偏光板からなる積層体)を厚さ2mmのアルカリガラス板の片面に、粘着剤層とアルカリガラス板とが接するように貼着した。得られた積層体を、80℃/dry環境下に1時間放置した。その後、23℃/50%RH環境下でさらに1時間放置し、被着体のアルカリガラス板面に対して、剥離角度:180°方向、剥離速度:300mm/minで偏光板端部を引っ張り、ガラス面上に転着した粘着剤層を目視で確認した。転着面積0%は、転着が無く、粘着剤層および偏光板の密着性が良好であることを示し、転着面積100%は、全面が転着し、粘着剤層および偏光板の密着性が悪いことを示す。
実施例および比較例で得られた粘着剤層付偏光板を150mm×250mmの大きさに裁断して試験片を作成した。試験片からポリエステルフィルムを剥離し、ラミネーターロールを用いて、粘着剤層/プライマー層/偏光板からなる積層体(比較例1で得られた粘着剤層付偏光板においては、粘着剤層/偏光板からなる積層体)を厚さ2mmのガラス板の片面に、粘着剤層とガラス板とが接するように貼着した。得られた積層体を、50℃/5気圧に調整されたオートクレーブ中に20分間保持して、試験板を作成した。同様の試験板を2枚作成した。前記試験板を、温度100℃の条件下で500時間放置し、以下の基準で粘着剤層における発泡および剥れの発生を観察して評価した。発泡は凝集力不足の場合に発生し、剥がれは密着性不足または応力緩和不足の場合に発生する。
・AA:発泡・剥れが全く見られない。
・BB:発泡・剥れの面積が全体の5%未満である。
・CC:発泡・剥れの面積が全体の5%以上7%未満である。
・DD:発泡・剥れの面積が全体の7%以上である
Claims (7)
- 偏光板(A)と、
酸性官能基含有(メタ)アクリル系共重合体を含む粘着剤組成物から形成された粘着剤層(B)と、
前記偏光板(A)および前記粘着剤層(B)の間に、イソシアネート化合物を含むプライマー組成物から形成されたプライマー層(C)と
を有する粘着剤層付偏光板。 - 前記(メタ)アクリル系共重合体を形成するモノマー成分100質量%中、酸性官能基含有モノマーの含有量が、0.1~10質量%である、請求項1に記載の粘着剤層付偏光板。
- 前記(メタ)アクリル系共重合体を形成するモノマー成分100質量%中、水酸基含有モノマーの含有量が、0~10質量%である、請求項1または2に記載の粘着剤層付偏光板。
- 前記プライマー組成物の固形分100質量%中、イソシアネート化合物の含有量が、91質量%以上である、請求項1~3のいずれか1項に記載の粘着剤層付偏光板。
- 前記プライマー組成物が反応促進剤をさらに含む、請求項1~4のいずれか1項に記載の粘着剤層付偏光板。
- 前記プライマー層(C)の膜厚が5μm以下である、請求項1~5のいずれか1項に記載の粘着剤層付偏光板。
- 偏光板(A)の少なくとも一方の面に、イソシアネート化合物を含むプライマー組成物からなるプライマー層(C)を形成する工程と、
前記プライマー層(C)上に、酸性官能基含有(メタ)アクリル系共重合体を含む粘着剤組成物からなる粘着剤層(B)を形成する工程と
を含む粘着剤層付偏光板の製造方法。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2017507567A JPWO2016152275A1 (ja) | 2015-03-24 | 2016-02-05 | 粘着剤層付偏光板およびその製造方法 |
KR1020177019248A KR20170131347A (ko) | 2015-03-24 | 2016-02-05 | 점착제층 부착 편광판 및 그 제조 방법 |
CN201680015723.6A CN107407765A (zh) | 2015-03-24 | 2016-02-05 | 带粘合剂层的偏振片及其制造方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2015060904 | 2015-03-24 | ||
JP2015-060904 | 2015-03-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2016152275A1 true WO2016152275A1 (ja) | 2016-09-29 |
Family
ID=56977991
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2016/053466 WO2016152275A1 (ja) | 2015-03-24 | 2016-02-05 | 粘着剤層付偏光板およびその製造方法 |
Country Status (5)
Country | Link |
---|---|
JP (1) | JPWO2016152275A1 (ja) |
KR (1) | KR20170131347A (ja) |
CN (1) | CN107407765A (ja) |
TW (1) | TW201641285A (ja) |
WO (1) | WO2016152275A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2020027180A1 (ja) * | 2018-08-01 | 2020-02-06 | 綜研化学株式会社 | 粘着剤組成物および粘着テープ |
JP2020129103A (ja) * | 2019-02-08 | 2020-08-27 | 日本カーバイド工業株式会社 | 偏光板用粘着剤組成物、粘着剤層付偏光板、及び、車載表示装置 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002214439A (ja) * | 2001-01-23 | 2002-07-31 | Nitto Denko Corp | 粘着型光学フィルム |
JP2010037502A (ja) * | 2008-08-08 | 2010-02-18 | Toyo Ink Mfg Co Ltd | 感圧式接着剤組成物及び感圧式接着フィルム |
JP2013199652A (ja) * | 2009-04-30 | 2013-10-03 | Nitto Denko Corp | 光学フィルム用粘着剤組成物、光学フィルム用粘着剤層、粘着型光学フィルムおよび画像表示装置 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7208206B2 (en) * | 2003-03-10 | 2007-04-24 | Nitto Denko Corporation | Glass crack prevention laminate and liquid crystal display device |
KR100822142B1 (ko) * | 2005-10-20 | 2008-04-14 | 주식회사 엘지화학 | 신규한 유기 실란 화합물 |
-
2016
- 2016-02-05 JP JP2017507567A patent/JPWO2016152275A1/ja not_active Withdrawn
- 2016-02-05 CN CN201680015723.6A patent/CN107407765A/zh active Pending
- 2016-02-05 WO PCT/JP2016/053466 patent/WO2016152275A1/ja active Application Filing
- 2016-02-05 KR KR1020177019248A patent/KR20170131347A/ko not_active Application Discontinuation
- 2016-03-21 TW TW105108657A patent/TW201641285A/zh unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002214439A (ja) * | 2001-01-23 | 2002-07-31 | Nitto Denko Corp | 粘着型光学フィルム |
JP2010037502A (ja) * | 2008-08-08 | 2010-02-18 | Toyo Ink Mfg Co Ltd | 感圧式接着剤組成物及び感圧式接着フィルム |
JP2013199652A (ja) * | 2009-04-30 | 2013-10-03 | Nitto Denko Corp | 光学フィルム用粘着剤組成物、光学フィルム用粘着剤層、粘着型光学フィルムおよび画像表示装置 |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2020027180A1 (ja) * | 2018-08-01 | 2020-02-06 | 綜研化学株式会社 | 粘着剤組成物および粘着テープ |
JPWO2020027180A1 (ja) * | 2018-08-01 | 2021-08-02 | 綜研化学株式会社 | 粘着剤組成物および粘着テープ |
JP7256809B2 (ja) | 2018-08-01 | 2023-04-12 | 綜研化学株式会社 | 粘着剤組成物および粘着テープ |
JP2020129103A (ja) * | 2019-02-08 | 2020-08-27 | 日本カーバイド工業株式会社 | 偏光板用粘着剤組成物、粘着剤層付偏光板、及び、車載表示装置 |
JP7334604B2 (ja) | 2019-02-08 | 2023-08-29 | 日本カーバイド工業株式会社 | 偏光板用粘着剤組成物、粘着剤層付偏光板、及び、車載表示装置 |
Also Published As
Publication number | Publication date |
---|---|
TW201641285A (zh) | 2016-12-01 |
KR20170131347A (ko) | 2017-11-29 |
CN107407765A (zh) | 2017-11-28 |
JPWO2016152275A1 (ja) | 2018-01-25 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6556120B2 (ja) | 偏光板用粘着剤組成物、粘着剤層、粘着シートおよび粘着剤層付き偏光板 | |
JP6570280B2 (ja) | 光学部材用粘着剤および光学積層体 | |
WO2015141382A1 (ja) | 偏光板用粘着剤組成物、粘着剤層、粘着シートおよび粘着剤層付き偏光板 | |
WO2016059926A1 (ja) | 偏光板用粘着剤組成物、粘着シート、粘着剤層付き偏光板および積層体 | |
WO2015141383A1 (ja) | 偏光板用粘着剤組成物、粘着剤層、粘着シートおよび粘着剤層付き偏光板 | |
JP6530376B2 (ja) | 偏光板用粘着剤組成物、粘着シートおよび粘着剤層付き偏光板 | |
WO2015076066A1 (ja) | 光学フィルム用粘着剤組成物、粘着型光学フィルムおよび積層体 | |
WO2019087816A1 (ja) | 粘着剤組成物、粘着剤、及び粘着シート | |
JP6463167B2 (ja) | 光学部材用粘着剤および光学積層体 | |
JP2015205974A (ja) | 偏光板用粘着剤組成物、粘着シート、粘着剤層付き偏光板および積層体 | |
WO2016072198A1 (ja) | 偏光板用粘着剤組成物および粘着剤層付き偏光板 | |
WO2016203935A1 (ja) | 偏光板用の粘着剤組成物、粘着剤層および粘着シート、ならびに粘着剤層付き偏光板 | |
WO2017029959A1 (ja) | 偏光板用の粘着剤層および粘着剤組成物 | |
WO2015141379A1 (ja) | 偏光板用粘着剤組成物、粘着シートおよび粘着剤層付き偏光板 | |
JP6644698B2 (ja) | 偏光板用粘着剤組成物および粘着剤層付き偏光板 | |
WO2016152275A1 (ja) | 粘着剤層付偏光板およびその製造方法 | |
WO2021075188A1 (ja) | 粘着剤組成物および粘着シート | |
WO2016072199A1 (ja) | 偏光板用粘着剤組成物および粘着剤層付き偏光板 | |
WO2016129353A1 (ja) | 偏光板用粘着剤組成物およびその用途 | |
WO2022185715A1 (ja) | 粘着剤組成物、粘着シートおよび光学部材 | |
WO2017043241A1 (ja) | (メタ)アクリル系重合体の製造方法および粘着剤層の製造方法 | |
WO2023136052A1 (ja) | 偏光板用粘着剤組成物および粘着剤層付き偏光板 | |
WO2016072200A1 (ja) | 偏光板用粘着剤組成物および粘着剤層付き偏光板 | |
JP2017025128A (ja) | 偏光板用粘着剤組成物および粘着剤層付き偏光板 | |
WO2017018125A1 (ja) | 偏光板用粘着剤組成物、粘着剤層および粘着剤層付偏光板 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 16768178 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 20177019248 Country of ref document: KR Kind code of ref document: A |
|
ENP | Entry into the national phase |
Ref document number: 2017507567 Country of ref document: JP Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 16768178 Country of ref document: EP Kind code of ref document: A1 |