CN104592905A - Light-diffusing adhesive layer and light-diffusing adhesive film - Google Patents
Light-diffusing adhesive layer and light-diffusing adhesive film Download PDFInfo
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- CN104592905A CN104592905A CN201410546694.9A CN201410546694A CN104592905A CN 104592905 A CN104592905 A CN 104592905A CN 201410546694 A CN201410546694 A CN 201410546694A CN 104592905 A CN104592905 A CN 104592905A
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- diffusion bonding
- oxidant layer
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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
- C09J133/04—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
- C09J133/12—Homopolymers or copolymers of methyl methacrylate
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- 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
- C09J133/062—Copolymers with monomers not covered by C09J133/06
- C09J133/066—Copolymers with monomers not covered by C09J133/06 containing -OH groups
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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
- C09J133/04—Homopolymers or copolymers of esters
- C09J133/14—Homopolymers or copolymers of esters of esters containing halogen, nitrogen, sulfur or oxygen atoms in addition to the carboxy oxygen
-
- 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
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0268—Diffusing elements; Afocal elements characterized by the fabrication or manufacturing method
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
- C09J2203/318—Applications of adhesives in processes or use of adhesives in the form of films or foils for the production of liquid crystal displays
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
- C09J2301/312—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier parameters being the characterizing feature
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- Optics & Photonics (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Adhesive Tapes (AREA)
- Optical Elements Other Than Lenses (AREA)
- Polarising Elements (AREA)
- Laminated Bodies (AREA)
Abstract
A light-diffusing adhesive layer provided by the invention is an optical part which can be used in a mode of replacing previous light-diffusing plates. The light-diffusing adhesive layer has a function of a light-diffusing sheet and can realize thinning of a display. The invention also provides a light-diffusing adhesive film using the light-diffusing adhesive layer. The light-diffusing adhesive layer is a light-diffusing adhesive layer having a light diffusing function. The light-diffusing adhesive layer is formed by adhesive compositions containing polymers and cross-linking agents of silicon particles. The polymer contains at least one kind of alkyl (methyl) alkyl acrylate monomers with carbon atom numbers being C1-C14 and at least one kind of selected from polymerized monomers containing hydroxyls, polymerized monomers containingcarboxyls, monomers containing nitrogen vinyls and aromaticmonomers and used as monomers containing functional groups which can be polymerized. The transmittance of the light-diffusing adhesive is more than 90%, the haze value is more than 40% and the refractive index is more than 1.47.
Description
Technical field
The present invention relates to a kind of smooth diffusion bonding oxidant layer, employ the light diffusion bonding film of this light diffusion bonding oxidant layer.More specifically, the present invention relates to a kind of mainly as the component parts in liquid-crystal display, for fitting optics and the light diffusion bonding film be fixed.Particularly, there is provided a kind of there is the visual person side being laminated in backlight of LCD light diffusing sheet function and the light diffusion bonding oxidant layer of filming (slimming of display thickness) can be realized because not using light diffusing sheet, and employ the light diffusion bonding film of this light diffusion bonding oxidant layer.
Background technology
In recent years, manufacture, the sales volume of the liquid-crystal display centered by medium and small-sized increase gradually.In addition, along with the increase to medium and small-sized liquid crystal displays demand, constantly require the further simplification of display device structure and the filming of optics, thus reduce manufacturing cost and realize the slimming of display panel thickness.
Relative to above-mentioned problem, in order to by adhesive layer by the optical member adhering such as Polarizer, polarizer in the adherend such as liquid crystal cells, proposed the various adhesive film (for example, referring to patent documentation 1 ~ 2) with good adhesion power.
Describe a kind of using the optics adhesive composition as the monomer of main component and containing acrylamide compound etc. such as butyl acrylate in patent documentation 1.
Describe in patent documentation 2 a kind of using have carbonatoms be the alkyl of 4 ~ 8 (methyl) acrylate as main component monomer and there is the optics adhesive composition of carboxylic monomer and nitrogenous vinyl monomer.
In addition, propose to improve the specific refractory power of adhesive layer and the multiple adhesive film (for example, referring to patent documentation 3 ~ 9) through repeatedly studying.
Describe in patent documentation 3 and a kind ofly there is aromatic ring and be the optics adhesive composition of the tackifier of 1.51 ~ 1.75 containing specific refractory power.
Describe a kind of bonding sheet comprising adhesive composition containing copolymerization polymkeric substance in patent documentation 4, described copolymerization polymkeric substance is the copolymerization polymkeric substance of the acrylic acid modified monomer containing aromatic ring.
A kind of optics adhesive composition comprising tackifying resin containing aromatic ring and aromatic phosphoric ester class softening agent is described in patent documentation 5.
Describe a kind of binding agent solidified by adhesive composition in patent documentation 6, described adhesive composition comprises: acrylic resin; And contain the aromatics of an ethene unsaturated group.
A kind of optical element by phase retardation film and birefringent plate being interfixed containing the acrylic adhesive of aromatic monomer is described in patent documentation 7.
Describe a kind of adhesive composition containing urethane resin in patent documentation 8, described urethane resin is that aromatic diisocyanate and the reaction of aromatic polyester glycol are formed.
Describe in patent documentation 9 and a kind ofly in the adhesion resins such as acrylate copolymer, add the linking agents such as isocyanic ester and the light diffusing agent that is made up of resin particles such as styrene resin beads and the light diffusing adhesive composition obtained.
Prior art document
Patent documentation
Patent documentation 1: Japanese Unexamined Patent Publication 2012-177022 publication
Patent documentation 2: Japanese Unexamined Patent Publication 2012-201734 publication
Patent documentation 3: Japanese Unexamined Patent Publication 2007-084762 publication
Patent documentation 4: Japanese Unexamined Patent Publication 2011-153169 publication
Patent documentation 5: Japanese Unexamined Patent Publication 2012-167188 publication
Patent documentation 6: Japanese Unexamined Patent Publication 2012-021148 publication
Patent documentation 7: Japanese Unexamined Patent Publication 2006-293281 publication
Patent documentation 8: Japanese Unexamined Patent Publication 2009-091522 publication
Patent documentation 9: Japanese Unexamined Patent Publication 7-216328 publication
Summary of the invention
The problem that invention will solve
In recent years, in order to realize the filming of optics, as the adhesive film that the interlayer for optics is fitted, require that it is the adhesive film that the thickness of adhesive layer is thinned to less than 20 μm.
Usually, the cohesive force of adhesive layer and the thickness of adhesive layer roughly proportional, therefore, if by the lower thickness of adhesive layer, then cohesive force can be caused to reduce thereupon.
But, require that adhesive film has following performance in recent years: even if by the lower thickness of adhesive layer, also there is the cohesive force equal with adhesive film (adhesive layer is the thick-layer that thickness is about 30 μm) in the past, and for the weather resistance after placement long-time under high temperature, high humidity environment, also there is the equal above performance with adhesive film in the past.
In addition, from the view point of can making the lower thickness of adhesive layer and the adhesive layer without the need to implementing ageing treatment (implementing slaking at a constant temperature) can being formed, requirement is formed as NCF (Non Carrier Film, non-bearing film) form, it is only made up of the adhesive layer after eliminating adhesive film base material and the parts with " mold release film/adhesive layer/mold release film " are formed.
In addition, in adhesive film in the past, owing to implementing ageing treatment after adhesive film of fitting in adherend, therefore, it is possible to improve the tack between adherend and adhesive layer.
But for the adhesive film adopting NCF form, owing to completing the ageing treatment of adhesive layer, the tack therefore between adherend and adhesive layer is not enough.Based on this, exist and need to carry out the surface-treated problems such as corona treatment to the surface of adherend.
Therefore a kind of adhesive film meeting these and require and overcome these problems is needed.
Problem of the present invention is the light diffusion bonding film providing a kind of smooth diffusion bonding oxidant layer, employ this light diffusion bonding oxidant layer, wherein, this light diffusion bonding oxidant layer to substitute the optics that light diffusing sheet in the past used, it has the function of light diffusing sheet, and can realize the slimming of display thickness.
Solve the method for problem
In order to solve above-mentioned problem, the technological thought of smooth diffusion bonding oxidant layer of the present invention is, light diffusion bonding oxidant layer is formed by the adhesive layer comprising multipolymer and linking agent and silicon microparticle, wherein, described multipolymer comprises: the carbonatoms of alkyl is more than at least one in (methyl) alkyl acrylate monomer of C1 ~ C14; And as containing can the monomer of functional group of copolymerization be selected from the copolymerization monomer of hydroxyl, carboxylic copolymerization monomer, nitrogenous vinyl monomer, containing more than at least one in aromatic monomer.
In addition, in order to solve above-mentioned problem, the invention provides a kind of light diffusion bonding oxidant layer, it is the light diffusion bonding oxidant layer with light diffusion function, and described smooth diffusion bonding oxidant layer is formed by the adhesive composition containing multipolymer and linking agent and silicon class particle; Described multipolymer comprises: the carbonatoms of alkyl is more than at least one in (methyl) alkyl acrylate monomer of C1 ~ C14; And as containing can the monomer of functional group of copolymerization be selected from by more than at least one in the copolymerization monomer of hydroxyl, carboxylic copolymerization monomer, nitrogenous vinyl monomer and the group that forms containing aromatic monomer, and the transmitance of described smooth diffusion bonding oxidant layer is more than 90%, haze value is more than 40%, specific refractory power is more than 1.47.
In addition, be more than 2.0N/25mm relative to the cohesive force of sheet glass when the thickness of preferred aforementioned smooth diffusion bonding oxidant layer is 20 μm.
In addition, preferred foregoing adhesives composition is the isocyanate compound as linking agent containing 0.01 ~ 5 weight part relative to the multipolymer of 100 weight parts, the silicon class particle of 0.5 ~ 20 weight part forms, wherein, described multipolymer is more than at least one in (methyl) alkyl acrylate monomer of C1 ~ C14 by the carbonatoms of alkyl, and as containing the monomer of functional group of copolymerization being selected from the copolymerization monomer of hydroxyl, carboxylic copolymerization monomer, nitrogenous vinyl monomer and containing the weight-average molecular weight more than at least one in aromatic monomer formed be 20 ~ 2,500,000 multipolymer.
In addition, the haze value of preferred aforementioned smooth diffusion bonding oxidant layer is more than 40% and less than 90%.
In addition, preferred aforementioned silicon class particle be selected from the group that is made up of silicon dioxide granule, silicon-dioxide trimeric cyanamide core-shell particles, silicone particle more than one.
In addition, the invention provides a kind of one side in mold release film and be formed with described smooth diffusion bonding oxidant layer and the light diffusion bonding film with the formation of mold release film/light diffusion bonding oxidant layer/mold release film.
In addition, the invention provides the light diffusion bonding film of the stacked aforementioned smooth diffusion bonding oxidant layer of a kind of one side at base material.
In addition, the invention provides a kind of Polarizer peripheral components adhesive film employing aforementioned smooth diffusion bonding film.
In addition, the invention provides the adhesive film that a kind of interlayer between Polarizer and brightness enhancement film employs aforementioned smooth diffusion bonding oxidant layer.
In addition, the invention provides a kind of blooming with adhesive layer, it is laminated with aforementioned smooth diffusion bonding oxidant layer at least one face of blooming.
Invention effect
Based on the present invention, a kind of smooth diffusion bonding oxidant layer can be provided and employ the light diffusion bonding film of this light diffusion bonding oxidant layer, described smooth diffusion bonding oxidant layer overcomes requirement item in the past and problem thus can substitute the optics that light diffusing sheet in the past used, and has the function of light diffusing sheet and can realize the slimming of display thickness.
Embodiment
Below, based on preferred embodiment the present invention being described.
Smooth diffusion bonding oxidant layer of the present invention is the light diffusion bonding oxidant layer with light diffusion function, aforementioned smooth diffusion bonding oxidant layer is formed by the adhesive composition containing acrylic polymers and silicon class particle, the transmitance of aforementioned smooth diffusion bonding oxidant layer is more than 90%, haze value is more than 40%, and specific refractory power is more than 1.47.
In addition, the haze value of preferred aforementioned smooth diffusion bonding oxidant layer is more than 40% and less than 90%.In addition, preferred aforementioned smooth diffusion bonding oxidant layer is formed by the adhesive composition containing multipolymer (acrylic polymers) and linking agent and silicon class particle, and described multipolymer comprises: the carbonatoms of alkyl is more than at least one in (methyl) alkyl acrylate monomer of C1 ~ C14; And as containing can being selected from by more than at least one in the copolymerization monomer of hydroxyl, carboxylic copolymerization monomer, nitrogenous vinyl monomer and the group that forms containing aromatic monomer of monomer of functional group of copolymerization.
In addition, in foregoing adhesives composition, preferably relative to acrylic polymers (multipolymer) 100 weight part of adhesive composition, more than at least one in (methyl) alkyl acrylate monomer that the carbonatoms of the alkyl containing 50 ~ 98 weight parts is C1 ~ C14 and 2 ~ 50 weight parts as containing the monomer of functional group of copolymerization being selected from the monomer containing functional group more than by least one in the copolymerization monomer of hydroxyl, carboxylic copolymerization monomer, nitrogenous vinyl monomer and the group that forms containing aromatic monomer, and, for the mixing ratio of the aforementioned monomer containing functional group, relative to 100 weight parts (methyl) alkyl acrylate monomer as main component, the carbonatoms of alkyl is (methyl) alkyl acrylate monomer of C1 ~ C14, coordinate the copolymerization monomer of the hydroxyl of 0.1 ~ 50 weight part, the carboxylic copolymerization monomer of 0 ~ 5 weight part (when containing being 0.1 ~ 5 weight part sometimes), the nitrogenous vinyl monomer of 0 ~ 50 weight part (when containing being 5 ~ 50 weight parts sometimes), 0 ~ 30 weight part (when containing being 5 ~ 30 weight parts sometimes) containing aromatic monomer.
In addition, relative to the multipolymer of 100 weight parts, preferably containing the isocyanate compound of 0.01 ~ 5 weight part as linking agent, the silicon class particle of 0.5 ~ 20 weight part.
Carbonatoms as alkyl is (methyl) alkyl acrylate monomer of C1 ~ C14, can exemplify: (methyl) methyl acrylate, (methyl) ethyl propenoate, (methyl) propyl acrylate, (methyl) isopropyl acrylate, (methyl) butyl acrylate, (methyl) isobutyl acrylate, (methyl) amyl acrylate, (methyl) Ethyl acrylate, (methyl) heptylacrylate, (methyl) Octyl acrylate, (methyl) Isooctyl acrylate monomer, (methyl) 2-EHA, (methyl) vinylformic acid ester in the ninth of the ten Heavenly Stems, (methyl) vinylformic acid ester in the different ninth of the ten Heavenly Stems, (methyl) decyl acrylate, (methyl) vinylformic acid undecyl ester, (methyl) dodecylacrylate, (methyl) tridecyl acrylate, (methyl) vinylformic acid tetradecyl ester, (methyl) vinylformic acid ring pentyl ester, more than at least one in (methyl) cyclohexyl acrylate etc.Alkyl in (methyl) alkyl acrylate monomer can be any one in straight-chain, branched, ring-type.Relative to acrylic polymers (multipolymer) 100 weight part of adhesive composition, the carbonatoms of preferred alkyl is the ratio of (methyl) alkyl acrylate monomer of C1 ~ C14 is 50 ~ 98 weight parts.
As the copolymerization sex ethylene base monomer (containing aromatic monomer) containing aryl, (methyl) benzyl acrylate can be enumerated, (methyl) vinylformic acid naphthalene ester, (methyl) phenoxyethyl acrylate, (methyl) vinylformic acid benzene oxygen butyl ester, (methyl) vinylformic acid 2-(1-naphthyloxy) ethyl ester, (methyl) vinylformic acid 2-(2-naphthyloxy) ethyl ester, (methyl) vinylformic acid 6-(1-naphthyloxy) own ester, (methyl) vinylformic acid 6-(2-naphthyloxy) own ester, (methyl) vinylformic acid 8-(1-naphthyloxy) monooctyl ester, (methyl) vinylformic acid 8-(2-naphthyloxy) monooctyl esters etc. are containing aromatic acrylic monomer, vinylbenzene etc. are containing aromatic vinyl monomer.In order to obtain the high adhesive layer of specific refractory power, preferably coordinate at least more than one containing aromatic monomer.
By these are mixed with (methyl) alkyl acrylate monomer as the atomic number of alkyl carbon of main component monomer being C1 ~ C14 containing aromatic monomer, the specific refractory power of obtained light diffusion bonding oxidant layer can be made to improve and adjust, reduce the refringence between optics, reduce total reflection, can total light transmittance be improved thus.In smooth diffusion bonding oxidant layer of the present invention, when adhesive composition comprises containing aromatic monomer, relative to 100 weight parts (methyl) alkyl acrylate monomer as main component, the content preferably containing aromatic monomer is 5 ~ 30 weight parts.
As nitrogenous vinyl monomer, such as, can enumerate the ring-type nitrogen vinyl compounds such as NVP, N-caprolactam, (methyl) acryloyl morpholine, N-ethyl-N-methyl (methyl) acrylamide, N-Methyl-N-propyl (methyl) acrylamide, N-methyl-N-isopropyl (methyl) acrylamide, N, N-dimethyl (methyl) acrylamide, N, N-diethyl (methyl) acrylamide, N, N-dipropyl (methyl) acrylamide, N, the dialkyl group such as N-di-isopropyl (methyl) acrylamide, N, N-dibutyl (methyl) acrylamide replace (methyl) acrylamide, (methyl) vinylformic acid N-ethyl-N-methyl ammonia ethyl ester, (methyl) vinylformic acid N-Methyl-N-propyl ammonia ethyl ester, (methyl) vinylformic acid N-methyl-N-isopropyl ammonia ethyl ester, (methyl) vinylformic acid N, N-dimethylamino methyl esters, (methyl) vinylformic acid N, N-dimethylamino ethyl ester, (methyl) vinylformic acid N, N-dimethylamino propyl ester, (methyl) vinylformic acid N, N-dimethylamino butyl ester, (methyl) vinylformic acid N, N-dipropyl ammonia ethyl ester, (methyl) vinylformic acid N, (methyl) propenoic acid dialkyl ammonia esters such as N-dibutylamine ethyl ester, N-ethyl-N-methyl aminopropyl (methyl) acrylamide, N-Methyl-N-propyl aminopropyl (methyl) acrylamide, N-methyl-N-isopropyl aminopropyl (methyl) acrylamide, N, N-dimethyl aminopropyl (methyl) acrylamide, N, N-diethylaminopropyl (methyl) acrylamide, N, N-dipropyl aminopropyl (methyl) acrylamide, N, N-dimethylaminoethyl (methyl) acrylamide, N, more than at least one in dialkyl group substituted-amino alkyl (methyl) acrylamides such as N-diethyl aminoethyl (methyl) acrylamide etc.
In order to the copolymerization monomer of hydroxyl described later can be different from, be preferably the monomer not containing hydroxyl as aforementioned nitrogenous vinyl monomer, be more preferably the monomer not containing hydroxyl and carboxyl.As such monomer, preferred above-mentioned illustrative monomer, such as, the acrylic monomer containing N, N-dialkyl group substituted-amino or N, N-dialkyl group substituted amido; The N-vinyl substituted lactams of NVP, N-caprolactam etc.; N-(methyl) the acryl substituted cyclic amine of N-(methyl) acryloyl morpholine etc.
In addition, in smooth diffusion bonding oxidant layer of the present invention, the nitrogenous vinyl monomer contained by adhesive composition, can give cohesive force and the weather resistance of light diffusion bonding oxidant layer necessity.In smooth diffusion bonding oxidant layer of the present invention, relative to 100 weight parts (methyl) alkyl acrylate monomer as main component, the content of the nitrogenous vinyl monomer contained in preferred binder composition is 5 ~ 50 weight parts.
In addition, in smooth diffusion bonding oxidant layer of the present invention, as the nitrogenous vinyl monomer that adhesive composition contains, particularly preferably use NVP, N, N-dimethyl (methyl) acrylamide, N, N-diethyl (methyl) acrylamide, N, N-dipropyl (methyl) acrylamide, N, N-di-isopropyl (methyl) acrylamide, N, N-dibutyl (methyl) acrylamide, N, N-dimethyl aminopropyl (methyl) acrylamide, N, N-diethylaminopropyl (methyl) acrylamide, N, N-dimethylaminoethyl (methyl) acrylamide, N-caprolactam etc.
As the copolymerizable vinyl monomer (carboxylic copolymerization monomer) containing carboxyl, can exemplify: (methyl) vinylformic acid, (methyl) carboxy ethyl acrylate, methacrylic acid carboxylic pentyl ester, 2-(methyl) acryloyl-oxyethyl hexahydrophthalic acid, 2-(methyl) acryloxypropyl hexahydrophthalic acid, 2-(methyl) acryloyl-oxyethyl phthalic acid, 2-(methyl) acryloyl-oxyethyl succsinic acid, 2-(methyl) acryloyl-oxyethyl toxilic acid, carboxy-polycaprolactone list (methyl) acrylate, more than at least one in 2-(methyl) acryloyl-oxyethyl tetrahydrophthalic acid etc.
In addition, in smooth diffusion bonding oxidant layer of the present invention, the carboxylic copolymerization monomer contained by adhesive composition can give the cohesive force of light diffusion bonding oxidant layer necessity.In smooth diffusion bonding oxidant layer of the present invention, adhesive composition also can not contain carboxylic copolymerization monomer, but when containing sometimes, relative to 100 weight parts (methyl) alkyl acrylate monomer as main component, the content of preferred carboxylic copolymerization monomer is 0.1 ~ 5 weight part.
As the copolymerization sex ethylene base monomer (the copolymerization monomer of hydroxyl) of hydroxyl, such as can enumerate (methyl) hydroxyalkyl acrylates classes such as (methyl) vinylformic acid 8-hydroxyl monooctyl ester, the own ester of (methyl) vinylformic acid 6-hydroxyl, (methyl) vinylformic acid 4-hydroxybutyl, (methyl) Hydroxyethyl Acrylate, more than at least one in (methyl) acrylic amide of the hydroxyls such as N-hydroxyl (methyl) acrylamide, N-methylol (methyl) acrylamide, N-hydroxyethyl (methyl) acrylamide etc.
In addition, in smooth diffusion bonding oxidant layer of the present invention, the copolymerization monomer of the hydroxyl contained by adhesive composition, can use as the copolymerization monomer of the content for reducing carboxylic copolymerization monomer, and described carboxylic monomer makes obtained light diffusion bonding oxidant layer produce corrosive effects to corrosion-prone adherend such as the ITO surfaces of transparent and electrically conductive film.Therefore, the copolymerization monomer of hydroxyl can contribute to the cohesive force of raising light diffusion bonding oxidant layer and reduce corrodibility.In smooth diffusion bonding oxidant layer of the present invention, relative to 100 weight parts (methyl) alkyl acrylate monomer as main component, the content of the copolymerization monomer of the hydroxyl contained in preferred binder composition is 0.1 ~ 50 weight part.
The acrylic polymers of the adhesive composition used in smooth diffusion bonding oxidant layer of the present invention, be preferably more than at least one in (methyl) alkyl acrylate monomer that is C1 ~ C14 by the carbonatoms of alkyl, with as containing can the monomer of functional group of copolymerization be selected from the copolymerization monomer of hydroxyl, carboxylic copolymerization monomer, nitrogenous vinyl monomer and contain group that aromatic monomer forms at least one more than the weight-average molecular weight that formed be 20 ~ 2,500,000 multipolymer.
To the polymerization process of multipolymer, there is no particular limitation, can use the known polymerization process that solution polymerization process, emulsion polymerization etc. are suitable.The weight-average molecular weight of multipolymer is preferably 200,000 ~ 2,500,000.
Above-mentioned multipolymer is preferably acrylic polymers, preferably contains the acrylic monomer 50 ~ 100 % by weight of (methyl) acrylate monomer or (methyl) vinylformic acid, (methyl) acrylic amide etc.
In foregoing adhesives composition, by coordinating the silicon class particle as light diffusing agent in above-mentioned multipolymer (acrylic polymers), required optical characteristics (transmitance, haze value) can be given.And then, by coordinating linking agent, suitable any additive, the characteristics such as required physical properties can be adjusted.
As silicon class particle, in the single particle that can be selected from silicon-containing compound or composite particles, specifically, silicon dioxide granule, silicon-dioxide trimeric cyanamide core-shell particles, silicone particle, silicate glass particle etc. can be enumerated.Preferably be selected from the group be made up of silicon dioxide granule, silicon-dioxide trimeric cyanamide core-shell particles, silicone particle more than one.Silicon-dioxide trimeric cyanamide core-shell particles is the composite particles with the core of trimeric cyanamide and the shell of silicon-dioxide.This composite particles has the structure fine particle of colloid silica (nanoparticle) being closely filled in the surface of trimeric cyanamide particle.As silicone particle, silicone resin particle, silicone rubber particle, cross-linked silicone particle etc. can be enumerated.
In the adhesive composition that smooth diffusion bonding oxidant layer of the present invention uses, relative to the acrylic polymers of 100 weight parts, the silicon class particle preferably containing 0.5 ~ 20 weight part.
As linking agent, can exemplify: the biuret modified body of the diisocyanates of hexamethylene diisocyanate, isophorone diisocyanate, diphenylmethanediisocyanate, tolylene diisocyanate, xylylene diisocyanate etc. or isocyanurate-modified body, with the trivalent such as TriMethylolPropane(TMP) or glycerol more than polyvalent alcohol affixture etc. polyisocyanate compounds, metal species inner complex, epoxy compounds etc. at least one more than.In addition, also binding agent can be cross-linked by photo-crosslinkings such as ultraviolets.
When using linking agent to make crosslinking copolymers, preferred copolymer has can carry out functional group's (kind according to linking agent can select hydroxyl or carboxyl etc.) of crosslinking reaction with linking agent, and preferably containing the monomer at side chain with these functional groups.In addition, relative to the multipolymer of 100 weight parts, preferred binder composition contains the isocyanate compound of 0.01 ~ 5 weight part as linking agent.
As other any composition, the known additives such as silane coupling agent, antioxidant, tensio-active agent, curing catalyst, softening agent, weighting agent, crosslinking catalyst, cross-linked inhibitor, curing inhibitors, processing aid, antiaging agent can be coordinated aptly.These both may be used singly or in combination of two or more use.
Smooth diffusion bonding oxidant layer of the present invention makes adhesive composition crosslinked and obtains after can passing through to be coated with above-mentioned adhesive composition on base material or mold release film.
For the adhesive layer of the interlayer laminating etc. of optics, desirably thin adhesive layer, the thickness of preferred aforementioned smooth diffusion bonding oxidant layer is 1 μm ~ 20 μm.In addition, the cohesive force of usual adhesive layer and the thickness of adhesive layer roughly proportional, but be more than 2.0N/25mm to the cohesive force of sheet glass when in the present invention, the thickness of preferred light diffusion bonding oxidant layer is 20 μm.In addition, when the thickness of adhesive layer is not 20 μm, the thickness of adhesive layer is set as T (μm), the cohesive force of adhesive layer is set as F (N/25mm) by " cohesive force during thickness 20 μm " (N/25mm), and is calculated by formula " (cohesive force during thickness 20 μm)=20F/T ".
When smooth diffusion bonding oxidant layer of the present invention being used in the interlayer laminating of optics etc., the transmitance of preferred light diffusion bonding oxidant layer is more than 90%, haze value is more than 40%, specific refractory power is more than 1.47.Preferred haze value is more than 40% and less than 90%.In order to reduce the light reflection between light diffusion bonding oxidant layer and optics on interface, wish that refringence is little as far as possible.Therefore, the specific refractory power of above-mentioned smooth diffusion bonding oxidant layer is preferably 1.47 ~ 1.50.
Smooth diffusion bonding film of the present invention manufactures by forming smooth diffusion bonding oxidant layer of the present invention at the one side of base material or mold release film.
As for the formation of the base material film of light diffusion bonding oxidant layer or the mold release film (barrier film) of protection adhesive surface, the resin moldings etc. such as polyester film can be used.
For base material film, can on the face contrary with being formed with light diffusion bonding oxidant layer side of resin molding, implement the antifouling process undertaken by releasing agent or coating-forming agent, the silicon dioxide microparticle etc. of silicone, fluorine class, the antistatic treatment of being undertaken by the coating of static inhibitor or be mixed into etc. can be implemented.
For mold release film, carry out fitting on the face of side at the adhesive surface with light diffusion bonding oxidant layer, implement the demoulding process undertaken by the releasing agent etc. of silicone, fluorine class.
By the face implementing demoulding process of mold release film of fitting respectively on the two sides of a light diffusion bonding oxidant layer, the formation of " mold release film/light diffusion bonding oxidant layer/mold release film " can be formed.In the case, by by the mold release film of both sides successively or peel off and expose adhesive surface simultaneously, can with the optical member adherings such as blooming.As blooming, light polarizing film, phase retardation film, antireflection film, anti-dazzle (anti-glare) film, ultraviolet-absorbing film, infrared absorbing film, optical compensation films, brightness enhancement film etc. can be enumerated.Such as, preferably make by light diffusion bonding oxidant layer at the interlayer of Polarizer and brightness enhancement film.
Smooth diffusion bonding film of the present invention can be used in the laminating of the various blooming of peripheral components of the liquid-crystal display based on Polarizer, the various blooming of touch panel, the various blooming of Electronic Paper, organic EL various bloomings etc.
In addition, light diffusion bonding oxidant layer can be stated at least one upper strata, face prestack of these bloomings and the blooming prepared with adhesive layer.Particularly, the formation of " blooming/light diffusion bonding oxidant layer/blooming ", " blooming/light diffusion bonding oxidant layer/mold release film ", " blooming/light diffusion bonding oxidant layer ", " blooming/light diffusion bonding oxidant layer/blooming/light diffusion bonding oxidant layer/blooming ", " blooming/light diffusion bonding oxidant layer/blooming/light diffusion bonding oxidant layer/mold release film ", " mold release film/light diffusion bonding oxidant layer/blooming/light diffusion bonding oxidant layer/mold release film " etc. can be enumerated.When blooming two-sided on adhesive layer is set time, also only its one side can be arranged to light diffusion bonding oxidant layer.
Such as; have when carrying out with mold release film the light diffusion bonding oxidant layer protected as " blooming/light diffusion bonding oxidant layer/mold release film "; peel mold release film off and expose the light diffusion bonding oxidant layer as " blooming/light diffusion bonding oxidant layer "; and fit with other blooming, the formation as " blooming/light diffusion bonding oxidant layer/blooming " light diffusion bonding oxidant layer being used for interlayer laminating can be obtained thus.
Embodiment
Below, the present invention is illustrated based on embodiment.
The manufacture > of < acrylic copolymer
[embodiment 1]
Nitrogen is imported in the reaction unit being furnished with agitator, thermometer, reflux exchanger and nitrogen ingress pipe, thus the air with nitrogen replacement in reaction unit.Then, in reaction unit, add the butyl acrylate of 90 weight parts, the vinylformic acid 4-hydroxybutyl of 1.0 weight parts, the acrylamide of 9 weight parts, and add the solvent (vinyl acetic monomer) of 60 weight parts simultaneously.Then, through the Diisopropyl azodicarboxylate as polymerization starter of 2 hours instillation 0.1 weight parts, at 65 DEG C, make it react 6 hours, obtain weight-average molecular weight be 700,000, for the acrylic acid copolymer soln 1 of embodiment 1.Get a part for acrylic copolymer, use as determination of acid value sample described later.
[embodiment 2 ~ 5 and comparative example 1 ~ 3]
Except have adjusted the composition of each monomer described in (A), (B), (C) of such as table 1, (D), (E) respectively, operate in the same manner as the above-mentioned acrylic acid copolymer soln 1 for embodiment 1, obtain the acrylic acid copolymer soln for embodiment 2 ~ 5 and comparative example 1 ~ 3.
The preparation > of < adhesive composition, light diffusion bonding oxidant layer and light diffusion bonding film
[embodiment 1]
In the acrylic acid copolymer soln 1 of the embodiment 1 manufactured as mentioned above, add the Coronate L-45 (affixture of tolylene diisocyanate (TDI) compound) of 0.1 weight part and the silicon-dioxide trimeric cyanamide core-shell particles (particle diameter 2 μm) of 3.0 weight parts and be uniformly mixed, obtaining the adhesive composition of embodiment 1.By this adhesive composition, be coated on after on the stripping film that is made up of the polyethylene terephthalate scribbling silicone resin (PET) film, at 90 DEG C of temperature, carry out drying and remove solvent, then, 23 DEG C, slaking 7 days under the environment of 50%RH, thus obtain the light diffusion bonding film of the embodiment 1 on the one side of stripping film with the light diffusion bonding oxidant layer (thickness 20 μm) making adhesive composition be cross-linked.
[embodiment 2 ~ 5 and comparative example 1 ~ 3]
Except have adjusted the composition of additive respectively as described in (F), (G) of table 1 except, operate in the same manner as the light diffusion bonding film of above-described embodiment 1, obtain the light diffusion bonding film of embodiment 2 ~ 5 and comparative example 1 ~ 3.
Table 1
In Table 1, the weight part proportioning of each composition of the numeric representation in bracket.Weight part sets the mode adding up to about 100 weight parts that monomer total amount, i.e. (A) ~ (D) organize to obtain.Wherein, the monomer total amount of embodiment 2 is 105 weight parts, the monomer total amount of embodiment 3 is 92 weight parts, the monomer total amount of comparative example 2 is 110.5 weight parts, the monomer total amount of comparative example 3 is 110 weight parts.
In addition, the compound title of the abbreviation correspondence of each composition used in table 1 is shown in Table 2.At this, Coronate (コ ロ ネ ー ト, registered trademark) L-45 is the trade name of Nippon Polyurethane Industry Co., Ltd., and D-11ON is the trade name of Mitsui Chemicals, Inc.TDI nail phenylene diisocyanate, XDI refers to xylylene diisocyanate.
Table 2
< test method and evaluation >
Peel stripping film (scribbling the PET film of silicone resin) off from the light diffusion bonding film of embodiment 1 ~ 5 and comparative example 1 ~ 3 and expose light diffusion bonding oxidant layer, and light diffusion bonding oxidant layer is transferred on the one side of Polarizer (film).
The measuring method > of < cohesive force
Light diffusion bonding oxidant layer is transferred to the one side of the Polarizer (film) of thickness 180 μm, thus obtains the light diffusion bonding film (blooming with adhesive layer) as sample.
Light diffusion bonding film is fitted on the non-tin face with the cleaned soda-lime glass of acetone with pressure roller, 50 DEG C, carry out pressure kettle process under the condition of 0.5MPa × 20 minute.Then, return to the environment of 23 DEG C × 50%RH, with tensile testing machine and according to JIS Z0237 " adhesive tape, bonding sheet test method ", measure the stripping strength of the light diffusion bonding film after 1 hour, by the cohesive force of stripping strength when peeling off using the speed of 300mm/min to 180 ° of directions as the light diffusion bonding oxidant layer of light diffusion bonding film.
The measuring method > of < specific refractory power
The specific refractory power of the light diffusion bonding oxidant layer at 23 DEG C is measured with Abbe refractometer (manufacturers: ERMA, model: ER-2S).
The measuring method > of < transmitance
The measuring method of transmittance: the transmitance measuring light diffusion bonding oxidant layer according to JIS K7105, " the optical characteristics test methods of plastics ".
The measuring method > of < haze value
The measuring method of haze value: the haze value measuring light diffusion bonding oxidant layer according to JIS K7136, " the mist degree method of calculation of plastics-transparent material ".
The test method > of < weather resistance
By adhesive film square for the 10cm adopting the method same with the mensuration of cohesive force to prepare, sample is prepared in the non-tin face being fitted in soda-lime glass, this sample is placed on the environment of 60 DEG C × 90%RH after lower 250 hours, be taken out to the environment of 23 DEG C × 50%RH, by the state of the light diffusion bonding film of visual observation after 1 hour, thus judge weather resistance.
Zero: the stripping and the foaming that do not produce light diffusion bonding film completely
△ a: part for light diffusion bonding film creates to be peeled off and foaming.
×: the entirety of light diffusion bonding film creates to be peeled off and foaming.
The measurement result of embodiment 1 ~ 5 and comparative example 1 ~ 3 is shown in Table 3.
Table 3
For the light diffusion bonding film of embodiment 1 ~ 5, be more than 2.0N/25mm when the thickness of light diffusion bonding oxidant layer is 20 μm to the cohesive force of sheet glass.In addition, the specific refractory power of light diffusion bonding oxidant layer be more than 1.47, transmitance be more than 90% and haze value be more than 40%, weather resistance is also excellent.That is, the light diffusion bonding film of embodiment 1 ~ 5 can meet necessary requirement and overcome problem.
As a reference, use the light diffusion bonding agent composition identical with embodiment 1 ~ 5 and prepare the light diffusion bonding film that light diffusion bonding oxidant layer thickness is respectively 10 μm, 13 μm, 15 μm, 20 μm in the same way, determine transmitance and the haze value of light diffusion bonding oxidant layer respectively, and the results are shown in table 4.For the transmitance of light diffusion bonding oxidant layer employing light diffusion bonding agent composition, although do not rely on the thickness of adhesive layer, known haze value reduces when the thickness of adhesive layer is thinning.
Table 4
| The thickness (μm) of adhesive layer | 20 | 15 | 13 | 10 |
| Haze value (%) | 85.77 | 80.75 | 78.26 | 72.99 |
| Transmitance (%) | 93.19 | 93.63 | 93.77 | 93.89 |
The adhesive film of comparative example 1, the set of monomers due to acrylic polymers becomes the cause of single 2EHA, and specific refractory power is low; Due to the cause of not siliceous class particle, haze value is low.And weather resistance is also poor.
The adhesive film of comparative example 2 may be that cohesive force is low, transmitance is low, weather resistance is also poor due to the content of silicon class particle many causes.
The adhesive film of comparative example 3, due to the poor cause of silicon class particle, haze value is low; Due to the cause that adhesive composition is cross-linked, binding property and weather resistance are also poor.
So, the adhesive film of comparative example 1 ~ 3 cannot meet proposed requirement and overcome Problems existing in the past in the past.
Claims (10)
1. a light diffusion bonding oxidant layer, it is the light diffusion bonding oxidant layer with light diffusion function,
Described smooth diffusion bonding oxidant layer is formed by the adhesive composition containing multipolymer and linking agent and silicon class particle,
Described multipolymer comprises: the carbonatoms of alkyl is more than at least one in (methyl) alkyl acrylate monomer of C1 ~ C14, and as containing can the monomer of functional group of copolymerization be selected from by more than at least one in the copolymerization monomer of hydroxyl, carboxylic copolymerization monomer, nitrogenous vinyl monomer and the group that forms containing aromatic monomer
The transmitance of described smooth diffusion bonding oxidant layer is more than 90%, and haze value is more than 40%, and specific refractory power is more than 1.47.
2. light diffusion bonding oxidant layer as claimed in claim 1, wherein, when the thickness of described smooth diffusion bonding oxidant layer is 20 μm, is more than 2.0N/25mm relative to the cohesive force of sheet glass.
3. light diffusion bonding oxidant layer as claimed in claim 1 or 2, wherein, in described adhesive composition, relative to the multipolymer of 100 weight parts, containing the isocyanate compound of 0.01 ~ 5 weight part as linking agent, the silicon class particle of 0.5 ~ 20 weight part,
Described multipolymer be by the carbonatoms of alkyl be more than at least one in (methyl) alkyl acrylate monomer of C1 ~ C14, with as containing the monomer of functional group of copolymerization can being selected from the copolymerization monomer of hydroxyl, carboxylic copolymerization monomer, nitrogenous vinyl monomer and containing the multipolymer that weight-average molecular weight that more than at least one in aromatic monomer formed is 20 ~ 2,500,000.
4. light diffusion bonding oxidant layer as claimed in claim 1 or 2, wherein, the haze value of described smooth diffusion bonding oxidant layer is more than 40% and less than 90%.
5. light diffusion bonding oxidant layer as claimed in claim 1 or 2, wherein, described silicon class particle be selected from the group that is made up of silicon dioxide granule, silicon-dioxide trimeric cyanamide core-shell particles, silicone particle more than one.
6. a light diffusion bonding film, the light diffusion bonding oxidant layer that its one side in mold release film is formed according to any one of Claims 1 to 5 forms, and has the formation of mold release film/light diffusion bonding oxidant layer/mold release film.
7. a light diffusion bonding film, its light diffusion bonding oxidant layer on the one side of base material according to any one of stacked Claims 1 to 5 forms.
8. a Polarizer peripheral components adhesive film, it uses smooth diffusion bonding film according to claim 7.
9. an adhesive film, its interlayer between Polarizer and brightness enhancement film employs the light diffusion bonding oxidant layer according to any one of Claims 1 to 5.
10., with a blooming for adhesive layer, it is stacked light diffusion bonding oxidant layer of having the right according to any one of requirement 1 ~ 5 at least one face of blooming.
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| JP2013226265A JP6343836B2 (en) | 2013-10-31 | 2013-10-31 | Light diffusion adhesive layer and light diffusion adhesive film |
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| KR101707841B1 (en) | 2017-02-17 |
| TW201516125A (en) | 2015-05-01 |
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| CN104592905B (en) | 2017-07-18 |
| KR20150050364A (en) | 2015-05-08 |
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| KR20160083827A (en) | 2016-07-12 |
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