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WO2011121817A1 - Film optique, plaque polarisante et dispositif d'affichage à cristaux liquides - Google Patents

Film optique, plaque polarisante et dispositif d'affichage à cristaux liquides Download PDF

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Publication number
WO2011121817A1
WO2011121817A1 PCT/JP2010/065390 JP2010065390W WO2011121817A1 WO 2011121817 A1 WO2011121817 A1 WO 2011121817A1 JP 2010065390 W JP2010065390 W JP 2010065390W WO 2011121817 A1 WO2011121817 A1 WO 2011121817A1
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Prior art keywords
optical film
resin
film
cellulose ester
mass
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PCT/JP2010/065390
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English (en)
Japanese (ja)
Inventor
瀧本　正高
笠原　健三
清水　啓
睦美 笠原
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Konica Minolta Opto Inc
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Konica Minolta Opto Inc
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L1/00—Compositions of cellulose, modified cellulose or cellulose derivatives
    • C08L1/08—Cellulose derivatives
    • C08L1/10—Esters of organic acids, i.e. acylates
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
    • C08L33/04—Homopolymers or copolymers of esters
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2301/00—Characterised by the use of cellulose, modified cellulose or cellulose derivatives
    • C08J2301/08—Cellulose derivatives
    • C08J2301/10—Esters of organic acids
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2333/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
    • C08J2333/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters
    • C08J2333/06—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters of esters containing only carbon, hydrogen, and oxygen, the oxygen atom being present only as part of the carboxyl radical
    • C08J2333/10—Homopolymers or copolymers of methacrylic acid esters
    • C08J2333/12—Homopolymers or copolymers of methyl methacrylate

Definitions

  • the present invention relates to an optical film, a polarizing plate, and a liquid crystal display device, and more particularly to an optical film, a polarizing plate, and a liquid crystal display device that do not deteriorate heat resistance over time.
  • a liquid crystal display device is composed of a liquid crystal cell in which a transparent electrode, a liquid crystal layer, a color filter, etc. are sandwiched between glass plates, and two polarizing plates provided on both sides thereof.
  • the optical element polarizing plate protective film
  • a child also referred to as a polarizing film or a polarizing film.
  • a cellulose triacetate film is usually used as this polarizing plate protective film.
  • Patent Documents 1, 2, and 3 A method for improving heat resistance and further improving brittleness of acrylic resin by mixing cellulose resin with acrylic resin has been proposed (Patent Documents 1, 2, and 3). However, the heat resistance after long-term use was still insufficient.
  • an object of the present invention is to provide an optical film that improves heat resistance over time.
  • the acrylic resin (A) is represented by the following general formula (1), and has a weight average molecular weight.
  • General formula (1) -(MMA) p- (X) q- (Y) r- MMA represents methyl methacrylate
  • X represents vinylpyrrolidone
  • Y represents a monomer unit copolymerizable with MMA and X.
  • the total substitution degree (T) of the acyl group of the cellulose ester resin (B) is 2.0 or more and 3.0 or less, and the substitution degree of the acyl group having 3 or more and 7 or less carbon atoms is 1.2 or more.
  • the said optical film contains 0.5 mass% or more and 30 mass% or less of acrylic particle (D) with respect to the gross mass of resin which comprises this optical film, Said 1 or 2 characterized by the above-mentioned.
  • Optical film contains 0.5 mass% or more and 30 mass% or less of acrylic particle (D) with respect to the gross mass of resin which comprises this optical film, Said 1 or 2 characterized by the above-mentioned.
  • a polarizing plate comprising the optical film described in any one of 1 to 3 above.
  • a liquid crystal display device comprising the optical film described in any one of 1 to 3 above.
  • an optical film that improves heat resistance over time can be provided, whereby a polarizing plate and a liquid crystal display device using the optical film can be provided.
  • the optical film of the present invention is an optical film containing an acrylic resin (A) and a cellulose ester resin (B) in a mass ratio of 95: 5 to 50:50, and the acrylic resin (A) is represented by the following general formula ( 1), wherein the weight average molecular weight Mw is 20,000 or more and 1,000,000 or less.
  • General formula (1) -(MMA) p- (X) q- (Y) r- MMA represents methyl methacrylate, X represents vinylpyrrolidone, Y represents a monomer unit copolymerizable with MMA and X.
  • the acrylic resin used in the present invention includes a methacrylic resin.
  • the acrylic resin (A) of the present invention is represented by the following general formula (1), and has a weight average molecular weight Mw of 20,000 to 1,000,000.
  • General formula (1) -(MMA) p- (X) q- (Y) r- MMA represents methyl methacrylate
  • X represents vinylpyrrolidone
  • Y represents a monomer unit copolymerizable with MMA and X.
  • Q is 1 ⁇ q ⁇ 50, preferably 5 ⁇ q ⁇ 30.
  • the monomer X contributes to the improvement of heat resistance because the functional group has an electron loan pair and coordinates the water molecule, thereby causing the retardation of the optical film generated over time. It is speculated that the crystal orientation of a certain resin may be suppressed.
  • the functional group is non-dissociable, it is considered that it is physically stable without acid generation due to decomposition over time.
  • the weight average molecular weight is large, the self-supporting property as an optical film is also satisfied.
  • Y in the acrylic resin (A) of the present invention represents a monomer unit copolymerizable with MMA and X.
  • Examples of Y include monomers described in Patent Documents 1, 2, and 3, such as acrylic monomers other than MMA, methacrylic monomers, olefins, acrylonitrile, styrene, vinyl acetate, and amide group-containing monomers. Y may be two or more.
  • Y can be used as needed and is most preferably not used.
  • the acrylic resin (A) of the present invention has a weight average molecular weight (Mw) of 20000 or more from the viewpoint of improving transparency particularly when it is compatible with the cellulose ester resin (B).
  • the weight average molecular weight (Mw) of the acrylic resin (A) is more preferably in the range of 20,000 to 1,000,000, particularly preferably in the range of 50,000 to 600,000, and most preferably in the range of 100,000 to 400,000. preferable.
  • the upper limit value of the weight average molecular weight (Mw) of the acrylic resin (A) is preferably 1000000 or less from the viewpoint of production.
  • the weight average molecular weight of the acrylic resin of the present invention can be measured by gel permeation chromatography.
  • the measurement conditions are as follows.
  • any known method such as suspension polymerization, emulsion polymerization, bulk polymerization, or solution polymerization may be used.
  • a polymerization initiator a normal peroxide type and an azo type can be used, and a redox type can also be used.
  • the polymerization temperature may be 30 to 100 ° C. for suspension or emulsion polymerization, and 80 to 160 ° C. for bulk or solution polymerization.
  • polymerization can be carried out using alkyl mercaptan or the like as a chain transfer agent.
  • ⁇ Cellulose ester resin (B)> The cellulose ester resin (B) of the present invention has a total acyl group substitution degree (T) of 2.0 to 3.3 from the viewpoint of transparency particularly when it is improved in brittleness and is compatible with the acrylic resin (A).
  • the substitution degree of the acyl group having 0 and 3 to 7 carbon atoms is preferably 1.2 to 3.0, and the substitution degree of the acyl group having 3 to 7 carbon atoms is preferably 2.0 to 3.0. .
  • the cellulose ester resin of the present invention is a cellulose ester resin substituted with an acyl group having 3 to 7 carbon atoms.
  • an acyl group having 3 to 7 carbon atoms Specifically, propionyl (pr), butyryl (bt) and the like are preferably used, A propionyl group is preferably used.
  • the acrylic ester When the total substitution degree of the acyl group of the cellulose ester resin (B) is less than 2.0, that is, when the residual degree of the hydroxyl groups at the 2, 3, and 6 positions of the cellulose ester molecule is more than 1.0, the acrylic ester When the resin (A) is not sufficiently compatible with the resin (A) and used as an optical film, haze becomes a problem.
  • the substitution degree of the acyl group having 2 carbon atoms that is, the acetyl group (ac) is high, and the substitution degree of the acyl group having 3 to 7 carbon atoms. Is less than 1.2, the compatibility is lowered and the haze is increased.
  • the total substitution degree (T) is 2.0 to 3.0, and the substitution degree of the acyl group having 3 to 7 carbon atoms is 1.2 to 3. If it is 0.0, there is no problem, but the total degree of substitution of acyl groups other than those having 3 to 7 carbon atoms, that is, acetyl groups or acyl groups having 8 or more carbon atoms, is preferably 1.3 or less.
  • the total substitution degree (T) of the acyl group of the cellulose ester resin (B) is more preferably in the range of 2.5 to 3.0.
  • the cellulose ester resin (B) of the present invention is preferably at least one selected from cellulose acetate propionate, cellulose acetate butyrate, cellulose acetate benzoate, cellulose propionate, and cellulose butyrate, that is, carbon Those having an acyl group having 3 or 4 atoms as a substituent are preferred.
  • particularly preferable cellulose ester resins are cellulose acetate propionate and cellulose propionate.
  • the portion not substituted with an acyl group usually exists as a hydroxyl group. These can be synthesized by known methods.
  • substitution degree of the acetyl group and the substitution degree of other acyl groups were determined by the method prescribed in ASTM-D817-96.
  • the weight average molecular weight (Mw) of the cellulose ester resin of the present invention is 75,000 or more, particularly from the viewpoint of improving compatibility with the acrylic resin (A) and brittleness, and is preferably in the range of 75,000 to 300,000. More preferably, it is within the range of 240000, particularly preferably from 160000 to 240000.
  • the weight average molecular weight (Mw) of the cellulose ester resin is less than 75,000, the effect of improving heat resistance and brittleness decreases. Moreover, when it exceeds 300,000, a viscosity becomes high and film formation becomes difficult.
  • two or more kinds of cellulose resins can be mixed and used.
  • the weight average molecular weight of the cellulose ester resin of the present invention can be measured by the GPC.
  • ⁇ Acrylic resin (A) and cellulose ester resin (B)> In the optical film of the present invention, the acrylic resin (A) and the cellulose ester resin (B) are preferably contained in a compatible state at a mass ratio of 95: 5 to 50:50, preferably 70:30. ⁇ 60: 40.
  • the mass ratio of the acrylic resin (A) and the cellulose ester resin (B) is more than 95: 5, the effect of the cellulose ester resin (B) cannot be sufficiently obtained, and the mass ratio is When the amount of acrylic resin is less than 50:50, the photoelastic coefficient is increased.
  • the acrylic resin (A) and the cellulose ester resin (B) are preferably contained in a compatible state.
  • the physical properties and quality required for an optical film are achieved by supplementing each other by dissolving different resins.
  • Whether the acrylic resin (A) and the cellulose ester resin (B) are in a compatible state can be determined by, for example, the glass transition temperature Tg.
  • the two resins have different glass transition temperatures
  • there are two or more glass transition temperatures for each resin because there is a glass transition temperature for each resin.
  • the glass transition temperature specific to each resin disappears and becomes one glass transition temperature, which is the glass transition temperature of the compatible resin.
  • the glass transition temperature referred to here is an intermediate value determined according to JIS K7121 (1987) using a differential scanning calorimeter (DSC-7 model manufactured by Perkin Elmer) at a heating rate of 20 ° C./min.
  • the point glass transition temperature (Tmg) is an intermediate value determined according to JIS K7121 (1987) using a differential scanning calorimeter (DSC-7 model manufactured by Perkin Elmer) at a heating rate of 20 ° C./min.
  • the point glass transition temperature (Tmg) The point glass transition temperature (Tmg).
  • the weight average molecular weight (Mw) of the acrylic resin (A), the weight average molecular weight (Mw) of the cellulose ester resin (B), and the degree of substitution are different in solubility in the solvent of both resins. It is obtained by measuring each after use.
  • the resin may be separated by combining two or more of these solvent combinations.
  • the dissolved resin and the resin remaining as an insoluble matter are filtered off, and the solution containing the extract can be separated by an operation of evaporating the solvent and drying.
  • fractionated resins can be identified by general structural analysis of polymers.
  • the optical film of the present invention contains a resin other than the acrylic resin (A) and the cellulose ester resin (B), it can be separated by the same method.
  • the weight average molecular weights (Mw) of the compatible resins are different, the high molecular weight substances are eluted earlier by gel permeation chromatography (GPC), and the lower molecular weight substances are eluted after a longer time. Therefore, it can be easily fractionated and the molecular weight can be measured.
  • GPC gel permeation chromatography
  • the molecular weight of the compatible resin is measured by GPC, and at the same time, the resin solution eluted every time is separated, the solvent is distilled off, and the dried resin is different by quantitatively analyzing the structure. By detecting the resin composition for each molecular weight fraction, it is possible to identify each compatible resin.
  • the total mass of the acrylic resin (A) and the cellulose ester resin (B) in the optical film of the present invention is preferably 55% by mass or more of the optical film, more preferably 60% by mass or more, and particularly preferably 70% by mass or more.
  • ⁇ Other additive resins> When the resin other than the acrylic resin (A) and the cellulose ester resin (B) is used for the optical film of the present invention, it is preferable to adjust the addition amount within a range that does not impair the function of the optical film of the present invention.
  • a preferred resin is a low molecular acrylic resin obtained by polymerizing an ethylenically unsaturated monomer described in paragraphs (0072) to (0123) of JP 2010-32655 A (weight average molecular weight Mw is 500 or more and 30000 or less). Polymer).
  • Mw is 2000 to 30000. If it is 1000 or less, a problem occurs in bleed-out, and if it exceeds 30000, the transparency deteriorates.
  • the low molecular acrylic resin of the present invention and the vinyl polymer having an amide bond are 0 to 15% by mass, preferably 0 to 10% by mass, based on the total mass of the optical film.
  • the optical film of the present invention may contain acrylic particles (D) described in Patent Document 1.
  • Examples of such a commercial product of a multilayer structure acrylic granular composite include, for example, “Metablene W-341” manufactured by Mitsubishi Rayon Co., “Kaneace” manufactured by Kaneka Chemical Co., Ltd., “Paraloid” manufactured by Kureha Chemical Co., Ltd. Examples include “Acryloid” manufactured by Rohm and Haas, “Staffroid” manufactured by Gantz Kasei Kogyo, Chemisnow MR-2G, MS-300X (manufactured by Soken Chemical Co., Ltd.), and "Parapet SA” manufactured by Kuraray. These can be used alone or in combination of two or more.
  • the optical film of the present invention preferably contains 0 to 30% by mass of acrylic particles (D) with respect to the total mass of the resin constituting the film, and is contained in the range of 1.0 to 15% by mass. More preferably.
  • the optical film of the present invention includes a retardation control agent for controlling retardation, a plasticizer for imparting processability to the film, an antioxidant for preventing deterioration of the film, and an ultraviolet ray for imparting an ultraviolet absorbing function. It is preferable to contain additives such as fine particles (matting agent) that impart slipperiness to the absorbent and film.
  • polyester polyol of glycol and dibasic acid examples include a dehydration condensation reaction between a glycol having an average carbon number of 2 to 3.5 and a dibasic acid having an average carbon number of 4 to 5.5, or the glycol. It is preferably one produced by a conventional method by addition of a dibasic anhydride having an average carbon number of 4 to 5.5 and a dehydration condensation reaction.
  • an aromatic terminal polyester represented by the following general formula (I) can be used as the retardation control agent of the present invention.
  • B is a benzene monocarboxylic acid residue
  • G is an alkylene glycol residue having 2 to 12 carbon atoms, an aryl glycol residue having 6 to 12 carbon atoms, or an oxyalkylene glycol residue having 4 to 12 carbon atoms
  • A represents an alkylene dicarboxylic acid residue having 4 to 12 carbon atoms or an aryl dicarboxylic acid residue having 6 to 12 carbon atoms
  • n represents an integer of 1 or more.
  • aromatic terminal polyester of the present invention include paragraphs (0183) to (0186) of JP-A 2010-32655.
  • the content of the aromatic terminal polyester of the present invention is preferably 0 to 20% by mass, more preferably 1 to 11% by mass in the optical film.
  • the optical film of the present invention can contain a polyhydric alcohol ester compound.
  • Examples of the polyhydric alcohol ester compound include paragraphs (0218) to (0170) of JP-A 2010-32655.
  • sugar ester compound of the present invention it is possible to use a sugar ester compound having at least one pyranose structure or at least one furanose structure and esterifying all or part of the OH groups of the structure. preferable.
  • sugar ester compound used in the present invention examples include glucose, galactose, mannose, fructose, xylose, arabinose, lactose, sucrose, cellobiose, cellotriose, maltotriose, raffinose, etc. What has is preferable.
  • An example is sucrose.
  • the sugar ester compound used in the present invention is one in which part or all of the hydroxyl groups of the sugar compound are esterified or a mixture thereof.
  • sugar ester compound of the present invention include paragraphs (0060) to (0070) of JP-A 2010-32655.
  • a plasticizer In the optical film of the present invention, a plasticizer, a retardation control agent, an antioxidant, an ultraviolet absorber, matte particles, and the like can be used in combination.
  • plasticizer examples include phthalate ester, fatty acid ester, trimellitic ester, phosphate ester, polyester, and epoxy.
  • phosphate plasticizers triphenyl phosphate, tricresyl phosphate, cresyl diphenyl phosphate, octyl diphenyl phosphate, diphenylbiphenyl phosphate, trioctyl phosphate, tributyl phosphate, etc.
  • phthalate ester plasticizers diethyl phthalate, dimethoxy Ethyl phthalate, dimethyl phthalate, dioctyl phthalate, dibutyl phthalate, di-2-ethylhexyl phthalate and the like can be used.
  • polyester-based and phthalate-based plasticizers are preferably used.
  • Polyester plasticizers are superior in non-migration and extraction resistance compared to phthalate ester plasticizers such as dioctyl phthalate, but are slightly inferior in plasticizing effect and compatibility.
  • the polyester plasticizer is a reaction product of a monovalent or tetravalent carboxylic acid and a monovalent or hexavalent alcohol, and is mainly obtained by reacting a divalent carboxylic acid with a glycol.
  • Representative divalent carboxylic acids include glutaric acid, itaconic acid, adipic acid, phthalic acid, azelaic acid, sebacic acid and the like.
  • glycol examples include glycols such as ethylene, propylene, 1,3-butylene, 1,4-butylene, 1,6-hexamethylene, neopentylene, diethylene, triethylene, and dipropylene. These divalent carboxylic acids and glycols may be used alone or in combination.
  • the ester plasticizer may be any of ester, oligoester and polyester types, and the molecular weight is preferably in the range of 100 to 10000, but preferably in the range of 600 to 3000, the plasticizing effect is large.
  • the viscosity of the plasticizer has a correlation with the molecular structure and molecular weight, but in the case of an adipic acid plasticizer, the range of 200 to 5000 mPa ⁇ s (25 ° C.) is preferable because of compatibility and plasticization efficiency. Furthermore, some polyester plasticizers may be used in combination.
  • the plasticizer is preferably added in an amount of 0.5 to 30 parts by mass with respect to 100 parts by mass of the composition containing an acrylic resin. If the added amount of the plasticizer exceeds 30 parts by mass, the surface becomes sticky, which is not preferable for practical use.
  • These plasticizers may be used alone or in combination of two or more.
  • ⁇ Other phase difference control agents> Other than the above retardation control agent of the present invention, those containing bisphenol A in the molecule are preferred. A compound in which ethylene oxide or propylene oxide is added to both ends of bisphenol A can be used.
  • BP series such as New Paul BP-2P, BP-3P, BP-23P, BP-5P, BPE-20 (F), BPE-20NK, BPE-20T, BPE-40, BPE-60, BPE-100
  • BPE series manufactured by Sanyo Chemical Co., Ltd.
  • BPX series manufactured by Adeka Co., Ltd.
  • Adeka Polyether BPX-11, BPX-33, BPX-55 Adeka Polyether BPX-11, BPX-33, BPX-55.
  • Diallyl bisphenol A dimethallyl bisphenol A, tetrabromobisphenol A in which bisphenol A is substituted with bromine, oligomers and polymers obtained by polymerizing this, bisphenol A bis (diphenyl phosphate) substituted with diphenyl phosphate, etc. Can be used.
  • Polycarbonate obtained by polymerizing bisphenol A polyarylate obtained by polymerizing bisphenol A with a dibasic acid such as terephthalic acid, and an epoxy oligomer or polymer polymerized with an epoxy-containing monomer can also be used.
  • Modiper CL130D or L440-G obtained by graft polymerization of bisphenol A and styrene or styrene acrylic can also be used.
  • Antioxidant> in this invention, what is generally known can be used as an antioxidant.
  • lactone, sulfur, phenol, double bond, hindered amine, and phosphorus compounds can be preferably used.
  • the phenolic compound preferably has a 2,6-dialkylphenol structure.
  • BASF Japan Ltd. “Irganox 1076”, “Irganox 1010”, and ADEKA “ADEKA STAB AO-50” are trade names. What is marketed is preferable.
  • the above phosphorus compounds are, for example, from Sumitomo Chemical Co., Ltd., “Sumilizer GP”, ADEKA Co., Ltd., “ADK STAB PEP-24G”, “ADK STAB PEP-36” and “ADK STAB 3010”, “BASF Japan Co., Ltd.” IRGAFOS P-EPQ ", commercially available from Sakai Chemical Industry Co., Ltd. under the trade name" GSY-P101 "is preferred.
  • the hindered amine compound is preferably commercially available from BASF Japan KK under the trade names of “Tinuvin 144” and “Tinvin 770”, and from ADEKA Corporation as “ADK STAB LA-52”.
  • the above sulfur compounds are preferably those commercially available from Sumitomo Chemical Co., Ltd. under the trade names “Sumilizer TPL-R” and “Sumilizer TP-D”.
  • the above-mentioned double bond compound is preferably commercially available from Sumitomo Chemical Co., Ltd. under the trade names of “Sumilizer GM” and “Sumilizer GS”.
  • the amount of these antioxidants and the like to be added is appropriately determined in accordance with the process for recycling and use, but generally 0.05 to 20% by mass, preferably with respect to the resin as the main raw material of the film Is added in the range of 0.1 to 1% by mass.
  • antioxidants can obtain a synergistic effect by using several different types of compounds in combination rather than using only one kind.
  • the combined use of lactone, phosphorus, phenol and double bond compounds is preferred.
  • a colorant means a dye or a pigment.
  • the colorant refers to a colorant having an effect of making the color tone of a liquid crystal screen a blue tone, adjusting a yellow index, and reducing haze.
  • dyes and pigments can be used as the colorant, but anthraquinone dyes, azo dyes, phthalocyanine pigments and the like are effective.
  • UV absorber used in the present invention is not particularly limited, for example, oxybenzophenone compounds, benzotriazole compounds, salicylic acid ester compounds, benzophenone compounds, cyanoacrylate compounds, triazine compounds, nickel complex compounds, inorganic powders Examples include the body. It is good also as a polymer type ultraviolet absorber.
  • ⁇ Matting agent> it is preferable to add a matting agent in order to impart film slipperiness.
  • the matting agent used in the present invention may be either an inorganic compound or an organic compound as long as it does not impair the transparency of the obtained film and has heat resistance during melting. These matting agents can be used alone or in combination of two or more.
  • High transparency and slipperiness can be achieved at the same time by using particles having different particle sizes and shapes (for example, needle shape and spherical shape).
  • silicon dioxide is particularly preferably used since it has a refractive index close to that of cellulose ester and is excellent in transparency (haze).
  • silicon dioxide examples include Aerosil 200V, Aerosil R972V, Aerosil R972, R974, R812, 200, 300, R202, OX50, TT600, NAX50 (manufactured by Nippon Aerosil Co., Ltd.), Sea Hoster KEP-10, Sea Hoster KEP- 30, Seahoster KEP-50 (above, manufactured by Nippon Shokubai Co., Ltd.), Silo Hovic 100 (manufactured by Fuji Silysia), Nip Seal E220A (manufactured by Nippon Silica Kogyo), Admafine SO (manufactured by Admatechs), etc. Goods etc. can be preferably used.
  • the shape of the particles can be used without particular limitation, such as indefinite shape, needle shape, flat shape, spherical shape, etc. However, the use of spherical particles is preferable because the transparency of the resulting film can be improved.
  • the particle size is preferably smaller than the wavelength of visible light, and more preferably 1 ⁇ 2 or less of the wavelength of visible light. . If the size of the particles is too small, the slipperiness may not be improved, so the range of 80 nm to 180 nm is particularly preferable.
  • the particle size means the size of the aggregate when the particle is an aggregate of primary particles. Moreover, when a particle is not spherical, it means the diameter of a circle corresponding to the projected area.
  • a hydrogen bonding solvent can be added for the purpose of reducing the melt viscosity.
  • Hydrogen-bonding solvent refers to J.I. N. As described in Israel Ativili, “Intermolecular Forces and Surface Forces” (Takeshi Kondo, Hiroyuki Oshima, Maglow Hill Publishing, 1991) and electrically negative atoms (oxygen, nitrogen, fluorine, chlorine)
  • the glass transition temperature of the cellulose resin used alone is higher than that.
  • the melting temperature of the cellulose resin composition can be lowered by the addition of a hydrogen bonding solvent, or the melt viscosity of the cellulose resin composition containing a hydrogen bonding solvent can be lowered at the same melting temperature as the cellulose resin. . (Physical properties of optical film)
  • the characteristics of the optical film according to the present invention will be described.
  • haze value As an index for judging the transparency of the optical film in the present invention, haze value (turbidity) is used.
  • the haze value is required to be 1.0% or less, and 0.5% or less. More preferably.
  • the total light transmittance is preferably 90% or more, and more preferably 93% or more. Moreover, as a realistic upper limit, it is about 99%.
  • the optical film of the present invention containing the acrylic resin (A) and the cellulose ester resin (B), high transparency can be obtained, but when using acrylic particles for the purpose of improving another physical property, By reducing the difference in refractive index between the resin (acrylic resin (A) and cellulose ester resin (B)) and acrylic particles (D), an increase in haze value can be prevented.
  • the optical film of the present invention preferably has a defect with a diameter of 5 ⁇ m or more in the film plane of 1 piece / 10 cm square or less. More preferably, it is 0.5 piece / 10 cm square or less, more preferably 0.1 piece / 10 cm square or less.
  • the diameter of the defect indicates the diameter when the defect is circular, and when it is not circular, the range of the defect is determined by observing with a microscope according to the following method, and the maximum diameter (diameter of circumscribed circle) is determined.
  • the range of the defect is the size of the shadow when the defect is observed with the transmitted light of the differential interference microscope when the defect is a bubble or a foreign object. If the defect is a change in surface shape, such as transfer of a roll flaw or an abrasion, the size is confirmed by observing the defect with the reflected light of a differential interference microscope.
  • the film When the number of defects is more than 1/10 cm square, for example, when a tension is applied to the film during processing in a later process, the film may be broken with the defect as a starting point and productivity may be reduced. Moreover, when the diameter of a defect becomes 5 micrometers or more, it can confirm visually by polarizing plate observation etc., and when used as an optical member, a bright spot may arise.
  • ⁇ Retardation> For the retardation, a 35 mm ⁇ 35 mm sample was cut from the produced optical film, conditioned for 2 hours at 25 ° C. and 55% RH, and measured from the vertical direction at 590 nm with an automatic birefringence meter (KOBRA WR, Oji Scientific Instruments). Ro and Rt at each wavelength were calculated from the measured values and the extrapolated values of the retardation values measured in the same manner while tilting the film surface.
  • KOBRA WR automatic birefringence meter
  • the optical film of the present invention has an in-plane retardation value Ro (590) defined by the following formula (I) in the range of 0 to 100 nm, and a retarder in the thickness direction defined by the following formula (II). It is preferable to adjust so that the foundation value Rt (590) is in the range of ⁇ 100 to 100 nm.
  • Ro (590) (nx ⁇ ny) ⁇ d (nm)
  • Rt (590) ⁇ (nx + ny) / 2 ⁇ nz ⁇ ⁇ d (nm)
  • Ro (590) represents the in-plane retardation value in the film at a measurement wavelength of 590 nm
  • Rt (590) represents the retardation value in the thickness direction in the film at 590 nm.
  • D represents the thickness (nm) of the optical film
  • nx represents the maximum refractive index in the plane of the film at 590 nm, and is also referred to as the refractive index in the slow axis direction.
  • ny represents the refractive index in the direction perpendicular to the slow axis in the film plane at 590 nm, and
  • nz represents the refractive index of the film in the thickness direction at 590 nm.
  • the in-plane retardation value Ro (590) is preferably in the range of 0 to 250 nm.
  • the retardation value Rt (590) in the thickness direction is preferably in the range of ⁇ 50 to 50 nm.
  • the composition of the acrylic resin and the cellulose ester resin is adjusted within a mass ratio of 95: 5 to 50:50, and the ratio of each resin is adjusted. This is done by adjusting the amount to be added.
  • the retardation value can be set to a desired value.
  • the viewing angle of the liquid crystal display device using the film of the present invention can be widened and the front contrast can be improved.
  • Front contrast (brightness of white display measured from normal direction of display device) / (brightness of black display measured from normal direction of display device)
  • the viewing angle is an angle at which a certain level of contrast can be maintained when the viewing direction of the liquid crystal display device is tilted from the normal direction.
  • Uniformity in the slow axis direction is also important, and the angle is preferably ⁇ 5 to + 5 ° with respect to the film width direction, more preferably in the range of ⁇ 1 to + 1 °, particularly ⁇ 0.
  • a range of 5 to + 0.5 ° is preferable, and a range of ⁇ 0.1 to + 0.1 ° is particularly preferable.
  • the height from the top of the adjacent mountain to the bottom of the valley is 300 nm or more, and there is no streak continuous in the longitudinal direction with an inclination of 300 nm / mm or more.
  • the shape of the streaks was measured using a surface roughness meter. Specifically, using a SV-3100S4 manufactured by Mitutoyo, a stylus (diamond needle) with a tip shape of 60 ° cone and a tip curvature radius of 2 ⁇ m was used. The film is scanned in the width direction of the film at a measurement speed of 1.0 mm / sec while applying a load of 0.75 mN, and a cross-sectional curve is measured with a Z-axis (thickness direction) resolution of 0.001 ⁇ m.
  • the height of the streak reads the vertical distance (H) from the top of the mountain to the bottom of the valley.
  • the slope of the streak is obtained by reading the horizontal distance (L) from the top of the mountain to the bottom of the valley and dividing the vertical distance (H) by the horizontal distance (L).
  • the thickness of the optical film of the present invention is preferably 20 ⁇ m or more and 150 ⁇ m or less. More preferably, it is 30 ⁇ m or more and 80 ⁇ m or less.
  • the optical film of the present invention can be particularly preferably used as a polarizing plate protective film for a large-sized liquid crystal display device or a liquid crystal display device for outdoor use as long as the above physical properties are satisfied.
  • the optical film of the present invention is preferably produced by a melt casting coextrusion film forming method from the viewpoint of flatness and thinning.
  • the method for producing an optical film of the present invention is a method for producing an optical film in which at least an acrylic resin (A) and a cellulose ester resin (B) are melted and coextruded from a die and cast on a cooling roll.
  • the mixture of acrylic resin (A), cellulose ester (including cellulose ester resin (B)), plasticizer and other additives used for melt extrusion is usually preferably kneaded in advance and pelletized.
  • Pelletization may be performed by a known method. For example, dry acrylic resin (A), dry cellulose ester, plasticizer, and other additives are fed to an extruder with a feeder and kneaded using a single or twin screw extruder. Then, it can be extruded from a die into a strand, cooled with water or air, and cut.
  • dry acrylic resin (A) dry cellulose ester, plasticizer, and other additives are fed to an extruder with a feeder and kneaded using a single or twin screw extruder. Then, it can be extruded from a die into a strand, cooled with water or air, and cut.
  • cellulose ester easily absorbs moisture, it is preferable to dry it at 70 to 140 ° C. for 3 hours or more with a dehumidifying hot air dryer or a vacuum dryer so that the moisture content is 200 ppm or less, and further 100 ppm or less.
  • Additives may be fed into the extruder and fed into the extruder, or may be fed through individual feeders.
  • a small amount of an additive such as an antioxidant is preferably mixed in advance in order to mix uniformly.
  • Mixing of the antioxidants may be performed by mixing solids, and if necessary, the antioxidant may be dissolved in a solvent and mixed by impregnating the acrylic resin (A) and cellulose ester, or You may spray and mix.
  • a vacuum nauter mixer is preferable because it can dry and mix simultaneously. Moreover, when touching with air, such as an exit from a feeder part or die
  • the extruder is preferably processed at as low a temperature as possible so as to be able to be pelletized so that the shear force is suppressed and the resin does not deteriorate (molecular weight reduction, coloring, gel formation, etc.).
  • a twin screw extruder it is preferable to rotate in the same direction using a deep groove type screw. From the uniformity of kneading, the meshing type is preferable.
  • Film formation is performed using the pellets obtained as described above. It is also possible to feed the raw material powder directly to the extruder with a feeder and form a film as it is without pelletization.
  • a line for introducing the acrylic resin (A) from the molten mixture to the casting die and a line for introducing the cellulose tellur resin from the molten mixture to the casting die are provided side by side, and each molten mixture is laminated in the casting die. .
  • the pellets produced are extruded using a single-screw or twin-screw type extruder, the melting temperature Tm when being extruded is about 200 to 300 ° C., filtered through a leaf disk type filter or the like to remove foreign matters, and then the T-die The film is coextruded into a film, solidified on a cooling roll, and cast while pressing with an elastic touch roll.
  • Tm is the temperature of the die exit portion of the extruder.
  • defects are also referred to as die lines, but in order to reduce surface defects such as die lines, it is preferable to have a structure in which the resin retention portion is minimized in the piping from the extruder to the die. . It is preferable to use a die that has as few scratches as possible inside the lip.
  • the inner surface that comes into contact with the molten resin is preferably subjected to surface treatment that makes it difficult for the molten resin to adhere to the surface by reducing the surface roughness or using a material with low surface energy.
  • a hard chrome plated or ceramic sprayed material is polished so that the surface roughness is 0.2 S or less.
  • the cooling roll of the present invention is not particularly limited, but is a roll having a structure in which a heat medium or a coolant that can be controlled in temperature flows with a highly rigid metal roll, and the size is not limited. It is sufficient that the film is large enough to cool the film, and the diameter of the cooling roll is usually about 100 mm to 1 m.
  • the surface material of the cooling roll includes carbon steel, stainless steel, aluminum, titanium and the like. Further, in order to increase the surface hardness or improve the releasability from the resin, it is preferable to perform a surface treatment such as hard chrome plating, nickel plating, amorphous chrome plating, or ceramic spraying.
  • the surface roughness of the cooling roll surface is preferably 0.1 ⁇ m or less in terms of Ra, and more preferably 0.05 ⁇ m or less.
  • the smoother the roll surface the smoother the surface of the resulting film.
  • the surface processed is further polished to have the above-described surface roughness.
  • Examples of the elastic touch roll of the present invention include JP-A-03-124425, JP-A-08-224772, JP-A-07-1000096, JP-A-10-272676, WO97-028950, JP-A-11-235747, JP-A-11-235747.
  • a thin-film metal sleeve-covered silicon rubber roll can be used.
  • the film obtained as described above is further stretched 1.01 to 3.0 times in at least one direction after passing through the step of contacting the cooling roll.
  • the sharpness of the streaks becomes gentle by stretching and can be highly corrected.
  • the film is stretched 1.1 to 2.0 times in both the longitudinal (film transport direction) and lateral (width direction) directions.
  • the stretching method a known roll stretching machine or tenter can be preferably used.
  • the optical film is a retardation film that also serves as a polarizing plate protective film
  • the slow axis of the optical film becomes the width direction by stretching in the width direction.
  • the draw ratio is 1.1 to 3.0 times, preferably 1.2 to 1.5 times
  • the draw temperature is usually Tg to Tg + 50 ° C. of the resin constituting the film, preferably Tg to Tg + 40 ° C. Performed in the temperature range.
  • the stretching is preferably performed under a uniform temperature distribution controlled in the width direction.
  • the temperature is preferably within ⁇ 2 ° C, more preferably within ⁇ 1 ° C, and particularly preferably within ⁇ 0.5 ° C.
  • the film may be contracted in the longitudinal direction or the width direction for the purpose of reducing the retardation of the optical film produced by the above method and reducing the dimensional change rate.
  • the amount of the solvent contained is 0.01% by mass or less when wound up as a roll film.
  • the amount of the solvent can be measured by the following method.
  • the return material is a product obtained by finely pulverizing the optical film, which is generated when the optical film is formed, and is obtained by cutting off both sides of the film, or by using an optical film original that has been speculated out due to scratches, etc. .
  • an acrylic resin, a cellulose ester resin, and in some cases, acrylic particles kneaded into pellets can be preferably used.
  • the optical film of the present invention is preferably a long film. Specifically, the optical film has a thickness of about 100 m to 5000 m, and is usually in the form of a roll.
  • the width of the long film is preferably 1.3 to 4 m, more preferably 1.4 to 2 m.
  • the film thickness of the optical film of the present invention is not particularly limited, but when used for a polarizing plate protective film described later, it is preferably 20 to 200 ⁇ m, more preferably 25 to 100 ⁇ m, and 30 to 80 ⁇ m. It is particularly preferred.
  • a polarizing plate can be produced by a general method.
  • an adhesive layer is provided on the back side of the optical film of the present invention, and is bonded to at least one surface of a polarizer produced by immersion and stretching in an iodine solution.
  • the optical film of the present invention may be used, or another polarizing plate protective film may be used.
  • a commercially available cellulose ester film for example, Konica Minoltack KC8UX, KC4UX, KC5UX, KC8UY, KC4UY, KC12UR, KC8UCR-3, KC8UCR-4, KC8UCR-5, KC8UE, KC4FR-4, KC4FR-3, KC4FR-3, KC4FR-4 -1, KC8UY-HA, KC8UX-RHA, manufactured by Konica Minolta Opto Co., Ltd.) and the like are preferably used.
  • a polarizer which is a main component of a polarizing plate, is an element that allows only light of a plane of polarization in a certain direction to pass.
  • a typical polarizer currently known is a polyvinyl alcohol-based polarizing film, which is polyvinyl alcohol.
  • iodine is dyed on a system film and one in which dichroic dye is dyed.
  • the polarizer is formed by forming a polyvinyl alcohol aqueous solution into a film and dyeing the film by uniaxial stretching or dyeing or uniaxially stretching, and then performing a durability treatment with a boron compound.
  • a pressure-sensitive adhesive having a storage elastic modulus at 25 ° C. in the range of 1.0 ⁇ 10 4 Pa to 1.0 ⁇ 10 9 Pa in at least a part of the pressure-sensitive adhesive layer is used. It is preferable to use a curable pressure-sensitive adhesive that forms a high molecular weight body or a crosslinked structure by various chemical reactions after the pressure-sensitive adhesive is applied and bonded.
  • urethane adhesives examples include, for example, urethane adhesives, epoxy adhesives, aqueous polymer-isocyanate adhesives, curable adhesives such as thermosetting acrylic adhesives, moisture-curing urethane adhesives, polyether methacrylate types
  • curable adhesives such as thermosetting acrylic adhesives, moisture-curing urethane adhesives, polyether methacrylate types
  • anaerobic pressure-sensitive adhesives such as ester-based methacrylate type and oxidized polyether methacrylate, cyanoacrylate-based instantaneous pressure-sensitive adhesives, and acrylate-peroxide-based two-component instantaneous pressure-sensitive adhesives.
  • the above-mentioned pressure-sensitive adhesive may be a one-component type or a type in which two or more components are mixed before use.
  • the pressure-sensitive adhesive may be a solvent system using an organic solvent as a medium, or an aqueous system such as an emulsion type, a colloidal dispersion type, or an aqueous solution type that is a medium containing water as a main component. It may be a solvent type.
  • the concentration of the pressure-sensitive adhesive liquid may be appropriately determined depending on the film thickness after adhesion, the coating method, the coating conditions, and the like, and is usually 0.1 to 50% by mass.
  • ⁇ Liquid crystal display device> By incorporating the polarizing plate bonded with the optical film of the present invention into a liquid crystal display device, it is possible to produce various liquid crystal display devices with excellent visibility, but particularly outdoors such as large liquid crystal display devices and digital signage. It is preferably used for a liquid crystal display device for use.
  • the polarizing plate of the present invention is bonded to a liquid crystal cell via the adhesive layer or the like.
  • the polarizing plate of the present invention includes various types such as a reflective type, a transmissive type, a transflective type LCD, a TN type, an STN type, an OCB type, a HAN type, a VA type (PVA type, MVA type), and an IPS type (including an FFS type). It is preferably used in a drive type LCD.
  • a VA type PVA type, MVA type
  • IPS type including an FFS type
  • Acrylic resins A-1 to 74 in Tables 1 and 2 were prepared by a known method.
  • ACMO is acryloylmorpholine
  • MACMO methacryloylmorpholine
  • AAm is acrylamide
  • VP vinylpyrrolidone
  • DMAAm is N, N-dimethylacrylamide
  • HEAAm is N-hydroxyethylacrylamide
  • VFAAm is N-vinylformamide
  • ACPIPE is acryloylpiperidine
  • HEMA is hydroxymethacrylate.
  • Acrylic resin A-1 (dried at 90 ° C for 3 hours and water content 1000ppm) 70 parts by mass
  • the pellet is dried by circulating 70 ° C dehumidified air for more than 5 hours. It was carried out, while maintaining the temperature of 100 ° C., and introduced into the uniaxial extruder in the next step. A small amount of the pellet was taken out and the water content was measured and found to be 120 ppm.
  • the cellulose ester film was produced using the production apparatus shown in FIG.
  • the above pellets were melt extruded from a T die onto a first cooling roll having a surface temperature of 90 ° C. at a melting temperature of 240 ° C. using a single screw extruder to obtain a 120 ⁇ m cast film. At this time, the film was pressed on the first cooling roll with an elastic touch roll having a 2 mm thick metal surface.
  • the obtained film was stretched 60% in the transport direction at 175 ° C. by a stretching machine using a difference in peripheral speed of the roll.
  • a tenter having a preheating zone, a stretching zone, a holding zone, and a cooling zone (there is also a neutral zone for ensuring thermal insulation between the zones), and is 70 ° C at 175 ° C in the width direction.
  • the film was cooled to 30 ° C., then released from the clip, and the clip gripping part was cut off to obtain an optical film sample 1 having a film thickness of 40 ⁇ m and a film width of 2500 mm.
  • acrylic resin A and cellulose ester resin B were mixed as shown in Table 3 to prepare optical film samples 2 to 133.
  • Samples 16, 31, 39, 47, 55, 63, 71, 79, 89, 94, 99 had high melt viscosity, and it was difficult to obtain a cast film by melt extrusion.
  • the melting temperature was set for each resin mixture as a temperature at which the melt viscosity becomes 1000 Pa ⁇ s.
  • the optical film sample was cut out at 120 mm (length) x 10 mm (width) and heated at a rate of 30 ° C / min while being pulled with a tension of 10 N. Subsequently, the temperature at 9 N was measured three times, and the average temperature was obtained. Practically 125 ° C. or higher is considered good.
  • ⁇ A beautifully round hole is opened. ⁇ : There is a slight crack at the cut. ⁇ : A crack with a length of more than half of the hole diameter is formed.
  • ⁇ The tear surface is very smooth and is torn straight.
  • ⁇ The tear surface has some burrs, but it is torn straight.
  • ⁇ Preparation of polarizing plate> Using the optical film samples 1 to 133 prepared as described above, the alkali saponification treatment described below was performed to prepare a polarizing plate.
  • the KC4UY manufactured by Konica Minolta Opto Co., Ltd. was similarly saponified on one side of the polarizer, and the optical film sample of the present invention subjected to the alkali saponification treatment was bonded to the opposite side with a completely saponified polyvinyl alcohol 5% aqueous solution.
  • the agent each was bonded so that the transmission axis of the polarizer and the in-plane slow axis of the film were parallel to each other, and dried to prepare a polarizing plate.
  • the polarizing plate was cut into rectangles, the optical film and the polarizer were peeled off while squeezing the corners by hand, and ranking was performed according to how they were peeled off.
  • the obtained polarizing plate was carefully peeled off from the viewing side polarizing plate previously bonded to the liquid crystal display device Wooo W32L-H90 manufactured by Hitachi, Ltd., which is an IPS type liquid crystal display device, and transmitted through the polarizing plate originally applied.
  • a polarizing plate was attached so that the optical film of the present invention produced through an adhesive was on the viewing side

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  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
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  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Materials Engineering (AREA)
  • Polarising Elements (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)

Abstract

L'invention porte sur : un film optique qui n'est pas prédisposé à la fuite de lumière et qui présente une bonne adhérence à un polariseur ; une plaque polarisante ; et un dispositif d'affichage à cristaux liquides. De façon spécifique, l'invention porte sur un film optique, qui contient une résine acrylique (A) et une résine d'ester de cellulose (B) en un rapport massique de 95:5 à 50:50 et qui est caractérisé en ce que la résine acrylique (A) est représentée par la formule générale (1) et a une masse moléculaire moyenne en poids (Mw) de 20 000-1 000 000 (inclus). Formule générale (1) : -(MMA)p-(X)q-(Y)r- Dans la formule, MMA représente le méthacrylate de méthyle ; X représente la vinylpyrrolidone ; Y représente un motif monomère qui est copolymérisable avec MMA et X ; et p, q et r représentent respectivement les pourcentages molaires et satisfont aux relations 50 ≤ p ≤ 99, 1 ≤ q ≤ 50 et p + q + r = 100.
PCT/JP2010/065390 2010-03-30 2010-09-08 Film optique, plaque polarisante et dispositif d'affichage à cristaux liquides Ceased WO2011121817A1 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2022145436A1 (fr) * 2021-01-04 2022-07-07

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008120596A1 (fr) * 2007-04-03 2008-10-09 Konica Minolta Opto, Inc. Film optique en ester de cellulose, plaque polarisante et dispositif d'affichage à cristaux liquides utilisant le film optique en ester de cellulose, procédé de fabrication du film optique en ester de cellulose, et copolymère
JP2009096955A (ja) * 2007-10-19 2009-05-07 Konica Minolta Opto Inc 光学フィルム、偏光板、液晶表示装置
WO2009060743A1 (fr) * 2007-11-05 2009-05-14 Konica Minolta Opto, Inc. Film de compensation optique et plaque de polarisation et dispositif d'affichage à cristaux liquides utilisant le film de compensation optique
JP2009299075A (ja) * 2007-10-13 2009-12-24 Konica Minolta Opto Inc 光学フィルム
WO2010016369A1 (fr) * 2008-08-05 2010-02-11 コニカミノルタオプト株式会社 Film optique, procédé de production du film optique, plaque polarisante, et dispositif d'affichage à cristaux liquides
WO2010082397A1 (fr) * 2009-01-19 2010-07-22 コニカミノルタオプト株式会社 Film optique, polariseur, et dispositif d'affichage à cristaux liquides

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008120596A1 (fr) * 2007-04-03 2008-10-09 Konica Minolta Opto, Inc. Film optique en ester de cellulose, plaque polarisante et dispositif d'affichage à cristaux liquides utilisant le film optique en ester de cellulose, procédé de fabrication du film optique en ester de cellulose, et copolymère
JP2009299075A (ja) * 2007-10-13 2009-12-24 Konica Minolta Opto Inc 光学フィルム
JP2009096955A (ja) * 2007-10-19 2009-05-07 Konica Minolta Opto Inc 光学フィルム、偏光板、液晶表示装置
WO2009060743A1 (fr) * 2007-11-05 2009-05-14 Konica Minolta Opto, Inc. Film de compensation optique et plaque de polarisation et dispositif d'affichage à cristaux liquides utilisant le film de compensation optique
WO2010016369A1 (fr) * 2008-08-05 2010-02-11 コニカミノルタオプト株式会社 Film optique, procédé de production du film optique, plaque polarisante, et dispositif d'affichage à cristaux liquides
WO2010082397A1 (fr) * 2009-01-19 2010-07-22 コニカミノルタオプト株式会社 Film optique, polariseur, et dispositif d'affichage à cristaux liquides

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2022145436A1 (fr) * 2021-01-04 2022-07-07
WO2022145436A1 (fr) * 2021-01-04 2022-07-07 株式会社カネカ Procédé de production d'un film étiré

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