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KR20160037117A - Optical film, polarizing plate equipped with the optical film, liquid crystal display device, and method for producing an optical film - Google Patents

Optical film, polarizing plate equipped with the optical film, liquid crystal display device, and method for producing an optical film Download PDF

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Publication number
KR20160037117A
KR20160037117A KR1020150137035A KR20150137035A KR20160037117A KR 20160037117 A KR20160037117 A KR 20160037117A KR 1020150137035 A KR1020150137035 A KR 1020150137035A KR 20150137035 A KR20150137035 A KR 20150137035A KR 20160037117 A KR20160037117 A KR 20160037117A
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South Korea
Prior art keywords
film
polarizing plate
optical film
hard coat
coat layer
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KR1020150137035A
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Korean (ko)
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지히로 야스시타
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후지필름 가부시키가이샤
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    • 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
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G02B1/14—Protective coatings, e.g. hard coatings
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B23/00—Layered products comprising a layer of cellulosic plastic substances, i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose
    • B32B23/04—Layered products comprising a layer of cellulosic plastic substances, i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose comprising such cellulosic plastic substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B23/08—Layered products comprising a layer of cellulosic plastic substances, i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose comprising such cellulosic plastic substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B23/00—Layered products comprising a layer of cellulosic plastic substances, i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose
    • B32B23/20—Layered products comprising a layer of cellulosic plastic substances, i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose comprising esters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/38—Layered products comprising a layer of synthetic resin comprising epoxy resins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
    • C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
    • C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
    • C08G59/62—Alcohols or phenols
    • C08G59/621—Phenols
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
    • C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
    • C08G63/12—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from polycarboxylic acids and polyhydroxy compounds
    • C08G63/16—Dicarboxylic acids and dihydroxy compounds
    • C08G63/18—Dicarboxylic acids and dihydroxy compounds the acids or hydroxy compounds containing carbocyclic rings
    • C08G63/19—Hydroxy compounds containing aromatic rings
    • C08G63/193—Hydroxy compounds containing aromatic rings containing two or more aromatic rings
    • C08G63/195—Bisphenol A
    • C08J7/047—
    • 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
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
    • G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133528—Polarisers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/412—Transparent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/42—Polarizing, birefringent, filtering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/536—Hardness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2457/00—Electrical equipment
    • B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
    • B32B2457/202—LCD, i.e. liquid crystal displays
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2551/00—Optical elements
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/50—Protective arrangements

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  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Organic Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Medicinal Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Mathematical Physics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Polarising Elements (AREA)
  • Manufacturing & Machinery (AREA)
  • Liquid Crystal (AREA)
  • Surface Treatment Of Optical Elements (AREA)
  • Laminated Bodies (AREA)

Abstract

Provided is an optical film with excellent hardness and low moisture permeability, which is favorable as a polarizing plate protection film. Also provided are a polarizing plate showing low deterioration by moisture absorption, and a liquid crystal display device. Furthermore, provided is a method for producing an optical film with excellent hardness and low moisture permeability. The optical film (the polarizing plate protection film) (110) is an optical film comprising a hard coating layer (112) on a substrate (111), and the hard coating layer (112) is formed by curing, on the substrate, a composition composed of epoxide represented by chemical formula 1, a bisphenol compound, and an optical cation polymerization initiator.

Description

TECHNICAL FIELD [0001] The present invention relates to an optical film, a polarizing plate having the optical film, a liquid crystal display, and a method of manufacturing an optical film.

The present invention relates to an optical film, a polarizing plate, a liquid crystal display, and a method for producing an optical film which are suitable as a polarizing plate protective film.

In recent years, liquid crystal display devices have been widely used for liquid crystal televisions, liquid crystal panels such as personal computers, cellular phones, and digital cameras. In general, a liquid crystal display device has a liquid crystal panel member provided with polarizing plates on both sides of a liquid crystal cell, and display is performed by controlling light from the backlighting member with a liquid crystal panel member. The polarizing plate is configured to have a polarizer and at least one polarizing plate protective film.

In recent years, liquid crystal display devices have been diversified in use with high quality and are expected to be used under various environments. Therefore, durability according to environments and performance stability are demanded. In a liquid crystal display device intended for use outdoors, in a polarizing plate, a polarizing plate protective film for protecting the surface of the polarizing plate is required to have durability such as hardness and brittleness that can withstand outdoor use, dimensional stability against temperature or humidity change, Optical stability is required. Particularly, in a high humidity environment, deterioration due to moisture absorption of the polarizer becomes a problem, and therefore, lowering the moisture permeability of the polarizing plate protective film is an important issue.

Patent Document 1 discloses an optical film obtained by curing a thermosetting resin composition comprising a polycarboxylic acid resin, an epoxy resin and / or an oxetane resin as an essential component as an optical film excellent in durability in a high temperature and high humidity environment have. In the example of Patent Document 1, the pencil hardness of the film having a thickness of 80 占 퐉 formed on the PET film (polyethylene terephthalate film) is high at H, 6B at low, and 2.8% at the lowest, .

Patent Document 2 discloses a polarizing plate comprising at least one polarizing plate protective film comprising a polarizing agent durability improving agent comprising at least one resin and a compound having a molecular weight / number of directional rings having at least one hydrogen-bonding hydrogen- A polarizing plate is disclosed.

According to the polarizing plate of Patent Document 2, polarizer durability is excellent even in an environment of high temperature and high humidity, and curl is small, and even when the polarizing plate is attached to a liquid crystal display, warping or deformation of the liquid crystal panel due to use environment, Is not described in Japanese Patent Application Laid-Open Publication No. 2000-325899.

Japanese Patent Application Laid-Open No. 2007-297604 Japanese Laid-Open Patent Publication No. 2013-174861

However, in the polarizing plate of Patent Document 1, the evaluation of hardness and absorbency of the polarizing plate protective film is carried out with a relatively thick film having a thickness of 80 탆. Considering the thickness required for a polarizing plate protective film in recent years in which a light weight and thinness of a liquid crystal display are progressing, it is difficult to say that the polarizing plate protective film of Patent Document 1 satisfies sufficient hardness and moisture permeability (see the later comparative example Reference).

In addition, in Patent Document 2, the durability is evaluated only for changes in dimensions and optical characteristics with respect to changes in temperature and humidity, and no evaluation is made on the hardness of the polarizing plate protective film. As the thinning progresses, the required hardness level of the film is increased, and it is hard to imagine sacrificing the hardness for imparting environmental resistance from the viewpoint of the protective film.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an optical film which is preferable as a polarizing plate protective film having high hardness and low moisture permeability.

Another object of the present invention is to provide a polarizing plate and a liquid crystal display device which are less deteriorated by moisture absorption.

In the optical film of the present invention,

An optical film comprising a hard coat layer on a substrate,

Wherein the hard coat layer is a layer in which the photocurable composition is cured on a substrate, and the photocurable composition comprises an epoxide represented by the following formula (I), a bisphenol compound and a photocathode polymerization initiator. The method for producing an optical film according to the present invention is a method for producing an optical film comprising a hard coat layer on a substrate, comprising the steps of: forming on the substrate an epoxide, a bisphenol compound, And a hard coat layer is formed by curing the coating film by irradiating light to the coating film.

[Chemical Formula 1]

Figure pat00001

In the optical film and the production method of the optical film of the present invention, the bisphenol compound is preferably represented by the following formula II-1, more preferably represented by the following formula II-2.

(2)

Figure pat00002

In the formulas, R 1 and R 2 represent a hydrogen atom, a halogen atom or a hydrocarbon group of 1 to 15 carbon atoms. X is a divalent linking group composed of a single bond, a hydrocarbon group having 1 to 15 carbon atoms, an oxygen atom, a sulfur atom, and a sulfonyl group.

(3)

Figure pat00003

In the formula, R 1 , R 2 , R 3 and R 4 represent hydrogen or a hydrocarbon group having 1 to 15 carbon atoms, and R 3 and R 4 may combine to form a cyclic structure.

In the formula (I), the formula (II-1) and the formula (II-2), the hydrocarbon group having 1 to 15 carbon atoms may be any of linear, branched and cyclic.

In the formulas II-1 and II-2, R 1 and R 2 are preferably hydrogen or a hydrocarbon group having 1 to 6 carbon atoms, more preferably R 1 is hydrogen and R 2 is a methyl group.

In the optical film and the production method of the optical film of the present invention, the content of the bisphenol compound in the total solid content of the photocurable composition is preferably 1 to 40%.

The base material is preferably a cellulose ester base material.

The light to be irradiated onto the coating film formed by applying the photocurable composition is preferably ultraviolet light. The light irradiation is preferably carried out in a state in which the substrate on which the coating film has been formed is heated, and it is preferable not to heat the substrate after light irradiation.

The optical film of the present invention is preferable as a polarizing plate protective film.

The polarizing plate of the present invention comprises a polarizer and an optical film of the present invention on at least one surface of the polarizer.

The liquid crystal display of the present invention is a liquid crystal display device having a pair of polarizing plates and liquid crystal cells sandwiched between the pair of polarizing plates, wherein at least one of the pair of polarizing plates is the polarizing plate of the present invention.

In the present specification, the term "low moisture permeability (low moisture permeability)" of the optical film means that the optical film has a moisture permeability of 200 g / m 2 after 24 hours at 40 ° C. and 90% relative humidity in accordance with JIS Z 0208, M 2 / day or less.

The "hardness (high hardness)" of the optical film means that the hardness of the optical film means that the pencil hardness of JIS K5600-5-4 is F or more.

The optical film of the present invention is an optical film comprising a hard coat layer on a substrate, which is obtained by coating a photocurable composition containing an epoxide represented by the above formula (I), a bisphenol compound and a photocathon polymerization initiator on a substrate, And a hard coat layer is formed by curing the coating film by irradiating light to the coating film. The hard-coat layer in which such a photocurable composition is photo-cured has high hardness and low moisture permeability. Therefore, according to the present invention, it is possible to provide an optical film which is preferable as a polarizing plate protective film having high hardness and low moisture permeability.

The polarizing plate of the present invention comprises the above-mentioned optical film of the present invention as a polarizing plate protective film. Therefore, according to the present invention, it is possible to provide a polarizing plate and a liquid crystal display device which are less deteriorated by moisture absorption.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic cross-sectional view showing a configuration of an optical film according to an embodiment of the present invention. FIG.
2 is a schematic cross-sectional view showing the configuration of a polarizing plate according to an embodiment of the present invention.
3 is a schematic perspective view showing a configuration of a liquid crystal display device according to an embodiment of the present invention.

"Optical film (polarizer protective film)"

An optical film (polarizing plate protective film) according to an embodiment of the present invention will be described with reference to the drawings. 1 is a schematic view showing a configuration of an optical film 110 according to an embodiment of the present invention. In addition, in order to facilitate visibility, the scale of each part is appropriately changed in the drawings of the present specification. In the present specification, when the numerical value indicates a physical property value, a characteristic value or the like, the description "(numerical value 1) to (numerical value 2)" means "(numerical value 1) or more (numerical value 2) or less".

1, the optical film 110 is provided with a hard coat layer 112 on a substrate 111, and the hard coat layer 112 is formed by laminating a photocurable composition on a substrate 111 Cured layer. The photocurable composition comprises an epoxide (compound 1a) represented by the following formula (I), a bisphenol compound, and a photocathode polymerization initiator.

[Chemical Formula 1]

Figure pat00004

The hard coat layer 112 obtained by curing such a photocurable composition is preferable as a film member requiring high hardness and low moisture permeability because of its high hardness and low moisture permeability. Each component of the optical film 110 will be described.

<Description>

Examples of the substrate 111 include, but not particularly limited to, a cellulose ester film, a polycarbonate film, a polyester film such as polyethylene terephthalate and polyethylene naphthalate, a (meth) acrylic film such as polymethyl methacrylate, Styrene copolymer films such as nitrile-styrene copolymer, and cyclic polyolefin-based films. The substrate 111 is preferably a cellulose ester film because the epoxide (monomer) of the compound 1a tends to permeate and the adhesion between the substrate and the polarizing plate resin film is high.

As the cellulose ester base material, a known film, plate, sheet or the like made of cellulose ester can be used, and there is no particular limitation. As the cellulose ester film, a cellulose acylate film (for example, a cellulose triacetate film (refractive index: 1.48), a cellulose diacetate film, a cellulose acetate butyrate film, a cellulose acetate propionate film) and the like can be used.

Among them, a cellulose acylate film which is high in transparency, optically less birefringence, easy to manufacture, and generally used as a protective film of a polarizing plate is preferable, and a cellulose triacetate film is more preferable. The transparency of the base material 111 is preferably 80% or more of the transmittance of visible light.

As the cellulose acylate film, it is preferable to use cellulose acetate having an acetylation degree of 59.0 to 61.5%.

The degree of acetylation refers to the amount of bound acetic acid per mass of cellulose unit. The degree of acetylation is determined according to the measurement and calculation of the degree of acetylation in ASTM: D-817-91 (Test Method such as Cellulose Acetate). The viscosity average degree of polymerization (DP) of the cellulose acylate is preferably 250 or more, more preferably 290 or more.

The cellulose acylate film base preferably has a value of Mw / Mn (Mw is a weight average molecular weight and Mn is a number average molecular weight) by gel permeation chromatography is close to 1.0, in other words, a molecular weight distribution is narrow. The specific Mw / Mn value is preferably 1.0 to 1.7, more preferably 1.3 to 1.65, and most preferably 1.4 to 1.6.

Generally, the hydroxyl groups at 2, 3, and 6 of cellulose acylate are not uniformly distributed at 1/3 of the total degree of substitution, and the degree of substitution of 6-position hydroxyl groups tends to be small. In the present invention, the degree of substitution of the 6-position hydroxyl group of the cellulose acylate is preferably larger than that at the 2 and 3 positions. It is preferable that the 6-position hydroxyl group is substituted with 32% or more acyl groups relative to the total degree of substitution, more preferably 33% or more, particularly preferably 34% or more. And the substitution degree of the 6-position acyl group of the cellulose acylate is preferably 0.88 or more. The 6-position hydroxyl group may be substituted with an acyl group having 3 or more carbon atoms, such as a propionyl group, a butyroyl group, a valeroyl group, a benzoyl group, an acryloyl group, etc. in addition to an acetyl group. The degree of substitution at each position can be determined by NMR.

Examples of the cellulose acylate preferable as the base material 111 include those described in JP-A-11-5851, paragraphs 0043 to 0044 [Examples] [Synthesis Example 1], paragraphs 0048 to 0049 2], and the cellulose acetate obtained by the method described in the paragraphs "0051" to "0052" [Synthesis Example 3].

The thickness of the base material 111 is usually about 20 to 1000 mu m. When the base material 111 is a cellulose ester base material, it is preferable that the film thickness is 20 mu m or more and 70 mu m or less.

<Hard coat layer>

As described above, the hard coat layer 112 is formed by curing a coated film-formed photocurable composition on a substrate 111. First, the photocurable composition of the present embodiment will be described.

&Lt; Photocurable composition &gt;

The photocurable composition to be coated on the base material 111 comprises an epoxide (compound 1a) represented by the following formula (I), a bisphenol compound and a photocathode polymerization initiator.

[Chemical Formula 1]

Figure pat00005

(Epoxide (compound la))

The epoxide (Compound 1a) is a bifunctional epoxide. By being bifunctional, a crosslinked hard coat layer having a three-dimensional network structure can be obtained. In the crosslinked polymer film, the hardness of the film is higher than that of the uncrosslinked film.

The content of the compound (1a) is preferably 50% by mass or more, more preferably 60% by mass or more, from the viewpoint of achieving both low moisture permeability and high hardness, relative to the total solid content in the photocurable composition.

Further, from the viewpoint of securing the curability, the content of the compound 1a is preferably 99.5% by mass or less, more preferably 99% by mass or less, based on the total solid content in the photocurable composition.

The inventors of the present invention have found that when the molecular weight of the polyfunctional epoxy monomer is 270 or less, preferably 140 or more and 260 or less, the molecular weight between the crosslinking points in the polymerized product can be reduced and the moisture permeability can be lowered. Further, the inventor of the present invention has found that when the polyfunctional epoxy monomer has a cycloalkane as a cyclic skeleton in addition to an epoxy ring, it is possible to suppress the degradation of the hardness due to excessive plasticization when an additive giving low moisture permeability is added I found out. Compound 1a is an epoxy monomer preferred from the standpoint of low moisture permeability and hardness, which the present inventors have found by conducting molecular design.

Compound 1a is an epoxy monomer capable of imparting a polymer having excellent low moisture permeability and high hardness, but by polymerizing a bisphenol compound as an additive, it is possible to lower the polymerizability of the compound 1a.

(Bisphenol compound)

The inventors of the present invention have conducted intensive studies on an additive capable of lowering the water vapor permeability without lowering the hardness of the polymeric material excessively when an epoxy monomer of the compound 1a is used.

As a result, the present inventors have found that a bisphenol compound can be such a low moisture breathing agent, and have completed the present invention. The bisphenol compound is known to be used as an antioxidant. However, the present inventors have now found that a bisphenol compound has a very high effect of imparting low moisture permeability and does not significantly affect the hardness of the resin even when a high concentration is added.

In Examples 2 to 5, even when the addition amount of the bisphenol compound was doubled, quadrupled, and six times, the pencil hardness was maintained at H, while the moisture permeability was remarkably improved in the low moisture permeability .

Patent Document 2 discloses a compound having a phenol structure as a general formula (1) of a polarizer durability improving agent comprising a compound having a molecular weight / number of directional rings having at least one hydrogen-bonding hydrogen-donating group of 300 or less. However, Patent Document 2 does not describe a specific example of the bisphenol compound, and there is no description about the characteristics of the bisphenol compound.

Hereinafter, preferred bisphenol compounds in the present embodiment will be described.

The bisphenol compound is not particularly limited, but a bisphenol compound represented by the following formula II-1 is preferable, and a bisphenol compound represented by the following formula II-2 is more preferable.

(2)

Figure pat00006

In the formulas, R 1 and R 2 represent a hydrogen atom, a halogen atom or a hydrocarbon group of 1 to 15 carbon atoms. X is a divalent linking group composed of a single bond, a hydrocarbon group having 1 to 15 carbon atoms, an oxygen atom, a sulfur atom, and a sulfonyl group.

(3)

Figure pat00007

In the formula, R 1 , R 2 , R 3 and R 4 represent hydrogen or a hydrocarbon group having 1 to 15 carbon atoms, and R 3 and R 4 may combine to form a cyclic structure.

In the general formulas II-1 and II-2, it is preferable that R 1 and R 2 are hydrogen or a hydrocarbon group having 1 to 6 carbon atoms, R 1 is hydrogen, R 2 is a methyl group Is more preferable.

The content of the bisphenol compound in the total solid content of the photocurable composition is preferably 1 to 40%.

Specific preferred examples of the bisphenol compound are shown below, but the present invention is not limited to these specific examples.

[Chemical Formula 4]

Figure pat00008

[Chemical Formula 5]

Figure pat00009

[Chemical Formula 6]

Figure pat00010

(7)

Figure pat00011

[Chemical Formula 8]

Figure pat00012

[Chemical Formula 9]

Figure pat00013

[Chemical formula 10]

Figure pat00014

(11)

Figure pat00015

[Chemical Formula 12]

Figure pat00016

[Chemical Formula 13]

Figure pat00017

(Photocathione polymerization initiator)

The epoxy ring of the compound 1a causes a polymerization reaction when the active energy is irradiated in the presence of a photocationic polymerization initiator. Specific examples of the photocathion polymerization initiator include sulfonium salts, iodonium salts and diazonium salts. Specific examples thereof include "Irgacure 290 (trade name, BASF)", "Irgacure 250 (same)", "Irgacure 270 CPI-200P (same) "," CPI-210S (same) "," WPI-170 (trade name, product name, manufactured by Wako Pure Chemical Industries, And the diaryliodonium salts described in claim 1 of Japanese Patent No. 4841935 can be used.

The content of the photocathode polymerization initiator is preferably 0.5 to 8% by mass, more preferably 1 to 5% by mass, based on the total solid content in the photocurable composition, because the epoxy ring is polymerized and the initiation point is set so as not to excessively increase, Is more preferable.

(solvent)

The photocurable composition may contain a solvent. As the solvent, various solvents may be used in consideration of the solubility of the monomer, the dryness upon application, the dispersibility of the light-transmitting particles, and the like. Examples of the organic solvent include dibutyl ether, dimethoxyethane, diethoxyethane, propylene oxide, 1,4-dioxane, 1,3-dioxolane, 1,3,5-trioxane, tetra Examples of the organic solvent include at least one organic solvent selected from the group consisting of hydrochlorofuran, anisole, phenol, dimethyl carbonate, methyl carbonate, diethyl carbonate, acetone, methyl ethyl ketone (MEK), diethyl ketone, , Methylcyclohexanone, ethyl formate, propyl formate, pentyl formate, methyl acetate, ethyl acetate, propyl acetate, methyl propionate, ethyl propionate,? -Butyrolactone, methyl 2-methoxyacetate, 2-butoxyethanol, 1,2-diacetoxyacetone, acetylacetone, diacetone alcohol, acetoacetic acid, acetoacetic acid, and acetoacetic acid. Methyl, ethyl acetoacetate and the like, ethyl alcohol , Isopropyl alcohol, n-butyl alcohol, cyclohexyl alcohol, isobutyl acetate, methyl isobutyl ketone (MiBK), 2-octanone, 2-pentanone, 2-hexanone, ethylene glycol ethyl ether, There may be mentioned ether, ethylene glycol butyl ether, propylene glycol methyl ether, ethyl carbitol, butyl carbitol, hexane, heptane, octane, cyclohexane, methylcyclohexane, ethylcyclohexane, benzene, toluene, The species may be used singly or in combination of two or more species.

Among these solvents, at least one of methyl acetate, ethyl acetate, methyl ethyl ketone, acetylacetone, acetone, cyclohexanone, toluene and xylene is preferably used.

Among them, it is preferable to use at least one of methyl acetate, methyl ethyl ketone, acetone, and cyclohexanone from the viewpoint of having permeability to the base material 111, particularly the cellulose ester base material.

The solvent is preferably used so that the concentration of the solid content in the photocurable composition is in the range of 5 to 90% by mass.

In the photocurable composition, a solvent, an inorganic filler, an ultraviolet absorber, a surfactant, and a light-transmitting resin particle may be further added, if necessary. Hereinafter, each component will be described.

[Inorganic filler]

The inorganic filler can be added to the photocurable composition by controlling the type and amount of the inorganic filler depending on the required refractive index, film strength, film thickness, coating property and the like.

The shape of the inorganic filler is not particularly limited, and for example, a spherical shape, a plate shape, a fibrous shape, a rod shape, an amorphous shape, and a hollow shape are preferably used.

The type of the inorganic filler is not particularly limited, but amorphous is preferably used, and it is preferably composed of an oxide, a nitride, a sulfide or a halide of a metal, particularly preferably a metal oxide, and most preferably silica. The metal reactant may be at least one selected from the group consisting of Na, K, Mg, Ca, Ba, Al, Zn, Fe, Cu, Ti, Sn, In, W, Y, Sb, Mn, Ga, V, Nb, Ta, Ag, Bi, Mo, Ce, Cd, Be, Pb and Ni. In order to increase the affinity between the inorganic filler and the organic component, the surface of the inorganic filler may be treated with a surface modifier containing an organic segment.

The average particle diameter of the inorganic filler is preferably in the range of 0.001 to 0.2 mu m, more preferably 0.001 to 0.1 mu m, and still more preferably 0.001 to 0.06 mu m in order to obtain a transparent cured film. Here, the average particle diameter of the particles is measured by a Coulter counter.

The inorganic filler can be used in a dry state or in a state of being dispersed in water or an organic solvent.

[Ultraviolet absorber]

The polarizing plate protective film of the present invention can be used for a polarizing plate or an image display device member. However, from the viewpoint of preventing deterioration of the polarizing plate or the liquid crystal cell, the polarizing plate protective film may contain a UV absorbing agent in the hard- Ultraviolet ray absorbing property may be imparted.

As the ultraviolet absorber, any known ultraviolet absorber may be used. For example, the ultraviolet absorber described in Japanese Patent Application Laid-Open No. 2001-72782 or Japanese Patent Application Laid-Open No. 2002-543265 can be mentioned.

As the ultraviolet absorber, it is preferable to use ultraviolet absorbers having an absorption capacity of ultraviolet rays of a wavelength of 370 nm or less and having a small absorption of visible light of 400 nm or more in wavelength from the viewpoint of good liquid crystal display properties. The ultraviolet absorber may be used alone or in combination of two or more. For example, the ultraviolet absorber described in Japanese Patent Application Laid-Open No. 2001-72782 or Japanese Patent Application Laid-Open No. 2002-543265 can be mentioned. Specific examples of the ultraviolet absorber include, for example, oxybenzophenone compounds, benzotriazole compounds, salicylic ester compounds, benzophenone compounds, cyanoacrylate compounds, nickel complex salt compounds, triazine compounds, .

[Transparent resin particle]

The light-curable resin composition for forming a hard coat layer of the present embodiment may contain light-transmitting resin particles (also referred to as light-diffusing particles). The surface of the hard coat layer 112 may be provided with an irregular shape or an internal haze may be imparted by including translucent particles in the hard coat layer forming photocurable resin composition.

The average particle diameter of the light transmitting resin particles is 1.0 占 퐉 to 8.0 占 퐉, preferably 1.2 占 퐉 to 6.0 占 퐉, and more preferably 1.4 占 퐉 to 3.0 占 퐉. In the present specification, the average particle diameter indicates the primary particle diameter. When the average particle diameter is 1.0 占 퐉 or more, the surface roughness of the hard coat layer 112 can be appropriately increased by controlling the agglomeration of the particles, and the scattering property is manifested. When a desired surface shape is to be formed with particles having an average particle diameter of 3.0 m or less, it is not necessary to make the thickness of the hard coat layer 112 excessively large, and deterioration of curl and brittleness can be suppressed.

As means for adjusting the surface irregularity shape to a specific range, it is also preferable to use two or more kinds of particles having different average particle diameters.

The method of measuring the particle diameter of the light transmitting resin particle may be any measuring method as long as it is a measuring method for measuring the particle diameter of the particle. The particle size distribution of the particle is measured by the Coulter counter method, , Or a method of observing the particles with a transmission electron microscope (magnification: 500,000 to 2,000,000 times), observing 100 particles, and setting the average value to an average particle size.

In this specification, the average particle diameter is a value obtained by the Coulter counter method.

In order to form the surface irregularities in the hard coat layer 112, the ratio of the film thickness of the hard coat layer (the film thickness of the hard coat layer / the average particle diameter of the light-transmitting resin particles) to the average particle diameter of the light- 2.0, more preferably 1.1 to 1.9, and further preferably 1.2 to 1.8. If the ratio is 1.0 or more, the unevenness of the film surface does not become too large, and is excellent in terms of black tightness and point defects. On the other hand, if it is 2.0 or less, it is not necessary to add a large amount of particles in order to attain desired antiglare property, and it is excellent in view of the hardness of the film.

When forming the concavo-convex shape on the surface of the hard coat layer 112, it is preferable to design the arithmetic mean roughness Ra of the surface convexo-concave shape to 0.01 to 0.25 mu m, more preferably 0.01 to 0.20 mu m, 0.01 to 0.15 mu m. When the value of Ra is 0.01 mu m or more, clear dazzling property is obtained, and when the value of Ra is 0.25 mu m or less, high black density is exhibited.

The haze value in the hard coat layer 112 is preferably designed to be 0.3 to 5.0%, more preferably 0.5 to 3.0%, and still more preferably 0.5 to 2.0%. By designing the haze in this range, it is possible to achieve both good flash-resistance and black density.

The refractive index of the translucent resin particle is adjusted such that the translucent particles are equally dispersed in a solvent in which the refractive index is changed by changing the mixing ratio of two kinds of solvents having different refractive indices, which are selected from methylene iodide, 1,2-dibromopropane and n- And the turbidity is measured by measuring the refractive index of the solvent when the turbidity becomes minimum, using an Abbe refractometer.

The light transmitting resin particle can be designed to have a difference in refractive index from the refractive index of the antiglare layer excluding the light transmitting resin particle to 0.010 or less because the contrast can be lowered by controlling the difference in refractive index between the binder and the internal scattering property. , And the difference in refractive index between the light transmitting resin particle and the binder is 0.01 or less, preferably 0.005 or less, and more preferably 0. [ By setting the refractive index difference within this range, it is possible to substantially eliminate the decrease in contrast caused by the internal scattering.

Specific examples of the light transmitting resin particle include, for example, crosslinked polymethyl methacrylate particles, crosslinked methyl methacrylate-styrene copolymer particles, crosslinked polystyrene particles, crosslinked methyl methacrylate-methyl acrylate copolymer particles, crosslinked methyl methacryl Styrene copolymer particles, latex-styrene copolymer particles, melamine-formaldehyde resin particles, benzoguanamine-formaldehyde resin particles, and the like. Among them, crosslinked polystyrene particles, crosslinked polymethylmethacrylate particles, crosslinked methylmethacrylate-styrene copolymer particles and the like are preferable. Further, surface-modified particles obtained by chemically bonding a compound containing fluorine atoms, silicon atoms, carboxyl groups, hydroxyl groups, amino groups, sulfonic acid groups, phosphoric acid groups, etc., or inorganic fine particles of nano size such as silica or zirconia, Bonded particles are examples.

The number of the light transmitting resin particles used in the present embodiment may be one or two or more. The content of the light transmitting resin particle is preferably 0.5 to 12 mass%, more preferably 1 to 10 mass%, and more preferably 2 to 8 mass% with respect to the total solid content in the hard coat layer-forming photocurable composition from the viewpoint of imparting the light- % By mass is more preferable.

〔Surfactants〕

The photocurable composition of the present embodiment preferably contains any one of a fluorine-based or silicone-based surfactant, or both, in order to ensure uniformity of the surface such as coating irregularity, drying irregularity, and point defect. Particularly, the fluorine-based surfactant can be preferably used because it exhibits an effect of improving surface defects such as nonuniform coating, drying non-uniformity, and point defect at a smaller addition amount. High productivity can be achieved by increasing the uniformity of the surface and by having a high-speed application suitability.

Preferable examples of the fluorine-based surfactant include a fluoroaliphatic group-containing copolymer (hereinafter also abbreviated as &quot; fluorine-based polymer &quot;). Specific examples of the fluorine-based polymer are described in [0037] to [0045] of Japanese Laid-Open Patent Publication No. 2005-115359 and in [0063] to [0071] of Japanese Laid-Open Patent Publication No. 2006-117915.

The amount of the fluorine-based polymer to be added as the surfactant is preferably in the range of 0.001 to 5 parts by mass, more preferably in the range of 0.005 to 3 parts by mass, and more preferably in the range of 0.01 to 1 part by mass, based on 100 parts by mass of the coating liquid . If the addition amount of the fluorine-based polymer is 0.001 parts by mass or more, the effect of adding the fluorine-based polymer is sufficiently obtained. If the amount is less than 5 parts by mass, drying of the coating film may not be sufficiently performed or the performance (e.g., reflectance, There is no problem of adversely affecting the image quality.

The photocurable composition of the present embodiment is configured as described above.

In the optical film 110, the hard coat layer 112 is formed by applying the above-described photocurable composition onto a base material 111, and then curing the photocurable composition by irradiating light onto the obtained coating film. As light to be irradiated, ultraviolet light is preferable, the illuminance of ultraviolet light is preferably 10 to 5000 mW / cm 2, and the irradiation amount is preferably 10 to 10,000 mJ / cm 2.

It is preferable that the hard coat layer 112 is irradiated with light in the range of 10 to 90 占 폚 in the base material 111 coated with the photocurable composition and it is preferable to irradiate light in the state of 30 to 90 占 폚 desirable. Within this temperature range, the reaction of the epoxy monomer can be promoted effectively. In order to keep the temperature within this range, it may be heated as required. The temperature of the base material 111 at this time can be measured by PT-2LD manufactured by OPTEX Co.,

The hard coat layer 112 may be formed by heating after irradiating ultraviolet rays. However, if desired performance can be obtained after light irradiation, the hard coat layer 112 may be irradiated with light from the viewpoint of the complicated process and the damage to the substrate or other layers It is preferable not to warm up afterwards.

The thickness of the hard coat layer 112 formed as described above is not particularly limited, but is preferably in the range of 3 탆 to 30 탆, more preferably in the range of 4 탆 to 20 탆, further preferably in the range of 5 탆 to 15 탆 Do. When the film thickness of the hard coat layer is 3 mu m or more, sufficient hard coatability can be obtained and moisture permeability can be lowered. When the thickness is 30 mu m or less, drying in the coating and drying step on the substrate is easy , And further excellent brittleness can be obtained.

The film thickness of the hard coat layer 112 can be obtained by measuring the film thickness before and after the lamination of the hard coat layer.

The optical film 110 has no layer between the substrate 111 and the hard coat layer 112 as a representative example. However, between the substrate 111 and the hard coat layer 112, Other layers may be provided within the range in which the effect of the invention can be obtained.

For example, the optical film 110 and the hard coat layer 112 are provided between the substrate 111 and the hard coat layer 112, and the hard coat layer 112 is provided between the substrate 111 and the hard coat layer 112, It is preferable that the layer 112 (the mixed layer) formed by permeating the component before curing to the completion of curing and curing in the impregnated state. By having such a layer, adhesion between the substrate 111 and the hard coat layer 112 is improved. The thickness of the mixed layer is preferably 0.1 mu m or more and 3 mu m or less. The existence and the thickness of the mixed layer can be confirmed by observing the cross section of the polarizing plate protective film 110 by an electron microscope and can be confirmed and measured by observing using, for example, a scanning electron microscope S-5200 (manufactured by Hitachi, Ltd.) have.

The optical film 110 is an optical film having a hard coat layer 112 formed on a base material 111. The optical film 110 is formed by coating on a base material 111 an epoxide represented by the above general formula I and a bisphenol compound and a photocathon polymerization initiator And a hard coat layer 112 is formed by curing the coating film by irradiating light to the coating film. The hard coat layer 112 is formed by coating a photocurable composition containing the photocurable composition. The hard-coat layer 112 in which such a photocurable composition is photo-cured becomes high in hardness and low in moisture permeability. Therefore, the optical film 110 is preferable as a polarizing plate protective film which requires high hardness and low moisture permeability.

<Polarizing plate protective film>

Since the polarizing plate protective film is the optical film 110 of the present embodiment, it has high hardness and low moisture permeability. The polarizing plate protective film is a film member for protecting the polarizing plate in the later polarizing plate 10. Therefore, in the polarizing plate 10, it is preferable that the hard coat layer 112 is disposed on the side of the polarizer on the side arranged on the outer side of the polarizer.

When the optical film 110 is used as a polarizing plate protective film, a surface treatment may be carried out if necessary, and a surface (back surface) opposite to the side where the hard coat layer 112 of the substrate 111 is formed may be treated, And another functional layer or the like may be formed between the substrate 111 and the hard coat layer 112.

The functional layer in the case of using the optical film 110 as a polarizing plate protective film is not particularly limited, but an antireflection layer (a layer in which a refractive index is adjusted such as a low refractive index layer, a medium refractive index layer and a high refractive index layer) An ultraviolet absorbing layer, and an adhesion layer (a layer for improving adhesion between the substrate and the hard coat layer).

The functional layer may be a single layer or a plurality of layers. The method of laminating the functional layers is not particularly limited.

The antireflection layer may be formed on the surface of the hard coat layer 112. As the antireflection layer, those known in the art can be preferably used. Among them, a UV-curable antireflection layer is preferable. The antireflection layer may be a low-reflectivity layer having a film thickness of? / 4 of one layer constitution or a multilayer structure, but a low-reflectivity layer having a film thickness of? / 4 of one-layer constitution is particularly preferable.

Examples of the preferable layer structure of the polarizing plate protective film 110 are shown below, but the present invention is not limited thereto.

· Base material / hard coat layer

Substrate / hard coat layer / antireflection layer

Substrate / adhesion layer / hard coat layer

Substrate / adhesion layer / hard coat layer / antireflection layer

Substrate / ultraviolet absorbing layer / hard coat layer

· Substrate / ultraviolet absorbing layer / hard coat layer / antireflection layer

Substrate / adhesion layer / ultraviolet absorbing layer / hard coat layer

Substrate / adhesion layer / ultraviolet absorbing layer / hard coat layer / antireflection layer

Substrate / hard coat layer / antiglare layer

· Base material / Hard coat layer / Antiglare layer / Antireflection layer

The polarizing plate protective film 110 may further have an optically anisotropic layer. The optically anisotropic layer may be an optically anisotropic layer in which a film having a constant retardation is uniformly formed in a plane or an optically anisotropic layer in which a retardation region in which phase difference regions are regularly arranged in a plane is formed .

The optically anisotropic layer is preferably formed on the back side of the substrate 111, but the optically anisotropic layer may be formed on the same side as the hard coat layer 112.

An embodiment having an optically anisotropic layer uniformly formed in-plane, which is preferable for the polarizing plate protective film of the present embodiment, is described in JP-A-2012-098721 and JP-A-2012-127982, An embodiment having an optically anisotropic layer is described in Japanese Patent No. 4825934 and Japanese Patent No. 4887463, and is a mode in which a photo-alignment film described in Japanese Patent Application Laid-Open Publication No. 2012-517024 (WO2010 / 090429) .

<Optical Compensation Film>

The optical film 110 can be used for various purposes in addition to the polarizing plate protective film. For example, it can be preferably used as an optical compensation film in a liquid crystal display device. The optical compensation film is an optical member which is generally used in a liquid crystal display device and compensates for the retardation, and is in agreement with a retardation plate, an optical compensation sheet, and the like. The optical compensation film has birefringence and is used for the purpose of eliminating the coloring of the display screen of the liquid crystal display device or improving the viewing angle characteristic.

The optical film 110 may be an optical compensation film itself, may be used as a base material of an optical compensation film, and an optically anisotropic layer may be formed thereon if necessary. The optically anisotropic layer to be used in combination may be formed of a composition containing a liquid crystalline compound, or may be formed of a thermoplastic film having birefringence.

&Quot; Polarizer plate, liquid crystal display device &quot;

As described above, the optical film 110 is preferable as a polarizing plate protective film which requires high hardness and low moisture permeability. A polarizing plate in which at least one surface is protected by a polarizing plate protective film made of an optical film 110 and a polarizing plate having the polarizing plate as at least a polarizing plate on the viewer side have excellent durability and deterioration due to moisture absorption The polarizing plate and the liquid crystal display device can be reduced.

The optical film 110 can be used as any of the two polarizing plates. On the other hand, in the liquid crystal display device 1, since the surface of the viewer side is most affected by environmental changes, in the present embodiment, in the polarizing plate 10 on the viewing side (front side) And the polarizing plate protective film 110 of the present embodiment is provided (see Fig. 2).

Further, of the two polarizing plates, the optical film 110 is disposed on the backlight side protective film of the backlight side polarizing plate after the optical film 110 is disposed as the protective film on the viewing side of the viewer-side polarizing plate, The optical film 110 is preferably used as a protective film on the viewer side of at least the viewer side polarizing plate among the two polarizing plates because it is preferable in that the expansion and contraction of the polarizer included in the two polarizing plates can be suppressed and the panel can be prevented from bending. .

Fig. 3 is a schematic view showing the configuration of the liquid crystal display device 1 according to the embodiment of the present invention. As shown in the figure, the liquid crystal display device 1 has a pair of polarizing plates (an upper polarizer 10 and a lower polarizer 18) and a liquid crystal cell 2 sandwiched therebetween, 2 has a liquid crystal layer 15 and upper and lower liquid crystal cell electrode formation substrates 13 and a lower liquid crystal cell electrode formation substrate 16.

The upper and lower electrode forming substrates 13 and 16 are generally formed by forming a transparent conductive film on a substrate so that a voltage is applied to the liquid crystal layer 15 through the substrate in the liquid crystal display device 1 Respectively. In this embodiment mode, an embodiment in which the liquid crystal layer 15 is sandwiched by the transparent conductive film 13 and 16 formed on the substrate is shown as an example, but a gas barrier layer, a hard coat layer, a transparent conductive film An undercoat layer (undercoat layer) or the like for enhancing adhesion may be formed. The substrate holding the liquid crystal layer 15 generally has a thickness of 50 μm to 2 mm.

When the liquid crystal display device 1 is used as a transmission type, the upper polarizer 10 is a polarizing plate on the front side (viewing side) and the lower polarizing plate 18 is a rear polarizing plate (backlight side) A color filter is provided between the backlight unit and the liquid crystal layer 15 and the front side polarizing plate 10 on the lower side of the rear side polarizing plate 18. [ In Fig. 3, reference numerals 12 and 19 denote directions of absorption axes of the respective polarizing plates, which are substantially orthogonal to each other, and reference numerals 14 and 17 denote orientation control directions of the respective electrode substrates.

In the present embodiment, an aspect in which the optical film 110 is used as a protective film on the viewer side of the viewer-side polarizing plate 10 among the two polarizing plates 10 and 18 will be described. However, , But is not limited to these embodiments.

2 is a cross-sectional view in the thickness direction showing the configuration of the polarizing plate 10 having the polarizing plate protective film (optical film) 110 of the present embodiment on its surface. As shown in the figure, the polarizing plate 10 has a polarizing plate protective film 110 made of an optical film 110 on the upper surface of the polarizer 100. In Fig. 2, the upper surface of the polarizer 100 is arranged closer to the outside air.

In the present embodiment, the polarizing plate protective film 120 on the liquid crystal cell side has the optically anisotropic layer 130 on the liquid crystal cell side. The lower polarizer 18 has a structure in which the upper polarizer 10 and the layers are stacked upside down.

The method for producing the polarizing plate 10 is not particularly limited, and can be manufactured by a general method. A polarizing plate protective film obtained is subjected to alkali treatment, and a polyvinyl alcohol film is immersed and stretched in an iodine solution, and then both surfaces of the polarizer are bonded using a completely saponified polyvinyl alcohol aqueous solution. Instead of the alkali treatment, the easy adhesion treatment described in JP-A-6-94915 and JP-A-6-118232 may be carried out. The concave surface of the polarizing plate protective film 110 and the polarizer 100 may be a surface laminated with the hard coat layer 112 or a surface opposite to the surface.

Examples of the adhesive used for bonding the polarizing plate protective film treated surface and the polarizer include polyvinyl alcohol-based adhesives such as polyvinyl alcohol and polyvinyl butyral, and vinyl-based latexes such as butyl acrylate. have. The polarizing plate protective films 110 and 120 and the polarizer 100 may be laminated with other adhesives or pressure-sensitive adhesives, or they may be laminated directly without interposing an adhesive or a pressure-sensitive adhesive.

The polarizing plate protective film is an optical film 110 of high hardness and low moisture permeability according to the present invention as described above. In the liquid crystal display device 1, the polarizing plate 10 on the front side (viewing side) (110) on the viewer's side. Therefore, according to the present embodiment, it is possible to provide the polarizing plate 10 and the liquid crystal display device 1 with little deterioration due to moisture absorption.

"Design changes"

Although the transmissive liquid crystal display device has been described as an example in the above embodiment, the liquid crystal display device is not limited to the transmissive type, and the present invention is effective for any of the reflective and transflective type liquid crystal display devices.

Although the embodiment of the liquid crystal display device has been described, the display mode of the liquid crystal cell applicable to the present invention is not particularly limited. Currently, display modes in which the present invention is effective include twisted nematic (TN), in-plane switching (IPS), ferroelectric liquid crystal (FLC), antiferroelectric liquid crystal (AFLC), optically compensated bend (OCB) Super Twisted Nematic), VA (Vertically Aligned), ECB (Electrically Controlled Birefringence), and HAN (Hybrid Aligned Nematic), and also in the display mode in which the display mode is divided by orientation.

Example

EXAMPLES Hereinafter, the present invention will be described in detail with reference to Examples, but the present invention is not limited to these Examples.

(Example 1)

First, each component was mixed with the following composition and filtered through a polypropylene filter having a pore diameter of 5 占 퐉 to prepare a photocurable composition for forming a hard coat layer.

[Composition of photocurable composition for forming hard coat layer]

Compound 1a (CEL2021P manufactured by Daicel Co., Ltd.) 33.4 parts by mass

2.6 parts by mass of Irgacure290 (BASF)

The fluoroaliphatic group-containing copolymer (a)

(Solid content concentration: 1 mass% MEK diluent) 1.0 mass part

Compound 2a (manufactured by Tokyo Chemical Industry Co., Ltd.) 15.4 parts by mass

MEK (methyl ethyl ketone) 14.6 parts by mass

MiBK (methyl isobutyl ketone) 34.0 parts by mass

[Chemical Formula 14]

Figure pat00018

As a substrate, Fujitac TG40 (manufactured by Fuji Film Co., Ltd., width 1340 mm, thickness 40 占 퐉) was unwound from the roll form, and the above-mentioned photocurable composition for forming a hard coat layer was used, and JP-A 2006-122889 Was applied by a die coating method using the slot die described in Example 1 under the condition of a transporting speed of 30 m / min, and the temperature in the coating forming equipment was adjusted, and the substrate was dried at a temperature of 60 캜 for 150 seconds. The temperature was measured by PT-2LD manufactured by OPTEX. Thereafter, using an air-cooled metal halide lamp (manufactured by Igraphics Co., Ltd.) having a nitrogen peroxide concentration of about 0.1% by volume and a substrate temperature of 25 占 폚 and a 160 W / , And irradiated with ultraviolet rays at an irradiation dose of 300 mJ / cm 2 to cure the applied layer and then take up the film to obtain a polarizing plate protective film (Example 1) having a hard coat layer on the substrate. The coating amount was adjusted so that the film thickness of the hard coat layer was 10 占 퐉.

(Examples 2 to 19 and Comparative Examples 1 to 5)

The polycarboxylic acid resin (referred to as polycarboxylic acid resin 1) described in Synthesis Example 1 of Japanese Patent Application Laid-Open No. 2007-297604 was synthesized.

Next, as shown in Table 1, a photocurable composition for forming a hard coat layer was prepared by changing the types of the epoxy monomer, additives, and the additive amount. Polarizing plate protective films (Examples 2 to 19) and comparative polarizing plate protective films (Comparative Examples 1 to 5) were obtained in the same manner as in Example 1, using the photocurable compositions for forming hardcoat layers of Examples. The coating amount was adjusted so that the film thickness of the hard coat layer was the film thickness shown in Table 1. Table 2 shows the drugs used in Examples and Comparative Examples.

The content of the polymerizable compound in Table 1 is the proportion (mass%) in the total solid content of the hard-coat layer-forming photocurable composition.

(Evaluation of polarizing plate protective film)

The polarizing plate protective films of each of the prepared examples and comparative examples were measured for film thickness and measured for moisture permeability and pencil hardness and evaluated. The measurement method and conditions are described later in (1) to (3). The evaluation results of each example are shown in Table 1.

As shown in Table 1, in Examples 1 to 19, the water vapor permeability was 200 g / m 2 / day or less. Examples 2 to 6 show changes in the moisture permeability and the pencil hardness when the same bisphenol compound 2b was added in various concentrations. In Examples 2 to 6, the hardness H was maintained at the hardness of 5% by mass to 30% by mass, and even when the concentration was 40% by mass, the moisture permeability was lowered as the concentration of the bisphenol compound in the photo- , A hardness F having no problem as a polarizing plate protective film can be obtained.

Examples 5 and 7 to 16 are polarizing plate protective films obtained by using a photo-curing composition at the same concentration of bisphenol compounds of a different kind from those of Example 1. Therefore, the effect of the bisphenol compound on the moisture permeability or pencil hardness of the structure can be confirmed by comparison with Examples 1, 5 and 7 to 16.

Example 5 uses compound 2b obtained by introducing one methyl group into each hydroxyphenyl group in the bisphenol compound 2a of Example 1, and Compound 2b obtained by introducing two methyl groups into each hydroxyphenyl group, I used it. In Examples 5 and 7, the moisture permeability is lowered than in Example 1. [ From these results, it has been shown that the introduction of the methyl group in the bisphenol compound increases the effect of lowering the moisture permeability.

Examples 8 and 9 are examples in which a bisphenol compound having a bulky group introduced into a hydroxyphenyl group is used as compared with Example 5. The introduction of this group shows that the effect of lowering the moisture permeability is less than that of the methyl group.

Example 10 is an example of introducing a cyclohexane-type skeleton into a portion to which a hydroxyphenyl group is bonded to the bisphenol compound of Example 1. It has been shown that the effect of lowering the moisture permeability is enhanced by the introduction of such groups. Example 11 is an example in which a methyl group is introduced into each hydroxyphenyl group for the bisphenol compound 3a of Example 10 and the comparison between Example 10 and Example 11 shows that the moisture permeability And the lowering effect is increased.

On the other hand, Example 12 is an example of using Compound 4 in which the methyl group is substituted for the cyclohexyl group portion of Example 10. With the introduction of the methyl group into the cyclohexyl group, the effect of lowering the moisture permeability was not observed.

Examples 13 to 16 are examples in which a bulky skeleton having a phenyl group is introduced instead of a cyclohexane-type skeleton at a portion where hydroxyphenyl groups are bonded to each other. It was confirmed that introduction of such a group had less effect of lowering the moisture permeability as compared with the cyclohexyl group.

Examples 17, 18, and 19 are the results obtained by changing the film thickness of the film formed in Example 4, and examining the change in the moisture permeability and the hardness. From these results, it was confirmed that the thicker the film thickness, the lower the moisture permeability and the higher the hardness.

Comparative Example 1 was an example in which a polarizing plate protective film was produced in the same manner as in Example 1 except that no bisphenol compound was added. Comparative Example 2 was prepared by using the following epoxide (Compound 1b) instead of the epoxide of the compound 1a Except that a polarizing plate protective film was produced in the same manner as in Example 1. [ In addition, Comparative Examples 3 to 5 are examples in which an additive other than a bisphenol compound is added to Compound 1. From these examples, it was confirmed that a sufficient low moisture permeability was achieved at a film thickness of 10 mu m by the combination of the epoxide of the compound 1a and the bisphenol compound.

[Chemical Formula 15]

Figure pat00019

[Chemical Formula 16]

Figure pat00020

[Chemical Formula 17]

Figure pat00021

(1) Thickness

The film thickness of the hard coat layer was obtained by measuring the film thickness before and after the lamination of the hard coat layer, and from the difference therebetween. The layer thickness of the mixed layer was obtained by observing a scanning electron microscope (section SEM, taken by a scanning electron microscope S-5200 manufactured by Hitachi, Ltd.) in the film thickness direction cross section of the polarizing plate protective film.

(2) Water vapor permeability (moisture permeability at 40 ° C and 90% relative humidity)

Polarizing plate protective film samples of Examples and Comparative Examples were measured by the method described in JIS Z 0208 after humidity of 70 mmφ at 40 캜 and relative humidity of 90% for 24 hours respectively.

The moisture permeability of the hard coat layer was calculated from the moisture permeability of the polarizing plate protective film and the cellulose ester base material and the moisture permeability of the cellulose ester base material and the polarizing plate protective film using the following formula (1).

The moisture permeability of the polarizing plate protective film in the steady state is denoted by J f , and the moisture permeability of the polarizing plate protective film in the normal state is denoted by J f , When the moisture permeability of the cellulose ester base material is J s , and the polarizing plate protective film is separated into the cellulose ester base material and the hard coat layer, the moisture permeability of the hard coat layer is defined as J b .

1 / J f = 1 / J s + 1 / J b (1)

Water vapor transmission rate of water vapor transmission rate J s J f and cellulose ester-based protective film of the polarizing plate may be measured directly, on the basis of their measured values can be obtained the water vapor transmission rate J b of the hard coat layer was calculated.

(3) Evaluation of pencil hardness

The pencil hardness evaluation described in JIS K 5600 was performed as an index of scratch resistance. After the polarizing plate protective film was humidified at a temperature of 25 DEG C and a humidity of 60% RH for 2 hours, the pencil for 2B to 3H test specified in JIS S 6006 was used, and the result was judged as follows under a load of 4.9 N The highest hardness at which the hardness becomes.

OK: No scratches in evaluation of n = 5 4 or more

NG: No scratches were evaluated in n = 5

(Evaluation of Liquid Crystal Display)

(1) Fabrication of liquid crystal display device

Using each of the polarizing plate protective films produced by the above-described method, a liquid crystal display was manufactured and evaluated.

<Production of Polarizer>

1) saponification of the film

A commercially available cellulose acylate film (Fujitac ZRD40, manufactured by Fuji Film), a commercially available cellulose acylate film TD60 (manufactured by Fuji Photo Film Co., Ltd.), the polarizing plate protective film samples 1 to 19 and the comparative polarizing plate Protective films Samples 1 to 5 were immersed in a 1.5 mol / l NaOH aqueous solution (saponified solution) maintained at 55 ° C for 2 minutes, and then the film was washed with water, and then 30 minutes at 30 ° C in a 0.05 mol / After the initial dipping, the film was further neutralized by passing a further water bath under 30 seconds of running water. Then, dewatering with an air knife was repeated three times, water was removed, and the mixture was allowed to stand in a drying zone at 70 캜 for 15 seconds and dried to produce a saponified film.

2) Fabrication of polarizer

According to Example 1 of Japanese Patent Application Laid-Open No. 2001-141926, iodine was adsorbed on a stretched polyvinyl alcohol film to prepare a polarizer having a thickness of 20 m.

3) Integration

(Preparation of front polarizing plate: Examples Polarizing plates 1 to 19 and Comparative Examples 1 to 5)

After the saponification, the polarizing plate protective films of Examples 1 to 19 and Comparative Polarizing Plate Protective Films Samples 1 to 5 (the surface on which the hard coat layer of the polarizing plate protective film was not laminated was placed in contact with the polarizer) And the saponified cellulose acylate film ZRD40 were sequentially stacked in this order with a PVA adhesive and then heat dried to produce Example Polarizers 1 to 19 and Comparative Polarizers 1 to 5.

At this time, in each example, the polarizer was arranged such that the longitudinal direction of the roll of the produced polarizer and the longitudinal direction of the polarizing plate protective film were parallel. In addition, the longitudinal direction of the roll of the polarizer and the longitudinal direction of the roll of the cellulose acylate film ZRD40 were arranged in parallel.

(Preparation of rear-side polarizing plate)

The saponified cellulose acylate film TD60, the stretched iodine PVA polarizer, and the saponified cellulose acylate film ZRD40 were sequentially stacked in this order with a PVA adhesive and thermally dried to obtain a rear side polarizing plate.

At this time, the longitudinal direction of the roll of the produced polarizer and the longitudinal direction of the cellulose acylate film TD60 were arranged in parallel. In addition, the longitudinal direction of the roll of the polarizer and the longitudinal direction of the roll of the cellulose acylate film ZRD40 were arranged in parallel.

<Mounting on IPS panel>

The upper and lower polarizers of the IPS mode liquid crystal cell (manufactured by LGD 42LS5600) were peeled off, and the above-mentioned polarizers 1 to 19 and comparative polarizers 1 to 5 as front polarizers were attached to the front side (viewing side) The above-mentioned polarizing plate as the side polarizing plate was pasted to the front side and the rear side with a pressure-sensitive adhesive so that the cellulose acylate film ZRD40 was on the liquid crystal cell side, respectively. Nicols were arranged such that the absorption axis of the polarizing plate on the front side was in the longitudinal direction (lateral direction) and the transmission axis of the polarizing plate on the rear side was the longitudinal direction (lateral direction). The thickness of the glass used in the liquid crystal cell was 0.5 mm.

The obtained liquid crystal display devices were the liquid crystal display devices 1 to 19 (Examples 1 to 19) and the comparative liquid crystal display devices 1 to 5 (Comparative Examples 1 to 5), respectively.

(2) Light leakage evaluation

The light leakage of the manufactured liquid crystal display device was evaluated. The results are shown in Table 1 below.

EXAMPLES The liquid crystal display devices 1 to 19 and the comparative example liquid crystal display devices 1 to 5 were thermally set at 60 DEG C and 90% relative humidity for 96 hours, left at 25 DEG C and 60% relative humidity for 2 hours, And light leakage at four corners of the panel was evaluated after 5 hours and 10 hours from the lighting.

The light leakage evaluation was conducted by taking a black display screen from the front side of the screen with a luminance measuring camera "ProMetric" (manufactured by Radiant Imaging), and based on the average brightness of the whole screen and the luminance difference at a point where light leakage at four corners is large And evaluated in five stages. In the present invention, the levels of A and B are within tolerance, and the levels of C to E are not allowed.

A: After 5 hours, light leakage at the corners of panel 4 is not visible.

   After 10 hours, light leakage at the corners of panel 4 is not visible.

B: After 5 hours, a slight light leakage is visible at one or two corners of the panel four corners.

   After 10 hours, light leakage at the corners of panel 4 is not visible.

C: After 5 hours, a slight light leakage is visible at one or two corners of the panel four corners.

   After 10 hours, a slight light leakage is visible at one or two corners of the panel four corners.

D: After 5 hours, some light leakage is visible at the corners of the panel 4 and at the corners of the corners of the panel 4.

   After 10 hours, a slight light leakage is visible at one or two corners of the panel four corners.

E: After 5 hours, some light leakage is visible at the corners of the panel 4, at the corners of the corners of the panel 4.

   After 10 hours, a slight light leakage is visible at the corners of the panel 4 and at the corners of the panel 4.

Figure pat00022

Figure pat00023

As shown in Table 1, in Examples 1 to 19, the hardness was high and the moisture permeability was low. In the liquid crystal display devices manufactured using the polarizing plate protective films of Examples 1 to 19, light leakage was small.

The present invention is applicable to an image display apparatus such as a liquid crystal display (LCD), a plasma display panel (PDP), an electroluminescence display (ELD), a cathode ray tube display (CRT)

Claims (16)

An optical film comprising a hard coat layer on a substrate,
Wherein the hard coat layer is a layer on which the photocurable composition is cured,
Wherein the photocurable composition comprises an epoxide represented by the following general formula (I), a bisphenol compound, and a photocathode polymerization initiator.
[Chemical Formula 1]
Figure pat00024
 The method according to claim 1,
Wherein the bisphenol compound is represented by the following Formula II-1,
(2)
Figure pat00025

X represents a single bond, a hydrocarbon group of 1 to 15 carbon atoms, an oxygen atom, a sulfur atom, and a sulfo group, and R &lt; 2 &gt; represents a hydrogen atom, a halogen atom, or a hydrocarbon group of 1 to 15 carbon atoms. Lt; RTI ID = 0.0 &gt; 1, &lt; / RTI &gt; The method according to claim 1,
Wherein the bisphenol compound is represented by the following general formula (II-2)
(3)
Figure pat00026

In the general formula (II-2), R 1 , R 2 , R 3 and R 4 represent hydrogen or a hydrocarbon group of 1 to 15 carbon atoms, and R 3 and R 4 may combine to form a cyclic structure. . The method according to claim 2 or 3,
Wherein R 1 and R 2 are hydrogen or a hydrocarbon group having 1 to 6 carbon atoms. 5. The method of claim 4,
Wherein R 1 is hydrogen and R 2 is a methyl group. 4. The method according to any one of claims 1 to 3,
Wherein the content of the bisphenol compound relative to the total solid content of the photocurable composition is 1 to 40%. 4. The method according to any one of claims 1 to 3,
Wherein the substrate is a cellulose ester substrate. 4. The method according to any one of claims 1 to 3,
An optical film that is a polarizer protective film. A polarizer comprising a polarizer and an optical film according to claim 8 on at least one surface of the polarizer. A liquid crystal display device comprising a pair of polarizing plates and a liquid crystal cell sandwiched between the pair of polarizing plates, wherein at least one of the pair of polarizing plates is the polarizing plate according to claim 9. A method for producing an optical film comprising a hard coat layer on a substrate,
A photocurable composition comprising an epoxide represented by the following general formula (I), a bisphenol compound and a photocathode polymerization initiator is coated on the base material to form a coating film,
Irradiating the coating film with light to cure the coating film to form the hard coat layer.
[Chemical Formula 1]
Figure pat00027
 12. The method of claim 11,
Wherein the bisphenol compound is represented by the following Formula II-1,
(2)
Figure pat00028

X represents a single bond, a hydrocarbon group of 1 to 15 carbon atoms, an oxygen atom, a sulfur atom, and a sulfo group, and R &lt; 2 &gt; represents a hydrogen atom, a halogen atom, or a hydrocarbon group of 1 to 15 carbon atoms. And a divalent linking group composed of at least one species selected from the group consisting of an alkyl group and an aryl group. 13. The method of claim 12,
Wherein the bisphenol compound is represented by the following general formula (II-2)
(3)
Figure pat00029

In the general formula (II-2), R 1 , R 2 , R 3 and R 4 represent hydrogen or a hydrocarbon group of 1 to 15 carbon atoms, and R 3 and R 4 may combine to form a cyclic structure. &Lt; / RTI &gt; 14. The method according to any one of claims 11 to 13,
Wherein the light irradiating the coating film is ultraviolet light. 14. The method according to any one of claims 11 to 13,
Wherein the irradiation of the light is performed in a state where the substrate on which the coating film is formed is heated. 14. The method according to any one of claims 11 to 13,
Wherein the hard coat layer is formed without heating after irradiating the light.
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Family Cites Families (7)

* Cited by examiner, † Cited by third party
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JP4245377B2 (en) * 2003-03-07 2009-03-25 株式会社Ａｄｅｋａ High elastic epoxy resin composition
JP2010253767A (en) * 2009-04-23 2010-11-11 Mitsubishi Rayon Co Ltd Hard coat molded article and method of manufacturing the same, and active energy ray curable coating composition
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