JP2010079100A - Glare-proof film, polarizing plate and image display apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a glare-proof film which has high antistatic property, can suppress reflectance and is inexpensive, to provide a polarizing plate using the glare-proof film, and to provide an image display apparatus which is fabricated by using the polarizing plate, is excellent in prevention of dust sticking and has satisfactory visibility. <P>SOLUTION: The glare-proof film includes: a transparent plastic film base; a glare-proof layer which is disposed on the transparent plastic film base and has a surface formed of fine ruggedness; and an antistatic layer disposed on the uppermost surface of the glare-proof layer, wherein the antistatic layer is made of a curable composition containing following components (A), (B), and (C). Therein, (A) is conductive fine particle of which the average particle size is 1 to 150 nm, (B) is ionizing radiation curable monomer and (C) is organic polymer thickener. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an antiglare film, a polarizing plate having an antiglare film, and an image display device.

  Antiglare films with an antiglare hard coat layer laminated on a transparent plastic film substrate are like liquid crystal display devices (LCD), plasma display panels (PDP), electroluminescence displays (ELD), and cathode ray tube display devices (CRT). In various liquid crystal display devices, the liquid crystal display device is disposed on the surface of the display in order to prevent a decrease in contrast due to reflection of external light or reflection of an image due to surface scattering.

  In recent years, with the price reduction of liquid crystal televisions and the like, image display devices equipped with such an antiglare film have been widely used. In connection with this, the scene where the anti-glare film mounted is exposed to various environments with an image display apparatus is increasing. In particular, it is handled like a CRT television whose surface is glass, and there is an increased risk of scratching the surface of the liquid crystal display device. Therefore, the antiglare film disposed on the outermost surface of the liquid crystal display device is required to have high physical strength (such as scratch resistance) in addition to the high visibility improving effect that has been conventionally required.

  In order to obtain high physical strength, a technique of polymerizing an acrylic polyfunctional compound on the article surface and providing a hard coat layer is performed. The hard coat layer thus obtained has high surface hardness, glossiness, transparency, and scratch resistance, which are properties unique to acrylic resins. On the other hand, it is easy to be charged because of its excellent insulating properties, and it is a problem that it becomes dirty due to dirt and dust adhering to the surface of the product provided with a hard coat layer, and when charged in a precision machine, I had a problem that occurred.

  In order to solve these problems, a conductive layer is very thin enough not to drop the surface hardness between the base material and the hard coat layer or between the hard coat layer and the low refractive index layer. There is a method of providing Moreover, the coating method is used as the formation method, and the improvement of productivity is aimed at.

  Examples of the conductive agent used include metal oxide fine particles, conductive polymers, various activators, hydrophilic compounds, and ionic conductive compounds. Among them, the method using various active agents, hydrophilic compounds, and ion conductive compounds (see, for example, Patent Document 1) has a problem of high humidity dependency because ion conduction is performed using moisture in the outside air as a medium. .

  On the other hand, in the technique using electron conductive fine particles, a hard coat kneading method and a method of providing a conductive layer between layers are used. In the kneading method (see, for example, Patent Document 2), the refractive index of fine particles is usually high, and the amount of fine particles is determined because of electronic conductivity, thereby reducing light interference with the substrate. It becomes difficult to achieve both conductivity. If the blending amount is too small, conductivity will not be exhibited, and if it is too large, there will be a problem that the light transmittance will decrease, and if the film thickness is reduced to increase the transmittance, the function of protecting the substrate will decrease. There is a problem. Further, when the antireflection layer is formed in order to reduce the reflectance on the upper layer of the hard coat layer, there is a problem that the antistatic performance is lowered. Conductive polymers have similar problems. In the method of providing a conductive layer between the base material and the hard coat layer (for example, see Patent Document 3), it is necessary to perform a special treatment on the upper layer in consideration of conductivity by laminating it on the upper layer of the conductive layer. In addition, the multi-layer structure causes a problem that the number of processes increases and the productivity decreases. Similarly, a method in which a conductive layer is provided between a hard coat layer and an antireflection layer (see, for example, Patent Document 4) has a problem that the number of processes increases and productivity decreases due to the multilayer structure.

  In addition, an antireflection laminated film having high conductivity and antireflection properties has been disclosed (for example, see Patent Document 5). However, the hard coat layer surface is smooth and an antiglare property is imparted. When the surface has fine irregularities, there is a problem that the conductivity and the antireflection function are lowered.

JP 2002-40209 A JP-A-11-92750 JP-A-11-326602 JP 2001-330702 A JP 2006-178276 A

  The present invention has been made to solve the above-described problems, and has an object to provide an anti-glare film that does not increase the antistatic property and reflectivity particularly at a low cost. It is an object of the present invention to provide a polarizing plate using a dazzling film and an image display device that is excellent in preventing dust adhesion and having good visibility by using the polarizing plate.

As a result of intensive studies, the present inventors have found that the above problem can be solved by laminating a specific antistatic layer on the antiglare property.
That is, the present inventors achieved the above object with the following configurations.
1. On a transparent plastic film substrate, it has an antiglare layer having fine irregularities on the surface, and an antistatic layer on the outermost surface of the antiglare layer, and the antistatic layer comprises the following (A), The anti-glare film formed from the curable composition containing (B) and (C) component.
(A) Conductive fine particles having an average particle diameter of 1 to 150 nm (B) Ionizing radiation curable monomer (C) Organic polymer thickener 2. The average inclination angle θa of the surface of the antiglare layer is 0.1 degree or more 5 2. The antiglare film as described in 1 above, which is 0 ° or less.
3. The antiglare film as described in 1 or 2 above, wherein the antistatic layer contains substantially no insulating polymer binder component.
4. The antiglare film according to any one of 1 to 3 above, wherein a refractive index of the antistatic layer is lower than a refractive index of the antiglare layer.
5. Any one of the above 1 to 4, wherein the antistatic layer is a cured product of a composition containing the following component (D) in addition to the components (A), (B), and (C): The antiglare film as described.
(D) Inorganic fine particles mainly composed of silicon oxide having an average particle diameter of 1 to 300 nm 6. The ionizing radiation curable monomer of component (B) in the composition contains fluorine. The antiglare film according to any one of the above.
7. The antiglare film as described in any one of 1 to 6 above, wherein the organic polymer thickener as the component (C) in the composition is a cellulose ester.
8. The antiglare film according to any one of 5 to 7 above, wherein at least one of the component (A) and the component (D) in the composition is porous or fine particles having a cavity inside.
9. The antiglare film as described in any one of 1 to 8 above, wherein the antiglare layer contains at least one kind of translucent particles.
10. A polarizing plate having the antiglare film according to any one of 1 to 9 described above on at least one of a protective film of a polarizing film.
11. An image display device having the antiglare film according to any one of 1 to 9 or the polarizing plate according to 10 above on an image display surface.

  According to the present invention, the antistatic layer is a cured product of a composition containing conductive fine particles, an ionizing radiation curable monomer and an organic polymer thickener, and the organic polymer thickener is contained. Since the antistatic layer can be formed following the fine irregular shape of the antiglare layer, it is possible to prevent the surface of the antiglare film from being flattened by forming the antistatic layer on the antiglare layer. An antiglare film having excellent dazzling properties can be provided.

  Hereinafter, the present invention will be described in more detail. In the present specification, when a numerical value represents a physical property value, a characteristic value, etc., the description “(numerical value 1) to (numerical value 2)” means “(numerical value 1) or more and (numerical value 2) or less”. . In the present specification, the description “(meth) acrylate” means “at least one of acrylate and methacrylate”. The same applies to “(meth) acrylic acid” and the like.

The antiglare film of the present invention has an antiglare layer having fine irregularities on the surface on a transparent plastic film substrate, and has an antistatic layer on the outermost surface of the antiglare layer, and the antistatic layer Is an antiglare film formed from a curable composition containing the following components (A), (B), and (C).
(A) Conductive fine particles having an average particle diameter of 1-150 nm (B) Ionizing radiation curable monomer (C) Organic polymer thickener

<Layer structure of antiglare film>
The layer structure of the antiglare film of the present invention has at least one antiglare layer and an antistatic layer on the outermost surface. The antiglare layer may have a multilayer structure. Further, another functional layer may be laminated between the base film and the antiglare layer and / or between the antiglare layer and the antistatic layer. Examples of other functional layers include a hard coat layer and an interference unevenness preventing layer. The antistatic layer may also function as another layer. Examples of these layers include a low refractive index layer, an antifouling layer, and scratch resistance.

  In the present invention, it is preferable that the antistatic layer also serves as the low refractive index layer from the viewpoint of low reflectance, and the refractive index of the antistatic layer is preferably lower than the refractive index of the antiglare layer. In this case, a configuration including a high refractive index layer, or a medium refractive index layer and a high refractive index layer between the antistatic layer and the antiglare layer is also a preferred embodiment.

The example of the preferable layer structure of the anti-glare film of this invention is shown below. In the following configuration, the base film refers to a support composed of a film.
・ Base film / Anti-glare layer / Antistatic layer ・ Base film / Anti-glare layer / Anti-static layer (also serves as a low refractive index layer)
・ Base film / Anti-glare layer / Abrasion resistant layer / Antistatic layer ・ Base film / Hard coat layer / Anti-glare layer / Anti-static layer ・ Base film / Hard coat layer / Anti-glare layer / Abrasion resistant layer / Antistatic layer -Base film / Anti-glare layer / High refractive index layer / Antistatic layer -Base film / Anti-glare layer / Medium refractive index layer / High refractive index layer / Antistatic layer Antistatic layer / Base material Film / antiglare layer / medium refractive index layer / high refractive index layer / antistatic layer Antistatic layer / base film / antiglare layer / high refractive index layer / low refractive index layer / high refractive index layer / antistatic layer

<Antistatic layer>
The average film thickness of the antistatic layer is 0.03 μm to 0.5 μm, more preferably 0.05 μm to 0.3 μm, and most preferably 0.07 μm to 0.2 μm. By making the film thickness of the antistatic layer within this range, sufficient antistatic can be obtained while preventing wind unevenness.

  The refractive index of the antistatic layer is preferably from 1.36 to 1.56, more preferably from 1.40 to 1.52, still more preferably from 1.42 to 1.52. It is particularly preferably 45 to 1.51. By setting the refractive index of the antistatic layer within this range, it can also function as a low reflectance layer, the reflectance can be suppressed, and reflection of external light can be further suppressed. Further, by limiting the lower limit to this range, scratches are not noticeable even when the antistatic layer is peeled off.

  While the refractive index of the antistatic layer is in the above range, the difference from the refractive index of the adjacent lower layer is preferably 0.02 to 0.10. When there is a difference in refractive index, the reflectance of the surface as an antireflection layer can be further suppressed by utilizing the light interference effect by setting the film thickness of the antistatic layer to 0.08 μm to 0.12 μm. Further, by suppressing the upper limit of the refractive index difference within this range, it is difficult to stand out even when the antistatic layer is peeled off.

<Conductive fine particles of antistatic layer>
As the conductive fine particles, inorganic fine particles such as antimony pentoxide, tin oxide, zinc oxide, ITO (indium tin oxide) and ATO (antimony tin oxide), and organic fine particles such as polypyrrole, polyaniline, polythiophene and polyfluorene are used. be able to. These fine particles can be used alone or in combination of two or more kinds of mixed fine particles, or these two or more kinds of composite fine particles can be used.

  The composite fine particles may be fine particles having a core-shell structure. Specifically, it has metal compound fine particles with a low refractive index in the core part. By using a crystalline film having conductivity as the shell portion, conductive fine particles having a low refractive index are obtained. Examples of the metal compound fine particles having a low refractive index include metal compounds such as silica and magnesium fluoride, and examples of the material for the crystalline film having conductivity include antimony pentoxide, tin oxide, zinc oxide, and ITO (indium). Tin oxide) and ATO (antimony tin oxide).

The shape of the conductive fine particles is spherical, hollow, porous, rod-like, plate-like, fiber-like, or indefinite, preferably spherical, porous, or hollow. In order to lower the refractive index of the antistatic layer, it is also preferable to use porous or hollow fine particles. The specific surface area of the conductive fine particles (by the BET specific surface area measurement method using nitrogen) is preferably 10 to 1000 m ² / g, more preferably 30 to 150 m ² / g, and most preferably 50 to 100 m ^2. / G. The average particle size of the conductive fine particles is 1 to 150 nm, and more preferably 5 to 10 nm.

In addition, the conductive fine particles are preferable because a shell can be formed with a conductive component on the surface of non-conductive inorganic fine particles such as silica particles to impart conductivity. Particularly preferred is a combination using silica-based porous or hollow particles as the core particles and ZnO ₂ , Y ₂ O ₃ , Sb ₂ O ₅ , ATO, ITO, SnO ₂ as the shell. Hereinafter, particularly preferred antimony oxide-coated silica-based fine particles will be described.

  In the antimony oxide-coated silica-based fine particles according to the present invention, porous silica-based fine particles or silica-based fine particles having cavities therein are coated with an antimony oxide coating layer. The porous silica-based fine particles include porous silica fine particles and composite oxide fine particles mainly composed of silica. The surface of the porous inorganic fine particles disclosed in JP-A-7-133105 is silica or the like. The nanometer-sized composite oxide fine particles having a low refractive index and coated with can be suitably used.

  The silica-based fine particles having cavities therein are composed of inorganic oxides other than silica and silica, disclosed in JP-A-2001-233611, and low-refractive-index nanometer-sized silica-based particles having cavities inside. Fine particles can also be suitably used.

  Such porous silica-based fine particles or silica-based fine particles having cavities therein preferably have an average particle diameter in the range of 4 to 120 nm, more preferably 10 to 90 nm. If the average particle diameter is 4 nm or more, the obtained particles have sufficient stability, and there is a problem that monodispersed antimony oxide-coated silica-based fine particles that cannot occur when small-sized particles are used cannot be obtained. Does not occur. If the average particle size is 120 nm or less, the average particle size of the obtained antimony oxide-coated silica-based fine particles can be suppressed to 150 nm or less, and when a transparent coating is formed using large-sized antimony oxide-coated silica-based fine particles. It is preferable because it can suppress a possible decrease in transparency and an increase in haze.

  The refractive index of the porous silica-based fine particles or the silica-based fine particles having cavities therein is preferably 1.45 or less, more preferably 1.40 or less, which is the refractive index of silica.

  The silica-based fine particles are preferably coated with antimony oxide having an average coating layer thickness of 0.5 to 30 nm, preferably 1 to 10 nm. If the average thickness of the coating layer is 0.5 nm or more, it is preferable because the silica-based fine particles can be completely coated, and the resulting antimony oxide-coated silica-based fine particles have sufficient conductivity. If the thickness of the coating layer is 30 nm or less, the effect of improving the conductivity can be sufficiently obtained, and the shortage of the refractive index when the average particle diameter of the antimony oxide-coated silica-based fine particles is small can be suppressed.

  The antimony oxide-coated silica-based fine particles according to the present invention preferably have an average particle size in the range of 5 to 150 nm, more preferably 10 to 100 nm. If the average particle diameter of the antimony oxide-coated silica-based fine particles is 5 nm or more, aggregated particles in the obtained particles can be suppressed, which is preferable. In addition, it can occur with small particles, and when used for forming a transparent film due to insufficient dispersibility, transparency, haze, film strength, adhesion to a substrate, etc. do not become insufficient. ,preferable. If the average particle diameter of the antimony oxide-coated silica-based fine particles is 150 nm or less, the formed transparent film is preferable because the transparency is sufficient and the haze is kept low. Further, the adhesion with the base material does not become insufficient.

  The refractive index of the antimony oxide-coated silica-based fine particles is preferably in the range of 1.25 to 1.60, more preferably 1.30 to 1.50. A refractive index of 1.25 or more is preferable for particle production, and the strength of the obtained particles is not insufficient. On the other hand, if the refractive index is 1.60 or less, the antireflection performance of the transparent coating film is sufficient and preferable.

  The volume resistance value of the antimony oxide-coated silica-based fine particles is preferably in the range of 10 to 5000 Ω / cm, more preferably 10 to 2000 Ω / cm. If the volume resistance value is 10 Ω / cm or more, the particles can be obtained without problems during production, which is preferable. Moreover, the refractive index of the obtained particle | grain becomes 1.6 or less, and the anti-reflective performance of a transparent film is sufficient, and it is preferable. On the other hand, if the volume resistance value is 5000 Ω / cm or less, the antistatic performance of the obtained transparent film is sufficient, which is preferable. The antimony oxide-coated silica-based fine particles of the present invention can be used after surface treatment with a silane coupling agent according to a conventional method, if necessary.

  The addition amount of the conductive fine particles is not particularly limited, but is 10 to 80% by mass with respect to the mass of the antistatic layer (corresponding to the solid content of the antistatic layer forming composition) in terms of antistatic properties and refractive index adjustment. Is preferable, and a range of 30 to 70% by mass is particularly preferable. In order to improve the dispersibility of the conductive fine particles in the matrix, a dispersant can be used in the matrix. There is no restriction | limiting in particular as a dispersing agent.

  In addition, by using conductive fine particles having a particle diameter of 150 nm or less, it is possible to form a conductive layer that exhibits high conductivity and has low transmittance and no coloring of the layer. If the particle size exceeds 150 nm, light is remarkably reflected by Rayleigh scattering, the film becomes white and a decrease in transparency is observed, and if it is less than 2 nm, the formation of fine particles is difficult, or the conductivity is deteriorated, In addition, problems such as film non-uniformity due to aggregation between particles occur.

<Binder>
Insulating polymer binder component In the present invention, the antistatic layer is an insulating polymer binder component (mass average molecular weight of 5000 or more) as a component other than the components (A), (B), and (C). It is preferable not to contain substantially. This is to keep the insulating binder component that prevents the aggregation of the conductive fine particles to the minimum necessary, and to suppress the decrease in conductivity and hardness of the antistatic layer due to the insulating binder component.
The insulating binder is not particularly limited, but the volume resistance value is 5000 Ω / cm or more, and examples thereof include a fluorine-containing copolymer compound.

  Fluorinated vinyl monomers (used as precursors of fluorinated copolymer compounds) include fluoroolefins (eg, fluoroethylene, vinylidene fluoride, tetrafluoroethylene, hexafluoropropylene), (meth) acrylic acid moieties or Examples thereof include fully fluorinated alkyl ester derivatives (for example, Biscoat 6FM (trade name, manufactured by Osaka Organic Chemical Co., Ltd.) and R-2020 (trade name, manufactured by Daikin), fully or partially fluorinated vinyl ethers, and the like.

  For the purpose of imparting crosslinking reactivity to the fluorine-containing vinyl monomer, a copolymer with the units represented by the following (A1), (B1), and (C1) may be mentioned.

(A1): a structural unit obtained by polymerization of a monomer having a self-crosslinkable functional group in the molecule in advance such as glycidyl (meth) acrylate or glycidyl vinyl ether,
(B1): Monomer having a carboxyl group, hydroxy group, amino group, sulfo group or the like (for example, (meth) acrylic acid, methylol (meth) acrylate, hydroxyalkyl (meth) acrylate, allyl acrylate, hydroxyethyl vinyl ether, hydroxybutyl vinyl ether , Maleic acid, crotonic acid, etc.)
(C1): In the molecule, a group that reacts with the functional group of (A1) or (B1) above and a compound having a crosslinkable functional group separately from the structural unit of (A1) or (B1) Examples of the structural unit to be obtained (for example, a structural unit that can be synthesized by a technique such as allowing acrylic acid chloride to act on a hydroxyl group).

  Specifically, JP 2002-243907, JP 2002-372601, JP 2003-26732, JP 2003-222702, JP 2003-294911, JP 2003-329804, JP 2004. -4444 and JP-A-2004-45462.

  The phrase “substantially containing no insulating polymer binder component” allows the inclusion of a polymer component that does not lower the conductivity. The proportion of the insulating polymer component in the antistatic layer is preferably 5% or more and 10% or less, and more preferably 2% or more and 5% or less in all binders forming the antistatic layer.

(B) Ionizing radiation curable monomer In the present invention, the binder of the antistatic layer is formed by the ionizing radiation curable monomer which is the component (B), and is formed by a crosslinking reaction or polymerization reaction of the curable compound by ionizing radiation. Is done. That is, a binder can be formed by applying a curable polyfunctional monomer having a polymerizable functional group onto a transparent substrate film and causing the polyfunctional monomer to undergo a crosslinking reaction or a polymerization reaction. Examples of the polymerizable functional group include unsaturated polymerizable functional groups such as a (meth) acryloyl group, a vinyl group, a styryl group, and an allyl group, and among them, a (meth) acryloyl group is preferable.

  Specific examples of the polyfunctional monomer having a polymerizable functional group include (meth) acrylic acid diesters of alkylene glycol such as neopentyl glycol acrylate, 1,6-hexanediol (meth) acrylate, and propylene glycol di (meth) acrylate. ; (Meth) acrylic acid diesters of polyoxyalkylene glycols such as triethylene glycol di (meth) acrylate, dipropylene glycol di (meth) acrylate, polyethylene glycol di (meth) acrylate, polypropylene glycol di (meth) acrylate; penta (Meth) acrylic acid diesters of polyhydric alcohols such as erythritol di (meth) acrylate; 2,2-bis {4- (acryloxy-diethoxy) phenyl} propane, 2-2-bis {4- ( Kurirokishi · polypropoxy) phenyl} ethylene or propylene oxide adduct (meth) acrylic acid diesters such as propane; and the like.

  Furthermore, epoxy (meth) acrylates, urethane (meth) acrylates, and polyester (meth) acrylates are also preferably used as the photopolymerizable polyfunctional monomer.

Among the above, esters of polyhydric alcohol and (meth) acrylic acid are preferable, and polyfunctional monomers having three or more (meth) acryloyl groups in one molecule are more preferable.
Specifically, trimethylolpropane tri (meth) acrylate, trimethylolethane tri (meth) acrylate, 1,2,4-cyclohexanetetra (meth) acrylate, pentaglycerol triacrylate, pentaerythritol tetra (meth) acrylate, penta Erythritol tri (meth) acrylate, (di) pentaerythritol triacrylate, (di) pentaerythritol pentaacrylate, (di) pentaerythritol tetra (meth) acrylate, (di) pentaerythritol hexa (meth) acrylate, tripentaerythritol triacrylate , Tripentaerythritol hexatriacrylate and the like.

Two or more polyfunctional monomers may be used in combination.
Moreover, it is preferable to contain fluorine for the purpose of reducing the refractive index of the antistatic layer. For the purpose of imparting antifouling properties, a compound into which a perfluoroalkyl group, a perfluoroethylene oxide group, an alkyl group, or the like is introduced can be used.
Polymerization of the monomer having an ethylenically unsaturated group can be performed by irradiation with ionizing radiation in the presence of a photo radical initiator. As the photopolymerization initiator, a photoradical polymerization initiator and a photocationic polymerization initiator are preferable, and a photoradical polymerization initiator is particularly preferable.

Moreover, it is preferable that the ionizing radiation-curable monomer which is (B) component contains a fluorine.
Specific examples of the compound include compounds described in paragraphs [0054] to [0079] of JP-A-2008-134585, compounds described in paragraphs [0008] to [0017] of JP-A-3890022, and JP-A-11 And the compounds described in paragraph Nos. [0011] to [0013] of JP-A-80312.

<Photopolymerization initiator>
Examples of the photo radical polymerization initiator include acetophenones, benzoins, benzophenones, phosphine oxides, ketals, anthraquinones, thioxanthones, azo compounds, peroxides (JP-A No. 2001-139663, etc.), 2 , 3-dialkyldione compounds, disulfide compounds, fluoroamine compounds, aromatic sulfoniums, lophine dimers, onium salts, borate salts, active esters, active halogens, inorganic complexes, coumarins and the like.
Examples of the acetophenones include 2,2-dimethoxyacetophenone, 2,2-diethoxyacetophenone, p-dimethylacetophenone, 1-hydroxy-dimethylphenylketone, 1-hydroxy-dimethyl-p-isopropylphenylketone, 1- Hydroxycyclohexyl phenyl ketone, 2-methyl-4-methylthio-2-morpholinopropiophenone, 2-benzyl-2-dimethylamino-1- (4-morpholinophenyl) -butanone, 4-phenoxydichloroacetophenone, 4-t -Butyl-dichloroacetophenone.

Examples of the benzoins include benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzyl dimethyl ketal, benzoin benzene sulfonate, benzoin toluene sulfonate, benzoin methyl ether, benzoin ethyl ether and benzoin isopropyl ether. included.
Examples of benzophenones include benzophenone, hydroxybenzophenone, 4-benzoyl-4'-methyldiphenyl sulfide, 2,4-dichlorobenzophenone, 4,4-dichlorobenzophenone and p-chlorobenzophenone, 4,4'-dimethylaminobenzophenone (Michler ketone), 3,3 ′, 4,4′-tetra (t-butylperoxycarbonyl) benzophenone and the like are included.

Examples of the borate salt are described in Japanese Patent Nos. 2764769 and 2002-116539, and in Kunz, Martin “Rad Tech'98. Proceeding April 19-22, 1998, Chicago”. Organic borates. Examples thereof include compounds described in paragraph numbers [0022] to [0027] of JP-A-2002-116539.
Other organic boron compounds include JP-A-6-348011, JP-A-7-128785, JP-A-7-140589, JP-A-7-306527, and JP-A-7-292014. Specific examples thereof include organoboron transition metal coordination complexes such as ionic complexes with cationic dyes.

Examples of the phosphine oxides include 2,4,6-trimethylbenzoyldiphenylphosphine oxide.
Examples of the active esters include 1,2-octanedione, 1- [4- (phenylthio)-, 2- (O-benzoyloxime)], sulfonic acid esters, cyclic active ester compounds, and the like.
Specifically, Examples 1 to 21 described in JP-A No. 2000-80068 are particularly preferable.
Examples of onium salts include aromatic diazonium salts, aromatic iodonium salts, and aromatic sulfonium salts.

Specific examples of the active halogens include “Bull Chem. Soc Japan”, 42, 2924 (1969), U.S. Pat. No. 3,905,815, and JP-A-5-27830. Publication, M.M. P. Examples include compounds described in Hutt “Journal of Heterocyclic Chemistry”, Vol. 1 (No. 3), (1970), and in particular, oxazole compounds substituted with a trihalomethyl group: s-triazine compounds.
More preferable examples include s-triazine derivatives in which at least one mono, di, or trihalogen-substituted methyl group is bonded to the s-triazine ring.
These initiators may be used alone or in combination.

  Commercially available photo radical polymerization initiators include KAYACURE (DETX-S, BP-100, BDK, CTX, BMS, 2-EAQ, ABQ, CPTX, EPD, ITX, QTX, BTC, manufactured by Nippon Kayaku Co., Ltd. MCA, etc.), Irgacure (651, 184, 500, 819, 907, 369, 1173, 1870, 2959, 4265, 4263, etc.) manufactured by Ciba Specialty Chemicals, Esacure (KIP100F, KB1, EB3, BP, X33, KT046, KT37, KIP150, TZT) and the like and combinations thereof are preferable examples.

  The photopolymerization initiator is preferably used in the range of 0.1 to 15 parts by mass, and more preferably in the range of 1 to 10 parts by mass with respect to 100 parts by mass of the polyfunctional monomer.

<Photosensitizer>
In addition to the photopolymerization initiator, a photosensitizer may be used. Specific examples of the photosensitizer include n-butylamine, triethylamine, tri-n-butylphosphine, Michler's ketone and thioxanthone.
Further, one or more auxiliary agents such as an azide compound, a thiourea compound, and a mercapto compound may be used in combination.
Examples of commercially available photosensitizers include KAYACURE (DMBI, EPA) manufactured by Nippon Kayaku Co., Ltd.

  The binder content of the curable compound, photopolymerization initiator, and photosensitizer is 10 to 80% by mass relative to the mass of the antistatic layer (corresponding to the solid content of the antistatic layer forming composition). It is preferably 30 to 80% by mass, more preferably 40 to 80% by mass, and particularly preferably 50 to 80% by mass.

<Organic polymer thickener>
The curable composition for forming an antistatic layer of the present invention (hereinafter sometimes referred to as the curable composition of the present invention) includes an organic polymer thickener as component (C). A thickener means what increases the viscosity of a liquid by adding it. A thickener is added in order to form the antistatic layer laminated | stacked following the fine uneven | corrugated shape of an anti-glare layer. The magnitude of the increase in the viscosity of the curable composition (coating liquid) is preferably 0.05 to 50 cP, more preferably 0.10 to 20 cP, and most preferably 0.10 to 10 cP.

  In the curable composition of the present invention, an organic polymer thickener is used. The following are mentioned as an example of an organic polymer thickener.

Poly-ε-caprolactone poly-ε-caprolactone diol poly-ε-caprolactone triol polyvinyl acetate poly (ethylene adipate)
Poly (1,4-butylene adipate)
Poly (1,4-butylene glutarate)
Poly (1,4-butylene succinate)
Poly (1,4-butylene terephthalate)
polyethylene terephthalate)
Poly (2-methyl-1,3-propylene adipate)
Poly (2-methyl-1,3-propylene glutarate)
Poly (neopentyl glycol adipate)
Poly (neopentyl glycol sebacate)
Poly (1,3-propylene adipate)
Poly (1,3-propylene glutarate)
Polyvinyl butyral Polyvinyl formal Polyvinyl acetal Polyvinyl propanal Polyvinyl hexanal Polyvinyl pyrrolidone Polyacrylic acid ester Polymethacrylic acid ester Cellulose acetate Cellulose propionate Cellulose acetate butyrate

  Among organic polymer thickeners, cellulose acetates such as cellulose acetate, cellulose propionate, and cellulose acetate butyrate have the effect of preventing the aggregation of silicon oxide fine particles in addition to the thickening effect of the coating solution. It is preferable. Of these, cellulose acetate butyrate is particularly preferable.

  The molecular weight of the organic polymer thickener is preferably from 30,000 to 400,000 in terms of number average molecular weight, more preferably from 4,000 to 300,000, and particularly preferably from 50,000 to 200,000.

  The addition amount of the organic polymer thickener is preferably 0.5 to 10% by mass, and preferably 1.0 to 7.0% with respect to the mass of the antistatic layer (corresponding to the solid content of the antistatic layer forming composition). Is more preferable, and 2.0 to 5.0 mass% is particularly preferable.

<Inorganic fine particles mainly composed of silicon oxide of antistatic layer>
The antistatic layer of the present invention preferably contains inorganic fine particles mainly composed of silicon oxide having an average particle diameter of 1 to 300 nm as component (D). In the present invention, inorganic fine particles mainly composed of silicon oxide mean inorganic fine particles containing 50% by mass or more of silicon oxide. It is preferable to contain 70 mass% or more of silicon oxide, and it is especially preferable to contain 90 mass% or more.
The content of the inorganic fine particles is preferably 5 to 80% by mass, more preferably 10 to 70% by mass, and particularly preferably 20 to 50% by mass per antistatic solid content.

  The inorganic fine particles of the present invention can be used by modifying the surface and dispersing them in an organic solvent. From the viewpoint of compatibility with other components and dispersibility, the dispersion medium is preferably an organic solvent, for example, alcohols such as methanol, ethanol, isopropanol, butanol, and octanol; acetone, methyl ethyl ketone, methyl isobutyl ketone, and cyclohexanone. Ketones such as ethyl acetate, butyl acetate, ethyl lactate, γ-butyrolactone, esters such as propylene glycol monomethyl ether acetate and propylene glycol monoethyl ether acetate; ethers such as ethylene glycol monomethyl ether and diethylene glycol monobutyl ether; benzene, Aromatic hydrocarbons such as toluene and xylene; and amides such as dimethylformamide, dimethylacetamide, and N-methylpyrrolidone. Of these, methanol, isopropanol, butanol, methyl ethyl ketone, methyl isobutyl ketone, ethyl acetate, butyl acetate, toluene and xylene are preferred.

The number average particle diameter of the inorganic fine particles of the present invention is 1 nm to 300 nm, preferably 3 nm to 150 nm, and most preferably 10 nm to 100 nm. By setting it as the above range, it is possible to achieve both antistatic and black tightening. The number average particle diameter can be determined as an average of 500 particles in terms of a sphere equivalent by observing inorganic fine particles with a transmission electron microscope.
Various surfactants and amines may be added to improve the dispersibility of the particles.

  Examples of products that are commercially available as silicon oxide fine particle dispersions (for example, silica particles) include colloidal silica, methanol silica sol manufactured by Nissan Chemical Industries, Ltd., MA-ST-MS, IPA-ST, IPA- ST-MS, IPA-ST-L, IPA-ST-ZL, IPA-ST-UP, EG-ST, NPC-ST-30, MEK-ST, MEK-ST-L, MIBK-ST, NBA-ST, XBA-ST, DMAC-ST, ST-UP, ST-OUP, ST-20, ST-40, ST-C, ST-N, ST-O, ST-50, ST-OL, etc. ) Hollow silica and the like. As the powdered silica, Aerosil 130, Aerosil 300, Aerosil 380, Aerosil TT600, Aerosil OX50, Silex H31, H32, H51, H52, H121, H122, Asahi Glass Co., Ltd., Nippon Silica Industry, Nippon Aerosil Co., Ltd. Examples include E220A and E220 manufactured by Fuji Electric, SYLYSIA470 manufactured by Fuji Silysia Co., Ltd., SG flake manufactured by Nippon Sheet Glass Co., Ltd., and the like.

The inorganic fine particles have a spherical shape, a hollow shape, a porous shape, a rod shape, a plate shape, a fiber shape, or an indefinite shape, preferably a spherical shape, a porous shape, or a hollow shape. In order to lower the refractive index of the antistatic layer, it is also preferable to use porous or hollow silica fine particles. The specific surface area of the inorganic fine particles (by the BET specific surface area measurement method using nitrogen) is preferably 10 to 1000 m ² / g, more preferably 30 to 150 m ² / g, and most preferably 50 to 100 m ² / g. g.

  In the present invention, at least one of (A) conductive fine particles having an average particle diameter of 1 to 150 nm and (D) inorganic fine particles mainly composed of silicon oxide having an average particle diameter of 1 to 300 nm is porous or internally. Fine particles having cavities are preferred.

<Anti-fouling agent>
It is also a preferred aspect that the antistatic layer of the present invention has antifouling properties in addition to the scratch preventing effect. Such a function can be added by adding a polysiloxane-based or fluorine-based antifouling agent to the composition for forming an antistatic layer. Among these, in the present invention, a polysiloxane antifouling agent is preferable, and a silicon antifouling agent having an unsaturated double bond group is particularly preferable.
The addition amount of the antifouling agent is preferably 0.01 to 20% by mass, more preferably 0.05 to 10% by mass, and particularly preferably 0.1 to 5% by mass based on the total solid content of the antistatic layer.

  Examples of the polysiloxane antifouling agent having an unsaturated double bond group include a monomer having a siloxane group by a reaction such as polydimethylsiloxane and (meth) acrylic acid. Specific examples of the terminal (meth) acrylate siloxane compound include X-22-164A, X-22-164B, X-22-164C, X-22-2404, X-22-174D, X-22-8201, And X-22-2426 (manufactured by Shin-Etsu Chemical Co., Ltd.).

<Organic solvent for antistatic layer>
The composition for forming an antistatic layer preferably contains an organic solvent. From the viewpoint of compatibility with other components and dispersibility, for example, alcohols such as methanol, ethanol, isopropanol, butanol and octanol; ketones such as acetone, methyl ethyl ketone, methyl isobutyl ketone and cyclohexanone; ethyl acetate, butyl acetate, Esters such as ethyl lactate, γ-butyrolactone, propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate; ethers such as ethylene glycol monomethyl ether and diethylene glycol monobutyl ether; aromatic hydrocarbons such as benzene, toluene and xylene; Examples include amides such as dimethylformamide, dimethylacetamide, and N-methylpyrrolidone. Of these, methanol, isopropanol, butanol, methyl ethyl ketone, methyl isobutyl ketone, ethyl acetate, butyl acetate, toluene and xylene are preferred.

  The solid content concentration of the antistatic layer forming composition is preferably 0.5 to 30% by mass, more preferably 1 to 20% by mass, and particularly preferably 2 to 10% by mass.

<Configuration of antiglare layer>
The antiglare layer of the present invention may be any layer as long as it has a fine irregular shape on the surface, but preferably contains at least one kind of light-transmitting particles.
The antiglare layer of the present invention forms visibility (black tightening) and an antistatic layer that follows the fine irregularities of the antiglare layer, and has a translucency with an average particle diameter of 2 μm to 20 μm from the viewpoint of conductivity. It contains particles, the average film thickness is 4 to 50 μm, the average inclination angle θa of the antiglare layer surface is preferably 0.1 degree or more and 5.0 degrees or less, and the average particle diameter is 5.5 μm to 15 μm. More preferably, the average film thickness is 8 to 40 μm, and the average inclination angle of the surface of the antiglare layer is not less than 0.5 degrees and not more than 4.0 degrees.

The average inclination angle θa is defined as follows.
The antiglare layer constituting the optical laminate according to the present invention has an uneven shape. θa (degree) represents the average inclination angle of the concavo-convex portion. These can be defined as those described in the instruction manual (1995, 07, 20 revision) of the surface roughness measuring instrument (model number: SE-3400 / manufactured by Kosaka Laboratory Ltd.). θa (degrees) is a unit of angle, and when the inclination is expressed as an aspect ratio is Δa, θa (degrees) = tan ⁻¹ (Δa) = 1 / (the difference between the minimum and maximum parts of each unevenness ( The sum of the height of each convex part) and the reference length). Here, the “reference length” is 2.5 mm as a cutoff value λc of the roughness curve.

  When measuring the parameter θa representing the surface roughness of the optical layered body according to the present invention, for example, using the above-mentioned surface roughness measuring instrument, the surface roughness detector has a stylus with a model number / SE2555N manufactured by Kosaka Laboratory. It can be measured using (2 μ standard) (tip radius of curvature 2 μm / vertical angle: 90 degrees / material: diamond). This measurement is suitable for the present invention.

  More specifically, the antiglare layer of the present invention is obtained by applying and drying a coating liquid containing translucent particles having an average particle diameter of 2 μm to 20 μm, matrix forming components (such as monomers for binder) and an organic solvent. A cured layer is preferred.

  The coating solution for forming the antiglare layer includes, for example, main monomers for matrix-forming binders that are raw materials for a light-transmitting polymer formed by curing with ionizing radiation, the light-transmitting particles having the specific particle diameter, and a polymerization initiator. Preferably, it contains a polymer compound for adjusting the viscosity of the coating solution, an inorganic fine particle filler for curling reduction and refractive index adjustment, a coating aid and the like.

  The thickness of the antiglare layer is preferably 4 μm to 50 μm, more preferably 8 μm to 40 μm, and most preferably 11 μm to 25 μm. When the thickness is less than 4 μm, the surface irregularities become too large when the translucent particles described below are used, and the black tightening deteriorates. When the thickness exceeds 50 μm, the surface irregularities become small and the antiglare property is insufficient.

<Translucent particles of antiglare layer>
The average particle size of the particles is preferably 2 μm to 20 μm, more preferably 5.5 μm to 15 μm, and even more preferably 6.0 μm to 10 μm.

In the present invention, the antiglare layer may contain only one type of translucent particle, but it is more preferable to contain two types of particles having the same average particle size and different refractive indexes. In the present invention, the light-transmitting particles are dispersed in a coating solution for forming an antiglare layer and coated, dried and cured to form an antiglare layer. The average particle diameter of the translucent particles refers to the primary particle diameter regardless of whether two or more particles are present adjacent to each other in the coating film or independently. However, agglomerated inorganic particles having a primary particle size of about 0.1 μm are dispersed as secondary particles in the coating solution in a size that satisfies the particle size of the present application, and then applied to the secondary particles. Magnitude.
In this invention, it is excellent in stability of the surface shape after preserve | saving a coating liquid as the average particle diameter of particle | grains is said range. In addition, the screen is excellent in blackening and has an appropriate anti-glare property.

  In the present invention, in order to simultaneously achieve excellent antiglare properties and black tightening, in addition to the above, the ratio (φ / t) of the average particle size φ to the film thickness (t) of the translucent particles is important. . φ / t is preferably 0.3 to 0.7, and more preferably 0.35 to 0.65. Especially preferably, it is 0.4-0.6. If φ / t is too large, the surface becomes very rough and the appearance is deteriorated, and if it is too small, the black tightening is deteriorated.

  In the present invention, it is necessary to adjust the refractive index of the particles and the matrix in order to obtain the necessary internal scattering properties. The refractive index difference between at least one kind of particles and the matrix is preferably 0.02 to 0.5, more preferably 0.02 to 0.20, and most preferably 0.03 to 0.15. When two kinds of particles are included, the difference in refractive index between the particles is preferably 0.02 to 0.20, and more preferably 0.02 to 0.10.

  When two kinds of particles are included, it is also preferable that one has a refractive index lower than that of the matrix and one has a higher refractive index than that of the matrix. For example, particles having a high refractive index preferably have a refractive index of 1.54 to 1.70, more preferably 1.55 to 1.60, and particles having a low refractive index preferably have a refractive index of 1.44 to 1.53. Preferably it is 1.46-1.52. Control of internal scattering and surface shape is facilitated by the difference in refractive index between the two types of particles. Further, the stability of the surface shape after storing the coating solution is improved.

  The reason why the stability of the surface shape is improved before and after storage of the coating solution is not clear, but is estimated as follows. When particles having different refractive indexes are used, the surface state is different, so that the aggregation and dispersion behavior in the matrix is also different. By coexisting particles that are slightly different in particle size and difficult to agglomerate with particles that tend to agglomerate, the particle agglomeration does not progress during storage of the coating solution, and the surface morphology of the applied antiglare layer Stabilization is realized. For example, when a general-purpose polyfunctional acrylate compound is used as a matrix-forming binder, when resin particles having a refractive index of translucent particles of 1.54 or more are used, the tendency of the particles to agglomerate is strong. The surface shape changes easily. By mixing particles having different particle sizes, it is possible to suppress the growth of the size of the aggregates and to stabilize the surface shape. In addition, by mixing particles having a refractive index of 1.53 or less, which has a small aggregating property of the particles themselves, the growth of the aggregates can be more effectively suppressed, and the stabilization of the surface morphology is achieved.

  The amount of particles added is preferably 1 to 60% by mass, more preferably 2 to 50% by mass, and most preferably 3 to 40% by mass in the total solid content of the light scattering layer. When the particles are in this ratio, the effect of reducing the variation of the surface morphology of the coating film accompanying the change with time of the coating solution is excellent.

  The particles can be selected from the particles described below according to the desired refractive index and average particle size.

  In the present invention, resin particles and / or inorganic fine particles are used as the translucent particles.

  Specific examples of the resin particles include, for example, crosslinked polymethyl methacrylate particles, crosslinked methyl methacrylate-styrene copolymer particles, crosslinked polystyrene particles, crosslinked methyl methacrylate-methyl acrylate copolymer particles, crosslinked acrylate-styrene copolymer particles, Preferred examples include resin particles such as melamine / formaldehyde resin particles and benzoguanamine / formaldehyde resin particles. Of these, crosslinked styrene particles, crosslinked polymethyl methacrylate particles, crosslinked methyl methacrylate-styrene copolymer particles, and the like are preferable. Furthermore, the surface of these resin particles is a so-called surface-modified particle in which a compound containing a fluorine atom, a silicon atom, a carboxyl group, a hydroxyl group, an amino group, an sulfonic acid group, a phosphoric acid group or the like is chemically bonded, or a nano particle such as silica or zirconia. The particle | grains which couple | bonded the size inorganic particle to the surface are also mentioned preferably. Moreover, inorganic fine particles can also be used as the translucent particles. Specific examples of the inorganic fine particles include silica particles and alumina particles, and silica particles are particularly preferably used.

  In the present invention, when the refractive index of the matrix is 1.54 or less, and particularly preferably the refractive index is 1.53 or less, from the viewpoint of cost, the coating unevenness and interference unevenness are less noticeable. Are preferably crosslinked polymethyl methacrylate particles, crosslinked methyl methacrylate-styrene copolymer particles, and silica particles. When using crosslinked methyl methacrylate-styrene copolymer particles, the copolymerization ratio of styrene is preferably 50% or more and 90% or less.

  As the shape of the particle, either a true sphere or an irregular shape can be used. The particle size distribution is preferably monodisperse particles because of the haze value, controllability of diffusibility, and uniformity of the coated surface. For example, when particles having a particle size of 20% or more than the average particle size are defined as coarse particles, the proportion of coarse particles is preferably 1% or less, more preferably 0.1% or less of the total number of particles. Yes, more preferably 0.01% or less. Particles having such a particle size distribution are obtained by classification after a normal synthesis reaction, and particles having a more preferable distribution can be obtained by increasing the number of classifications or increasing the degree of classification.

  The particle size distribution of the particles is measured by a Coulter counter method, and the measured distribution is converted into a particle number distribution. The average particle size is calculated from the obtained particle distribution.

  In the antiglare film of the present invention, the haze value resulting from surface scattering is preferably 0 to 10%, more preferably 0.5 to 5%. By setting the surface haze to this range, an antiglare film excellent in blackening can be obtained. The haze value resulting from internal scattering is preferably 8 to 90%, more preferably 10 to 40%, and most preferably 10 to 30%. By setting the internal haze in this range, it is possible to practically satisfy the two performances of lowering the surface contrast and preventing glare. These hazes can be adjusted by adjusting the type and amount of the light-transmitting particles.

<Binder for matrix formation of antiglare layer>
Although it does not specifically limit as a binder which forms the matrix which forms an anti-glare layer, It is preferable that it is a translucent polymer which has a saturated hydrocarbon chain or a polyether chain as a main chain after hardening by ionizing radiation etc. Moreover, it is preferable that the main binder polymer after hardening has a crosslinked structure.

  As the binder polymer having a saturated hydrocarbon chain as a main chain after curing, an ethylenically unsaturated monomer selected from compounds of the first group described below and a polymer thereof are preferable. Moreover, as a polymer which has a polyether chain as a principal chain, the epoxy-type monomer chosen from the compound of the 2nd group described below and the polymer by these ring-opening are preferable. Furthermore, a polymer of a mixture of these monomers is also preferable.

  In the present invention, as the first group of compounds, the binder polymer having a saturated hydrocarbon chain as the main chain and having a crosslinked structure is a (co) polymer of monomers having two or more ethylenically unsaturated groups. Is preferred. In order to obtain a high refractive index, the monomer structure preferably contains at least one selected from an aromatic ring, a halogen atom other than fluorine, a sulfur atom, a phosphorus atom, and a nitrogen atom.

  As a monomer having two or more ethylenically unsaturated groups used in a binder polymer for forming a light scattering layer, an ester of a polyhydric alcohol and (meth) acrylic acid {for example, ethylene glycol di (meth) Acrylate, 1,4-cyclohexanediacrylate, pentaerythritol tetra (meth) acrylate, pentaerythritol tri (meth) acrylate, trimethylolpropane tri (meth) acrylate, trimethylolethane tri (meth) acrylate, dipentaerythritol tetra (meth) ) Acrylate, dipentaerythritol penta (meth) acrylate, dipentaerythritol hexa (meth) acrylate, pentaerythritol hexa (meth) acrylate, 1,2,3-chlorohexanetetrameta Relate, polyurethane polyacrylate, polyester polyacrylate}, vinylbenzene and its derivatives (eg, 1,4-divinylbenzene, 4-vinylbenzoic acid-2-acryloylethyl ester, 1,4-divinylcyclohexanone), vinyl sulfone (eg, , Divinylsulfone), (meth) acrylamide (for example, methylenebisacrylamide) and the like.

  Furthermore, resins having two or more ethylenically unsaturated groups, such as relatively low molecular weight polyester resins, polyether resins, acrylic resins, epoxy resins, urethane resins, alkyd resins, spiroacetal resins, polybutadiene resins, polythiol polyene resins And oligomers or prepolymers such as polyfunctional compounds such as polyhydric alcohols. Two or more of these monomers may be used in combination, and the resin having two or more ethylenically unsaturated groups is preferably contained in an amount of 10 to 100% based on the total amount of the binder.

  Polymerization of the monomer having an ethylenically unsaturated group can be performed by irradiation with ionizing radiation or heating in the presence of a photoradical polymerization initiator or a thermal radical polymerization initiator. Accordingly, a coating solution containing a monomer having an ethylenically unsaturated group, a photo radical polymerization initiator or a thermal radical polymerization initiator, and particles, and if necessary, an inorganic filler, a coating aid, other additives, an organic solvent and the like. After coating the coating solution on a transparent support, it is cured by a polymerization reaction with ionizing radiation or heat to form an antiglare layer. It is also preferable to perform ionizing radiation curing and thermal curing together. Commercially available compounds can be used as the photo and thermal polymerization initiators, and they are described in “Latest UV Curing Technology” (p. 159, publisher: Kazuhiro Takahisa, publisher; Technical Information Association, 1991). Issued) and Ciba Specialty Chemicals catalog.

In the present invention, the epoxy compound described below is preferably used as the second group of compounds in order to reduce the curing shrinkage of the cured film. As these monomers having an epoxy group, monomers having two or more epoxy groups in one molecule are preferable, and examples thereof include JP-A Nos. 2004-264563, 2004-264564, and 2005-37737, Examples thereof include epoxy monomers described in JP-A-2005-37738, JP-A-2005-140862, JP-A-2005-140862, JP-A-2005-140863, and JP-A-2002-322430.
The monomer having an epoxy group is preferably contained in an amount of 20 to 100% by mass with respect to all binders constituting the layer in order to reduce curing shrinkage, more preferably 35 to 100% by mass, and more preferably 50 to 100% by mass. It is more preferable to contain.

Examples of photoacid generators that generate cations by the action of light for polymerizing epoxy monomers and compounds include ionic compounds such as triarylsulfonium salts and diaryliodonium salts, and nitrobenzyl esters of sulfonic acids. Non-ionic compounds and the like can be used, and various known photoacid generators such as compounds described in “Organic Materials for Imaging” published by Bunshin Publishing Co., Ltd. (1997) can be used. . Among these, a sulfonium salt or an iodonium salt is particularly preferable, and PF ₆ ⁻ , SbF ₆ ⁻ , AsF ₆ ⁻ , B (C ₆ F ₅ ) ₄ ^{− and the} like are preferable as a counter ion.

  The polymerization initiator is preferably used in a range of 0.1 to 15 parts by mass with respect to 100 parts by mass of the compound of the first group or the second group in the total amount of the polymerization initiator. Is more preferable.

<High molecular compound of antiglare layer>
The antiglare layer of the present invention may contain a polymer compound. By adding a polymer compound, curing shrinkage can be reduced, and the viscosity of the coating solution can be adjusted.

  The polymer compound has already formed a polymer when added to the coating solution. Examples of the polymer compound include cellulose esters (for example, cellulose triacetate, cellulose diacetate, cellulose propionate, cellulose acetate Pionate, cellulose acetate butyrate, cellulose nitrate, etc.), urethane acrylates, polyester acrylates, (meth) acrylic acid esters (for example, methyl methacrylate / (meth) methyl acrylate copolymer, methyl methacrylate / (Meth) ethyl acrylate copolymer, methyl methacrylate / (meth) butyl acrylate copolymer, methyl methacrylate / styrene copolymer, methyl methacrylate / (meth) acrylic acid copolymer, polymethyl methacrylate Etc.), poly Resins such as styrene are preferably used.

  The polymer compound is preferably from 1 to 50% by mass, more preferably from 5 to 40%, based on the total binder contained in the layer containing the polymer compound, from the viewpoint of the effect on curing shrinkage and the effect of increasing the viscosity of the coating solution. It is preferable to contain in the range of mass%. Further, the molecular weight of the polymer compound is preferably from 30,000 to 400,000 in terms of mass average, more preferably from 50,000 to 300,000, and even more preferably from 50,000 to 200,000.

<Inorganic filler for antiglare layer>
In addition to the above light-transmitting particles, the antiglare layer of the present invention can be used for adjusting the refractive index, adjusting the film strength, reducing curing shrinkage, and reducing the reflectance when a low refractive index layer is provided. Inorganic fillers can also be used. For example, it is made of an oxide containing at least one metal element selected from titanium, zirconium, aluminum, indium, zinc, tin, and antimony, and the average particle size of primary particles is generally 0.2 μm or less, preferably It is also preferable to contain a fine high refractive index inorganic filler that is 0.1 μm or less, more preferably 0.06 μm or less and 1 nm or more.

  When it is necessary to lower the refractive index of the matrix in order to adjust the refractive index difference, a fine low refractive index inorganic filler such as silica fine particles or hollow silica fine particles can be used as the inorganic filler. The preferred particle size is the same as that of the fine high refractive index inorganic filler.

  The surface of the inorganic filler is preferably subjected to a silane coupling treatment or a titanium coupling treatment, and a surface treatment agent having a functional group capable of reacting with a binder species on the filler surface is preferably used.

  It is preferable that the addition amount of an inorganic filler is 10-90 mass% of the total mass of a light-scattering layer, More preferably, it is 20-80 mass%, Most preferably, it is 30-75 mass%.

  In addition, since the inorganic filler has a particle size sufficiently shorter than the wavelength of light, scattering does not occur, and the dispersion in which the filler is dispersed in the binder polymer has the property of an optically uniform substance.

<Surfactant of antiglare layer>
In the antiglare layer of the present invention, in order to ensure surface uniformity such as coating unevenness, drying unevenness, point defects, etc., either a fluorine-based surfactant or a silicone-based surfactant, or both, is used for the light scattering layer. It is preferable to contain in the coating composition. In particular, a fluorine-based surfactant is preferably used because an effect of improving surface defects such as coating unevenness, drying unevenness, and point defects of the optical film of the present invention appears with a smaller addition amount.
The purpose is to increase productivity by giving high-speed coating suitability while improving surface uniformity. Preferable examples of the fluorine-based surfactant include compounds described in paragraph numbers 0049 to 0074 of JP2007-188070A.

  The preferable addition amount of the surfactant (particularly the fluorine-based polymer) used in the antiglare layer of the present invention is in the range of 0.001 to 5% by mass, preferably 0.005 to 3% by mass with respect to the coating solution. %, And more preferably in the range of 0.01 to 1% by mass. When the addition amount of the surfactant is 0.001% by mass or more, the effect is sufficient, and by setting the addition amount to 5% by mass or less, the coating film is sufficiently dried and good performance as a coating film (for example, reflection) Rate, antistatic).

<Organic solvent of coating solution for antiglare layer>
An organic solvent can be added to the coating composition for forming the antiglare layer.

  As an organic solvent, for example, in an alcohol system, methanol, ethanol, n-propanol, isopropanol, n-butanol, isobutanol, sec-butanol, tert-butanol, isoamyl alcohol, 1-pentanol, n-hexanol, methyl amyl alcohol In the ketone system, methyl isobutyl ketone, methyl ethyl ketone, diethyl ketone, acetone, cyclohexanone, diacetone alcohol, etc., in the ester system, methyl acetate, ethyl acetate, n-propyl acetate, isopropyl acetate, isobutyl acetate, n-butyl acetate, Isoamyl acetate, n-amyl acetate, methyl propionate, ethyl propionate, methyl butyrate, ethyl butyrate, methyl acetate, methyl lactate, ethyl lactate, ether, acetal, 1,4 dioxane, te In hydrocarbons such as lahydrofuran, 2-methylfuran, tetrahydropyran, diethyl acetal, etc., hexane, heptane, octane, isooctane, ligroin, cyclohexane, methylcyclohexane, toluene, xylene, ethylbenzene, styrene, divinylbenzene, etc., halogen hydrocarbons In, carbon tetrachloride, chloroform, methylene chloride, ethylene chloride, 1,1,1-trichloroethane, 1,1,2-trichloroethane, trichloroethylene, tetrachloroethylene, 1,1,1,2-tetrachloroethane In the case of polyhydric alcohols and derivatives thereof, ethylene glycol, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monoacetate, diethylene glycol, In fatty acid systems such as lenglycol, dipropylene glycol, butanediol, hexylene glycol, 1,5-pentanediol, glycerin monoacetate, glycerin ethers, 1,2,6-hexanetriol, formic acid, acetic acid, propionic acid, In the case of nitrogen compounds such as entrained acid, isoentangled acid, isovaleric acid, and lactic acid, formamide, N, N-dimethylformamide, acetamide, acetonitrile, and the like, and in the case of sulfur compounds, dimethyl sulfoxide and the like can be mentioned.

  Among organic solvents, methyl isobutyl ketone, methyl ethyl ketone, cyclohexanone, acetone, toluene, xylene, ethyl acetate, 1-pentanol and the like are particularly preferable. In addition, an alcohol or a polyhydric alcohol solvent may be appropriately mixed with the organic solvent for the purpose of controlling cohesion. These organic solvents may be used alone or in combination, and the coating composition preferably contains 20% by mass to 90% by mass, and preferably 30% by mass to 80% by mass, as the total amount of the organic solvent. More preferably, it is most preferable to contain 40 mass%-70 mass%. In order to stabilize the surface shape of the antiglare layer, it is preferable to use a solvent having a boiling point of less than 100 ° C. and a solvent having a boiling point of 100 ° C. or more in combination.

<Curing of antiglare layer>
The anti-glare layer can be formed by applying a coating solution to a support, and then carrying out light irradiation, electron beam irradiation, heat treatment or the like to cause crosslinking or polymerization reaction. In the case of ultraviolet irradiation, ultraviolet rays emitted from light such as an ultrahigh pressure mercury lamp, a high pressure mercury lamp, a low pressure mercury lamp, a carbon arc, a xenon arc, a metal halide lamp, etc. can be used. Curing with ultraviolet rays is preferably carried out by nitrogen purge or the like in an atmosphere having an oxygen concentration of 4% by volume or less, more preferably 2% by volume or less, and most preferably 0.5% by volume or less.

<Transparent support>
A plastic film is preferably used as the transparent support of the optical film of the present invention. Examples of the polymer forming the plastic film include cellulose acylate (eg, triacetyl cellulose, diacetyl cellulose, typically TAC-TD80U, TD80UF, etc. manufactured by Fuji Film), polyamide, polycarbonate, polyester (eg, polyethylene terephthalate, polyethylene). Naphthalate), polystyrene, polyolefin, norbornene resin (Arton: trade name, manufactured by JSR), amorphous polyolefin (ZEONEX: trade name, manufactured by ZEON CORPORATION), (meth) acrylic resin (ACRYPET VRL20A: product) Name, manufactured by Mitsubishi Rayon Co., Ltd., ring structure-containing acrylic resin described in JP-A No. 2004-70296 and JP-A No. 2006-171464), and the like. Of these, triacetyl cellulose, polyethylene terephthalate, and polyethylene naphthalate are preferable, and triacetyl cellulose is particularly preferable.

  When the optical film of the present invention is used in a liquid crystal display device, it is disposed on the outermost surface of the display by providing an adhesive layer on one side. Moreover, you may combine the optical film and polarizing plate of this invention. When the transparent support is triacetyl cellulose, triacetyl cellulose is used as a protective film for protecting the polarizing layer of the polarizing plate. Therefore, it is preferable in terms of cost to use the optical film of the present invention as it is for the protective film.

When the antiglare film of the present invention is used as it is as a protective film for a polarizing plate, it is preferable to carry out a saponification treatment after forming the outermost layer on the transparent support in order to sufficiently adhere it. The saponification treatment is performed by a known method, for example, by immersing the film in an alkali solution for an appropriate time. After being immersed in the alkaline solution, it is preferable to sufficiently wash with water or neutralize the alkaline component by dipping in a dilute acid so that the alkaline component does not remain in the film.
By saponification treatment, the surface of the transparent support opposite to the side having the outermost layer is hydrophilized.

<Application method>
The antiglare film of the present invention can be formed by the following method, but is not limited to this method. First, a coating solution containing components for forming each layer is prepared. Next, a coating solution for forming an antiglare layer is applied onto the transparent support by dip coating, air knife coating, curtain coating, roller coating, wire bar coating, gravure coating, or die coating. The microgravure coating method, the wire bar coating method, and the die coating method (see US Pat. No. 2,681,294 and JP-A-2006-122889) are more preferable, and the die coating method is particularly preferable.

  Thereafter, the monomer for forming the antiglare layer is polymerized and cured by light irradiation or heating. Thereby, an anti-glare layer is formed.

Next, a coating solution for forming an antistatic layer is applied on the antiglare layer in the same manner, and light irradiation is performed to form the antistatic layer. Thus, the antiglare film of the present invention is obtained.
When another functional layer is formed under the antiglare layer or between the antiglare layer and the antistatic layer, it can be formed using the same method as that for the antiglare layer.

<Polarizing plate>
The polarizing plate is mainly composed of two protective films that protect both the front and back sides of the polarizing film. The optical film of the present invention is preferably used for at least one of the two protective films sandwiching the polarizing film from both sides. The manufacturing cost of a polarizing plate can be reduced because the optical film of the present invention also serves as a protective film. In addition, by using the optical film of the present invention as the outermost layer, reflection of external light and the like can be prevented, and a polarizing plate having excellent scratch resistance, antifouling property and the like can be obtained.

The hydrophilized surface is particularly effective for improving the adhesion with a polarizing film containing polyvinyl alcohol as a main component. In addition, the hydrophilic surface makes it difficult for dust in the air to adhere to it, making it difficult for dust to enter between the polarizing film and the optical film when bonded to the polarizing film, and is effective in preventing point defects caused by dust. It is.
The saponification treatment is preferably carried out so that the contact angle of water on the surface of the transparent support opposite to the side having the outermost layer is 40 ° or less. More preferably, it is 30 ° or less, particularly preferably 20 ° or less.

<Image display device>
The optical film of the present invention is applied to an image display device such as a liquid crystal display device (LCD), a plasma display panel (PDP), an electroluminescence display (ELD), a cathode ray tube display device (CRT), and a surface electric field display (SED). can do. It is particularly preferably used for a liquid crystal display (LCD). Since the optical film of the present invention has a transparent support, it is used by bonding the transparent support side to the image display surface of the image display device.

  When the optical film of the present invention is used as one side of a surface protective film of a polarizing film, twisted nematic (TN), super twisted nematic (STN), vertical alignment (VA), in-plane switching (IPS), optically It can be preferably used for a transmissive, reflective, or transflective liquid crystal display device in a mode such as a compensated bend cell (OCB).

  In order to describe the present invention in detail, examples will be described below, but the present invention is not limited thereto. Unless otherwise specified, “part” and “%” are based on mass.

(Preparation of coating solution for antiglare layer and antistatic layer)
The coating solutions for the antiglare layer and antistatic layer used in this example are described below.

Composition of coating liquid A-1 for anti-glare layer PET-30 65.0 g
Irgacure 127 3.0g
8μm crosslinked acrylic particles (30%) 20.0g
8μm cross-linked acrylic / styrene particles (30%) 52.6g
SP-13 0.2g
CAB 0.5g
MIBK 72.6g
MEK 32.5g

Each coating solution for the antiglare layer was filtered through a polypropylene filter having a pore size of 30 μm to prepare a coating solution.
Using the above coating solution, an antiglare layer was applied according to the description of “(1) Application of antiglare layer” described later, and the average inclination angle θa of the uneven surface measured after curing was 1.1 degrees, and the integration The reflectance was 4.5%.

The refractive index of the particles was as follows.
8 μm crosslinked acrylic particles 1.500
8μm cross-linked acrylic / styrene particles 1.555

  Sample No. shown in Table 1 In 110 and 111, a coating solution for an antiglare layer was prepared by changing the ratio of particles and the refractive index so that the average inclination angle θa was the value shown in Table 1. The refractive index of the antiglare layer was 1.52. Sample 106 was prepared without adding the above light-transmitting particles, and the average tilt angle was 0 degree.

[Preparation of dispersion of inorganic fine particles]
<Dispersion A-1>
Commercially available conductive fine particles ATO “antimony-doped tin oxide T-1” {specific surface area 80 m ² / g, manufactured by Mitsubishi Materials Corp.} 20.0 parts by mass with the following dispersant having an anionic group and a methacryloyl group (B-1) 6.0 parts by mass and 74 parts by mass of methyl isobutyl ketone were added and stirred.

  The ATO particles in the liquid were dispersed using a media disperser (using zirconia beads having a diameter of 0.1 mm). It was 55 nm as a result of evaluating the mass mean particle diameter of the ATO particle | grains in a dispersion liquid by the light-scattering method. Thus, ATO dispersion liquid A-1 was produced.

<Dispersion A-2>
Silica fine particle sol (manufactured by Nissan Chemical Industries, Ltd. methanol silica sol, average particle size 12 nm, silica concentration 30%), 333 parts by mass, acryloyloxypropyltrimethoxysilane 8 parts by mass, and diisopropoxyaluminum ethyl acetate 1.5 parts by mass After addition and mixing, 9 parts of ion exchange water was added. After making it react at 60 degreeC for 8 hours, it cooled to room temperature and added 1.8 mass parts of acetylacetone. The solvent was replaced by distillation under reduced pressure while adding MEK so that the total liquid volume was almost constant. Silica dispersion A-2 was prepared by adjusting the final solid content to 20% by mass.

Composition of coating solution ASL-1 for antistatic layer (refractive index of antistatic layer: 1.51)
ATO dispersion A-1 (20%) 100.0 g
Silica dispersion A-2 (20%) 30.0 g
Irgacure 127 3.4g
Compound F-1 33.8 g
DPHA 33.8g
CAB 3.0g
MEK 2101.7g
MMPG-Ac 551.4g

Composition of coating solution ASL-2 for antistatic layer (refractive index of antistatic layer: 1.49)
Silica dispersion A-2 (20%) 130.0 g
Irgacure 127 3.4g
Compound F-1 33.8 g
DPHA 33.8g
CAB 3.0g
MEK 2101.7g
MMPG-Ac 551.4g

Composition of coating solution ASL-3 for antistatic layer (refractive index of antistatic layer: 1.51)
ATO dispersion A-1 (20%) 100.0 g
Silica dispersion A-2 (20%) 30.0 g
Irgacure 127 3.4g
Compound P-1 67.6g
CAB 3.0g
MEK 2101.7g
MMPG-Ac 551.4g

Composition of coating solution ASL-4 for antistatic layer (refractive index of antistatic layer: 1.51)
ATO dispersion A-1 (20%) 100.0 g
Silica dispersion A-2 (20%) 30.0 g
Irgacure 127 3.4g
Compound F-1 33.8 g
DPHA 33.8g
MEK 2101.7g
MMPG-Ac 551.4g

Composition of coating solution ASL-5 for antistatic layer (refractive index of antistatic layer: 1.50)
ATO dispersion A-1 (20%) 80.0 g
Silica dispersion A-2 (20%) 50.0 g
Irgacure 127 3.4g
DPHA 69.6g
CAB 3.0g
MEK 2101.7g
MMPG-Ac 551.4g

Composition of coating solution ASL-6 for antistatic layer (refractive index of antistatic layer: 1.51)
ATO dispersion A-1 (20%) 100.0 g
Silica dispersion A-2 (20%) 30.0 g
Irgacure 127 3.4g
Compound F-2 33.8 g
DPHA 33.8g
CAB 3.0g
MEK 2101.7g
MMPG-Ac 551.4g

Composition of coating solution ASL-7 for antistatic layer (refractive index of antistatic layer: 1.51)
ATO dispersion A-1 (20%) 100.0 g
Silica dispersion A-2 (20%) 30.0 g
Irgacure 127 3.4g
Compound F-1 33.8 g
DPHA 33.8g
Polymethylmethacrylate (PMMA) 3.0g
MEK 2101.7g
MMPG-Ac 551.4g

  The antistatic layer coating solution was filtered through a polypropylene filter having a pore size of 1 μm to prepare a coating solution.

The compounds used are shown below.
PET-30: A mixture of pentaerythritol triacrylate and pentaerythritol tetraacrylate [manufactured by Nippon Kayaku Co., Ltd.]
DPHA: A mixture of dipentaerythritol pentaacrylate and dipentaerythritol hexaacrylate [manufactured by Nippon Kayaku Co., Ltd.]
8 μm cross-linked acrylic particles (30%): 30 wt% MIBK dispersion with an average particle size of 8.0 μm [manufactured by Soken Chemical Co., Ltd., prepared by dispersing at 10,000 rpm for 20 minutes with a Polytron disperser)
8 μm cross-linked acrylic / styrene particles (30%): 30 wt% MIBK dispersion with an average particle size of 8.0 μm [manufactured by Sekisui Plastics Co., Ltd., prepared by dispersing at 10,000 rpm for 20 minutes with a Polytron disperser)
Irgacure 127: Polymerization initiator [Ciba Specialty Chemicals Co., Ltd.];
CAB: cellulose acetate butyrate (number average molecular weight 40000)
PMMA: Polymethyl methacrylate (number average molecular weight 40000)
MIBK: methyl isobutyl ketone MEK: methyl ethyl ketone MMPG-Ac: propylene glycol monomethyl ether acetate

  SP-13: Fluorine-based surfactant having the following structure (used after dissolving as a 10% by mass solution of MEK)

Compound F-1: Compound (3) described in paragraph [0015] of Japanese Patent No. 3890022
Compound F-2: Compound M-1 described in paragraph [0063] of JP-A-2008-134585
Compound P-1: Fluoropolymer (A-1) described in Production Example 3 of JP-A-2005-89536

[Example 1: Production of antiglare film samples 101 to 111]
(1) Coating of antiglare layer An 80 μm-thick triacetyl cellulose film (TAC-TD80U, manufactured by Fuji Film Co., Ltd.) is unwound from the roll form, and antiglare layer coating liquid A-1 is used. In the die coating method using the slot die described in Example 1 of JP-A-2006-122889, the coating was performed at a conveyance speed of 30 m / min, dried at 60 ° C. for 150 seconds, and then the oxygen concentration was reduced under a nitrogen purge. Using an air-cooled metal halide lamp (manufactured by Eye Graphics Co., Ltd.) of 0.1% and 160 W / cm, the coating layer is cured by irradiating with ultraviolet rays having an illuminance of 400 mW / cm ² and an irradiation amount of 100 mJ / cm ^2. It was. The coating amount was adjusted so that the film thickness of each antiglare layer was 13 μm.

(2) Coating of antistatic layer The triacetyl cellulose film coated with the antiglare layer was unwound again, and the coating solution for the antistatic layer was transferred by a die coating method using the slot die at a conveyance speed of 30 m / After applying for 75 minutes and drying at 90 ° C. for 75 seconds, using an air-cooled metal halide lamp (made by Eye Graphics Co., Ltd.) with an oxygen concentration of 0.01 to 0.1% and a nitrogen purge of 240 W / cm, Irradiation with ultraviolet rays with an illuminance of 400 mW / cm ² and an irradiation amount of 240 mJ / cm ² , the coating amount was adjusted so as to have the film thickness shown in Table 1, an antistatic layer was formed, and the film was wound up to produce an antiglare film .
In the sample of sample No. 101, the antistatic layer was not laminated.

(Saponification treatment of antiglare film)
The samples 101 to 111 produced above were subjected to the following treatment. A 1.5 mol / L aqueous sodium hydroxide solution was prepared and kept at 55 ° C. A 0.01 mol / L dilute sulfuric acid aqueous solution was prepared and kept at 35 ° C. The produced optical film was immersed in the aqueous sodium hydroxide solution for 2 minutes and then immersed in water to sufficiently wash away the aqueous sodium hydroxide solution. Subsequently, after being immersed in the above-mentioned dilute sulfuric acid aqueous solution for 1 minute, it was immersed in water to sufficiently wash away the dilute sulfuric acid aqueous solution. Finally, the sample was thoroughly dried at 120 ° C.
In this way, saponified antiglare films (101 to 111) were produced.

(Preparation of polarizing plate)
A polarizing film was prepared by adsorbing iodine to a stretched polyvinyl alcohol film. Next, a saponified antiglare film (101 to 111) was attached to one side of the polarizing film using a polyvinyl alcohol adhesive so that the cellulose triacetate side of the antiglare film was the polarizing film side. In addition, a commercially available cellulose triacetate film “Fujitac TD80UF” (manufactured by Fuji Film Co., Ltd.) was attached to the side of the polarizing film opposite to the side on which the antiglare film was applied using a polyvinyl alcohol adhesive. In this way, polarizing plates (HK-01) to (HK-11) with an antiglare film were produced.

(Evaluation of antiglare film and polarizing plate)
About the obtained anti-glare film and polarizing plate sample, the following items were evaluated. The results are shown in Table 1.

(1) Evaluation of dust adhesion The transparent support side of the antiglare film is attached to the surface of the CRT, and it is a room having 1 to ² million pieces of dust of 0.5 μm or more and tissue paper waste per 1 ft ³ (legislation feet) for 24 hours. used. The number of adhering dust and tissue paper scraps per 100 cm ^{2 of the} anti-glare film is measured, the average value of each result is less than 20, ◎ 20 to 49, ○, 50 to 199 Was evaluated as Δ, and the case of 200 or more was evaluated as ×.

(2) Evaluation of Integral Sphere Reflectance Using a spectrophotometer V-550 (manufactured by JASCO Corporation), the integral sphere reflectance of the antiglare film was measured in the wavelength region of 380 to 780 nm, and the reflectivity was 450 to 650 nm. The average reflectance was calculated and the antireflection property was evaluated. By adding an antistatic layer, the reflectance is reduced by 0.5% or more, ◎, when it is reduced below 0.5%, ◯ when it is not changed within ± 0.1%, and increased. The case was evaluated as x.

From the results shown in Table 1, the following is clear.
The antiglare layer has the antistatic layer of the present invention, and the antistatic layer is (A) conductive fine particles having an average particle diameter of 1 to 150 nm, (B) ionizing radiation curable monomer, and (C) organic polymer thickening. When formed from a composition containing an agent, it is possible to obtain an antiglare film that hardly adheres to dust and has a low reflectance.

[Example 2: Production of antiglare film sample 112 imparted with antifouling properties]

  In the antistatic layer coating liquid ASL-1, the dispersion A-1 is changed to the following A-3, the dispersion A-2 is changed to the following A-4, the compound F-1 is changed to the following compound F-3, and the antistatic layer is changed. Coating solution ASL-8 was prepared in the same manner as ASL-1. An antiglare film sample 112 was prepared in the same manner as the sample 102 except that the antistatic layer coating solution ASL-1 of the sample 102 prepared in Example 1 was changed to the coating solution ASL-8.

Composition of coating solution ASL-8 for antistatic layer Dispersion A-3 (20%) 100.0 g
Dispersion A-4 (20%) 30.0 g
Irgacure 127 3.4g
Compound F-3 33.8 g
DPHA 33.8g
CAB 3.0g
MEK 2101.7g
MMPG-Ac 551.4g

  Here, the compound F-3 used is the compound described in paragraph No. [0034] of JP-A No. 11-80312.

[Dispersion of inorganic fine particles]
<Dispersion A-3>
Hollow silica particle dispersion coated with antimony oxide described in paragraphs [0372] to [0376] of JP-A-2007-199409 <Dispersion A-4>
Hollow silica particle dispersion described in paragraph No. [0394] of JP-A-2007-199409

  The obtained sample 112 was evaluated in the same manner as 102 prepared in Example 1, and the same result as that of the sample 102 was obtained.

Claims (11)

On the transparent plastic film substrate, it has an antiglare layer having fine irregularities on the surface, and an antistatic layer on the outermost surface of the antiglare layer, and the antistatic layer comprises the following (A), (B ), And an antiglare film formed from the curable composition containing the component (C).
(A) Conductive fine particles having an average particle diameter of 1-150 nm (B) Ionizing radiation curable monomer (C) Organic polymer thickener   2. The antiglare film according to claim 1, wherein an average inclination angle θa of the surface of the antiglare layer is 0.1 ° or more and 5.0 ° or less.   The anti-glare film according to claim 1 or 2, wherein the antistatic layer contains substantially no insulating polymer binder component.   The antiglare film according to any one of claims 1 to 3, wherein a refractive index of the antistatic layer is lower than a refractive index of the antiglare layer. The antistatic layer is a cured product of a composition containing the following component (D) in addition to the components (A), (B), and (C). Anti-glare film.
(D) Inorganic fine particles mainly composed of silicon oxide having an average particle diameter of 1 to 300 nm   The antiglare film according to any one of claims 1 to 5, wherein the ionizing radiation curable monomer of the component (B) in the composition contains fluorine.   The antiglare film according to any one of claims 1 to 6, wherein the organic polymer thickener of the component (C) in the composition is a cellulose ester.   The antiglare film according to any one of claims 5 to 7, wherein at least one of the component (A) and the component (D) in the composition is porous or fine particles having a cavity inside.   The antiglare film according to any one of claims 1 to 8, wherein the antiglare layer contains at least one kind of translucent particles.   The polarizing plate which has the anti-glare film in any one of Claims 1-9 in at least one of the protective films of a polarizing film.   The image display apparatus which has the anti-glare film in any one of Claims 1-9, or the polarizing plate of Claim 10 in an image display surface.