JP2007268753A - Optical film, antireflection film, polarizing plate and image display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical film excellent in scratch resistance while having optical properties necessary as a surface film of a display. <P>SOLUTION: The optical film has at least one layer of a hard coat layer comprising a translucent resin on a transparent support. The outermost layer of the film has a surface haze of ≤20% and a coefficient of dynamic friction μ<SB>k</SB>of ≤0.30. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an optical film, an antireflection film, a polarizing plate, and a liquid crystal display device.

In display devices such as liquid crystal display (LCD), plasma display (PDP), electroluminescence display (ELD) and cathode ray tube display (CRT), an optical film having a protective function on the outermost surface of the display, or reflection of external light In addition, an antiglare film or an antireflection film for preventing a decrease in contrast due to reflection is used. Since these films are used on the outermost surface of the display, in addition to the above performance, scratch resistance that makes it difficult to be scratched in daily wiping and cleaning becomes one of the important performances. In order to meet this demand, a method of obtaining a coating film having high hardness and excellent scratch resistance using a novel acrylate monomer has been carried out, but it has not been sufficient for improving the scratch resistance.
JP 2002-233501 A

The present inventors have found that if there are many irregularities on the film surface in order to impart antiglare properties, the convex portions are vulnerable to scratches and scratches, and as a result, the scratch resistance may be reduced.
Therefore, in the present invention, by reducing the surface haze and improving the slipperiness of the film surface, the resistance is reduced and the scratch resistance is improved.
That is, an object of the present invention is to improve the scratch resistance while having sufficient optical performance, particularly in an antiglare film having irregularities on the surface.
Furthermore, in the present invention, particularly in an antiglare film having irregularities on the surface, the object is to improve the scratch resistance while having sufficient optical performance and to suppress curling.
Moreover, an object of this invention is to provide the polarizing plate and image display apparatus provided with said optical film.

As a result of intensive studies to solve the above-described problems, the present inventors have found that the above-described problems can be solved and the object can be achieved, and the present invention has been completed.
That is, the present invention is as follows.
(1) An optical film having at least one layer of the hard coat layer comprising a light-transmissive resin on a transparent substrate, the outermost layer of the film is, the surface haze of 20% or less, the dynamic friction coefficient mu _k is 0 An optical film having a thickness of 30 or less.
(2) The optical film as described in (1) above, wherein the hard coat layer has a thickness of 8 to 30 μm.
(3) The hard coat layer can be formed by a crosslinking reaction or a polymerization reaction of an ionizing radiation curable compound, and the amount of surface double bonds A before curing of the hard coat layer and the remaining surface after curing The optical film as described in (1) or (2) above, wherein the ratio (B / A) to the double bond amount B is in the range of 0.05 ≦ B / A ≦ 0.5.
(4) The hard coat layer is a layer obtained by curing a curable composition containing a compound having two or more ethylenically unsaturated groups and one or more isocyanurate rings in the same molecule ( The optical film as described in any one of 1) to (3).
(5) The hard coat layer contains at least one fluorine compound and / or at least one silicone compound as an additive, according to any one of the above (1) to (4), Optical film.
(6) An optical film having at least one layer of the hard coat layer comprising a light-transmissive resin on a transparent substrate, the outermost layer of the film is, the surface haze is 10% or less, the dynamic friction coefficient mu _k is 0 An optical film having a thickness of 30 or less.
(7) The optical film according to any one of (1) to (6), wherein the outermost layer has a low refractive index layer having a refractive index smaller than that of the transparent support, and is antireflective. the film.
(8) The antireflective film as described in (7) above, wherein the low refractive index layer contains at least one fluorine compound and / or at least one silicone compound as an additive.
(9) A polarizing plate having a polarizer between two protective films, wherein at least one of the protective films is the optical film according to any one of (1) to (6) above or ( A polarizing plate, which is the antireflection film according to any one of 7) to (8).
(10) The optical film according to any one of (1) to (6), the antireflection film according to any one of (7) to (8), or the above (9). An image display device comprising a polarizing plate.

  The optical film of the present invention exhibits high scratch resistance without reducing optical performance by reducing surface haze and improving slipperiness. In addition to the above performance, the optical film of the present invention suppresses curling. A polarizing plate using the optical film of the present invention (particularly an antireflection film) exhibits the above-described excellent performance. Furthermore, a display device provided with the optical film of the present invention (particularly, an antireflection film) has very high visibility because there is little reflection of external light and reflection of the background.

  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.

1. Layers constituting film The optical film of the present invention has at least one hard coat layer containing a translucent resin on a transparent support, and haze (hereinafter referred to as surface) due to surface scattering of the outermost layer of the film. (Called haze) is 0% to 20%, and the dynamic friction coefficient μ _k is 0.30 or less.
The surface haze is preferably 0% to 10%, more preferably 0% to 5%, and most preferably 0% to 2%. If the surface haze exceeds 20%, the strength of the film surface becomes weak due to surface irregularities, and the scratch resistance deteriorates. Further, the dynamic friction coefficient μ _k is preferably 0.25 or less, particularly preferably 0.20 or less. When the number of dynamic friction systems exceeds 0.30, the surface slipperiness decreases and the scratch resistance deteriorates.
By reducing the surface haze and improving the slipperiness, an optical film having excellent visibility and improved scratch resistance can be obtained.

In the optical film of the present invention, haze caused by internal scattering (hereinafter referred to as internal haze) is preferably 1% to 40%, more preferably 1% to 25%, and more preferably 1% Most preferred is -15%. The lower the internal haze, the less likely it is to cause a decrease in contrast. If it exceeds 40%, a significant deterioration in contrast cannot be tolerated.
As a combination of the internal haze and the surface haze, the surface haze is preferably 0 to 20%, and the internal haze is preferably 1 to 35%, the surface haze is 0 to 10%, and the internal haze is 1 to 1. More preferably, the surface haze is 0 to 5%, and the internal haze is most preferably 1 to 15%.

  Hereinafter, it describes about the layer which comprises the optical film of this invention. The optical film of the present invention is obtained by mixing and coating various compounds described below.

(Layer structure of optical film)
The optical film of the present invention has at least one hard coat layer containing a translucent resin on a transparent support, and may have an optical functional layer in addition to the hard coat layer. Examples of the optical functional layer include an antireflection layer and an intermediate layer whose refractive index is controlled. Specifically, the antireflection layer is a layer in which the refractive index and the film thickness are controlled so that the reflectance is reduced by optical interference, and examples thereof include a low refractive index layer having a refractive index lower than that of the transparent support. The optical functional layer in the present invention is most preferably a low refractive index layer (hereinafter, an optical film having an antireflection layer may be referred to as “antireflection film” in the present specification).

  The antireflection film of the present invention has a hard coat layer to be described later on a transparent substrate (support), and has a refractive index, a film thickness, and the number of layers so that the reflectance decreases due to optical interference. The antireflection layer is laminated in consideration of the layer order and the like. In order to reduce the reflectance of the antireflection film, the antireflection layer is formed by combining a high refractive index layer having a higher refractive index than that of the base material and a low refractive index layer having a lower refractive index than that of the base material. It is preferable. Examples of configurations include two layers of a high refractive index layer / low refractive index layer from the base material side, and three layers having different refractive indices, a medium refractive index layer (having a higher refractive index than the base material or the hard coat layer). , A layer having a refractive index lower than that of a high refractive index layer) / a layer having a high refractive index / a layer having a low refractive index, and the like.

The hard coat layer may be an anti-glare hard coat layer (hereinafter also referred to as “anti-glare layer”) having irregularities on the surface.
The optical functional layer may be any of a low refractive index layer, a medium refractive index layer, and a high refractive index layer. Furthermore, there may be a different layer between the (antiglare) hard coat layer and the optical functional layer, but the (antiglare) hard coat layer and the optical functional layer are in direct contact with each other from the viewpoint of productivity. preferable.

The low refractive index layer of the present invention is formed by applying and curing a curable composition containing a fluorine-containing compound as a main component or a monomer having a plurality of bonding groups in the molecule and low refractive index particles. Thus, the refractive index is adjusted in the range of 1.20 to 1.50. 1.25 to 1.45 are preferred. More preferably 1.30 to 1.40.
Preferred embodiments of the cured product composition include (1) a composition containing a fluorine-containing polymer having a crosslinkable or polymerizable functional group, and (2) a hydrolysis condensate of a fluorine-containing organosilane material as a main component. Composition, (3) a composition containing a monomer having two or more ethylenically unsaturated groups and inorganic fine particles having a hollow structure, thereby comparing with a low refractive index layer using magnesium fluoride or calcium fluoride Even when used as the outermost layer, an optical film excellent in scratch resistance can be obtained.

The example of the preferable layer structure of the antireflection film of this invention is shown below.
In the following layer configuration, the optical functional layer may be any of a low refractive index layer, a medium refractive index layer, and a high refractive index layer.
Base film / (anti-glare) hard coat layer / low refractive index layer Base film / hard coat layer / (anti-glare) hard coat layer / low refractive index layer Base film / (anti-glare) hard coat layer / High refractive index layer / Low refractive index layer Base film / (Anti-glare) Hard coat layer / Medium refractive index layer / High refractive index layer / Low refractive index layer Base film / Antistatic layer / (Anti-glare) Hard coat layer / low refractive index layer Antistatic layer / base film / (antiglare) hard coat layer / low refractive index layer base film / antistatic layer / (antiglare) hard coat layer / medium refractive index layer / High refractive index layer / Low refractive index layer Antistatic layer / Base film / (Anti-glare) hard coat layer / Medium refractive index layer / High refractive index layer / Low refractive index layer

The antireflection layer is not particularly limited to these layer configurations as long as the reflectance can be reduced by optical interference. The hard coat layer may be an antiglare hard coat layer imparted with an antiglare function. The hard coat layer may be a light diffusive hard coat layer having no antiglare function and having a light diffusion function. Further, the high refractive index layer and the middle refractive index layer may be provided with an antiglare function, a hard coat function, and a light diffusion function. The antistatic layer is preferably a layer containing conductive polymer particles or metal oxide fine particles (for example, SnO ₂ , ITO), and can be provided by coating or atmospheric pressure plasma treatment.

2. First, the various compounds that can be used for the optical film of the present invention (hereinafter sometimes simply referred to as “film”) will be described.

2- (1) Monomer Binder The film of the present invention can be formed by a crosslinking reaction or a polymerization reaction of an ionizing radiation curable compound. That is, a coating composition containing an ionizing radiation-curable polyfunctional monomer or polyfunctional oligomer as a binder is coated on a transparent support, and the polyfunctional monomer or polyfunctional oligomer is formed by a crosslinking reaction or a polymerization reaction. be able to.
The functional group of the ionizing radiation curable polyfunctional monomer or polyfunctional oligomer is preferably a light, electron beam, or radiation polymerizable group, and among them, a photopolymerizable functional group is preferable.
Examples of the photopolymerizable functional group include unsaturated polymerizable functional groups such as a (meth) acryloyl group, a vinyl group, a styryl group, and an allyl group. Among them, a (meth) acryloyl group is preferable.

As a specific example of a photopolymerizable polyfunctional monomer having a photopolymerizable functional group,
(Meth) acrylic acid diesters of alkylene glycol such as neopentyl glycol acrylate, 1,6-hexanediol (meth) acrylate, 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;
(Meth) acrylic acid diesters of polyhydric alcohols such as pentaerythritol di (meth) acrylate;
(Meth) acrylic acid diesters of ethylene oxide or propylene oxide adducts such as 2,2-bis {4- (acryloxy · diethoxy) phenyl} propane and 2-bis {4- (acryloxy · polypropoxy) phenyl} propane ;
Etc.

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

  Among these, esters of polyhydric alcohol and (meth) acrylic acid are preferable. More preferably, a polyfunctional monomer having 3 or more (meth) acryloyl groups in one molecule is 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. In the present specification, “(meth) acrylate”, “(meth) acrylic acid”, and “(meth) acryloyl” represent “acrylate or methacrylate”, “acrylic acid or methacrylic acid”, and “acryloyl or methacryloyl”, respectively. .

As the monomer binder, monomers having different refractive indexes can be used to control the refractive index of each layer. Examples of particularly high refractive index monomers include bis (4-methacryloylthiophenyl) sulfide, vinyl naphthalene, vinyl phenyl sulfide, 4-methacryloxyphenyl-4′-methoxyphenyl thioether, and the like.
Further, for example, dendrimers described in JP-A-2005-76005 and JP-A-2005-36105, and norbornene ring-containing monomers as described in JP-A-2005-60425 can also be used.

Two or more polyfunctional monomers may be used in combination.
Polymerization of these monomers having an ethylenically unsaturated group can be carried out by irradiation with ionizing radiation or heating in the presence of a photo radical initiator or a thermal radical initiator.
It is preferable to use a photopolymerization initiator for the polymerization reaction of the photopolymerizable polyfunctional monomer. As the photopolymerization initiator, a photoradical polymerization initiator and a photocationic polymerization initiator are preferable, and a photoradical polymerization initiator is particularly preferable.

2- (2) Polymer Binder In the present invention, a polymer or a crosslinked polymer can be used as the binder. The crosslinked polymer preferably has an anionic group. The polymer having a crosslinked anionic group has a structure in which the main chain of the polymer having an anionic group is crosslinked.

Examples of the polymer main chain include polyolefin (saturated hydrocarbon), polyether, polyurea, polyurethane, polyester, polyamine, polyamide and melamine resin. A polyolefin main chain, a polyether main chain and a polyurea main chain are preferable, a polyolefin main chain and a polyether main chain are more preferable, and a polyolefin main chain is most preferable.
The polyolefin main chain consists of saturated hydrocarbons. The polyolefin main chain is obtained, for example, by an addition polymerization reaction of an unsaturated polymerizable group. The polyether main chain has repeating units bonded by an ether bond (—O—). The polyether main chain is obtained, for example, by a ring-opening polymerization reaction of an epoxy group. In the polyurea main chain, repeating units are bonded by a urea bond (—NH—CO—NH—). The polyurea main chain is obtained, for example, by a condensation polymerization reaction between an isocyanate group and an amino group. The polyurethane main chain has repeating units bonded by urethane bonds (—NH—CO—O—). The polyurethane main chain is obtained, for example, by a polycondensation reaction between an isocyanate group and a hydroxyl group (including an N-methylol group). The polyester main chain has repeating units bonded by an ester bond (—CO—O—). The polyester main chain is obtained, for example, by a condensation polymerization reaction between a carboxyl group (including an acid halide group) and a hydroxyl group (including an N-methylol group). The polyamine main chain has repeating units bonded by imino bonds (—NH—). The polyamine main chain is obtained, for example, by a ring-opening polymerization reaction of an ethyleneimine group. The polyamide main chain has repeating units bonded by an amide bond (—NH—CO—). The polyamide main chain is obtained, for example, by a reaction between an isocyanate group and a carboxyl group (including an acid halide group). The melamine resin main chain is obtained, for example, by a polycondensation reaction between a triazine group (eg, melamine) and an aldehyde (eg, formaldehyde). In the melamine resin, the main chain itself has a crosslinked structure.

The anionic group is bonded directly to the main chain of the polymer or bonded to the main chain via a linking group. The anionic group is preferably bonded to the main chain as a side chain via a linking group.
Examples of the anionic group include a carboxylic acid group (carboxyl), a sulfonic acid group (sulfo), and a phosphoric acid group (phosphono), and a sulfonic acid group and a phosphoric acid group are preferable.
The anionic group may be in a salt state. The cation that forms a salt with the anionic group is preferably an alkali metal ion. Moreover, the proton of the anionic group may be dissociated.
The linking group that connects the anionic group and the main chain of the polymer is preferably a divalent group selected from —CO—, —O—, an alkylene group, an arylene group, and combinations thereof.

  The crosslinked structure is a structure in which two or more main chains are chemically bonded (preferably covalent bonds), but it is preferable to covalently bond three or more main chains. The crosslinked structure is preferably composed of a divalent or higher valent group selected from —CO—, —O—, —S—, a nitrogen atom, a phosphorus atom, an aliphatic residue, an aromatic residue, and combinations thereof.

  The crosslinked polymer having an anionic group is preferably a copolymer having a repeating unit having an anionic group and a repeating unit having a crosslinked structure. The proportion of the repeating unit having an anionic group in the copolymer is preferably 2 to 96% by mass, more preferably 4 to 94% by mass, and most preferably 6 to 92% by mass. The repeating unit may have two or more anionic groups. The proportion of the repeating unit having a crosslinked structure in the copolymer is preferably 4 to 98% by mass, more preferably 6 to 96% by mass, and most preferably 8 to 94% by mass.

The repeating unit of the polymer having a crosslinked anionic group may have both an anionic group and a crosslinked structure. Further, other repeating units (repeating units having neither an anionic group nor a crosslinked structure) may be contained.
Other repeating units are preferably a repeating unit having an amino group or a quaternary ammonium group and a repeating unit having a benzene ring. The amino group or the quaternary ammonium group has a function of maintaining the dispersed state of the inorganic particles, like the anionic group. The same effect can be obtained even when the amino group, quaternary ammonium group and benzene ring are contained in a repeating unit having an anionic group or a repeating unit having a crosslinked structure.
In a repeating unit having an amino group or a quaternary ammonium group, the amino group or quaternary ammonium group is directly bonded to the main chain of the polymer or bonded to the main chain through a linking group. The amino group or quaternary ammonium group is preferably bonded to the main chain as a side chain via a linking group. The amino group or quaternary ammonium group is preferably a secondary amino group, a tertiary amino group or a quaternary ammonium group, more preferably a tertiary amino group or a quaternary ammonium group. The group bonded to the nitrogen atom of the secondary amino group, tertiary amino group or quaternary ammonium group is preferably an alkyl group, preferably an alkyl group having 1 to 12 carbon atoms, Is more preferably an alkyl group of 1 to 6. The counter ion of the quaternary ammonium group is preferably a halide ion. The linking group that connects the amino group or quaternary ammonium group to the main chain of the polymer is a divalent group selected from -CO-, -NH-, -O-, an alkylene group, an arylene group, and combinations thereof. Preferably there is. When the polymer having a crosslinked anionic group contains a repeating unit having an amino group or a quaternary ammonium group, the ratio is preferably 0.06 to 32% by mass, and 0.08 to 30% by mass. It is more preferable that it is 0.1 to 28% by mass.

2- (3) Fluorine-containing polymer binder Among the polymer binders in the present invention, a fluorine-containing copolymer compound can be preferably used particularly for the low refractive index layer.
Examples of the fluorine-containing vinyl monomer include fluoroolefins (for example, fluoroethylene, vinylidene fluoride, tetrafluoroethylene, hexafluoropropylene, etc.), (meth) acrylic acid moieties or fully fluorinated alkyl ester derivatives (for example, biscoat 6FM (trade name) , Osaka Organic Chemical Co., Ltd.) and R-2020 (trade name, manufactured by Daikin Co., Ltd.), fully or partially fluorinated vinyl ethers, and the like. Preferred are perfluoroolefins, refractive index, solubility, and transparency. From the viewpoint of availability, hexafluoropropylene is particularly preferable. Increasing the composition ratio of these fluorinated vinyl monomers can lower the refractive index but lowers the film strength. In the present invention, the fluorine-containing vinyl monomer is preferably introduced so that the fluorine content of the copolymer is 20 to 60% by mass, more preferably 25 to 55% by mass, and particularly preferably 30 to 50%. This is a case of mass%.

Examples of the structural unit for imparting crosslinking reactivity include units represented by the following (A), (B), and (C).
(A): 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 and glycidyl vinyl ether,
(B): a monomer having a carboxyl group, a hydroxy group, an amino group, a sulfo group, etc. (for example, (meth) acrylic acid, methylol (meth) acrylate, hydroxyalkyl (meth) acrylate, allyl acrylate, hydroxyethyl vinyl ether, hydroxybutyl vinyl ether) , Maleic acid, crotonic acid, etc.)
(C): a group having a crosslinkable functional group separately from a group that reacts with the functional group of (A) or (B) in the molecule and a structural unit of (A) or (B) above. Examples of the structural unit to be obtained include (for example, a structural unit that can be synthesized by a technique such as allowing acrylic acid chloride to act on a hydroxyl group).

  In the structural unit (C), the crosslinkable functional group is preferably a photopolymerizable group. Examples of the photopolymerizable group include (meth) acryloyl group, alkenyl group, cinnamoyl group, cinnamylideneacetyl group, benzalacetophenone group, styrylpyridine group, α-phenylmaleimide group, phenylazide group, sulfonylazide. Group, carbonyl azide group, diazo group, o-quinonediazide group, furylacryloyl group, coumarin group, pyrone group, anthracene group, benzophenone group, stilbene group, dithiocarbamate group, xanthate group, 1,2,3-thiadiazole group, cyclo A propene group, an azadioxabicyclo group, etc. can be mentioned, These may be not only 1 type but 2 or more types. Of these, a (meth) acryloyl group and a cinnamoyl group are preferable, and a (meth) acryloyl group is particularly preferable.

Specific methods for preparing the photopolymerizable group-containing copolymer include, but are not limited to, the following methods.
a. A method of esterifying by reacting a (meth) acrylic acid chloride with a crosslinkable functional group-containing copolymer containing a hydroxyl group,
b. A method of urethanization by reacting an isocyanate group-containing (meth) acrylic ester with a crosslinkable functional group-containing copolymer containing a hydroxyl group,
c. A method of reacting (meth) acrylic acid with a crosslinkable functional group-containing copolymer containing an epoxy group,
d. A method in which a crosslinkable functional group-containing copolymer containing a carboxyl group is reacted with a containing (meth) acrylic acid ester containing an epoxy group for esterification.
The amount of the photopolymerizable group introduced can be arbitrarily adjusted. From the viewpoints of surface stability of the coating film, reduction of surface failure when coexisting with inorganic particles, and improvement of film strength, carboxyl groups, hydroxyl groups, etc. It is also preferable to leave a certain amount.

  In the copolymer useful for the present invention, in addition to the repeating unit derived from the above-mentioned fluorine-containing vinyl monomer and the repeating unit having a (meth) acryloyl group in the side chain, it contributes to adhesion to the substrate and Tg of the polymer (film hardness). And other vinyl monomers can be copolymerized as appropriate from various viewpoints such as solubility in a solvent, transparency, slipperiness, dust resistance and antifouling properties. A plurality of these vinyl monomers may be combined depending on the purpose, and are preferably introduced in the range of 0 to 65 mol% in the copolymer in total, and in the range of 0 to 40 mol%. More preferably, it is particularly preferably in the range of 0 to 30 mol%.

  The vinyl monomer unit that can be used in combination is not particularly limited. For example, olefins (ethylene, propylene, isoprene, vinyl chloride, vinylidene chloride, etc.), acrylic esters (methyl acrylate, methyl acrylate, ethyl acrylate, acrylic acid) 2-ethylhexyl, 2-hydroxyethyl acrylate), methacrylic acid esters (methyl methacrylate, ethyl methacrylate, butyl methacrylate, 2-hydroxyethyl methacrylate, etc.), styrene derivatives (styrene, p-hydroxymethylstyrene, p -Methoxystyrene, etc.), vinyl ethers (methyl vinyl ether, ethyl vinyl ether, cyclohexyl vinyl ether, hydroxyethyl vinyl ether, hydroxybutyl vinyl ether, etc.), vinyl esters (vinyl acetate) Vinyl propionate, vinyl cinnamate, etc.), unsaturated carboxylic acids (acrylic acid, methacrylic acid, crotonic acid, maleic acid, itaconic acid, etc.), acrylamides (N, N-dimethylacrylamide, N-tert-butylacrylamide, N -Cyclohexyl acrylamide, etc.), methacrylamides (N, N-dimethylmethacrylamide), acrylonitrile and the like.

  The fluorine-containing polymer particularly useful in the present invention is a random copolymer of perfluoroolefin and vinyl ethers or vinyl esters. In particular, it preferably has a group capable of undergoing a crosslinking reaction alone (a radical reactive group such as a (meth) acryloyl group, a ring-opening polymerizable group such as an epoxy group or an oxetanyl group). These crosslinkable group-containing polymerized units preferably occupy 5 to 70 mol% of the total polymerized units of the polymer, particularly preferably 30 to 60 mol%. Regarding preferred polymers, JP-A-2002-243907, JP-A-2002-372601, JP-A-2003-26732, JP-A-2003-222702, JP-A-2003-294911, JP-A-2003-329804, JP-A-2004. -4444 and JP, 2004-45462, A can be mentioned.

  Moreover, it is preferable that the polysiloxane structure is introduce | transduced in the fluorine-containing polymer of this invention in order to provide antifouling property. There is no limitation on the method of introducing the polysiloxane structure, but for example, as described in JP-A-6-93100, JP-A-11-189621, JP-A-11-228631, and JP-A-2000-313709, the initiation of silicone macroazo A method of introducing a polysiloxane block copolymer component using an agent, and a method of introducing a polysiloxane graft copolymer component using a silicone macromer as described in JP-A-2-251555 and JP-A-2-308806. preferable. Particularly preferred compounds include the polymers of Examples 1, 2, and 3 of JP-A-11-189621, and the copolymers A-2 and A-3 of JP-A-2-251555. These polysiloxane components are preferably 0.5 to 10% by mass in the polymer, and particularly preferably 1 to 5% by mass.

  The preferred molecular weight of the polymer that can be preferably used in the present invention is a mass average molecular weight of 5,000 or more, preferably 10,000 to 500,000, most preferably 15,000 to 200,000. By using polymers having different average molecular weights in combination, it is possible to improve the surface state of the coating film and the scratch resistance.

  As described in JP-A-10-25388 and JP-A-2000-17028, a curing agent having a polymerizable unsaturated group may be used in combination with the above polymer. Moreover, combined use with the compound which has a fluorine-containing polyfunctional polymerizable unsaturated group as described in Unexamined-Japanese-Patent No. 2002-145952 is also preferable. Examples of the compound having a polyfunctional polymerizable unsaturated group include the polyfunctional monomers described in the monomer binder 2- (1). These compounds are particularly preferred because they have a large combined effect for improving scratch resistance, particularly when a compound having a polymerizable unsaturated group is used in the polymer body.

2- (4) Organosilane compound At least one of the layers constituting the film of the present invention contains at least one of hydrolyzate of organosilane compound and / or partial condensate thereof in the coating solution forming the layer. It is preferable from the viewpoint of scratch resistance that it contains a kind of component, a so-called sol component (hereinafter sometimes referred to as such).
In particular, in an antireflection film, it is particularly preferable that both the low refractive index layer and the hard coat layer contain a sol component in order to achieve both antireflection performance and scratch resistance. This sol component is condensed by a drying and heating process after coating the coating solution to form a cured product and becomes a part of the binder of the above layer. Moreover, when this hardened | cured material has a polymerizable unsaturated bond, the binder which has a three-dimensional structure is formed by irradiation of actinic light.

The organosilane compound is preferably one represented by the following general formula 1.
General formula 1: (R < ¹ >) _m- Si (X) _4-m
In the general formula 1, R ¹ represents a substituted or unsubstituted alkyl group or a substituted or unsubstituted aryl group. As an alkyl group, a C1-C30 alkyl group is preferable, More preferably, it is C1-C16, Most preferably, it is a C1-C6 thing. Specific examples of the alkyl group include methyl, ethyl, propyl, isopropyl, hexyl, decyl, hexadecyl and the like. Examples of the aryl group include phenyl and naphthyl, and a phenyl group is preferable.
X represents a hydroxyl group or a hydrolyzable group, for example, an alkoxy group (preferably an alkoxy group having 1 to 5 carbon atoms, such as a methoxy group or an ethoxy group), a halogen atom (for example, Cl, Br, I or the like). ) And R ² COO (R ² is preferably a hydrogen atom or an alkyl group having 1 to 6 carbon atoms. Examples include CH ₃ COO, C ₂ H ₅ COO, etc.), preferably An alkoxy group, particularly preferably a methoxy group or an ethoxy group.
m represents an integer of 1 to 3, and preferably 1 or 2.

When there are a plurality of Xs, the plurality of Xs may be the same or different.
The substituent contained in R ¹ is not particularly limited, but a halogen atom (fluorine, chlorine, bromine, etc.), hydroxyl group, mercapto group, carboxyl group, epoxy group, alkyl group (methyl, ethyl, i-propyl, propyl, t-butyl etc.), aryl groups (phenyl, naphthyl etc.), aromatic heterocyclic groups (furyl, pyrazolyl, pyridyl etc.), alkoxy groups (methoxy, ethoxy, i-propoxy, hexyloxy etc.), aryloxy (phenoxy etc.) ), Alkylthio groups (methylthio, ethylthio, etc.), arylthio groups (phenylthio, etc.), alkenyl groups (vinyl, 1-propenyl, etc.), acyloxy groups (acetoxy, acryloyloxy, methacryloyloxy, etc.), alkoxycarbonyl groups (methoxycarbonyl, ethoxy) Carbonyl, etc.), aryloxy Carbonyl groups (phenoxycarbonyl, etc.), carbamoyl groups (carbamoyl, N-methylcarbamoyl, N, N-dimethylcarbamoyl, N-methyl-N-octylcarbamoyl, etc.), acylamino groups (acetylamino, benzoylamino, acrylicamino, methacrylamino) Etc.), and these substituents may be further substituted.
When there are a plurality of R ^{10 s} , at least one is preferably a substituted alkyl group or a substituted aryl group. Among these, the substituted alkyl group or substituted aryl group preferably further has a vinyl polymerizable group. In this case, the compound represented by the general formula 1 has a vinyl polymerizable substituent represented by the following general formula 2. It can be expressed as an organosilane compound.

In the above general formula 2, R ₂ represents a hydrogen atom, a methyl group, a methoxy group, an alkoxycarbonyl group, a cyano group, a fluorine atom, or a chlorine atom. Examples of the alkoxycarbonyl group include a methoxycarbonyl group and an ethoxycarbonyl group. A hydrogen atom, a methyl group, a methoxy group, a methoxycarbonyl group, a cyano group, a fluorine atom, and a chlorine atom are preferable, a hydrogen atom, a methyl group, a methoxycarbonyl group, a fluorine atom, and a chlorine atom are more preferable, and a hydrogen atom and a methyl group Is particularly preferred.
Y represents a single bond or * -COO-**, * -CONH-** or * -O-**, preferably a single bond, * -COO-** or * -CONH-**, * -COO-** is more preferable, and * -COO-** is particularly preferable. * Represents a position bonded to ═C (R ₂ ) —, and ** represents a position bonded to L.

  L represents a divalent linking chain. Specifically, a substituted or unsubstituted alkylene group, a substituted or unsubstituted arylene group, a substituted or unsubstituted alkylene group having a linking group (for example, ether, ester, amide, etc.) therein, and a linking group ( For example, a substituted or unsubstituted arylene group having an ether, an ester, an amide, etc.) is preferable. A substituted or unsubstituted alkylene group, a substituted or unsubstituted arylene group, and an alkylene group having a linking group therein are preferred. A substituted alkylene group, an unsubstituted arylene group, and an alkylene group having an ether or ester linking group therein are more preferred, and an unsubstituted alkylene group and an alkylene group having an ether or ester linking group inside are particularly preferred. Examples of the substituent include a halogen, a hydroxyl group, a mercapto group, a carboxyl group, an epoxy group, an alkyl group, and an aryl group, and these substituents may be further substituted.

l (l represents a number satisfying the formula of l = 100-m) and m represent a molar ratio, and m represents a number from 0 to 50. As for m, the number of 0-40 is more preferable, and the number of 0-30 is especially preferable.
R _{3 to} R ₅ are preferably a halogen atom, a hydroxyl group, an unsubstituted alkoxy group, or an unsubstituted alkyl group. R _{3 to} R ₅ are more preferably a chlorine atom, a hydroxyl group, or an unsubstituted alkoxy group having 1 to 6 carbon atoms, more preferably a hydroxyl group or an alkoxy group having 1 to 3 carbon atoms, and particularly preferably a hydroxyl group or a methoxy group.
R ₆ represents a hydrogen atom, an alkyl group, an alkoxy group, an alkoxycarbonyl group, a cyano group, a fluorine atom, or a chlorine atom. Examples of the alkyl group include a methyl group and an ethyl group. Examples of the alkoxy group include a methoxy group, an ethoxy group, and an alkoxycarbonyl group as a methoxycarbonyl group and an ethoxycarbonyl group. A hydrogen atom, a methyl group, a methoxy group, a methoxycarbonyl group, a cyano group, a fluorine atom, and a chlorine atom are preferable, a hydrogen atom, a methyl group, a methoxycarbonyl group, a fluorine atom, and a chlorine atom are more preferable, and a hydrogen atom and a methyl group Is particularly preferred.
R ₇ has the same meaning as R _{1 in} formula 1 above, more preferably an unsubstituted alkyl group and an unsubstituted aryl group, still more preferably an alkyl group having 1 to 3 carbon atoms, and particularly preferably a methyl group.

  Two or more compounds of the general formula 1 may be used in combination. In particular, the compound of the general formula 2 is synthesized using at least one compound of the general formula 1 as a starting material. Specific examples of the starting materials of the compound represented by Formula 1 and the compound represented by Formula 2 are shown below, but are not limited thereto.

    M-48 Methyltrimethoxysilane

Of these, (M-1), (M-2), and (M-25) are particularly preferable as the organosilane containing a polymerizable group.
In order to obtain the effect of the present invention, the content of the organosilane containing the vinyl polymerizable group in the hydrolyzate of organosilane and / or its partial condensate is preferably 30% by mass to 100% by mass, The mass% is more preferably 100% by mass, and more preferably 70% by mass to 95% by mass. If the content of the organosilane containing the vinyl polymerizable group is less than 30% by mass, the solid content is generated, the liquid becomes cloudy, the pot life is deteriorated, or the molecular weight is difficult to control (increase in the molecular weight). Or because the content of the polymerizable group is small, it is difficult to improve the performance (for example, the scratch resistance of the antireflection film) when the polymerization treatment is performed. When synthesizing the compound represented by the general formula 2, (M-1) and (M-2) as the organosilane containing the vinyl polymerizable group, (MM) as the organosilane having no vinyl polymerizable group. It is preferable to use one of each of −19) to (M-21) and (M-48) in combination with the above amounts.

  It is preferable to suppress volatility of the hydrolyzate of organosilane of the present invention and / or its partial condensate in order to stabilize the performance of the coated product. Specifically, volatilization per hour at 105 ° C. The amount is preferably 5% by mass or less, more preferably 3% by mass or less, and particularly preferably 1% by mass or less.

The sol component used in the present invention is prepared by hydrolysis and / or partial condensation of the organosilane.
In the hydrolysis condensation reaction, 0.05 to 2.0 mol, preferably 0.1 to 1.0 mol of water is added to 1 mol of the hydrolyzable group (X), and the presence of the catalyst used in the present invention is present. Under stirring at 25-100 ° C.

In at least one of the hydrolyzate of organosilane and the partial condensate thereof according to the present invention, the weight average molecular weight of either the hydrolyzate of organosilane containing a vinyl polymerizable group or the partial condensate thereof is less than 300. When this component is removed, 450 to 20000 is preferable, 500 to 10,000 is more preferable, 550 to 5000 is still more preferable, and 600 to 3000 is still more preferable.
Of the components having a molecular weight of 300 or more in the hydrolyzate of organosilane and / or its partial condensate, the component having a molecular weight of more than 20000 is preferably 10% by mass or less, more preferably 5% by mass or less. More preferably, it is 3 mass% or less. When it contains more than 10% by mass, a cured film obtained by curing such a curable composition containing a hydrolyzate of organosilane and / or a partial condensate thereof has transparency and adhesion to the substrate. May be inferior.

Here, the weight average molecular weight and molecular weight were converted to polystyrene by GTH analyzer using a column of TSKgel GMHxL, TSKgel G4000HxL, TSKgel G2000HxL (both trade names manufactured by Tosoh Corporation), and solvent THF and differential refractometer detection. The content is the area% of the peak in the molecular weight range when the peak area of the component having a molecular weight of 300 or more is defined as 100%.
The dispersity (weight average molecule / number average molecular weight) is preferably 3.0 to 1.1, more preferably 2.5 to 1.1, still more preferably 2.0 to 1.1, and 1.5 to 1. 1 is particularly preferred.

The ²⁹ Si-NMR analysis of the hydrolyzate and partial condensate of the organosilane of the present invention can confirm the state in which X in the general formula 1 is condensed in the form of -OSi.
At this time, when three bonds of Si are condensed in the form of -OSi (T3), when two bonds of Si are condensed in the form of -OSi (T2), one bond of Si is- When the condensation is performed in the form of OSi (T1), and the case where Si is not condensed at all (T0), the condensation rate α is expressed by the formula (I): α = (T3 × 3 + T2 × 2 + T1 × 1) / 3 / (T3 + T2 + T1 + T0)
The condensation rate is preferably 0.2 to 0.95, more preferably 0.3 to 0.93, and particularly preferably 0.4 to 0.9.
If it is less than 0.1, hydrolysis and condensation are not sufficient, and monomer components increase, so that curing is not sufficient. If it is greater than 0.95, hydrolysis and condensation proceed too much and hydrolyzable groups are consumed. For this reason, the interaction between the binder polymer, the resin substrate, the inorganic fine particles and the like is lowered, and even if these are used, it is difficult to obtain the effect.

The hydrolyzate and partial condensate of the organosilane compound used in the present invention will be described in detail.
The hydrolysis reaction of organosilane and the subsequent condensation reaction are generally carried out in the presence of a catalyst. Catalysts include inorganic acids such as hydrochloric acid, sulfuric acid and nitric acid; organic acids such as oxalic acid, acetic acid, butyric acid, maleic acid, citric acid, formic acid, methanesulfonic acid and toluenesulfonic acid; sodium hydroxide, potassium hydroxide and ammonia Inorganic bases such as triethylamine, organic bases such as pyridine; metal alkoxides such as triisopropoxyaluminum, tetrabutoxyzirconium, tetrabutyltitanate, dibutyltin dilaurate; and metals such as Zr, Ti or Al as the central metal Metal chelate compounds and the like; Fluorine-containing compounds such as KF and NH ₄ F are mentioned.
The said catalyst may be used independently or may use multiple types together.

The organosilane hydrolysis / condensation reaction can be carried out in the absence of a solvent or in a solvent, but an organic solvent is preferably used in order to mix the components uniformly. For example, alcohols, aromatic hydrocarbons, ethers, Ketones and esters are preferred.
The solvent preferably dissolves the organosilane and the catalyst. In addition, it is preferable in the process that an organic solvent is used as a coating liquid or a part of the coating liquid, and those that do not impair solubility or dispersibility when mixed with other materials such as a fluorine-containing polymer are preferable.

Among these, examples of the alcohols include monohydric alcohols and dihydric alcohols. Among these, monohydric alcohols are preferably saturated aliphatic alcohols having 1 to 8 carbon atoms.
Specific examples of these alcohols include methanol, ethanol, n-propyl alcohol, i-propyl alcohol, n-butyl alcohol, sec-butyl alcohol, tert-butyl alcohol, ethylene glycol, diethylene glycol, triethylene glycol, ethylene glycol. Examples thereof include monobutyl ether and ethylene glycol monoethyl ether acetate.

Specific examples of aromatic hydrocarbons include benzene, toluene, xylene and the like. Specific examples of ethers include tetrahydrofuran and dioxane. Specific examples of ketones include acetone, methyl ethyl ketone, methyl isobutyl ketone, Specific examples of esters such as diisobutyl ketone and cyclohexanone include ethyl acetate, propyl acetate, butyl acetate, and propylene carbonate.
These organic solvents can be used alone or in combination of two or more. The concentration of the solid content in the reaction is not particularly limited, but is usually in the range of 1% to 100%.

0.05 to 2 mol, preferably 0.1 to 1 mol, of water is added to 1 mol of hydrolyzable group of organosilane, in the presence or absence of the above solvent, and in the presence of a catalyst. It is carried out by stirring at 25 to 100 ° C.
In the present invention, (wherein, ^{R 3} represents an alkyl group having 1 to 10 carbon atoms) Formula ^R 3 OH alcohol of the general formula ^R 4 COCH ₂ COR ⁵ (formula represented by, ^{R 4} is carbon From Zr, Ti, or Al having a ligand represented by a compound represented by an alkyl group having 1 to 10 carbon atoms, R ⁵ represents an alkyl group having 1 to 10 carbon atoms or an alkoxy group having 1 to 10 carbon atoms) It is preferable to perform hydrolysis by stirring at 25 to 100 ° C. in the presence of at least one metal chelate compound having a selected metal as a central metal.
Alternatively, when a fluorine-containing compound is used as a catalyst, the degree of polymerization can be determined by selecting the amount of water to be added and the molecular weight can be set arbitrarily because the fluorine-containing compound has the ability to completely proceed with hydrolysis and condensation. Therefore, it is preferable. That is, in order to adjust the organosilane hydrolyzate / partial condensate having an average degree of polymerization M, (M-1) mol of water may be used with respect to M mol of hydrolyzable organosilane.

Metal chelate compounds (wherein, ^{R 3} represents an alkyl group having 1 to 10 carbon atoms) Formula ^R 3 OH alcohol and ^R 4 COCH ₂ COR ⁵ (wherein represented by, ^{R 4} is C 1 -C To 10 alkyl groups, R ⁵ represents an alkyl group having 1 to 10 carbon atoms or an alkoxy group having 1 to 10 carbon atoms), and is selected from Zr, Ti, and Al. Any metal having a metal as a central metal can be suitably used without particular limitation. Within this category, two or more metal chelate compounds may be used in combination. The metal chelate compound used in the present invention has a general formula of Zr (OR ³ ) _p1 (R ⁴ COCHCOR ⁵ ) _p2 , Ti (OR ³ ) _q1 (R ⁴ COCHCOR ⁵ ) _q2 , and Al (OR ³ ) _r1 (R ⁴ Those selected from the group of compounds represented by COCHCOR ⁵ ) _r2 are preferred, and they serve to promote the condensation reaction of the hydrolyzate and partial condensate of the organosilane compound.
R ³ and R ⁴ in the metal chelate compound may be the same or different and each is an alkyl group having 1 to 10 carbon atoms, specifically an ethyl group, n-propyl group, i-propyl group, n-butyl group, sec -Butyl group, t-butyl group, n-pentyl group, phenyl group and the like. R ⁵ represents an alkyl group having 1 to 10 carbon atoms as described above, or an alkoxy group having 1 to 10 carbon atoms such as a methoxy group, an ethoxy group, an n-propoxy group, an i-propoxy group, and n-butoxy. Group, sec-butoxy group, t-butoxy group and the like. Moreover, p1, p2, q1, q2, r1, and r2 in the metal chelate compound represent integers determined so as to be p1 + p2 = 4, q1 + q2 = 4, and r1 + r2 = 3, respectively.

Specific examples of these metal chelate compounds include tri-n-butoxyethylacetoacetate zirconium, di-n-butoxybis (ethylacetoacetate) zirconium, n-butoxytris (ethylacetoacetate) zirconium, tetrakis (n-propylacetate). Zirconium chelate compounds such as acetate) zirconium, tetrakis (acetylacetoacetate) zirconium, tetrakis (ethylacetoacetate) zirconium; diisopropoxy bis (ethylacetoacetate) titanium, diisopropoxy bis (acetylacetate) titanium, diiso Titanium chelate compounds such as propoxy bis (acetylacetone) titanium; diisopropoxyethyl acetoacetate aluminum, diisopropyl Poxyacetylacetonate aluminum, isopropoxybis (ethylacetoacetate) aluminum, isopropoxybis (acetylacetonate) aluminum, tris (ethylacetoacetate) aluminum, tris (acetylacetonate) aluminum, monoacetylacetonate bis (ethyl) An aluminum chelate compound such as acetoacetate) aluminum.
Among these metal chelate compounds, tri-n-butoxyethyl acetoacetate zirconium, diisopropoxybis (acetylacetonate) titanium, diisopropoxyethyl acetoacetate aluminum, and tris (ethyl acetoacetate) aluminum are preferable. These metal chelate compounds can be used individually by 1 type or in mixture of 2 or more types. Moreover, the partial hydrolyzate of these metal chelate compounds can also be used.

  The metal chelate compound is preferably used in a proportion of 0.01 to 50% by mass, more preferably 0.1 to 50% by mass, and still more preferably 0.5 to 10% by mass with respect to the organosilane compound. When the metal chelate compound is used within the above range, the condensation reaction of the organosilane compound is fast, the durability of the coating film is good, and the hydrolyzate and partial condensate of the organosilane compound and the metal chelate compound are contained. The storage stability of the composition is good.

In addition to the composition containing the sol component and the metal chelate compound, at least one of a β-diketone compound and a β-ketoester compound is preferably added to the coating solution used in the present invention. This will be further described below.
In the present invention, at least one of a β-diketone compound and a β-ketoester compound represented by the general formula R ⁴ COCH ₂ COR ⁵ is used as a stability improver for the composition used in the present invention. It works. That is, by coordinating with a metal atom in the metal chelate compound (a compound of at least one of zirconium, titanium and aluminum compounds), condensation of hydrolyzate and partial condensate of organosilane compound by these metal chelate compounds It is considered that the action of accelerating the reaction is suppressed and the action of improving the storage stability of the resulting composition is achieved. R ⁴ and R ⁵ constituting the β- diketone compound and β- ketoester compound are the same as R ⁴ and R ⁵ constituting the metal chelate compound.

  Specific examples of the β-diketone compound and β-ketoester compound include acetylacetone, methyl acetoacetate, ethyl acetoacetate, acetoacetate-n-propyl, acetoacetate-i-propyl, acetoacetate-n-butyl, acetoacetate- sec-butyl, acetoacetate-t-butyl, 2,4-hexane-dione, 2,4-heptane-dione, 3,5-heptane-dione, 2,4-octane-dione, 2,4-nonane-dione , 5-methyl-hexane-dione and the like. Of these, ethyl acetoacetate and acetylacetone are preferred, and acetylacetone is particularly preferred. These β-diketone compounds and β-ketoester compounds can be used alone or in admixture of two or more. In the present invention, the β-diketone compound and the β-ketoester compound are preferably used in an amount of 2 mol or more, more preferably 3 to 20 mol, per 1 mol of the metal chelate compound. If it is less than 2 mol, the storage stability of the resulting composition may be inferior, which is not preferable.

  The content of the hydrolyzate and partial condensate of the organosilane compound is preferably small in the case of a relatively thin antireflection layer and large in the case of a thick hard coat layer or antiglare layer. The content is preferably 0.1 to 50% by mass, and preferably 0.5 to 30% by mass based on the total solid content of the containing layer (added layer), considering the effect, refractive index, film shape / surface shape, and the like. More preferably, 1 to 15% by mass is most preferable.

2- (5) Initiator Polymerization of monomers having various ethylenically unsaturated groups can be performed by irradiation with ionizing radiation or heating in the presence of a photoradical initiator or a thermal radical initiator.
In producing the film of the present invention, a photopolymerization initiator (photoinitiator) or a thermal polymerization initiator (thermal initiator) can be used in combination.

<Photoinitiator>
Examples of photo radical polymerization initiators 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 acetophenones include 2,2-dimethoxyacetophenone, 2,2-diethoxyacetophenone, p-dimethylacetophenone, 1-hydroxy-dimethylphenylketone, 1-hydroxy-dimethyl-p-isopropylphenylketone, 1-hydroxy Cyclohexyl phenyl ketone, 2-methyl-4-methylthio-2-morpholinopropiophenone, 2-benzyl-2-dimethylamino-1- (4-morpholinophenyl) -butanone, 4-phenoxydichloroacetophenone, 4-t- Butyl-dichloroacetophenone is included.

Examples of 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 It is.
Examples of benzophenones include benzophenone, hydroxybenzophenone, 4-benzoyl-4'-methyldiphenyl sulfide, 2,4-dichlorobenzophenone, 4,4-dichlorobenzophenone and p-chlorobenzophenone, 4,4'-dimethylaminobenzophenone (Michler's 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 Kunz, Martin “Rad Tech'98. Proceeding April 19-22, 1998, Chicago”. And the organic borate compounds described. For example, the compounds described in JP-A-2002-116539, paragraph numbers [0022] to [0027] can be mentioned. Examples of 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 include organoboron transition metal coordination complexes and the like, and specific examples include ion complexes with cationic dyes.

Examples of phosphine oxides include 2,4,6-trimethylbenzoyldiphenylphosphine oxide.
Examples of 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 2000-80068 are particularly preferable.
Examples of the onium salts include aromatic diazonium salts, aromatic iodonium salts, and aromatic sulfonium salts.

Specific examples of the active halogens include Wakabayashi et al., “Bull Chem. Soc Japan” 42, 2924 (1969), US Pat. No. 3,905,815, JP-A-5-27830, 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 preferred are s-triazine derivatives in which at least one mono-, di- or trihalogen-substituted methyl group is bonded to the s-triazine ring. Specific examples include S-triazine and oxathiazole compounds, such as 2- (p-methoxyphenyl) -4,6-bis (trichloromethyl) -s-triazine, 2- (p-methoxyphenyl). -4,6-bis (trichloromethyl) -s-triazine, 2- (p-styrylphenyl) -4,6-bis (trichloromethyl) -s-triazine, 2- (3-Br-4-di (ethyl) Acetate) amino) phenyl) -4,6-bis (trichloromethyl) -s-triazine, 2-trihalomethyl-5- (p-methoxyphenyl) -1,3,4-oxadiazole. Specifically, p.14 to p30 in JP-A-58-15503, p6-p10 in JP-A-55-77742, and p287 in JP-B-60-27673. 1-No. 8, No. pp. 443 to p444 of JP-A-60-239736. 1-No. 17, No. 4,701,399. Compounds such as 1-19 are particularly preferred.
Examples of inorganic complexes include bis (η ⁵ -2,4-cyclopentadien-1-yl) -bis (2,6-difluoro-3- (1H-pyrrol-1-yl) -phenyl) titanium.
Examples of coumarins include 3-ketocoumarin.

These initiators may be used alone or in combination.
“Latest UV Curing Technology”, Technical Information Association, 1991, p. 159, and “UV curing system” written by Kayo Kiyomi, 1989, General Technology Center, p. Various examples are also described in 65-148 and are useful in the present invention.

  Commercially available radical photopolymerization initiators include KAYACURE (DETX-S, BP-100, BDKM, 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, Ltd., Esacure (KIP100F, KB1, manufactured by Sartomer) EB3, BP, X33, KT046, KT37, KIP150, TZT) and the like and combinations thereof are preferred examples.

  It is preferable to use a photoinitiator in the range of 0.1-15 mass parts with respect to 100 mass parts of polyfunctional monomers, More preferably, it is the range of 1-10 mass parts.

<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.

<Thermal initiator>
As the thermal radical initiator, organic or inorganic peroxides, organic azo, diazo compounds, and the like can be used.
Specifically, benzoyl peroxide, halogen benzoyl peroxide, lauroyl peroxide, acetyl peroxide, dibutyl peroxide, cumene hydroperoxide, butyl hydroperoxide as organic peroxides, hydrogen peroxide, peroxides as inorganic peroxides. Diazo compounds such as ammonium sulfate, potassium persulfate and the like, 2,2′-azobis (isobutyronitrile), 2,2′-azobis (propionitrile), 1,1′-azobis (cyclohexanecarbonitrile), etc. And diazoaminobenzene, p-nitrobenzenediazonium and the like.

2- (6) Crosslinkable compound When the monomer or polymer binder constituting the present invention alone does not have sufficient curability, the necessary curability can be imparted by blending the crosslinkable compound. it can.
For example, when the polymer body contains a hydroxyl group, various amino compounds are preferably used as the curing agent. The amino compound used as the crosslinkable compound is, for example, a compound containing a total of two or more of any one or both of a hydroxyalkylamino group and an alkoxyalkylamino group. Specifically, for example, a melamine compound, Examples include urea compounds, benzoguanamine compounds, glycoluril compounds, and the like.

  Melamine compounds are generally known as compounds having a skeleton in which a nitrogen atom is bonded to a triazine ring, and specific examples include melamine, alkylated melamine, methylol melamine, alkoxylated methyl melamine, and the like. However, it is preferable to have one or both of a methylol group and an alkoxylated methyl group in one molecule in total. Specifically, methylolated melamine, alkoxylated methylmelamine, or a derivative thereof obtained by reacting melamine and formaldehyde under basic conditions is preferable, and good storage stability is obtained particularly for the curable resin composition. Alkoxylated methyl melamine is preferable in that it can be obtained and good reactivity can be obtained. There are no particular restrictions on the methylolated melamine and the alkoxylated methylmelamine used as the crosslinkable compound. For example, the methylolated melamine and the alkoxylated methylmelamine can be obtained by the method described in the document “Plastic Materials Course [8] Urea Melamine Resin” (Nikkan Kogyo Shimbun). Various resinous materials can be used.

  In addition to urea, examples of the urea compound include polymethylolated urea, alkoxylated methylurea which is a derivative thereof, methylolated uron having a uron ring, and alkoxylated methyluron. And also about compounds, such as a urea derivative, the use of the various resinous materials described in said literature is possible.

2- (7) Curing Catalyst In the film of the present invention, radicals and acids generated by irradiation with ionizing radiation or heat can be used as a curing catalyst for promoting curing.

<Heat acid generator>
Specific examples of the thermal acid generator include various aliphatic sulfonic acids and salts thereof, various aliphatic carboxylic acids and salts thereof such as citric acid, acetic acid and maleic acid, and various aromatic carboxylic acids such as benzoic acid and phthalic acid. Examples thereof include acids and salts thereof, alkylbenzenesulfonic acids and ammonium salts thereof, amine salts, various metal salts, phosphoric acid and phosphoric acid esters of organic acids, and the like.
Examples of commercially available materials include catalyst 4040, catalyst 4050, catalyst 600, catalyst 602, catalyst 500, catalyst 296-9, and more made by Nippon Cytec Industries, Inc., and NACURE series 155, 1051, 5076, 4054J and its block type NACURE series 2500, 5225, X49-110, 3525, 4167 or more manufactured by King Corporation, and the like.
The use ratio of the thermal acid generator is preferably 0.01 to 10 parts by weight, more preferably 0.1 to 5 parts by weight with respect to 100 parts by weight of the curable resin composition. When the addition amount is within this range, the storage stability of the curable resin composition is good and the scratch resistance of the coating film is also good.

<Photosensitive acid generator, photoacid generator>
Furthermore, the photo-acid generator which can be used as a photoinitiator is explained in full detail.
Examples of the acid generator include a photoinitiator for photocationic polymerization, a photodecolorant for dyes, a photochromic agent, a known acid generator used in a microresist, and the like, a known compound, and a mixture thereof. Is mentioned. Examples of the acid generator include organic halogenated compounds, disulfone compounds, onium compounds, etc. Among these, specific examples of organic halogen compounds and disulfone compounds are the same as those described for the compound that generates radicals. Things.
Examples of the photosensitive acid generator include (1) various onium salts such as iodonium salts, sulfonium salts, phosphonium salts, diazonium salts, ammonium salts, pyridinium salts; (2) β-ketoesters, β-sulfonylsulfones and these. sulfone compounds such as α-diazo compounds; (3) sulfonic acid esters such as alkyl sulfonic acid esters, haloalkyl sulfonic acid esters, aryl sulfonic acid esters, and imino sulfonates; (4) sulfonimide compounds; and (5) diazomethane compounds. Can be mentioned.
Examples of the onium compounds include diazonium salts, ammonium salts, iminium salts, phosphonium salts, iodonium salts, sulfonium salts, arsonium salts, and selenonium salts. Of these, diazonium salts, iodonium salts, sulfonium salts, and iminium salts are preferable from the viewpoint of photosensitivity at the start of photopolymerization, material stability of the compound, and the like. Examples thereof include compounds described in paragraph numbers [0058] to [0059] of JP-A-2002-29162.

The use ratio of the photosensitive acid generator is preferably 0.01 to 10 parts by weight, more preferably 0.1 to 5 parts by weight with respect to 100 parts by weight of the curable resin composition.
In addition, as specific compounds and methods of use, for example, the contents described in JP-A-2005-43876 can be used.

2- (8) Translucent Particles Various translucent particles are used for imparting antiglare properties (surface scattering properties) and internal scattering properties to the film of the present invention, particularly the antiglare layer and the hard coat layer. I can do it.

The translucent particles may be organic particles or inorganic particles. As the particle size is not varied, the scattering characteristics are less varied, and the design of the haze value is facilitated. As the translucent particles, plastic beads are preferable, and those having particularly high transparency and a difference in refractive index with the binder are preferable.
As organic particles, polymethyl methacrylate particles (refractive index 1.49), crosslinked poly (acryl-styrene) copolymer particles (refractive index 1.54), melamine resin particles (refractive index 1.57), polycarbonate particles ( Refractive index 1.57), polystyrene particles (refractive index 1.60), crosslinked polystyrene particles (refractive index 1.61), polyvinyl chloride particles (refractive index 1.60), benzoguanamine-melamine formaldehyde particles (refractive index 1. 68) etc. are used.
Examples of the inorganic particles include silica particles (refractive index: 1.44), alumina particles (refractive index: 1.63), zirconia particles, titania particles, and inorganic particles having hollows and pores.

Of these, cross-linked polystyrene particles, cross-linked poly ((meth) acrylate) particles, and cross-linked poly (acryl-styrene) particles are preferably used, and a binder is selected according to the refractive index of each light-transmitting particle selected from these particles. By adjusting the refractive index, the internal haze, surface haze, and centerline average roughness of the present invention can be achieved.
Furthermore, a binder (having a refractive index of 1.50 to 1.53 after curing) containing a tri- or higher functional (meth) acrylate monomer as a main component and a crosslinked poly (meth) acrylate weight having an acrylic content of 50 to 100 weight percent. It is preferable to use a combination of translucent particles composed of a combination, and in particular, a combination of a binder and translucent particles composed of a crosslinked poly (styrene-acrylic) copolymer (with a refractive index of 1.48 to 1.54). preferable.

In the present invention, the refractive index of the binder and the translucent particles is preferably 1.45 to 1.70, more preferably 1.48 to 1.65. In order to set the refractive index within the above range, the type and amount ratio of the binder and the light-transmitting particles may be appropriately selected. How to select can be easily known experimentally in advance.
In the present invention, the difference in refractive index between the binder and the translucent particles (the refractive index of the translucent particles−the refractive index of the binder) is preferably 0.001 to 0.030 as an absolute value, More preferably, it is 0.001-0.020, More preferably, it is 0.001-0.015. If this difference exceeds 0.030, problems such as film character blur, a decrease in dark room contrast, and surface turbidity occur.

  Here, the refractive index of the binder can be quantitatively evaluated by directly measuring it with an Abbe refractometer or by measuring a spectral reflection spectrum or a spectral ellipsometry. The refractive index of the translucent particles is measured by measuring the turbidity by dispersing an equal amount of the translucent particles in the solvent in which the refractive index is changed by changing the mixing ratio of two types of solvents having different refractive indexes. It is measured by measuring the refractive index of the solvent when the turbidity is minimized with an Abbe refractometer.

  In the case of the above translucent particles, the translucent particles easily settle in the binder, and therefore an inorganic filler such as silica may be added to prevent sedimentation. As the amount of the inorganic filler added increases, it is more effective in preventing the translucent particles from settling, but adversely affects the transparency of the coating film. Therefore, preferably, an inorganic filler having a particle size of 0.5 μm or less is contained in an amount of less than 0.1% by mass so as not to impair the transparency of the coating film with respect to the binder.

  The average particle size of the translucent particles is preferably 0.5 to 10 μm, more preferably 2.0 to 6.0 μm. If the average particle size is less than 0.5 μm, the light scattering angle distribution spreads to a wide angle, which may cause blurring of characters on the display. On the other hand, if it exceeds 10 μm, it is necessary to increase the thickness of the layer to be added, which causes problems such as curling and cost increase.

  Moreover, you may use together and use 2 or more types of translucent particle | grains from which a particle diameter differs. It is possible to impart an antiglare property with a light-transmitting particle having a larger particle diameter, and to reduce the surface roughness with a light-transmitting particle having a smaller particle diameter.

  The said translucent particle | grain is mix | blended so that 3-30 mass% may be contained in the addition layer total solid. More preferably, it is 5-20 mass%. If it is less than 3% by mass, the effect of addition is insufficient, and if it exceeds 30% by mass, problems such as image blur, surface turbidity and glare occur.

Moreover, the density of the translucent particles is preferably 10 to 1000 mg / m ² , more preferably 100 to 700 mg / m ² .

<Translucent particle preparation, classification method>

  Examples of the method for producing translucent particles according to the present invention include suspension polymerization, emulsion polymerization, soap-free emulsion polymerization, dispersion polymerization, seed polymerization, and the like. Good. These production methods are described in, for example, “Experimental Methods for Polymer Synthesis” (Takayuki Otsu and Masaaki Kinoshita, Chemical Dojinsha), pages 130 and 146 to 147, “Synthetic Polymers”, Vol. 246-290, 3rd volume, p. 1 to 108, etc., and Japanese Patent Nos. 2543503, 3508304, 2746275, 3521560, 3580320, and Japanese Patent Laid-Open No. 10-1561. Reference can be made to methods described in JP-A No. 7-2908, JP-A No. 5-297506, JP-A No. 2002-145919, and the like.

The particle size distribution of the translucent particles is preferably monodisperse particles in terms of haze value and control 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 the coarse particles is preferably 1% or less of the total number of particles, more preferably 0.1% or less. Yes, more preferably 0.01% or less. Particles having such a particle size distribution are also effective means of classification after preparation or synthesis reaction, and particles having a desired distribution can be obtained by increasing the number of classifications or increasing the degree of classification. .
It is preferable to use a method such as an air classification method, a centrifugal classification method, a sedimentation classification method, a filtration classification method, or an electrostatic classification method for classification.

2- (9) Inorganic particles Various inorganic particles can be used in the present invention in order to improve physical properties such as hardness, optical properties such as reflectance, and scattering properties.
As the inorganic particles, an oxide of at least one metal selected from silicon, zirconium, titanium, aluminum, indium, zinc, tin, and antimony, specific examples include ZrO ₂ , TiO ₂ , Al ₂ O ₃ , In ₂ O ₃ , ZnO, SnO ₂ , Sb ₂ O ₃ , ITO and the like can be mentioned. In addition, BaSO ₄ , CaCO ₃ , talc and kaolin are included.

  The particle diameter of the inorganic particles used in the present invention is preferably as fine as possible in the dispersion medium, and the weight average diameter is 1 to 200 nm. Preferably it is 5-150 nm, More preferably, it is 10-100 nm, Most preferably, it is 10-80 nm. A film that does not impair the transparency can be formed by refining the inorganic particles to 100 nm or less. The particle diameter of the inorganic particles can be measured by a light scattering method or an electron micrograph.

The specific surface area of the inorganic particles is preferably from 10 to 400 m ² / g, more preferably from 20 to 200 m ² / g, and most preferably from 30 to 150 m ² / g.

The inorganic particles used in the present invention are preferably added to a coating solution for a layer used as a dispersion in a dispersion medium.
As the dispersion medium for the inorganic particles, a liquid having a boiling point of 60 to 170 ° C. is preferably used. Examples of dispersion media include water, alcohol (eg, methanol, ethanol, isopropanol, butanol, benzyl alcohol), ketone (eg, acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone), ester (eg, methyl acetate, ethyl acetate, Propyl acetate, butyl acetate, methyl formate, ethyl formate, propyl formate, butyl formate), aliphatic hydrocarbons (eg, hexane, cyclohexane), halogenated hydrocarbons (eg, methylene chloride, chloroform, carbon tetrachloride), aromatic Hydrocarbon (eg, benzene, toluene, xylene), amide (eg, dimethylformamide, dimethylacetamide, n-methylpyrrolidone), ether (eg, diethyl ether, dioxane, tetrahydrofuran), ether alcohol (eg, 1-methoate) Shi-2-propanol) are included. Toluene, xylene, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone and butanol are particularly preferred.
Particularly preferred dispersion media are methyl ethyl ketone, methyl isobutyl ketone, and cyclohexanone.

  The inorganic particles are dispersed using a disperser. Examples of dispersers include sand grinder mills (eg, pinned bead mills), high speed impeller mills, pebble mills, roller mills, attritors and colloid mills. A sand grinder mill and a high-speed impeller mill are particularly preferred. Further, preliminary dispersion processing may be performed. Examples of the disperser used for the preliminary dispersion treatment include a ball mill, a three-roll mill, a kneader, and an extruder.

<High refractive index particles>
For the purpose of increasing the refractive index of the layer constituting the present invention, a cured product of a composition in which inorganic particles having a high refractive index are dispersed in a monomer, an initiator, and an organically substituted silicon compound is preferably used.
As the inorganic particles in this case, ZrO ₂ and TiO _{2 are} particularly preferably used from the viewpoint of refractive index. ZrO ₂ is most preferable for increasing the refractive index of the hard coat layer, and TiO ₂ fine particles are most preferable as the particles for the high refractive index layer and the medium refractive index layer.

As the TiO ₂ particles, inorganic particles mainly containing TiO ₂ containing at least one element selected from cobalt, aluminum, and zirconium are particularly preferable. The main component means a component having the largest content (mass%) among the components constituting the particles.
The particles mainly composed of TiO ₂ in the present invention preferably have a refractive index of 1.90 to 2.80, more preferably 2.10 to 2.80, and 2.20 to 2.80. Most preferably.
The weight average diameter of the primary particles of particles mainly composed of TiO ₂ is preferably 1 to 200 nm, more preferably 1 to 150 nm, still more preferably 1 to 100 nm, and particularly preferably 1 to 80 nm.

The crystal structure of the particles containing TiO ₂ as the main component is preferably a rutile, rutile / anatase mixed crystal, anatase, or amorphous structure, and particularly preferably a rutile structure. The main component means a component having the largest content (mass%) among the components constituting the particles.

By containing at least one element selected from Co (cobalt), Al (aluminum), and Zr (zirconium) in particles containing TiO ₂ as a main component, the photocatalytic activity of TiO ₂ can be suppressed. The weather resistance of the inventive film can be improved.
A particularly preferable element is Co (cobalt). It is also preferable to use two or more types in combination.
The inorganic particles mainly composed of TiO ₂ of the present invention may have a core / shell structure by surface treatment as described in JP-A No. 2001-166104.

  The addition amount of the monomer and inorganic particles in the layer is preferably 10 to 90% by mass, more preferably 20 to 80% by mass, based on the total mass of the binder. Two or more kinds of inorganic particles may be used in the layer.

<Low refractive index particles>
The inorganic particles contained in the low refractive index layer desirably have a low refractive index, and examples thereof include fine particles of magnesium fluoride and silica. In particular, silica fine particles are preferable in terms of refractive index, dispersion stability, and cost.
The average particle diameter of the silica fine particles is preferably 30% to 150% of the thickness of the low refractive index layer, more preferably 35% to 80%, and still more preferably 40% to 60%. That is, when the thickness of the low refractive index layer is 100 nm, the particle diameter of the silica fine particles is preferably 30 nm to 150 nm, more preferably 35 nm to 80 nm, and still more preferably 40 nm to 60 nm.
Here, the average particle diameter of the inorganic particles is measured by a Coulter counter.

  If the particle size of the silica fine particles is too small, the effect of improving the scratch resistance is reduced. If it is too large, fine irregularities are formed on the surface of the low refractive index layer, and the appearance such as black tightening and the integrated reflectance are deteriorated. The silica fine particles may be either crystalline or amorphous, and may be monodispersed particles or aggregated particles as long as a predetermined particle size is satisfied. The shape is most preferably a spherical diameter, but there is no problem even if the shape is indefinite.

Further, at least one kind of silica fine particles having an average particle size of less than 25% of the thickness of the low refractive index layer (referred to as “small size particle size silica particles”) is used as silica fine particles having the above particle size (“large size particles”). It is preferably used in combination with “silica fine particles having a diameter”.
Since the fine silica particles having a small particle size can exist in the gaps between the fine silica particles having a large particle size, they can contribute as a retaining agent for the fine silica particles having a large particle size.
When the low refractive index layer is 100 nm, the average particle size of the silica fine particles having a small size is preferably from 1 nm to 20 nm, more preferably from 5 nm to 15 nm, and particularly preferably from 10 nm to 15 nm. Use of such silica fine particles is preferable in terms of raw material costs and a retaining agent effect.

The coating amount of the low refractive index particles is ^{preferably 1mg / m 2 ~100mg / m 2} , more preferably ^{5mg / m 2 ~80mg / m 2} , more preferably from ^{10mg / m 2 ~60mg / m 2} . If the amount is too small, the effect of improving the scratch resistance is reduced. If the amount is too large, fine irregularities are formed on the surface of the low refractive index layer, and the appearance such as black tightening and the integrated reflectance are deteriorated.

<Hollow silica particles>
For the purpose of further reducing the refractive index, it is preferable to use hollow silica fine particles.

The hollow silica fine particles preferably have a refractive index of 1.15 to 1.40, more preferably 1.17 to 1.35, and most preferably 1.17 to 1.30. The refractive index here represents the refractive index of the entire particle, and does not represent the refractive index of only the outer shell silica forming the hollow silica particles. At this time, when the radius of the cavity in the particle is a and the radius of the particle outer shell is b, the porosity x represented by the following formula (II) is (Formula II)
^{x = (4πa 3/3)} / (4πb 3/3) × 100
Preferably it is 10-60%, More preferably, it is 20-60%, Most preferably, it is 30-60%. If the hollow silica particles are made to have a lower refractive index and a higher porosity, the thickness of the outer shell becomes thinner and the strength of the particles becomes weaker. From the viewpoint of scratch resistance, the low refractive index is less than 1.15. Rate particles are not preferred.

  A method for producing hollow silica is described in, for example, Japanese Patent Application Laid-Open Nos. 2001-233611 and 2002-79616. In particular, particles having cavities inside the shell and having fine pores in the shell are particularly preferred. The refractive index of these hollow silica particles can be calculated by the method described in JP-A-2002-79616.

The coating amount of the hollow silica is ^preferably from ^{1mg / m 2 ~100mg / m 2} , more preferably ^{5mg / m 2 ~80mg / m 2} , more preferably from ^{10mg / m 2 ~60mg / m 2} . If the amount is too small, the effect of lowering the refractive index and the effect of improving the scratch resistance will be reduced.
The average particle diameter of the hollow silica is preferably 30% to 150% of the thickness of the low refractive index layer, more preferably 35% to 80%, and still more preferably 40% to 60%. That is, if the thickness of the low refractive index layer is 100 nm, the particle size of the hollow silica is preferably 30 nm to 150 nm, more preferably 35 nm to 100 nm, and still more preferably 40 nm to 65 nm.
If the particle size of the silica particles is too small, the proportion of cavities will decrease and a decrease in refractive index cannot be expected. Getting worse. The silica fine particles may be either crystalline or amorphous, and monodisperse particles are preferred. The shape is most preferably a spherical diameter, but there is no problem even if the shape is indefinite.
Further, two or more kinds of hollow silica having different particle average particle sizes can be used in combination. Here, the average particle diameter of the hollow silica can be determined from an electron micrograph.
The specific surface area of the hollow silica in the present invention is preferably from 20 to 300 m ² / g, more preferably 30~120m ² / g, most preferably 40~90m ² / g. The surface area can be obtained by the BET method using nitrogen.

  In the present invention, silica particles having no voids can be used in combination with hollow silica. The preferred particle size of silica without voids is 30 nm to 150 nm, more preferably 35 nm to 100 nm, and most preferably 40 nm to 80 nm.

2- (10) Conductive Particles Various conductive particles can be used for imparting conductivity to the film of the present invention.
The conductive particles are preferably formed from a metal oxide or nitride. Examples of metal oxides or nitrides include tin oxide, indium oxide, zinc oxide and titanium nitride. Tin oxide and indium oxide are particularly preferred. The conductive inorganic particles are mainly composed of oxides or nitrides of these metals, and can further contain other elements. The main component means a component having the largest content (mass%) among the components constituting the particles. Examples of other elements include Ti, Zr, Sn, Sb, Cu, Fe, Mn, Pb, Cd, As, Cr, Hg, Zn, Al, Mg, Si, P, S, B, Nb, In, V and halogen atoms are included. In order to increase the conductivity of tin oxide and indium oxide, it is preferable to add Sb, P, B, Nb, In, V and a halogen atom. Particularly preferred are tin oxide containing Sb (ATO) and indium oxide containing Sn (ITO). The ratio of Sb in ATO is preferably 3 to 20% by mass. The ratio of Sn in ITO is preferably 5 to 20% by mass.

The average particle diameter of the primary particles of the conductive inorganic particles used for the antistatic layer is preferably 1 to 150 nm, more preferably 5 to 100 nm, and most preferably 5 to 70 nm. The average particle diameter of the conductive inorganic particles in the antistatic layer to be formed is 1 to 200 nm, preferably 5 to 150 nm, more preferably 10 to 100 nm, and more preferably 10 to 80 nm. Most preferred. The average particle diameter of the conductive inorganic particles is an average diameter weighted by the mass of the particles and can be measured by a light scattering method or an electron micrograph.
The specific surface area of the conductive inorganic particles is preferably from 10 to 400 m ² / g, more preferably from 20 to 200 m ² / g, and most preferably from 30 to 150 m ² / g.

The conductive inorganic particles may be surface treated. The surface treatment is performed using an inorganic compound or an organic compound. Examples of inorganic compounds used for the surface treatment include alumina and silica. Silica treatment is particularly preferred. Examples of organic compounds used for the surface treatment include polyols, alkanolamines, stearic acid, silane coupling agents, and titanate coupling agents. Silane coupling agents are most preferred. Two or more kinds of surface treatments may be performed in combination.
The shape of the conductive inorganic particles is preferably a rice grain shape, a spherical shape, a cubic shape, a spindle shape or an indefinite shape.

Two or more kinds of conductive particles may be used in a specific layer or as a film.
The proportion of the conductive inorganic particles in the antistatic layer is preferably 20 to 90% by mass, preferably 25 to 85% by mass, and more preferably 30 to 80% by mass.

  The conductive inorganic particles can be used for forming an antistatic layer in the form of a dispersion.

2- (11) Surface Treatment Agent The inorganic particles used in the present invention are plasma in order to stabilize dispersion in the dispersion or coating solution, or to increase the affinity and binding properties with the binder component. A physical surface treatment such as a discharge treatment or a corona discharge treatment, or a chemical surface treatment with a surfactant or a coupling agent may be performed.

The surface treatment can be performed using a surface treatment agent of an inorganic compound or an organic compound. Examples of inorganic compounds used for the surface treatment include inorganic compounds containing cobalt (CoO ₂ , Co ₂ O ₃ , Co ₃ O _4, etc.) and inorganic compounds containing aluminum (Al ₂ O ₃ , Al (OH) ₃ Etc.), inorganic compounds containing zirconium (ZrO ₂ , Zr (OH) ₄ etc.), inorganic compounds containing silicon (SiO ₂ etc.), inorganic compounds containing iron (Fe ₂ O ₃ etc.), etc. .
An inorganic compound containing cobalt, an inorganic compound containing aluminum, and an inorganic compound containing zirconium are particularly preferable, and an inorganic compound containing cobalt, Al (OH) ₃ , and Zr (OH) ₄ are most preferable.
Examples of organic compounds used for the surface treatment include polyols, alkanolamines, stearic acid, silane coupling agents, and titanate coupling agents. Silane coupling agents are most preferred. In particular, the surface treatment is preferably performed with at least one of a silane coupling agent (organosilane compound), a partial hydrolyzate thereof, and a condensate thereof.

Examples of titanate coupling agents include metal alkoxides such as tetramethoxy titanium, tetraethoxy titanium, and throat tetraisopropoxy titanium, and preneact (KR-TTS, KR-46B, KR-55, KR-41B, etc .; Ajinomoto Co., Inc. ))).
Examples of the organic compound used for the surface treatment include polyols, alkanolamines, and other organic compounds having an anionic group, and particularly preferable are organic compounds having a carboxyl group, a sulfonic acid group, or a phosphoric acid group. is there. Stearic acid, lauric acid, oleic acid, linoleic acid, linolenic acid and the like can be preferably used.
The organic compound used for the surface treatment preferably further has a crosslinked or polymerizable functional group. Crosslinkable or polymerizable functional groups include ethylenically unsaturated groups (for example, (meth) acrylic groups, allyl groups, styryl groups, vinyloxy groups, etc.) that can undergo addition reactions and polymerization reactions with radical species, cationic polymerizable groups (Epoxy groups, oxatanyl groups, vinyloxy groups, etc.), polycondensation reactive groups (hydrolyzable silyl groups, etc., N-methylol groups) and the like can be mentioned, and groups having an ethylenically unsaturated group are preferred.

  Two or more kinds of these surface treatments can be used in combination, and it is particularly preferable to use an inorganic compound containing aluminum and an inorganic compound containing zirconium.

When the inorganic particles are silica, the use of a coupling agent is particularly preferred. As the coupling agent, an alkoxy metal compound (eg, titanium coupling agent, silane coupling agent) is preferably used. Of these, silane coupling treatment is particularly effective.
The above coupling agent is used as a surface treatment agent for the inorganic filler of the low refractive index layer in advance for surface treatment prior to the preparation of the layer coating solution, and is added as an additive during the preparation of the layer coating solution. It is preferable to make it contain in a layer.
The silica fine particles are preferably dispersed in the medium in advance before the surface treatment in order to reduce the load of the surface treatment.
Specific examples of the surface treatment agent and the surface treatment catalyst that can be preferably used in the present invention include organosilane compounds and catalysts described in WO 2004/017105.

2- (12) Dispersant Various dispersants can be used for dispersing the particles used in the present invention.
The dispersant preferably further contains a crosslinkable or polymerizable functional group. Crosslinkable or polymerizable functional groups include ethylenically unsaturated groups (for example, (meth) acryloyl groups, allyl groups, styryl groups, vinyloxy groups, etc.) that can undergo addition reactions and polymerization reactions with radical species, and cationic polymerizable groups (epoxies). Groups, oxatanyl groups, vinyloxy groups, etc.), polycondensation reactive groups (hydrolyzable silyl groups, etc., N-methylol groups) and the like, and functional groups having an ethylenically unsaturated group are preferred.

It is preferable to use a dispersant having an anionic group for the dispersion of inorganic particles, particularly the dispersion of inorganic particles mainly composed of TiO ₂ , more preferably an anionic group and a cross-linkable or polymerizable functional group, It is particularly preferable that the dispersant has the cross-linked or polymerizable functional group in the side chain.

  As the anionic group, a group having an acidic proton such as a carboxyl group, a sulfonic acid group (sulfo), a phosphoric acid group (phosphono), a sulfonamide group, or a salt thereof is effective, and in particular, a carboxyl group, a sulfonic acid group, A phosphoric acid group or a salt thereof is preferable, and a carboxyl group and a phosphoric acid group are particularly preferable. The number of anionic groups contained in the dispersing agent per molecule may be plural, but is preferably 2 or more on average, more preferably 5 or more, Particularly preferred is 10 or more. Moreover, the anionic group contained in a dispersing agent may contain multiple types in 1 molecule.

In the dispersant having an anionic group in the side chain, the composition of the anionic group-containing repeating unit is in the range of 10 ^{−4 to} 100 mol%, preferably 1 to 50 mol%, particularly preferably 5 in the total repeating units. ˜20 mol%.

  The dispersant preferably further contains a crosslinkable or polymerizable functional group. Crosslinkable or polymerizable functional groups include ethylenically unsaturated groups (for example, (meth) acryloyl groups, allyl groups, styryl groups, vinyloxy groups, etc.) that can undergo addition reactions and polymerization reactions with radical species, and cationic polymerizable groups (epoxies). Groups, oxatanyl groups, vinyloxy groups, etc.), polycondensation reactive groups (hydrolyzable silyl groups, etc., N-methylol groups) and the like, and functional groups having an ethylenically unsaturated group are preferred.

The average number of cross-linkable or polymerizable functional groups contained in the dispersant per molecule is preferably 2 or more, more preferably 5 or more, and particularly preferably 10 or more. Moreover, the crosslinking or polymerizable functional group contained in the dispersant may contain a plurality of types in one molecule.

In the preferred dispersant for use in the present invention, examples of the repeating unit having an ethylenically unsaturated group in the side chain include poly-1,2-butadiene and poly-1,2-isoprene structures or (meth) acrylic acid. An ester or amide repeating unit to which a specific residue (the R group of —COOR or —CONHR) is bonded can be used. Examples of the specific residue (R _{^{group), - (CH 2) n}} -CR 21 = CR 22 R 23, - (CH 2 O) n-CH 2 CR 21 = CR 22 R 23, - (CH ^{_{2 CH 2 O) n-CH}} 2 CR 21 = CR 22 R 23, - (CH 2) n-NH-CO-O-CH 2 CR 21 = CR 22 R 23, - (CH 2) n-O-CO - ^{CR 21} = CR 22 ^{R 23} and _{- (CH} 2 _CH 2 ^O), respectively ^{2 -X (R} 21 ^{~R 23,} a hydrogen atom, a halogen atom, an alkyl group having 1 to 20 carbon atoms, an aryl group, an alkoxy R ²¹ and R ²² or R ²³ may be bonded to each other to form a ring, n is an integer of 1 to 10, and X is a dicyclopentadienyl residue. There are). Specific examples of R of the ester residue include —CH ₂ CH═CH ₂ (corresponding to an allyl (meth) acrylate polymer described in JP-A No. 64-17047), —CH ₂ CH ₂ O—CH ₂ CH. _{= CH 2, -CH 2 CH 2} OCOCH = CH 2, -CH 2 CH 2 OCOC (CH 3) = CH 2, -CH 2 C (CH 3) = CH 2, -CH 2 CH = CH-C 6 H ₅ , —CH ₂ CH ₂ OCOCH═CH—C ₆ H ₅ , —CH ₂ CH ₂ —NHCOO—CH ₂ CH═CH ₂ and —CH ₂ CH ₂ O—X (X is a dicyclopentadienyl residue) Is included. Specific examples of R of the amide residue include —CH ₂ CH═CH ₂ , —CH ₂ CH ₂ —Y (Y is a 1-cyclohexenyl residue) and —CH ₂ CH ₂ —OCO—CH═CH ₂ , _{-CH 2 CH 2 -OCO-C (} CH 3) = CH 2 are included.

  In the dispersant having an ethylenically unsaturated group, a free radical (a polymerization initiation radical or a growth radical of a polymerization process of a polymerizable compound) is added to the unsaturated bond group, and the polymer compound is directly or between molecules. Addition polymerization is carried out through the polymerization chain, and a crosslink is formed between the molecules to cure. Alternatively, atoms in the molecule (for example, hydrogen atoms on carbon atoms adjacent to the unsaturated bond group) are extracted by free radicals to form polymer radicals that are bonded together to form a bridge between the molecules. Harden.

  The weight average molecular weight (Mw) of the dispersant having an anionic group and a crosslinkable or polymerizable functional group and having the crosslinkable or polymerizable functional group in the side chain is not particularly limited, but is preferably 1000 or more. . The more preferred weight average molecular weight (Mw) of the dispersant is 2,000 to 1,000,000, more preferably 5,000 to 200,000, and particularly preferably 10,000 to 100,000.

  The cross-linkable or polymerizable functional group-containing unit may constitute all repeating units other than the anionic group-containing repeating unit, preferably 5 to 50 mol% of the total cross-linking or repeating unit, particularly Preferably it is 5-30 mol%.

  The dispersant may be a copolymer with an appropriate monomer other than a monomer having a crosslinking or polymerizable functional group or an anionic group. Although it does not specifically limit regarding a copolymerization component, It selects from various viewpoints, such as dispersion stability, compatibility with another monomer component, and the intensity | strength of a formed film. Preferable examples include methyl (meth) acrylate, n-butyl (meth) acrylate, t-butyl (meth) acrylate, cyclohexyl (meth) acrylate, styrene and the like.

  The form of the dispersant is not particularly limited, but is preferably a block copolymer or a random copolymer, and particularly preferably a random copolymer from the viewpoint of cost and ease of synthesis.

  The amount of the dispersant used relative to the inorganic particles is preferably in the range of 1 to 50% by mass, more preferably in the range of 5 to 30% by mass, and most preferably 5 to 20% by mass. Two or more dispersants may be used in combination.

  Specific examples of the dispersant preferably used in the present invention are shown below, but the dispersant for the present invention is not limited thereto. Unless otherwise specified, it represents a random copolymer.

2- (12) Antifouling agent For the purpose of imparting characteristics such as slipperiness, antifouling property, water resistance and chemical resistance to the film of the present invention, particularly the uppermost layer and the hard coat layer of the film, Separately, it is preferable to appropriately add, as additives, slip agents, antifouling agents, and the like made of known silicone compounds and / or fluorine compounds.
When these additives are added, it is preferably added in the range of 0.01 to 20% by mass of the total solid content of the layer, more preferably in the range of 0.05 to 10% by mass. Yes, particularly preferably 0.1 to 5% by mass.

  Preferable examples of the silicone compound include those having a substituent at the terminal and / or side chain of a compound chain containing a plurality of dimethylsilyloxy units as repeating units. The compound chain containing dimethylsilyloxy as a repeating unit may contain a structural unit other than dimethylsilyloxy. The substituents may be the same or different, and a plurality of substituents are preferable. Examples of preferred substituents include acryloyl group, methacryloyl group, vinyl group, aryl group, cinnamoyl group, epoxy group, oxetanyl group, hydroxyl group, fluoroalkyl group, polyoxyalkylene group, carboxyl group, amino group and the like. It is done. Although there is no restriction | limiting in particular in molecular weight, It is preferable that it is 100,000 or less, It is more preferable that it is 50,000 or less, It is especially preferable that it is 3000-30000, It is most preferable that it is 10,000-20000. Although there is no restriction | limiting in particular in silicone atom content of a silicone type compound, it is preferable that it is 18.0 mass% or more, it is especially preferable that it is 25.0-37.8 mass%, and 30.0-37.0. Most preferably, it is mass%. Examples of preferred silicone compounds are X-22-174DX, X-22-2426, X-22-164B, X22-164C, X-22-170DX, X-22-176D, X, manufactured by Shin-Etsu Chemical Co., Ltd. -22-1821 (named above), manufactured by Chisso Corporation, FM-0725, FM-7725, FM-4421, FM-5521, FM6621, FM-1121, Gelest DMS-U22, RMS-033, RMS- 083, UMS-182, DMS-H21, DMS-H31, HMS-301, FMS121, FMS123, FMS131, FMS141, FMS221 (named above) but not limited thereto.

As the fluorine compound, a compound having a fluoroalkyl group is preferable. The fluoroalkyl group preferably has 1 to 20 carbon atoms, more preferably 1 to 10 carbon atoms, and a straight chain (for example, —CF ₂ CF ₃ , —CH ₂ (CF ₂ ) ₄ H, —CH ₂ (CF ₂ ) ₈ CF ₃ , —CH ₂ CH ₂ (CF ₂ ) ₄ H, etc.), even branched structures (eg, CH (CF ₃ ) ₂ , CH ₂ CF (CF ₃ ) ₂ , CH (CH ₃ ) CF ₂ CF ₃ , CH (CH ₃ ) (CF ₂ ) ₅ CF ₂ H, etc.), alicyclic structures (preferably 5-membered or 6-membered rings such as perfluorocyclohexyl group, perfluorocyclopentyl, etc. Group or an alkyl group substituted with these, and may have an ether bond (for example, CH ₂ OCH ₂ CF ₂ CF ₃ , CH ₂ CH ₂ OCH ₂ C ₄ F ₈ H, CH ₂ CH _{2 CH 2 CH 2 C 8 F 17} , CH 2 CH 2 OCF 2 CF 2 OCF 2 CF 2 H , etc.). A plurality of the fluoroalkyl groups may be contained in the same molecule.

  The fluorine-based compound preferably further has a substituent that contributes to bond formation or compatibility with the layer coating. The substituents may be the same or different, and a plurality of substituents are preferable. Examples of preferred substituents include acryloyl group, methacryloyl group, vinyl group, aryl group, cinnamoyl group, epoxy group, oxetanyl group, hydroxyl group, polyoxyalkylene group, carboxyl group, amino group and the like. The fluorine-based compound may be a polymer or an oligomer with a compound not containing a fluorine atom, and the molecular weight is not particularly limited. Although there is no restriction | limiting in particular in fluorine atom content of a fluorine-type compound, It is preferable that it is 20 mass% or more, It is especially preferable that it is 30-70 mass%, It is most preferable that it is 40-70 mass%. Examples of preferred fluorine-based compounds include Daikin Chemical Industries, Ltd., R-2020, M-2020, R-3833, M-3833 (named above), Dainippon Ink Co., Ltd., Megafac F-171. , F-172, F-179A, defender MCF-300 (trade name) and the like, but are not limited thereto.

  The compound used for the antifouling agent preferably contains at least one group having reactivity with the binder in the molecule. Examples of preferable reactive groups include thermosetting active hydrogen atoms, hydroxyl groups, melamine, active energy ray-curable (meth) acryloyl groups, and epoxy groups, and are melamine or (meth) acryloyl groups. Particularly preferred.

  For the purpose of imparting properties such as dust resistance and antistatic properties, a known cationic surfactant or a dustproof agent such as a polyoxyalkylene compound, an antistatic agent, or the like can be appropriately added. These dustproofing agent and antistatic agent may contain the structural unit as a part of the function in the above-mentioned silicone compound or fluorine compound. When these are added as additives, it is preferably added in the range of 0.01 to 20% by mass of the total solid content of the low refractive index layer, more preferably in the range of 0.05 to 10% by mass. Particularly preferred is 0.1 to 5% by mass. Examples of preferred compounds include, but are not limited to, Dainippon Ink Co., Ltd., MegaFace F-150 (trade name), Toray Dow Corning Co., Ltd., SH-3748 (trade name), and the like. Do not mean.

3- (1) -1 Hard Coat Layer The film of the present invention is provided with a hard coat layer on one surface of the transparent support in order to impart the physical strength of the film.
Preferably, a low refractive index layer is provided thereon, and more preferably, an intermediate refractive index layer and a high refractive index layer are provided between the hard coat layer and the low refractive index layer to constitute an antireflection film.
The hard coat layer may be composed of two or more layers.

  The refractive index of the hard coat layer in the present invention is preferably in the range of 1.48 to 2.00, more preferably 1.52 to 1, from the optical design for obtaining an antireflection film. .90, more preferably 1.55 to 1.80.

The strength of the hard coat layer is preferably 4H or more, more preferably 5H or more, and most preferably 6H or more in the pencil hardness test.
Furthermore, in the Taber test according to JIS K5400, the smaller the wear amount of the test piece before and after the test, the better.
In addition, the thickness of the optical film including the hard coat layer is usually about 0.5 μm to 50 μm from the viewpoint of imparting sufficient durability, impact resistance, and scratch resistance to the film. , Preferably 8 μm to 30 μm, more preferably 15 μm to 30 μm, and most preferably 20 μm to 30 μm.

The hard coat layer contains a translucent resin. The translucent resin may be formed from the monomer binder described in 2- (1) above, or may be formed from the polymer binder described in 2- (2) above. The hard coat layer of the present invention is particularly preferably formed by a crosslinking reaction or a polymerization reaction of an ionizing radiation curable compound. For example, it may be formed by coating a coating composition containing an ionizing radiation-curable polyfunctional monomer or polyfunctional oligomer on a transparent support and subjecting the polyfunctional monomer or polyfunctional oligomer to a crosslinking reaction or a polymerization reaction. it can.
The functional group of the ionizing radiation curable polyfunctional monomer or polyfunctional oligomer is preferably a light, electron beam, or radiation polymerizable group, and among them, a photopolymerizable functional group is preferable.
Examples of the photopolymerizable functional group include unsaturated polymerizable functional groups such as a (meth) acryloyl group, a vinyl group, a styryl group, and an allyl group. Among them, a (meth) acryloyl group is preferable.

  The hard coat layer contains matte particles having an average particle diameter of 0.5 to 10.0 μm, preferably 2.0 to 6.0 μm, such as inorganic compound particles or resin particles, for the purpose of imparting internal scattering properties. May be.

  For the purpose of controlling the refractive index of the hard coat layer, a high refractive index monomer, inorganic particles, or both can be added to the binder of the hard coat layer. In addition to the effect of controlling the refractive index, the inorganic particles also have the effect of suppressing cure shrinkage due to the crosslinking reaction. In the present invention, a polymer formed by polymerizing the polyfunctional monomer and / or the high refractive index monomer after the hard coat layer is formed, and the inorganic particles dispersed therein are referred to as a binder.

  In order to maintain the sharpness of the image, it is preferable to adjust the clarity of the transmitted image in addition to adjusting the uneven shape of the surface. The clearness of the transmitted image of the clear antireflection film is preferably 60% or more. The transmitted image clarity is generally an index indicating the degree of blurring of an image reflected through a film, and the larger this value, the clearer and better the image viewed through the film. The transmitted image definition is preferably 70% or more, and more preferably 80% or more.

  Further, in the present invention, a curable composition comprising a compound having two or more ethylenically unsaturated groups and one or more isocyanurate rings in the same molecule as a hard code layer in order to suppress curling. It may be used. In the said compound, the kind of preferable ethylenically unsaturated group is an acryloyl group, a methacryloyl group, a styryl group, a vinyl ether group, More preferably, it is a methacryloyl group or an acryloyl group, Most preferably, it is an acryloyl group. For example, the compound represented by the chemical formula (2) described in JP-A No. 2004-141732 and the chemical formula (1) described in JP-A No. 2005-103973 can be used.

  In the present invention, the hard coat layer is obtained by adding another basic material such as the ionizing radiation curable polyfunctional monomer or polyfunctional oligomer described in 2- (1) to the compound having the isocyanurate ring. Also good.

3- (1) -2 Antiglare layer The hard coat layer can be made an antiglare layer by imparting antiglare properties by surface scattering.

As a method of forming the antiglare property, a method of laminating and forming a mat-shaped shaping film having fine irregularities on the surface as described in JP-A-6-16851, as described in JP-A-2000-206317 A method of forming by curing shrinkage of an ionizing radiation curable resin due to a difference in the amount of ionizing radiation, and as described in JP-A No. 2000-338310, when the weight ratio of a good solvent to a translucent resin decreases by drying. A method of solidifying the light-sensitive fine particles and the translucent resin while gelling to form unevenness on the coating film surface, a method of imparting surface unevenness by external pressure as described in JP-A-2000-275404, etc. These known methods can be used.
The antiglare layer that can be used in the present invention preferably contains a binder capable of imparting hard coat properties, translucent particles for imparting antiglare properties, and a solvent as essential components. It is preferable that irregularities on the surface be formed by the protrusions of the protrusions themselves or protrusions formed by an aggregate of a plurality of particles.
The antiglare layer formed by dispersing the matte particles is composed of a binder and translucent particles dispersed in the binder. The antiglare layer having antiglare properties preferably has both antiglare properties and hard coat properties.

As specific examples of the mat particles, particles of inorganic compounds such as silica particles and TiO ₂ particles; resin particles such as acrylic particles, crosslinked acrylic particles, polystyrene particles, crosslinked styrene particles, melamine resin particles, and benzoguanamine resin particles are preferable. Can be mentioned. Of these, crosslinked styrene particles, crosslinked acrylic particles, and silica particles are preferred.
The shape of the mat particles can be either spherical or irregular.

  Two or more kinds of mat particles having different particle diameters may be used in combination. It is possible to impart anti-glare properties with mat particles having a larger particle size and to impart other optical characteristics with mat particles having a smaller particle size. For example, when an anti-glare antireflection film is attached to a high-definition display of 133 ppi or higher, a problem in display image quality called “glare” may occur. “Glitter” is derived from the fact that pixels are enlarged or reduced due to unevenness present on the surface of the antiglare and antireflection antireflection film, resulting in loss of luminance uniformity, but particles smaller than mat particles that impart antiglare properties. It can be greatly improved by using mat particles having a diameter different from that of the binder.

In the hard coat layer or the antiglare layer of the present invention, the ratio (B / A) of the surface double bond amount A before curing and the residual surface double bond amount B after curing is 0.05 ≦ B / A ≦. It is preferable to be in the range of 0.5. B / A means the double bond residual ratio on the surface of the hard coat layer or the antiglare layer, and indicates that the closer the B / A is to 0, the closer to the complete cured state. The present inventors have found that the film hardness can be improved by reacting the binding group of the hard coat layer or the antiglare layer within a specific range.
The residual ratio B / A is more preferably 0.05 ≦ B / A ≦ 0.4, and most preferably 0.05 ≦ B / A ≦ 0.3.

The amount of residual double bonds can be controlled by the oxygen concentration at the time of curing and the irradiation amount. The oxygen concentration so that the residual ratio is within the above range is preferably 2% by volume or less, more preferably 1% by volume or less, still more preferably 0.5% by volume or less, and most preferably 0.1% by volume or less. It is.
The oxygen concentration can be controlled by changing the flow rate of nitrogen or the mixing ratio of nitrogen and air.

3- (2) Support As the transparent support of the optical film of the present invention, it is preferable to use a plastic film. Examples of the polymer forming the plastic film include cellulose esters (eg, triacetyl cellulose, diacetyl cellulose, typically TAC-TD80U, TD80UF, etc. manufactured by Fuji Photo Film), polyamides, polycarbonates, polyesters (eg, polyethylene terephthalate, polyethylene). Naphthalate), polystyrene, polyolefin, norbornene resin (Arton: trade name, manufactured by JSR), amorphous polyolefin (ZEONEX: trade name, manufactured by Nippon Zeon), and the like. Of these, triacetyl cellulose, polyethylene terephthalate, and polyethylene naphthalate are preferable, and triacetyl cellulose is particularly preferable. In addition, the cellulose acylate film substantially free of halogenated hydrocarbons such as dichloromethane and the process for producing the same are disclosed in the JIII Journal of Technical Disclosure (Publication No. 2001-1745, published on March 15, 2001; The cellulose acylate described herein can also be preferably used in the present invention.

3- (3) Polarizing Plate The polarizing plate of the present invention is mainly composed of two protective films sandwiching the polarizing film from both sides. At least one of the two protective films sandwiching the polarizing film from both sides is the optical film or antireflection film of the present invention. 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, particularly the antireflection film, as the outermost layer, reflection of external light and the like can be prevented, and a polarizing plate having excellent scratch resistance and antifouling properties can be obtained.

As the polarizing film, a known polarizing film or a polarizing film cut out from a long polarizing film whose absorption axis is neither parallel nor perpendicular to the longitudinal direction may be used. A long polarizing film whose absorption axis is neither parallel nor perpendicular to the longitudinal direction is produced by the following method.
That is, a polarizing film stretched by applying tension while holding both ends of a continuously supplied polymer film by a holding means, stretched at least 1.1 to 20.0 times in the film width direction, The progress of the film is such that the difference between the moving speeds in the longitudinal direction of the holding device is within 3%, and the angle formed by the film moving direction at the exit of the step of holding both ends of the film and the substantial stretching direction of the film is inclined by 20 to 70 °. The film can be produced by a stretching method in which the direction is bent while holding both ends of the film. In particular, those inclined by 45 ° are preferably used from the viewpoint of productivity.
The method for stretching the polymer film is described in detail in paragraphs 0020 to 0030 of JP-A-2002-86554.

  When the optical film of the present invention is used as one side of a surface protective film of a polarizing film, it is 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 particular, for TN mode and IPS mode liquid crystal display devices, as described in JP-A-2001-100043, an optical compensation film having an effect of widening a viewing angle is used as a protective film having two polarizing films on both sides. Among them, by using it on the surface opposite to the optical film of the present invention, a polarizing plate having an antireflection effect and a viewing angle expansion effect can be obtained with the thickness of one polarizing plate, which is particularly preferable.

  The image display device of the present invention is an image display device having at least one of the optical film, the antireflection film, and the polarizing plate of the present invention. The configuration of the image display device is not particularly limited, and various known image display devices can be applied. The image display device includes at least an image display unit and an image control unit. Although the film of this invention is not specifically limited, It is preferable to use it for an image display part.

4). Various characteristic values Various measurement methods related to the present invention and preferable characteristic values are shown below.

4- (1) Dynamic friction coefficient measurement The dynamic friction coefficient was evaluated as an index of surface slipperiness. As the dynamic friction coefficient, a sample was conditioned at 25 ° C. and a relative humidity of 60% for 2 hours, and then a value measured with a HEIDON-14 dynamic friction measuring machine at a 5 mmφ stainless steel ball, a load of 100 g, and a speed of 60 cm / min was used.

4- (2) Scratch resistance <Steel wool scratch resistance evaluation>
By using a rubbing tester and carrying out a rubbing test under the following conditions, it can be used as an index of scratch resistance.
Evaluation environmental conditions: 25 ° C., 60% RH
Rubbing material: Steel wool (manufactured by Nippon Steel Wool Co., Ltd., Gelade No. 0000) Wound around the rubbing tip (1 cm × 1 cm) of a tester that comes into contact with the sample, and fixed with a band.
Travel distance (one way): 13cm
Rubbing speed: 13 cm / second,
Load: 500 g / cm ²
Tip contact area: 1 cm × 1 cm, rubbing frequency: 10 reciprocations.
An oil-based black ink is applied to the back side of the sample that has been rubbed, and scratches on the rubbed portion are visually observed with reflected light, or evaluation is made based on the difference from the amount of reflected light other than the rubbed portion.

4- (3) Haze The surface haze and internal haze of the present invention will be described in detail.
[1] The total haze value (H) of the film obtained according to JIS-K7136 is measured.
[2] Add a few drops of silicone oil to the front and back surfaces of the optical film, and use two 1 mm thick glass plates (micro slide glass product number S9111, manufactured by MATSANAMI) between the front and back to completely A value obtained by subtracting the haze measured by optically adhering the glass plate and the obtained film and measuring the haze with the surface haze removed, and sandwiching only silicone oil between two separately measured glass plates. Was calculated as the internal haze (Hi) of the film.
[3] A value obtained by subtracting the internal haze (Hi) calculated in [2] from the total haze (H) measured in [1] was calculated as the surface haze (Hs) of the film.

4- (4) Ratio of surface double bond amount A before curing and residual surface double bond amount B after curing In the present invention, the surface double bond amount method measures the amount of double bonds on the surface. If possible, the measuring method is not particularly limited. For example, the unsaturated bond can be modified with bromine and quantified by measuring the peak intensity with ESCA. Specifically, the double bond residual ratio (B / A) is obtained by modifying a double bond of a material existing on the surface of a sample (for example, hard coat layer) with Br (bromine atom), and performing X-ray photoelectron spectroscopy. It can be quantified by the method (ESCA). As this method, for example, the method described on page 63 of “X-ray Photoelectron Spectroscopy” (Maruzen), a surface analysis technology selection edited by the Surface Science Society of Japan can be applied. The method for measuring the amount of double bonds on the surface can be measured, for example, by the method A for measuring the amount of double bonds on the surface described below.

(Method for measuring the amount of double bonds on the surface)
The sample is allowed to stand for 1 hour in a gas phase in a sealed container containing 2% by mass of bromine water, and Br is added to the double bond portion. The signal area intensity of ESCA Br2p and C1s on the sample surface is measured, and the ratio Br / C between them is obtained and used as an index of the surface double bond amount. The value of Br / C after curing with respect to Br / C before curing can be determined as the residual ratio of surface double bonds (B / A).

4- (5) Evaluation of curl A hard coat film sample was cut into 35 mm × 1 25 mm and the hard coat layer side was placed on a horizontal surface at a temperature of 25 ° C. and a relative humidity of 60%. After standing for 2 hours, curl was evaluated by measuring the average value of the heights of the four corners from the horizontal plane. This value is preferably as small as possible, and is less practical than 15 mm.

  Examples of the present invention will be described below, but the present invention is not limited thereto. In the following examples, “part” means “part by mass”.

[Example 1]
(Preparation of sol liquid a-1)
A stirrer, a reactor equipped with a reflux condenser, 120 parts of methyl ethyl ketone, 100 parts of acryloxypropyltrimethoxysilane (KBM-5103, manufactured by Shin-Etsu Chemical Co., Ltd.), 3 parts of diisopropoxyaluminum ethyl acetoacetate were added and mixed. After that, 30 parts of ion-exchanged water was added and reacted at 60 ° C. for 4 hours, and then cooled to room temperature to obtain sol liquid a-1.
The mass average molecular weight was 1800, and among the components higher than the oligomer component, the component having a molecular weight of 1000 to 20000 was 100%. ^The condensation rate α calculated from the ²⁹ Si-NMR measurement according to the aforementioned mathematical formula (I) was 0.88. Further, from the gas chromatography analysis, no acryloxypropyltrimethoxysilane as a raw material remained.

(Preparation of sol liquid a-2)
In a 1,000 ml reaction vessel equipped with a thermometer, a nitrogen inlet tube and a dropping funnel, 187 g (0.80 mol) of acryloxyoxypropyltrimethoxysilane, 27.2 g (0.20 mol) of methyltrimethoxysilane, 320 g of methanol ( 10 mol) and 0.06 g (0.001 mol) of KF were added, and 15.1 g (0.86 mol) of water was slowly added dropwise at room temperature with stirring. After completion of the dropwise addition, the mixture was stirred at room temperature for 3 hours, and then heated and stirred for 2 hours under methanol reflux. Thereafter, the low boiling point component was distilled off under reduced pressure and further filtered to obtain 120 g of sol liquid a-2. As a result of GPC measurement of the substance thus obtained, the mass average molecular weight was 1500, and among the components higher than the oligomer component, the component having a molecular weight of 1000 to 20000 was 30%.
Moreover, from the measurement result of 1H-NMR, the structure of the obtained substance was a structure represented by the following general formula.

Furthermore, the condensation rate α as determined by ²⁹ Si-NMR was 0.56. From this analysis result, it was found that the silane coupling agent sol was mostly composed of a linear structure.
From the gas chromatography analysis, the raw material acryloxypropyltrimethoxysilane had a residual rate of 5% or less.

(1) Preparation of coating solution ─────────────────────────────────────
Composition of coating solution A-1-1 for anti-glare hard coat layer────────────────────────────────── ──
PET-30 50 parts by weight Irgacure 184 2 parts by weight SX-350 (30%) 0.3 parts by weight Crosslinked acrylic-styrene particles (30%) 2.6 parts by weight Sol solution a-2 9.5 parts by weight Toluene 38. 5 parts by weight─────────────────────────────────────

────────────────────────────────────
Composition of coating solution A-1-2 for anti-glare hard coat layer ────────────────────────────────── ──
PET-30 50 parts by weight Irgacure 184 2 parts by weight SX-350 (30%) 0.3 parts by weight Crosslinked acrylic-styrene particles (30%) 2.6 parts by weight X-22-164C 0.3 parts by weight Sol solution a -2 9.5 parts by weight Toluene 38.5 parts by weight ────────────────────────────────────

────────────────────────────────────
Composition of coating solution A-1-3 for anti-glare hard coat layer────────────────────────────────── ──
PET-30 50 parts by weight Irgacure 184 2 parts by weight SX-350 (30%) 0.3 parts by weight crosslinked acrylic-styrene particles (30%) 2.6 parts by weight X-22-164C 0.6 parts by weight Sol solution a -2 9.5 parts by weight Toluene 38.5 parts by weight ────────────────────────────────────

────────────────────────────────────
Composition of coating solution A-2-1 for anti-glare hard coat layer────────────────────────────────── ──
PET-30 50 parts by weight Irgacure 184 2 parts by weight SX-350 (30%) 1.2 parts by weight Crosslinked acrylic-styrene particles (30%) 10 parts by weight Sol solution a-2 9.5 parts by weight Toluene 38.5 parts by weight ────────────────────────────────────

────────────────────────────────────
Composition of coating solution A-2-2 for anti-glare hard coat layer────────────────────────────────── ──
PET-30 50 parts by weight Irgacure 184 2 parts by weight SX-350 (30%) 1.2 parts by weight Crosslinked acrylic-styrene particles (30%) 10 parts by weight X-22-164C 0.3 parts by weight Sol solution a-2 9.5 parts by weight Toluene 38.5 parts by weight ─────────────────────────────────────

────────────────────────────────────
Composition of coating solution A-2-3 for antiglare hard coat layer ────────────────────────────────── ──
PET-30 50 parts by weight Irgacure 184 2 parts by weight SX-350 (30%) 1.2 parts by weight Cross-linked acrylic-styrene particles (30%) 10 parts by weight X-22-164C 0.6 parts by weight Sol solution a-2 9.5 parts by weight Toluene 38.5 parts by weight ─────────────────────────────────────

────────────────────────────────────
Composition of coating solution A-3-1 for anti-glare hard coat layer ────────────────────────────────── ──
PET-30 50 parts by weight Irgacure 184 2 parts by weight SX-350 (30%) 2.5 parts by weight Cross-linked acrylic-styrene particles (30%) 22 parts by weight Sol solution a-2 9.5 parts by weight Toluene 38.5 parts by weight ────────────────────────────────────

────────────────────────────────────
Composition of coating solution A-3-2 for antiglare hard coat layer────────────────────────────────── ──
PET-30 50 parts by weight Irgacure 184 2 parts by weight SX-350 (30%) 2.5 parts by weight cross-linked acrylic-styrene particles (30%) 22 parts by weight X-22-164C 0.3 parts by weight Sol solution a-2 9.5 parts by weight Toluene 38.5 parts by weight ─────────────────────────────────────

────────────────────────────────────
Composition of coating solution A-3-2 for antiglare hard coat layer────────────────────────────────── ──
PET-30 50 parts by weight Irgacure 184 2 parts by weight SX-350 (30%) 2.5 parts by weight crosslinked acrylic-styrene particles (30%) 22 parts by weight X-22-164C 0.6 parts by weight Sol solution a-2 9.5 parts by weight Toluene 38.5 parts by weight ─────────────────────────────────────

  The coating solution was filtered through a polypropylene filter having a pore diameter of 30 μm to prepare a coating solution for a light diffusion layer.

────────────────────────────────────
Composition of coating liquid B-1 for low refractive index layer ────────────────────────────────────
Fluoropolymer A (6%) 13 parts by weight MEK-ST-L (30%) 1 part by weight Sol solution a-1 0.5 part by weight MEK 5 parts by weight Cyclohexanone 0.5 part by weight ─────── ─────────────────────────────

────────────────────────────────────
Composition of coating liquid B-2 for low refractive index layer ────────────────────────────────────
Fluoropolymer A (6%) 13 parts by weight MEK-ST-L (30%) 1 part by weight Sol solution a-1 0.5 part by weight X-22-164C 0.5 part by weight MEK 5 parts by weight cyclohexanone 5 parts by weight─────────────────────────────────────

────────────────────────────────────
Composition of coating liquid B-3 for low refractive index layer ─────────────────────────────────────
Fluoropolymer A (6%) 13 parts by weight MEK-ST-L (30%) 1 part by weight Sol solution a-1 0.5 part by weight X-22-164C 1 part by weight MEK 5 parts by weight cyclohexanone 0.5 part by weight ────────────────────────────────────

  The solution was stirred and then filtered through a polypropylene filter having a pore size of 1 μm to prepare a coating solution for a low refractive index layer.

The compounds used are shown below.
PET-30: A mixture of pentaerythritol triacrylate and pentaerythritol tetraacrylate [manufactured by Nippon Kayaku Co., Ltd.]
・ Irgacure 184: Polymerization initiator [Ciba Specialty Chemicals Co., Ltd.]
SX-350: average particle size 3.5 μm cross-linked polystyrene particles [refractive index 1.60, manufactured by Soken Chemical Co., Ltd., 30% toluene dispersion, used after dispersion for 20 minutes at 10,000 rpm in a polytron disperser]
Crosslinked acrylic-styrene particles: average particle size 3.5 μm [refractive index 1.55, manufactured by Soken Chemical Co., Ltd., 30% toluene dispersion, used after dispersion for 20 minutes at 10,000 rpm with a Polytron disperser]
X-22-164C: Silicone compound [manufactured by Shin-Etsu Chemical Co., Ltd.]

Fluorine-containing polymer A: 80 g of the fluorine-containing polymer described in JP-A-11-189621, Example 1, 15 g of “Cymel 303” as a curing agent (Nippon Cytec Industries, Ltd., 2.0 g of “Catalyst 4050” as a curing catalyst) (Nihon Cytec Industries Co., Ltd. dissolved in MEK to 6% [refractive index 1.42, solid content concentration 6%]

MEK-ST-L: Colloidal silica dispersion [MEK-ST particle size difference, average particle size 45 nm, solid content concentration 30%, manufactured by Nissan Chemical Co., Ltd.]

(2) Coating of hard coat layer A triacetyl cellulose film (TAC-TD80U, manufactured by Fuji Photo Film Co., Ltd.) having a thickness of 80 μm is unrolled directly in a roll form, and 135 hard coat layer coating solutions are directly applied. / Inch, using a microgravure roll with a diameter of 50 mm having a gravure pattern with a depth of 60 μm and a doctor blade, the coating speed was 10 m / min, the coating was dried at 60 ° C. for 150 seconds, and further under a nitrogen purge, 160 W / Using an air-cooled metal halide lamp (produced by Eye Graphics Co., Ltd.), the coating layer was cured by being irradiated with ultraviolet rays having an illuminance of 400 mW / cm ² and an irradiation amount of 250 mJ / cm ² , and wound up. The film thickness of the hard coat layer was about 5 μm.

(3) Coating of low refractive index layer The triacetyl cellulose film coated with a hard coat layer is unwound again, and the coating liquid for the low refractive index layer has a gravure pattern of 200 lines / inch and a depth of 30 μm. Using a micro gravure roll with a diameter of 50 mm and a doctor blade, it was applied at a transfer speed of 20 m / min, dried at 120 ° C. for 75 seconds, further dried for 10 minutes, and then air-cooled metal halide at 240 W / cm under a nitrogen purge. Using a lamp (manufactured by Eye Graphics Co., Ltd.), an ultraviolet ray having an illuminance of 400 mW / cm ² and an irradiation amount of 240 mJ / cm ² was irradiated to form a low refractive index layer having a thickness of 100 nm and wound up.

(4) Saponification treatment of antireflection film After film formation, the sample was 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 prepared antireflection 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, a saponified antireflection film was produced.

(Evaluation of optical film and antireflection film)
・ Abrasion resistance <Steel wool scratch resistance evaluation>
A rubbing test was performed using a rubbing tester under the following conditions to evaluate the scratch resistance.
Evaluation environmental conditions: 25 ° C., 60% RH
Rubbing material: Steel wool (Nippon Steel Wool Co., Ltd., gelled No. 0000)
Wrap around the tip (1cm x 1cm) of the scraper of the tester that comes into contact with the sample and fix the band.
Travel distance (one way): 13cm
Rubbing speed: 13 cm / second,
Load: 500 g / cm ²
Tip contact area: 1 cm × 1 cm, rubbing frequency: 10 reciprocations.
An oil-based black ink was applied to the back side of the rubbed sample, and scratches on the rubbed portion were visually observed with reflected light, and evaluated according to the following criteria.
A: Even if looked very carefully, no scratches were visible.
○: Slightly weak scratches are visible when viewed very carefully.
○ △: Weak scratches are visible.
Δ: Medium scratches are visible.
X: There is a scratch that can be seen at first glance.

<Haze>
The total haze (H), internal haze (Hi), and surface haze (Hs) of the obtained film were measured by the following measurements.
[1] The total haze value (H) of the film obtained according to JIS-K7136 was measured.
[2] A few drops of silicone oil are added to the front and back surfaces of the obtained optical film, and two glass plates (micro slide glass product number S9111, manufactured by MATSUNAMI) with a thickness of 1 mm are sandwiched from the front and back to completely Two glass plates and the obtained film were optically adhered, and the haze was measured with the surface haze removed, and the haze measured by sandwiching only silicone oil between two separately measured glass plates. The subtracted value was calculated as the internal haze (Hi) of the film.
[3] A value obtained by subtracting the internal haze (Hi) calculated in [2] from the total haze (H) measured in [1] was calculated as the surface haze (Hs) of the film.

<Dynamic friction coefficient>
The dynamic friction coefficient was evaluated as an index of surface slipperiness. As the dynamic friction coefficient, a sample was conditioned at 25 ° C. and a relative humidity of 60% for 2 hours, and then a value measured with a HEIDON-14 dynamic friction measuring machine at a 5 mmφ stainless steel ball, a load of 100 g, and a speed of 60 cm / min was used.

  From the results of Table 1, it can be seen that the scratch resistance is improved by setting the dynamic friction coefficient to 0.3 or less. Further, comparing HC1 to HC3 and HC7 to 9, it can be seen that the scratch resistance is improved by making the surface haze 20% or less. HC-2, 3, 5, 6 of the present invention and Ln-2, 3, 5, 6 provided with a low refractive index layer are excellent in scratch resistance, and a display device using these has less whitening and visibility. A good display image was obtained.

[Example 2]
Using the coating liquid (A-1-2) of Example 1, coating was performed under the same conditions except that the nitrogen flow rate during curing and the lamp irradiation amount were changed, and the double bond residual ratio (B / A) in the hard coat was applied. ) Was prepared.

(Evaluation of optical film)
Haze and scratch resistance were evaluated in the same manner as in Example 1. Further, the double bond residual ratio (B / A) on the surface of the hard coat layer was determined by the method for measuring the amount of double bonds on the surface described in the text 4- (4).

  In the present invention, it was possible to further improve the scratch resistance by optimizing the double bond residual ratio of the hard coat layer. A comparison of HC-10 to HC13 shows that the scratch resistance is improved by setting the residual ratio of double bonds to 0.5 or less. However, when the double bond residual ratio is small, curling tends to deteriorate due to the progress of curing shrinkage.

[Example 3]
(Preparation of coating liquid for hard coat layer (A-4))
90 parts by mass of MEK, 10 parts by mass of cyclohexanone, 85 parts by mass of partially caprolactone-modified polyfunctional acrylate (DPCA-20, manufactured by Nippon Kayaku Co., Ltd.), KBM-5103 (silane coupling agent: Shin-Etsu Chemical Co., Ltd.) 10 parts by mass), 5 parts by mass of a photopolymerization initiator (Irgacure 184, manufactured by Ciba Specialty Chemicals Co., Ltd.) and 0.5 parts by weight of X-22-164C were added and stirred. The solution was filtered through a polypropylene filter having a pore size of 0.4 μm to prepare a coating solution (A-4) for a hard coat layer.
Using the coating liquid (A-4) obtained here, coating was performed under the same conditions as in Example 1 except that the amount of the coating liquid was adjusted, and a sample with a changed film thickness was produced.
(Evaluation of optical film)
In the same manner as in Example 2, the haze, scratch resistance evaluation, and double bond residual ratio (B / A) measurement on the hard coat layer surface were performed.

  In the present invention, it can be seen that the scratch resistance is improved by increasing the thickness of the hard coat layer. However, Sample HC-17 having a film thickness exceeding 30 μm had a large curl, which was a practically lower limit level.

[Example 4]
75 parts by weight of toluene, 25 parts by weight of PET-30 (manufactured by Nippon Kayaku Co., Ltd.), 25 parts by weight of M-215 (manufactured by isocyanuric acid EO-modified diacrylate Toagosei Co., Ltd.), X-22-164C [Manufactured by Shin-Etsu Chemical Co., Ltd.] 0.5 parts by weight, 9.5 parts by weight of sol liquid a-2, and 2 parts by weight of Irgacure 184 (manufactured by Ciba Specialty Chemicals) were added and stirred. It filtered with the polypropylene filter with the hole diameter of 0.4 micrometer, and prepared the coating liquid (A-5) for hard-coat layers.
Using the coating solution (A-5) obtained here, coating was carried out under the same conditions as in Example 1 except that the nitrogen flow rate during curing, the lamp irradiation amount, and the coating solution amount were adjusted. Samples with different thickness and double bond residual ratio (B / A) were prepared.
(Evaluation of optical film)
In the same manner as in Example 2, the haze, scratch resistance evaluation, and double bond residual ratio (B / A) measurement on the hard coat layer surface were performed. Further, curl was evaluated by the method described in the text 4- (5).

  From the results shown in Table 4, in HC-19 to HC-21, the scratch resistance is improved and the curl is improved by increasing the film thickness of the optical film or decreasing the residual ratio of the double bond. It can be seen that the deterioration of the is improved.

Claims (10)

An optical film having at least one layer of the hard coat layer comprising a light-transmissive resin on a transparent substrate, the outermost layer of the film is less surface haze is 20%, the dynamic friction coefficient mu _k is 0.30 or less An optical film characterized in that   The optical film according to claim 1, wherein the hard coat layer has a thickness of 8 to 30 μm.   The hard coat layer can be formed by a crosslinking reaction or a polymerization reaction of an ionizing radiation curable compound, and the hard coat layer has a surface double bond amount A before curing and a residual surface double bond amount after curing. 3. The optical film according to claim 1, wherein a ratio (B / A) to B is in a range of 0.05 ≦ B / A ≦ 0.5.   The hard coat layer is a layer obtained by curing a curable composition containing a compound having two or more ethylenically unsaturated groups and one or more isocyanurate rings in the same molecule. 4. The optical film according to any one of 3.   The optical film according to claim 1, wherein the hard coat layer contains at least one fluorine compound and / or at least one silicone compound as an additive. Transparent support hard coat layer comprising a light-transmissive resin on the body an optical film having at least one layer, the outermost layer of the film is, the surface haze is 10% or less, the dynamic friction coefficient mu _k is 0.30 or less An optical film characterized in that   The optical film as described in any one of Claims 1-6 WHEREIN: It has a low-refractive-index layer whose refractive index is smaller than a transparent support body as said outermost layer, The antireflection film characterized by the above-mentioned.   The antireflection film according to claim 7, wherein the low refractive index layer contains at least one fluorine compound and / or at least one silicone compound as an additive.   It is a polarizing plate which has a polarizer between two protective films, Comprising: At least one of this protective film is an optical film as described in any one of Claims 1-6, or any one of Claims 7-8. A polarizing plate, which is the antireflection film according to one item.   An image comprising the optical film according to any one of claims 1 to 6, the antireflection film according to any one of claims 7 to 8, or the polarizing plate according to claim 9. Display device.