TW201106006A - An anti-reflection film and a polarizing plate using the same - Google Patents

Abstract

To provide an anti-reflection film having anti-reflection function which is excellent in scratch resistance and anti-glare property and has a simple layer construction and can be produced with low cost and is suitably usable particularly for polarizing plates. The anti-reflection film has a construction in which a hard coat layer which is formed of a material for forming hard coat layer and a low refractive index layer having a refractive index of 1.43 or less and a thickness of 50 to 200 nm which contains a hardened resin obtained by irradiating with an active energy ray, the hard coat layer and the low refractive index layer being laminated on a surface of a transparent plastic film in this order and (1) the material for forming hard coat layer is a material which contains (A) a composition sensitive to an active energy ray containing (a) a multi-functional (meth)acrylate and (b) silica-based fine particles, (B) organic fine particles and (C) a dispersant having at least one polar group in a molecule and (2) the thickness of the hard coat layer is larger than the average particle diameter of the organic fine particles (B) and (3) the refractive index of the cured product of the composition sensitive to an active energy ray is 1.46 to 1.80.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antireflection film and a polarizing plate using the same, and in particular, the present invention relates to an antireflection function, and is also resistant to abrasion and glare. Preferably, the layer is simple in composition and low in cost, and is particularly suitable for an antireflection film for a polarizing plate, and a polarizing plate using the same. [Prior Art] In displays such as plasma display (PDP), video tube (CRT), liquid crystal display (LCD), etc., light is incident from the outside to the screen, and this light is reflected and it is difficult to view the display image, especially in recent years. The increase in the size of the display has gradually become an important issue for those who have solved the above problems. In order to solve such problems, various anti-reflection treatments or anti-glare treatments have been used for various displays. One of them is a method of using an antireflection film on various displays. In the conventional anti-reflection film, a dry process method such as vapor deposition or sputtering is used to form a film having a low refractive index (MgF2) on a substrate film or a substance having a high refractive index. [ITO (tin-doped indium oxide), Ti〇2, etc.] is produced by a method such as a substance having a low refractive index [MgF2, Si〇2, etc.]. However, the antireflection film produced by the dry process method has a problem that manufacturing cost cannot be avoided. Therefore, in recent years, attempts have been made to produce an antireflection film by a wet process, that is, a coating method. However, the antireflection film produced by the wet process method has a problem that the scratch resistance of the surface is deteriorated as compared with the antireflection film 201106006 produced by the dry process described above. Therefore, in order to solve the aforementioned problems in the wet process method, the electrodeposited radiation-curable resin composition is used to further form a hardened layer (hard coating layer). For example, the following optical film is disclosed, that is, on the substrate film, (i) sequentially laminated: a hard coating layer having a hardening resin hardened by ionizing radiation and having a thickness of 2 to 20 #m a high refractive index layer having a thickness of 60 to 160 nm having a refractive index in the range of 1.65 to 1.80 and a hardening resin hardened by ionizing radiation and at least two kinds of metal oxide containing cerium-doped tin oxide And an optical film comprising a low refractive index layer having a refractive index of from 0.87 to 1.47 and having a thickness of from 80 to 180 nm (for example, see Patent Document 1); (2) sequential lamination : a hard coating layer containing a metal oxide and a cured product hardened by heat or ionizing radiation, and having a thickness of 2 to 20 μm; and a porous cerium oxide and a polyoxyalkylene-based polymer, and having a refractive index An optical film (see, for example, Patent Document 2) having a low refractive index layer having a thickness of 40 to 200 nm in the range of 1.30 to 1.45 (see, for example, Patent Document 2). These optical films are effective for preventing light reflection on the surface of an image display element and are excellent anti-reflection films. Among the optical films used in the above-mentioned respective displays, in recent years, in terms of cost, the demand for multifunctional optical films has been increasing in order to reduce the amount of optical films. The multi-functional optical film may, for example, be an optical film having at least two or more functions selected from the following, that is, an anti-reflection function is used as the first scratch resistance, and is prevented from being mapped by an indoor light source such as a fluorescent lamp. Anti-glare function of 201106006 such as flash spot, PDP, more near-infrared blocking function, anti-charge function, anti-fouling function. OBJECTS OF THE INVENTION PROBLEMS TO BE SOLVED BY THE INVENTION The present invention is an invention created under the above circumstances. The object of the invention is to provide an anti-reflection film which has an anti-reflection function, is excellent in scratch resistance and anti-glare property, has a simple layer structure and is low in cost, and is particularly suitable for a polarizing plate. Means for Solving the Problems The inventors of the present invention have intensively studied in order to achieve the above object, and as a result, it has been found that an active energy ray-inducing type composition having a refractive index of a cured product containing cerium oxide-based fine particles in a predetermined range is used. a hard coating layer forming material of the material, the organic fine particles, and a dispersing agent having at least one polar group in the molecule to form a hard coating layer, and the hard coating layer is provided to be hardened by irradiation with an active energy ray This can be achieved by hardening a resin and having a refractive index of a predetermined thickness below a certain thickness. The present invention has been completed in accordance with this finding. That is, the present invention provides that: [1] an anti-reflection film is attached to the surface of a transparent plastic film, sequentially laminated: a hard coating layer formed using a hard coating layer forming material; and containing an active energy ray An antireflection film comprising a cured resin having a cured refractive index and a refractive index of 1.43 or less and a low refractive index of 201,106,006 having a thickness of 50 to 200 nm, wherein: (the hard coating layer forming material contains: (Α) An active energy ray-sensitive composition containing (a) a polyfunctional (meth) acrylate and (b) cerium oxide-based fine particles, (B) an organic fine particle ' and (C) having at least one polar group in the molecule The material of the dispersant; (2) the film thickness of the hard coating layer is larger than the average particle diameter of the (B) organic fine particles; and (3) the refraction of the hardened material of the (A) active energy ray-inductive composition [2] The antireflection film according to the above [1], wherein (C) a dispersant having at least one polar group in the molecule, having a functional group selected from the group which exhibits acidity and 1 At least one of the ~3 amine groups as a polar group: [3 The antireflection film according to the above [2], wherein (C) the dispersant having at least one polar group in the molecule has an N,N-dialkylamino group: [4] as described above [1] The antireflection film according to any one of [3], wherein (b) the cerium oxide-based fine particles are cerium oxide microparticles having a (meth)acryl fluorenyl group as a surface functional group; [5] The antireflection film according to any one of the above [1] to [4] wherein (B) the organic fine particles have an average particle diameter of 6 to 10 μm: [6] as in the above [1] to [5] The antireflection film according to any one of the invention, wherein (a) the refractive index difference between the cured product of the active energy ray-sensitive composition and (B) the organic fine particles is 0.1 or less; [7] as described in [1] to [6] above; The anti-reflection film according to any one of the items [1] to [7], wherein the low refractive index layer contains the porous cerium oxide in an amount of from 30 to 80% by mass. The anti-reflection film, wherein the outer surface of the film is 20% or less; [9] A polarizing plate having an anti-reflection film according to any one of the above [1] to [8]. Effect of the Invention According to the present invention, a It has an anti-reflection function, is excellent in scratch resistance and anti-glare property, has a simple layer structure and low cost, and is particularly suitable for an anti-reflection film for a polarizing plate, and a polarizing plate using the same. In the film, a hard coating layer formed on at least one surface of a transparent plastic film is formed by using a hard coating layer forming material having the following composition. [Hard coating layer forming material] The hard coating layer forming material of the present invention contains (A) active energy ray-inductive composition, (B) organic fine particles, and (C) a dispersing agent having at least one polar group in the molecule" ((A) active energy ray-sensitive composition) In the forming material, the active energy ray-inductive composition as the component (A) contains (a) a polyfunctional (meth) acrylate and (b) cerium oxide-based fine particles as essential components. In the present invention, the active energy ray means an energy quantum in an electromagnetic wave or a charged particle beam, that is, an ultraviolet ray or an electron beam. Further, the term "(meth)acrylate" means methacrylate and acrylate. 201106006 < (a) Polyfunctional (meth) acrylate. In the present invention, (a) polyfunctionality ( As the methyl acrylate, a polyfunctional (meth) acrylate monomer and/or a (meth) acrylate prepolymer is used. Examples of the polyfunctional (meth)acrylate monomer include 1,4-butylene glycol di(meth)acrylate, 1,6-hexanediol di(meth)acrylate, and Neopentyl glycol (meth)acrylate, polyethylene glycol di(meth)acrylate, neopentyl glycol di(meth)acrylate, dicyclopentanyl (meth)acrylate, Dicyclopentyl (meth)acrylate modified by caprolactone, di(meth)acrylic acid phosphate modified by ethylene oxide, allylated cyclohexyl di(meth)acrylate, two (meth)acrylic acid isocyanate, trimethylolpropane tri(meth)acrylate, dineopentyl tris(meth)acrylate, and propionic acid modified trispentaerythritol (meth)acrylate Ester, neopentyl glycol tris(meth)acrylate, trimethylolpropane tris(meth)acrylate modified with propylene oxide, tris(propyleneoxyethyl)isocyanate, modified with propionic acid Pentaerythritol penta(meth)acrylate, dipentaerythritol hexa(meth)acrylate, modified by caprolactone Six polyfunctional (meth) acrylic acid esters of pentaerythritol new (meth) acrylate. These monomers may be used alone or in combination of two or more. On the other hand, the (meth) acrylate-based prepolymer may, for example, be a polyester acrylate type, an epoxy acrylate type, an amino carboxylic acid acrylate type, or a polyol acrylate type. Here, the polyester acrylate-based prepolymer can be, for example, a hydroxyl group of a polyester oligomer having a hydroxyl group at both terminals obtained by condensation of a polyvalent carboxylic acid and a polyvalent alcohol by (meth)acrylic acid. The ester 201106006 is obtained by esterification of a hydroxyl group at the end of the oligomer obtained by adding an alkylene oxide to a polyvalent carboxylic acid by (meth)acrylic acid. The epoxy acrylate-based prepolymer can be produced, for example, by reacting (meth)acrylic acid with an oxirane ring of a relatively low molecular weight bisphenol type epoxy resin or a novolac type epoxy resin for esterification. Got it. A urethane acrylate based prepolymer, for example, which can be esterified by a reaction of a polyether polyol or a polyester polyol with a polyisocyanate by (meth)acrylic acid. Made by. Further, the polyol acrylate-based prepolymer can be obtained by esterifying a hydroxyl group of a polyether polyol with (meth)acrylic acid to obtain the above-mentioned polyfunctional (meth)acrylate-based prepolymer. The weight average molecular weight is preferably selected from the range of 50,000 or less, particularly preferably 500 to 50,000, more preferably 3,000 to 40,000, as measured by the GPC method in terms of standard polymethyl methacrylate. These prepolymers may be used singly or in combination of two or more kinds, or may be used in combination with the above-mentioned polyfunctional (meth) acrylate monomer. <(b) cerium oxide-based fine particles. In the present invention, (b) cerium oxide-based fine particles may be colloidal cerium oxide-based fine particles and/or cerium oxide-based fine particles having surface functional groups. The colloidal cerium oxide-based fine particles having an average particle diameter of about 400 nm, and the cerium oxide-based fine particles having a surface functional group, for example, a group having a (meth)acryl fluorenyl group as a surface functional group. Cerium oxide-based fine particles (hereinafter referred to as reactive cerium oxide-based fine particles). The above-mentioned reactive cerium oxide-based fine particles can be, for example, an organic compound having a polymerizable unsaturated group having a functional group reactive with 201106006 sterol groups, and cerium oxide-based particles having an average particle diameter of 0.005 to 1 μm. The surface sterol group is reacted to obtain. The polymerizable unsaturated group 'is, for example, a (meth)acryl fluorenyl group which is radically polymerizable. The above-mentioned organic compound having a polymerizable unsaturated group capable of reacting with a sterol group, for example, a compound represented by the general formula (1) or the like can be preferably used, R1

I GH2 = C - COR2 · · · (I) (wherein R1 is a hydrogen atom or a methyl group, and R2 is a halogen atom or a group represented by the following formula). OCH2CH2NGO, one OCH2CH — CH2, one OCH2CH — GHe V \/

Ο N Η OCH2CH2OH, mono-OH, mono 0(CH2)3 - SI(OCH3)3 Such compounds, for example, acrylic acid, chlorinated acrylic acid, 2-isocyanatoethyl acrylate, glycidyl acrylate, acrylic acid 2 can be used. 3-i-propyl propyl ester, 2-hydroxyethyl acrylate, propylene methoxy propyl trimethoxy decane, and the like, and methacrylic acid derivatives corresponding to the acrylic acid derivatives. These acrylic acid derivatives or methacrylic acid derivatives may be used alone or in combination of two or more kinds of cerium oxide-based fine particles bonded with an organic compound containing a polymerizable unsaturated group, which is an active energy ray hardening. The component is hardened by crosslinking by irradiation of an active -11-.201106006 energy ray. This reactive cerium oxide-based fine particle has an effect of improving the scratch resistance of the resulting anti-reflective film. An active energy ray-inductive composition (A) containing a compound in which an organic compound having a polymerizable unsaturated group is bonded to a ruthenium-based granule, and is commercially available as iSR Co., Ltd. The name is "〇pstar Z75 30", "〇pstar Z75 24", "Opstar TU4086", etc. In the present invention, the content of the cerium oxide-based fine particles of the component (b) is usually 5 to 90% by mass, preferably 1 〇%, based on the solid content of the active energy ray-sensitive composition of the component (A). 70% by mass. The average particle diameter of the cerium oxide particles of the cerium oxide-based fine particles of the component (b) can be measured by a laser diffraction method. In this method, the average particle diameter is measured by the intensity change of the diffracted and scattered light when the laser light is irradiated onto the liquid in which the particles are dispersed. The (A) active energy ray-inductive composition is cured. The refractive index is selected in the range of 1.46 to 1.80, preferably 1.49 to 1.75. If the refractive index of the cured product is in the above range, the resulting antireflection film can exhibit a good antireflection function. (B) Organic fine particles In the hard coating layer forming material of the present invention, examples of the organic fine particles as the component (B) include polyoxyalkylene-based fine particles, melamine-based fine particles, acrylic fine particles, and acrylic-styrene. Examples are fine particles, polycarbonate fine particles, polyethylene fine particles, polystyrene fine particles, and benzoguanamine resin fine particles. -12- 201106006 The shape of the organic fine particles is not particularly limited. However, in order to maximize the effect of the present invention for suppressing the sedimentation of the organic fine particles by the (c) dispersant described later, the organic fine particles are preferably spherical. . Further, from the viewpoint of homogenizing the anti-glare function of the hard coating layer and improving the reproducibility, it is preferably spherical. From the same point of view, it is preferred that the particle size distribution is narrow. That is, the organic fine particles are preferably spherical, and the average particle diameter is preferably from 6 to 10; c/m from the viewpoint of antiglare performance. The particle size distribution is preferably 70% or more by weight fraction within a range of ± 2 / / m of the average particle diameter measured by the Cote particle counting method. The method for measuring the average particle diameter will be described later. In the present invention, the organic fine particles of the component (B) may be used singly or in combination of two or more kinds, and the amount of the compound may be relative to the activity of the component (A) from the viewpoint of antiglare performance. The amount of the solid portion of the energy ray-sensitive composition is preferably from 0.1 to 30 parts by mass, particularly preferably from 1 to 20 parts by mass, per 100 parts by mass of the solid content. In the present invention, the "cured material of the active energy ray-sensitive composition of the component (A)" and the organic fine particles of the component (B) can be selected for various refractive index differences depending on the purpose. This refractive index difference, for example, when the antireflection film is formed into a high contrast type, is preferably such that the absolute enthalpy of the refractive index difference is small in such a manner that the internal haze is not exhibited, and it is preferable that 〇 〇 〇 〇 3 is preferable. For 〇~〇.〇2. Further, when the antireflection film is formed into a general-purpose type, it is preferable that the internal haze is controlled to be '0.03 to 0.2, particularly preferably 〇.〇4. That is, the refractive index difference is generally preferably 0.2 or less, and more preferably 〇" or less. Active energy ray-inductive type -13- 201106006 The method of measuring the cured product of the composition and the refractive index of the organic fine particles will be described later. (c) Dispersing agent In the hard coating layer forming material of the present invention, a dispersing agent as the component (c) is a compound having at least one polar group in the molecule, and examples of the polar group include a carboxyl group and a hydroxyl group. And a sulfonic acid group, a 1-stage amine group, a 2-stage amine group, a 3-stage amine group, a guanamine group, a 4-stage ammonium salt group, a pyridinium salt group, a phosphonium salt group, a scale salt group, and the like. Among these, a carboxyl group, a sulfonic acid group, a 1 to 3 amino group, etc. are preferable. These polar groups can be introduced into one or a plurality of molecules. When a plurality of polar groups are contained in the molecule, a component in which each of the compounds having a polar group is bonded to each other is required. Examples of such a component include polyoxyalkylene glycol and the like. In this case, a polar group is present on the side. chain. The molecular weight of such a component is not particularly limited and can be selected from a wide range of hundreds to hundreds of thousands. The dispersing agent having at least one polar group in the molecule suppresses sedimentation of the spherical organic fine particles in the hard coating layer having a larger film thickness than the average particle diameter of the organic fine particles, and is adjacent to the surface of the hard coating layer. There are a large number of such particles, and have the effect of improving anti-glare properties. The mechanism is not clear, but it can be considered as shown below. The polar group in the dispersant is located on the surface of the organic fine particles, and as a result, the polarity of the surface of the organic fine particles changes, and the probability that the organic fine particles are present in the vicinity of the surface is increased, and as a result, the film is larger than the average particle diameter of the organic fine particles. Thickness, organic fine particles are also present in the vicinity of the surface of the hard coating layer, and the anti-glare property is improved by -14 to 201106006. Further, a preferred example of the polar group of the dispersing agent is exemplified by the carbon number of the alkyl group being 1~ a polar group of 8 N,N-dialkylamino. The compound having a reactive group is particularly preferably an N,N-diaminoalkanol having a dialkylamino group having 1 to 8 carbon atoms and having a polar group as a polar group from the viewpoint of availability. Specific examples of the N,N-dialkylaminoalkanol include N, methylaminoethanol, N,N-diethylaminoethanol, N,N-dipropylamine alcohol, and N. N-dibutylaminoethanol, N,N-dipentylaminoethanol, N, hexylaminoethanol, and the like, and a compound in which the alcohol moiety of these compounds is substituted with propanol or butanol. The two alkyl groups of the oxime, fluorene-dialkyl moiety may be different or different. Further, as a polydispersant having a plurality of polar groups derived from anthraquinone, fluorene-dialkylaminoalkanol, for example, a polyoxyalkylene glycol of a fluorene-fluorenyl-dialkylaminoalkanol is preferred. Specifically, a polyoxyalkylene glycol modified by hydrazine, hydrazine-dimethylethanol can be exemplified by hydrazine, hydrazine-diethylaminoethanol, polyoxyalkylene glycol, hydrazine, hydrazine- Dipropylaminoethanol-modified polyoxyalkylene alcohol, polyoxyalkylene glycol modified by hydrazine, hydrazine-dibutylaminoethanol, polyoxyalkylene modified by dipentylaminoethanol a polyoxyalkylene glycol modified by an alcohol, a hydrazine, a hydrazine-dihexylethanol, or a compound which substitutes an ethanol moiety of a compound with propanol or butanol, etc. In the present invention, a dispersant of the component (C) may be used. It is used alone or in combination of two or more. In addition, the amount of the anti-glare of the hard coating layer is derived from the combination of the alkane dioxime and the oxime-amine group of the ethylamine bismuthylene-di-ethyl amide group. -15- 201106006 The balance of the other physical properties, economy, etc. of the scratch resistance is preferably 0.01 to 10 parts by mass in terms of the amount of the active energy ray-sensitive composition of the component (A). (Photopolymerization initiator) In the hard coating layer forming material of the present invention, a polymerization initiator can be used. Examples of the photopolymerization initiator include benzoic acid methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin isobutyl ether, acetophenone, dimethylaminoacetophenone, and -2-phenylacetophenone. , 2,2-diethoxy-2-phenylacetophenone-1-phenylpropan-1-one, 1-hydroxycyclohexyl benzophenone, 2-ylthio)phenyl]-2·morpholine Base-propane-1·ketone' 4-(2-hydroxy-2(hydroxy-2-propyl) ketone, diphenyl ketone, p-phenyldiphenyldiethylaminodiphenyl ketone, dichlorodiphenyl Ketone, 2, methyl hydrazine, 2-tert-butyl hydrazine, 2, amino hydrazine, 2-methylethyl thioxanthone, 2-chlorothioxanthone, 2,4 dimethyl thioxanthene醑 thioxanthone, benzyl dimethyl ketal, acetophenone dimethylamino benzoate, etc. These may be used alone or in combination of two or more, in amounts relative to the full active energy ray. The hardening type compound 1 is generally selected in the range of 0.2 to 10 parts by mass. When the reactive amount of the hardening type compound is used, the reactive cerium oxide cerium oxide type fine particles are used. Modulation of the coating material of the coating layer) From the point of view, the relative solid content is 100 quality 05~5 Desirable, containing benzoin, benzoin n-butyl ether, 2,2-dimethoxy, 2-hydroxy-2-methyl-methyl-1-[4-(methyl ethoxy)phenyl group Ketone, 4,4 z -based oxime, 2-ethyl thioxanthone, 2-oxime, 2,4-diethyl ketal, p-dimethyl dimethyl, in addition to the mass parts, the so-called fully active energy system (b) -16-.201106006 The hard coating layer forming material used in the present invention may be added to the active energy ray-sensitive composition of the above component (A) in a predetermined ratio in a suitable solvent, if necessary. (B) component of organic fine particles, (dispersing agent of bismuth component and photopolymerization initiator and various added components used as desired, such as antioxidant, ultraviolet absorber, decane coupling agent, light stabilizer, homogenizing agent, elimination A foaming agent or the like is prepared by dissolving or dispersing. The solvent to be used in this case is, for example, an aromatic hydrocarbon such as hexane or heptane, or an aromatic hydrocarbon such as toluene or xylene. a halogenated hydrocarbon such as ethane chloride, an alcohol such as methanol, ethanol, propanol or butanol, acetone, a ketone such as a ketone, 2-pentanone, isophorone or cyclohexanone; an ester such as ethyl acetate or butyl acetate; a cellosolve such as ethyl cellosolve; and the like. The concentration and viscosity of the hard coating layer forming material are not particularly limited as long as they can be coated, and can be appropriately selected depending on the condition. [Transparent plastic film] The antireflection film of the present invention is obtained by using the above-mentioned hard coating. The layer forming material is formed on at least one surface of the transparent plastic film. The transparent plastic film is not particularly limited, and may be suitably used in a plastic film known as a conventional hard coating film for optical use. Such a transparent plastic film may, for example, be a polyester film such as polyethylene terephthalate, polybutylene terephthalate or polyethylene naphthalate, a polyethylene film or a polypropylene film. , cellophane, cellulose diacetate film, cellulose triacetate film, cellulose acetonide film, polyvinyl chloride film, polyvinylidene chloride film, polyethylene-17- 201106006 alcohol film, ethylene-vinyl acetate copolymerization Film, polystyrene film, polycarbonate Membrane, polymethylpentene film, polyfluorene film, polyether ether ketone film, polyether maple film, polyether phthalimide film, polyimine film, fluororesin film, polyamide film, acrylic resin film, A plastic film such as a decene oxime resin film or a cycloolefin resin film. These plastic films may be transparent or translucent, and may or may not be colored, and may be appropriately selected depending on the application. For example, when used as a protective layer for a liquid crystal display, it is preferably a colorless transparent film. The thickness of the plastic film is not particularly limited, and may be appropriately selected depending on the condition, and is generally 15 to 3004 m, preferably 30 to 200. The range of ym. Further, in order to enhance the adhesion to the layer provided on the surface, the plastic film may be subjected to a surface treatment on one side or both sides by an oxidation method or a roughening method as desired. Examples of the oxidation method include a corona discharge method, a plasma treatment, a chromic acid treatment (wet type), a flame treatment, a hot air treatment, an ozone/ultraviolet irradiation treatment, and the like, and the embossing method includes, for example, a sand blast method. , solvent treatment, etc. These surface treatment methods can be appropriately selected depending on the type of the plastic film, and it is generally preferable to use the corona discharge treatment method in terms of effects and operability. In addition, a puller layer can also be provided. [Formation of Hard Coating Layer] The hard coating layer forming material can be formed by a conventionally known method such as a bar coating method, a knife coating method, a roll coating method, a sheet coating method, a die coating method, a gravure coating method, or the like. The coating film is formed on at least one surface of the transparent plastic film, and after drying, the active energy ray is irradiated thereon to cure the coating film, thereby forming a hard coating layer. -18- 201106006 The active energy rays are, for example, ultraviolet rays and electron beams. The ultraviolet rays can be obtained by a high pressure mercury lamp, an electrodeless lamp, a metal halide lamp, a xenon lamp, or the like, and the irradiation amount is generally 100 to 500 mJ/cm 2 . On the other hand, the electron beam can be obtained by an electron beam accelerator or the like. Generally 150~3 50kV. Among the active energy rays, ultraviolet rays are particularly preferred. When an electron beam is used, a cured product can be obtained without adding a photopolymerization initiator. The thickness of the hard coating layer thus formed is required to be larger than the average particle diameter of the organic fine particles used in the present invention, and therefore, the lower limit is about 7/m, and as for the upper limit, the hardening of the hard coating layer is prevented. From the viewpoint of shrinkage to cause the hard coating film to be curled, a thickness of about 20//m» is preferably in the range of 8 to 15/zm. [Low Refractive Index Layer] In the antireflection film of the present invention, the hard coating layer thus formed is provided with a cured resin which is cured by irradiation with an active energy ray, and has a refractive index of 1.43 or less and a thickness of 50 Å. A low refractive index layer of 200 nm. The low refractive index layer may, for example, contain a polyfunctional (meth) acrylate described in the above-mentioned hard coating layer, and preferably a porous cerium oxide particle, and a photopolymerization initiator which is used as desired. The coating liquid for forming a low refractive index layer is formed by coating a hard coating layer to form a coating film, and irradiating an active energy ray to cure the coating film. The cured resin which is cured by irradiation with an active energy ray contained in the low refractive index layer is an active energy ray which is irradiated to the polyfunctional (meth) acrylate described in the hard coating layer and is used as desired. The above-mentioned photopolymerization -19-201106006 is prepared by combining the initiator and various additives, and can be selected from the same range as the formulation and physical properties. The porous cerium oxide particles contained in the low refractive index layer preferably have a specific gravity of 1.7 to 1.9, a refractive index of 1.25 to 1.36, and an average particle diameter of 20 to 100 nm. By using the porous ceria particles having such a property, an antireflection film having excellent antireflection properties can be obtained as a single layer type antireflection film. In the present invention, the content of the porous cerium oxide particles contained in the low refractive index layer is preferably selected from the range of 30 to 80% by mass, more preferably 50 to 80% by mass, particularly preferably 60. ~75% by mass range. When the content of the porous cerium oxide particles is in the above range, the low refractive index layer can have a layer having a desired low refractive index, and the obtained lipid antireflection film is excellent in antireflection property. The low refractive index layer has a thickness of 50 to 200 nm and a refractive index of 1.43 or less, preferably 1.30 to 1.42. When the thickness and refractive index of the low refractive index layer are in the above range, an antireflection film excellent in antireflection performance and scratch resistance can be obtained. The thickness of the low refractive index layer is preferably from 70 to 130 nm, and the refractive index is particularly preferably in the range of 1.35 to 1.40. In the coating liquid for forming a low refractive index layer used in the present invention, the polyfunctional (meth) acrylate, and preferably porous cerium oxide particles, may be added in a predetermined ratio in a suitable solvent, if necessary. And the above-mentioned photopolymerization initiator used as desired, and various additives such as an antioxidant, an ultraviolet absorber, a light stabilizer, a leveling agent, an antifoaming agent, etc., -20- 201106006 and by dissolving or dispersing Modulated. The solvent to be used at this time can be selected from the same range as the solvent exemplified in the description of the hard coating layer. The concentration and viscosity of the coating liquid thus prepared are not particularly limited as long as they are the concentration and viscosity that can be coated, and can be appropriately selected depending on the conditions. The coating liquid for forming a low refractive index layer can be coated on the hard coating layer by a conventionally known method such as a bar coating method, a knife coating method, a roll coating method, a sheet coating method, a die coating method, a gravure coating method, or the like. After forming a coating film and drying it, the active energy ray is irradiated thereon to cure the coating film to form a low refractive index layer. The active energy ray used in the formation of the low refractive index layer is the same as that described above for the hard coating layer. [Production of Antireflection Film] For the method of producing the antireflection film of the present invention, for example, the method shown below can be employed. First, the hard coating layer forming material is applied onto one surface of the transparent plastic film by the above method, dried to form a coating film, and then irradiated with an active energy ray to be hardened to form a hard coating layer. Then, the coating liquid for forming a low refractive index layer is applied onto the hard coating layer in the same manner as described above, dried to form a coating film, and then irradiated with an active energy ray to be cured to form a low refractive index layer. The antireflection film of the present invention was produced. When the hard coating layer is formed, the active energy ray can be irradiated so as to be a hardened layer of a semi-hardened layer - 201106006. When the low refractive index layer is formed, the semi-hardened hardened layer of the lower layer is completely cured at the same time. A hard coating layer is formed. [Optical Characteristics of Antireflection Film] The optical characteristics of the antireflection film of the present invention thus formed are different depending on the form. For high contrast type, the internal haze is generally 0~10%. Even if the internal haze is within this range and a flare is generated, a high contrast can be achieved, so that it can be sufficiently applied depending on the type of display (design commemoration). When the internal haze is more than 10%, high contrast cannot be obtained (becomes a general-purpose type). In addition, when it is a general-purpose type, the internal haze is generally 5 to 40%. When the internal haze is less than 5%, the performance of suppressing the flare is insufficient, and when it exceeds 40%, the visibility is lowered. The preferred internal haze of the general-purpose antireflection film is generally 10 to 35%, preferably 15 to 30%. Further, the external haze is preferably 20% or less in terms of visibility and high-contrast type and general-purpose type, and is preferably 5% or more from the viewpoint of anti-glare property. The external haze is obtained by measuring the total haze 内部 and the internal haze of the anti-reflection film, and subtracting the difference after the internal haze from the total haze 値. Further, the reflectance at a wavelength of 500 to 700 nm is generally 4% or less, preferably 3% or less, 60° gloss 値, and the high contrast type and the general use type are preferably 20 to 95. When the 60° gloss 値 exceeds 95, the surface gloss becomes large (reflection of light becomes large), and the anti-glare property is adversely affected. When the 60° gloss 値 is less than 20, whitening is liable to occur. Further, the total light transmittance of the antireflection film is preferably from 8 8 % -22 to 201106006 or more, and more preferably 90% or more. When the total light transmittance is less than 88%, there is a concern that the transparency is insufficient. The measurement method of the optical specific enthalpy will be described later. [Other functional layer] In the antireflection film of the present invention, the antifouling coating layer may be provided on the low refractive index layer. The antifouling coating layer can be generally coated with a fluorine-based resin by a conventionally known method such as a bar coating method, a knife coating method, a roll coating method, a sheet coating method, a die coating method, a gravure coating method, or the like. The liquid is coated on the low refractive index layer to form a coating film, and is formed by a drying treatment. The thickness of the antifouling coating layer is usually from 1 to 10 nm, preferably from 3 to 8 nm. By providing this antifouling coating layer, the resulting antireflection film has a smooth surface roughness and is less likely to be contaminated. In addition, the antistatic property can be improved by the difference in the type of the antifouling coating layer. [Adhesive layer] In the antireflection film of the present invention, an adhesive layer for adhering to an adherend such as a liquid crystal display can be formed on a surface of the plastic film opposite to the low refractive index layer. As the adhesive constituting the adhesive layer, for example, an acrylic adhesive, an urethane-based adhesive, or a polyoxyalkylene-based adhesive suitable for optical use is preferably used. The thickness of the adhesive layer is generally 5 to 1 Å / zm, preferably 1 〇 to 6 〇 vm. Further, on the adhesive layer, a release sheet may be provided as necessary. Examples of the release sheet include a release agent such as a polyoxymethylene resin coated on various plastic films such as polyethylene terephthalate or polypropylene, -23-201106006, and the like. The thickness of the release sheet is not particularly limited, and is generally 20 to 150 /zm. 3. An antireflection film having such an adhesive layer is formed, and is suitable for imparting antireflection performance, antiglare property, and scratch resistance to a CRT. , LCD, PD P and other displays, especially suitable for LCD and other polarizing plate adhesion. [Polarizing Plate] The present invention also provides a polarizing plate having the above-described antireflection film of the present invention on the surface. The liquid crystal cell of the LCD generally has the following structure, that is, two transparent electrode substrates on which the alignment layer is formed are disposed such that the alignment layer is located inside and a predetermined interval is formed by the spacer, and the periphery is sealed to make the liquid crystal A structure in which a material is sandwiched between the two transparent electrode substrates and a polarizing plate is disposed on the outer surface of the two transparent electrode substrates. FIG. 1 is a perspective view showing a configuration of one example of the polarizing plate. As shown in the figure, the polarizing plate 10 generally has a three-layer structure in which a cellulose triacetate (TAC) film 2 and a double-sided structure bonded to both sides of a polyvinyl alcohol-based polarizer 1 are provided. The surface is formed with an adhesive layer 3 for adhering to an optical component such as a liquid crystal cell, and then the release sheet 4 is adhered to the adhesive layer 3. Further, on the surface of the polarizing plate opposite to the adhesive layer 3, a surface protective film 5 is generally provided. In the polarizing plate of the present invention, it is preferable that the hard coating layer and the low refractive index layer of the present invention are provided on the TAC film 2 provided on both sides of the polarizing material 1 and the TAC film. When the polarizing plate is provided with an adhesive layer 3,

When the sheet 4 and the surface protective film 5 are peeled off, the method of producing the polarizing plate of the present invention, for example, the hard coating layer of the present invention and the low-refraction bird of the present invention are provided on the side of the TAC-24-201106006 film 2 > Can be operated. Fig. 2 is a view showing an example of a polarizing plate of the present invention. First, a transparent plastic film having no optical anisotropic I substrate as in a TAC film is used, and the first layer 13 and the low refractive index layer 14 are formed on the one surface to form an antireflection film 15 a primer layer. 16, 16>, the TAC film 12 in which the hard coating layers 13 and 1 are not formed is laminated on one surface of the polarizer 11, and the front layer is laminated on the opposite surface. When the TAC film is used for the transparent plastic film, the laminate formed by the subsequent agent is used to enhance the adhesion, and the alkalizing treatment can be carried out in addition to the front and the back. Thereby, antireflection performance and antiglare property and the polarizing resistant plate 20 can be obtained. The polarizing plate 20 may also be provided with a peelable 5 as shown in the above-mentioned first FIG. 1 on the surface of the setting 14 or on the opposite side, and an adhesive layer for attaching to the liquid crystal part may be provided on the surface of the surface. Or peeling off the sheet 18. In the polarizing plate of the present invention, the liquid crystal cell of the LCD is used for the adjustment of the amount of light, the device for polarizing interference application, and the optical deficiency %. The present invention will now be described in detail by way of examples, but examples thereof. g layer. The film 12 of the cross-section mold shown below is taken as a hard coat of the invention. Next, an anti-reflection film 15 for the β-refractive-index layer 14 is used, and an optical head such as a surface protective film unit having a low-refractive-index layer having excellent scratch resistance by surface treatment can be used as a detector or the like. The present invention is not limited to -25-201106006. The characteristics of each example are obtained by the following methods. <Organic microparticles> (1) Average particle diameter The measurement was carried out by a Cot particle counting method. (2) Refractive index The refractive index of the organic fine particles is determined from the monomer composition of the organic fine particles and the average refractive index obtained from the mass ratio of the contained monomers. <Active energy ray-inductive composition> (3) Refractive index of cured product Each of the preparation examples is composed of an active energy ray-inducing composition (A), a photopolymerization initiator, and a diluent solvent. Coating agent. In the same manner as in the Example, this was applied to a TAC film [trade name "TAC80TD80ULH", manufactured by Fujifilm Co., Ltd.] to form a hard coating film for measuring the refractive index of the cured product. Using the Abbe refractometer manufactured by Atago Co., Ltd., the refractive index of the hard coating layer was determined as the refractive index of the cured product of the active energy ray-inductive composition. <Low-refractive-index layer> (4) Refractive index The coating agent 7 for a low refractive index layer was produced in accordance with Preparation Example 7 to be described later. This was applied to a surface of a TAM film (manufactured by Fujifilm Co., Ltd.) having a thickness of 80 M by coating with a wire bar so that the thickness of the cured film was about Ι.Ι/zm. After drying in an oven at 70 ° C for 1 minute, ultraviolet rays having a light amount of 500 m: T/cm 2 were irradiated with a high--26-201106006 pressure mercury lamp to form a low refractive index layer. The obtained low refractive index layer was obtained by an Abbe refractometer [Atago Corporation's product name "Abbe refractometer 4T", Na source wavelength: about 590 nm], and the refractive index was obtained as low refractive index. The refractive index of the layer. <Anti-reflection film> (5) Total light transmittance and total haze 値 The haze meter "NDH-2000" manufactured by Nippon Denshoku Industries Co., Ltd. was used, and the total light transmittance and total were measured in accordance with JIS K 7136. Haze is awkward. The total haze is the sum of the internal haze (internal haze 与) and the external haze caused by the surface irregularities. (6) Internal haze 値, external haze 2 2 parts by mass of isocyanate cross-linking agent [manufactured by Toyo Ink Co., Ltd., trade name "BHS-8515"] and 100 parts by mass of toluene are added to acrylic adhesive [made by Japan Carbide Co., Ltd. , the product name "PE-121"] 100 parts by mass to prepare an adhesive solution. The adhesive solution was applied to a polyethylene terephthalate film (manufactured by Toyobo Co., Ltd., trade name "A4300") having a thickness of 50/m, so that the thickness after drying was 20, and it was carried out at 100 ° C. The adhesive sheet was dried by drying for 3 minutes, and the prepared adhesive sheet was adhered to the hard coating layer of the hard coating film to form an internal haze 値 determination sample. The haze of the adhesive sheet and the internal haze 値 determination sample was measured, and the haze of the adhesive sheet was subtracted from the haze of the internal haze 値 determination sample as a hard coating. The internal haze of the film is 値. Further, the haze of the base film (cellulose triacetate) and polyethylene terephthalate used in the examples and the comparative examples was measured in the same manner as in the phase -27-201106006, and as a result, it was less than 0.01% or less. Can be ignored. The measurement of haze is the same as (5) above. (7) Evaluation of anti-glare property Under the fluorescent lamp, a sample in which an acrylic adhesive adhered to an acrylic resin blackboard [manufactured by Sumitomo Chemical Co., Ltd.] was visually observed under the fluorescent lamp, and the following criteria were used. To assess anti-glare. 〇: The anti-mapping performance of the fluorescent lamp is sufficient, and there is little whitening X: The mapping resistance of the fluorescent lamp is insufficient, or the mapping resistance of the fluorescent lamp is sufficient, but the degree of whitening is large to deteriorate the viewing property (8) 60 The gloss was measured by JIS K7105 using a gloss meter "VG2000" manufactured by Nippon Denshoku Industries Co., Ltd. (9) Pencil hardness The measurement was carried out in accordance with JIS K 5 400 using a pencil scraping film hardness tester "No5 5 3-Ml" manufactured by Yasuda Seiki Co., Ltd. (10) Reflectance The reflectance at a wavelength of 500 nm, 600 nm, and 700 nm was measured using a spectroscopic hardness tester "UV-3101PC" manufactured by Shimadzu Corporation. Preparation Example 1 Hard Coating Layer Coating Agent 1

A hard coating agent (A) active energy ray-inductive composition, manufactured by USR -28-201106006 Co., Ltd., trade name "〇pstarZ7 5 24", solid content concentration 70% by mass, reactive cerium oxide particles and more The total amount of the functional (meth) acrylate is 65 mass%, the photopolymerization initiator is 5% by mass, the butanone is 30% by mass, and the refractive index of the cured product is 1.50] 100 parts by mass, as (B) spherical organic fine particles of acrylic acid. Microparticles [manufactured by Kyoritsu Chemical Co., Ltd., polymethyl methacrylate crystal, average particle diameter 3 from m, refractive index 1.49] 1 1.25 parts by mass, as a dispersant of (C) dispersant having a tertiary amine as a polar group [product name "disperbyk 103" manufactured by BYK Japan Co., Ltd., solid content concentration: 40% by mass] 3 parts by mass, and 90 parts by mass of propylene glycol monomethyl ether as a diluent solvent are uniformly mixed to prepare a solid content of about 40% by mass. The coating material 1 for the hard coating layer. The formulation of the coating agent and the physical properties of the components are as shown in Table 1 above. Preparation Example 2 Coating Agent 2 for Hard Coating Layer (B) The spherical organic fine particles were changed to acrylic fine particles (polymethyl methacrylate crystal, manufactured by Kyoritsu Chemical Co., Ltd., average particle diameter: 5 μm, refractive index: 1.49) In the same manner as in Preparation Example 1, the coating material 2 for a hard coating layer having a solid content of about 40% by mass was prepared in the same manner as in Preparation Example 1. The preparation of the coating agent and the physical properties of the components are as shown in Table 1 above. Preparation Example 3 Coating agent for hard coating layer 3 (B) The spherical organic fine particles were changed to acrylic particles [Integrated Chemical Co., Ltd. The coating material 3 for a hard coating layer having a solid content of about 40% by mass was prepared in the same manner as in Example 1 except that the polymethyl methacrylate crystals, the average particle diameter of 8 gm, and the refractive index of 1.49 were 11.25 parts by mass. The formulation of the coating agent and the physical properties of the components are shown in Table 1. |1 -29-.201106006 Preparation Example 4 Hard coating layer coating agent 4 In addition to (B) spherical organic fine particles, acrylic particles (average particle diameter: 8/zm, refractive index: 1.55) 11.25 In the same manner as in Preparation Example 1, the coating material 4 for a hard coating layer having a solid content of about 40% by mass was prepared. The formulation of the coating agent and the physical properties of the components are shown in Table 1. Preparation Example 5 Hard coating layer coating agent 5 In addition to (B) spherical organic fine particles were changed to acrylic fine particles (average particle diameter: 8/m, refractive index: 1.55, 11.25 parts by mass) In the same manner as in Preparation Example 1, a coating material 5 for a hard coating layer having a solid content of about 40% by mass was prepared. The formulation of the coating agent and the physical properties of the components are as shown in Table 1-1. In the same manner as in Preparation Example 1, except that the coating agent 6 for the hard coating layer was used, the coating material 6 for a hard coating layer having a solid content of about 40% by mass was prepared. The formulation of the coating agent and the physical properties of the components are as shown in Table 1 above. Preparation Example 7 Polyfunctional (meth) acrylate (manufactured by Arakawa Chemical Co., Ltd., trade name "Beamset 575CB", solid content 100%] 100 parts by mass, and photopolymerization start 5 parts by mass of the product name "Irgacure 907", which is manufactured by Ciba Specialty Chemicals Co., Ltd., followed by a mixture of methyl isobutyl ketone (MIBK) in which porous cerium oxide is mixed [manufactured by Catalyst Chemical Industries Co., Ltd., The name "ELCOM RT- 1 002SIV", solid content 21% by mass, -30- 201106006 Porous cerium oxide: specific gravity 1.8, refractive index 1.3 0, average particle diameter 60 nm] 1200 parts by mass, the total solid content concentration becomes 2% by mass of the coating material was diluted with MIBK to prepare a coating material for a low refractive index layer. 7» Example 1 The coating material 1 for a hard coating layer obtained in Preparation Example 1 was used so that the cured film thickness became about 10/zm. In the manner, it was applied to the surface of a cellulose triacetate (TAC) film (manufactured by Fujifilm Co., Ltd.) having a thickness of 80 by a wire bar coater. After drying in an oven at 70 ° C for 1 minute, ultraviolet rays having a light amount of 100 m J/cm 2 were irradiated with a high pressure mercury lamp to obtain a hard coating layer in a semi-hardened state. Then, the coating material 7 for a low refractive index layer obtained in the preparation example was applied to the hard coating layer by a wire bar coater so as to have a cured film thickness of 100 nm, and was baked in an oven at 70 ° C for 1 minute. After drying, a high-pressure mercury lamp is irradiated with ultraviolet rays having a light amount of 50,000 m/cm 2 to form a low refractive index layer, and the hard coating layer is completely cured to obtain an antireflection film. The performance and other contents of this antireflection film are shown in Tables 1 to 1 and Table 1-2. Example 2 The same operation as in Example 1 was carried out except that the coating material 2 for a hard coating layer obtained in Preparation Example 2 was applied by a wire bar coater so that the thickness of the cured film was about 10 Vm. An antireflection film is produced. The properties and other contents of this antireflection film are shown in Tables 1 to 1 and Table 2-2. Example 3 The same procedure as in Example 1 was carried out except that the coating material 3 for a hard coating layer obtained in Preparation Example 3 was applied by a wire bar coater so that the thickness of the cured film was about 3,000 Å. An antireflection film is produced by operation. The properties and other contents of this antireflection film are shown in Tables 1 to 1 and Table 2-2. Example 4 The same operation as in Example 1 was carried out except that the coating material 4 for hard coating layer obtained in Preparation Example 4 was applied by a wire bar coater so that the thickness of the cured film was about 10/m. An antireflection film is produced. The properties and other contents of this antireflection film are shown in Tables 1 to 1 and Table 2-2. Example 5 The same operation as in Example 1 was carried out except that the coating material 5 for a hard coating layer obtained in Preparation Example 5 was applied by a wire bar coater so that the thickness of the cured film was about ΙΟ/zm. An antireflection film is produced. The properties and other contents of this antireflection film are shown in Tables 1 to 1 and Table 2-2. Comparative Example 1 A hard coating film was produced in the same manner as in Example 1 except that the coating material 7 for a low refractive index layer obtained in Preparation Example 7 was not applied. The performance and other contents of the hard coating film are as shown in Table 1-1 and Table 1-2. Comparative Example 2 Except that the coating material 7 for low refractive index layer obtained in Preparation Example 7 is not applied, The same operation as in Example 2 was carried out to obtain a hard coating film. The properties and other contents of the hard coating are as shown in Table 1 and Table 1 and Table 2. Comparative Example 3 - 32 - .201106006 The performance of the hard hard coating film and other contents were obtained by the same operation as in Example 3 except that the low refractive index layer obtained in Preparation Example 7 was not applied. Table 1 - 1 and the first. Comparative Example 4 The performance of the hard hard coating film and other contents were obtained in the same manner as in Example 4 except that the low refractive index layer obtained in Preparation Example 7 was not applied, as shown in Table 1 And 0. Comparative Example 5 The performance of the hard hard coating film and other contents were obtained by the same operation as in Example 5 except that the low refractive index layer obtained in Preparation Example 7 was not applied. 1 - 1 and 0. Comparative Example 6 The same procedure as in Example 1 was carried out by applying the coating agent 6 for a hard coating layer obtained in Preparation Example 6 by a coater so that the thickness of the cured film was about 10 μm. An anti-reflective film is obtained. The properties of the film and other contents are as shown in the coatings of the first table-1 and the first table-2. This is a film of the coating agent 7 of Table 2. This is a film of the coating agent 7 of Table 2. This 1 table-2 is shown by the anti-reflection outside the wire bar. 33· .201106006 [Table 1-1] Refractive index (Y) refractive index difference (XY) of the spherical organic fine particle hardening resin with or without low refractive index layer hard coating agent Addition amount valence amount %) Average particle diameter (/zm) Refractive index (X) Addition amount (parts by mass) Example 1 Hard coating agent 1 17.3 3 L49 1.5 -0.01 3 Example 2 Hard coating agent 2 17.3 5 1.49 1.5 -0.01 3 Example 3 Hard Cladding agent 3 17.3 8 1.49 1.5 -0.01 1 Example 4 Hard coating agent 4 17.3 8 1.55 1.5 0.05 0.5 Example 5 Hard coating agent 5 17.3 8 1.55 1.5 0.05 1 Comparative Example 1 No hard coating agent 1 17.3 3 1.49 1.5 0.01 3 Comparative Example 2 dot Hard coating 2 1.3 5 1.49 1.5 -0.01 3 Comparative Example 3 frrr. m Hard coating 3 17.3 8 1.49 1.5 -0.01 1 Comparative Example 4 No hard coating 4 17.3 8 1.55 1.5 0.05 0.5 Comparison Example 5 No hard coating agent 5 17.3 8 1.55 1.5 0.05 1 Comparative Example 6 Hard coating agent 6 17.3 3 1.49 1.5 -0.01 0 [Note] 1) Addition amount of spherical organic fine particles: Inductive composition with respect to active energy ray The solid part of it. 2) Hardened resin: a cured product of an active energy ray-sensitive composition. -34- 201106006 [CN-撇I濉] Performance of antireflective film Refractive index of low refractive index layer 〇〇CO 〇〇CO OO cn OO CO OO CO r—H 1 1 1 1 1 1 Fresh hardness CO K cn ffi CO K CO cn ffi CO cn K CO K CO ffi CO K cn Anti-glare 〇〇〇〇〇〇〇〇〇〇X Reflectance (%) 700nm 2.47 v〇ν〇03 2.79 2.39 2.58 ! 3.99 r-H 4.06 4.13 cs 600nm 2.52 Η 3.09 2.72 2.85 4.09 4.02 4.09 4.23 〇! 2.46 500nm CN oo CN 3.52 CO cn 1 4.34 4.31 4.34 4.48 ON cn CSJ CO j I Μ ts OO VO 64.4 73.1 101.8 1 74.5 73.4 96.8 78.5 136.5 Haze 値% External haze 値vq oo 06 inch o 7.56 CO 1 i OO CN 11.0 v〇OO t < 0.72 Internal haze On3 On 29.46 m <N cn 25.8 28.8 3.33 Total haze 値7.96 14.22 15.28 37.56 42.56 m vd 1 14.19 11.79 32.29 40.51 4.05 Total light transmittance g 91.63 90.99 90.22 92.51 92.31 92.57 1 91.99 91.39 93.15 92.62 93.35 Example 1 Example 2 Example 3 Example 4 Example 5 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 Day u〇〇!:鹋»盈^挂寂干回ST /OI :鹋its^w瞍201106006 From the first table-1 and the first table-2, it is known that Examples 1 to 5 having a low refractive index layer and Comparative Example 1 having no low refractive index layer ~5, the reaction rate is reduced by about 1.5%. Further, from Examples 4 and 5, it is understood that the external haze 变化 can be changed with little change in the internal haze 由于 due to the difference in the amount of the dispersant added. Further, from Comparative Example 6, It can be seen that the anti-glare property is not exhibited in the series in which the dispersant is not added. Example 6 An acrylic pressure-sensitive adhesive layer having a thickness of 25 Mm was provided on the TAC film surface side of the antireflection film obtained in Example 1. A polarizer composed of a film having a thickness of 25/zm of a polyvinyl alcohol adsorbed by iodine was attached to the pressure-sensitive adhesive layer. On the other hand, an adhesive sheet having an acrylic pressure-sensitive adhesive layer having a thickness of 25 μm on both sides of a TAC film [manufactured by Fujifilm Co., Ltd.] having a thickness of 80/zm was produced. The surface of one of the adhesive sheets was bonded to the peeling-treated surface of the release sheet ("SP-PET 3811" manufactured by Linde Co., Ltd.). Then, the peeling surface of the polarizing member was brought into contact with the surface of the adhesive sheet which was not provided with the peeling sheet, thereby producing a polarizing plate. Industrial Applicability The antireflection film of the present invention has an antireflection function, is excellent in scratch resistance and antiglare property, has a simple layer structure, and is low in cost, and is particularly suitable for use in a polarizing plate such as an LCD. -36- 201106006 [Simple diagram 1st diagram 2nd diagram diagram. [Main components 1 2 2 ^ 3 4 5 10 11 12 12 ^ 13 14 15 16 16 / 17 18 20 Description] A perspective view showing a configuration of one example of a polarizing plate. The cross-sectional mode symbol showing the configuration of one example of the polarizing plate of the present invention] polyvinyl alcohol-based polarizing member TAC film TAC film adhesive layer peeling sheet surface protective film polarizing plate polarizing member TAC film TAC film hard coating layer low refractive index Anti-reflective film adhesive layer adhesive layer adhesive layer peeling sheet polarizing plate-37-

Claims (1)

201106006 VII. Patent application scope: 1. An anti-reflection film is attached to the surface of a transparent plastic film, sequentially laminated: a hard coating layer formed by using a hard coating layer forming material; and hardened by irradiation with active energy rays An antireflection film comprising a cured resin and a low refractive index layer having a refractive index of 1.43 or less and a thickness of 50 to 200 nm, wherein: (1) the hard coating layer forming material contains: (A) contains (a) An active energy ray-sensitive composition of a polyfunctional (meth) acrylate and (b) cerium oxide-based fine particles, (B) an organic fine particle, and (C) a dispersing agent having at least one polar group in the molecule (2) The film thickness of the hard coating layer is larger than the average particle diameter of the (B) organic fine particles; and (3) the refractive index of the hardened material of the (A) active energy ray-sensitive composition is 1.46. -1.80. 2. The antireflection film of claim 1, wherein (C) a dispersant having at least one polar group in the molecule has at least one selected from the group consisting of a functional group exhibiting acidity and an amine group of 1 to 3 grades. One or more kinds are used as polar groups. 3. The antireflection film of claim 2, wherein (C) the dispersant having at least one polar group in the molecule has an N,N-dialkylamino group. 4. The antireflection film according to any one of claims 1 to 3, wherein (b) the cerium oxide-based fine particles are silica sand particles having a (meth)acryl fluorenyl group as a surface functional group. . 5. The antireflection film according to any one of claims 1 to 3, wherein (B) the organic fine particles have an average particle diameter of 6 to 10 #m. 6. The antireflection film according to any one of claims 1 to 3, wherein (A) -38 - 201106006 # Μ* Μ县迪咸应11 Μ 化 1 1 机 1 微粒 微粒 Μ活性 The amount of active ffc is D, ' ^ rate difference is less than 0.1 ° 7. As in the patent application scope stomach 1 + film ' low refractive index layer containing porous silica sand is 30 ~ 80% by mass ° 8. As claimed The antireflection film of any one of items 1 to 3 wherein the external haze is less than 20%. A polarizing plate having an antireflection film on a surface thereof according to any one of claims 1 to 8. -39-