TW200844174A - Particles for anti-glare film, process for producing the same, and a composition containing particles for anti-glare film - Google Patents

Abstract

Disclosed is a particle for antiglare films, which is obtained by a process including a step for adding a predetermined polymerization component into an aqueous dispersion which contains a seed particle having a certain average particle size and composed of a polymer having a certain number average molecular weight, a step for adding a predetermined water-soluble polymer into the aqueous dispersion, and a step for polymerizing the polymerization component.

Description

.200844174 IX. Description of the invention [Technical field to which the invention pertains]

The present invention relates to particles for an anti-glare film, a method for producing the same, and a particle composition for an anti-glare film. More specifically, the dispersibility in polymerization in an aqueous solution and the dispersibility in an organic solvent are good, and excellent anti-offensive properties can be obtained. A particle for an anti-glare film of an optical material molded article having excellent glare properties and an anti-glare property and a white turbidity (transmissibility), a method for producing the same, and a particle composition for an anti-glare film. [Prior Art] Currently, liquid crystal display devices are being used as display devices for televisions, personal computers, and the like. In the case where the transmitted light or the reflected light is improperly diffused on the surface thereof, the liquid crystal display device looks very dazzling when viewed from the front, or is reflected by the light from the surrounding environment such as a fluorescent lamp. It is a problem such as "so-called "bright"). An anti-glare film (anti-glare film) is usually provided on the surface of the liquid crystal display device for the purpose of preventing the above problems. As the antiglare film, a film or the like containing particles made of a synthetic resin is disclosed (for example, see Patent Document 1). The film described in the patent document 1 has an anti-glare property by setting the thickness of the binder layer to a predetermined ratio with respect to the number average particle diameter of the particles contained in the film, without reducing the transmittance. Further, as a film containing a particle, for example, it is described by a particle having a core portion and a core structure of a core portion covering the heart υβ. For example, 200844174, it is reported that a plurality of particles having a core-shell structure are used, and the shell portions of the plurality of particles are bonded to each other to form an optical film having a film shape as a whole (see, for example, Patent Document 2). In addition to the particles of the core-shell structure, for example, it is reported that particles having a refractive index change from the central portion of the particle toward the surface portion (see, for example, Patent Documents 3 and 4). [Patent Document 1] Japanese Laid-Open Patent Publication No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. In the anti-glare film described in Patent Document 1, there is room for improvement in anti-glare properties, and it is desired to develop an optical material having excellent balance between anti-glare property and white turbidity (transmissibility). A molded article (anti-glare film) ^, and a material capable of producing such an optical material molded article (anti-glare film). Further, in the optical film of Patent Document 2, although a high-density core portion is scattered in the film, there is room for improvement in anti-glare property, and in terms of balance between anti-glare property and white turbidity (transmissibility). There is also room for improvement. In addition, when the particles described in Patent Documents 3 and 4 are dispersed in an organic solvent after drying, the dispersibility (hereinafter also referred to as "re-dispersibility") is poor, and the particles are not aggregated, and the film may not be sufficiently formed. . Further, the anti-glare property is insufficient, and the balance between the anti-glare property and the white turbidity (transmissibility) is not sufficient. The present invention is provided in an aqueous solution in view of the problems of the prior art. In the organic solvent, the dispersibility of the anti-glare film of the optical material molded article which is excellent in the anti-glare property and the excellent anti-glare property, and the balance between the anti-glare property and the white turbidity (transmissibility) is excellent. A particle composition for an anti-glare film.

The inventors of the present invention conducted a thorough review in order to solve the above problems, and as a result, found that particles having an average particle diameter of 0·4 to 9 · 0 μηι formed of a polymer having a number average molecular weight of 2,000 to 15 000 were used as seed particles. And the use of a specific water-soluble polymer can solve the above problems, and finally completed the present invention. The present invention provides the following particles for an antiglare film, a method for producing the same, and a particle composition for an antiglare film. [1] A particle for an anti-glare film obtained by the following steps: in an aqueous dispersion of seed particles having an average particle diameter of 0.4 to 9·0 μm formed of a polymer having a number average molecular weight of 2,000 to 150,000 a step of adding a monomer-containing polymer component, and adding a water-soluble polymer (O' containing a polyethylene oxide structure and a ratio of 80% by mass or less to all monomer units in the aqueous dispersion a step of at least one selected from the group consisting of water-soluble polymers (ii) of a constituent unit containing a polar functional group, and a step of polymerizing the above-mentioned polymerized component. [2] The prevention according to the above [1] The particle for the glare film, wherein the content ratio of the structural unit derived from the monomer in the above-mentioned 7·200844174 is continuously or stepwise along the central portion toward the surface portion, and the average particle diameter thereof is 0.8 to ΙΟμιη. The particle for an anti-glare film according to the above [1], wherein the refractive index is continuously changed along the center portion toward the surface portion. [4] The antiglare film according to the above [1] The particle of the anti-glare film according to the above [1], wherein the @ seed particle contains a fragrance. The particle of the anti-glare film according to the above [1]. The particle for the anti-glare film according to the above [1], wherein the single sheet is the one of the group of the ethylene-based monomer and the (meth)acrylate-based monomer. The method is an aromatic vinyl monomer or a (meth) acrylate monomer. [7] A method for producing particles for an antiglare film, comprising: comprising a polymer having a number average molecular weight of 2,000 to 1 50,000 a step of adding a monomer-containing polymer component to an aqueous dispersion of seed particles having an average particle diameter of 0·4 to 9·0 μm, and Φ adding a water-soluble structure containing a polyethylene oxide structure to the aqueous dispersion The molecule (i) and at least 80% by mass of the total monomer unit are selected from the group consisting of the water-soluble polymer (ii) of the constituent unit derived from the polar functional group-containing monomer. One step [8] The method of producing the particles for an anti-glare film according to the above [7], wherein the content ratio of the structural unit derived from the monomer is along the central portion toward the surface portion. The method for producing particles for an anti-glare film according to the above [7], wherein the average particle diameter is -8-200844174 0 · 8 〜1 0 0 η ι 〇 9 , , , , , , , , , , , , , [10] The method for producing an anti-glare film according to the above [7], wherein the difference between the refractive index of the central portion and the refractive index of the surface portion is 〇.〇1 〜 0 · 1 5 〇

[1] The method for producing particles for an anti-glare film according to the above [7], wherein the seed particles contain at least one selected from the group consisting of an aromatic vinyl monomer and a (meth)acrylate monomer. The structural unit derived from the monomer. [2] The method for producing particles for an anti-glare film according to the above [7], wherein the monomer is an aromatic vinyl monomer or a (meth)acrylate monomer. [13] A particle composition for an anti-glare film, comprising: (A) the particle for an anti-glare film according to the above [1], and (B) having a refraction of a surface portion of the particle for the anti-glare film (A); The composition of the adhesive with the same degree of refractive index. [14] A method for producing a particle composition for an anti-glare film, comprising mixing the particles for an anti-glare film according to the above [1] and a binder component to obtain a particle composition for an anti-glare film. [1] A molded article of an optical material is formed from particles containing an antiglare film according to the above [1]. [16] The optical material molded article according to the above [15], which is an antiglare film, a light diffusing film, a light diffusing plate, a polarizing plate, or a light guide plate. 200844174 [1] An anti-glare film comprising: a base material layer; and an anti-glare layer formed of at least one surface of the base material layer of the particle composition for an anti-glare film according to the above [13]. The particles for an anti-glare film of the present invention have excellent dispersibility in an aqueous solution and an organic solvent, and excellent anti-glare properties are exhibited, and the balance between anti-glare property and white turbidity (transparency) is excellent. The effect of an optical material molded article. Φ The method for producing particles for an anti-glare film according to the present invention is excellent in dispersibility in an aqueous solution and an organic solvent, and can be produced to exhibit excellent anti-glare properties while preventing glare and white turbidity (transparency). The effect of the particles for the anti-glare film of the optical material molded article which is excellent in balance. Since the particle composition for an anti-glare film of the present invention contains particles for an anti-glare film having good dispersibility in an aqueous solution and an organic solvent, an optical material molded article can be favorably formed, and excellent anti-glare property can be formed. At the same time, the balance between the anti-glare property and the white turbidity (transmission property) is excellent, and the effect of the optical φ material molded article is excellent. According to the method for producing a particle composition for an anti-glare film of the present invention, it is possible to produce an optical material molded article which is excellent in anti-glare property and excellent in balance between anti-glare property and white turbidity (transmissibility). The effect of the particle composition for the glare film. Since the optical material molded article of the present invention and the antiglare film of the present invention use particles for an antiglare film having good dispersibility in an aqueous solution and an organic solvent, they can be formed favorably, and at the same time, excellent antiglare properties can be achieved. The balance between anti-glare property and white turbidity (transmission property) is very excellent. EMBODIMENT OF THE INVENTION BEST MODE FOR CARRYING OUT THE INVENTION The best mode for carrying out the invention will be described below, but the invention is not limited by the following embodiments. In other words, the following embodiments can be appropriately modified or improved based on the general knowledge of those skilled in the art without departing from the spirit and scope of the invention.

[1] Antiglare film. Particles and a method for producing the same: One embodiment of the particles for an antiglare film of the present invention is obtained by the following steps: a polymer containing a polymer having a number average molecular weight of 2,000 to 150, 000 The average particle diameter is 〇·4~9. The step of adding a monomer-containing polymer component to the aqueous dispersion of seed particles of 〇μιη (hereinafter also referred to as "polymerization component addition step"); In addition, water-soluble polymer (1) containing a polyoxyethylene structure and water-soluble constituent units containing a polar functional group-containing monomer having a ratio of 80% by mass or less to all monomer units are added. At least one step selected from the group consisting of the polymer (ii) (hereinafter also referred to as "water-soluble polymer addition step"), and a step of polymerizing the polymerization component (hereinafter also referred to as "polymerization step"). The particle for the anti-glare film of the present embodiment can be produced as described above. The particle for the anti-glare film of the present embodiment is used by the number average molecular weight of 2,0 〇〇~ The average particle diameter of the polymer of 150,000 is -11 - 200844174 is 0.4 to 9. The particles of Ομπι are used as seed particles, and the water-soluble polymer (i) or the water-soluble polymer (ii) is used. The dispersibility in an aqueous solution and an organic solvent is good, and an optical material molded article which exhibits excellent anti-glare property and excellent balance between anti-glare property and white turbidity (transparency) can be obtained. - 1] Polymerization component addition step: Φ In order to obtain the particles for an anti-glare film of the present embodiment, first, an average particle diameter of a polymer having a number average molecular weight of 2,000 to 150,000 is 〇·4 to 9.0 μm. The aqueous component containing the monomer is added to the aqueous dispersion of the seed particles. The aqueous dispersion used in the step of adding the polymerization component is not particularly limited as long as it contains the seed particles. For example, the seed particles can be dispersed. The medium containing water as a main component. In this case, the water content is, for example, preferably 40% by mass or more, more preferably 50% by mass or more. The other medium to be used may be a compound such as an ester, a ketone, a phenol or an alcohol. The above seed particles are an average particle diameter of a polymer having a number average molecular weight of 2,000 to 150,000. The particles of 0.4 to 9.0 μm are not particularly limited. By using such particles as seed particles, the content of the structural unit derived from the monomer can be continuously continuous along the central portion toward the surface portion. Or particles for controlling the anti-glare film in stages. The number average molecular weight of the polymer constituting the seed particles is 2,000 to 1 50,000, preferably 5,000 to 10,000,000, more preferably 10,000 to -12 to 200844174

1 00,000. When the number average molecular weight is less than 2,000, when the polymerization component is polymerized, the particles are deformed by collapse and formed. On the other hand, when it exceeds 1 50,000, when the seed is used as a seed particle for seed emulsion polymerization, since the monomer cannot be impregnated into the seed particle, the obtained particle for the anti-glare film is derived from the monomer. There is no change in the content rate of the structural unit. Here, the "number average molecular weight" in the present specification is determined by gel permeation chromatography (GPC) using polystyrene as a standard substance. Further, the seed particles have an average particle diameter of 0.4 to 9. Ομιη, particularly preferably 0.8 to 4.5 μm, more preferably 1.0 to 3. 5 μm. When the average particle diameter is less than 0.4 μm, the entire particles become light-scattering, and therefore, when used as an anti-glare film particle, sufficient antiglare performance cannot be obtained. On the other hand, if it exceeds 9.0 μη, there is a problem that the polymerization stability is deteriorated. Here, the "average particle diameter" in the present specification means the average 値 of the particle diameter measured by performing image analysis of the S Ε Μ photograph. Specifically, for the SEM photograph of at least 1 particle, the longest diameter of the particle is measured, and the average diameter of the measured diameter is taken as the average particle diameter. The seed particles are not particularly limited as long as they have the above-described specified number average molecular weight and a predetermined average particle diameter, and preferably contain an aromatic vinyl monomer and a (meth) acrylate monomer. A structural unit derived from at least one monomer shipped by a square. The scented aromatic alkyl monomer system means a substituted or unsubstituted aromatic vinyl monomer, and examples thereof include styrene, α-methylstyrene, vinyltoluene, p-methylethene, and 2-methylbenzene. Ethylene, 3-methylstyrene, 4_methyl 200844174 phenylethyl, 4-ethylbenzene, tetrabutyl butyl benzene, ^ dimethyl basic ethylene 4 methoxy styrene, 'B Oxystyrene, plant chlorostyrene, 3-chlorostyrene, 4-chlorostyrene, 2,4•dichlorostyrene, 2,6•dichlorostyrene, 4-chloro-3-methylstyrene ,] vinyl naphthalene, 2 _ vinyl pyridine, 4-vinyl pyridine, and the like. Among these, styrene and ?-methylstyrene are preferred. These aromatic vinyl monomers may be used alone or in combination of two or more. The ratio of the structural unit derived from the k-square aromatic vinyl monomer is preferably i 〇 〜 〇〇 〇〇 mass %, more preferably 30 〜 1 〇〇 mass %, for all structural units in the seed particles. Very good for 5〇~1〇〇% by mass. When the ratio is less than 10% by mass, the light scattering property is insufficient, so that when it is used as an antiglare film particle, sufficient antiglare performance cannot be obtained. The (meth) acrylate system alone means a substituted or unsubstituted (meth) acrylate monomer, and examples thereof include methyl (meth) acrylate, ethyl (ethyl) acrylate, and (methyl) a (meth) acrylate such as propyl propyl acrylate, n-hexyl (methyl) propyl hexanoate, 2-ethylhexyl (methyl) propionate, or cyclohexyl (methyl) propyl hexanoate ( (meth)acrylate alkoxy (cyclo)alkane; (meth) acrylate (meth) acrylate (meth) acrylate (meth) acrylate (meth) acrylate A polyvalent (meth) acrylate such as a propane tri(meth) acrylate; a vinyl ester such as vinyl acetate, vinyl propionate or versatic vinyl acetate. Among these, methyl (meth)acrylate is preferred. The ratio of the structural unit derived from the (meth) acrylate monomer is preferably from 〇 to 90% to 14 to 200844174%, more preferably from 0 to 70% by mass, based on all structural units in the seed particles. , particularly preferably 0 to 50% by mass. When the ratio is more than 90% by mass, the light scattering property is insufficient, so that when it is used as a particle for an anti-glare film, sufficient antiglare performance cannot be obtained. In addition, the seed particles may contain a structural unit derived from an aromatic vinyl monomer and a structural unit derived from a (meth) acrylate monomer, and may contain a polyfunctional monomer and other singles to be described later. The structural unit from the body unit.

The ratio of the structural unit derived from the polyfunctional monomer is preferably 〇30 to 30% by mass, more preferably 0 to 25% by mass, and particularly preferably 0 to 1 for all structural units in the seed particles. 0% by mass. If the above ratio exceeds 30 mass ° /. When seed emulsification polymerization is carried out using the particles as seed particles, since the monomer cannot be impregnated into the seed particles, the content of the structural unit derived from the monomer in the obtained particles for the anti-glare film does not change. After that. The ratio of the structural unit derived from the other monomer is preferably 0 to 40% by mass, more preferably 〇 to 2% by mass, and particularly preferably 0 to 1% by mass for all structural units in the seed particles. %. When the ratio is more than 40% by mass, the light scattering property is insufficient, so when used as a particle for an anti-glare film, the content of the seed particles in the aqueous dispersion is insufficient for obtaining sufficient antiglare performance. The total amount of the aqueous dispersion is preferably from 1 to 30% by mass, more preferably from 2 to 20% by mass, particularly preferably from 5 to 15% by mass. When the content is less than 1% by mass, the collision frequency between the seed particles and the monomer is lowered, and the monomer is not sufficiently absorbed by the seed particles. On the other hand 'if more than 3 〇 mass ° /. 'There is a difference in the stability of polymerization. -15- 200844174 The monomer ‘ contained in the polymerization component used in the polymerization component addition step is not particularly limited, and for example, an aromatic vinyl monomer or a (meth) acrylate monomer is preferable. Since the monomer having a high copolymerization property in the above single system is used, it has an advantage of obtaining a polymer having good polymerization stability and high polymerization conversion.

The 曰 矢 细 细 细 体系 体系 体系 system can be used in the same manner as the aromatic styling monomer used to constitute the structural unit derived from the aromatic vinyl monomer contained in the above seed particles. The ratio of the monomer of the sulphur-burning group is preferably from 0 to 90% by mass, more preferably from 30 to 85% by mass, particularly preferably from 40 to 80% by mass, based on all the monomers in the polymerization component. . When the ratio is more than 90% by mass, the difference between the refractive index of the central portion of the particles and the refractive index of the surface portion is small, so that when used as an antiglare film particle, sufficient antiglare performance cannot be obtained. The (meth) acrylate system can be used in the same manner as the (meth) acrylate monomer used to constitute the structural unit of the (meth) acrylate monomer contained in the seed particles. The ratio of the (meth) acrylate monomer is preferably from 5 to 95% by mass, more preferably from 15 to 70% by mass, even more preferably from 20 to 50% by mass, based on all the monomers in the polymerization component. When the ratio is less than 5% by mass, the difference between the refractive index of the central portion of the particles and the refractive index of the surface portion is small, so that when used as an antiglare film particle, sufficient antiglare performance cannot be obtained. Moreover, as the monomer, a polyfunctional monomer may be mentioned in addition to the aromatic vinyl monomer and the (meth) acrylate monomer. The polyfunctional mono-16-.200844174 is represented by, for example, a non-conjugated vinyl compound represented by divinylbenzene or trimethylolpropane trimethacrylate (τ μ Ρ Μ A ). A polyvalent acrylate compound or the like having at least two or more copolymerizable double bonds is considered as a suitable example.

Examples of the polyvalent acrylate compound include polyethylene glycol diacrylate, 1,3-butylene glycol diacrylate, ι, 6-hexanediol diacrylate, and polypropylene glycol diacrylate. Triacrylate such as acrylate compound, trimethylolpropane triacrylate or tetramethylol methane triacrylate, ethylene glycol dimethacrylate, diethylene glycol dimethacrylate, triethylene glycol Alcohol dimethacrylate, polyethylene glycol dimethacrylate, I3 - butanediol dimethacrylate, 1,4 · butanediol dimethacrylate, 1,6-hexanediol Trimethacrylate such as methacrylate or neopentyl glycol dimethacrylate, trimethylolpropane trimethacrylate, trimethylolethane trimethacrylate or the like Esters and the like. Among these, divinylbenzene, ethylene glycol dimethacrylate, trimethylolpropane trimethacrylate, etc. are mentioned as a suitable example. Further, in the above, from the viewpoint of polymerization stability, from the viewpoint of improving the polymerization stability, divinylbenzene or trimethylolpropane trimethacrylate is preferred. Further, these monomers may be used alone or in combination of two or more. The proportion of the polyfunctional monomer is preferably from 5 to 50% by mass, more preferably from 1 to 45% by mass, even more preferably from 20 to 35 % by mass, based on all the monomers in the polymerization component. When the ratio is less than 5% by mass, the solvent resistance is insufficient because a sufficient molecular weight is not obtained. On the other hand, if it exceeds 5 0 -17 -

200844174% by mass is the result of deterioration in polymerization stability. Further, as the above-mentioned aromatic vinyl monomer, other monomers may be used in addition to the methyl ester monomer and the polyfunctional monomer. Examples of the monomer include N-methylol (meth) propylene oxime. N-methylolated unsaturated amines such as amine hydroxymethyl (meth) acrylamide; amine-containing alkyl groups such as 2-dimethylaminoethyl acrylamide; (meth) acrylonitrile An amine, N-methoxymethyl (methyl), N, N-extended ethyl bis(methyl) acrylamide, 'anhydrous acid, such as amide amine, which is an unsaturated acid such as guanamine. Amines; N-monoalkyl groups such as N-methylamine, N,N-dimethyl decylamine (methylamine, N,N-dialkyl acrylamide; 2-dimethylaminoethyl) (Aminoalkyl group-containing (meth) acrylates such as olefinic acid esters; (meth) acrylates containing 2,5 ethoxy)ethyl (meth) acrylates; Halogenated vinyl compounds such as ethylene, vinylidene chloride, and enester; 1,3-butadiene, metadiene, 2-chloro-1,3-butadiene, 2,3-dimethyl-1 , 3-butadiene compound, etc. Further, these monomers may be a single one The ratio of the other monomer is preferably 0 to 20% by mass, more preferably 1 to 15% by mass, based on the total amount of the polymerization component. The specific component is added to the above aqueous dispersion. The above-mentioned aqueous dispersion may be added to the above-mentioned aqueous dispersion, or the above-mentioned polymerization component may be added at once. Thus, if acrylic acid is used as the other, ruthenium, osmium and carboxylic acid oxime acrylamide ruthenium amide, maleate Conjugation of a propylene oxime) propylene fluorenylmethyl) propyl (dimethyl dimethyl oxyalkyl fatty acid ethyl 1,3- butyl or the like, or a combination of preferably 3 to 5: a part is not: polymerization Ingredients•Sex dispersion -18- 200844174 Adding a polymerization component', for example, a monomer in a polymerization component is absorbed by seed particles, and the absorbed monomer can be smashed along the center of the seed particle toward the surface to reduce its content. In the case of the particles for the anti-glare film of the present embodiment, the particles of the anti-glare film of the present embodiment can be placed in the surface portion along the center portion of the seed particles at a single time (the addition). Content rate Therefore, when the polymerization component is supplied in one step, the synthesis operation of the particles for the anti-glare film becomes easy. [1-2] Water-soluble polymer addition step: In order to obtain the prevention of the present embodiment The particles for the glare film are added to the aqueous dispersion (i.e., the polymer component is added to the aqueous dispersion), and the water-soluble polymer (i) containing the polyethylene oxide structure is added, and the monomer unit is added. 80 mass%. / The following ratio is at least one selected from the group consisting of water-soluble polymers (ii) of constituent units derived from polar functional group-containing monomers. And at least one selected from the group consisting of the water-soluble polymer (ii), the monomer in the polymerization component is polymerized to obtain particles for an anti-glare film, and water is prevented during polymerization of the polymerization component. When the seed particles in the dispersion are agglomerated with each other, and the particles for the anti-glare film obtained are dispersed in the organic solvent, the particles of the anti-glare film can be prevented from coagulating with each other. . In other words, by using at least one of the water-soluble polymer (i) or the water-soluble polymer (ii), the aggregation of the seed particles can be prevented during the polymerization of the polymerization component, and the present embodiment is formed in the form of -19-200844174 When the particles for the anti-glare film are dispersed in an organic solvent, the particles for the anti-glare film can be mutually agglomerated. The water-soluble polymer (i) is, for example, a vinyl group-containing polymer containing polyethylene oxide as a main component, and a commercially available product such as "Adeka ReasoapER-30" (manufactured by Adeka Co., Ltd.).

When the water-soluble polymer (i) is added, the amount of addition is not particularly limited, and is preferably 2 to 30 parts by mass, more preferably 5 to 25 parts by mass, per 1 part by mass of the polymerized component. Good for 10 to 20 parts by mass. When the amount of the water-soluble polymer (i) added is less than 2 parts by mass, the polymerization stability may be deteriorated. On the other hand, when it exceeds 30 parts by mass, the polymerization system will be thickened, and the polymerization stability will be deteriorated. The water-soluble polymer (Π) is a constituent unit containing a polar functional group-containing monomer in a ratio of 80% by mass or less based on all monomer units. A monomer having a polar functional group has a monomer having a polar functional group in its molecule. Examples of the polar functional group include a carboxyl group, a cyano group, a hydroxyl group, a glycidyl group, and an ester group. Among these, a carboxyl group or a hydroxyl group is preferable as a polar functional group-containing monomer whose polar functional group is a carboxyl group, and examples thereof include (meth)acrylic acid, crotonic acid, cinnamic acid, maleic acid, and maleic anhydride. , fumaric acid, itaconic acid, itaconic anhydride, monomethyl maleate, monoethyl maleate, monomethyl meconate, monoethyl meconate, mono-2-phthalic acid A carboxyl group-containing unsaturated monomer such as (meth)acryloxyethyl ester or the like, and an anhydride thereof. Among these, (meth)acrylic acid is preferred. Examples of the polar functional group-containing monomer having a polar functional group of a cyano group, for example, -20-200844174, a vinyl cyanide monomer such as (meth)acrylonitrile, crotononitrile or cinnamic acid nitrile; ) 2-cyanoethyl acrylate, 2-cyanopropyl (meth)acrylate, 3-cyanopropyl (meth)acrylate, and the like. Among these, (meth)acrylonitrile is preferred.

Examples of the polar functional group-containing monomer having a polar functional group of a hydroxyl group include hydroxymethyl (meth)acrylate, 2-hydroxyethyl (meth)acrylate, and 6-hydroxyhexyl (meth)acrylate. a mono(meth)acrylic acid hydroxy(cyclo)alkyl ester such as 4-hydroxycycloS(meth)acrylate or neopentyl glycol mono(meth)acrylate; 3-chloro-2-(meth)acrylate A mono(meth)acrylic acid substituted hydroxy(cyclo)alkyl ester such as hydroxypropyl ester or 3-amino-2-hydroxypropyl (meth)acrylate. Among these, hydroxymethyl (meth)acrylate is preferred. Examples of the polar functional group-containing monomer having a polar functional group of a glycidyl group include propyl propyl glycidyl ether, (meth) propyl acetoacetate, and glycidyl methyl acrylate. Methyl) epoxidized cyclohexyl acrylate or the like. Among these, glycidyl (meth)acrylate is preferred. Examples of the polar group-containing group having a polar functional group of an ester group include methyl (meth)acrylate, ethyl (meth)acrylate, propyl (meth)acrylate, and (methyl). (meth) acrylate (cyclo)alkane such as n-hexyl acrylate, 2-ethylhexyl (meth) acrylate, cyclohexyl (meth) acrylate; 2-methoxyethyl (meth) acrylate , (meth) acrylate (meth) acrylate (meth) acrylate alkoxy (cyclo) alkane, trimethylolpropane tri (meth) acrylate, etc. ( -21 - 200844174 gram of water with a good quality of 60 doses: body. Solvented methyl) acrylates; vinyl acetate, vinyl propionate, versatic vinyl acetate Classes, etc. Among them, Methyl (meth)acrylate is preferred. Further, the above monomers may be used alone or in combination of two or more.

In the water-soluble polymer (ii), the proportion of the monomer having a polar functional group is 80% by mass or less, more preferably 20 to 80% by mass, still more preferably 30 to 70% by mass for all monomer units. %, especially good 40~ mass%. When the above ratio exceeds 80% by mass, the redispersibility of the particles to the organic solvent is deteriorated. When the water-soluble polymer (ii) is added, the amount of addition is not particularly limited. It is preferably 2 to 30 parts by mass, more preferably 5 to 25 parts by mass, and particularly preferably 1 for 100 parts by mass of the polymerized component. 〇 ~ 20 parts by mass. When the amount of the glutenium molecule (i i ) added is less than 2 parts by mass, the polymerization property is deteriorated. On the other hand, when it exceeds 30 parts by mass, the polymerization will increase in viscosity and the stability of polymerization will be deteriorated. Further, after adding at least one selected from the group consisting of the water-soluble polymer (i) and the water-soluble high component (Π), the aqueous dispersion is stirred at a temperature of 0 to 90 ° C. Further, the dispersibility in the aqueous liquid and the organic solvent can be further improved, and the particles having an anti-glare film can be more preferably changed (increased or decreased) in refractive index toward the surface portion. [1-3] Polymerization step: -22- 200844174

In order to obtain the particles for the anti-glare film of the present embodiment, the polymerization component added to the aqueous dispersion in the addition step of the polymerization component is polymerized. Namely, the monomer added to the polymerization component of the aqueous dispersion is polymerized in the presence of at least one selected from the group consisting of the water-soluble polymer (i) and the water-soluble polymer (ii). The polymerization conditions of the polymerization component are not particularly limited, and for example, the polymerization temperature is 40 to 100 ° C (preferably 50 to 1 ° C, more preferably 60 to 90 ° C), and the polymerization time is 0.11. It is carried out under conditions of 30 hours (preferably 2 to 2 5 hours). In the polymerization of the polymerization component, a polymerization initiator, a molecular weight modifier, a chelating agent, an inorganic electrolyte or the like may be used as needed. These may be used alone or in combination of two or more. As the polymerization initiator, for example, a persulfate such as potassium persulfate or ammonium persulfate; benzhydryl peroxide, lauryl peroxide, and t-butyl peroxy-2-ethylhexanoate can be used. Or an organic peroxide; an azo compound such as azobisisobutyronitrile, dimethyl-2,2'-bisazabutyrate or 2-aminoformyl azaisobutyronitrile; A redox system in which a radical emulsifier of an oxidizing group, a radical emulsifier, a sodium hydrogen sulfite, and a reducing agent such as ferrous sulfate are combined. Examples of the molecular weight modifier include n-hexyl mercaptan, n-octyl mercaptan, n-dodecyl mercaptan, tridecyl mercaptan, n-hexadecyl mercaptan, n-tetradecyl mercaptan, and tris. a thiol such as a tetradecyl thiol or a acetoxyacetate; a xanthogen such as dimethylxanthogen disulfide, diethyl xanthogen disulfide or diisopropylxanthate disulfide Dithizones; tetramethylthiuram disulfide, tetraethylthiuram disulfide, tetrabutyl thiuram disulfide-23-200844174, etc. thiuram disulfide; chloroform, Halogenated hydrocarbons such as carbon tetrachloride, carbon tetrabromide and ethylene bromide; hydrocarbons such as pentaphenylethane and methylstyrene dimer; acrolein, methacrolein, allyl alcohol, 2 -ethylhexyl thioglycol, onion oleyl, α-terpinene, γ-terpinene, dipentene, 1,1-diphenylethylene, and the like.

Further, these molecular weight modifiers may be used alone or in combination of two or more. Among these, it is more preferable to use a mercaptan, a xanthogen disulfide, a thiuram disulfide, a 1,1-diphenylethylene or a methylstyrene dimer. The polymerization conversion ratio at the end of the polymerization is preferably 80% by mass or more, more preferably 90% by mass or more, and particularly preferably 95% by mass or more. When the polymerization conversion ratio is less than 80% by mass, the particles are fused to each other in the powdering step to be described later. Further, after the emulsion containing the particles for the anti-glare film is obtained through the polymerization step, the solvent for removing the anti-glare film in a dry state can be obtained by removing the solvent from the obtained emulsion (powdering step). The method for removing the solvent from the emulsion is not particularly limited, but from the viewpoint of being easily dried, a freeze-drying method or a spray drying method is preferred. In addition, the removal of the solvent is preferably carried out so that the ratio of the solvent is 5.0% by mass or less, and more preferably 3.0% by mass or less. When the ratio of the solvent is more than 5.0% by mass, the re-dispersibility of the organic solvent is deteriorated, and aggregates are formed in the above-mentioned composition, so that the quality is unstable. In the particles for an anti-glare film of the present embodiment, the content ratio of the structural unit of -24-200844174 from the monomer is continuously or stepwise along the central portion toward the surface portion, and the average particle diameter thereof (The average particle diameter of the particles for the anti-glare film) is preferably 0.8 to ΙΟμηη.

Since the content ratio of the structural unit from the monomer changes continuously or stepwise along the central portion toward the surface portion, since the light incident on the particles for the anti-glare film is not totally reflected by the surface of the particle, it is obtained. An optical material molded article having excellent anti-glare properties and excellent balance between anti-glare property and white turbidity (transmissibility). The "content ratio of the structural unit derived from the monomer" can be confirmed by the coloring of the dyed portion by dyeing the structural unit contained in the particles for the antiglare film from the monomer. For example, when a particle for an antiglare film is obtained by using a polymerization component containing an aromatic vinyl monomer as a monomer, the cross section at the center of the particle for the antiglare film obtained is cut, and the dye is dyed with ruthenium. In the structural unit derived from the aromatic vinyl monomer in the cross section, the color of the dyed portion is observed after dyeing, and the concentrated dyed portion can be judged to have a high content ratio of the structural unit derived from the aromatic vinyl monomer. The dyed portion can be judged to have a low content rate of the structural unit derived from the aromatic vinyl monomer. In the "central portion" of the particles for the anti-glare film in the present specification, the content of the structural unit from the monomer is continuously changed, which means the center of the particle for the anti-glare film; and the particle for the anti-glare film has a plurality of layers. In the structure, when the content ratio of the structural unit derived from the monomer in the adjacent layer is changed stepwise, it means the layer closest to the center of the particle for the anti-glare film. In the "surface portion" of the particles for an anti-glare film in the present specification, when the content ratio of the structural unit from the mono-25-200844174 body is continuously changed, it means the surface of the particle for the anti-glare film; and the anti-glare film When the particle has a multilayer structure and the content ratio of the structural unit derived from the monomer in the adjacent layer is changed stepwise, it means a layer located on the most surface side of the particle for the anti-glare film. The particles for the anti-glare film of the present embodiment have an average particle diameter of 0.8 to ΙΟμπι, preferably 1 to 8 μm, more preferably 2 to 5 μm. When the average particle diameter is less than 0.8 μm, a sufficient light diffusion effect cannot be obtained. On the other side, if it exceeds 1 〇μηι, the light scattering is too strong and the transparency of the film is lost. The particle for an anti-glare film of the present embodiment preferably has a refractive index that continuously changes along the central portion toward the surface portion. By continuously changing the refractive index along the central portion toward the surface portion, the light incident on the particles for the anti-glare film is not totally reflected by the surface of the particles, so that excellent anti-glare property can be obtained, and anti-glare and white turbidity can be obtained. An optical material molded article excellent in balance of sensation (transmission). In the present specification, the "refractive index" is used for the antiglare film, for example, when an aromatic vinyl monomer is used as a monomer and a polymerization component containing an acrylate monomer is used to obtain particles for an antiglare film. The refractive index of the particles can be determined as follows. First, a polymer obtained by separately polymerizing (synthesizing) an aromatic vinyl monomer (hereinafter also referred to as "(a 1 ) polymer)), and a polymer obtained by polymerizing an acrylate monomer alone (hereinafter also It is described as "(a2) polymer"). Then, the (a 1 ) polymer and the ( a2 ) polymer are respectively coated on a substrate, and dried at 70 ° for 1 minute to prepare a (ai) polymer (a2 ) having a thickness of 1 Ομηι, respectively. Polymer -26- 200844174 into a dry (al) film and (a2) film. The refractive index X and Y of each of the produced (al) film and (a2) film were measured by an Abbe refractometer. Then, using the measured refractive index X, Y, and the mixing ratio X and y of the aromatic vinyl monomer and the acrylate monomer in the polymerization component used in the production of the particles for the actual antiglare film, according to the following formula Calculation formula: {Xx(x/100) } + { Yx ( y/ 100) }

Further, the refractive index of the particles for the anti-glare film of the present embodiment may be continuously decreased toward the surface portion along the central portion, and the refractive index may be continuously increased toward the surface portion along the central portion. The difference between the refractive index of the central portion of the particle for an anti-glare film of the present embodiment and the refractive index of the surface portion is preferably 0.01 to 0.15, more preferably 0.02 to 0", and particularly preferably 0.03 to 0.07. If the difference in refractive index is less than 0.01, sufficient light scattering performance may not be obtained. On the other hand, if it exceeds 〇1.5, the light scattering is too strong, and the transparency of the film is lost. [2] Particle composition for an anti-glare film: One embodiment of the particle composition for an anti-glare film of the present invention includes: particles for an anti-glare film ((A) particles for an anti-glare film (hereinafter also referred to as "(A) The particle ")) and a binder component having a refractive index similar to the refractive index of the surface portion of the particle for the anti-glare film (A) (hereinafter also referred to as "(B) component". In the particle composition for a glare film, the optical material molded article can be favorably formed by containing the particles for the antiglare film having good dispersibility in a solution of water -27-200844174 and an organic solvent. The molded article has an advantage of exhibiting excellent anti-glare properties and excellent balance between anti-glare property and white turbidity (transmissibility). Details thereof will be described below.

The component (B) contained in the particle composition for an anti-glare film of the present embodiment is not particularly limited as long as it has a refractive index similar to the refractive index of the surface portion of the (A) particle, and is not particularly limited. Examples thereof include thermoplastic resins such as polyvinyl acetate, polyvinyl alcohol, polyvinyl chloride, polyvinyl butyral, poly(meth)acrylate, and nitrocellulose; phenol resin, melamine resin, polyester resin, and poly A thermosetting resin such as a urethane resin or an epoxy resin. These (B) components may be used singly or in combination of two or more. Here, the "refractive index of the same degree as the refractive index of the surface portion" is, for example, a structure having particles of an anti-glare film having a plurality of layers, and the refractive index of the surface layer of the particles for the anti-glare film is regarded as "1". 00", when the refractive index decreases toward the surface portion along the central portion, it means a refractive index in the range of 95 to 100, and when the refractive index increases toward the surface portion along the center portion, it means a range of 100 to 105. Refractive index. The total light transmittance of the component (B) is preferably 80% or more, more preferably 90% or more. When the total light transmittance is 80% or more, there is an advantage that an optical material molded article having more excellent light transmittance can be produced. Furthermore, the "total light transmittance" in this specification is measured in accordance with JI S K7 1 〇 5. The ratio of the (Β) component is preferably from 1 to 10, 〇〇〇 by mass, more preferably from 2 to 5,000 parts by mass, based on 1 part by mass of the (A) particles, -28-200844174 It is 3 to 1,000 parts by mass. When the ratio of the component (B) is less than 1 part by mass, it is difficult to disperse and integrate the (A) particles on the surface of a resin-made sheet or the like, for example. On the other hand, when the ratio of the component (B) exceeds 100,000 parts by mass, the amount of particles in the obtained optical material molded article (especially, the film) is too small, and the light scattering function cannot be exhibited.

In the particle composition for an anti-glare film of the present embodiment, in addition to the (A) particles and the component (B), other components such as a curing agent, a dispersing agent, and a dye may be contained as necessary. The ratio of the other components is preferably 0 to 10 parts by mass, more preferably 〇 to 5 parts by mass, and more preferably 〇 to 3 parts by mass of the (A) particles and the component (B) in a total amount of 1 part by mass. Parts by mass. If the above ratio exceeds 1 〇 by mass, the total light transmittance is reduced. [3] Method for producing particle composition for anti-glare film: According to one embodiment of the method for producing a particle composition for an anti-glare film of the present invention, the particles for anti-glare film of the present invention and a binder component are mixed to obtain an anti-glare film. A particle composition for a glare film. The binder component preferably has a refractive index similar to the refractive index of the surface portion of the particles for an anti-glare film of the present invention, and the same as the above-described binder component can be suitably used. The method for producing the particle composition for an anti-glare film of the present embodiment, specifically, the particles for removing the anti-glare film obtained by removing the solvent from the emulsion obtained in the same manner as in the above [1-3] polymerization step. A method of mixing the obtained particles for an antiglare film and the component (B) (adhesive component). -29- 200844174 Further, when the particles for the anti-glare film and the component (B) are mixed, the other components may be mixed at the same time, or the particles for the anti-glare film and the component (B) may be added. The mixing method is not particularly limited, and for example, various kneaders, bead mills, high-pressure homogenizers, and the like can be used. [4] Optical material molded article: One embodiment of the optical material molded article of the present invention is a resin material containing a resin P component and particles for the antiglare film. It can be favorably formed by containing the above-mentioned particles for anti-glare film having good dispersibility in an aqueous solution and an organic solvent. In addition, the particles for the anti-glare film are excellent in anti-glare properties, and the balance between anti-glare property and white turbidity (transmissibility) is extremely excellent. Therefore, the optical material molded article of the present embodiment can be suitably used, for example, as an antiglare film (antiglare film), a light diffusing film, a light diffusing plate, a polarizing plate, a light guide plate, or the like. Among these, it is especially suitable for anti-glare films. # The resin component is not particularly limited, and is preferably a transparent one having high transmittance to visible light. Furthermore, in the present specification, in addition to being transparent and transparent, the transparency also includes colored transparent and translucent. The resin component 'in the case where the light-transmitting property of the obtained optical material molded article is more excellent, 'in the case of forming a sheet having a thickness of 2 μm from the resin component', the light transmittance of the sheet at a wavelength of 550 nm is preferable. More than 80%' is more preferably more than 85%, and particularly preferably more than 90%. Further, from the viewpoint of having a heat resistance which is practically applicable, the glass transition temperature of the resin component is preferably 100 ° C or higher, more preferably 1 20 ° C or higher, and particularly preferably 150 ° °. C is on •30- 200844174.

Examples of the resin component include poly(ethylene terephthalate), methyl (meth)acrylate, polycarbonate, cycloolefin polymer, polyaryl vinegar, polyether maple, polystyrene, and (a). a thermoplastic resin such as a methyl acrylate-styrene copolymer or a styrene-acrylonitrile copolymer; an epoxy resin, an S. cerevisiae, and two or more (meth) propyl alcohol bases ( A heat- or active energy ray-curable curable resin such as a methacrylate, an oxetane resin or a vinyl ester resin. Among these, from the viewpoint of easy compounding with glass fiber or glass fiber cloth, and heat stability, it is preferably a hardening resin which is hardened by heat or active energy rays, more preferably epoxy resin, The ratio of the (meth) propyl sulfonate resin component of the two or more (meth) acrylonitrile groups is preferably from 1 to 99% by mass, more preferably from 10 to 8% by mass, based on 100% by mass of the resin material. 95% by mass, particularly preferably 30 to 90% by mass. When the ratio of the resin component is less than 9% by mass, the particles for the antiglare film cannot be immobilized in the optical material molded article (especially a film). On the other hand, when it exceeds 99% by mass, the light-scattering ability of the particles for the anti-glare film may not be exhibited. In the method for producing an optical material molded article of the present embodiment, the resin component and the antiglare film particles are mixed, and the mixture is supplied to an extruder, and the extrudate is subjected to a master batch. A method in which a material is supplied to an extruder and injected in a cavity to form a process. [5] Anti-glare film: -31 - 200844174 The embodiment of the anti-glare film of the present invention comprises: a base material layer; and an anti-glare layer, wherein at least the particle layer composition for the anti-glare film is formed on the base material layer Made on one side.

The antiglare layer is formed of the particle composition for an antiglare film, and has excellent antiglare properties, and is excellent in the balance between antiglare property and white turbidity (transmissibility). Further, since the particles for the anti-glare film contained in the particle composition for an anti-glare film have good dispersibility, they can be favorably formed into an anti-glare layer. [5-1] Base material layer: The base material layer is preferably a layer made of a transparent (colorless transparent, colored transparent or translucent) resin. As the above-mentioned resin, for example, the same resin component as that contained in the above resin material can be suitably used. The thickness of the substrate layer is not particularly limited, but is preferably 0.03 to 0.3 mm, more preferably 0.05 to 0. 2 mm. 5 [5-2] antiglare layer: the antiglare layer is at least at least the substrate layer The thickness of the layer formed of the particle composition for an anti-glare film formed on one surface is not particularly limited, but is preferably 0.005 to 0.1 mm, more preferably 0.008 to 0.08 mm. If the thickness of the antiglare layer is less than 0.005 mm, sufficient antiglare property may not be obtained. On the other hand, if it exceeds 0.1 mm, the total light transmittance will decrease. Further, the anti-glare layer may be formed on one side of the substrate layer or on both sides, and may be provided on the surface of a television or the like - 32-

At 200844174, the side formed on the user side is sufficient. The antiglare film of the present embodiment can be formed into a slurry by dissolving the above-mentioned particle composition for a film in an organic solvent, and a known coater can obtain a desired thickness to coat the body. The cloth is applied to one surface of the substrate layer, and then the coating layer is dried to obtain 5 as the above organic solvent, and examples thereof include water, toluene, cyclohexanone, methyl isobutyl ketone (MIBK), and methyl ethyl group. Ketone (N-methyl-2-pyrrolidone (NMP), etc. Further, these may be used in combination of two or more kinds. The ratio of the organic solvent is 1 part by mass (solid content glare film) The particle composition is preferably 10 to 2,000 by mass, preferably 20 to 1 500 parts by mass. [Examples] Hereinafter, the present invention will be specifically described based on examples, but not by the examples. In addition, in the examples, the comparative examples, and the "%", unless otherwise specified, the quality is further, and the measurement methods of various physical properties and the evaluation of the characteristics (average particle diameter) are shown below: The particle size is scanned by a Japanese company. (product name "JSM-6030LA"), the particles of the anti-glare film are observed at a magnification of 5,000 or 10,000, and the anti-glare film is arbitrarily protected by any of the above-mentioned sulphur σ ° hexane, ΜΕΚ) In the case of the present invention, the basis of the present invention is as follows. The valence method is used to analyze the particle size of the particle, and the average diameter of the particle diameter is regarded as an average. [Non-polar solvent redispersibility]: A particle composition (solid content) of 0.25 g of an anti-glare film was weighed, 25 g of toluene was added thereto, and dispersion was carried out for 40 minutes by an ultrasonic disperser (manufactured by SND). Then, the residue ratio (% by the amount of the residue remaining on the screen and the particle composition (solid content) of the anti-glare film is calculated by a sieve of about 20 μm (manufactured by Taiyo Metals Co., Ltd.). As the evaluation of the redispersibility of the non-polar solvent, the larger the residue ratio (%), the more the particles of the anti-glare film in the solution are agglomerated. [Haze (%)] · The anti-glare film is coated with the particle composition. Cloth in On the material layer, a film-form optical material molded article (hereinafter also referred to as "film") having a thickness of 1 μm was produced by drying, and a haze meter manufactured by SUGA Test Machine Co., Ltd. was used for the film, and the mist was measured in accordance with JIS Κ 7105. degree(%). [Total Light Transmittance (%)]: A film-form optical material molded article was produced in the same manner as in the measurement of the haze (%). This film was measured using a haze meter manufactured by Sigma G. Co., Ltd. in accordance with JIS K7105 in a state in which no sample was installed (air) as a reference (100%). -34 - 200844174 (Example 1) [Synthesis of particles for anti-glare film]:

First, monodisperse particles (seed particles) are produced by emulsion polymerization. Specifically, by using 5 parts of potassium persulfate as a water-soluble initiator, 95 parts of styrene, 3 parts of methacrylic acid, and 2 parts of a chain transfer agent are used as an aromatic vinyl monomer at 80°. The reaction temperature of C was subjected to emulsion polymerization at a reaction time of 6 hours to prepare seed particles having an average particle diameter of 1.0 μm formed of a polymer having a number average molecular weight of 50,000. Next, 2 parts of 3,5,5-trimethylhexyl peroxide (trade name "Peroyl 3 5 5", manufactured by Nippon Oil Co., Ltd., water solubility: 0.01%), 0.1 part of sodium lauryl sulfate After emulsification was carried out by stirring with 20 parts of water, the particles were further micronized by a sonic homogenizer (manufactured by MIZUHO Co., Ltd.) to obtain an aqueous dispersion. To the obtained aqueous dispersion, 4 parts of the above monodisperse particles were added and stirred for 16 hours. After stirring, 45 parts of styrene (ST) as an aromatic vinyl monomer, 10 parts of divinylbenzene (DVB), and 45 parts of methyl methacrylate (MMA) were added (the above is also described as The "polymerization component" was stirred at 40 ° C for 3 hours to allow the polymerization components to be absorbed by the seed particles. Then, 5 parts of (styrene) 1 - (α · methylstyrene) m - (acrylic acid) η copolymer (however, l + m + n = l, η < 0·5) was added (trade name "Joncryl" 603 0", manufactured by JOHNSON Polymer Co., Ltd., hereinafter referred to as "J6030", which is also referred to as "J6030" in Tables 1 and 2, and heated to .75 °C for 3 hours of polymerization to obtain a surface containing j 6 〇3 〇 Protected, an emulsion of particles for anti-glare film which is internally impregnated with a polymer having a refractive index from the center (center portion) toward -35 - 200844174 surface (surface portion). Further, the particles for the anti-glare film are dispersed and stabilized in the emulsion. Further, the average particle diameter of the particles for the anti-glare film was 2 · 5 μm, and the coagulum hardly occurred. The obtained particles were cut with a microtome, and the structural unit derived from styrene present in the cross section was dyed with ruthenium. After the dyeing, it was observed by a transmission electron microscope (manufactured by Hitachi, Ltd.) (photographing magnification: 5,000 times), and it was confirmed that the center (center portion) of the particle was stained toward the surface (surface portion). The color slowly fades. Therefore, it was confirmed that the content of the structural unit derived from styrene continuously decreased from the center (center portion) of the particle toward the surface (surface portion). (Examples 2 to 10, Comparative Examples 1 to 6) In the same manner as in Example 1, except that the blending prescriptions shown in Tables 1 and 2 were obtained, emulsions each containing particles for an antiglare film were obtained. The evaluation results of the average particle diameter and the redispersibility of the nonpolar solvent are shown in Tables 1 and 2. Further, Comparative Examples 1 to 4 were synthesized without using seed particles. In the table, "PIP-PSTS" indicates not (isoprene) m-(phenylethyl;); sodium sulfonate) η copolymer (however, m + n = l, η < 0·7), "ER-30" means Adeka

Reasoap ER-3 (made by ADEKA), "E1118S" means

Emulgen 1118S-70 (made by Kao Corporation). In Table 2, "PVA" means polyvinyl alcohol (KURARAY Co., Ltd.), and "PSA" means sodium polyacrylate (manufactured by Nippon Shokubai Co., Ltd.). -36- 200844174 [一嗽] Example 10 ν〇o (N E1118S tn ο inch < Ν Os d Example 9 «ο o E1118S ο CN (Ν Example 8 inch VO o (N ER-30 ο inch ( Oo oo r4 Example 7 inch o F-^ ER-30 ο inch (N (N (N Example 6 inch VO o (N PIP-PSTS vn ο inch (N CN K Example 5 inch JTi o PIP-PSTS to ο 寸 (N Example 4 〇〇 <N ... 2 (N J6030 ιη 04 〇 \ o Example 3 〇〇CN o J6030 vn v〇<N in Example 2 inch κη v〇o cn <N J6030 Vn ο Ό (Ν oo <6 Example 1 inch o J6030 wo ο (Ν (N blending prescription (parts) seed particles H cn DVB , MMA species 1 seed particles ι anti-glare film particle residue ratio (%) 岖Rf 浚Φ number average particle size (μιτ〇

-37- 200844174 [(N漱] Comparative Example 6 inch o (N PSA Ό p (Ν 20.2 Comparative Example 5 o PVA \η ρ < Ν 31.5 Comparative Example 4 1 v〇o (N J6030 1 (Ν ν〇〇 Comparative Example 3 I JO o J6030 1 〇〇CS Comparative Example 2 1 to ν〇o (N J6030 «η 1 νο r4 V£> (N Comparative Example 1 » o J6030 1 Pair (Ν cn Blend Prescription (Parts) Seed particles H 00 DVB MMA Kind of kiss seed particle anti-glare film particle residue ratio (%) Water-soluble polymer number average particle size (μηι)

*38- 200844174 (Example 11) [Preparation of particle composition for anti-glare film and production of optical material molded article] First, a spray dryer (model "B-2 90", manufactured by BUCHI, Japan) The emulsion containing the particles for anti-glare film obtained in Example 1 was dried to obtain powdery particles (A). Then, a mixture of 100 parts of dipentaerythritol pentaacrylate and dipentaerythritol hexaacrylate was mixed (indicated by "DPHA" in Table 3 (trade name "Aronix M402", manufactured by Toagosei Co., Ltd.), and 1 part by weight) An organic solvent (toluene/cyclohexanone = 9/1, and "solvent" in Table 3) was used to obtain a mixed solution. To the obtained mixed liquid, 1 part by weight of the above-mentioned powdery particles (A) and dispersion was added to prepare a particle composition for an antiglare film. Next, the particle composition for an anti-glare film obtained by a Meyer rod was applied onto a substrate (base material layer) made of polyethylene terephthalate (pET) having a thickness of 0.2 mm. At this time, the coating amount of the particle composition for an anti-glare film was adjusted so that the thickness of the coating layer (anti-glare layer) after drying was 0 μm (0.01 mm). After drying, the ultraviolet rays of 500 mJ/cm2 were irradiated with a high-pressure mercury lamp to be hardened to prepare an optical material molded article (anti-glare film). The manufactured optical material molded article (anti-glare film) was evaluated for haze (%) and total light transmittance (%). The evaluation results showed that the haze was 27.7% and the total light transmittance was 92 9%, which was a good balance. It is confirmed that the balance between the anti-glare property and the white turbidity (transmission property) is excellent. Further, the substrate made of PET described above had a haze of 28% and a total light transmittance of 94.2%. -39-200844174 (Example 1 2 to 2 0, Comparative Example 7 to 1 2) A particle composition for an anti-glare film was prepared in the same manner as in Example 1 except that the formulation was as shown in Table 3. Then, an optical material molded article (anti-glare film) was produced in the same manner as in Example 1 1 using the particle composition for an anti-glare film, and the haze (%) and the total light transmittance (%) were evaluated. The evaluation results are shown in Table 3.

[Table 3] Blending Formula (Parts) Haze (%) Total Light Transmittance (%) DPHA Solvent Anti-Glare Film Particle Type (Parts) Example 11 100 100 Example 1 10 27.7 92.9 Example 12 100 100 Implementation Example 2 10 40.7 93.7 Example 13 100 100 Example 3 10 30.2 92.9 Example Η 100 100 Example 4 10 26.5 92.3 Example 15 100 100 Example 5 10 41.2 91.8 Example 16 100 100 Example 6 10 43.5 92.7 Implementation Example 17 100 100 Example 7 10 29.2 90.2 Example 18 100 100 Example 8 10 42.1 91.3 Example 19 100 100 Example 9 10 28.1 92.2 Example 20 100 100 Example 10 10 40.2 92.7 Comparative Example 7 100 100 Comparative Example 1 10 26.6 87.2 Comparative Example 8 100 100 Comparative Example 2 10 37.1 85.4 Comparative Example 9 100 100 Comparative Example 3 10 34.9 87.3 Comparative Example 10 100 100 Comparative Example 4 10 46, 4 89 J Comparative Example 11 100 100 Comparative Example 5 10 Poor and unable to form film Comparative Example 12 100 100 Comparative Example 6 10 Due to particle size: Substrate _ - - - 1 2.8 94.2 * 1 : PET (thickness: 200 μηι) -40- 200844174 As shown in Table 3 Example 1~l 〇 anti-glare film Opticals of Comparative Examples 7 to 12 produced by using any of the optical material molded articles (anti-glare film) of Examples 11 to 20 produced in any one of the examples and the particles for anti-glare film of Comparative Examples 1 to 6 In the material molded article (anti-glare film), it was confirmed that the particles for anti-glare film of Examples 1 to 1 which are excellent in dispersibility during polymerization in the aqueous solution and the dispersibility in the organic solvent are used, so that excellent anti-glare is exhibited. An optical material molded article excellent in balance between anti-glare property and white turbidity (transmissivity). Further, the optical material molded articles (anti-glare film) of Examples 1 to 20 produced by using any of the particles for anti-glare film of Examples 1 to 1 were used, and the anti-glare film of Comparative Examples 1 to 6 was used. As compared with the optical material molded articles (anti-glare film) of Comparative Examples 7 to 12 produced by any of the particles, the total light transmittance was remarkably high even in the high haze range. Further, in the particles for an anti-glare film of Comparative Examples 5 and 6, since a water-soluble polymer having a high content of a polar functional group was used as a dispersing agent, good non-polar solvent redispersibility could not be obtained. It is considered that the protective layer (the water-soluble polymer having a high polar functional group content) having a high polarity covers the particles for the anti-glare film, so that the affinity for the non-polar solvent is reduced, and the particles are likely to agglomerate each other. INDUSTRIAL APPLICABILITY The particles for an anti-glare film of the present invention have excellent dispersibility in an aqueous solution and an organic solvent, and exhibit excellent anti-glare properties, and prevent glare and white turbidity (transmission). For example, it is suitable for manufacturing an anti-glare film (anti-glare film), a light-diffusing film, a light-diffusing sheet, a polarizing plate, or a light guide plate, particularly an anti-glare film.

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Claims (1)

200844174 X. Patent Application No. 1 · A particle for an anti-glare film is obtained by the following steps: The average particle diameter of a polymer having a number average molecular weight of 2,000 to 1,500,000 is 0 · 4 to 9.0 μm a step of adding a monomer-containing polymer component to the aqueous dispersion of the seed particles, adding a water-soluble polymer (i) containing a polyethylene oxide structure to the aqueous dispersion, and containing all of the monomer units A step of at least one selected from the group consisting of water-soluble polymers (ii) constituting units of a polar functional group-containing monomer in a ratio of 80% by mass or less, and a step of polymerizing the polymerized component. 2. The particle for an anti-glare film according to the first aspect of the invention, wherein the content ratio of the structural unit derived from the monomer varies continuously or stepwise along the central portion toward the surface portion, and the average particle diameter thereof The particle for an anti-glare film according to the first aspect of the invention, wherein the refractive index system continuously changes along the central portion toward the surface portion. 4. The particle for an anti-glare film according to the first aspect of the invention, wherein the difference between the refractive index of the central portion and the refractive index of the surface portion is 0.01 to 〇. 5. The particle for an anti-glare film according to the first aspect of the invention, wherein the seed particle contains at least one monomer selected from the group consisting of an aromatic vinyl monomer and a (meth)acrylate monomer. The structural unit 〇6. The particle for an anti-glare film according to the first aspect of the patent application, wherein -43- 200844174 the monomer is an aromatic vinyl monomer or a (meth) acrylate monomer. A method for producing particles for an anti-glare film, comprising: in an aqueous dispersion of seed particles having an average particle diameter of 〇·4 to 9·0 μm, which is composed of a polymer having a number average molecular weight of 2,000 to 150,000; a step of adding a monomer-containing polymer component, wherein a water-soluble polymer (i) containing a polyethylene oxide structure and a ratio of 80% by mass or less to all monomer units are added to the aqueous dispersion. a step of at least one selected from the group consisting of water-soluble polymers (ii) of constituent units derived from a polar functional group-containing monomer, and a step of polymerizing the polymerized component. 8. The method for producing particles for an anti-glare film according to claim 7, wherein the content ratio of the structural unit derived from the monomer varies continuously or stepwise along the central portion toward the surface portion, and The method of manufacturing the particles for an anti-glare film according to item 7 of the patent application, wherein the refractive index is continuously changed along the central portion toward the surface portion, such as a patent application, wherein the average particle diameter is 0.8 to ΙΟμηι 〇. In the method for producing particles for an anti-glare film according to the seventh aspect, the difference between the refractive index of the central portion and the refractive index of the surface portion is 〇·〇1 to 0.15. The method for producing particles for an anti-glare film according to claim 7, wherein the seed particles contain at least one selected from the group consisting of an aromatic vinyl monomer and a (meth)acrylate monomer. The structural unit of the body -44 - 200844174. 12. The method for producing particles for an anti-glare film according to Item 7 of the δβ patent, wherein the precursor is a fragrant monomer or a (meth) propyl acrylate monomer. And a particle composition for an anti-glare film comprising: (A) particles for an anti-glare film according to the scope of the patent application; and (B) having a surface portion of the particles for the anti-glare film (A) A binder component that refracts a refractive index with the same degree of φ. 14. A method for producing a particle composition for an anti-glare film, which comprises mixing particles for an anti-glare film and a binder component of the first aspect of the invention to obtain a particle composition for an anti-glare film. The optical material molded article is a resin material containing a resin component and particles for an anti-glare film according to the first aspect of the patent application. 1 6 The optical material molded article of claim 15 which is an anti-glare film, a light-diffusing film, a light diffusing plate, a polarizing plate or a light guide plate. 41 1 7. An anti-glare film comprising: a base material layer and an anti-glare layer formed on at least one side of the base material layer by the particle composition for an anti-glare film of claim 13 . -45- 200844174 七明说单单单为图图表元的图图指表: Case generation diagram book this generation /--N 定一二指无无八, if the case has a chemical formula, please reveal the best display Chemical formula of the inventive feature