JPH0959603A - Anti-fog composition - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide an antifogging composition having excellent adhesion and capable of maintaining the antifogging property for a long period of time. (A) An aqueous emulsion of an acrylic resin having an ultraviolet absorbing group and / or a light stabilizing group, and
(B) An anti-fogging composition containing two components of an inorganic colloid sol as a main component, and the blending amount of the component (B) is 0.5 or more and 4 or less with respect to the component (A) in terms of solid content weight ratio.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an antifogging composition having excellent adhesion and capable of maintaining antifogging property for a long period of time.

[0002]

2. Description of the Related Art In recent years, various thermoplastic resins have been industrially produced and used in a wide variety of fields. Since many of the molded products produced from these thermoplastic resins have a hydrophobic surface, depending on the conditions such as temperature and humidity in which the molded product is used, the surface of the molded product may become cloudy, causing various inconveniences. I'm coming. For example, in goggles and safety glasses that use lenses made of synthetic resin, the visibility is impaired due to fogging, and in a food packaging film, the contents are difficult to see due to fogging. Further, in the agricultural film used for greenhouses, the penetration of sun rays deteriorates due to cloudiness, which slows down the growth of plants and causes water droplets generated by the aggregation of cloudy fine water droplets to fall on cultivated plants. , Young shoots may be harmed or cause disease.

In order to eliminate such inconvenience, it is known that the surface of the thermoplastic resin molded article should be provided with antifogging property. To impart antifogging property to the surface of a thermoplastic resin molded article, a method of kneading a hydrophilic substance such as a surfactant into a thermoplastic resin to prepare a molded article, or after forming a molded article, the surface of A method of applying a hydrophilic substance or a water-soluble polymer substance has been adopted.

However, in the former method, the hydrophilic substance kneaded into the thermoplastic resin is exposed and coordinated on the surface of the molded product to impart antifogging property to the molded product, but it easily flows out by water. There is a drawback that the antifogging property disappears within a short period of time. On the other hand, in the latter method, for example, Japanese Patent Publication No. 50-
No. 6437, Japanese Patent Publication No. 53-37075, etc., a method of applying a composition comprising a hydrophilic polymer and a surfactant has been proposed. Poor and inferior in adhesion to hydrophobic thermoplastic resin, the coating film derived from these hydrophilic substances is easily peeled off from the surface of the resin molded product and cannot exhibit sufficient antifogging performance especially under humid conditions. .

In order to improve these drawbacks, for example, Japanese Patent Publication No. 56-34219 proposes a method of insolubilizing a hydrophilic acrylate polymer containing a hydroxy group with a crosslinking agent. . However, according to this method, the antifogging property itself is also lowered, and therefore it cannot be said to be a satisfactory improvement method. On the other hand, as a method of imparting hydrophilicity, a method of applying a mixture of an inorganic aqueous sol and a surfactant has been proposed. For example, Japanese Patent Publication 50-11
Japanese Patent Publication No. 34831/1983 discloses a composition mainly containing a surfactant and a small amount of silica sol added thereto, and Japanese Patent Publication No. 49-32668 discloses a composition containing a surfactant added to an alumina sol. The official gazette discloses a colloidal silica to which a small amount of a water-soluble aluminum salt is added. However, since these mixtures have poor adhesion to the organic thermoplastic resin, the formed coating film has fallen off with the passage of time and has the drawback that the antifogging effect cannot be maintained for a long period of time.

In order to improve the above-mentioned adhesion defect, for example, JP-A-7-52343 proposes a combination of a polyolefin film containing a hindered amine compound and an inorganic aqueous sol. It is difficult to control the bleeding of the hindered amine compound contained in the film surface to a sufficient amount, therefore, the adhesion is reduced, the antifogging effect is impaired in a short time, and the bleeding hindered amine compound Due to the small molecular weight, the inorganic aqueous sol in the formed coating film has a drawback that it will fall out together with the hindered amine compound over time, and the antifogging effect cannot be maintained for a long period of time.

Further, in JP-A-5-112725 and JP-A-5-124161, the hindered amine compound in the film is made to have a high molecular weight by copolymerizing the hindered amine compound with ethylene, thereby forming an antifogging film. Proposals have been made to improve durability, but since the main components of the coating film are inorganic aqueous sol and hydrophilic organic compound as the main components, the water resistance is poor and the formed coating film falls off over time. It was difficult to maintain the antifogging effect for a long period of time.

[0008]

DISCLOSURE OF THE INVENTION The present inventor has solved the conventional drawbacks described above, has excellent adhesion, and is capable of imparting a long-lasting antifogging property to the surface of a molded article. As a result of extensive studies to provide a composition, the present invention has been completed.

[0009]

The gist of the present invention is, therefore, that (A) an aqueous emulsion of an acrylic resin having an ultraviolet absorbing group and / or a photostable group, and
(B) An antifogging composition having two components of an inorganic colloid sol as a main component, and a blending amount of the component (B) being 0.5 or more and 4 or less with respect to the component (A) in terms of solid content weight ratio. .

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below.
The acrylic resin having an ultraviolet absorbing group and / or a light stabilizing group, which is the component (A) of the antifogging composition of the present invention,
In the present invention, an acrylic resin obtained by emulsion polymerization of a mixture of an ultraviolet absorbing monomer and / or a light stable monomer and a vinyl monomer copolymerizable therewith in an aqueous medium, or An acrylic resin obtained by mixing the acrylic resin obtained here with an acrylic resin containing no ultraviolet absorbing group or light-stabilizing group.

The UV-absorbing monomer may be any UV-absorbing monomer, and specifically, the polymerizable 2-hydroxybenzophenone derivative represented by the following general formula (I) or the general formula (II And a polymerizable 2-hydroxybenzotriazole derivative represented by the formula (1).

[0012]

Embedded image

R ¹ : hydrogen, an alkyl group having 1 to 6 carbon atoms or an oxyalkyl group R ² : an alkylene group having 1 to 10 carbon atoms or an oxyalkylene group or none (in this case, X is directly bonded to the benzene ring) ) X: ester bond, amide bond, ether bond or urethane bond R ³ : hydrogen or lower alkyl group

[0014]

Embedded image

R ⁴ : hydrogen, halogen or a methyl group R ⁵ : hydrogen, a hydrocarbon group having 1 to ⁶ carbon atoms R ⁶ : an alkylene group or oxyalkylene group having 1 to 10 carbon atoms or none (in this case, X is benzene rings bonded directly) X: ester bond, amide bond, ether bond or urethane bond R ^7: an alkylene group having 1 to 8 carbon atoms, an alkyl group having a hydroxyl group at the amino alkylene group or side chain or does not exist, (this In the case, X is directly bonded to the benzene ring) R ⁸ : hydrogen or a lower alkyl group

Examples of the monomer represented by the general formula (I) include 2-hydroxy-4-acryloyloxybenzophenone, 2-hydroxy-4-methacryloyloxybenzophenone and 2-hydroxy-4- (2-acryloyloxy. ) Ethoxybenzophenone, 2-hydroxy-4- (2-methacryloyloxy) ethoxybenzophenone, 2-hydroxy-4- (2-methyl-2-acryloyloxy) ethoxybenzophenone and the like.

Examples of the monomer represented by the general formula (II) include 2- [2'-hydroxy-5 '-(methacryloyloxy) phenyl] benzotriazole and 2-
[2'-hydroxy-5 '-(acryloyloxy) phenyl] benzotriazole, 2- [2'-hydroxy-3'-t-butyl-5'-(methacryloyloxy)
Phenyl] benzotriazole, 2- [2'-hydroxy-3'-methyl-5 '-(acryloyloxy) phenyl] benzotriazole, 2- [2'-hydroxy-
5 '-(methacryloyloxypropyl) phenyl]-
5-chlorobenzotriazole, 2- [2'-hydroxy-5 '-(methacryloyloxyethyl) phenyl]
Benzotriazole, 2- [2'-hydroxy-5'-
(Acryloyloxyethyl) phenyl] benzotriazole, 2- [2'-hydroxy-3'-t-butyl-
5 '-(methacryloyloxyethyl) phenyl] benzotriazole, 2- [2'-hydroxy-3'-methyl-5'-(acryloyloxyethyl) phenyl] benzotriazole, 2- [2'-hydroxy-5'-
(Methacryloyloxypropyl) phenyl] -5-chlorobenzotriazole, 2- [2'-hydroxy-
5 '-(methacryloyloxyethyl) phenyl] benzotriazole, 2- [2'-hydroxy-5'-(acryloyloxyethyl) phenyl] benzotriazole, 2- [2'-hydroxy-3'-t-butyl-5 ′
-(Methacryloyloxyethyl) phenyl] benzotriazole, 2- [2'-hydroxy-3'-methyl-
5 '-(acryloyloxyethyl) phenyl] benzotriazole, 2- [2'-hydroxy-5'-(methacryloyloxypropyl) phenyl] -5-chlorobenzotriazole, 2- [2'-hydroxy-5'-
(Acroyloxybutyl) phenyl] -5-methylbenzotriazole, [2-hydroxy-3-t-butyl-5- (acryloyloxyethoxycarbonylethyl) phenyl] benzotriazole and the like can be mentioned. Further, the light-stable monomer may be any one as long as it has light-stable performance, and specific examples thereof include a polymerizable hindered amine derivative represented by the following general formula (III).

[0018]

[Chemical 6]

(Wherein R ¹ and R ² represent a hydrogen atom or a methyl group, and R ³ represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms) The light stability represented by the general formula (III) Specific examples of the monomer are as follows. 4-acryloyloxy-2,2,6,6-tetramethylpiperidine 4-acryloyloxy-1,2,2,6,6-pentamethylpiperidine 4-acryloyloxy-1-ethyl-2,2,6,6
-Tetramethylpiperidine 4-acryloyloxy-1-propyl-2,2,6,
6-Tetramethylpiperidine 4-acryloyloxy-1-butyl-2,2,6,6
-Tetramethylpiperidine 4-methacryloyloxy-2,2,6,6-tetramethylpiperidine 4-methacryloyloxy-1,2,2,6,6-pentamethylpiperidine 4-methacryloyloxy-1-ethyl-2,2 , 6,
6-tetramethylpiperidine 4-methacryloyloxy-1-butyl-2,2,6
6-Tetramethylpiperidine 4-Critonoyloxy-2,2,6,6-tetramethylpiperidine 4-Critonoyloxy-1-propyl-2,2,6,6
6-tetramethylpiperidine

These light-stable monomers and ultraviolet absorbing monomers may be used alone or in combination. Particularly when a light-stable monomer and a UV-absorbing monomer are used in combination, the effect of sustaining the antifogging performance is large and preferable. Further, these ultraviolet absorbing monomers and / or light stable monomers are
It may be used in the range of 1 to 99.9% by weight and copolymerized, but in the acrylic resin finally used in the present invention, the acrylic resin of the ultraviolet absorbing monomer and / or the light stable monomer is used. The proportion of the resin in the resin is preferably 0.1 to 20% by weight. When it exceeds 20% by weight,
It is not preferable because the antifogging effect does not improve in proportion to the blended amount.

The above-mentioned UV absorbing monomer or /
Examples of the vinyl monomer copolymerizable with the light-stable monomer include α, β-ethylenic acid such as acrylic acid, methacrylic acid, maleic acid, maleic anhydride, fumaric acid, crotonic acid, and itaconic acid. Unsaturated carboxylic acids; α, β-ethylenically unsaturated sulfonic acids such as ethylene sulfonic acid; 2-acrylamido-2-methylpropanoic acid;
α, β-ethylenically unsaturated phosphonic acids; hydroxy group-containing vinyl monomers such as hydroxyethyl of acrylic acid or methacrylic acid; acrylonitriles; acrylic amides; glycidyl esters of acrylic acid or methacrylic acid; acrylic acid or methacrylic acid Alkyl esters (hereinafter referred to as acrylic acid alkyl esters). ]; And alkenylbenzenes and the like.

The alkyl acrylates include
For example, acrylic acid methyl ester, acrylic acid ethyl ester, acrylic acid-n-propyl ester, acrylic acid isopropyl ester, acrylic acid-n-butyl ester, acrylic acid-2-ethylhexyl ester, acrylic acid decyl, methacrylic acid methyl ester, methacrylic acid Acid ethyl ester, methacrylic acid-n-propyl ester, methacrylic acid isopropyl ester, methacrylic acid-n-butyl ester, methacrylic acid-2-ethylhexyl ester, decyl methacrylate, and the like. Generally, the number of carbon atoms of the alkyl group is 1 to 20 acrylic acid alkyl ester and / or methacrylic acid alkyl ester having 1 to 20 carbon atoms in the alkyl group are used.

Examples of the alkenylbenzenes include styrene, α-methylstyrene, vinyltoluene and the like. These monomers may be used alone or in combination of two or more kinds. When mixed with an acrylic resin having no ultraviolet absorbing group or light-stabilizing group, an acrylic resin obtained by copolymerizing these vinyl monomers may be used. As a surfactant used when producing an acrylic resin,
It may be an anionic surfactant, a cationic surfactant or a nonionic surfactant.

Examples of the anionic surfactant include fatty acid salts such as sodium oleate and potassium oleate; higher alcohol sulfates such as sodium lauryl sulfate and ammonium lauryl sulfate; sodium dodecylbenzenesulfonate and alkylnaphthalenesulfonic acid. Alkylbenzene sulfonates and alkylnaphthalene sulfonates such as sodium; Naphthalene sulfonate formalin condensates; Dialkyl sulfosuccinates; Dialkyl phosphate salts; There are ethylene sulfate salts and the like.

Examples of the cationic surfactant include ethanolamines; laurylamine acetate, triethanolamine monostearate formate; amine salts such as stearamidoethyldiethylamine acetate; lauryltrimethylammonium chloride, stearyltrimethylammonium chloride. , Quaternary ammonium salts such as dilauryldimethylammonium chloride, distearyldimethylammonium chloride, lauryldimethylbenzylammonium chloride and stearyldimethylbenzylammonium chloride.

Examples of the nonionic surfactants include polyoxyethylene higher alcohol ethers such as polyoxyethylene lauryl alcohol, polyoxyethylene lauryl ether and polyoxyethylene oleyl ether; polyoxyethylene octylphenol, polyoxyethylene nonylphenol and the like. Polyoxyethylene alkylaryl ethers; Polyoxyethylene acyl esters such as polyethylene glycol monostearate; Polypropylene glycol ethylene oxide adducts; Polyoxyethylene such as polyoxyethylene sorbitan monolaurate and polyoxyethylene sorbitan monostearate There are sorbitan fatty acid esters; sugar esters; cellulose ethers and the like.

These may be used alone or in combination, but are limited depending on the type of inorganic colloid sol to be blended. That is, a combination of a silica sol and a cationic surfactant, which are generally negatively charged in an aqueous solution, and an alumina sol and an anionic surfactant, which are generally positively charged in an aqueous solution, should be avoided. These combinations easily cause gelation of the sol and aggregation / separation of the antifogging composition, which makes application difficult. These surfactants are used in the range of 0.1 to 10% by weight based on the total amount of the charged monomers.
If it exceeds 10% by weight, the water resistance of the dried coating film is deteriorated, which is not preferable.

Examples of polymerization initiators used in the production of acrylic resins include persulfates such as ammonium persulfate and potassium persulfate; organic peroxides such as acetyl peroxide and benzoyl peroxide. These are used in the range of 0.1 to 10% by weight based on the total amount of the charged monomers. The polymerization method for obtaining the acrylic resin of the present invention is a batchwise charging method of monomers,
A continuous feeding method may be used. In addition, after polymerizing a part of it first,
A method of continuously feeding the rest may be used.

The monomer continuously fed may be as it is, but a method of feeding it as a monomer dispersion liquid using water and a surfactant is very suitable. The aqueous emulsion of the acrylic resin, which is a constituent of the composition of the present invention, is a liquid dispersion even if the aqueous emulsion obtained by emulsion polymerization in the presence of each monomer and a surfactant is used as it is. It may be diluted by adding a medium, or may be obtained by separately collecting the polymer produced by the above polymerization and redispersing it in a liquid dispersion medium to obtain an aqueous emulsion.

The inorganic colloid sol, which is the component (B) of the antifogging composition of the present invention, exerts the function of imparting hydrophilicity to the surface of a molded product by applying it to the surface of a hydrophobic molded product. Examples of the inorganic colloid sol include inorganic aqueous colloid particles such as silica, alumina, water-insoluble lithium silicate, iron hydroxide, tin hydroxide, titanium oxide, and barium sulfate, which are dispersed in water or a hydrophilic medium by various methods. Also, an aqueous sol can be used. Among them, silica sol and alumina sol are preferable. These may be used alone or in combination.

The inorganic colloid sol used preferably has an average particle size in the range of 5 to 100 mμ. Within this range, two or more types of colloid sols having different average particle sizes may be used in combination. If the average particle diameter exceeds 100 mμ, not only the coating film tends to be white and devitrified, but also the antifogging sustainability decreases, which is not preferable. If it is less than 5 μm, the stability of the inorganic colloid sol may be lacking.

It is important that the content of the inorganic colloid sol in the solid content weight ratio is 0.5 to 4 with respect to the acrylic resin. That is, when less than 0.5,
Can not exert sufficient anti-fog effect. Further, when it exceeds 4, not only the antifogging effect does not improve in proportion to the compounding amount, but when the molded product is transparent, the coating film formed after coating becomes cloudy to reduce the light transmittance, and However, it is not suitable because the coating film is rough and easily vulnerable.

A cross-linking agent is preferably added to the antifogging composition of the present invention. That is, the acrylic resin is cross-linked by this cross-linking agent, and the water resistance can be improved.
Examples of the crosslinking agent to be added to the antifogging composition of the present invention include phenol resins, amino resins, amine compounds, aziridine compounds, azo compounds, isocyanate compounds, epoxy compounds and silane compounds. Among them, amine compounds, aziridine compounds and epoxy compounds are particularly preferable.

As amine compounds, aliphatic polyamines such as diethylenetriamine, triethylenepentamine and hexamethylenediamine; 3,3'-dimethyl-4,
Alicyclic amines such as 4'-diaminodicyclohexylmethane and isophoronediamine; and aromatic amines such as 4,4'-diaminodiphenylmethane and m-phenylenediamine are used.

Examples of aziridine compounds include tris-
2,4,6- (1-aziridinyl) -1,3,5-triazine, trimethylolpropane-tri-β-aziridinylpropionate, tris [1- (2-methyl) aziridinyl] phosphine oxide, hexa [1- (2-Methyl) -aziridinyl] triphosphatriazine and the like are used.

As the epoxy compounds, a reaction product of bisphenol A or bisphenol F and epichlorohydrin, an epoxidized novolac resin produced by a reaction of a resin reaction product of phenol (or a substituted phenol) with formaldehyde and epichlorohydrin,
Resinous reaction products formed from epichlorohydrin and aliphatic polyhydric alcohols such as glycerol, 1,4-butanediol, poly (oxypropylene) glycol or similar polyhydric alcohol components and resins obtained by epoxidation with peracetic acid Etc. are used. In the case of epoxy compounds, it is preferable to use a tertiary amine or a quaternary ammonium salt in combination as a catalyst.

These crosslinking agents can be used in an amount of 0.1 to 30% by weight based on the solid content of acrylic resin. In particular, the range of 0.5 to 10% by weight is preferable. Further, a liquid dispersion medium is added to the antifogging composition of the present invention as needed. Such liquid dispersion media include hydrophilic or water-miscible solvents including water, and water; monohydric alcohols such as methyl alcohol, ethyl alcohol, and isopropyl alcohol; polyhydric alcohols such as ethylene glycol, diethylene glycol, and glycerin. Cyclic alcohols such as benzyl alcohol; cellosolve acetates; ketones and the like. These liquid dispersion media may be used alone or in combination, but the dispersion stability of the antifogging composition according to the present invention, the wettability after coating on the surface of the molded article, the difficulty of removing the liquid dispersion medium, and the economy. It is preferable to decide in consideration of sex.

The antifog composition of the present invention may further contain, if necessary, an antifoaming agent, a surfactant, a plasticizer, a film-forming aid, a thickener,
Conventional additives such as pigments and pigment dispersants can be mixed. The antifogging composition according to the present invention is applied to the surface of a molded article, and is forcedly dried or naturally dried to form a coating film by volatilizing a liquid dispersion medium, thereby improving the antifogging performance of the molded article surface. It is something that is demonstrated.

As a method of forcibly drying, hot air drying method,
An infrared radiation method or the like can be adopted. The heating temperature for forced drying is determined according to the applied anti-fogging composition, but is used in the range of 50 to 250 ° C, preferably 70 to 200 ° C. The molded article to which the anti-fogging composition can be applied is not particularly limited as long as it does not impair the characteristics of the present invention. In general, molded articles whose features are remarkably recognized include plastics, inorganic glass, transparent ceramics, metals, and mirror-finished materials. Among these, examples of particularly high practical value are plastic molded products, plastic films, inorganic glass lenses, building windows,
Examples thereof include bathroom windows, windows of vehicles such as automobiles or trains, aircraft, and ships.

The antifogging composition of the present invention can be applied to the surface of a molded article by any known method such as roll coating method, dip coating method, brush coating method, spray coating method, bar coating method and knife coating method. It depends on the method. The anti-fogging composition is applied to the surface of the molded product, and the liquid dispersion medium is dried,
The amount of solid matter deposited after volatilization is 0.01 to 10 g /
It is preferably in the range of m ² , particularly 0.1 to 5 g / m ² . If the adhesiveness between the surface of the molded article and the coating film derived from the antifogging composition according to the present invention is not sufficient, the surface of the molded article is subjected to plasma treatment or corona discharge treatment before coating. It is preferable to modify the surface of the molded product by applying it or the like.

[0041]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to embodiments, but the present invention is not limited to the following examples unless it exceeds the gist. (1) Preparation of acrylic resin Resins A to K Four-necked flask was charged with 2 parts by weight of polyoxyethylene lauryl ether and 80 parts by weight of water, and heated to 60 ° C. under a nitrogen gas stream, and ammonium persulfate of 0. 5 parts by weight was added, and the mixture 1 of each monomer shown in Table 1 was further added.
00 parts by weight were added dropwise over 3 hours. The reaction temperature at this time is maintained in the range of 60 to 70 ° C., but after the dropping is completed, the reaction temperature is maintained in the same temperature range for 2 hours, cooled, and neutralized with aqueous ammonia to obtain an acrylic resin emulsion (resin A to
K) was obtained.

(2) Preparation of antifogging composition Various kinds of antifogging compositions were prepared by blending the acrylic resin emulsions obtained in the above production examples with the inorganic colloid sols of the types and amounts shown in Table 2 and others. The thing was prepared. (3) Formation of coating film and evaluation of coating film The coating amount (as solid content) of the obtained antifogging composition after drying was 0.1 on the surface of a molded article shown in Table 3 by a bar coating method. It was applied at 5 g / m ² and allowed to stay in hot air at 90 ° C. for 1 minute to scatter the solvent. With respect to the properties of the coating film formed on the obtained molded article, various properties were evaluated by the methods described below.

Adhesiveness Cellophane tape was adhered to the surface of the obtained molded product on which the coating film was formed, and when the cellophane tape was peeled off, the peeling state of the coating film was observed with the naked eye. The results are shown in Table-3. The evaluation criteria are as follows. A: The coating film did not peel off at all and remained completely. Good: 2/3 or more of the coating film remained without peeling. Δ: 2/3 or more of the coating film peeled off. X: The coating film was completely peeled off.

Anti-fogging property The obtained molded product was placed on the outside of a test field in a single roof type house (frontage: 2 m, depth: 20 m, ridge height: 2 m, roof slope: 30 degrees), and the surface provided with the coating film was placed inside the house. The coating was performed and the expansion test was performed for 60 months (5 years). During the spreading test, the antifogging property of each molded product was visually observed over time. The results are shown in Table-3. The evaluation criteria are as follows. ⊙: Water adhered in a thin film and no water droplets were observed. ○: Water adheres in a thin film, but slightly large droplets are observed. Δ: A state in which adhesion of fine water droplets is partially recognized. ×: A state where fine water droplets are observed on the entire surface.

[0045]

[Table 1]

[0046]

[Table 2]

[0047]

[Table 3]

[0048]

[Table 4]

[0049]

[Table 5]

[0050]

INDUSTRIAL APPLICABILITY The antifogging composition of the present invention, when applied to a molded article, maintains the antifogging property for a long period of time and is excellent in adhesiveness. The utility value is extremely high.

Claims (8)

[Claims] 1. An aqueous emulsion of (A) an acrylic resin having an ultraviolet absorbing group and / or a light stabilizing group, and
(B) An anti-fogging composition containing two components of an inorganic colloid sol as a main component, and the blending amount of the component (B) is 0.5 or more and 4 or less with respect to the component (A) in terms of solid content weight ratio. 2. A monomer mixture in which the component (A) comprises an ultraviolet absorbing monomer or / and a photostable monomer and a vinyl monomer copolymerizable therewith in an aqueous medium. An aqueous emulsion obtained by emulsion polymerization.
The antifogging composition as described. 3. The component (A), wherein the ratio of the ultraviolet absorbing monomer and / or the light stable monomer in the acrylic resin is 0.1 to 20% by weight. The antifogging composition as described. 4. The antifogging composition according to any one of claims 1 to 3, wherein the component (B) is silica sol or alumina sol. 5. The average particle diameter of component (B) is 5 to 100 m.
The anti-fogging composition according to any one of claims 1 to 4, which is μ. 6. An antifogging composition comprising the antifogging composition according to any one of claims 1 to 5 and a crosslinking agent as the component (A). 7. The ultraviolet absorbing monomer used as the component (A) is at least one ultraviolet absorbing monomer selected from the general formula (I) and / or the general formula (II). The antifogging composition according to any one of 6 above. Embedded image R ¹ : hydrogen, an alkyl group having 1 to 6 carbon atoms or an oxyalkyl group R ² : an alkylene group having 1 to 10 carbon atoms or an oxyalkylene group, or absent (in this case, X is directly bonded to the benzene ring) X: Ester bond, amide bond, ether bond or urethane bond R ³ : hydrogen or lower alkyl group R ^4: hydrogen, halogen or a methyl group R ^5: hydrogen, a hydrocarbon radical R ⁶ 1 to 6 carbon atoms: absent or an alkylene group or an oxyalkylene group having 1 to 10 carbon atoms (in this case X is a benzene ring X: ester bond, amide bond, ether bond or urethane bond R ⁷ : alkylene group having 1 to 8 carbon atoms, aminoalkylene group or alkyl group having hydroxyl group in side chain, or not present (in this case X Is directly bonded to the benzene ring) R ⁸ : hydrogen or a lower alkyl group 8. The light-stable monomer used as the component (A) is at least one light-stable monomer selected from the general formula (III). The antifogging composition as described. Embedded image R ¹ : hydrogen or a methyl group R ² : hydrogen or a methyl group R ³ : hydrogen or an alkyl group having 1 to 4 carbon atoms