JP2998604B2 - Antifogging composition - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antifogging composition which has excellent adhesion and can maintain antifogging properties over a long period of time.

[0002]

2. Description of the Related Art In recent years, various thermoplastic resins have been industrially manufactured and used in a wide range of fields. Many molded articles manufactured from these thermoplastic resins have a hydrophobic surface, and depending on the temperature, humidity, and other conditions at which the molded article is used, the surface of the molded article may become cloudy, causing various inconveniences. I'm coming. For example, in goggles, safety glasses, and the like using a synthetic resin lens, the view becomes invisible due to fogging, and in a food packaging film, the contents become difficult to see due to fogging. In addition, in agricultural films used in greenhouses, the penetration of sunlight is deteriorated due to cloudiness, the growth of plants is slowed down, and water droplets generated by aggregation of cloudy fine water droplets fall on cultivated plants by The germ may be harmed or cause disease.

It is known that in order to solve such inconvenience, it is only necessary to impart anti-fogging property to the surface of a thermoplastic resin molded product. In order to impart anti-fog properties 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 form a molded article, or after forming a molded article, apply And a method of applying a hydrophilic substance or a water-soluble polymer substance.

However, in the former method, the hydrophilic substance kneaded in the thermoplastic resin is blown out and coordinated on the surface of the molded article to impart antifogging property to the molded article, but it is easy to flow out by water. There is a disadvantage that the antifogging property is lost within a short period of time. On the other hand, in the latter method, for example,
JP-A-6437 and JP-B-53-37075 have proposed a method of applying a composition comprising a hydrophilic polymer and a surfactant. However, these hydrophilic substances are susceptible to hydrolysis, so that they have low water resistance. Poor and poor adhesion to hydrophobic thermoplastic resin, especially under humid conditions, coatings derived from these hydrophilic substances easily peel off from the surface of the resin molded product, and cannot sufficiently exhibit antifogging performance .

In order to improve these drawbacks, for example, Japanese Patent Publication No. Sho 56-34219 proposes a method of insolubilizing a hydroxyl group-containing hydrophilic acrylate polymer with a crosslinking agent. . However, according to this method, the antifogging property itself is simultaneously lowered, so that it is not a satisfactory improvement method. On the other hand, as a method for imparting hydrophilicity, a method of applying a mixture of an inorganic aqueous sol and a surfactant has been proposed. For example, Japanese Patent Publication No. 50-11
Japanese Patent Publication No. 348/348 discloses a composition mainly composed of a surfactant and a small amount of silica sol added thereto, and Japanese Patent Publication No. 49-32668 discloses a composition obtained by adding a surfactant to an alumina sol. The gazette discloses colloidal silica obtained by adding a small amount of a water-soluble aluminum salt. However, since these mixtures have poor adhesion to an organic thermoplastic resin, the formed coating film falls off with the passage of time, and there is a drawback that the antifogging effect cannot be maintained for a long time.

[0006] In order to improve the above-mentioned disadvantage of adhesion, for example, Japanese Patent Application Laid-Open No. 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, so that the adhesion is reduced, the effectiveness of the antifogging property is impaired in a short time, and the bleeding hindered amine compound Since the molecular weight is small, the inorganic aqueous sol in the formed coating film falls off together with the hindered amine compound with the passage of time, and there is a disadvantage that the antifogging effect cannot be maintained for a long time.

Further, JP-A-5-112725 and JP-A-5-124161 disclose that a hindered amine compound in a film is made to have a high molecular weight by copolymerizing the hindered amine compound with ethylene to thereby prevent the formed coating film from being fogged. Proposals have been made to improve durability, but since the main component of the coating film is mainly composed of an inorganic aqueous sol and a hydrophilic organic compound, the water resistance is poor, and the formed coating film falls off over time. It was difficult to maintain the anti-fogging effect for a long time.

[0008]

SUMMARY OF THE INVENTION The present inventors have solved the above-mentioned conventional drawbacks, have excellent adhesion, and can provide a long-lasting anti-fogging property to the surface of a molded article. As a result of intensive studies to provide a composition, the present invention has been completed.

[0009]

SUMMARY OF THE INVENTION The gist of the present invention is to provide (A) an aqueous emulsion of an acrylic resin having an ultraviolet absorbing group and / or a photostable group;
(B) An anti-fogging composition containing two components of an inorganic colloid sol as a main component, and having a compounding amount of the component (B) of not less than 0.5 and not more than 4 based on the weight of the component (A). .

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.
The acrylic resin having an ultraviolet absorbing group and / or a photostable 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 comprising an ultraviolet absorbing monomer or / and a light stable monomer and a vinyl monomer copolymerizable therewith in an aqueous medium, or And an acrylic resin obtained by mixing the acrylic resin obtained here and an acrylic resin containing no ultraviolet absorbing group or photostable group.

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

[0012]

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R ¹ : hydrogen, alkyl or oxyalkyl group having 1 to 6 carbon atoms R ² : alkylene group or oxyalkylene group having 1 to 10 carbon atoms or not present (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]

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R ⁴ : hydrogen, halogen or methyl group R ⁵ : hydrogen, hydrocarbon group having 1 to ⁶ carbon atoms R ⁶ : alkylene group or oxyalkylene group having 1 to 10 carbon atoms or not present (in this case, X is X: ester bond, amide bond, ether bond or urethane bond R ⁷ : alkylene group having 1 to 8 carbon atoms, aminoalkylene group, alkyl group having hydroxyl group in side chain, or not present In the case, X is directly bonded to the benzene ring.) R ⁸ : hydrogen or 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,
[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'-hydroxylocyl-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. The light-stable monomer only needs to have light-stability, and specific examples thereof include a polymerizable hindered amine derivative represented by the following general formula (III).

[0018]

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(Wherein, R ¹ and R ^{2 each} 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). 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-critonoyyloxy-2,2,6,6-tetramethylpiperidine 4-critonoyyloxy-1-propyl-2,2,6
6-tetramethylpiperidine

These light-stable monomers and ultraviolet-absorbing monomers may be used alone or in combination. In particular, when a light-stable monomer and an ultraviolet-absorbing monomer are used in combination, a long-lasting effect of antifogging performance is preferred. In addition, these ultraviolet absorbing monomers and / or light-stable monomers may be used in an amount of 0.1 to 0.2.
It may be used and copolymerized in the range of 1 to 99.9% by weight, but finally, in the acrylic resin used in the present invention, the acrylic resin of the ultraviolet absorbing monomer and / or the light stable monomer is used. It is preferable that the proportion in the system resin is 0.1 to 20% by weight. If it exceeds 20% by weight,
It is not preferable because the anti-fogging effect is not improved in proportion to the compounding amount.

Further, the above-mentioned UV-absorbing monomer and / or
And vinyl monomers copolymerizable with the light-stable monomer include, for example, α, β-ethylenic acids 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; hydroxyl-containing vinyl monomers such as hydroxyethyl of acrylic acid or methacrylic acid; acrylonitriles; acrylamides; glycidyl esters of acrylic acid or methacrylic acid; acrylic acid or methacrylic acid (Hereinafter referred to as alkyl acrylates). And alkenylbenzenes.

The alkyl acrylates include:
For example, methyl acrylate, ethyl acrylate, n-propyl acrylate, isopropyl acrylate, n-butyl acrylate, 2-ethylhexyl acrylate, decyl acrylate, methyl methacrylate, methacryl 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. 1 to 20 alkyl acrylates and / or alkyl methacrylates 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. When mixed with an acrylic resin having no ultraviolet absorbing group or light stable group, an acrylic resin obtained by copolymerizing these vinyl monomers or the like may be used. As a surfactant used when producing an acrylic resin,
Any of an anionic surfactant, a cationic surfactant, and a nonionic surfactant may be used.

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; alkylnaphthalenesulfonic acid Alkyl benzene sulfonate and alkyl naphthalene sulfonate such as sodium; naphthalene sulfonic acid formalin condensate; dialkyl sulfosuccinate; dialkyl phosphate salt; polyoxyethylene such as sodium polyoxyethylene alkyl ether sulfate and sodium polyoxyethylene alkyl phenyl ether sulfate And ethylene sulfate salts.

Examples of the cationic surfactant include ethanolamines; laurylamine acetate, triethanolamine monostearate formate; amine salts such as stearamidoethyldiethylamine acetate; lauryltrimethylammonium chloride, stearyltrimethylammonium chloride. And quaternary ammonium salts such as dilauryl dimethyl ammonium chloride, distearyl dimethyl ammonium chloride, lauryl dimethyl benzyl ammonium chloride, and stearyl dimethyl benzyl ammonium chloride.

Examples of the nonionic surfactant include polyoxyethylene higher alcohol ethers such as polyoxyethylene lauryl alcohol, polyoxyethylene lauryl ether and polyoxyethylene oleyl ether; polyoxyethylene octyl phenol, polyoxyethylene nonyl phenol and the like. Polyoxyethylene alkyl aryl ethers; polyoxyethylene acyl esters such as polyethylene glycol monostearate; polypropylene glycol ethylene oxide adducts; polyoxyethylene such as polyoxyethylene sorbitan monolaurate and polyoxyethylene sorbitan monostearate Sorbitan fatty acid esters; sugar esters; cellulose ethers.

These may be used alone or in combination, but are restricted depending on the kind of the inorganic colloid sol to be blended. That is, a combination of a silica sol and a cationic surfactant, which are generally charged to an anionic charge in an aqueous solution, and a combination of an alumina sol and an anionic surfactant, generally charged to a positive charge in an aqueous solution, should be avoided. These combinations tend to cause gelation of the sol and aggregation / separation of the antifogging composition, making application difficult. These surfactants are used in the range of 0.1 to 10% by weight based on the total amount of charged monomers.
If it exceeds 10% by weight, the water resistance of the dried coating film is undesirably reduced.

Examples of the polymerization initiator used in producing the acrylic resin include persulfates such as ammonium persulfate and potassium persulfate; and 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 charged monomers. The polymerization method for obtaining the acrylic resin of the present invention, even if the charging method of the monomer is a batch method,
A continuous feeding method may be used. Also, after polymerizing part first,
A method of continuously feeding the remainder may be used.

Although the monomer to be continuously fed may be used as it is, a method of feeding as a monomer dispersion using water and a surfactant is extremely suitable. The aqueous emulsion of the acrylic resin, which is a component of the composition of the present invention, can be used as it is in the presence of each monomer and a surfactant in the presence of an aqueous emulsion obtained by emulsion polymerization. The polymer may be diluted by adding a medium, or a polymer produced by the above-described polymerization may be separately collected and redispersed in a liquid dispersion medium to form an aqueous emulsion.

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

The inorganic colloid sol to be used preferably has an average particle diameter in the range of 5 to 100 μm. 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 μm, not only does the coating film tend to be white and devitrified, but also the antifogging durability decreases, which is not preferred. If it is less than 5 μm, the stability of the inorganic colloid sol may be lacking.

It is important that the amount of the inorganic colloid sol is 0.5 to 4 based on the weight of the acrylic resin in terms of the solid content by weight. That is, when less than 0.5,
Sufficient anti-fog effect cannot be exhibited. When it exceeds 4, not only does the anti-fog effect not increase in proportion to the blending amount, but when the molded article is transparent, the coating film formed after application becomes cloudy and reduces the light transmittance. This is unsuitable because the coating film is rough and vulnerable to weakness.

The antifogging composition of the present invention preferably contains a crosslinking agent. That is, the acrylic resin is cross-linked by the cross-linking agent, and the water resistance can be improved.
Examples of the crosslinking agent to be blended in the antifogging composition of the present invention include phenolic resins, amino resins, amine compounds, aziridine compounds, azo compounds, isocyanate compounds, epoxy compounds, silane compounds and the like. Among them, amine compounds, aziridine compounds and epoxy compounds are particularly preferable.

Examples of the amine compounds include 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.

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.

Epoxy compounds include epoxidized novolak resins formed by the reaction of bisphenol A or bisphenol F with epichlorohydrin, the resin reaction product of phenol (or 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 the 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, if necessary. 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. However, the dispersion stability of the antifogging composition according to the present invention, the wettability after application to the surface of a molded article, the difficulty of removing the liquid dispersion medium, and the economy It is preferable to decide in consideration of the nature.

The anti-fogging 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, forcibly dried or air-dried, and forms a coating film by volatilizing a liquid dispersion medium. It is something to show.

As a method of forcibly drying, hot air drying method,
An infrared radiation method or the like can be adopted. The heating temperature at the time of forced drying is determined by the applied antifogging composition, but is used in the range of 50 to 250 ° C, preferably 70 to 200 ° C. The molded article to which the antifogging composition can be applied is not particularly limited as long as the properties of the present invention are not impaired. In general, molded articles whose characteristics are remarkably recognized include plastics, inorganic glasses, transparent ceramics, metals, and mirror materials. Among these, examples of particularly high practical value are plastic molded products, plastic films, inorganic glass lenses, windows of buildings,
Examples include bathroom windows, vehicle windows such as cars or trains, aircraft, ships, and the like.

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

[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 AK In a four-necked flask, 2 parts by weight of polyoxyethylene lauryl ether and 80 parts by weight of water were charged and heated to 60 ° C. under a stream of nitrogen gas. 5 parts by weight, and a mixture 1 of each monomer shown in Table 1 was further added.
00 parts by weight were added dropwise over 3 hours. At this time, the reaction temperature is kept in the range of 60 to 70 ° C., but after the dropping, the temperature is kept in the same temperature range for 2 hours, cooled, neutralized with aqueous ammonia, and the acrylic resin emulsion (resin A to
K) was obtained.

(2) Preparation of Antifogging Composition The acrylic resin emulsion obtained in the above Production Example was mixed with inorganic colloid sols of the type and amount shown in Table 2 and others to obtain various antifogging compositions. Was prepared. (3) Formation of coating film and evaluation of coating film The obtained antifogging composition was applied to the surface of the molded article shown in Table 3 by a bar coating method so that the coating amount (as solid content) after drying was 0. The solution was applied so as to have a concentration of 5 g / m ^2, and was kept in hot air at 90 ° C. for 1 minute to disperse the solvent. Various properties of the coating film formed on the obtained molded article were evaluated by the methods described below.

Adhesion A cellophane tape was adhered to the surface of the obtained molded article on which the coating film was formed, and when the cellophane tape was peeled off, the peeling state of the coating film was visually observed. Table 3 shows the results. The evaluation criteria are as follows. A: The coating film did not peel at all and remained completely. …: 2/3 or more of the coating film remained without peeling. Δ: 2/3 or more of the coating film peeled off. ×: The coating film was completely peeled off.

Antifogging property The obtained molded article was placed on a single roof house (frontage 2 m, depth 20 m, ridge height 2 m, roof slope 30 °) placed in an outdoor test field, and the surface on which the coating film was provided was placed inside the house. , And a 60-month (5 years) expansion test was performed. During the extension test, the antifogging property of each molded article was visually observed with time. The results are shown in Table-3. The evaluation criteria are as follows. ◎: Water adhered in a thin film state and no water droplets were observed. …: Water is attached in a thin film state, but slightly large water droplets are observed. Δ: A state in which fine water droplets are partially adhered. X: A state in which fine water droplets are adhered to the entire surface.

[0045]

[Table 1]

[0046]

[Table 2]

[0047]

[Table 3]

[0048]

[Table 4]

[0049]

[Table 5]

[0050]

The antifogging composition of the present invention, when applied to a molded article, maintains the antifogging property over a long period of time and has excellent adhesion. The utility value is extremely large.

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) C09K 3/18 C09K 3/00 C08K 3/00 C08L 33/06 WPI / L (QUESTEL)

Claims (9)

(57) [Claims] 1. A water emulsion of an acrylic resin having (A) an ultraviolet absorbing group and / or a light stabilizing group, and
(B) An anti-fogging composition comprising two components of an inorganic colloid sol as a main component, and a blending amount of the component (B) of not less than 0.5 and not more than 4 based on the component (A) in terms of solid content weight ratio. 2. A method according to claim 1, wherein the component (A) is a monomer mixture comprising a UV-absorbing monomer and / or a light-stable monomer and a vinyl monomer copolymerizable therewith in an aqueous medium. The antifogging composition according to claim 1, which is an aqueous emulsion obtained by emulsion polymerization. 3. The component (A) according to claim 1, wherein the proportion of the UV-absorbing monomer and / or the light-stable monomer in the acrylic resin is 0.1 to 20% by weight. The antifogging composition as described in the above. 4. The antifogging composition according to claim 1, wherein the component (B) is a silica sol or an alumina sol. 5. The component (B) has an average particle diameter of 5 to 100 μm.
The antifogging composition according to any one of claims 1 to 4, which is: 6. An anti-fogging composition comprising the anti-fogging composition according to any one of claims 1 to 5, further comprising a crosslinking agent as component (A). 7. An ultraviolet-absorbing monomer used for the component (A)
The body or / and the photostable monomer is a polymerizable 2-hydro
Xybenzophenone derivative, polymerizable 2-hydroxyben
Zotriazole derivative and polymerizable hindered amine
At least one monomer selected from derivatives
Item 7. The antifogging composition according to any one of Items 1 to 6. 8. The ultraviolet absorbing monomer used in the component (A) is at least one ultraviolet absorbing monomer selected from the general formula (I) and / or the general formula (II). Item 7. The anti-fogging composition according to any one of items 7 . Embedded image R ¹ : hydrogen, an alkyl group or oxyalkyl group having 1 to 6 carbon atoms R ² : an alkylene group or oxyalkylene group having 1 to 10 carbon atoms or not present (in this case, X is directly bonded to a benzene ring) X: Ester bond, amide bond, ether bond or urethane bond R ³ : hydrogen or lower alkyl group R ⁴ : hydrogen, halogen or methyl group R ⁵ : hydrogen, hydrocarbon group having 1 to ⁶ carbon atoms R ⁶ : alkylene group or oxyalkylene group having 1 to 10 carbon atoms or no (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 a hydroxyl group in the side chain, or does not exist (in this case, X Is directly bonded to the benzene ring) R ⁸ : hydrogen or lower alkyl group 9. The light-stable monomer used in the component (A) is at least one light-stable monomer selected from the general formula (III). The antifogging composition as described in the above. Embedded image R ¹ : hydrogen or methyl group R ² : hydrogen or methyl group R ³ : hydrogen or alkyl group having 1 to 4 carbon atoms