Nitto Kasei Co., Ltd.

Takayoshi Fujimoto

Hidenori Waku

Kiyomi Mori

Satoshi Minamino

Nobuyuki Hamaura

Tsuyoshi Iwamoto

Hiroshi Shimojitosho

Masayuki Oka

An object of the present invention is to provide a composition for forming an environment friendly antifouling coating film that is unlikely to cause a hairline crack and like coating film defects even when immersed in seawater for a long time, and that prevents or inhibits attachment of slime. An antifouling coating composition of the invention comprises: (A) a triorganosilyl ester-containing copolymer obtained by a mixture of (a) a triorganosilyl (meth)acrylate monomer represented by a general formula (1): Ris a hydrogen atom or a methyl, and R, R, and Rare equal or different each other, and each represent an alkyl group having 3 to 6 carbons and branched on &#x3b1;-position or a phenyl group, and (b) an ethylenically unsaturated monomer copolymerizable with the triorganosilyl (meth)acrylate monomer, (B) a modified rosin salt which is a salt of a modified rosin and zinc and/or copper, the modified rosin containing, in an amount of 80 weight % or more, two or more members selected from the group consisting of dihydroabietic acid, tetrahydroabietic acid, dehydroabietic acid, pimaric acid, isopimaric acid, and dihydropimaric acid.

Antifouling coating composition, antifouling coating film formed using the composition, coated article having the coating film on the surface, and antifouling treatment method to form the coating film

An object of the present invention is to provide a composition for forming an environment friendly antifouling coating film that can effectively exhibit an antifouling effect in seawater for a long period of time and furthermore exhibits a small temperature dependency of the coating film dissolving amount. The present invention provides an antifouling coating composition comprising: (A) a triorganosilyl ester-containing copolymer obtained by a mixture of (a) a triorganosilyl methacrylate monomer represented by a general formula (1) in which R, R, and Rare equal or different each other, and each represent an alkyl group having 3 to 6 carbons and branched on &#x3b1;-position or a phenyl group, and (b) a methoxyalkyl methacrylate monomer represented by a general formula (2) in which Rrepresents an alkylene group having 2 to 4 carbons, wherein a content ratio of the monomer (a) in the mixture is 45 to 65 weight %, and a total content of the monomer (a) and the monomer (b) in the mixture is 80 weight % or more, and a copper salt that is at least one member selected from the group consisting of rosin copper salts and copper salts of rosin derivatives.

Antifouling coating composition, antifouling coating film formed from the composition, coated object having the coating film on surface, and method of antifouling by forming the coating film

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Osaka, Japan

Takayoshi Fujimoto