Patent ID: 7977407

Claim:
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 1 , R 2 , and R 3 are equal or different each other, and each represent an alkyl group having 3 to 6 carbons and branched on α-position or a phenyl group, and (b) a methoxyalkyl methacrylate monomer represented by a general formula (2): in which, R4 represents 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 (B) a copper salt that is at least one member selected from the group consisting of rosin copper salts and copper salts of rosin derivatives.