PROBLEM TO BE SOLVED: To provide an antifouling coating material composition capable of forming a coating film having an excellent crack resistance and release resistance under dried conditions.SOLUTION: The antifouling coating material composition includes a coating film-forming copolymer having 20 to 65% by weight component unit derived from a trialkylsilyl ester of polymerizable unsaturated carboxylic acid and having 1,000 to 50,000 number-average molecular weight and zinc oxide in an amount of 1 to 1,000 parts by weight based on 100 parts by weight of coating film-forming copolymer. The coating film is formed of the antifouling coating material composition. The antifouling method comprises using the antifouling coating material composition. The ship body or underwater structure is coated with the coating film.COPYRIGHT: (C)2007,JPO&INPIT【課題】乾燥条件下での耐クラック性、耐剥離性に優れた塗膜を形成可能な防汚塗料組成物の提供。【解決手段】重合性不飽和カルボン酸のトリアルキルシリルエステルから誘導される成分単位を20~65重量%の量で有し数平均分子量が1000~50000の被膜形成性共重合体と、酸化亜鉛とを含んでなり、酸化亜鉛が該被膜形成性共重合体100重量部に対して1~1000重量部の量で含有されていることを特徴とする防汚塗料組成物、およびこの防汚塗料組成物から形成されている塗膜および該防汚塗料組成物を用いた防汚方法並びに該塗膜で被覆された船体または水中構造物。【選択図】なし
