ANTIFOULING COATING COMPOSITION AND USES OF THE SAME

There is provided an antifouling coating composition capable of forming an antifouling coating film which has stable coating film consumption degree on ships, underwater structures and the like and which exhibits excellent antifouling property over a long term. The antifouling coating composition includes a hydrolyzable copolymer (A) and an antifouling agent (B), wherein the hydrolyzable copolymer (A) is, e.g., a metal salt bond-containing copolymer having a component unit derived from a monomer (a21) represented by the general formula (II): CH2-C(R2)-COO-M-O-CO-C(R2)-CH2 (II). In the formula (II), M is zinc or copper, and R2 is a hydrogen atom or a methyl group], and a component unit derived from other unsaturated monomer (a22) copolymerizable with the monomer (a21), and wherein the antifouling agent (B) includes at least medetomidine. 本发明提供可形成对于船舶或水中结构物等具有稳定的涂膜消耗度且长期发挥良好的防污性的防污涂膜的防污涂料组合物。所述防污涂料组合物包含水解性共聚物(A)和防污剂(B)，其特征在于，所述水解性共聚物(A)是具有由以通式(Ⅱ):CH＝C(R)-COO-M-O-CO-C(R)＝CH...(Ⅱ)表示的单体(a21)衍生的成分单元和由可与所述单体(a21)共聚的