| abstract |
[PROBLEMS] An antifouling coating composition containing a silyl ester (co) polymer and medetomidine and used for preventing the substrate from being soiled by aquatic organisms, and having excellent antifouling properties over a long period of time. The present invention provides an antifouling coating composition that can form an antifouling coating film that exhibits good properties and has good storage stability, and uses thereof. [Solution] comprising at least one component (C) selected from the group consisting of silyl ester (co) polymer (A), medetomidine (B), and dehydrating agent (c1) and rosins (c2), The silyl ester copolymer (A) is a monomer represented by the general formula (I): R 1 —CH═CH—COO— (SiR 2 R 3 O) n —SiR 4 R 5 R 6 An antifouling paint composition having a structural unit derived from |