ANTIFOULING COATING MATERIAL COMPOSITION, ANTIFOULING COATING FILM, ANTIFOULING BASE, METHOD FOR PRODUCING ANTIFOULING BASE, AND METHOD FOR STORING ANTIFOULING COATING MATERIAL COMPOSITION
[Object] To provide an antifouling coating composition which contains a silyl ester (co) polymer and medetomidine and is used to prevent the fouling of substrates by aquatic organisms and which can form antifouling coating films exhibiting outstanding antifouling properties over a long period and also has good storage stability, and to provide use applications of the composition. [Solution] The antifouling coating composition includes a silyl ester (co)polymer (A) and medetomidine (B), the silyl ester (co)polymer (A) including structural units derived from a monomer (a) represented by the general formula (I): R 1 -CH=C(CH 3 )-COO-(SiR 2 R 3 O) n -SiR 4 R 5 R 6 , and structural units derived from an unsaturated monomer (b) copolymerizable with the monomer (a).