ANTIFOULING COATING COMPOUND

PURPOSE:An antifouling coating compound having a low content of organotin salt and effectively antifouling action, comprising an acrylic copolymer containing a specific amount of a triorganotin salt unit of an olefinic unsaturated carboxylic acid and a specific hydrophilic hydrolysis promoter. CONSTITUTION:An acrylic copolymer containing 30-55wt% one or more triorganotin salts of olefinic unsaturated carboxylic acids is blended with preferably 5-200wt% based on the acrylic copolymer of a hydrophilic hydrolysis promoter {preferably compound shown by the formula II [R1 is H, or lower alkyl; R2 is (alkoxy)alkyl, or aryl(oxyalkyl); m1 and m2 are >=1]} shown by the formula I (R is polyhydric alcohol organic residue; n is number of hydroxyl groups of the organic group and >=2; R1, R2, R3, and R4 are H, or hydrocarbon residue; m is >=2), to give the aimed antifouling coating compound. EFFECT:A film of coating has proper solubility in sea water, and improved long-period antifouling performance. USE:Ships and underwater structures.