High solid antifouling coating composition

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PROBLEM TO BE SOLVED : To provide a novel low solvent antifouling coating composition based on an epoxy functional prepolymer having a hydrolyzable silyl group.SOLUTION : A self polishing antifouling coating composition comprises (a) a base component comprising a prepolymer and (b) a curing agent having at least one active hydrogen, for example, one selected from an amine, an amine epoxy adduct and a poly mercaptan; wherein the prepolymer has at least one epoxy functional group and a side chain having a terminal represented by formula I : -C(=O)-O-(SiRRO)-SiRRR( n is 0-5, 000 and R, R, R, Rand Rare selected from 1-20C alkyl and optionally substituted phenyl groups ).