Non-toxic antifouling coating composition

Claim 1

A non-toxic antifouling coating composition comprising: 50 to 99 percent by weight as the resin solid content of (A) a reaction-curable silicone resin composition containing, as a major component, an organopolysiloxane having siloxane bonds and having such a structure that an organic group and a curably reactive functional group selected from a group consisting of a hydroxyl group and an alkoxy group, are bonded directly to a Si atom at the molecular terminal, and 1 to 50 percent by weight as the solid content of (B) a silicone resin having an average molecular weight of 250 to 30,000, a viscosity of 20 to 50,000 centistokes and a polysiloxane bond as a hydrophobic group, and represented by the general formula (I): ##EQU4## wherein R is a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, an aryl group or an aralkyl group, R 1 is a bivalent aliphatic hydrocarbon group having 1 to 10 carbon atoms and containing a group having a hydrophilic group selected from a group consisting of an ether group, an ester group and --NH--group, R 2 is a lower alkyl group having 1 to 6 carbon atoms, X and Y are represented, respectively, as 0.01≦X+Y<4, 0.01≦Y<4.0 and 0.02≦X+Y<4, said bivalent aliphatic hydrocarbon group being linked between Si and OR 2 as the alkoxy group at the molecular terminal.