Aqueous antifouling coating composition comprised of emulsified water-insoluble polymer and triphenyltin derivative

Claim 1

A stable antifouling coating composition comprising a. a liquid carrier wherein between 50 and 100% by weight of said carrier is water, the remainder being selected from water-miscible liquid organic compounds; b. between 8 and 40%, based on the weight of said composition, of an emulsified water-insoluble film-forming polymer selected from the group consisting of homopolymers of acrylic acid, methacrylic acid and esters of acrylic and methacrylic acids wherein the alcohol residue of said ester contains between 1 and 12 carbon atoms, and copolymers of said acids and esters; and c. between 5 and 50%, based on the weight of said coating composition, of triorganotin compound wherein the three hydrocarbon radicals bonded to the tin atom are selected from the group consisting of phenyl radicals and inertly substituted phenyl radicals and the remaining valence of the tin atom is satisfied by a radical selected from the group consisting of halogen, nitrate, hydroxyl, radicals derived from removal of the hydrogen atom from the carboxy radical of a carboxylic acid containing between 1 and 20 carbon atoms, oxygen, sulfur and sulfate; and d. between 0 and 40%, based on the weight of said composition, of a pigment; the total of (a), (b), (c) and (d) constituting between 90 and 99.89% by weight of said composition, 0.11 to 10% being selected from the group consisting of anti-microbial agents, wetting agents and surface tension depressants, with the proviso that non-volatile materials constitute between 30 and 75% by weight of said composition.