Antifouling Effectiveness of Copolymers for Ship Hull Protection.

摘要

Novel triorganotin methacrylates and methylmethacrylate were copolymerized for use as marine antifouling coatings. The triorganotin compounds consisted of three four-carbon chains with double bonds at C-1 or C-3 in one or more of the chains. The physical properties of these four polymers vary with the number of unsaturated chains and the position of the double bond in the organotin compound. The copolymers containing triorganotin compounds with the double bond at C-3 in one or two of the carbon chains or with the double bond at C-1 in one of the carbon chains have potential as antifouling coatings. These coatings were subjected to release rate studies, static and dynamic testing, and field exposure tests for antifouling effectiveness for 6 months. Those coatings containing organotins with double bonds at C-3 in one or two of the chains show excellent antifouling properties when tin-bearing monomer is above 25% by weight. Indications are that degradation to minimally toxic species by loss of one or more of the chains containing double bonds occurs simultaneously with hydrolysis from the coating backbone.... Marine antifouling coatings.