USA As Represented by Secretary of the Navy

William B Mercer

Timothy L Dapp

Alexander Lebovits

Nathan F Cardarelli

Richard L Henry

William L Yeager

William L Yaeger

This invention relates to polymeric materials formable by casting at room mperature and having antifouling material incorporated therein. It is the reaction product of a) with polyether polyols and methylene bis (4-cyclohexyl) isocyanate, where a) is a polymer composition which is the reaction product of the distilled tributyltin oxide with a copolymer of either methyl methacrylate or methyl acrylate and, with either methacrylic acid or acrylic acid in such proportion that four (4) percent of the carbonyl groups remain unreacted.

Anti-fouling castable polymers and anti-fouling polyurethanes and

An apparatus and method for the elimination of marine fouling of marine mechanisms such as underwater fluid distribution emission systems. A grommet nozzle made of plastic materials containing an antifoulant and having a capability of easy installation forms a basic part of the apparatus. The grommet nozzle of the invention is formed of a polymer or a mixture of polymers containing a material toxic to calcareous marine organisms and capable of release of the toxic material into the environment at such a rate that the marine organisms grow extremely slow, yet the release rate is not sufficiently fast to be a toxic hazard to the surrounding environment.

Toxin containing perforated antifouling polymer nozzle grommet

This invention relates to polymeric materials formable by casting at room mperature and having antifouling materials incorporated therein. It is the reaction product of (a) with polyether polyols and methylene bis(4-cyclohexyl) isocyanate, where (a) is a polymeric composition which is the reaction product of a distilled tri-butyltin oxide with a copolymer of either methyl methacrylate of methyl acrylate and, with methacrylic acid or acrylic acid in such proportions that 4% of the carbonyl groups remain unreacted.

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Annapolis, MD, United States of America

William B Mercer