Low leaching antifouling organometallic polyesters
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorsEdward J. Dyckman, Jean A. Montemarano, Eugene C. Fischer
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Abstract
Marine structures which are designed to be submerged in an aqueous environt containing fouling organism are protected fro fouling by the use of an organotin containing polymer wherein the tin is chemically bonded to the polymer. The polymer inhibits fouling of the exposed surface of the structure while minimizing the adverse effects on the surrounding environment due to reduced leaching of the organotin compound from the polymer.
Claims17
A composition of matter for preventing the growth of fouling organisms on a marine structure, said composition being characterized by a low leaching rate of the antifouling agent from the composition and comprising an organotin containing polymer, said polymer being the reaction product of an unsaturated alkyd resin and an unsaturated compound capable of cross-linking said resin and having as a substituent a carboxylic acid group which has bonded thereto an organotin compound selected from the group consisting of tin oxides and tin hydroxides of the formula:
- ##STR5## wherein R.sub.1, R.sub.2 and R.sub.3 may be the same or different and are selected from the group consisting of propyl, butyl, phenyl, and benzyl, and wherein said bonding results from the reaction of said carboxylic acid group with said organotin compound.
A method for preventing the growth of fouling organisms on a marine structure which comprises forming said structure from an organotin containing polymer, said polymer being the reaction product of an unsaturated alkyd resin and an unsaturated compound capable of cross-linking said resin and having as a substituent a carboxylic acid group which has bonded thereto an organotin compound selected from the group consisting of tin oxides and tin hydroxides of the formula:
- ##STR6## wherein R.sub.1, R.sub.2, and R.sub.3 may be the same or different and are selected from the group consisting of propyl, butyl, phenyl, and benzyl, and wherein said bonding results from the reaction of said carboxylic group with said organotin compound.
A method for preventing the growth of fouling organisms on a marine structure which comprises applying to said structure a coating of an organotin containing polymer, said polymer being the reaction product of an unsaturated alkyd resin and an unsaturated compound capable of cross-linking said resin and having as a substituent a carboxylic acid group which has bonded thereto an organotin compound selected from the group consisting of tin oxides and tin hydroxides of the formula:
- ##STR7## wherein R.sub.1, R.sub.2, and R.sub.3 may be the same or different and are selected from the group consisting of propyl, butyl, phenyl, and benzyl, and wherein said bonding results from the reaction of said carboxylic acid group with said organotin compound.
A method for preventing the growth of fouling organisms on a marine structure which comprises impregnating said structure with an organotin containing polymer, said polymer being the reaction product of an unsaturated alkyd resin and an unsaturated compound capable of cross-linking said resin and having as a substituent a carboxylic acid group which has bonded thereto an organotin compound selected from the group consisting of tin oxides and tin hydroxides of the formula:
- ##STR8## wherein R.sub.1, R.sub.2, and R.sub.3 may be the same or different and are selected from the group consisting of propyl, butyl, phenyl, and benzyl, and wherein said bonding results from the reaction of said carboxylic acid group with said organotin compound.
Dependencies are inferred from the claim text.