Organotin-fumed silica derivatives for use as biocidal compositions
AssigneeThe Dow Chemical Company
InventorEdward R. Falardeau
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Abstract
A biocidal composition is formed from an organotin compound covalently bonded to reactive silanol sites present on the surface of a silica compound to form a solid biocidal particle. Further, the solid biocidal particle can be admixed with a carrier or film-forming vehicle. A method of protecting a surface from fouling organisms is also provided by coating the surface with the subject biocidal composition while it is dispersed in a carrier or film-forming vehicle.
Claims11
A biocidal composition comprising an organotin compound characterized by the structural formula R.sub.3 SnX wherein R is an alkyl or aryl functionality and X is an anionic radical;
- and said organotin compound is covalently bonded to reactive silanol sites present on the surface of a silica compound to form a solid biocidal particle wherein the maximum mmol of said organotin compound is no more than the mmol of said silanol sites present on said silica surface.
A method of protecting a surface from fouling organisms which comprises admixing in a carrier or film-forming vehicle a solid biocidal particle to form an admixture wherein said solid biocidal particle comprises an organotin compound characterized by the structural formula R3SnX wherein R is an alkyl or aryl functionality and X is an anionic radical;
- and said organotin compound is covalently bonded to reactive silanol sites present on the surface of a silica compound wherein the maximum mmol of said organotin compound is no more than the mmol of said silanol sites present on said silica surface, and treating said surface with said admixture.
Dependencies are inferred from the claim text.