Compositions for protecting civil infrastructure
AssigneesNorth Carolina State University, The University of North Carolina at Chapel Hill
InventorsRuben G. Carbonell, Joseph M. DeSimone, Florence E. Henon
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Abstract
A method of protecting a civil infrastructure substrate from the damaging effects of pollution, noxious fumes, weather, and the like. The method comprises (a) providing a composition comprising carbon dioxide and a fluorocarbon such as a fluoropolyether (preferably a perfluoropolyether) or a fluorocarbon elastomer, optionally having at least one anchoring group such as an amide covalently joined thereto, and then (b) applying that composition to the civil infrastructure substrate to form a protective coating thereon. The applying step is preferably carried out by spraying. Compositions useful for carrying out the process of the invention are also disclosed.
Claims21
A civil infrastructure protectant composition, said composition comprising;
- a solvent consisting essentially of carbon dioxide and between about 0.1 and 20 percent of a fluoropolyether, said fluoropolyether having at least one anchoring group covalently joined thereto;
- wherein said carbon dioxide is a liquid or supercritical fluid.
A civil infrastructure protectant composition, comprising:
- a solvent consisting essentially of carbon dioxide;
- and
- between about 0.1 and 40 percent of a fluoropolyether, said fluoropolyether having at least one anchoring group covalently joined thereto;
- wherein said carbon dioxide is a liquid or supercritical fluid.
A civil infrastructure protectant composition, said composition comprising:
- a solvent consisting essentially of carbon dioxide;
- and
- between about 0.1 and 80 percent of a fluoropolyether, said fluoropolyether having at least one anchoring group covalently joined thereto wherein said carbon dioxide is a liquid or supercritical fluid.
Dependencies are inferred from the claim text.