Perfluorocarbon-polymeric coatings having low critical surface t

Details Perfluorocarbon-polymeric coatings having low critical surface t Perfluorocarbon-polymeric coatings having low critical surface t

1980-09-02

1982-08-17

Hoffman, James R.

Stock material or miscellaneous articles

Hollow or container type article

Cellular material derived from plant or animal source

427230, 427236, 526 62, 525150, B05D 722, B08B 1702, B32B 102

Patent

active

043449930

ABSTRACT:
Coatings having very low critical surface tensions comprise (1) a hydrophilic polymer such as polyacrylamide, (2) an ionic perfluorocarbon compound such as 3-[((heptadecafluorooctyl)sulfonyl)amino]-N,N,N-trimethyl-1-propanaminium iodide and (3) a cyclic sulfonium zwitterion cross-linking agent such as 2,2-bis(3-tetrahydrothiophenium-4-oxidophenyl)-propylidene. Such coatings are most advantageously employed as release coatings on internal surfaces of chemical reaction vessels in order to minimize the deposition (build-up) of undesirable materials on such internal surfaces.

REFERENCES:
patent: 3172910 (1965-03-01), Brace
patent: 3258423 (1966-06-01), Tuve et al.
patent: 3825434 (1974-07-01), Berens et al.
patent: 3849179 (1974-11-01), Morningstar
patent: 4001154 (1977-01-01), Schmidt
patent: 4007320 (1977-02-01), Petersen
patent: 4111914 (1978-09-01), Kresta et al.
Advances in Chemistry Series #43, "Contact Angle, Wettability and Adhesion", pp. 20-22 (1964).

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