Fluorochemical sulfonamide surfactants
Assignee3M Innovative Properties Company
InventorsPatricia M. Savu, Sandra A. Etienne
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Abstract
Described are fluorochemical surfactants derived from nonafluorobutanesulfonyl fluoride that contain polyalkyleneoxy side chains and may be copolymerized with acrylic acid or methacrylic acid to form polyacrylates or polymethacrylates. The surfactants surprisingly lower the surface tension of water and other liquids in the same or similar low values achieved by premier surfactants such as those derived from perfluorooctane sulfonyl fluoride.
Claims23
A method comprising combining a liquid and a polymeric surfactant to reduce the surface tension of said liquid, the polymeric surfactant comprising repeating units comprising a perfluorobutanesulfonamide group.
A method comprising surface treating glass or ceramic beads with a polymeric compound comprising repeating units comprising a perfluorobutanesulfonamide group.
A method comprising:
- (a) providing water or an aqueous dispersion or solution;
- (b) adding a surfactant comprising a perfluorobutanesulfonamide segment to said water or aqueous dispersion or solution;
- and
- (c) mixing said water or aqueous dispersion or solution and said surfactant with a gas to form a stable foam.
Dependencies are inferred from the claim text.