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US 6,664,354 B2Granted
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.
Claims11
A polymeric surfactant of the formula
- wherein represents a bond in a polymerizable or polymer chain;
- R, R1 and R2 are each independently hydrogen or alkyl of 1 to 4 carbon atoms;
- R3 is a group of the formula
- (PO)q—(EO)p—(PO)q or (EO)p—(PO)q—(EO)p
- wherein
- is an integer of 1 to about 128 and q is an integer of 0 to about 54;
- n is an integer from 2 to 10;
- and
- x, y and z are integers of at least 1.
6 more elements
A polymeric surfactant comprising the reaction product of:
- (a) a compound of the formula
- (b) a compound selected from the group consisting of
- mixtures thereof,
- wherein R, R1 and R2 are each independently hydrogen or alkyl of 1 to 4 carbon atoms;
- n is an integer from 2 to 10;
- p is an integer of 1 to about 128;
- and
- q is an integer of 0 to about 55.
5 more elements
Dependencies are inferred from the claim text.