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US 7,417,099 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.
Claims13
A polymeric. surfactant comprising:
- at least one unit of the formula
- wherein
- represents a bond in a polymerizable or polymer chain;
- Rf is —C4F9;
- R and R2 are each independently hydrogen or alkyl of 1 to 4 carbon atoms;
- n is an integer from 2 to 10;
- and
- x is an integer of at least 1;
- and
- a polyalkyleneoxy segment.
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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 one straight or branched alkyleneoxy group having 2 to 6 carbon atoms, more than one straight or branched alkyleneoxy groups linked together, each straight or branched alkyleneoxy group having 2 to 6 carbon atoms, or a straight or branched alkylene group having 12 to 20 carbon atoms;
- n is an integer from 2 to 10;
- and
- x, y and z are integers of at least 1.
4 more elements
Dependencies are inferred from the claim text.