Patent · US Active

Aqueous emulsion polymerization of fluorinated monomers using a fluorinated surfactant

US7776946B2 · kind B2 · utility

8Cited by

154References

13Claims

0Family size

Assignee

3M INNOVATIVE PROPERTIES COMPANY · US

Inventors

Klaus Hintzer · Woodbury, US
Harald Kaspar · Altötting, DE
Andreas Maurer · Zürich, CH
Werner Schwertfeger · Altötting, DE
Tilman C. Zipplies · Burghausen, DE

Key dates

Filing date	Jul 14, 2006
Grant date	Aug 17, 2010
Priority date	—
Expiry date	Jul 11, 2027

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08F14/18
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The present invention provides an aqueous emulsion polymerization of fluorinated monomers including gaseous fluorinated monomers using a perfluoro ether surfactant as an emulsifier. The perfluoro ether surfactants correspond to formula (I)Rf—O—CF2CF2—X (I)wherein Rf represents a linear or branched perfluoroalkyl group having 1, 2, 3 or 4 carbon atoms and X represents a carboxylic acid group or salt thereof. In a further aspect, the invention also provides an aqueous fluoropolymer dispersion comprising the perfluoro ether surfactant and the use of such dispersion in the coating or impregnation of substrates.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.