Fluorinated surfactants for use in making a fluoropolymer

US7659333B2 · kind B2 · utility

Assignee

• 3M INNOVATIVE PROPERTIES COMPANY · US

Inventors

• Klaus Hintzer · Woodbury, US
• Michael Jürgens · Rheydt, DE
• Harald Kaspar · Altötting, DE
• Herbert Königsmann · Klein-Winternheim, DE
• Kai H. Lochhaas · Neuötting, DE
• Andreas Maurer · Zürich, CH
• Tilman C. Zipplies · Burghausen, DE
• Richard M. Flynn · Mahtomedi, US

Key dates

• Filing date: Nov 21, 2006
• Grant date: Feb 9, 2010
• Expiry date: Nov 21, 2026

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L71/02
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The present invention provides a fluorinated surfactant having the general formula:[Rf—(O)t—CQH—CF2—O]n—R—G  (I)wherein Rf represents a partially or fully fluorinated aliphatic group optionally interrupted with one or more oxygen atoms, Q is CF3 or F, R is an aliphatic or aromatic hydrocarbon group, G represents a carboxylic or sulphonic acid or salt thereof, t is 0 or 1 and n is 1, 2 or 3. The surfactant is particularly useful in polymerizing fluorinated monomers in an aqueous emulsion polymerization.