Fluorinated surfactants for making fluoropolymers

US7838608B2 · 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
• Andreas Maurer · Zürich, CH
• Werner Schwertfeger · Altötting, DE
• Tilman C. Zipplies · Burghausen, DE

Key dates

• Filing date: Dec 19, 2006
• Grant date: Nov 23, 2010
• Expiry date: Dec 19, 2026

Classification

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

Abstract

The invention provides a fluorinated surfactant having the general formula:[Rf—(O)t—CHF—(CF2)n—COO—]iXi+  (I)wherein Rf represents a partially or fully fluorinated aliphatic group optionally interrupted with one or more oxygen atoms, t is 0 or 1 and n is 0 or 1, Xi+ represents a cation having a valence i and i is 1, 2 or 3. The surfactant can be used in emulsion polymerization of fluoromonomers to prepare fluoropolymers.