3m Innovative Properties Company

Herbert Königsmann

Klaus Hintzer

Tilman C Zipplies

Harald Kaspar

Andreas R Maurer

Michael Jürgens

Richard M Flynn

Werner Schwertfeger

Kai Helmut Lochhaas

The invention provides a fluorinated surfactant having the general formula:[R&#x2014;(O)&#x2014;CHF&#x2014;(CF)&#x2014;COO&#x2014;]X&#x2003;&#x2003;(I)wherein Rrepresents 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, Xrepresents 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.

Fluorinated surfactants for making fluoropolymers

The present invention provides a fluorinated surfactant having the general formula:[R&#x2014;(O)&#x2014;CQH&#x2014;CF&#x2014;O]&#x2014;R&#x2014;G&#x2003;&#x2003;(I)wherein Rrepresents a partially or fully fluorinated aliphatic group optionally interrupted with one or more oxygen atoms, Q is CFor 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.

Fluorinated surfactants for use in making a fluoropolymer

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Burgkirchen, Germany

Herbert Königsmann