Fluoropolymer compositions and purification methods thereof

US9453086B2 · kind B2 · utility

Assignee

• 3M INNOVATIVE PROPERTIES COMPANY · US

Inventors

• Klaus Hintzer · Woodbury, US
• Michael Juergens · Rheydt, DE
• Gunther J. Kaempf · Altötting, DE
• Harald Kaspar · Altötting, DE
• Kai H. Lochhaas · Neuötting, DE
• André Streiter · Mühldorf a. Inn, DE
• Oleg Shyshkov · Burgkirchen an der Alz, DE
• Tilman C. Zipplies · Burghausen, DE
• Herbert Koenigsmann · Altötting, DE

Key dates

• Filing date: Dec 21, 2011
• Grant date: Sep 27, 2016
• Expiry date: Jun 22, 2032

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/582
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Described herein is a composition comprising an aqueous polymerization reaction product of fluorinated monomers and wherein the polymerization is initiated (i) in the absence of a fluorinated emulsifier and whereby no fluorinated emulsifier is added during polymerization or (ii) in the presence of an fluorinated emulsifier selected from: [Rf—O-L-COO-]i Xi+ (I) wherein L represents a linear or branched, non-fluorinated, partially fluorinated, or fully fluorinated alkylene group, Rf represents a linear or branched partially or fully fluorinated aliphatic group or a linear or branched partially or fully fluorinated aliphatic group interrupted with at least one oxygen atom, Xi+ represents a cation having the valence i and i is 1, 2 or 3; wherein the reaction product and/or the resulting aqueous phase are substantially free of di- and tri-alkylamines and substantially free of low molecular weight fluoroorganic compounds and methods thereof.