Peroxide curable fluoropolymers obtainable by polymerization using non-fluorinated polyhydroxy emulsifiers

US10087307B2 · kind B2 · utility

Assignee

• 3M INNOVATIVE PROPERTIES COMPANY · US

Inventors

• Kai H. Lochhaas · Neuötting, DE
• Klaus Hintzer · Woodbury, US
• Tilman C. Zipplies · Burghausen, DE
• Harald Kaspar · Altötting, DE
• Florian D. Jochum · Neuötting, DE
• Helmut Traunspurger · Julbach, DE
• Arnd Kruz · Neuss, DE
• Peter Bissinger · Dießen, DE

Key dates

• Filing date: Oct 29, 2014
• Grant date: Oct 2, 2018
• Expiry date: Nov 17, 2034

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K2003/3054
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Described are methods of making a curable fluoropolymer having repeating units derived from vinylidenfluoride (VDF) and at least one perfluorinated monomer selected from hexafluoropropene (HFP), tetrafluoroethene (TFE), a perfluorovinyl ether (PAVE), a perfluoroallylether (PAAVE) or a combination thereof. The method includes polymerizing the monomers in an aqueous medium in a radical reaction containing one or more reaction initiators, one or more chain transfer agent containing one or more halogens selected from iodine, bromine or a combination thereof and one or more non-fluorinated aliphatic polyhydroxy emulsifiers. The polymerization is carried out without adding a fluorinated emulsifier. Also provided are curable fluoropolymers obtainable by such methods and cured fluoropolymers obtainable by curing the curable fluoropolymers, and their applications.