Preparation of a modified polytetrafluoroethylene and use thereof

US5530078A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Bernd Felix · Altötting, DE
• Klaus Hintzer · Woodbury, US
• Gernot Lohr · Altötting, DE

Key dates

• Filing date: Oct 18, 1994
• Grant date: Jun 25, 1996
• Expiry date: Oct 18, 2014

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F214/262
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Polymerizing tetrafluoroethylene with modifying amounts of a perfluoro(alkyl vinyl ether) at temperatures below 60.degree. C. using permanganate or similar initiators by the suspension process and milling the raw polymer to an average particle size of from 10 to 50 .mu.m gives molding powders which are suitable for the preform free-sintering technique.