Process for producing PTFE and articles thereof

US11072671B2 · kind B2 · utility

Assignee

• 3M INNOVATIVE PROPERTIES COMPANY · US

Inventors

• Oliver Frey · Gauting, DE
• Klaus Hintzer · Woodbury, US
• Wolfgang Neumann · Gernrode, DE
• André Streiter · Mühldorf a. Inn, DE

Key dates

• Filing date: Apr 28, 2011
• Grant date: Jul 27, 2021
• Expiry date: Sep 19, 2031

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/2982
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Described herein is a process for making PTFE having a standard specific gravity of less than 2.160 g/cm3 comprising: polymerizing a tetrafluoroethylene monomer in an aqueous medium comprising an emulsifier and an initiator in a reaction vessel and contacting the aqueous medium with a fluorinated polyether. Also described herein are the polymerizable compositions and articles thereof.