Tetrafluoroethylene copolymers having sulfonyl groups

US10676555B2 · kind B2 · utility

Assignee

• 3M INNOVATIVE PROPERTIES COMPANY · US

Inventors

• Denis Duchesne · Woodbury, US
• Klaus Hintzer · Woodbury, US
• Harald Kaspar · Altötting, DE
• Kai H. Lochhaas · Neuötting, DE
• Jens Schrooten · Mühldorf a. Inn, DE
• Tilman C. Zipplies · Burghausen, DE

Key dates

• Filing date: Feb 12, 2016
• Grant date: Jun 9, 2020
• Expiry date: Feb 12, 2036

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2327/18
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A copolymer having tetrafluoroethylene units and units independently represented by formula (I) in a range from 0.02 to 2 mole percent, based on the total amount of the copolymer. Rf is a linear or branched perfluoroalkyl group having from 1 to 8 carbon atoms and optionally interrupted by one or more —O— groups, each n is independently from 1 to 6, m is 0 or 1, and z is 0, 1, or 2. The copolymer has a melt flow index in a range from 20 grams per 10 minutes to 40 grams per 10 minutes and has in a range from 2 to 200 —SO2X groups per 106 carbon atoms and up to 100 unstable end groups per 106 carbon atoms. The copolymer can be extruded to make articles, such as insulated cables. A method of making the copolymer is also disclosed.