Tetrafluoroethylene and perfluorinated allyl ether copolymers

US11028198B2 · kind B2 · utility

Assignee

• 3M INNOVATIVE PROPERTIES COMPANY · US

Inventors

• Harald Kaspar · Altötting, DE
• Klaus Hintzer · Woodbury, US
• Markus E. Hirschberg · Mühldorf, DE
• Herbert Koenigsmann · Altötting, DE
• Karl D. Weilandt · Minneapolis, US
• Tilman C. Zipplies · Burghausen, DE

Key dates

• Filing date: Aug 1, 2017
• Grant date: Jun 8, 2021
• Expiry date: Oct 18, 2037

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2203/18
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A copolymer having tetrafluoroethylene units and second polymerized monomer units in a range from 0.2 to 1 percent by weight, based on the total weight 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, n is independently from 1 to 6, and z is 0, 1, or 2. The copolymer has a melt flow index in a range from 0.02 grams per 10 minutes to 19.4 grams per 10 minutes. The copolymer can be extruded to make articles, such as insulated cables. A method of making the copolymer is also disclosed.