Expandable functional TFE copolymer fine powder, expanded products and reacted products therefrom

US8853287B2 · kind B2 · utility

Assignee

• W.L. Gore & Associates GmbH · DE

Inventors

• Ping Xu · Osaka, JP
• Jack Hegenbarth · Wilmington, US
• Rachel Radspinner · Flagstaff, US
• Paul D. Drumheller · Flagstaff, US
• William Johnson · Newark, US
• Wen K. Liu · Newark, US
• Xin Chen · Shanghai, CN

Key dates

• Filing date: Mar 14, 2013
• Grant date: Oct 7, 2014
• Expiry date: Mar 14, 2033

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31544
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A functional TFE copolymer fine powder is described, wherein the TFE copolymer is a polymer of TFE and at least one functional comonomer, and wherein the TFE copolymer has functional groups that are pendant to the polymer chain. The functional TFE copolymer fine powder resin is paste extrudable and expandable. Methods for making the functional TFE copolymer are also described. The expanded functional TFE copolymer material may be post-reacted after expansion.