Amorphous tetrafluoroethylene-hexafluoropropylene copolymers

US5637663A · kind A · utility

Assignee

• E.I. DU PONT DE NEMOURS AND COMPANY · US

Inventors

• Colin Anolick · Wilmington, US
• Viacheslav A. Petrov · Hockessin, US
• Bruce E. Smart · Wilmington, US
• Charles W. Stewart · Newark, US
• Robert Clayton Wheland · Wilmington, US
• William B. Farnham · Hockessin, US
• Andrew Edward Feiring · Wilmington, US
• Weiming Qiu · Wilmington, US

Key dates

• Filing date: Feb 5, 1996
• Grant date: Jun 10, 1997
• Expiry date: Feb 5, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2207/066
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Disclosed herein are novel amorphous tetrafluoroethylene-hexafluoropropylene (TFE-HFP) dipolymers, and other copolymers containing TFE, HFP and a third monomer, many of which are more random than previous amorphous TFE-HFP copolymers, as well as a novel high productivity continuous process for making these polymers. The polymers are particularly useful in the form of coatings, films and encapsulants.