Fluoromonomer polymerization

US6399729B1 · kind B1 · utility

Assignee

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

Inventors

• William B. Farnham · Hockessin, US
• Andrew Edward Feiring · Wilmington, US
• Patrick Edward Lindner · Parkersburg, US

Key dates

• Filing date: Nov 29, 1999
• Grant date: Jun 4, 2002
• Expiry date: Nov 29, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F14/18
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Chain transfer agents that are chlorine-free and liquid under polymerization conditions, useful for fluoromonomer polymerization, have the following formula:R1—O—R2.They are superior to common chain transfer agents such as chloroform in being safer and environmentally benign. They are also superior to gaseous chain transfer agents such as ethane because they do not enter the fluoromonomer gas recycle streams and so do not complicate the analysis and purification of those streams.