Ultra-clean fluoropolymers

US6933357B2 · kind B2 · utility

Assignee

• 3M INNOVATIVE PROPERTIES COMPANY · US

Inventors

• Werner M. A. Grootaert · Windom, US
• Georg Burkard · Tönning, DE
• William D. Coggio · Hudson, US
• Klaus Hintzer · Woodbury, US
• Bernhard Hirsch · Altötting, DE
• Robert E. Kolb · Afton, US
• Albert Killich · Altötting, DE
• Gernot Loehr · Altötting, DE

Key dates

• Filing date: Feb 24, 2004
• Grant date: Aug 23, 2005
• Expiry date: Feb 24, 2024

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2205/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

High purity fluoropolymers are obtained by the emulsion polymerization process, removing essentially all ions and coagulating the polymer essentially without adding ions. These polymers are useful in the field of electronic devices.