Ultra-clean fluoropolymers

US6720360B1 · kind B1 · 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 1, 2000
• Grant date: Apr 13, 2004
• Expiry date: Feb 1, 2020

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.