Method for the production of partially fluorinated fluoropolymers

US6346587B1 · kind B1 · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Ralf Kruger · Bensberg, DE
• Gerhard Heilig · Bensberg, DE
• Claus-Dieter Sommerfeld · Pittsburgh, US

Key dates

• Filing date: Sep 18, 2000
• Grant date: Feb 12, 2002
• Expiry date: Sep 18, 2020

Classification

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

Abstract

The present invention relates to a process for the production of partially fluorinated fluoropolymers, in accordance with which fluoromonomers are free-radically polymerized in the presence of polyfluoropropanes or polyfluorobutanes of the formulae CF3—CH2—CF2H, CF3—CHF—CF2—H, CF3—CH2—CF3, CHF2—CF2—CH2F, CF3—CH2—CF2—CH3 AND CF3—CHF—CF2—CH3 and optionally a chain-transfer agent.