Process for the production of bifunctional OH-terminated polyphenylene oxides with dipolar aprotic solvent

US5021543A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Paul J. Mayska · Krefeld, DE
• Volker Eckhardt · Walsrode, DE
• Dieter Freitag · Krefeld, DE
• Karsten-Josef Idel · Krefeld, DE

Key dates

• Filing date: Dec 4, 1989
• Grant date: Jun 4, 1991
• Expiry date: Dec 4, 2009

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G65/38
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to a new process for the production of bifunctional polyphenylene oxides bearing OH groups as functional groups at both ends of the chain.