Process for the production of aromatic polyether ketones

US5053477A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Sabine Kern · Moers, DE
• Joachim Genz · Krefeld, DE
• Frank Kleiner · Cologne, DE
• Volker Eckhardt · Walsrode, DE
• Karsten-Josef Idel · Krefeld, DE

Key dates

• Filing date: Feb 26, 1990
• Grant date: Oct 1, 1991
• Expiry date: Feb 26, 2010

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G65/4093
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for the production of high molecular weight crystalline aromatic polyether ketones from an aromatic dihydroxy compound and an aromatic dihalogeno compound which contains a keto group, characterized in that N-C1-C5 alkyl caprolactam solvents and a mixture of alkali metal compounds consisting of at least one alkali metal carbonate and at least one compound selected from alkali metal hydroxides, bicarbonates, fluorides, hydrides, alkoxides (e.g. methylates or ethylates) and alkylates (e.g. ethyls or butyls) are used.