Method of producing high-molecular weight polyphenylene oxides

US4440923A · kind A · utility

Assignee

• Chemische Werke Huels Aktiengesellschaft · US

Inventors

• Martin Bartmann · Recklinghausen, DE
• Hanns-Jorg Bax · Marl, DE
• Klaus Burzin · Marl, DE
• Wilfried Ribbing · Dorsten, DE

Key dates

• Filing date: May 23, 1983
• Grant date: Apr 3, 1984
• Expiry date: May 23, 2003

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G65/44
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A method for producing high molecular-weight polyphenylene oxides which comprises the oxidative coupling of a diortho-substituted phenol in the presence of a copper-amine complex, and an activator of a polyvalent alcohol, an alkali or alkaline earth hydroxide, and, if necessary, the hydrobromide of a secondary amine.