Process for the production of polyphenylene ethers with reduced inherent color

US4868283A · kind A · utility

Assignee

• Huls Aktiengesellschaft · DE

Inventors

• Martin Bartmann · Recklinghausen, DE
• Wilfried Ribbing · Dorsten, DE

Key dates

• Filing date: May 29, 1987
• Grant date: Sep 19, 1989
• Expiry date: May 29, 2007

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G65/46
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for the production of polyphenylene ethers with reduced inherent color by the addition of a boron compound after the termination of the oxidative coupling reaction and removal of the metallic catalyst residues.