Process for improving the color quality of polyphenylene oxide with unsaturated carboxylic acid ester

US4814431A · kind A · utility

Assignee

• Huls Aktiengesellschaft · DE

Inventors

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

Key dates

• Filing date: Jul 31, 1987
• Grant date: Mar 21, 1989
• Expiry date: Jul 31, 2007

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K5/11
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for improving the color quality of PPE or molding compounds containing PPE, comprising adding an .alpha.,.beta.-unsaturated ester of the formula: ##STR1## to the organic PPE solution prior to heating it to temperatures above 150.degree. C. R.sub.a and R.sub.b are independently H, CH.sub.3, COOR.sub.c, or Ph, and R.sub.c is a C.sub.1-10 alkyl group.