Fully aromatic thermotropic polyesters

US4751128A · kind A · utility

Assignee

• BASF SE

Inventors

• Michael Portugall · Monsheim, DE
• Bernd Hisgen · Schifferstadt, DE
• Hans-Jakob Kock · Ludwigshafen, DE
• Erhard Seiler · Ludwigshafen, DE
• Gerd Blinne · Worms, DE

Key dates

• Filing date: Jul 31, 1987
• Grant date: Jun 14, 1988
• Expiry date: Jul 31, 2007

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K19/3809
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Fully aromatic themotropic polyesters are based on PA0 (A) from 30 to 60 mol % of 4-hydroxybenzoic acid, PA0 (B) from 20 to 35 mol % of a mixture of PA1 (B.sub.1) terephthalic acid and PA1 (B.sub.2) isophthalic acid, PA0 the molar ratio of B.sub.1 to B.sub.2 being from 1.04:1 to 19:1, and PA0 (C) from 20 to 35 mol % of a mixture of PA1 (C.sub.1) hydroquinone, PA1 (C.sub.2) 4,4'-dihydroxydiphenyl and PA1 (C.sub.3) from 0 to 5 mol % of a dihydroxy compound of the general formula I ##STR1## where R and R' are each C.sub.1 -C.sub.4 -alkyl, halogen or aryl, n is 1, 2 or 3 and m is 0 or 1, PA0 the molar ratio of C.sub.1 to C.sub.2 being from 0.1:1 to 2.67:1 and the molar ratio of B to C being from 0.9:1 to 1.1:1.