Fully aromatic thermotropic polyester imide

US4801676A · kind A · utility

Assignee

• BASF SE

Inventors

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

Key dates

• Filing date: Jul 28, 1987
• Grant date: Jan 31, 1989
• Expiry date: Jul 28, 2007

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G63/688
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Fully aromatic thermotropic polyesters based on PA1 (A) from 30 to 60 mol % of 4-hydroxybenzoic acid, PA1 (B) from 20 to 35 mol % of a mixture of PA2 (B.sub.1) terephthalic acid, PA2 (B.sub.2) isophthalic acid and PA2 (B.sub.3) from 0.5 to 5 mol % of a dicarboxylic acid of the general formula I ##STR1## where X is --O--, --S--, --SO.sub.2 --, --CO--, --CH.sub.2 -- or --C(CH.sub.3).sub.2 --, n is 0 or 1 and the two imide nitrogen atoms are meta or para to X, or their C.sub.1 -C.sub.8 -alkyl, C.sub.1 -C.sub.8 -alkoxy, aryl, chlorine or bromine derivatives which are substituted in the nucleus, the molar ratio of B.sub.1 to B.sub.2 being from 1.04:1 to 19:1, and PA1 (C) from 20 to 35 mol % of a mixture of PA2 (C.sub.1) hydroquinone and PA2 (C.sub.2) 4,4'-dihydroxydiphenyl, 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.