Wholly aromatic thermotropic polyesters

US4764582A · 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: Aug 11, 1987
• Grant date: Aug 16, 1988
• Expiry date: Aug 11, 2007

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G63/685
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Wholly aromatic thermotropic polyesters are based on PA0 (A) from 25 to 60 mol % of a mixture of PA1 (A.sub.1) 4-hydroxybenzoic acid and PA1 (A.sub.2) 3-hydroxybenzoic acid, 4-aminobenzoic acid and/or 3-aminobenzoic acid or their chlorine, bromine, C.sub.1 -C.sub.8 -alkyl or C.sub.1 -C.sub.8 -alkoxy derivatives substituted in the nucleus, PA0 the molar ratio of A.sub.1 to A.sub.2 being from 5:1 to 41:1, PA0 (B) from 20 to 37.5 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 37.5 mol % of a mixture of PA1 (C.sub.1) hydroquinone and PA1 (C.sub.2) 4,4'-dihydroxydiphenyl, 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.