Wholly aromatic polyamide

US4987216A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Gunter Keil
• Karl Heinrich · Großaitingen, DE
• Peter Klein · Burns Lake, CA

Key dates

• Filing date: Oct 16, 1989
• Grant date: Jan 22, 1991
• Expiry date: Oct 16, 2009

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G69/32
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Aromatic copolyamides, soluble in organic polyamide solvents, comprise at least 95 mol % of the recurrent structural units of the formulae ##STR1## and up to 5 mol % of structural units containing m-bonds. Here, --Ar--and --Ar'-- are divalent, unsubstituted or substituted aromatic radicals, the valency bonds of which are in the para-position or in a comparable coaxial or parallel position, and --R is a lower alkyl radical.