Thermotropic aromatic polymers with high elongation at break, processes for their preparation and their use for the production of moulded articles, filaments, fibres and films

US4835243A · kind A · utility

Inventors

• Volker Eckhardt · Walsrode, DE
• Hans-Rudolf Dicke · Bestwig, DE
• Erich Hammerschmidt · Bensberg, DE
• Ludwig Bottenbruch · Krefeld, DE
• Frank Kleiner · Cologne, DE
• Heinz U. Blank · Odenthal, DE

Key dates

• Filing date: Jun 13, 1988
• Grant date: May 30, 1989
• Expiry date: Jun 13, 2008

Classification

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

Abstract

Thermotropic, fully aromatic polyesters based on p-hydroxybenzoic acid, aromatic dicarboxylic acid and diphenol in which the dicarboxylic acid groups consist at least in part of 3,3'-diphenyldicarboxylic acid groups have excellent mechanical properties, in particular excellent elongation at break.