Thermotropic, fully aromatic polyesters with excellent figidity and toughness, a process for their preparation and their use for the production of shaped articles, filaments, fibres and films

US4780525A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Volker Eckhardt · Walsrode, DE
• Hans-Rudolf Dicke · Bestwig, DE
• Ludwig Bottenbruch · Krefeld, DE
• Aziz E. Sayed · Leverkusen, DE

Key dates

• Filing date: Sep 15, 1986
• Grant date: Oct 25, 1988
• Expiry date: Sep 15, 2006

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G63/605
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Thermotropic, fully aromatic polyesters of p-hydroxybenzoic acid, 3,4'-benzophenone-dicarboxylic acid and certain bisphenols have a previously unknown combination of very high rigidity and high toughness.