Thermotropic aromatic polyesters having a high deflection temperature under load and excellent mechanical properties, a process for their preparation and their use for the production of moldings, filaments, fibres and films

US4806619A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Volker Eckhardt · Walsrode, DE
• Hans-Rudolf Dicke · Bestwig, DE
• Erich Hammerschmidt · Bensberg, DE
• Dieter Freitag · Krefeld, DE

Key dates

• Filing date: Oct 2, 1986
• Grant date: Feb 21, 1989
• Expiry date: Oct 2, 2006

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G63/19
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Thermotropic, fully-aromatic polyesters having a high content of 3,4'-benzophenonedicarboxylic acid radicals exhibit a combination, hitherto unknown, of good processability, high deflection temperature under load and very high strength and stiffness.