Thermotropic aromatic polyesters, a process for their production and their use for the production of moldings, filaments, fibers and films

US4931534A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Ralf Pakull · Krefeld, DE
• Volker Eckhardt · Walsrode, DE
• Joachim Genz · Krefeld, DE
• Karsten-Josef Idel · Krefeld, DE
• Hans R. Kricheldorf · Hamburg, DE
• Volker Doring · Stuttgart, DE

Key dates

• Filing date: Apr 26, 1989
• Grant date: Jun 5, 1990
• Expiry date: Apr 26, 2009

Classification

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

Abstract

The thermotropic aromatic polyesters according to the invention which contain recurring units corresponding to the following formulae ##STR1## show improved resistance to chemicals, low melting points and, hence, good processibility in addition to the well-known favorable mechanical properties of liquid-crystal materials. The thermotropic aromatic polyesters are used for the production of moldings, filaments, fibers and films.