Thermotropic, fully aromatic polyesters prepared by polycondensation of aromatic diphenols and aromatic carboxylic acids

US5037939A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Volker Eckhardt · Walsrode, DE
• Dieter Freitag · Krefeld, DE
• Karsten-Josef Idel · Krefeld, DE

Key dates

• Filing date: Jun 29, 1990
• Grant date: Aug 6, 1991
• Expiry date: Jun 29, 2010

Classification

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

Abstract

Thermotropic, fully aromatic polyesters which have been prepared by polycondensation of p-hydroxybenzoic acid, hydroquinone, 4,4-dihydroxydiphenyl, terephthalic acid and isophthalic acid and which contain specific amounts of the radicals of the compounds mentioned are distinguished by an excellent toughness, very high heat distortion temperature and good processability.