Thermotropic aromatic polyesters with good rigidity and toughness, process for the production thereof and the use thereof for the production of mouldings, filaments fibres and films

US4600764A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Hans-Rudolf Dicke · Bestwig, DE
• Ludwig Bottenbruch · Krefeld, DE
• Dieter Freitag · Krefeld, DE
• Aziz E. Sayed · Leverkusen, DE

Key dates

• Filing date: Apr 15, 1985
• Grant date: Jul 15, 1986
• Expiry date: Apr 15, 2005

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 contain radicals of 3,4'- and/or 4,4'-dihydroxybenzophenone in addition to radicals of p-hydroxybenzoic acid, iso- and optionally terephthalic acid, hydroquinone and/or 4,4'-dihydroxydiphenyl, have good rigidity and toughness and yet are easily processible.