High molecular weight polyesters, preparation and use thereof

US4654411A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Volker Serini · Krefeld, DE
• Bernhard Schulte · Krefeld, DE
• Werner Waldenrath · Cologne, DE
• Dieter Freitag · Krefeld, DE
• Uwe Hucks · Alpen, DE
• Joachim Wank · Dormagen, DE
• Hans-Leo Weber · Eschenried, DE

Key dates

• Filing date: Sep 3, 1985
• Grant date: Mar 31, 1987
• Expiry date: Sep 3, 2005

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G63/193
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Polyesters having at least 90%, by weight, of recurrent structural units corresponding to the following formula: ##STR1## and characterised by a relative viscosity.eta..sub.rel of from 1.6 to 4.5 (determined at 25.degree. C. in CH.sub.2 Cl.sub.2, c=5 g/l) are suitable for the production of films having highly advantageous performance characteristics, in particular high heat resistance.