Thermoplastic block copolyesters, a process for their production and their use for the production of mouldings

US4382131A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Rudolf Binsack · Krefeld, DE
• Karl-Heinz Köhler · Aachen, DE
• Leo Morbitzer
• Ludwig Bottenbruch · Krefeld, DE
• Walter Heitz · Kirchhain, DE

Key dates

• Filing date: Dec 10, 1981
• Grant date: May 3, 1983
• Expiry date: Dec 10, 2001

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G63/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Block copolyesters based on polyalkylene terephthalates which contain polyene blocks show an extremely low deformation even when they are processed into thin articles. They still have a crystallinity which is decreased by less than the ratio corresponding to the polyene portion.