Preparation of high molecular polyesters of 1,4-butanediol

US3940367A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Herbert Pelousek · Dormagen, DE
• Alfred Horbach · Krefeld, DE
• Ludwig Bottenbruch · Krefeld, DE
• Rudolf Binsack · Krefeld, DE

Key dates

• Filing date: Aug 6, 1974
• Grant date: Feb 24, 1976
• Expiry date: Aug 6, 1994

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K5/52
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Low-molecular polyesters prepared by the condensation of diols and dicarboxylic acid dialkyl esters show a substantially improved capactiy to undergo polycondensation in a susequent polycondensation below the melting point if said low-molecular polyesters are prepared from pressure trans-esterification products by polycondensation in the melt.