Patent · US Expired

Process for preparing ester plasticizers

US6423856B1 · kind B1 · utility

6Cited by

5References

9Claims

0Family size

Assignee

CELANESE CHEMICALS EUROPE GMBH · DE

Inventors

Helmut Springer · Dinslaken, DE
Klaus Dieter Merscher · Büttelborn, DE
Rudolf Heumuller · Hong Kong, CN
Klaus Schimmer · Dossenheim, DE
Heinz Strutz · Usingen, DE

Key dates

Filing date	Aug 24, 2000
Grant date	Jul 23, 2002
Priority date	—
Expiry date	Aug 30, 2020

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB32B17/10605
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The present invention relates to a process for preparing ester plasticizers from ethylene glycol or the dimers, trimers or tetramers of this compound and linear or branched aliphatic monocarboxylic acids having from 3 to 20 carbon atoms. The reaction is carried out in the presence of organic substances having a boiling point of <112° C., in particular cyclohexane, as azeotrope formers (entrainers) for removing the water of reaction.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.