Patent · US Active

Method for producing ethylene glycol dimethacrylate

US8686181B2 · kind B2 · utility

1Cited by

6References

26Claims

0Family size

Assignee

Evonik Röhm GmbH · DE

Inventors

Joachim Knebel · Zwingenberg, DE
Thorben Schuetz · Seeheim-Jugenheim, DE
Guido Protzmann · Bensheim, DE
Harald Trauthwein · Munich, DE
Guenther Lauster · Worms, DE
Thomas Kehr · Heilbad Heiligenstadt, DE
Gerhard Koelbl · Gernsheim, DE
Guenter Westhaeuser · Guntersblum, DE

Key dates

Filing date	May 8, 2008
Grant date	Apr 1, 2014
Priority date	—
Expiry date	Jan 27, 2031

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C67/03
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The present invention relates to a process for preparing ethylene glycol dimethacrylate, which comprises transesterification of ethylene glycol with an ester of methacrylic acid in the presence of catalysts, wherein a combination comprising lithium amide (LiNH2) and lithium chloride (LiCl) is used as catalyst. The process of the invention makes it possible to prepare ethylene glycol dimethacrylate particularly inexpensively and in a very high purity.

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