Patent · US Active

Process for the preparation of (meth)acrylates of tetra- or polyhydric alcohols

US7521578B2 · kind B2 · utility

2Cited by

0References

16Claims

0Family size

Assignee

Evonik Röhm GmbH · DE

Inventors

Bardo Schmitt · Mainz, DE
Joachim Knebel · Zwingenberg, DE
Guenther Graeff · Zwingenberg, DE

Key dates

Filing date	Aug 16, 2006
Grant date	Apr 21, 2009
Priority date	—
Expiry date	Aug 16, 2026

Classification

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

Abstract

Process for the preparation of acrylic and methacrylic acid esters by transesterification of (meth)acrylic acid esters of the formula I: where R1 is H or CH3 and R2 is an alkyl radical having 1 to 40 carbon atoms, with alkanols which have four or more esterifiable hydroxyl groups, characterized in that 0.01 to 10% by weight, based on the total reaction mixture, of lithium amide catalysts are used as transesterification catalyst.

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