The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 01, 2011
Filed:
May. 08, 2008
Guido Protzmann, Bensheim, DE;
Harald Trauthwein, Buerstadt, DE;
Joachim Knebel, Alsbach-Haehnlein, DE;
Thorben Schuetz, Seeheim-Jugenheim, DE;
Gerhard Koelbl, Gernsheim, DE;
Thomas Kehr, Muehltal, DE;
Guenther Lauster, Worms, DE;
Guido Protzmann, Bensheim, DE;
Harald Trauthwein, Buerstadt, DE;
Joachim Knebel, Alsbach-Haehnlein, DE;
Thorben Schuetz, Seeheim-Jugenheim, DE;
Gerhard Koelbl, Gernsheim, DE;
Thomas Kehr, Muehltal, DE;
Guenther Lauster, Worms, DE;
Evonik Röhm GmbH, Darmstadt, DE;
Abstract
The present invention relates to a process for preparing (meth)acrylates, which comprises the transesterification of an alcohol with a low-boiling ester of (meth)acrylic acid in the presence of catalysts, with the alcohol liberated from the low-boiling ester of (meth)acrylic acid being separated off by distillation, characterized in that the molar ratio of low-boiling ester of (meth)acrylic acid to starting alcohol present in the reaction mixture is increased during the reaction by addition of low-boiling ester of (meth)acrylic acid. The process of the invention makes a particularly inexpensive preparation of (meth)acrylates having a very high purity possible.