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:
Mar. 19, 2013
Filed:
May. 10, 2010
Rainer Stürmer, Rödersheim-Gronau, DE;
Dejana Drew, Houston, TX (US);
Bernhard Hauer, Fuβgönheim, DE;
Jürgen Däuwel, Heidelberg, DE;
Uwe Meisenburg, Mannheim, DE;
Rainer Stürmer, Rödersheim-Gronau, DE;
Dejana Drew, Houston, TX (US);
Bernhard Hauer, Fuβgönheim, DE;
Jürgen Däuwel, Heidelberg, DE;
Uwe Meisenburg, Mannheim, DE;
BASF SE, Ludwigshafen, DE;
Abstract
The invention relates to a process for preparing urethane-containing acrylic- and (meth)acrylic esters by reacting a urethane-containing alcohol with a reactant acrylic- or (meth)acrylic ester of a saturated alcohol in the presence of at least one polymerization inhibitor and an enzyme as a catalyst within a reactor, wherein the saturated alcohol released in the process and optionally an entraining agent form an azeotrope with an excess of the reactant (meth)acrylic ester, such that the azeotrope is removed by distillation under reduced pressure and at least one substream from the bottom of the reactor is circulated through the top of the distillation column. Using this process, urethane-containing acrylic- and (meth)acrylic esters are prepared in high yields and high purities under mild conditions from economically obtainable reactants with no significant polymer formation.