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:
Apr. 05, 2005
Filed:
May. 28, 2001
Gerhard Nestler, Ludwigshafen, DE;
Jürgen Schröder, Ludwigshafen, DE;
Gerhard Nestler, Ludwigshafen, DE;
Jürgen Schröder, Ludwigshafen, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
In a process for preparing an ester of an unsaturated carboxylic acid by reacting an ester of the unsaturated carboxylic acid and a C-C-alkanol with an alcohol ROH, where Ris a C-C-alkyl radical, a C-C-cycloalkyl radical, a phenyl-C-C-alkyl radical or a C-C-alkyl radical substituted by at least one NRRgroup or by from 1 to 3 hydroxyl groups or C-C-alkoxyl groups or interrupted by one or more oxygen atoms, where the radicals Rare, independently of one another, C-C-alkyl or together with the nitrogen atom form a 5- to 7-membered heterocyclic ring which may contain a further nitrogen or oxygen atom, in the presence of a transesterification catalyst, the transesterification catalyst used is at least one metal alkanolate containing at least one ORgroup, where Ris a 2,2,6,6-tetraalkyl-1-oxylpiperidin-4-yl radical.