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:
Jul. 23, 2002
Filed:
Aug. 24, 2000
Applicant:
Inventors:
Helmut Springer, Dinslaken, DE;
Klaus-Dieter Merscher, Buttelborn, DE;
Rudolf Heumuller, Repulse Bay Road, HK;
Klaus Schimmer, Dossenheim, DE;
Heinz Strutz, Usingen, DE;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C 5/100 ; C07C 6/900 ; C07C 6/702 ; C11C 1/00 ; C11C 3/00 ;
U.S. Cl.
CPC ...
C07C 5/100 ; C07C 6/900 ; C07C 6/702 ; C11C 1/00 ; C11C 3/00 ;
Abstract
The present invention relates to a process for preparing ester plasticizers from ethylene glycol or the dimers, trimers or tetramers of this compound and linear or branched aliphatic monocarboxylic acids having from 3 to 20 carbon atoms. The reaction is carried out in the presence of organic substances having a boiling point of <112° C., in particular cyclohexane, as azeotrope formers (entrainers) for removing the water of reaction.