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:
Feb. 07, 1984
Filed:
Oct. 15, 1980
Applicant:
Inventors:
Peter Heitkamper, Dormagen, DE;
Klaus Konig, Leverkusen, DE;
Kurt Findeisen, Odenthal, DE;
Rudolf Fauss, Cologne, DE;
Rudolf Sundermann, Leverkusen, DE;
Assignee:
Bayer Aktiengesellschaft, Leverkusen, DE;
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ;
U.S. Cl.
CPC ...
560 24 ; 2604654 ; 2604 / ; 260404 ; 2602 / ; 260938 ; 560 22 ; 560 25 ; 560 27 ; 560 28 ; 560 29 ; 560 30 ; 560 31 ; 560 32 ; 560115 ; 560145 ; 560157 ; 560158 ; 560160 ; 560161 ; 544164 ; 544322 ; 546312 ; 546334 ; 549 28 ; 549467 ;
Abstract
A process for the preparation of N,O-disubstituted urethanes. Urea or polyurets, primary amines and alcohols are reacted at 120.degree.-350.degree. C. in the presence of N-substituted urethanes and/or N-mono- or N,N'-disubstituted ureas or polyureas. In a preferred embodiment, the reactants further include catalysts known to be useful in esterification of carboxylic acids. The urethanes produced in accordance with this process are particularly useful as starting materials for preparation of isocyanates.