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:
Dec. 09, 1980
Filed:
May. 18, 1979
Hans Zengel, Kleinwallstadt, DE;
Manfred Bergfeld, Erlenbach, DE;
Rainer Zielke, Erlenbach, DE;
Erich Klimesch, Erlenbach, DE;
Akzona Incorporated, Asheville, NC (US);
Abstract
A process for the preparation of derivatives of aliphatic, cycloaliphatic, and araliphatic compounds containing from 1 to 3 isocyanate groups bonded to from 1 to 3 secondary or tertiary carbon atoms, or a combination thereof, is disclosed. The process comprises reacting a compound of the formula R--(CO--NHCl).sub.n, wherein R represents an aliphatic, cycloaliphatic, or araliphatic radical, with a tertiary amine having a pK.sub.a greater than 7, at a temperature from about 20.degree. to about 180.degree. C., in an inert solvent, to form a compound of the formula R--(N.dbd.C.dbd.O).sub.n, wherein the isocyanate groups are bonded to secondary or tertiary carbon atoms.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile