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. 13, 1976
Filed:
Jan. 23, 1974
Hoechst Aktiengesellschaft, Frankfurt, DT;
Abstract
A process for the preparation of modified N,N'-substituted-2,4,5-triketoimidazolidines which comprises reacting a precondensate having terminal isocyanate groups, prepared by reacting (a) a polybasic carboxylic acid, containing from 4 to 70 carbon atoms and from 2 to 6 carboxyl groups, with an excess of (b) one or more isocyanates or isocyanate forming compounds in the presence of a solvent, with (c) at least one oxamidic ester containing the group NH--CO--CO--OR.sup.v wherein R.sup.v represents an aliphatic hydrocarbon group containing up to 18 carbon atoms, a cycloaliphatic hydrocarbon group containing up to 8 carbon atoms or a mononuclear aromatic hydrocarbon group being unsubstituted or substituted by at least one hydrocarbon group and having a total of up to 14 carbon atoms in the presence of a solvent, a product prepared by said process and a shaped article comprising such a product.