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. 19, 1977
Filed:
Feb. 28, 1975
Kurt Kraft, Wiesbaden-Dotzheim, DT;
Johannes Reese, Wiesbaden-Biebrich, DT;
Hoechst Aktiengesellschaft, Frankfurt, DT;
Abstract
A modified N,N'-substituted 2,4,5-triketoimidazolidine containing polycarboxylic acid amide or imide groups at least in the main chain, a process for its manufacture which comprises reacting at a temperature of from minus 20 to plus 280.degree. C (a) at least one oxamidic ester having the group --NH--CO--CO--OR.sup.v, wherein R.sup.v is an aliphatic hydrocarbon group having up to 18 carbon atoms, a cycloaliphatic hydrocarbon group with up to 8 carbon atoms, a mononuclear aromatic hydrocarbon group which may contain at least one hydrocarbon group which constitutes a total of up to 14 carbon atoms (b) at least one isocyanate having or yielding 1 to 4 isocyanate groups or isocyanates forming compound and (c) a polybasic carboxylic acid component having 4 to 71 carbon atoms and 2 to 6 carboxylic groups so as to obtain a condensation product possessing amide or imide groups.