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:
Jan. 23, 1979
Filed:
Feb. 17, 1978
Applicant:
Inventors:
Shitomi Katayama, Yokohama, JP;
Nobuaki Koyama, Yokohama, JP;
Hajime Shimabukuro, Yokohama, JP;
Kiyoshi Jin, Shiki, JP;
Assignee:
NHK Spring Co., Ltd., Yokohama, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
260 / ; 260 / ; 260 / ; 260 / ; 528 61 ; 528 71 ;
Abstract
A urea compound having carboxylate radical is obtained by reaction of aminoaminocarboxylate represented by the formula: ##STR1## (where R.sub.1 l is a hydrocarbon-based radical, and R.sub.2 is ethylene radical or a substituted ethylene radical) with diisocyanate, optionally in the presence of diamine and/or water. The reaction may be achieved by interfacial polymerization, solution polymerization, or solvent-free polymerization.