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:
May. 29, 1979
Filed:
Feb. 17, 1978
Applicant:
Inventors:
Assignee:
NHK Spring Co., Ltd., Yokohama, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
260 / ; 528 68 ;
Abstract
A urea compound having a sulfonate radical is obtained by reaction of aminoaminosulfonate represented by the formula: ##STR1## (where R.sub.1 is a hydrocarbon-based radical, and R.sub.3 is propylene radical, a substituted propylene radical, butylene radical or a substituted butylene 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.