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. 05, 1977
Filed:
Jul. 12, 1976
Applicant:
Inventors:
Assignee:
Kao Soap Co., Ltd., Tokyo, JA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08G / ; C08J / ;
U.S. Cl.
CPC ...
260 / ; 260 / ; 260 / ; 260 / ;
Abstract
An aqueous polyurethane emulsion is prepared by reacting a polyhydroxyl component containing 15 to 80% by weight of a polyoxyethylene glycol having a molecular weight of 200 to 10,000 with an excess of an organic polyisocyanate to obtain an isocyanate-terminated urethane prepolymer, reacting that prepolymer with an excess of a polyalkylene polyamine thereby to form a polyurethane-urea-polyamine, reacting the free amino groups in the polyurethane-urea-polyamine with a blocked polyisocyanate having a single free isocyanate group, and mixing the resulting product with water, or reacting said resulting product with a cyclic dicarboxylic acid anhydride followed by mixing with water.