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:
Dec. 26, 2000
Filed:
Dec. 18, 1996
Applicant:
Inventor:
Wally L Chang, Naperville, IL (US);
Assignee:
Witco Corporation, Greenwich, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528 60 ; 528 61 ; 528 65 ; 528 71 ; 528 75 ; 524591 ; 524840 ;
Abstract
Disclosed is a process for producing water-dispersible polyurethanes by forming an isocyanate-di-substituted prepolymer and reacting it with a chain extender. The prepolymer can be formed by reacting a diisocyanate with an ethylenically unsaturated precursor which is preferably formed by condensation polymerization of reactants including ethylenically unsaturated reactants and then sulfonating the ethylenic unsaturation of said polymeric precursor by reacting it with a sulfonating agent such as bisulfite, metabisulfite, or a mixture thereof.