Patent Number: 6,166,165

Title: Polyurethane synthesis from functional group terminated polymers containing sulfonate groups

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.

Inventors: Chang; Wally L. (Naperville, IL)

Assignee: Witco Corporation

International Classification: C08G 63/688 (20060101); C08G 63/00 (20060101); C08G 63/91 (20060101); C08G 18/08 (20060101); C08G 18/10 (20060101); C08G 18/66 (20060101); C08G 18/00 (20060101); C08G 18/46 (20060101); C08G 18/12 (20060101); C08G 018/10 ()

Expiration Date: 12/26/2013