Patent ID: 6022925
Filing Date: 2000-02-08
Classification: C08G,C09D

Abstract:
A process for producing a coating composition, which process comprises:a) preparing a functionalized polyurethane prepolymer said prepolymer having at least one functional group selected from hydroxy, isocyanate, acetoacetoxy and n-methylol;b) dispersing said functionalized polyurethane prepolymer in water to form a polyurethane prepolymer dispersion;c) adding a waterborne polymer component to said polyurethane prepolymer dispersion, wherein said waterborne polymer component does not contain functional groups that are amine, isocyanate, hydroxy or carboxy reactive andd) chain extending said functionalized polyurethane prepolymer with a chain extender in the presence of said waterborne polymer component;wherein said waterborne polymer component is selected from the group consisting of latex emulsions, acrylic polymers water-reducible alkyds, alkyd emulsions, polyurethane emulsions, silicone emulsions, polyethylene emulsions, polyamide dispersions and mixtures thereof.