Patent ID: 6239209
Filing Date: 2001-05-29
Classification: C08F,C08G,C09D,Y10S

Abstract:
An air curable water-borne polyurethane-acrylic hybrid interpenetrating polymer network formed by:(a) blending a polyurethane prepolymer having(i) acid or amine salt forming groups,(ii) air curable ethylenic unsaturation and(iii) terminal isocyanate groups or both terminal isocyanate groups and terminal vinyl groups, with one or more vinyl monomers, inert to isocyanate functionality;(b) dispersing the prepolymer/vinyl monomer blend into water,(c) chain extending the terminal isocyanate groups of the prepolymer with one or more active hydrogen containing compounds; and(d) reacting the vinyl monomers by free radical polymerization.