Patent ID: 6335397
Filing Date: 2002-01-01
Classification: C08L,C09D

Abstract:
A water-dispersible polyurethane, which is essentially free from protective colloids or emulsifiers, comprising in dispersed form:A) a polyurethane (A) comprising hydrophilic groups, which effect the water-dispersibility of the polyurethane, the polyurethane (A) being essentially free from Câ€”C double bonds; and B) a non self-dispersible radiation-curable prepolymer having a content of from 0.1 to 1 mol of free-radically polymerizable Câ€”C double bonds per 100 g of prepolymer; wherein the polyurethane (A) and the prepolymer (B) are present a form comprising a molecular mixture and not in the form of a dispersion, containing in one discontinuous phase only the polyurethane (A) and in a further discontinuous phase the prepolymer (B).