Patent ID: 6960639

Claim:
Aqueous coating compositions comprising (I) at least one polyisocyanate, (II) at least one polyurethane which contains free-radically polymerizable groups and up to 0.53 mmol/g, of groups containing Zerevitinov-active hydrogen atoms, and (III) an initiator which is capable of initiating a free-radical polymerization, wherein the polyurethane is a reaction product of (a) one or more second polyisocyanates, (b1) one or more hydrophilicizing compounds containing at least one of nonionic groups and/or ionic groups and/or groups which can be converted into ionic groups, and (b2) one or more compounds containing free-radicaily polymerizable groups selected from the group consisting of hydroxy-functional acrylates, hydroxy-functional methacrylates and combinations thereof.