| abstract |
A polyurethane which is substantially self-dispersible in water and is obtainable by reacting a) at least one polyisocyanate with b) at least one polyol and c) at least one photoinitiator of the general formula I (see fig. I) where R is a radical of the formula II (see fig. II) or is -CR7R8R9, P(=O)(R10)2 or SO2R11, the number-average molecular weight Mn of the polyurethane being greater than 2700, and its use. The invention also relates to aqueous polyurethane resin dispersions and coating compositions comprising the novel polyurethanes, and to their use. |