| abstract |
The present inventionn n n a) at least one polyisocyanaten n n b) at least one polyol andn n n c) at least one photoinitiator of the formulan n n Polyurethanes which are substantially self-dispersible in water, obtainable by reaction with and whose number average molecular weight M n is at least 2,700 and their use are described.n n n n n n n n n n Wheren n n R is a radical of the formulan n n n n n n n n n Or -CR 7 R 8 R 9 , P (= 0) (R 10 ) 2 or SO 2 R 11 . The invention also relates to coating compositions comprising polyurethane resin aqueous dispersions and novel polyurethanes, and their use. |