| 摘要 |
Polyurethanes with olefinic double bonds and a content of 20-80 wt.% ethylene oxide (EO) units in the form of polyethylene glycol chains (I) are obtd. by reacting (a) polyisocyanates with (b) polybutadiene derivs. which are reactive towards isocyanates, (c) opt. diols with at least one other OH or COOH gp., and (d) polyoxyalkylene glycol components with a mol. wt. of 500-10,000, at an equiv. ratio of NCO-OH gps. = (0.5:1)-(1.2:1). Also claimed are (i) water-dispersible mixts. (II) of radically-curable, unsatd. gp.-contg. resins contg. (A) 50-95 pts. wt. non-water-dispersible unsatd. synthetic resin(s) with an average mol. wt. (Mn) of 500-10,000 and (B) 5-50 pts. wt. (I); (ii) aq. coating materials contg. a radically- and/or oxidatively-curable mixt. (II) as binder, and opt. other conventional paint components and additives. |
