| 摘要 |
<p>Aq. air-drying or oven-drying lacquers based on dispersions or solns. of water-dilutable or water-dispersible oxidatively drying epoxy-modified polyurethanes or polyurethane copolymer resins contain polyurethane resins as binder, of following composition (a) 25-70 wt.% unsatd. fatty acids 0-25% of which may be drying oils, (b) 0-30 wt.% aliphatic cycloaliphatic aromatic carbonic acids or hydroxycarbonic acid or mixtures or their anhydrides. (c) 3-35 wt.% mono and/or poly alcohols (d) 0-17 wt.% polyoxyalkyl cpds. with at least one active H and an av. m. wt. of 200-50000 or mixtures thereof. (e) 1-50 wt.% epoxy cpds., (f) 0-60 wt.% graft polymerisable monomers, (g) 0.05-50 wt.% isocyanates, (h) 0-65 wt.% unsatd. mono- and/or polyalcohols and (i) the caustic salt and/or salt from strong organic bases of the polyurethane, if this contains OH gps.</p> |
