| 摘要 |
Dental lacquers for use as base fillings in cavities and for sealing cracks, contain NCO-contg. telomers or graft copolymers of (a) 10-99 wt.% of opt. blocked aliphatic and/or araliphatic polyisocyanates, (b) 10-70 wt.% methyl methacrylate, (c) 0.3-10 wt.% of olefinic cpds. with NCO gps. or gps. reactive towards NCO gps. or opt. towards the hardener to be used, and (d) 0-25 wt.% of other olefinic cpds., as the binder in one-component lacquers or as the binder component in two-component lacquers. They are hardened on contact with moisture. |
