| 摘要 |
The invention relates to grouts which are resistant to liquid hydrocarbons and are based on A) from 50 to 80 parts by weight of a polyether-polyol mixture having a mean functionality of from 2.1 to 3 and a hydroxyl number of from 80 to 200, preferably comprising i) from 30 to 70 parts by weight of at least one difunctional polyether-polyol having a hydroxyl number of from 100 to 350 and ii) from 30 to 70 parts by weight of at least one trifunctional to tetrafunctional polyether-polyol having a hydroxyl number of from 15 to 50, B) from 25 to 60 parts by weight of an NCO group-containing prepolymer having an NCO content of from 2 to 20% by weight, prepared from polyether-polyols having a functionality of from 2 to 3 and a hydroxyl number of from 30 to 100 and organic polyisocyanates, C) from 0.05 to 2.0 parts by weight, per 100 parts by weight of components A and B, of a polyurethane catalyst, and optionally D) from 3 to 60 parts by weight, per 100 parts by weight of components A and B, of a filler. The grouts are particularly suitable for water-tight filling of joints, grooves and cavities in concrete.
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