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AssigneeBayer Aktiengesellschaft
InventorsManfred Kapps, Max Mann, Peter Vehlewald, Frank Meyer, Hans-Ernst Mehesch, Wolfgang Cornely, Birgit Riecks
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The present invention is directed to a process for strengthening geological formations in underground mining or other operations introducing into the formation which is to be strengthened mixtures of a polyisocyanate component (a) and a polyol component (b) which react together to form polyurethanes, characterized in that the polyol component (b) is based on mixtures of (i) organic polyhydroxyl compounds having hydroxyl numbers of about 100 to 600 and (ii) dihydric alcohols having a molecular weight of 62 to about 150, component (ii) being present in an amount of about 0.01 to 20% by weight, based on the total quantity of component (b).
A process for strengthening geological formations in underground mining or other operations which comprises introducing into the formation to be strengthened, a polyurethane-forming reaction mixture comprising
A process for strengthening geological formations in underground mining or other operations which comprises introducing into the formation to be strengthened, a polyurethane-forming reaction mixture comprising
Dependencies are inferred from the claim text.