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AssigneeBayer Aktiengesellschaft
InventorsRolf Kubens, Frank Meyer
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This invention concerns a method of consolidating geological formations, heaped rock and earth masses by applying a polyurethane reaction system to the material to be consolidated. The reaction system comprises a polyisocyanate component and a polyol component wherein the polyol component contains about 5 to 50 wt.% of a special polyether with an OH number under about 100. This polyether is produced by the reaction of a compound having more than one reactive hydrogen atom per molecule and a molecular excess of a 1,2-alkylene oxide. The reaction system can also contain conventional polyurethane additives such as foaming agents, fillers, foam stabilizers and catalysts. In a preferred embodiment, the special polyether is produced from ethylene diamine or triethanol amine.
A process for consolidating geological formations comprising applying an at least two-component reactive polyisocyanate/polyol mixture to the material to be consolidated wherein said reactive polyisocyanate/polyol mixture comprises:
A process for consolidating geological formations encountered in coal mining comprising applying an at least two-component reactive polyisocyanate/polyol mixture to the material to be consolidated wherein the reactive polyisocyanate/polyol mixture comprises:
Dependencies are inferred from the claim text.