PROCESS FOR THE CONSOLIDATION OF GEOLOGICAL FORMATIONS

摘要

This invention concerns a method of consolidating geological formations 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.