Hydraulic and earth engineering – Earth treatment or control – Chemical
Patent
1987-04-15
1987-12-29
Taylor, Dennis L.
Hydraulic and earth engineering
Earth treatment or control
Chemical
252 8551, 528 49, 528 76, 523130, 523131, 521117, 405263, 405258, E02D 312
Patent
active
047157461
ABSTRACT:
The present invention relates to a method of strengthening geological formations in underground workings or mines by introducing reaction mixtures containing a polyisocyanate component (a), a polyol component (b) and optionally auxiliary agents and additives (c) into the formation which is required to be strengthened and reacting the mixtures to form polyurethanes, wherein polyol component (b) contains mixtures of (i) organic polyhydroxyl compounds having a hydroxyl number of about 100 to 800 and (ii) monovalent alcohols having a molecular weight of 32 to about 600, component (ii) being present in an amount of about 0.01 to 20% by weight, based on the total quantity of component (b).
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Kapps Manfred
Mann Max
Bayer Aktiengesellschaft
Bergwerksverband GmbH
Gil Joseph C.
Harsh Gene
Roy Thomas W.
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