Hydraulic and earth engineering – Earth treatment or control – Chemical
Patent
1977-05-06
1978-09-19
Cockeram, H.S.
Hydraulic and earth engineering
Earth treatment or control
Chemical
405259, E02D 312, C08G 1865, E21D 1100
Patent
active
041143825
ABSTRACT:
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.
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patent: 2764565 (1956-09-01), Hoppe et al.
patent: 3181611 (1965-05-01), Dollarhide
patent: 3397542 (1968-08-01), Moulden
patent: 3491916 (1970-01-01), Graham
patent: 3756388 (1973-09-01), Murphy
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patent: 3805531 (1974-04-01), Kistner
patent: 3882684 (1975-05-01), Meyer et al.
Kubens Rolf
Meyer Frank
Bayer Aktiengesellschaft
Cockeram H.S.
Colen Frederick H.
Harsh Gene
Pope Lawrence S.
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