Hydraulic and earth engineering – Earth treatment or control – Chemical
Patent
1982-09-24
1984-10-09
Griffin, Ronald W.
Hydraulic and earth engineering
Earth treatment or control
Chemical
166295, 299 11, 405261, 521174, 521176, 523130, 523131, 523132, E21B 33138, C08G 1876, E02B 312
Patent
active
044758472
ABSTRACT:
For consolidation of geological formations and artificial beds of rock, earth, and coal by means of foaming and hardening polyisocyanate/polyol blends, diols with secondary hydroxyl functions of the OH number range 150-1000 are used as diol component. Preferably a crude polyisocyanate blend (MDI) obtained by phosgenation of aniline/formaldehyde condensates which at ambient temperature assumes a liquid state, and the liquid prepolymers of said crude MDI are used as isocyanate components.
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patent: 3367892 (1968-02-01), Jorczak et al.
patent: 3882684 (1975-05-01), Meyer et al.
patent: 4113014 (1978-09-01), Kubens et al.
patent: 4114382 (1978-09-01), Kubens et al.
patent: 4129697 (1978-12-01), Schapel et al.
patent: 4256846 (1981-03-01), Ohashi et al.
Cornely Wolfgang
Kubens Rolf
Mehesch Hans
Meyer Frank
Winkelmann Martin
Bayer Aktiengesellschaft
Bergwerksverband GmbH
Gil Joseph C.
Griffin Ronald W.
Harsh Gene
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