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Process for consolidation and sealing of geological formations and artificial beds of rock, earth, and coal
Process for consolidation and sealing of geological formations and artificial beds of rock, earth, and coal
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机译:固结和封闭岩石,地球和煤炭的地质构造和人造床的方法
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摘要
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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