abstract |
PROCESS FOR CONSOLIDATION OF GEOLOGICAL FORMATIONS OF ROCKS, EARTH AND COAL, BY MEANS OF POLYISOCYANATE-POLYOL MIXTURES WHICH EXPAND AND HARDEN. IT IS CHARACTERIZED IN THAT DIOLS CONTAINING SECONDARY HYDROXYL GROUPS, WHOSE OH INDEX OF WHICH IS BETWEEN 150 AND 1000, ARE USED AS A DIOL CONSTITUENT IS A MIXTURE OF RAW POLYISOCYANATES LIQUID AMIAN AT TEMPERATURE, OBTAINED BY PHOSGENATION OF ANILINEFORMALDEHYDE CONDENSATES, AS WELL AS ITS LIQUID PREPOLYMERS. |