Process for stabilizing rock and coal formations by bonding these formations to themselves or other geological formations
AssigneeBASF SE
InventorsDiether Arndt, Dietmar Hobein
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Abstract
The invention relates to a process for stabilizing rock and coal formations by bonding them to each other or to other geological formations. The bonding material is a reactive organic polyisocyanate-polyol mixture which may contain a catalyst.
Claims7
In a process for stabilizing rock and coal formations by bonding them to themselves or other geological formations by means of a reactive organic polyisocyanate-polyol mixture, wherein the improvement comprises selecting as the polyol component, a mixture comprising:
- (a) from 1 part to 60 parts by weight of at least one tri- to octafunctional polyether polyol having a hydroxyl number of 390 to 580;
- (b) from 40 parts to 99 parts by weight of at least one difunctional polyether polyol having a hydroxyl number of 200 to 300;
- and
- (c) from 0 part to 100 parts by weight per 100 parts by weight of components (a) and (b) of a flexibilizing agent having a hydroxyl number of 50 to 200.
In a process for stabilizing rock formations and coal formations by bonding them to themselves or other geological formations by means of a reactive organic polyisocyanate-polyol mixture, wherein the improvement comprises selecting as the polyol component, a mixture comprising:
- (a) from 20 parts to 50 parts by weight of at least one tri- to octafunctional polyether polyol having a hydroxyl number of 390 to 570;
- and
- (b) from 50 to 80 parts by weight of at least one difunctional polyether polyol having a hydroxyl number of 200 to 300.
Dependencies are inferred from the claim text.