Process of sealing and strengthening water-bearing geological formations by means of polyurethane-resin-forming compositions
US4454252A · kind A · utility
13Cited by
10References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 22, 1982 |
| Grant date | Jun 12, 1984 |
| Priority date | — |
| Expiry date | Mar 22, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S528/905
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Processes for sealing and strengthening water-bearing geological formations by injection thereinto a polyurethane-resin-forming composition that is especially suitable for this purpose which comprises a conventional polyisocyanate, a conventional polyol, an accelerator for the reaction between the polyisocyanate and the polyol, and a foam stabilizer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.