Polyurethane prepolymer composition comprising a water-immiscible solvent
US5102938A · kind A · utility
6Cited by
7References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 5, 1990 |
| Grant date | Apr 7, 1992 |
| Priority date | — |
| Expiry date | Jun 5, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S524/916
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A hydrophilic polyurethane prepolymer in a compatible, water-immiscible solvent or water-immiscible solvent blend having a solids content of greater than about 10 and less than about 50 percent prepolymer in the solvent or solvent blend. This composition reacts with water at about a 1:1 ratio by volume to produce an excellent gel for use in sealing water containing structures and soil stabilization. In the cure process, the compositions of the present invention expand less than 50%, and preferably less than 30%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.