Polyurethane hydrogels and process for their manufacture
US4644033A · kind A · utility
57Cited by
0References
21Claims
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Assignee
Inventors
Key dates
| Filing date | May 23, 1985 |
| Grant date | Feb 17, 1987 |
| Priority date | — |
| Expiry date | May 23, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S525/937
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The hydrogels consist essentially of the polyurethane of polyoxyethylene. The crosslinking is carried out by a reaction of a polyfunctional isocyanate with the polyoxyethylene in solution in a non-aqueous solvent. Transparent hydrogels are obtained, having a high swelling ratio in the presence of water and good mechanical properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.