Process for producing shaped polyurethane hydrogel articles
US4209605A · kind A · utility
59Cited by
6References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 19, 1978 |
| Grant date | Jun 24, 1980 |
| Priority date | — |
| Expiry date | Oct 19, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S528/904
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Continuous process for producing hydrogels by charging preselected feeds containing poly(oxyalkylene) polyols, organic diisocyanate and catalyst to a reaction zone followed by crosslinking by exposure to atmospheric humidity. Solvents are not used and the hydrogels are shaped in desired configuration as they exit the extruder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.