Microporous polyurethane hydrogels, method and composites with natural and other synthetic fibers or films
US3939105A · kind A · utility
54Cited by
10References
33Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 18, 1974 |
| Grant date | Feb 17, 1976 |
| Priority date | — |
| Expiry date | Jun 18, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2913
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Microporous polyurethane hydrogels of high water swellability comprising lightly crosslinked polymers of isocyanate terminated prepolymers which are the reaction product of (i) poly(alkyleneoxy) polyol with (ii) organic diisocyanate that has been lightly crosslinked with (iii) water or an organic polyamine are produced by impregnating the isocyanato terminated prepolymer solution prior to contact with the crosslinking agent with a minor significant amount of a liquid non-solvent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.