Polyurethane hydrogel fibers and tapes and composites with natural and other synthetic fibers or films
US3940542A · kind A · utility
27Cited by
10References
46Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 18, 1974 |
| Grant date | Feb 24, 1976 |
| Priority date | — |
| Expiry date | Jun 18, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31551
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Method for the production of water swellable, lightly crosslinked, hydrogel polymer tapes or fibers comprises extruding an isocyanato terminated prepolymer of a poly(alkyleneoxy) polyol and an organic diisocyanate into a coagulant or crosslinking bath containing water or organic polyamine as the crosslinker.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.