Polyurethane hydrogels having enhanced wetting rates
US4182827A · kind A · utility
39Cited by
3References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 31, 1978 |
| Grant date | Jan 8, 1980 |
| Priority date | — |
| Expiry date | Aug 31, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S528/904
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The wetting rates of polyurethane hydrogels comprising lightly crosslinked polymers of isocyanate terminated prepolymers which are the reaction product of (i) poly(alkyleneoxy) polyols with (ii) organic diisocyanates that has been lightly crosslinked with (iii) water or an organic polyamine are enhanced by treating the surface of the solid hydrogel with certain ketones, alcohols, organic amines, aromatic hydrocarbons or aqueous alkali metal hydroxide solutions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.