Hydrophilic polyurethane/polyurea sponge
US4738992A · kind A · utility
39Cited by
10References
31Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 17, 1986 |
| Grant date | Apr 19, 1988 |
| Priority date | — |
| Expiry date | Jun 17, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/652
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A water-absorbing sponge comprises at least one of a pendent sulfo-group containing polyurea and polyurethane, the polymer containing at least one sulfonate equivalent per 20,000 molecular weight units.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.