Hydrophilic polyurethane/polyurea sponge
US4638017A · kind A · utility
41Cited by
10References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 9, 1985 |
| Grant date | Jan 20, 1987 |
| Priority date | — |
| Expiry date | Dec 9, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2110/0083
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A water-absorbing sponge comprises at least one of a 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.