Rigid hydrophilic polyurethane foams
US5424338A · kind A · utility
7Cited by
7References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 6, 1992 |
| Grant date | Jun 13, 1995 |
| Priority date | — |
| Expiry date | Aug 6, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2110/0083
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention relates to rigid, open-celled hydrophilic polyurethane foams obtained by reacting in the presence of water as a blowing agent and a polyisocyanate with a polyhydric polyamine initiated polyether polyol. The polyether polyol is initiated with a polyhydric polyamine having three (3) to five (5) active amine hydrogens and has internal blocks of polyoxyethylene groups. The foam retains from 15 to 35 times its weight in water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.