Polyether polyol formulations for hard CFC replacement by water blowing in rigid polyurethane foams
US4943597A · kind A · utility
10Cited by
3References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 7, 1988 |
| Grant date | Jul 24, 1990 |
| Priority date | — |
| Expiry date | Dec 7, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2375/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Rigid closed-cell polyisocyanate-based foams are prepared by the reaction of polyisocyanate with a polyol composition having an average hydroxyl number of about 100 to about 500 and comprising at least one polyether polyol containing four or more active hydrogens and having a hydroxyl number of from about 50 to about 500. The blowing of the foam is essentially with carbon dioxide generated from the reaction of water with polyisocyanate so as to provide foams of the desired density containing at least 40 mole percent carbon dioxide in their cells.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.