Process for the production of rigid foams from alkaline polyether polyols
US6762214B1 · kind B1 · utility
13Cited by
4References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 18, 2003 |
| Grant date | Jul 13, 2004 |
| Priority date | — |
| Expiry date | Mar 18, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2110/005
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to a process for the preparation of rigid foams comprising reacting a polyisocyanate component with an isocyanate-reactive component in the present of a blowing agent. Suitable isocyanate-reactive components for the presently claimed invention comprises polyether polyols having an OH number of from 200 to 800 and containing from 3 to 8 hydroxyl groups wherein the level of alkalinity present in the polyether polyol is equivalent to a hydroxide ion level of from about 0.006% to about 0.21% by weight.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.