Preparation of amino polyols
US4499264A · kind A · utility
3Cited by
1References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 27, 1983 |
| Grant date | Feb 12, 1985 |
| Priority date | — |
| Expiry date | Jun 27, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G65/30
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An improved method is disclosed for producing amino polyols useful in preparing polyurethane foams. The improvement concerns charging ammonia, a primary amine or a secondary amine to the reaction vessel at the end of the oxide digestion step. The amine or ammonia scavenges the residual oxide and the resulting alkanol amine becomes one of the components of the polyol mixture. Alkanol amines are beneficial components of urethane polyols. In prior art industrial practice, residual oxide is vented to a scrubber system and then stripped to a low concentration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.