Process for preparing double metal cyanide catalyzed polyols
US6884826B2 · kind B2 · utility
23Cited by
28References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 9, 2003 |
| Grant date | Apr 26, 2005 |
| Priority date | — |
| Expiry date | Jun 9, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G65/2663
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention provides a process for preparing a polyoxyalkylene polyol by polyoxyalklating a starter compound with a mixture of two different alkylene oxide monomers in which the first alkylene oxide monomer content of the mixture decreases as the content of the second alkylene oxide monomer increases over the course of the polyoxyalkylation, digesting unreacted monomers of the alkylene oxides and capping the polyol.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.