Process of making an epoxide polymer using highly active double metal cyanide catalysts
US6211330A · kind A · utility
0Cited by
16References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 30, 1997 |
| Grant date | Apr 3, 2001 |
| Priority date | — |
| Expiry date | Jul 30, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G65/2663
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Improved double metal cyanide (DMC) catalysts are disclosed. The catalysts comprise a DMC compound, an organic complexing agent, from about 0.1 to about 10 wt. % of an organophosphine oxide, and optionally, a polyether. Compared with other DMC catalysts prepared in the absence of the organophosphine oxide, those of the invention have higher activity for epoxide polymerization, and they give polyols having reduced unsaturation even at high epoxide polymerization temperatures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.