Highly active double metal cyanide catalysts
US5627120A · kind A · utility
72Cited by
4References
16Claims
0Family size
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Inventor
Key dates
| Filing date | Apr 19, 1996 |
| Grant date | May 6, 1997 |
| Priority date | — |
| Expiry date | Apr 19, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2531/845
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Highly active double metal cyanide (DMC) catalysts are disclosed. The catalysts comprise a DMC complex, and organic complexing agent, and from about 5 to about 80 wt. %, based on the amount of catalyst, of a polyether having a number average molecular weight less than about 500. The catalysts polymerize propylene oxide at a rate in excess of about 1 kg PO/g Co/min. at 100 ppm catalyst, based on the weight of finished polyether, at 105.degree. C. The catalysts, which are easy to prepare, give polyether polyols with exceptionally low unsaturation levels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.