Highly active double metal cyanide catalysts and epoxide polymerization
US5536883A · kind A · utility
60Cited by
11References
14Claims
0Family size
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Inventor
Key dates
| Filing date | May 30, 1995 |
| Grant date | Jul 16, 1996 |
| Priority date | — |
| Expiry date | May 30, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2531/96
- 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 greater than about 500. A method of preparing the catalysts is also disclosed. The catalysts are easy to prepare, have exceptional activity, and are readily removed, if desired, from polymer products. The catalysts are used for polymerizing epoxides.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.