Polymerization of ethylene oxide using metal cyanide catalysts
US6642423B2 · kind B2 · utility
6Cited by
6References
9Claims
0Family size
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Key dates
| Filing date | Apr 24, 2002 |
| Grant date | Nov 4, 2003 |
| Priority date | — |
| Expiry date | Apr 24, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J37/0223
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Ethoxylations of various initiator compounds are performed in the presence of metal cyanide catalysts. The catalysts surprisingly form a wide variety of polyether products that in most cases contain only small amounts of high molecular weight poly(ethylene oxide).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.