Process for preparing metal cyanide complex catalyst
US5158922A · kind A · utility
284Cited by
24References
20Claims
0Family size
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Key dates
| Filing date | Feb 4, 1992 |
| Grant date | Oct 27, 1992 |
| Priority date | — |
| Expiry date | Feb 4, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G65/30
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Highly active double metal cyanide complex catalysts suitable for use in ring-opening polymerization reactions may be prepared in filterable form by controlling the order of reagent addition, the temperature of the reaction medium, and the stoichiometric ratio of the reactants.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.