Soluble epoxide/carbon dioxide copolymerization catalysts
US4783445A · kind A · utility
14Cited by
3References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 14, 1987 |
| Grant date | Nov 8, 1988 |
| Priority date | — |
| Expiry date | Dec 14, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2231/14
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Catalysts which are soluble in a variety of solvents are prepared by reacting zinc compounds with anhydrides in the presence of an alcohol or by reacting zinc salts with a monoester of a dicarboxylic acid. These catalysts can be added as a solution to a mixture of epoxides and carbon dioxide to prepare polyalkylene carbonates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.