Bimetallic zinc complex and process of producing polycarbonate using the same as polymerization catalyst
US7244805B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 25, 2005 |
| Grant date | Jul 17, 2007 |
| Priority date | — |
| Expiry date | Jul 16, 2025 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F3/003
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Provided are a bimetallic zinc complex and a method of producing polycarbonate, including polymerizing an epoxy compound and carbon dioxide using the bimetallic zinc complex. The bimetallic zinc complex according to the present invention has a distance between zinc-zinc atoms, which is maintained in a limited range regardless of its concentration in a reaction medium for the polymerization. Thus, the bimetallic zinc complex can have a polymerization activity even at a high ratio of monomer/catalyst, thereby reducing a catalyst amount to be used, which is economically advantageous. Further, the bimetallic zinc complex can produce a high molecular weight polycarbonate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.