Catalytic process for the preparation of polyalkylene carbonates
US5171830A · kind A · utility
26Cited by
7References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 16, 1991 |
| Grant date | Dec 15, 1992 |
| Priority date | — |
| Expiry date | Aug 16, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G64/305
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method for producing polyalkylene carbonates is disclosed. The polymers are prepared by reacting a diol having at least four carbons separating the hydroxyl groups with a diester of carbonic acid in the presence of a catalyst selected from tertiary amines, alkylammonium salts, pyridinium salts, and basic ion-exchange resins that contain active alkylammonium or tertiary amino groups.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.