Aliphatic polycarbonate quench method
US9012675B2 · kind B2 · utility
5Cited by
6References
53Claims
0Family size
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Key dates
| Filing date | Sep 17, 2009 |
| Grant date | Apr 21, 2015 |
| Priority date | — |
| Expiry date | Jun 12, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G64/406
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present disclosure is directed to, in part, an aliphatic polycarbonate polymerization reaction initiated by combining an epoxide with carbon dioxide in the presence of a catalytic transition metal-ligand complex to form a reaction mixture, and further quenching that polymerization reaction by contacting the reaction mixture with an acid containing a non-nucleophilic anion produces a crude polymer solution with improved stability and processability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.