Copolymerization of propylene oxide and carbon dioxide and homopolymerization of propylene oxide
US8093351B2 · kind B2 · utility
5Cited by
16References
31Claims
0Family size
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Key dates
| Filing date | Aug 10, 2007 |
| Grant date | Jan 10, 2012 |
| Priority date | — |
| Expiry date | Jan 23, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G65/2663
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Copolymers of propylene oxide and carbon dioxide and homopolymers of propylene oxide are made using two dimensional double metal cyanide complexes having the formula Co[M(CN)4] or hydrated or partially dehydrated form thereof. There is no propylene carbonate by product in the copolymerization.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.