Yield optimization of polycarbonate polyols
US9181392B2 · kind B2 · utility
0Cited by
3References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 13, 2013 |
| Grant date | Nov 10, 2015 |
| Priority date | — |
| Expiry date | Mar 13, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G64/0208
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Embodiments of the invention provide for methods of producing a polycarbonate polyol. The method includes charging a vessel with butanediol, charging the vessel with a polymerization catalyst, and adding to the vessel dimethyl carbonate at a rate of at least 2.0 g of DMC per minute per kg of BDO to produce polycarbonate polyol at a polycarbonate polyol yield of at least 80% of a theoretical yield.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.