Method for making poly(butylene oxide) polyols
US9708448B2 · kind B2 · utility
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1References
6Claims
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Key dates
| Filing date | Aug 16, 2014 |
| Grant date | Jul 18, 2017 |
| Priority date | — |
| Expiry date | Aug 16, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G65/2696
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
1,2-butylene oxide is homopolymerized or randomly copolymerized in the presence of a double metal cyanide catalyst such as a zinc hexacyanocobaltate catalyst complex. The polymers unexpectedly contain significant amounts of monofunctional impurities, which can be partially controlled through selection of polymerization conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.