Continuous process for making polyether polyols having high polymerized ethylene oxide content using a double metal cyanide catalyst complex and a magnesium, group 3—group 15 metal or lanthanide series metal compound
US10160830B2 · kind B2 · utility
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Key dates
| Filing date | Jun 15, 2016 |
| Grant date | Dec 25, 2018 |
| Priority date | — |
| Expiry date | Jun 15, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2650/58
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An alkylene oxide mixture containing greater than 50% by weight ethylene oxide is continuously polymerized in the presence of a double metal cyanide polymerization catalyst and certain magnesium, Group 3-Group 15 metal or lanthanide series metal compounds. The presence of the magnesium, Group 3-Group 15 metal or lanthanide series metal compound permits the polymerization to be performed continuously without premature deactivation of the double metal cyanide catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.