DMC catalyzed alkoxylation of esters
US9493608B1 · kind B1 · utility
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9Claims
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Key dates
| Filing date | Dec 21, 2015 |
| Grant date | Nov 15, 2016 |
| Priority date | — |
| Expiry date | Dec 21, 2035 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G65/2663
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
This invention relates to a novel process for preparing an aliphatic hybrid ester/ether polyol. This process simultaneously transesterifies and alkoxylates a mixture of at least one ester group containing compound which is free of ether groups, and at least one or more hydroxyl group containing compound which is free of ester groups; with the proviso that the mixture has an overall hydroxyl number of less than or equal to 350; with at least one alkylene oxide; in the presence of a mixture of catalysts. The catalyst mixture comprises at least one DMC catalyst, and at least one non-alkaline transesterification catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.