Polyether carbonates by DMC catalysis
US9562135B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 21, 2015 |
| Grant date | Feb 7, 2017 |
| 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 process for preparation of polyether alkoxylated carbonates. These products may also be referred to as polyether polycarbonates. This process simultaneously transcarbonates and alkoxylates a mixture of one or more carbonate compounds, and one more hydroxyl group containing compounds, with at least one alkylene oxide in the presence of a mixture of catalysts. The catalyst mixture contains at least one DMC catalyst and at least one non-alkaline transesterification catalyst. This invention also relates to novel polyether polycarbonates, a process for preparing polyurethane foams from these novel polyether polycarbonates and to foams comprising these novel polyether polycarbonates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.