Purification process for polyether-carbonate polyols
US12146027B2 · kind B2 · utility
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Key dates
| Filing date | Jan 6, 2020 |
| Grant date | Nov 19, 2024 |
| Priority date | — |
| Expiry date | Sep 25, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G65/30
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Alkylene carbonates are removed from polyether-carbonate polymers by contacting the polyether-carbonate with an absorbent at a temperature of 30 to 150° C. The process is effective and inexpensive. The purified polyether-carbonate is useful for making polyurethanes as well as in many other applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.