Methods for forming polycarbonate ether polyols and high molecular weight polyether carbonates
US11965062B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 24, 2018 |
| Grant date | Apr 23, 2024 |
| Priority date | — |
| Expiry date | Apr 24, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G65/269
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The method of preparing the polycarbonate ether polyol or high molecular weight polyether carbonate using controlled addition of materials during polymerisation includes the steps of:mixing catalyst of formula(I), double metal cyanide (DMC) catalyst and optionally carbon dioxide and/or solvent with epoxide and optionally starter compound and/or carbon dioxide; ormixing DMC catalyst and optionally starter compound, carbon dioxide and/or solvent with epoxide and optionally carbon dioxide and/or solvent; ormixing epoxide, catalyst of formula(I), starter compound and carbon dioxide and optionally solvent; ormixing catalyst of formula (I), DMC catalyst and optionally starter compound, epoxide, carbon dioxide and/or solvent to form in each case a mixture (α); andadding one or more of starter compound, epoxide, carbon dioxide, catalyst of formula(I), DMC catalyst and/or solvent to mixture (α) to form mixture (β) comprising starter compound, epoxide, carbon dioxide, catalyst of formula(I), DMC catalyst and optionally solvent,
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.