Production method of poly(carbonate-ether)polyol
US10494477B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 10, 2015 |
| Grant date | Dec 3, 2019 |
| Priority date | — |
| Expiry date | Mar 17, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L69/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
This invention provides a production method of a poly(carbonate-ether)polyol, comprising the steps of: performing a reaction between a carboxylic acid and an epoxide to obtain an intermediate, wherein the carboxylic acid has an acidity constant of 0.2 to 4; and performing a polymerization reaction between the intermediate and carbon dioxide under the action of a rare earth doped double metal cyanide of Zn3[Co(CN)6]2 to obtain a poly(carbonate-ether)polyol. In the production method of the poly(carbonate-ether)polyol provided by this invention, a carboxylic acid having a suitable acidity constant is used as an initiator and an epoxide is firstly activated by using the carboxylic acid, and polyethers having different molecular weights generated in situ after activation are used as chain transfer agents to be involved in the polymerization reaction between carbon dioxide and the epoxide under the action of a rare earth doped double metal cyanide Zn3[Co(CN)6]2. This production method of the poly(carbonate-ether)polyol has a shorter reaction time, and the content of a byproduct propylene carbonate in the product is relatively low.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.