Preparation method for polyol and application of polyol in making polyurethane
US11535708B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 21, 2020 |
| Grant date | Dec 27, 2022 |
| Priority date | — |
| Expiry date | May 8, 2041 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2219/00984
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method for preparing a polyol comprises the following steps of: (1) dissolving 2,3 -epoxybutane and an acid catalyst in an inert solvent to obtain a solution A; dissolving triethylene glycol in an inert solvent to obtain a solution B; and dissolving epoxy vegetable oil in an inert solvent to obtain a solution C; (2) respectively and simultaneously pumping the solutions A and B into a first micromixer for mixing; (3) pumping the solution C and an effluent of the first microreactor into a second micromixer for mixing while carrying out step (2); and (4) dissolving the vegetable oil polyol in an inert solvent to obtain a solution D; dissolving epoxypropane and an alkaline catalyst in an inert solvent to obtain a solution E; and pumping the solution D and the solution E into a tank reactor for reaction, thereby obtaining the polyol.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.