Preparation method of polyurethane resin
US10570254B2 · kind B2 · utility
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9Claims
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Key dates
| Filing date | Oct 31, 2017 |
| Grant date | Feb 25, 2020 |
| Priority date | — |
| Expiry date | Feb 14, 2038 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2219/1296
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A preparation method of a polyurethane resin including the following steps is provided. A liquid polyamine compound is placed in a continuous reaction system, and the liquid polyamine compound is circulated in the continuous reaction system. A solid bis(cyclic carbonate) and a solid catalyst are placed in the continuous reaction system to mix the solid bis(cyclic carbonate), solid catalyst, and liquid polyamine compound to form a heterogeneous mixture. The heterogeneous mixture is heated in the continuous reaction system in a microwave manner, such that the heterogeneous mixture reacts to form a polyurethane resin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.