Thermolysis-mediated process for manufacturing chromenes intended for the preparation of thermosetting resins
US11591343B2 · kind B2 · utility
2Cited by
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14Claims
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Key dates
| Filing date | Jul 23, 2020 |
| Grant date | Feb 28, 2023 |
| Priority date | — |
| Expiry date | Jul 23, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D413/04
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for manufacturing chromenes which are intended for the preparation of thermosetting resins, includes transforming an aromatic propargyl ether of general formula (I) into a chromene by flash vacuum thermolysis, at a temperature of between 300 and 600° C., at a pressure of between 4 and 10,000 Pa. It also concerns a process for preparing a material made of thermoset resin, including successively: a) implementation of the above process; b) polymerization of the reaction product obtained in a) so as to obtain the material made of thermoset resin; c) recovery of the material made of thermoset resin obtained in b).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.