| abstract |
The invention discloses a boric ester derivative expansion flame retardant and a preparation method thereof. The name of the boronate derivative is 1,3,5-tri-{4,6-di-[([1,3,2]dioxaborolane-2-oxo)-ethoxy]- 1,3,5‑triazine‑2‑oxo}benzene. During preparation, phloroglucinol and N,N-diisopropylethylamine are added to the tetrahydrofuran solution, added dropwise to the tetrahydrofuran solution of cyanuric chloride, reacted and filtered; the intermediate product 1 is purified; the ethylene glycol and toluene Stir and mix, add boric acid, continue to heat up, stir and reflux, remove toluene, and dry in vacuo to obtain intermediate product 2; under nitrogen protection, dissolve intermediate product 2 in tetrahydrofuran solution, then add sodium hydroxide, and add dissolved The tetrahydrofuran solution of the intermediate product 1 was reacted; suction filtration, the liquid phase was spin-dried, and separated to obtain the intumescent flame retardant of the borate ester derivative. The borate derivative of the present invention can be used as an excellent environment-friendly organic flame retardant. |