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Citation: YANG Xing-Yu, ZHOU Shao-Lin, ZHANG Li-Ping. Synthesis and Flame Retardance of N-(5,5-Dimethyl-2-oxo-1,3,2-dioxaphosphoyl) benzoylhydrazone Derivatives[J]. Chinese Journal of Applied Chemistry, ;2004, 21(8): 793-796. shu

Synthesis and Flame Retardance of N-(5,5-Dimethyl-2-oxo-1,3,2-dioxaphosphoyl) benzoylhydrazone Derivatives

1.
Department of Chemistry, Central China Normal University, Wuhan 430079

Corresponding author: YANG Xing-Yu,
Received Date: 27 September 2003
Available Online: 8 January 2004
Fund Project: 武汉市科技攻关项目(20021002052)资助课题 (20021002052)

The title compounds, 3a~3h, were synthesized from 5,5-dimethyl-2-chloro-2-oxo-1,3,2-dioxaphosphosrinane, hydrazine hydrate and substituted benzaldehydes. The structures of the compounds were confirmed by IR, ¹H NMR, MS and elemental analysis. TG and DTA analysis showed that some of the compounds e.g. 3e began to decompose at 220℃ and have certain thermal stability. They decomposed rapidly at temperature range 220~400℃. Prelimary test showed the title compounds have high flame retardance activity for alkyd resin and epoxy E-44 varnish.
- dioxaphosphorinane,
- hydrazine hydrate,
- intumescent flame retardant,
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