Reactive flame retardant containing DOPO group and nitrogen heterocyclic ring and preparation method and application thereof

The invention discloses a reactive flame retardant containing DOPO (9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide) groups and nitrogen-containing heterocyclic rings as well as a preparation method and application of the reactive flame retardant, the molecular structure of the flame retardant contains the DOPO groups and the nitrogen-containing heterocyclic rings and simultaneously contains two active groups, namely phenolic hydroxyl groups and secondary amino groups, and the molecular structure of the flame retardant is shown as a formula (I) or a formula (II). The synthesis method of the bisphenol A type epoxy resin is simple, convenient to purify and high in yield, and can be well applied to preparation of the bisphenol A type epoxy resin, and the obtained modified epoxy resin cured product is good in thermal stability and has wide application prospects in the fields of home decoration construction, microelectronic packaging, ornaments and the like. 本发明公开了含DOPO基和含氮杂环的反应型阻燃剂及其制备方法和应用，所述阻燃剂分子结构中包含DOPO基团