Amide type organic phosphine-nitrogen flame retardant compound and preparation method thereof

The invention relates to an amide type organic phosphine-nitrogen flame retardant compound and a preparation method thereof, the structure of the compound is shown in the following formula: the preparation method comprises the following steps: in an organic solvent, reacting melamine sodium salt with 2-2.2 times of mole of phenyl phosphonic dichloride, and purifying to obtain phenyl phosphonic dichloride melamine; the compound disclosed by the invention is stable in structure, high in flame-retardant efficiency, good in expansion charring property and wide in application range, and can be used as a flame retardant of materials such as epoxy resin, unsaturated polyester resin, polyester resin, polyolefin, polyacrylate, polyacrylamide, polyvinyl alcohol and the like. The process is simple, equipment investment is low, and industrial production is easy to realize. 本发明涉及一种酰胺型有机膦氮阻燃剂化合物及其制备方法，该化合物的结构如下式所示：制备方法为：在有机溶剂中，三聚氰胺钠盐与2～2.2倍摩尔的苯基膦酰二氯反应，经纯化处理，得苯基膦酰二三聚氰胺。本发明化合物结构稳定、阻燃效能高、膨胀成炭性好，应用范围广，可以用作环氧树脂、不饱和聚酯树脂、聚酯树脂、聚烯烃