精细与专用化学品

以五氧化二磷、磷酸、环氧乙烷或环氧丙烷为原料，四氯化钛为催化剂，合成了1种新型低聚磷酸酯阻燃剂，并研究了该阻燃剂的阻燃性能和磷(P)迁移率。实验结果表明，以环氧乙烷为原料，所得最优阻燃剂的P含量最高为14.3%,酸值0.19mgKOH/g,羟值489mgKOH/g,极限氧指数(LOI)最高为25.4%,此时P迁移率最低。以环氧丙烷为原料时，所得最优阻燃剂的P含量最高为13.7%,酸值0.2mgKOH/g,羟值520mgKOH/g, LOI最高为25.2%,此时P迁移率最低。

A kind of new oligophosphate flame retardant was synthesized by a modified preparation method using phosphorus pentoxide, phosphoric acid, ethylene oxide and propylene oxide as raw materials and titanium tetrachloride as catalyst, and the flame retardant performance and P migration rate of this flame retardant were studied.The experimental results showed that when ethylene oxide was used as the raw material, the phosphorus content of the optimal flame retardant obtained was the highest at 14.3%,the acid value was 0.19mgKOH/g, the hydroxyl value was 489mgKOH/g, and the LOI was the highest at 25.4%,at which point the P migration rate was the lowest.When propylene oxide was used as the raw material, the resulting optimal flame retardant had a maximum phosphorus content of 13.7%,an acid value of 0.2mgKOH/g, a hydroxyl value of 520mgKOH/g, and a maximum LOI of 25.2%,at which point the P migration rate was the lowest.