复合型氢氧化镁阻燃剂的改性研究

采用石灰乳法制备氢氧化镁阻燃剂,对混合碱用量、溶剂总量、水/醇比和反应时间进行考察,并采用三种典型的改性剂———磷酸三苯酯、双咪唑啉、双子磺酸钠对氢氧化镁阻燃剂进行改性。结果表明,Mg（OH）2的最佳制备条件为：氯化镁与混合碱的摩尔比为1∶2.2,溶剂的总量为2 100 mL,水/醇的体积比为4∶1,反应时间为30 min。采用晶须改性剂磷酸三苯酯时,温度在80℃,改性时间4 h,添加量2%（质量百分比）时,活化指数较好;采用双咪唑啉、双子磺酸钠时,温度在40℃,改性时间2 h,添加量4%（质量百分比）时,活化指数较好。

Study on the property modification of compound magnesium hydroxide flame retardant

The method of lime milk preparation of magnesium hydroxide flame retardant, the amount of mixed-alkali, solvents, water/alcohol ratio and reaction time to determine. Three typical modification agent triphenyl phosphate, bis-imidazoline, gemini sulfonic acid sodium salt on the modification of magnesium hydroxide flame retardant. The results showed that the optimum prepartion conditions were as follows：the mole ratio of magnesium chloride and mixed alkali solvent of 1 ： 2.2 ,the total volume 2 100 mL,water/al- cohol 4： 1, reaction time 30 min. When whiskers modifier triphenyl phosphate, temperature of 80 ℃ ,4 h, add 2% （quality）,the activation index is good;bis-imidazoline,while gemini sulfonic acid sodium salt, modified is 40 ℃ ,2 h, add 4% （quality）, the activation index is better.