氢氧化铝镁复合阻燃剂制备技术研究  

Study on Preparation of Aluminum Magnesium Hydroxide Composite Flame Retardant

作　　者：刘磊[1] 王建立 

机构地区：[1]中国铝业公司,北京100082 [2]中国铝业郑州研究院,郑州450041

出　　处：《硅酸盐通报》2014年第1期225-230,共6页Bulletin of the Chinese Ceramic Society

摘　　要：超细氢氧化铝是一种重要的无机阻燃填料,但由于其分解温度低而影响使用性能。根据晶体成核与生长理论,以氢氧化铝为核材,以镁盐和氢氧化钠为原料,通过非均相成核方式使氢氧化镁沉积在氢氧化铝表面,形成氢氧化镁包覆氢氧化铝的核-壳结构,制备的氢氧化铝镁复合阻燃剂兼有氢氧化铝和氢氧化镁的优点。通过研究温度、加料方式以及复合阻燃剂中氢氧化铝与氢氧化镁理化质量比等对复合阻燃剂热稳定性的影响,得到复合阻燃剂优化的制备工艺条件。制备的铝镁复合阻燃剂,初始热分解温度可达到260℃,进一步提高了氢氧化铝的阻燃性能,有机高聚物填充铝镁复合阻燃剂后其氧指数可达到33,主要力学性能指标均优于国家标准。The super-fine aluminum hydroxide is important inorganic flame retardant filler. However, its lower decomposing temperature restricts the application performance. According to the theory of crystal nucleation and growth, magnesium hydroxide was deposited on the surface of ATH by heterogeneous precipitation and the core-shell structure where aluminum hydroxide was coated with magnesium hydroxide was formed, then the composite flame retardant with both advantages of magnesium hydroxide and aluminum hydroxide was produced. The effect of synthetical temperature, the mass ratio of aluminum hydroxide to magnesium hydroxide in composite material and the addition manner of reactive materials on performance of the composite flame retardant was studied in this paper. The optimized process parameters were identifies by studying the effect of different factors on its thermo stability. The initial thermodecomposed temperature of the composite flame retardant is increased to 260 ℃ and its flame retarding performance is improved. The oxygen index of the high polymer filtered with it can reach 33 and the main mechanical performance outweighs the demand value of national standards.

关 键 词：铝镁复合阻燃剂 制备 非均相沉淀 热稳定性 

分 类 号：TQ174[化学工程—陶瓷工业]