氢氧化镁填充的VAMAC无卤低烟阻燃电缆胶料的配方与性能

Halogenless,Low fume and Flame retardant VAMAC Cable Compound Filled with Magnesium Hydroxide

在乙烯－丙烯酸酯橡胶（ＶＡＭＡＣ）无卤低烟阻燃电缆胶料配合中，主要填料氢氧化镁及其表面处理剂硬脂酸锌的用量是关键，硫化体系也较重要。胶料优化配方为：ＶＡＭＡＣ１００；２，５－二甲基－２，５－双（叔丁基过氧）己烷３．０～３．３；Ｎ，Ｎ′－间亚苯基双马来酰亚胺和三（甲基丙烯酸三羟甲基）丙酯０．８～１．０。硬脂酸锌处理过的陶土＋ＬＥＥ白滑粉５０～６０；加工助剂１２～１４；硬脂酸锌１．２～１．４；氢氧化镁４３～４７；其它６～７。胶料阻燃、低烟和物理机械性能良好，成品电缆通过ＧＢ１２６６６—９０燃烧试验。

The loading level of the main filler,magnesium hydroxide and its surface treating agent,zinc stearate is the most important in the halogenless,low fume and flame retardant VAMAC cable compound,and a special attention should be paid to the curing system.The optimized compounding formula is as follows:VAMAC 100;2,5 dimethyl 2,5 bis(tert butyl perox) hexane 3.0～3.3;N,N′ m phenylene bismaleimide and trimethylol propane trimethacrylate 0.8～1.0;clay treated with zinc stearate+LEE slippery white powder 50～60;processing aids 12～14;zinc stearate 1.2～1.4;magnesium hydroxide 43～47;others 6～7.The resultant compound features flame retardant,low fume and good physical properties.The finished cable has passed GB12666—90 Burning Test and is in accordance with the requirements in IEC 502(1994)