CHEN Yang， LIU Chao， ZHENG Shuilin
（School of Chemical and Environmental Engineering， China University of Mining and Technology （Beijing）， Beijing 100083， China）
Abstract： To prepare the composite flame retardant fillers calcium carbonate coated with magnesium hydroxide， the precipitation method of calcium hydroxide was adopted. The prepared composite flame retardant fillers were used to fill ethylene -vinyl acetate copolymer （EVA） cable materials. The flame retardant performance and mechanical properties of the composite flame retardant fillers were researched. The microstructure and composite situation of the composite flame retardant fillers were respectively characterized and analyzed by SEM and EDS. The results show that the optimal process conditions are that the temperature is 85 ℃， the reaction time is 2 h and the mass of Ca（OH）2 is 24 g when the mass of MgSO4 is 36 g. The magnesium hydroxide -ground calcium carbonate composite flame retardant fillers with microstructure uniform are successfully prepared.
Keywords: magnesium hydroxide; ground calcium carbonate; flame retardant filler; preparation
中图分类号：TB332 文献标志码：A
文章编号：1008-5548（2015）04-0089-04
DOI:10.13732/j.issn.1008-5548.2015.04.020
收稿日期：2014-10-20， 修回日期：2014-11-03，在线出版时间：2015-08-26。
第一作者简介：陈洋（1991—），男，硕士研究生，研究方向为非金属矿物材料。E-mail：061406_chenyang@163.com。
通信作者简介：郑水林（1956—），男，教授，博士生导师，研究方向为非金属矿深加工与非金属矿物材料、粉体加工技术。E -mail：shuilinzh@sina.com。
