膨润土的活化改性与在橡胶中的应用

Activating Modification of Bentonite and Its Application in Rubber Industry

采用热处理与机械力化学改性相结合的方法活化膨润土 ,可制备橡胶补强填料。热处理能有效驱除矿物的挥发份和结合水 ,活化结构 ,保证并提高干法机械力化学表面改性效果 ,使改性剂用量在 1%以下就能获得理想指标。采用此种方法制得的膨润土替代半补强炭黑量达 30 % ,橡胶制品各项物理性能符合国家标准GB3778- 94 ;10 0 %替代高耐磨炉黑 ,橡胶力学性能满足GB318-

A combined method of thermal treatment and mechano-chemical modification of bentonite is briefly presented in this paper. The modified bentonite can be used as an intensifying stuffing of rubber. The thermal treatment can effectively eliminate volatimatter and combined water from mineral surface,and activate structure,thus,improving efficiency of chemical modification of bentonite surface. Using modified bentonite can replace 30% carbon black of half mend,the physical properties of rubber products can satisfy technical requirements of national standard of GB3778-94. The activating modified bentonite can replace 100% carbon black of high wear-resisting,the physical properties of tire rubber produced can satisfy technical requirements of national standard of GB318-98.