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以含活泼氢的多元醇为主剂、含-NCO基团的聚氨酯预聚体为固化剂、短纤维为增韧剂、二邻氯二苯胺甲烷(MOCA)为扩链剂以及碳酸钙为填料等,制备出一种可批量生产的高压缩强度和高弯折强度的环保型高速铁路用双组分道碴胶。通过单因素试验法确定了道碴胶的较佳配方范围。结果表明:当n(主剂)∶n(固化剂)=1∶1.1、w(扩链剂)>5%、w(碳酸钙)=8.0%以及w(短纤维)>0.5%时,道碴胶的力学性能相对较好;该道碴胶已成功应用于高速铁路道碴胶接的实际工程中。
The active hydrogen-containing polyol as the main agent, the -NCO group-containing polyurethane prepolymer as a curing agent, the short fiber as a toughening agent, two o-chlorodiphenylamine methane (MOCA) as a chain extender and calcium carbonate as a filler Etc., to prepare a mass production of high compressive strength and high bending strength of environmentally friendly high-speed railway with two-component ballast glue. The optimum formulation range of ballast glue was determined by single factor test. The results show that when n (main agent): n (curing agent) = 1: 1.1, w (chain extender)> 5%, w (calcium carbonate) = 8.0% and w (short fiber) The mechanical properties of ballast glue are relatively good. The ballast glue has been successfully applied in the actual project of ballast cementing of high-speed railway.