Polyethylene of raised temperature resistance (PE-RT) master batch and preparation method thereof

The invention relates to a polyethylene of raised temperature resistance (PE-RT) master batch and a preparation method thereof. At present, petroleum chemical enterprises in China do not produce polyethylene of raised temperature resistance (PE-RT) materials, so matched master batches need to be imported, but the price is high. The invention has the technical scheme that the PE-RT master batch comprises 20 to 30 percent of substrate rein, 3 to 5 percent of nanometer montmorillonite, 7 to 15 percent of dispersing agents, 0.3 to 1 percent of resistance cross linking agents, 0.5 to 2 percent of polysiloxane organic silicon surface active agents, 1 to 3 percent of antioxidants, 1 to 3 percent of light stabilizers and 20 to 70 percents of pigment, wherein the resistance cross linking agents are dimethyl sulfoxide, dimethylamine or dimethylformamide, and the dispersing agents are compounds of low molecular polyethlene wax or ethylene-vinyl acetate wax and fluoropolymers. After the PE-RT is proportionally mixed, PE-RT pipelines in various colors can be manufactured, and the improvement of the mechanical property of the PE-RT pipelines instead of reduction is ensured.