Preparation method of chlorinated polyethylene with high fluidity and high thermal stability

The invention relates to the technical field of high polymer materials, in particular to a preparation method of chlorinated polyethylene with high fluidity and high thermal stability, which comprises the following steps: adding high-density polyethylene, a dispersing agent and an anti-sticking agent into a hydrochloric acid solution in a stirring state to prepare a high-density polyethylene suspension solution; chlorine is introduced into the suspension solution in two stages for a chlorination reaction, the reaction temperature is 30-130 DEG C, the introduction amount of the chlorine is 1-1.1 times of the weight of the high-density polyethylene, the reaction time is 4-5 hours, a chlorinated product is separated, and then washing, dehydration and drying are performed to obtain chlorinated polyethylene; and coating the obtained chlorinated polyethylene in a homogenizing mixing bin according to a coating formula to obtain a chlorinated polyethylene finished product. Therefore, the chlorination product and the