Trichloroethyl phosphate is a phosphate ester which combines phosphorus and chlorine, so it has good flame retardant and plasticizer properties for plastics and rubber products. It has been widely used as flame retardant in polyvinyl chloride, polyurethane soft, rigid foam, cellulose acetate, nitrocellulose paint, ethyl cellulose paint, flame retardant rubber and rubber at home and abroad. In the belt. The product has self-extinguishing property, weather resistance, cold resistance, antistatic property, soft handle, and the general addition amount is 5 to 10 phr. Polyurethane rigid foam flame retardant index (LOI) can reach 26. In addition, it can also be used as special pressure additive of lubricating oil, additive of gasoline paint and thermal coolant of metal magnesium, etc.