Polyurethane release agent is divided into external release agent and internal release agent. At present, the vast majority of domestic polyurethane products processing plants use foreign release agents. Since the 1970s, after the internal release agent and hydroxyperoxide were first introduced, some other companies have also produced various internal release agents. As the internal release agent appears as a component of the foaming formula, its use will change the foaming formula and affect the physical properties of the products, the domestic and foreign polyurethane industry is still widely using the external release agent, constantly developing new products and gradually expanding the scope of use, as well as developing new internal release agent products.