Polyurethane (PU), as an important polymer material, is widely used in various fields such as furniture, construction, automobiles, shoe materials, coatings, etc. However, in the production process of polyurethane, a large number of foam are often produced due to factors such as intense reaction of raw materials, shear force generated by stirring and surfactant in the system. These foam not only affect production efficiency and product quality, but also may cause damage to equipment. Therefore, polyurethane defoamers have emerged as a key additive to solve this problem.

Polyurethane defoamer is a chemical additive specially designed for polyurethane system. Its main function is to quickly destroy the structure of foam and inhibit the regeneration of foam, so as to ensure the smooth production of polyurethane and the good quality of the final product. These defoamers usually have the characteristics of high efficiency, stability, and easy dispersion, and can maintain good compatibility with polyurethane raw materials and additives.