Polyether defoamer is a mixture of polyether polyols of different categories obtained by special process under the action of catalyst with different starting agent and epoxides such as ethylene oxide, propylene oxide and butane oxide. Because it has both hydrophilic and hydrophobic groups in its molecular structure, it can destroy the double electron layer in the foam and has the defoaming ability.

According to the characteristics of different industries, different starting agents and epoxides are selected in different order, and the corresponding grafting modification is carried out according to its particularity when necessary, so as to meet the requirements of the industry for foam suppression performance. This kind of product has the characteristics of low volatility, strong chemical stability, acid and alkali resistance, foam suppression time, and a wide range of applications.