Defoamer Active, Manufacturing Method Thereof, and Defoaming Formulation

摘要

This invention relates to a defoamer active. The defoamer active may include hydrophobized aluminum silicate particles. Aluminum silicate particles having a surface pH of at least about 9.6 and a BET surface area of less than about 150 m2/g are treated with a hydrophobilizing agent to provide the hydrophobized aluminum silicate particles. The defoamer actives are useful to prepare defoamer compositions which are useful for preventing or reducing foam in various aqueous systems.