The solid silicone defoamer has the characteristics of good storage stability, easy transportation, and convenient use. It can be used not only for the production of non-foaming and low-foaming laundry detergents, but also for other occasions that require defoaming operations.

There are three methods for preparing the solid silicone defoamer: (1) dispersing the silicone oil directly on the surface of the solid support; (2) dispersing the silicone oil with fatty alcohols, fatty acids, fatty amides, and fatty acid esters with a lower softening point Or the materials such as paraffin are melted together, and then the melt is adhered to the surface of the solid support; (3) The silicone oil is mixed with the film-forming material, and the film-forming material is encapsulated outside the silicone oil defoaming component to form dispersed solid particles.