(1) Silicon (resin)
This is a silicone defoamer, also known as an emulsion defoamer, which uses an emulsifier (surfactant) to emulsify and disperse the silicone resin in water and then add it to the wastewater. Silica powder is another silicone defoamer with good defoaming effect.
(2) Surfactants
This antifoaming agent is actually an emulsifier, that is, by the dispersion of the surfactant, the foam-forming substance can be dispersed in a stable emulsified state, thereby avoiding foaming.
(3) paraffinic hydrocarbons
A paraffin is an antifoaming agent prepared by emulsifying and dispersing an alkane wax or a derivative thereof with an emulsifier. Its use effect is similar to surfactant emulsifier defoamer.
(4) Mineral oil
Mineral oil is the main defoamer ingredient. In order to improve the effect, a mixture of a metal soap, a silicone oil, a silica gel, or the like may be used together. Further, in order to allow the mineral oil to easily diffuse to the surface of the foaming liquid or to uniformly disperse the metal soap in the mineral oil, various surfactants may be added.