Commonly used defoamers can be divided into silicone (resin), surfactants, paraffins and mineral oils according to their components.
- Silicon (resin)
Silicone resin defoamer, also known as emulsion type defoamer, is used by emulsifying and dispersing silicone resin in water with an emulsifier (surfactant) and then adding it to wastewater. Silica fine powder is another silicon defoamer with better defoaming effect.
- Surfactants
This type of defoamer is actually an emulsifier, which uses the dispersing effect of a surfactant to keep the foam-forming substance dispersed in a stable emulsified state in water, thereby avoiding the formation of foam.
- Paraffins
Paraffinic defoamer is a defoamer made by emulsifying and dispersing paraffinic wax or its derivatives with an emulsifier. Its use is similar to that of surfactant-based emulsified defoamers.
- Mineral oil
Mineral oil is the main defoaming ingredient. In order to improve the effect, sometimes metal soap, silicone oil, silicon dioxide and other substances are mixed together. In addition, various surfactants can sometimes be added to make the mineral oil easily spread to the surface of the foaming liquid, or to evenly disperse the metal soap in the mineral oil.
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