Various components and functions of defoamers

Defoamers are generally composed of various components with different functions, namely main antifoaming agent, auxiliary antifoaming agent, carrier, emulsifier or unfolding agent, stabilizer or coordination agent.

(1) Main anti foaming agent: The main active component, usually insoluble granular substances, such as hydrophobic silica, fatty amines, paraffin, etc. treated with silicone oil.

(2) Auxiliary defoamer: It is an active component that plays a regulatory role, improving the surface effect of the main defoamer and enhancing its effectiveness. Such as Fatty alcohol, fatty acid ester, etc.

(3) Carrier: Supports both primary and auxiliary defoamers, with water being the most convenient and economical carrier

(4) Emulsifier and unfolding agent: It is used to immediately disperse the active components of the defoamer in the foaming medium, allowing for faster and more contact with the surface, thereby improving the unfolding efficiency of the defoamer. Commonly used emulsifiers include organic esters and ethyl oxidation products.

(5) Stabilizer and compounding agent: It is an additive that improves the stability and storage time of defoamers. The stabilizer of water-based defoamers is often a preservative to prevent bacterial damage to the product during storage. Commonly used additives include oleic acid, hexanediol, etc.