Defoaming agent is generally composed of a variety of components with different functions, namely, the main anti-foaming agent, auxiliary anti-foaming agent, carrier, emulsifier or development agent, stabilizer or coordination agent.

    (1) Main antifoam agent: the main active components are usually insoluble granular substances, such as hydrophobic silica treated by silicone oil, fatty amines, paraffin wax, etc.

    (2) Auxiliary defoaming agent: it is an active component that plays a regulatory role, improves the surface effect of the main defoaming agent, and has a synergistic effect on the main defoaming agent.Such as fatty alcohol, fatty acid ester.

    (3) carrier: water is the most convenient and economical carrier to support the main and auxiliary defoaming agent

    (4) emulsifier and developing agent: it is to make the active component of defoaming agent disperse immediately in the foaming medium, and contact the surface more quickly, so as to improve the development efficiency of defoaming agent.Commonly used emulsifiers are organic esters and ethyl oxidation products.

    (5) stabilizer and coordination agent: it is an additive to improve the stability and storage time of defoaming agent. Stabilizer of water-based defoaming agent is often a preservative to prevent the product from being destroyed by bacteria in the storage process.Coordination agent commonly used oleic acid, adipic alcohol, etc.