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.

    3 silicone defoaming agent active components and properties:

    Polysiloxane,Silicones (Polysiloxane,Silicones oil) is the main component of silicone defoaming agent. Polysiloxane is mainly composed of linear Polysiloxane (Polysiloxane,Silicones oil) which can remain liquid at room temperature.

    Polydimethylsiloxane: The molecular formula is as follows:

    Me3SiO(Me2SiO)nSiMe3

    (2) the performance of silicone defoaming agent: silicone defoaming agent has three functions of bubble breaking, defoaming and foam suppression.

    (3) the characteristics of silicone defoaming agent

    [Appearance] White viscous emulsion

    [PH] 6-8

    [Water dilution] 0.5-5.0% dilution of foaming liquid

    Volatile a nonvolatile substance

    Stability 3000 RPM /20 min no layering

    Ionic properties Nonionic type

    Temperature resistance: no demulsification, no oil drift, no stratification