Types of silicone defoamers
     1. Water emulsion type defoamer      With polydimethylsiloxane (dimethyl silicone oil) as the main body, and white carbon black compound, it is prepared into O/W type water emulsion defoaming with various concentrations under the action of surfactant (emulsifier) (Suitable for water-based defoaming occasions) Or make high-concentration silicone paste, use the smearing method or temporarily dilute it before use.      2. Oil system defoamer      The silicone oil is carried by the solvent and dispersed in the blasting liquid. When the solvent diffuses, the silicone oil or microdroplets play a defoaming effect (generally high and low viscosity silicone oils are blended) or made into a silicone oil/mineral oil dispersion. The petroleum industry needs a large amount of silicone surfactants as demulsifiers.      3. Solid powder defoamer      Containing 2%~5% organic silicon defoaming ingredients and 98%~50% mass fraction of powdery solid carrier.      4. Defoaming stick      Silicone oil, sodium sulfonate and wax preparations.      5. Self-emulsifying and self-dispersing defoamer      The silicone surfactant copolymerized with polysiloxane and polyether, and the introduction of hydrophilic groups (polyether modified silicone oil) into the molecular chain of polysiloxane can significantly improve the dispersibility of silicone in water, or become self-contained. Emulsified form, becomes a special kind of defoaming agent, defoaming above the cloud point, suitable for defoaming such as high temperature and high pressure jet dyeing.