Dimethyl silicone oil emulsifier is made of special polyether by compounding and polymerization.In the production of silicone defoaming agent, it is used to emulsify dimethyl silicone oil.Its incomparable convenience, production without adding other emulsifiers;It has good stability and can easily emulsify silicone oil at room temperature.

    The emulsifier can reduce the surface tension between the oil phase and the water phase, so that the silicone oil can be dispersed into fine particles in water, and the emulsifier forms an adsorption film on the surface of the dispersed phase particles, preventing these particles from condensing each other, which is helpful to form a stable emulsion.

    Therefore, the choice of emulsifier is very important. The method of selection is mainly referred to the hydrophilic and oleophilic value HLB.However, due to the complexity of the added materials and the differences in the production process, the optimal compatibility of the emulsifier needs to be determined by experiment.Therefore, this process selected several commonly used silicone oil emulsifiers for screening, emulsifier type on the impact of silicone oil emulsification.

    The stable silicone oil emulsion could not be obtained by polyether modification alone.Although it has a strong ability to reduce surface tension;But the stability of the emulsion is also related to the strength of the interfacial film.The interfacial film produced by a single surfactant is not dense, its mechanical strength is not high, and it is easy to rupture.

    The structure of polysiloxane chain segment of polyether modified silicone oil is similar to that of dimethyl silicone oil, and the hydrophobic group has a good affinity with silicone oil.Moreover, when combined with Span60, the synergistic effect was fully exerted, showing the best emulsification effect.

    Dimethylsilicone oil emulsifier not only has the surface activity of modified polysiloxane, but also has special antifoaming and antifoaming efficacy, which can increase the antifoaming time of silicone antifoaming agent.It has high temperature characteristics and can be combined with polysiloxane to form high temperature defoaming agent.It is suitable for the use of the general silicone oil emulsion and the general silicone oil emulsion is difficult to be competent.