What is dispersant?
Lencolo
2022-07-19
604
Dispersant is a kind of interfacial active agent which has both lipophilic and hydrophilic properties in the molecule. Can uniformly disperse those inorganic, organic pigment solid and liquid particles that are difficult to dissolve in liquid, but also to prevent the sedimentation and condensation of particles, the formation of stable suspension required amphiphilic reagent, is a very important additive in coating application, the quality of dispersant can directly affect the yield of the final product.
Dispersant is commonly referred to as an interface active substance that can improve the stability of coating dispersion system. Dispersant added in the coating can be absorbed on the surface of the pigment pulverized into fine particles, constitute an adsorption layer, charge repulsion and steric resistance effect, prevent the dispersion of pigment particles to form harmful flocculation, can keep the dispersion system in a stable suspension state. Generally speaking, the larger the molecular weight of dispersant is, the thicker adsorption layer can be formed. Dispersant if used properly, can not only prevent pigment precipitation, make the paint with good storage stability, and can improve the flow property, prevent pigment floating color hair flower, get a uniform color coating, enhance paint tinting strength, hiding power, increase the luster of the film, also can lower the viscosity of the paste, and increase the grinding paste, pigment content in improve the grinding efficiency, Achieve the effect of saving manpower and energy.
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