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●Glossiness: If the gloss of the paint is to be high, the particles contained in it should not be larger than 5 microns, and the ink should not even be larger than 1 micron. Polymer dispersants can reduce the large particles formed in the paint and help the paint improve its gloss.

The dispersant has two functions: one is to speed up the depolymerization of "agglomerates" and shorten the dispersion time; the other is to delay the time for particles to reunite again and keep the particles in a dispersed state for a long time.

Coating systems: Different types of coating systems (such as water-based or solvent-based coatings) have specific requirements for the amount and type of dispersant. Pigments: Different colors and types of pigments may require specific dispersants for optimal dispersion. Some pigments have a higher settling rate or tendency to aggregate, while other colors disperse more easily.

The selection of dispersants should be based on the characteristics of the pigments to be dispersed and the performance requirements of the coating. Dispersants have a great influence on the particle size distribution, tinting strength, stability, gloss and defects of pigments. The dispersing ability of dispersants is mainly evaluated from the following aspects: viscosity reduction and viscosity stability, particle size distribution of pigment slurry, Tinting strength, color development, hue, covering rate, flocculation, gloss, surface defects, bubbling effects, compatibility with resins and additives, storage stability, etc.

The influence of molecular structure, molecular weight and distribution of dispersant Dispersants are composed of hydrophobic and hydrophilic groups.