Pigment structure and the role of dispersant

The particle size range of the pigment is very wide, generally from 0.

Pigment dispersion process

The pigment dispersion process consists of three steps: wetting, dispersing, and stabilizing: during the wetting process, the air and moisture on the surface of the pigment are replaced by the resin solution.

Why use dispersants

Dispersants play a very important role in coating production.

Improve gloss and increase leveling effect

Tests have shown that with the same formula and using different dispersants, the gloss of the paint film will be significantly different.

Prevent floating colors

Preventing floating color and blooming is one of the well-known functions of dispersing agents.

Improve tinting strength

If the pigment is well dispersed and stable, its tinting power will be significantly enhanced.

Reduce viscosity and increase pigment loading

With a suitable dispersant, the viscosity of the obtained color paste will be significantly reduced.

Prevent back roughness and increase storage stability

If an inappropriate dispersant is selected, the color paste will be coarsened or the color will change due to flocculation, which is not what everyone wants.

Improve grinding efficiency and reduce production costs

The wetting function of the wetting and dispersing agent enables the air and water on the surface of the pigment to be replaced by the liquid of the grinding medium more quickly, and at the same time enables the separation of the pigment primary particles obtained in the dispersion stage to be maintained and controlled.

To make pigments and fillers play a role in the coating system, the application and reasonable selection of dispersants are necessary.