Coating additives are an important component of coating products. They can improve the production process, improve product performance, improve coating construction performance, and play a key role in improving the performance of coatings and coating films. As people With the increasing emphasis on environmental protection, water-based coatings have begun to develop rapidly, and water-based coating additives have received more and more attention from people in the industry. So what should we pay attention to when selecting additives for water-based coatings?

Wetting and dispersing agent
When solid and liquid come into contact, the original solid-gas interface disappears and a new solid-liquid interface is formed. This phenomenon is called wetting. When a liquid is used to moisten the pigment filler and penetrate it into the agglomerates and aggregates of the pigment filler, if a small amount of surfactant is added to the liquid, the wetting and penetration will be easier. This is the wetting effect. Surfactants that wet or accelerate the wetting of pigment fillers are called wetting agents. The liquid in water-based paint is water.
The surface properties of pigments and fillers, the type and amount of wetting and dispersing agents, and the efficiency of dispersing equipment are the main factors affecting dispersion.
The stability or coagulation of suspended dispersions of pigments and fillers depends on the forces, repulsions and attractions between particles. Repulsive force is the main factor of stability, and attractive force is the main factor of agglomeration.