Do Base Coating Material Wetting Agents Improve Coloring Power?

Base coating material wetting agents have a very important effect on other basic properties of coatings, including coloring power, hiding power, flocculation, gloss.

Many people think that Base coating material wetting agents can reduce the viscosity of a coating. But of course, this is not their functional role. In fact, Base coating material wetting agents have a very important effect on other basic properties of coatings, including coloring power, hiding power, flocculation, gloss, floating color and blooming.

Principle of action of Base coating material wetting agents

Although the amount of coating agents is small, they have a great influence on the performance of coatings. Wetting and dispersion are important processes in the preparation of coatings. Due to the variety of coatings, there is a wide range of wetting and dispersing agents used. Wetting refers to the process of replacing the adsorbent on the surface of pigment, such as air and water, with resin or additives, i.e., the solid and gas interface is transformed into the solid and liquid interface; crushing refers to the mechanical force to disperse the cohesive secondary particles into fine particles close to the primary particles, constituting a suspended dispersion; stabilization refers to the formation of suspended particles in a state of dispersion without external force. Base coating material wetting agents can shorten the grinding and dispersing time, reduce the energy consumption, and ensure the coating dispersion system is in a stable state, which plays a decisive role in many properties of coatings. Wetting agents and dispersants are generally surfactants. Wetting agent is mainly to reduce the surface tension of the substance, and its relative molecular mass is small. Although the amount of coating additives is small, it has a great influence on the performance of the coating. Wetting and dispersing is an important process of coating preparation. Due to the variety of coatings, there are many different wetting and dispersing additives used.

Use of base coating material wetting agents

Dispersing agents are adsorbed on the surface of pigments to produce charge repulsion or spatial resistance to prevent harmful flocculation of pigments and keep the dispersion system in a stable state, generally with a large relative molecular mass, but currently there are also a considerable number of polymer compounds with reactive groups used as Base coating material wetting agents.

Effect of base coating material wetting agents

In the mixed pigment system, when the specific gravity and particle size of several pigments are different, the floating color and flowering will occur. It can also reduce the viscosity of the color paste, increase the content of pigments in the grinded color paste, improve the grinding efficiency, and achieve the effect of saving manpower and energy.