Wetting agent is a surfactant that reduces surface energy to make solid materials more easily wetted. It is composed of hydrophilic and oleophilic groups. When in contact with a solid surface, the oleophilic group adheres to the solid surface, while the hydrophilic group extends outward into the liquid, forming a continuous phase and achieving wetting effect. Wetting agents play a crucial role in coatings. Its main function is to reduce the surface tension of pigments, so that pigment particles can be uniformly dispersed in coatings, thereby improving the coloring degree, covering power, transparency, viscosity and other properties of coatings.

In the process of coating preparation, wetting agents help to disperse and crush pigment particles in grinding equipment, thereby improving grinding efficiency and shortening production cycles. Wetting agents can also improve the wetting and spreading properties of coatings on substrates, making the coating more uniform and smooth. This helps to improve the adhesion, glossiness, and weather resistance of the coating.

During the coating application process, wetting agents can prevent defects such as shrinkage and fish eyes caused by uneven surface tension, and improve the appearance quality of the coating film. Wetting agents can to some extent adjust the viscosity of coatings, making them more suitable for application. Appropriate viscosity helps ensure the fluidity and brushing performance of the coating. Wetting agents can also prevent delamination, precipitation, and other phenomena in coatings during long-term storage, improving the stability and service life of coatings.

In summary, wetting agents play a crucial role in coatings, as they not only improve the preparation and application process of coatings, but also enhance the performance and quality of coatings. Therefore, it is very important to select and use wetting agents reasonably in coating formulations.