The materials of wetting agents mainly include the following categories:
Surfactants: Wetting agents are mainly composed of surfactants, which are usually composed of hydrophilic groups and lipophilic groups. When in contact with the solid surface, the lipophilic group adheres to the solid surface, and the hydrophilic group extends outward into the liquid, so that the liquid forms a continuous phase on the solid surface, thereby achieving wetting. Common surfactants include anionic surfactants (such as sulfates, sulfonates, phosphates, carboxylates, etc.) and non-ionic surfactants (such as polyoxyethylene ethers, polyoxyethylene esters, polyoxyethylene amines, polyoxyethylene siloxanes, etc.).
Special materials: Some wetting agents use special materials, such as silanol nonionic surfactants, which have low molecular weight, multi-hydrophobic groups and umbrella-shaped symmetrical structures, extremely low dynamic and static surface tensions, stable chemical properties, and good acid and alkali resistance. In addition, there are polyether-modified siloxane wetting agents, which are based on the twin structure of siloxane, have good defoaming and anti-foaming effects, and are suitable for a variety of coatings.
Application scenarios: Wetting agents are widely used in coatings, inks, architectural coatings, water-based wood primers, water-based plastic paints and other fields. They can significantly reduce the surface tension of the coating and improve the wetting effect and fluidity of the coating.
By understanding the material and type of the wetting agent, you can better choose the wetting agent suitable for a specific application scenario, thereby improving its use effect and efficiency.