The role of leveling agent in improving coating film

The role of leveling agent in improving coating film

Leveling agents can effectively improve the surface condition of coatings. The surface tension of leveling agents is low, which makes the coated object wet, eliminates gas molecules adsorbed on the solid surface of the coated object early, and can also reduce the surface tension between the coating and the substrate, thereby improving the wettability of the substrate.

Compared with resins, leveling agents have a relatively low molecular weight and can seep out of the resin, forming a monolayer on the surface of the coating. It is a very thin and smooth film, thereby improving the gloss of the coating. In addition, if there is slight pollution on the PVC wood plastic substrate, adding leveling agents can also improve the surface condition. Therefore, leveling agents are an important type of additive for improving the coating effect. The amount of leveling agent has a significant impact on the appearance of the coating, and the amount of leveling agent is generally between 0.2% and 0.5%.