Common anti shrinkage leveling agents

Common anti shrinkage leveling agents:

The main components of solvent leveling agents are various high boiling point mixed solvents, which have good solubility and are also good wetting agents for pigments. By using high boiling point leveling agents to adjust the volatilization rate, the problem of whitening can also be overcome.

Commonly used long-chain resins with limited compatibility include polyacrylic acid and cellulose acetate. Their surface tension is relatively low, which can reduce the surface tension between the coating and the substrate, improve the wettability of the coating to the substrate, eliminate gas molecules adsorbed on the solid surface being coated, and prevent the adsorbed gas molecules from being discharged too late and forming defects such as cavities, shrinkage cavities, and orange peel on the cured coating surface; Improve the smoothness and flatness of the coating surface.

Commonly used long-chain silicone resins with limited compatibility include polydimethylsiloxane, polymethylphenylsiloxane, and organic modified polysiloxane. This type of substance can improve the wettability of the substrate and control surface flow, playing a role in improving the leveling effect. When the solvent evaporates, the silicone resin forms a monolayer on the surface of the coating, improving the gloss of the coating.

Modified polydimethylsiloxane can reduce the interfacial tension between the coating and the substrate, improve the wettability of the substrate, enhance adhesion, prevent discoloration, orange peel, reduce shrinkage, needle holes, and other surface defects of the coating film.

Fluorine based surfactants, whose main components are polyfluorinated polyolefins, also have good compatibility and surface activity for many resins and solvents, help to improve wettability, dispersion and leveling, and can also adjust the solvent evaporation rate in solvent based paints.