Silica Sol Applied to Coatings

Silica sol is one of the auxiliary film-forming substances of paint, and it is a colloidal solution of inorganic polymer polymetasilicate with water as the dispersion medium. Its silica particles are mostly in the form of spherical single or multiple agglomerated and scattered, which can firmly adhere to the surface of the substrate and filler particles. When the silicon solution loses water, the monomeric silicic acid gradually polymerizes into high-polymer silica gel. With the evaporation of water, the colloidal molecules increase, and finally form a -SIO-O-SIO-coating film. Its water resistance and heat resistance are significantly better than Organic coatings, the coating film is dense and hard, does not generate static electricity, and it is difficult for various dust in the air to adhere.