The specific role of heavy calcium carbonate in coatings

Heavy calcium carbonate has been widely used in paper, plastic, plastic film, coatings, rubber, adhesives, sealants, daily chemicals, etc. What is the specific role of heavy calcium carbonate in coatings?

Heavy Calcium Carbonate In the coating, calcium carbonate can be used as a white pigment to provide a skeleton effect. Calcium carbonate can be used as a body pigment in the coating industry. Because the color of calcium carbonate is white, the solvent is cheaper in the paint, and the solvent is cheaper, and the particles are fine and can be evenly dispersed in the paint, so it is a lot of body pigments used. Because of the advancement of environmental protection, there have been many water-based paints on the construction side. Because calcium carbonate is white and hydrophilic, the price is cheap, so it is used. The filling of heavy calcium carbonate enhances the buildup and permeability of the primer to the underlying surface. In the guessing, the putty is used to fill the base surface. It is the middle layer of the whole paint. No matter what kind of putty, it needs to add a lot of filler. The filler body in the putty is heavy calcium carbonate, and a few add some zinc white to add viscosity. Avoid lax paint and properly participate in the deposition of calcium carbonate for dry grinding.

In thick lacquers, heavy calcium carbonate thickens and thickens the coating, creating a filling and leveling effect. Therefore, in the thick paint, the addition of high-quality calcium carbonate and light calcium carbonate is added, and the added calcium carbonate can reach 24.6% to 78.5%.

In topcoats, that is, overcoats, semi-gloss and matt lacquers require the addition of extender pigments to reduce gloss. Calcium carbonate is an ambiguous matting filler.

Heavy calcium carbonate can be used as an additive in colorful paints to promote its effect, reaching the goal of reducing the cost of materials and improving the decoration effect. In the colorful paint, light calcium carbonate can be used, that is, deposited calcium carbonate, the oil absorption is about 80%, the particle size is about 15 microns, the specific gravity is about 2.7, and the refractive index is about 1.60. It can also be ground with heavy calcium carbonate (calcite powder), that is, natural marble.

In metal anti-rust coatings, heavy calcium carbonate is a body pigment, and there is a little anti-rust effect. The appropriate amount of heavy calcium carbonate in the metal anti-rust coating is 30%.

After reading the above, do you know about the role of heavy calcium carbonate in coatings? If you have any questions, please feel free to contact us!