Application range: water-based paint and oil-based paint.
Application characteristics: greatly improve the thixotropy of the system, can significantly improve the coating adhesion, scrub resistance, stain resistance, improve strength and surface finish, and has a good anti-settling effect. Partially replace titanium dioxide to reduce costs.
Nano calcium carbonate is used as a pigment filler in the coating industry, and has the advantages of fineness, uniformity, high whiteness, and good optical properties. Nano-scale ultrafine calcium carbonate has steric hindrance effect, which can suspend the denser lithopone in the formula and play an anti-settling effect in paint making. After the paint is made, the whiteness of the paint film increases, the gloss is high, and the covering power can be used as a pigment filler, which has the advantages of fineness, uniformity, high whiteness, and good optical properties. Nano-scale ultrafine calcium carbonate has steric hindrance effect, In paint making, the lithopone with higher formula density can be suspended to prevent sedimentation. After the paint is made, the whiteness of the paint film increases, the gloss is high, and the hiding power does not decrease, which makes it widely popularized and applied in the paint industry.
Calcium carbonate can be used as a white pigment in coatings and play a skeleton role, and calcium carbonate can be used as an extender pigment in the coatings industry. Because the color of calcium carbonate is white, the price of the solvent is cheap compared with the latex in the coating, and the particles are fine, which can be evenly dispersed in the coating, so it is a widely used extender pigment. Due to the improvement of environmental protection awareness, a large number of water-based coatings have been used in architectural coatings. Because calcium carbonate is white, hydrophilic, and cheap, it is used. The filling of calcium carbonate can enhance the deposition and penetration of the primer to the base surface. In the paint, putty is used to fill the base surface and is the middle layer of the overall paint. No matter what putty needs to add a large amount of filler, the main filler in the putty is heavy calcium carbonate, and a small amount of zinc barium white is added to increase the viscosity to prevent The lacquer layer is loose, and precipitated calcium carbonate is appropriately added for sanding after drying.
In thick paints, calcium carbonate can thicken and thicken the paint, acting as a filling and leveling effect. Therefore, heavy calcium carbonate and light calcium carbonate are usually added to thick paint, and the addition of heavy calcium carbonate can reach 24.6% to 78.5%.
In topcoats, that is, topcoats, semi-gloss and matt paints are used to reduce gloss by adding extender pigments. Calcium carbonate is an ideal matting filler.
Calcium carbonate can play its role as one of the additives in colorful paints to achieve the purpose of reducing material costs and improving decorative effects. Light calcium carbonate, namely precipitated calcium carbonate, can be used in colorful coatings. Its oil absorption is about 80%, its particle size is about 15 microns, its specific gravity is about 2.7, and its refractive index is about 1.60. It can also be ground from heavy calcium carbonate (calcite powder), that is, natural marble.
In metal anti-rust coatings, calcium carbonate is an extender pigment and has a little anti-rust effect. The appropriate amount of calcium carbonate in metal anti-rust coatings is 30%.