What are the advantages of precipitated barium sulfate in the application of coatings?
Precipitated barium sulfate is a reinforcing agent in the coating industry and is very popular among consumers. It can improve the water resistance, heat resistance, wear resistance and impact resistance of coatings. It is a cheap and effective white inorganic light stabilizer that can prevent paint surface aging and can also be used as a reinforcing agent in coatings. Because it has high filling properties and low oil absorption, it significantly reduces the cost of various oil-based coatings, water-based coatings, etc.
Precipitated barium sulfate can also be used to replace titanium dioxide. Compared with titanium dioxide, its hiding power is not reduced, and it increases the whiteness and brightness of the coating. Precipitated barium sulfate is an environmentally friendly material because of its strong chemical polyurethane, good stability, acid and alkali resistance, insoluble in water, ethanol, organic solvents, moderate hardness, high whiteness, high gloss, and absorption of harmful X-rays.
The coating produced by precipitated barium sulfate not only increases the solid content of the coating, but also reduces the amount of solvent used. Even at a higher concentration, it has extremely high gloss. In the production and manufacturing, it not only saves raw materials, but also greatly improves production efficiency and creates corporate profits.
It has the following advantages in coating applications:
1. High cost performance
Precipitated barium sulfate has an extremely high reflectivity in a wide spectrum, so it looks like a white powder and is color neutral. This can maintain the original brightness and hue of the pigment. Most pigments are prone to form agglomerates, which will weaken the coloring power of the pigment. Whether it is water-based color paste, solvent color paste or universal color paste, the use of precipitated barium sulfate will significantly and effectively reduce the flocculation problem in the preparation of various pigments, increase steric hindrance or charge repulsion to stabilize the pigment, and improve its cost-effectiveness. It can also effectively reduce the use of various pigments and play a role in replacing pigments, including titanium dioxide, color pigments and carbon black.
2. Can be used to adjust gloss
Precipitated barium sulfate has excellent dispersibility, so the paint with precipitated barium sulfate has extremely high gloss and rheological properties even at higher concentrations.
3. Can reduce solvent content
Precipitated barium sulfate has low oil absorption, which can effectively increase the solid content of the color paste and reduce the amount of solvent. It has almost no effect on viscosity and reduces VOC.
4. Can shorten the grinding time
The use of precipitated barium sulfate in the preparation of coatings can effectively reduce the flocculation problem in the preparation of various pigments, not only save raw materials, but also effectively shorten the grinding and dispersion time.
5. Very good weather resistance/chemical resistance
Precipitated barium sulfate has strong light reflection ability in the ultraviolet wavelength range, and can cooperate with TiO2 to have good sun resistance and weather resistance.
6. Improve mechanical properties
The coating with added precipitated barium sulfate has better interlayer adhesion and film hardness.