What are the advantages of precipitated barium sulfate in the application of coatings?
The role of precipitated barium sulfate in the coating industry is strengthening agent, welcomed by the majority of consumers, it can improve the coating water resistance, heat resistance, wear resistance, impact resistance, is a cheap and effective white inorganic light stabilizer, can avoid the aging of the paint surface, can also be used as strengthening agent in the coating. Because it has very high filling sex, and oil absorption is not tall, make the cost such as coating of all sorts of oily, water-borne drops obviously. Can also take it to replace titanium dioxide, covering power compared with titanium dioxide and did not decline, and increased the whiteness and brightness of the paint. Precipitated barium sulfate is a kind of environment-friendly material because of its advantages of strong chemical versatility, good stability, acid and alkali resistance, insoluble in water, ethanol, organic solvent, moderate hardness, high whiteness, high gloss, absorption of harmful X-ray and so on.
The coating produced with precipitated barium sulfate not only increases the solid content of the coating, but also reduces the amount of solvent, even at a higher concentration, but also has a very high gloss. It not only saves raw materials, but also greatly improves production efficiency and creates enterprise profits.
In the application of paint has the following advantages:
1. High cost performance
Precipitated barium sulfate has a very high reflection coefficient in a very wide spectrum, so its appearance is white powder, and color neutral. This preserves the original brilliance and tone of the paint. Most pigments tend to form aggregates, which weaken the coloring power of the pigment. The use of precipitated barium sulfate can obviously and effectively reduce the problem of flocculation in the preparation of various pigments, increase the steric resistance or charge repulsion to stabilize the pigments, and improve the cost effectiveness of aqueous colorants, solvent colorants and general colorants. Also can effectively reduce the use of various pigments, to replace the role of pigments, including titanium dioxide, color pigments and carbon black.
2. Can be used to adjust gloss
Precipitated barium sulfate has excellent dispersion, so the coating added with precipitated barium sulfate, even at a higher concentration, has a very high gloss and rheological properties.
3. Solvent content can be reduced
Low oil absorption of precipitated barium sulfate can effectively increase the solid content of color paste and reduce the amount of solvent. Almost no effect on viscosity and VOC reduction.
4. Can shorten the grinding time
The application of precipitated barium sulfate in the preparation of coatings can effectively reduce the problem of flocculation in the preparation of various pigments, not only save raw materials, but also shorten the time of grinding dispersion.
5. Excellent weather resistance/chemical resistance
Precipitated barium sulfate has strong light reflection ability in the ultraviolet wavelength range, can cooperate with TiO2, has good sun resistance and weather resistance.
6. Improve mechanical properties
The coating with barium sulfate precipitation has better adhesion between layers and film hardness.
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