Barium sulphate in coatings

Barium sulfate is an important chemical raw material. It is widely used in paints, pigments, coatings, inks, batteries, paper, plastics, rubber, ceramics, enamels, spice and other industry. The major use of barium sulfate is industry primer, including automotive primer. Because of the low oil absorption, large density, granular or spherical structure. So it has good filling properties to gloss and good gloss. Barium sulfate is commonly used to first coat, gloss is very important in this type of paint.
Barium sulfate have high complementarity, and it can be applied to all coatings series. Its low specific surface area and diameter of Division and fast-flowing nature makes barium sulfate in polishing processes with low wear. Barium sulfate supports for automatic primer surface layer.

Barium sulfate is divided into two production technology: physical and chemical methods.

Briefly, the physical process is the stones directly into powders. According to the customers requirements to fineness of grind. It is low prices, but impurities, low purity, and unstable whiteness.

The chemical process is complex, basic technology is artificial selection of stone, stone washing, pickling, washing, crushing, and so on. As a result, the barium sulfate is high purity, good whiteness and low impurity. Because of the complexity of its processes, their disadvantage is the price is twice of ordinary barium sulphate.
Modern coatings is complex and high-tech products should have a variety of functions. Barium Sulphate is no longer just to use as a filler. The production of precipitated barium sulfate specifically for application of coatings adjust their production technology, and make them have better particle size distribution, which has excellent dispersibility, rheology, abrasion resistance and chemical stability.

Nowadays, precipitation barium sulfate can for production of low fog shadow, and bright, high gloss of surface paint and very low VOC of solvent type coatings or electrophoresis paint. Because of the transparency of precipitation barium sulfate, thus it can be used in color or black of system. Special custom of precipitation barium sulfate can preparation translucent of coatings, or coated and covered with inorganic semiconductor to form connected non-black antistatic primer, and printing ink of conductive channel.

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