An article about barium sulfate

The main properties of barium sulfate are 3 points: 1. It is decomposed by high heat to produce toxic sulfide flue gas. 2. Avoid contact with oxides. Almost insoluble in water, ethanol and acid. Soluble in hot concentrated sulfuric acid, easy to agglomerate when dry. At 600 ℃, it can be reduced to barium sulfide with carbon. It can be reduced with hydrogen at 900-1000°C. Staff should be well protected, and the workplace should have good ventilation conditions. In case of accidental contact with skin and eyes, wash immediately with running water. 3. It is weakly alkaline, and it is reduced to barium sulfide by co-heating with carbon, and no color change occurs in contact with hydrogen sulfide gas.

Barium sulfate is widely used in various coatings, rubber, ceramics, papermaking, ink and other industries. Precipitated barium sulfate is used as filler, brightener and weighting agent in rubber, plastics, papermaking, paints, inks, coatings and other industries. Barium sulfate is used to decorate the interior and exterior walls, which can effectively shield X-rays and Y-rays, and can effectively prevent the leakage of blocking rays. The effect of barium sulfate on titanium dioxide and pigments in plastic gaskets can reduce the amount of pigment added and save about 10% of the cost. Applying barium sulfate (about 25%) to the surface of PP is similar to ABS, and does not affect the existing characteristics of PPV, providing gloss and high hardness surface. Barium sulfate can reach 80% filling rate of its weight. It can effectively isolate noise and noise when applied to drain pipes, speakers and speakers. Barium sulfate N can increase the weight when applied to curtains. It can improve the gloss, good hue, surface scratch resistance and good size stability when used in the housing of household appliances.

Barium sulfate is used as an extender pigment in coatings, which plays an important role in improving the thickness, abrasion resistance, water resistance, heat resistance, surface hardness, and impact resistance of the coating. In addition, barium sulfate has high reflectivity in the wavelength range of 300-400 microns, which can protect the paint film from light aging, and is an effective and inexpensive white inorganic light stabilizer. Because of its low oil absorption and high filling content, it can reduce the cost of coatings and can be used for water-based coatings, primers, intermediate paint coatings, oil-based coatings, etc. It is used to replace 10%-25% of titanium dioxide in water-based paints, and the result is that the whiteness increases and the covering rate does not decrease.

So what are the requirements for the whiteness and purity of barium sulfate in paint coatings? The coating requires barium sulfate with high whiteness and purity, and does not contain other mechanical impurities. It is currently the product with the highest quality and the most superior performance among similar products. It can absorb X-ray and γ-ray, and give the material high density and surface finish. In the paint industry, barite powder fillers can increase film thickness, strength and durability. Therefore, when the gloss required by the coating is not high, the matt barium sulfate is used; once the gloss required by the coating is high, the high gloss barium sulfate is used.

Extinct barium sulfate is a name in the chemical industry. It is also known as barite powder. The main component of barite is barium sulfate. Because this product is widely used in industrial products; coatings, paints, plastics, rubbers, inks, and ceramics, it can play a matting or matt role, so it is called matting barium sulfate. as a special filler. Its application can replace or reduce the use of matting agents and effectively reduce costs. Matting barium sulfate is the use of pure physical and chemical processing methods to process selected barite, so it has four major advantages: one: brighter color. Second: more stable system, third: stronger paint film Fourth: better weather resistance.

High-gloss barium sulfate is a chemical substance, colorless orthorhombic crystal or white amorphous powder. Almost insoluble in water, ethanol and acid. Soluble in hot concentrated sulfuric acid, easy to agglomerate when dry. At 600 ℃, it can be reduced to barium sulfide with carbon. It has good dispersion, high whiteness and good leveling. Excellent light resistance, weather resistance and acid resistance. 3. Good chemical inertness and moderate surface energy, good dispersibility and affinity with other media when used as functional filler. Compatible with all colorants. 4. It can replace some of the higher-priced raw materials such as precipitated barium sulfate, titanium dioxide, active silica, etc. It is an environmentally friendly material that can absorb harmful rays and has a good effect in powder coatings.