Yuan Lei's Little Knowledge | Advantages of Barium Sulfate
The physical and chemical properties of barium sulfate: barium sulfate is white or off-white crystalline powder, is an important barium-containing mineral, with strong chemical inertness, good stability, acid and alkali resistance, high density, moderate hardness, high specific gravity, high whiteness, can absorb harmful rays (X-rays and Y-rays) and other advantages. It has the luster of glass, non-magnetic and non-toxic. And environmentally friendly materials, so widely used in a variety of coatings, high-grade ink, rubber, paper, ceramics and other fields. Refined barium sulfate is also used in high-grade paint, engineering plastics (home appliance shell, building materials plastic), high-grade insulation rubber, rubber products, battery cathode expansion rod, can also be used for ceramics, enamel glaze materials.
Precipitated barium sulfate is used as filler, brightening agent and weighting agent in rubber, plastic, paper making, paint, ink, coating and other industries. Barium sulfate for interior and exterior wall decoration can effectively shield X-ray and Y-ray, can effectively prevent the leakage of blocking ray.
Barium sulfate acts on titanium dioxide and pigments in the plastic gasket can reduce the amount of pigment added and save about 10% of the cost.
Barium sulfate (about 25%) is applied to PP surface like ABS, and does not affect the existing characteristics of PPV, providing gloss and high hardness surface.
Barium sulfate can reach 80% of its weight filling rate, used in drainage pipes, speakers, sound can effectively isolate noise, noise, barium sulfate used in curtains can increase the weight. For household electrical appliances shell can improve the luster, good hue, surface scratch resistance, good size stability and other advantages.
Barium sulfate in the coating is used as a body pigment in the coating, to improve the coating thickness, wear resistance, water resistance, heat resistance, surface hardness, impact resistance plays a very important role. 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 volume, it can reduce the cost of coatings and can be used for water-based coatings, primers, intermediate paint coatings, oil-based coatings, etc. Using it to replace 10%-25% of titanium dioxide in water-based coatings, the whiteness increased the hiding rate did not decrease.
Lacquer and Thick Paste Coatings：Barium sulfate has high filling property and can be applied to all coating series, such as primer, thick paste coating and other types. Its specific surface area, particle size fraction and easy fluidity make barium sulfate have low abrasion property during processing. Barium sulfate is recommended to be used for automatic primer surface layer, and even maintain good uniformity and smoothness when filling high.
Topcoat：Barium sulfate is superior to most other fillers, especially in chemical resistance coating. It is inert, insoluble in water, acid, alkali and organic intermediary, excellent gloss and particle fineness, which can protect the topcoat from long-term exposure. Barium sulfate is recommended for topcoat, which can increase surface hardness and color stability.
latex paint：Due to weight, barium sulfate can only be used for latex paint, mainly for high luminosity and silk grain paint, and is known as "acid-resistant" latex paint, even when exposed, it also has acid resistance. Barium sulfate's easy dispersion, optical activity preservation and easy retention can increase its chemical properties, and barium sulfate can be used for the same high-gloss paint and latex paint.
Wood Products and Paint：Barium sulfate has the characteristics of low cohesion, low light dispersion and fine particle holding, especially suitable for pigment topcoat, varnish, spray paint, etc. According to the study of barium sulfate with chemical resistance and weather resistance.
powder coating：In powder coatings, barium sulfate can improve its gloss, fluidity, filling and compatibility with various pigments.
Barium sulfate, used, paint, filled, with, ray, pigment, application, gloss
Kaolin is a non-metallic mineral, which is a kind of clay and clay rock mainly composed of kaolinite clay minerals. Because it is white and delicate, also known as white earth. It is named after Gaoling Village, Jingdezhen, Jiangxi Province.
Barium sulfate is based on barite as the main raw material, through beneficiation, ore washing, crushing and other processes. Barium sulfate has a hardness of 3~3.5 (Mohs) and a specific gravity of 4.3~4.7. It has the characteristics of high specific gravity, low hardness and brittleness. Barite is almost insoluble in water, ethanol and acid, soluble in hot concentrated sulfuric acid. With the development of some high-performance barium sulfate products, the application field of barium sulfate is constantly expanding.