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Why are barites black and white?Precipitated barium sulfate should be close to neutral. If it is alkaline, it may neutralize with acid and reduce the catalytic effect of acid. Because the amount of acid added is large, MEK will decrease. In addition, the test of boiling resistance may not pass. The reason is that the cross-linking degree and cross-linking density of the paint film are poor after the acid catalysis effect is reduced. Now, many light calcium is added. It may be alkaline and react with the catalyst.

Barium Sulfate: Pigment Aid, Filler, and Enhancer in Multiple IndustriesBarium sulfate acts on titanium dioxide and pigments as gaskets in plastics to 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 a filling rate of 80% of its weight. It can be used in drainage pipes, speakers, and audio to effectively isolate noise and noise.

Barium sulfate, as an inorganic pigment, is widely used in the coating industry. It exhibits excellent reflective properties in the wavelength range of 300-400 microns, can effectively prevent the paint film from being damaged by light aging, and is an efficient white matte stabilizer. Its unique needle-like crystal structure gives it excellent flat properties and can enhance the leveling of the coating.In addition, the low oil absorption and high filling content of barium sulfate make it an effective means to control the cost of coatings.

Filler in the paint (physical pigments), usually white or slightly colored, is a class of pigments whose refractive index is less than 1.7. It has the basic physical and chemical properties of paint pigments, but due to the similar refractive index and film-forming material, it is transparent in the paint and does not have the ability to color and cover the paint. It is an indispensable pigment.

Application of barium sulfate in coatingsThere are two kinds of natural and synthetic barium sulfate used as pigment. The natural product is weighing SPAR powder, and the synthetic product is called precipitated barium sulfate.Barium sulfate is a dense white powder and inert substance with a density of 4.5g/cm3. It is the heaviest in constitution pigments and has stable chemical properties. It is almost insoluble in water, ethanol and acid, soluble in hot sulfuric acid, alkali and light resistant. The impurity content is less glass luster, cleavage surface is pearl luster.

Barium sulfate is the main body pigment, accounting for 70% of the body pigment, other body pigments such as talcum powder, kaolin, mica powder, bentonite, quartz powder are mainly used as functional fillers. Therefore, the quality of barium sulfate selected directly determines the quality of powder coating. It has high reflectance in the range of 300-400um wavelength and can protect the paint film from light aging. It is an effective and cheap white matt stabilizer.

Study on application of ultrafine barium sulfate in coatingsBarium sulfate is widely used in coatings as a physical pigment, which plays a very important role in improving the thickness, wear resistance, water resistance, heat resistance, surface hardness and impact resistance of the coating film.

What is bariteBarite is the most common mineral of barium, and it is composed of barium sulfate. Produced in hydrothermal veins and limestone and limestone weathered clay deposits. The crystals of barite are large tubes, and the crystals sometimes come together to form rosette-shaped or forked clumps, which are called crested barites. Pure barite is colorless and transparent, generally white or light yellow, with vitreous luster. Barite can be used as a white pigment (commonly known as lithopone), and can also be used as a filler in chemical, paper, textile, and glass production.

Precipitated barium sulfate is used in high solid component coatingsBarium sulfate with a particle size of about 0.7-0.8μm is needed for high solid finish paint. The larger particle grade will affect the surface gloss, and the smaller particle grade will require more base material due to the higher specific surface area.The precipitated barium sulfate with particle size in the range of 0.7μm can resist flocculation and separate pigment, thus reducing the pigment amount to a very low value.

Five major surface modification methods and characteristics of nano barium sulfateAs a new type of inorganic material, nano-barium sulfate is widely used in many fields because of its advantages of high specific surface area, high activity and good dispersibility.However, on the one hand, nano barium sulfate has hydrophilic and oleophobic properties, and there is a big difference in polarity between it and the polymer matrix, so it is easy to agglomerate in the polymer, and its dispersibility is poor, which reduces its mechanical properties; on the other hand, due to the nanometer Barium sulfa