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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.

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.

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.

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.

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.

Barium sulfate, also known as barytes, is a white crystalline powder that is commonly used in a wide variety of applications across various industries. Some of the common applications of barium sulfate in daily life are as follows:1. Radiography: Barium sulfate is used as a contrast agent for X-rays or other types of medical imaging. It is used in medical imaging studies that diagnose gastrointestinal conditions such as stomach ulcers, colon cancer, and inflammatory bowel disease.2. Paints and coatings: Barium sulfate is used as a pigment extender in various types of paints and coatings.

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.

The use of barium sulfate as gasket for titanium dioxide and pigment in plastic can reduce the amount of pigment and save about 10% of the cost.The application of barium sulfate (about 25%) to PP can make the surface of PP similar to ABS, and does not affect the existing characteristics of PP, providing high gloss and high hardness surface;Barium sulfate can reach 80% of its weight filling rate, applied to drainage pipes, sound boxes, sound can effectively isolate noise, noise, barium sulfate N applied to curtain can increase weight;For home appliance shell can provide high gloss, good color,

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.

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