Matting powder 
Anti-caking agent

Dry powder
The product is amorphous powder or granular, has high insulation, is insoluble in water and common acid, soluble in caustic and hydrofluoric acid, is not decomposed by high temperature, is water-absorbing and non-toxic. Scope of application: It is mainly used in rubber industry products such as handicrafts, shoes, tires, cables, etc. It can also be used as a carrier or thickener in pesticides, fire extinguishing agents and advanced toothpaste paints. It is added to veterinary drugs to absorb water. Wait

White carbon black 

Superfine White carbon black 

Hydrophobic silica 

Release agent
The release agent is a functional substance between the mold and the finished product. The release agent is chemically resistant and is not dissolved when it comes into contact with the chemical components of different resins (especially styrene and amines). The release agent also has heat resistance and stress properties, and is not easily decomposed or worn; the release agent is bonded to the mold without being transferred to the workpiece to be processed, and does not hinder painting or other secondary processing operations. Due to the rapid development of processes such as injection molding, extrusion, calendering, molding, lamination, etc., the amount of release agent is also greatly increased.

Plastic opening agent
Opening agent, also known as slip agent, anti-blocking agent anti-caking agent, etc., is commonly used in the production and preparation of plastic film products, which can effectively improve the opening performance of the film. Talc powder, diatomaceous earth, etc.; medium-term development of organic oleic acid amide, erucamide and EBS derivatives; currently, the use of synthetic silica as an opening agent in the film is also widely used. 
Toothpaste grade silica
Plastic masterbatch purposed silica
Aerogel silica adsorbent
Fumed silica 

Process flow
supplement:
The traditional method for preparing White carbon black is to use sodium silicate, silicon tetrachloride, or ethyl orthosilicate as a silicon source, and the cost is high except for sodium silicate. The new method uses inexpensive non-metallic minerals as a source of silicon, reducing the production cost of White carbon black.

White carbon black

Traditional method
(1) The gas phase method is 
mainly a chemical vapor deposition (CAV) method, which is also called a pyrolysis method, a dry method or a combustion method. The raw materials are generally silicon tetrachloride, oxygen (or air) and hydrogen, which are formed by reaction at a high temperature. The reaction formula is: 
SiCl4+ 2H2+ O2—>SiO2+4HCl 
air and hydrogen are respectively subjected to pressurization, separation, cooling and dehydration, silica gel drying, dust removal and filtration, and then sent to a synthetic hydrolysis furnace. After the silicon tetrachloride raw material is sent to the rectification column for rectification, it is heated and evaporated in an evaporator, and sent to the synthetic hydrolysis furnace by using the dried and filtered air as a carrier. After the silicon tetrachloride is gasified at a high temperature (flame temperature of 1000~1800 °C), it is subjected to gas phase hydrolysis with a certain amount of hydrogen and oxygen (or air) at a high temperature of about 1800 °C; the fumed silica particles formed at this time Very fine, forming aerosol with gas, not easy to capture, so it is first aggregated into larger particles in the concentrator, then collected by cyclone separator, then sent to the deacidification furnace, and the fumed silica is purged with nitrogen-containing air. To the PH value of 4 to 6 is the finished product. 
Germany's Degussa and Cabot are the world's leading gas phase production technologies. Their production facilities are large in scale, high in automation, low in product cost, and have many grades (especially for functional special products in special fields) with good quality, such as uniform surface area distribution and low water content. 
(2) Precipitation method The 
precipitation method is also called sodium silicate acidification method. The water glass solution is reacted with an acid, and precipitated, filtered, washed, dried and calcined to obtain White carbon black. The reaction formula is: 
Na2SiO3 + 2H+ —> White carbon black + 2Na+ + H20 
Most domestic manufacturers adopt precipitation method.

White carbon black

new method
The new method mainly uses non-metal ore and its extension as the silicon source, and prepares white carbon black by precipitation method. The key to its technology is the conversion of crystalline silica and silicates into amorphous silica. The raw materials mainly include wollastonite, opal, halloysite, olivine, snake-mosquito, kaolin, hard kaolin, coal gangue, fly ash and the like. 
The process technology of preparing white carbon black from kaolin or hard kaolin, coal gangue or fly ash is emphasized. 
(1) Kaolin or hard kaolin is 
first pulverized to 50-60 mesh with kaolin or hard kaolin, then calcined at 500-600 °C for 2 hours, and then the calcined soil and industrial hydrochloric acid with a concentration of 30% are 1 : 2.5 (weight) ingredients, acid leaching at 90 °C for 7 hours, neutralized, filtered, washed, dried to obtain White carbon black, product quality in line with GB10507-89; at the same time get high-efficiency water purifying agent polyaluminum chloride. The calcination and acid leaching reactions are as follows: 
calcination: Al2O3·2Si02·2H20 —> Al2O3·2Si02 + 2H20 
acid leaching: Al2O3·2Si02 + 6HCl + 9H20 —> 2AlCl3·6H20 + 2SiO2 
( 2 ) with coal gangue or fly ash Raw materials 
First pulverized coal gangue or fly ash to a particle size of less than 120 mesh, and then divided into two steps: the 
first step to produce sodium silicate: mixing the pulverized coal gangue or fly ash with soda ash at a weight ratio of 1: 50, High-temperature smelting (1400~1500 °C, 1 hour), water extraction and leaching (100 °C or more, 4~5 hours), filtering impurities, and concentrating the filtrate to 45~46 Baume to obtain sodium silicate.
The second step is to produce White carbon black: firstly prepare sodium silicate into water glass solution (modulus 2.4~3.6, SiO2 content 4~10%), then acid soak in 5~20% sulfuric acid (28~32) °C, 8~16 hours), then warm to 80 °C, stir, adjust the pH value to 5~7, mature for 20 minutes, then filter, wash, dry and sort to get White carbon black. The White carbon black is active and highly pure.

Application
Due to a series of superiority White carbon black products, it can be widely used in many fields.

White carbon black rubber products

White carbon black is used in color rubber products instead of carbon black to meet the needs of white or translucent products. White carbon black also has excellent adhesion, tear resistance and heat and aging resistance, so it can replace some carbon black in black rubber products to obtain high quality rubber products, such as off-road tires, engineering tires, Meridian tires, etc.

White carbon black agricultural chemicals

In agrochemical products, such as pesticides, fertilizers and the like spraying efficiency, White carbon black used as a carrier or diluent, a disintegrant, do disintegrants in water-dispersible granules using wdg improved suspension rate, the recommended content 10 % or so. It maintains long-lasting effectiveness because of its extremely high surface area, high adsorption capacity, easy suspension, good affinity and chemical stability. Even in rain, wash and hot conditions, it can remain unchanged for a long time.

White carbon black daily chemical products

Transparent color and opaque toothpaste with White carbon black as filler and abrasive. This type of toothpaste has good flexibility and dispersibility. The paste is smooth, soft and abrasive. It does not abrade the toothpaste tube. It can keep the drug toothpaste. The drug is stable. In particular, it has good compatibility with fluoride, which can avoid the disadvantages of calcium salts as abrasives to produce insoluble salts.

White carbon black cement

It is used in adhesives made of natural rubber or synthetic rubber to provide thixotropic and reinforcing properties, and at the same time, it can improve adhesion due to its stretchability, and is inexpensive.

White carbon black anti-caking agent

White carbon black can be used in some products to improve free-flowing properties such as grass fertilizers, fungicides, abrasive abrasives, laundry bleaches, phenolic injections of urotropine, phenol and urea plastics, rubber sulphur and anti-knot Block mixture.

White carbon black paper filler

Paper filler with White carbon black can improve the paper's resistance to ink penetration and mechanical strength, increase whiteness and reduce unit weight. It can effectively achieve paper weight reduction, reduce production costs, and improve paper performance. 
It can also be used in many industries such as fire-fighting agents, feeds, cosmetics, matting agents, pigments, and paints.

White carbon black gas phase application

White carbon black is one of the most important high-tech ultra-fine inorganic materials. Due to its small particle size, it has large specific surface area, strong surface adsorption, large surface energy, high chemical purity, good dispersion performance, thermal resistance, The electrical resistance and other aspects have specific properties, and its unique stability, reinforcement, thickening and thixotropic properties have unique characteristics in many disciplines and fields, and have an irreplaceable role. White carbon black, commonly known as "Nano White Carbon Black", is widely used as an additive, catalyst carrier, petrochemical, decolorizer, matting agent, rubber reinforcing agent, plastic filler, ink thickener, metal soft mill in various industries. Light agents, insulating and insulating fillers, advanced daily cosmetic fillers and spray materials, environmental protection and other fields. It also provides new material foundation and technical guarantee for the development of related industrial fields. Since it exhibits a specific function in comparison with conventional materials in terms of magnetic properties, catalytic properties, light absorption, thermal resistance, and melting point, it has received great attention. The following is the application of gas phase White carbon black in various industries.

White carbon black electronic packaging material

Organic electroluminescent device (OELD) is a new type of flat display device newly developed. It has low on-drive and low-drive voltage, and can be driven by DC voltage. It can be matched with large-scale integrated circuits, and it is easy to realize full color and brightness. High (>105cd/m2), but the service life of OELD devices can not meet the application requirements. One of the technical difficulties to be solved is the package material and packaging technology of the device. At present, foreign countries (Japan, America, Europe, etc.) widely use silicone-modified epoxy resin, that is, through the blending, copolymerization or grafting reaction between the two, it can reduce the internal stress of epoxy resin and form molecules. Internal toughening, improve high temperature resistance, and also improve the waterproof, oil and oxygen resistance of silicone, but it requires a longer curing time (a few hours to several days), to accelerate the curing reaction, it needs to be higher Temperature (above 60 °C to 100 °C) or increase the amount of curing agent used, which not only increases the cost, but also is difficult to meet the requirements of packaging materials for large-scale device production lines (short-time, room-temperature packaging). The surface-treated white carbon black is fully dispersed in the silicone-modified epoxy resin encapsulant matrix, which can greatly shorten the curing time of the encapsulant (2.0-2.5h), and the curing temperature can be lowered to room temperature. , significantly improve the sealing performance of OELD devices and increase the service life of OELD devices.

White carbon black resin composite

Resin-based composite materials are light, high-strength, and corrosion-resistant. However, the material industry and the national economy pillar industries are increasingly demanding the performance of resin-based materials. How to synthesize high-performance resin-based composite materials has become An important topic in the current material and business world. The advent of the gas phase White carbon black provides a new opportunity for the synthesis of resin-based composites, providing a new way for the modification of traditional resin-based materials, as long as the gas phase White carbon black particles can be fully and uniformly dispersed into the resin. In the material, the purpose of comprehensively improving the performance of the resin-based material can be fully achieved. 
1. Improve strength and elongation. Epoxy resin is a basic resin material, and the gas phase White carbon black is added to the epoxy resin, which is completely different in structure from the epoxy resin-based composite material added by the coarse-grained silica (White carbon black, etc.), coarse-grained SiO2. Generally added as a reinforcing agent, it is mainly distributed in the chain of polymer materials, and the gas phase White carbon black is extremely strong due to the serious surface coordination, large specific surface area and surface under-oxygenation. The activity is easy to bond with the oxygen of the epoxy ring molecule, which improves the bonding force between the molecules. In the same fashion, a part of the gas phase White carbon black particles are still distributed in the voids of the polymer chain, and the coarse crystal SiO2 particles are phased. Compared with the high flowability, the strength, toughness and ductility of the epoxy resin added by the gas phase White carbon black are greatly improved. 
2, improve wear resistance and improve the surface finish of the material. The gas phase White carbon black particles are 100-1000 times smaller than SiO2, and it is added to the epoxy resin to facilitate the drawing. Due to the high fluidity and small size effect of the gas phase White carbon black, the surface of the material is more dense and fine, the friction coefficient becomes smaller, and the high strength of the nanoparticles increases the wear resistance of the material.
3, anti-aging performance. A fatal weakness in the use of epoxy resin matrix composites is the poor anti-aging properties. The main reason is the ultraviolet and long-wave effects of solar radiation in the 280-400 nm band. Its damage to resin-based composites is very serious. The degradation of the polymer chain causes the resin-based composite material to age rapidly. The gas white carbon black can strongly reflect the ultraviolet light, and the addition of the epoxy resin can reduce the degradation of the epoxy resin by the ultraviolet light, thereby achieving the purpose of delaying the aging of the material.

White carbon black plastic

The use of gas phase White carbon black light transmission, small particle size, can make the plastic more compact, adding the gas phase White carbon black to the polystyrene plastic film, not only improve its transparency, strength, toughness, but also waterproof and anti-aging properties. Significantly improved. The hardness, smoothness and anti-aging properties of plastic steel doors and windows produced by adding a small amount of gas phase White carbon black to ordinary plastic polyvinyl chloride are greatly improved. The general plastic polypropylene was modified by gas white carbon black. The main technical indexes (water absorption, insulation resistance, compression residual deformation, flexural strength, etc.) met or exceeded the performance index of engineering plastic nylon 6, and realized the polypropylene railway. The replacement of nylon 6 for accessories has greatly reduced the cost of the product, and its economic and social benefits are very significant.

White carbon black paint

China is a big country in the production and consumption of paints. However, the current domestic coatings generally have shortcomings in performance, such as poor suspension stability, poor thixotropy, poor weatherability, and poor scrub resistance, resulting in the import of a large number of high-quality paints every year. Some paint manufacturers in Shanghai, Beijing, Hangzhou, Ningbo and other places dare to innovate and successfully realize the application of gas white White black in coatings. This nano-modified coating has changed the defects of the previous products and tested its main performance indicators. Except for the contrast ratio, the rest have been greatly improved. For example, the scrub resistance of exterior paint has been increased from more than one thousand to more than 10,000 times. The artificial accelerated weathering and artificial radiation exposure aging time is 250 hours ( Powdered grade 1, discoloration grade 2) increased to 600 hours (no powdering, no discoloration of the paint film, color difference 4.8), in addition, the bonding strength between the coating film and the wall is greatly improved, the hardness of the coating film is significantly increased, and the surface self-cleaning ability is improved. Also improved.

White carbon black rubber

Rubber is an elastic body with excellent stretchability, but its comprehensive performance is not satisfactory. In the process of producing rubber products, carbon black is usually added to the rubber to improve strength, wear resistance and aging resistance, but The addition of black makes the products black and the grade is not high. The advent of the gas phase White carbon black in China has laid a material foundation for the production of a new generation of rubber products with novel colors and excellent performance. After adding a small amount of gas white carbon black to ordinary rubber, the strength, wear resistance and aging resistance of the product meet or exceed the high-grade rubber products, and the color can be kept unchanged for a long time. The nano-modified color EPDM waterproofing membrane has obvious improvement in wear resistance, tensile strength, folding resistance and anti-aging property, and has bright colors and excellent color retention effect. The development of color tires has also made some progress. For example, the flexural performance of tire side rubber has increased from 100,000 times to more than 500,000 times. It is expected that in the near future, the colorization of domestic and motorcycle tires will be realized.

White carbon black pigment (dye)

Although organic pigments (dyed) have bright colors and strong tinting strength, they are generally inferior to inorganic pigments in light, heat, solvent and migration resistance. The surface modification of the organic pigment (dye) by adding the gas phase White carbon black not only greatly improved the anti-aging property of the pigment (dye), but also improved the brightness, hue and saturation. It is comparable to imported high-end products, greatly expanding the grade and application range of organic pigments.

White carbon black ceramic

Using gas white carbon black instead of nano A1203 added to 95 porcelain, it can play the role of nanoparticles, and it is the second phase of the particles, not only improve the strength and toughness of the ceramic material, but also improve the hardness and elasticity of the material. Modulus and other properties, the effect is more ideal than adding A1203. The use of the gas phase White carbon black to composite the ceramic substrate not only improves the compactness, toughness and smoothness of the substrate, but also greatly reduces the sintering temperature. In addition, the gas phase White carbon black is also very effective in ceramic products such as ceramic filters and corundum balls.

White carbon black sealant, adhesive

Sealant and adhesive are important products with large quantity, wide surface and wide application range. It requires product viscosity, fluidity, and cure speed to meet conditions. China's products in this field are relatively backward, and high-grade sealants and adhesives are imported. Foreign products in this field have used nanomaterials as modifiers, while gas phase White carbon black is the preferred material. It is mainly coated with an organic material on the surface of the gas white carbon black to make it hydrophobic. A silica structure is formed quickly in the sealant, that is, the nano-SiOx small particles form a network structure to inhibit colloidal flow, accelerate the curing speed, and improve the bonding effect. The gas white carbon black particle size also increases the sealing and prevention of the product. Permeability.

White carbon black fiberglass products

Although FRP products have the advantages of light weight, high strength and corrosion resistance, they are inherently low in hardness and poor in wear resistance. Experts added the gas phase White carbon black to the gel coat resin by ultrasonic dispersion method, and compared it with the gel coat without added gas white carbon black. It was found that the Mohs hardness was 2.2 grade (corresponding to the hardness of gypsum). Increased to 2.8~2.9 grade (3 grade is the hardness of natural marble), the wear resistance is increased by 1~2 times. Due to the grafting and bonding of nanoparticles and organic polymer, the toughness of the material is increased, so the tensile strength and resistance The impact strength is increased by more than 1 time, and the heat resistance is also greatly improved.

White carbon black drug carrier

With the rapid growth of urban domestic garbage and the increasing environmental pollution, it is urgent to increase the intensity of eliminating the "four evils" and prevent the spread of diseases. Applying lime to the trunk and spraying the syrup on the garbage can have little effect. Currently, large cities have used spraying central nervous anesthetic insecticides to eliminate insect pests such as mosquitoes, flies, and cockroaches, but these pesticides are mostly Imported from abroad, the price is higher, and the effective period after spraying is shorter (only one month). The gas phase White carbon black is used as a carrier to adsorb the insecticide, which has a good sustained release effect. According to the measurement, the effective period after spraying is more than one year.

White carbon black cosmetics

For cosmetics, it is required to have strong UV shielding ability, which can protect against the harmful effects of ultraviolet (UVB) on the human body and also protect against ultraviolet long wave (UVA). In essence, the ultraviolet shielding includes two aspects, one is the absorption of ultraviolet rays as described above, and the other is the reflection of ultraviolet rays. Currently, the anti-ultraviolet agent developed from the viewpoint of ultraviolet reflection performance in the world has not been reported. In the sunscreen products, organic compounds have been frequently used as ultraviolet absorbers. However, in order to protect the skin from ultraviolet rays as much as possible, the amount of skin cancer and chemical allergy may increase, and the gas phase White carbon black is Inorganic component, easy to be distributed with other groups of cosmetics, non-toxic, odorless, does not have the above problems, and is white in itself, can be easily colored, especially valuable in the gas phase White carbon black, strong UV resistance, good stability, It does not decompose after UV irradiation, does not change color, and does not chemically react with other components in the formulation. These outstanding features of the gas phase White carbon black have laid a good foundation for the upgrading of sunscreen cosmetics.

White carbon black antibacterial material

Using the large specific surface area, super-porous structure and superb adsorption capacity and singular physicochemical properties of the gas white white black, functional ions such as silver ions are uniformly designed into the mesopores of the gas white black surface and stabilized. Successfully developed high-efficiency, long-lasting, high-temperature, broad-spectrum antibacterial nano antibacterial powder (particle size is only about 70 nanometers), which not only fills the domestic gap, but also the main technical indicators have reached or exceeded similar products in Japan. After testing, when the concentration of nano antibacterial powder in water is only 0.315%, the antibacterial ability of Gram-positive representative strains and Gram-negative representative strains can be clearly revealed, and the inhibition zone appears 2— 3mm, and with the increase of the concentration of nano antibacterial powder in water, the inhibition zone increased significantly. It has been determined that when the water contains Ag+ of 0.01 mg/1, it can completely kill E. coli in water and can maintain new flora for up to 90 days. The nano antibacterial powder is applied to the enamel glaze to produce a drum washing machine with anti-mildew and antibacterial functions, and the antibacterial rate is over 99%. It should be pointed out that the nano antibacterial powder is used in enamel glazes in harsh conditions. It must maintain strong antibacterial properties after burning in a highly alkaline liquid and high temperature (about 900 °C). This is another antibacterial powder. Unpredictable. The nano antibacterial powder is added to the interior wall paint to produce an interior wall paint with long-lasting antibacterial and mildew resistance. The nano antibacterial powder is used in women's underwear detergent, wool, cashmere detergent, detergent, hand soap, and tested by the health and epidemic prevention department, and its antibacterial performance is very remarkable. It can be foreseen that with the enhancement of people's health awareness, nano antibacterial powder will gradually be accepted by the general public of relevant application enterprises, and it will emerge in the industries of bills, chemical building materials, home appliances, functional fibers and plastic products.

White carbon black other