Product Description
Silica
Silica is also known as hydrated silica. The chemical formula is SiO2·nH2O. It is a white, non-toxic, amorphous and fine powdered inorganic silicon compound with porosity, high dispersibility, light weight, and good chemical stability. It has excellent properties such as high temperature resistance, non-combustibility, and good electrical insulation. It has been widely used in many fields such as plastics, rubber, papermaking, coatings, dyes and inks.
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Name
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Precipitated Silica
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Appearance
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White Color powder
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Production Process
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Precipitation
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Degree of White
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≥97
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SiO2 content(dry basis)%
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≥96
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PH Value
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6.5-7.5
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Specific surface area (㎡/g)
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200-220
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Oil absorption value (ml/100g)
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360-380
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Dry reduction (150℃,2h)%
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4.0-5.0
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Burn reduction (950℃,2h)%
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6.0-8.0
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Particle Size (nm)
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400
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Classification of Silica
There are two ways to classify Silica, According to the manufacturing method, it is divided into precipitated silica and meteorological silica;According to the market, silica is divided into meteorological silica, ordinary precipitated silica and highly dispersed precipitated silica.
Application
In tires
Silica is used as a reinforcing agent, and the largest amount is in the rubber field, which accounts for 70% of the total. White carbon black can greatly improve the physical properties of the rubber, reduce the lag of the rubber, and reduce the rollin resistance of the tire without losing its wet skid resistance. In the rubber industry, carbon black is a very effective reinforcing agent.Adding silica to the tread rubber of tires can improve the cutting and tear resistance of the tread, and reduce popping and falling blocks. Compared with the rubber filled with white carbon black, the rolling resistance can be reduced by 30%.
In paint, coating
Silica can be used as a rheological additive, anti-settling agent, auxiliary dispersant, and matting agent in paint production,and has the functions of thickening, anti-settling, thixotropy, and matting. It can also improve the weather resistance and scratch resistance of the coating, increase the adhesion strength between the coating and the substrate and the hardness of the coating, improve the anti-aging property of the coating, and improve the UV absorption and infrared light reflection characteristics.
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