Aluminum hydroxide in silicone rubber
In life we see composite arresters, circuit breakers, transformers, high-voltage switches and wall tubes, such as jacket insulation materials, are filled with more aluminum hydroxide methyl silicone rubber as outdoor insulation materials. In the silicone rubber formulation, aluminum hydroxide has a great influence on the mechanical properties, electrical properties, hydrophobicity and flame retardancy of the products. Many years of research has shown that adding aluminum hydroxide filler can improve the performance of silicone rubber, such as leakage mark resistance, electrical corrosion resistance, arc resistance and flashover resistance. However, aluminum hydroxide as an inorganic filler and organic polymer silicone rubber body in the physical form and chemical structure of the difference is very large, both pro
In life we see composite arresters, circuit breakers, transformers, high-voltage switches and wall tubes, such as jacket insulation materials, are filled with more aluminum hydroxide methyl silicone rubber as outdoor insulation materials.
in silicone rubber formulations,aluminum hydroxideIt has a great influence on the mechanical properties, electrical properties, hydrophobicity and flame retardancy of the products. Many years of research has shown that adding aluminum hydroxide filler can improve the performance of silicone rubber, such as leakage mark resistance, electrical corrosion resistance, arc resistance and flashover resistance. However, aluminum hydroxide as an inorganic filler and organic polymer silicone rubber body are very different in physical form and chemical structure, and the affinity between the two is poor, which limits the amount of aluminum hydroxide as a filler in silicone rubber.
The effect of aluminum hydroxide particle size on the mechanical properties of silicone rubber for composite insulators: when the aluminum hydroxide particle size is too small, the particles are difficult to uniformly disperse in the silicone rubber system, resulting in poor mechanical properties; and when the particle size is too large, the mechanical properties are also low due to the smaller specific surface area, and only when the particle size is moderate, its mechanical properties are better.
Effect of aluminum hydroxide particle size on the flame retardancy of silicone rubber for composite insulators: When the particle size is small, it is difficult for aluminum hydroxide to be evenly distributed in the silicone rubber system, resulting in poor flame retardancy, and when the particle size is too large, the compatibility of aluminum hydroxide with the silicone rubber organic system is poor, which can also lead to poor flame retardancy.
Because silicone rubber has the characteristics of high temperature resistance, weather resistance, ozone resistance, corona resistance and good electrical insulation performance, it has been more and more widely used in electrical insulation systems in recent years. It is believed that the development prospect of aluminum hydroxide is still very good.
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Everyone knows that there are two common flame retardants. Today we are going to talk about only one of them. Aluminum hydroxide flame retardant is an environmentally friendly halogen-free flame retardant, which can be widely used in fabrics, wood, plastics, and rubber., Polyurethane and other industries have ideal flame retardant effect. In the process of industrial application, it is found that flame retardant failure occurs when aluminum hydroxide flame retardant is added. The following are the reasons for the failure of aluminum hydroxide flame retardant, how to prevent it, how to deal with the operation, and restore the original function.
As a flame retardant, magnesium hydroxide also need to improve what aspects?
When it comes to flame retardants, everyone is familiar with them. Although we usually have less contact with them, we can know what they are used for from the name. Have to talk about magnesium hydroxide, we all know that its main presentation state is a granular, at present, the market sales of magnesium hydroxide particle size is larger, part of the commodity particle size up to tens of microns, immediately used as a flame retardant, poor dispersion, the physical properties of raw materials greater harm. In industrial production, physical grinding methods are generally used to reduce the particle size to 1 micron. The surface of magnesium hydroxide has high polarity and is easy to agglomerate. As the compatibility of refractory materials and polymer substrates, it not only reduces its flame retardant grade, but also causes more serious harm to the physical properties of raw materials.
Hefei Zhongke Flame Retardant New Material Co., Ltd
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