Comparison of two methods for modification of aluminum hydroxide
Aluminum hydroxide is a relatively common chemical product and is used as a flame retardant in many fields. Just, in order to better use, so that aluminum hydroxide can be more widely used in flame retardant raw materials, it is necessary to do some modification of its surface.
aluminum hydroxideIt is a relatively common chemical product and is used as a flame retardant in many fields. Just, in order to better use, so that aluminum hydroxide can be more widely used in flame retardant raw materials, it is necessary to do some modification of its surface.
1. Dry modification method
After the superfine aluminum hydroxide powder is preheated to the specified temperature, the modified liquid is gradually dripped into the rapidly stirred aluminum hydroxide powder, then the timing is started, and the power supply is turned off and packaged after the specified time.
The advantages of dry modification are small demand for machines and easy operation. The disadvantage is that the labor force of workers is high, it is also a bit polluting the environment, the processing efficiency is low, the coating ratio of aluminum hydroxide powder is small, only 10%, and the effect of modification is not good and unstable.
2. Wet modification method
In this way, during the processing of aluminum hydroxide powder, the synthesized aluminum hydroxide slurry is filtered and cleaned, then the filter cake is slurried, some modified liquid is put into the slurry treated liquid at a fixed temperature, stirred for a while, filtered, dried and scattered before packaging.
The advantage of wet modification is that the labor force of workers is relatively small, there is basically no dust pollution, and the processing efficiency is relatively high. The coating ratio of aluminum hydroxide powder is relatively high, ranging from 20% to 30. The efficiency of modification is very high, and the enthusiasm is relatively stable. Compared with dry modification, wet modification procedures are more, and the demand for machines is relatively large.
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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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