Magnesium hydroxide flame retardant by what principle of preparation?
Magnesium hydroxide, alias caustic magnesite, light burned magnesia, etc., is an important chemical in our lives, which is used in various industries. One of the more typical role is as a flame retardant, protecting us.
Magnesium hydroxide, Alias caustic magnesite, light burned magnesia, etc., is an important chemical product in our lives, which is used in various industries. One of the more typical role is as a flame retardant, protecting us.
Magnesium hydroxide flame retardant products, instead of traditional flame retardant products, have a very good smoke suppression effect, and all flame retardant process without the occurrence of any harmful substances, the damage to the human body is small. Therefore, the use of magnesium hydroxide flame retardant range continues to expand. The following will introduce how to prepare the commonly used flame retardant magnesium hydroxide.
1. Physical destruction method
Magnesium hydroxide flame retardant with dry or wet method of brucite or chemical production of magnesium hydroxide damage to 1~5 microns. The finer the particle size, the better the flame retardant effect, together will not affect the strength of the polymer.
2. Hydrothermal synthesis method
The magnesium hydroxide colloid was reacted under hydrothermal conditions of 140~180 ℃. A flame retardant magnesium hydroxide with a particle size of about 1 to 2 microns is obtained.
3. Water is legal
The magnesium oxide is hydrated in a special hydrating agent solution to obtain magnesium hydroxide with a particle size of about 1 to 5 microns. Foreign excellent flame retardant magnesium hydroxide is usually produced by the latter two methods. It has the advantages of fine granularity, smaller than appearance and good tracing. Hydrothermal method technology is simple, good quality, but the production cost is high. Water legal relative technology is very complex, but the production cost is low.
The above is the preparation method of magnesium hydroxide flame retardant, hoping to be helpful to everyone.
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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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