Why does aluminum hydroxide have flame retardant function?


 

Aluminum hydroxide is an additive type flame retardant. When subjected to a high temperature of 235 degrees, a decomposition reaction occurs to produce water and alumina. The change of water into water vapor will take away a lot of heat and reduce the temperature of the synthetic material. The resulting alumina, which has an extremely high surface area, prevents contact between oxygen and organics, resulting in an interruption of combustion.

It should be noted that aluminum hydroxide is an additive flame retardant, what does that mean? That is to say: in plastic synthetic materials, it does not play a major flame retardant role, to reach the V0 level, it also needs to be used with other flame retardants.

Then someone said again, since you can't achieve V0 effect by using it alone, I won't have. Wrong, the purpose of using aluminum hydroxide is to reduce the use of other flame retardants (other flame retardants are expensive), so as to achieve the purpose of reducing product costs.

Aluminum hydroxide is an inorganic flame retardant additive with large amount and wide application. Aluminum hydroxide as a flame retardant can not only flame retardant, but also can prevent smoke, do not produce dripping, do not produce toxic gases, therefore, access to a wider range of applications, the use is also increasing year by year. Scope of use: thermosetting plastics, thermoplastics, synthetic rubber, coatings and building materials and other industries.

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What are the reasons for the failure of flame retardant after adding aluminum hydroxide flame retardant?

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.