Aluminum hydroxide (Aluminium hydroxide), also known as aluminum trihydrate (ATH), is a widely used inorganic flame retardant. Its fire-retardant effects are mainly reflected in the following aspects: Endothermic action: Aluminum hydroxide begins to decompose and absorb heat at temperatures between 200°C and 300°C, releasing crystalline water. This endothermic process can lower the temperature of polymers, thereby slowing down their thermal decomposition and burning rate. Dilution effect: The water vapor produced by decomposition can dilute oxygen and combustible gases in the combustion area, reducing their concentration and inhibiting the combustion reaction. Coverage effect: The aluminum oxide (Al2O3) generated after the decomposition of aluminum hydroxide can form a protective layer on the surface of the polymer, which can isolate oxygen and prevent further burning. Carbonization effect: Aluminum hydroxide can promote the formation of a carbonized layer on the surface of the polymer under combustion conditions. This carbonized layer can block the transfer of heat and oxygen, suppressing the burning process. The application areas of aluminum hydroxide flame retardants are very extensive, including plastics, rubber, coatings, building materials, electronics industry, etc. In plastic products, the addition amount of aluminum hydroxide usually needs to reach a certain proportion to show good fire-retardant effects. In addition, aluminum hydroxide can be used together with other flame retardants such as magnesium hydroxide, red phosphorus, etc., to produce synergistic effects and improve fire-retardant performance. To improve the compatibility and dispersion of aluminum hydroxide with polymers, it is often subjected to surface modification treatment, such as using coupling agents or surfactants for processing, to reduce its usage and improve fire-retardant effects. In summary, aluminum hydroxide, as an environmentally friendly, non-toxic, non-corrosive, and low-cost inorganic flame retardant, plays an important role in the field of flame retardancy of high molecular materials.
Quality Index
Serial Number
Project
Unit
Index
1
AL(OH)3
%≥
99.6
2
Al203
%≥
64.5
3
SiO2
%<
0.04
4
Fe203
%<
0.03
5
Na20
%<
0.3
6
Whiteness ratio
%≥
97
7
Caustic soda
%
34.5±0.5
8
granularity
Particle%
≤2um≥85
D50um
≤1.0
Aluminum hydroxide (Aluminium hydroxide), also known as aluminum trihydrate (ATH), is a widely used inorganic flame retardant. Its fire-retardant effects are mainly reflected in the following aspects: Endothermic action: Aluminum hydroxide begins to decompose and absorb heat at temperatures between 200°C and 300°C, releasing crystalline water. This endothermic process can lower the temperature of polymers, thereby slowing down their thermal decomposition and burning rate. Dilution effect: The water vapor produced by decomposition can dilute oxygen and combustible gases in the combustion area, reducing their concentration and inhibiting the combustion reaction. Coverage effect: The aluminum oxide (Al2O3) generated after the decomposition of aluminum hydroxide can form a protective layer on the surface of the polymer, which can isolate oxygen and prevent further burning. Carbonization effect: Aluminum hydroxide can promote the formation of a carbonized layer on the surface of the polymer under combustion conditions. This carbonized layer can block the transfer of heat and oxygen, suppressing the burning process. The application areas of aluminum hydroxide flame retardants are very extensive, including plastics, rubber, coatings, building materials, electronics industry, etc. In plastic products, the addition amount of aluminum hydroxide usually needs to reach a certain proportion to show good fire-retardant effects. In addition, aluminum hydroxide can be used together with other flame retardants such as magnesium hydroxide, red phosphorus, etc., to produce synergistic effects and improve fire-retardant performance. To improve the compatibility and dispersion of aluminum hydroxide with polymers, it is often subjected to surface modification treatment, such as using coupling agents or surfactants for processing, to reduce its usage and improve fire-retardant effects. In summary, aluminum hydroxide, as an environmentally friendly, non-toxic, non-corrosive, and low-cost inorganic flame retardant, plays an important role in the field of flame retardancy of high molecular materials.
