Although the brominated flame retardants in organic flame retardants have many advantages such as high flame retardant efficiency, low addition, and wide application range. However, in order to comply with the development trend of high flame retardant, low smoke and harmless in the flame retardant market, the development and utilization of inorganic flame retardants has gradually received more auxiliary support.
Ultrafine aluminum hydroxide has stable physical and chemical properties at room temperature. There is no secondary pollution in the combustion process. High whiteness. Excellent chroma index. In addition, nano-aluminum hydroxide can not only improve the oxygen index and flame retardant properties of flame retardant polymers. It also helps to improve the surface finish, mechanical and electrical properties of polymer products, and enhance their resistance to leakage, arc resistance and wear resistance. In addition, the composite application effect of aluminum hydroxide and other flame retardants is very ideal. It is a promising inorganic flame retardant.
1, aluminum hydroxide flame retardant, referred to as ATH. The principle of flame retardant is that aluminum hydroxide is decomposed by heat to release crystal water. This process is a strongly endothermic reaction. Absorbs a lot of heat. The polymer may be cooled. At the same time. The water vapor produced by the reaction can dilute the combustible gas. Stop the spread of burning.
2. The new refractory metal oxide Al2O3 has high activity. It can catalyze the thermal oxygen crosslinking reaction of the polymer. And a carbonized film is formed on the surface of the polymer. The carbonized film will weaken the heat and mass transfer effect in the combustion process. Thus play a flame retardant effect. Al2O3 can also adsorb soot particles. Play a role in smoke suppression.
3. The chemical formula of aluminum hydroxide is Al(OH)3. It is the hydroxide of aluminum. Aluminum hydroxide can react with acid to form salt and water. Reactions with strong bases to form salts and water. So it's hydroxide. Because it has a certain acidity. Therefore, it is also called aluminum acid (H3AlO3).
4. Aluminum hydroxide flame retardant has anti drip. Promote carbonization. Not volatile. Not permeable. Long-term retention of functionality in the polymer. And has the characteristics of non-toxic, good stability. No toxic gases are produced at high temperatures. When burning, it can also reduce the amount of smoke from the plastic. It has the advantages of low price and wide source.