Flame-Retardant Aluminum Hydroxide: How to Select Flame-Retardant Aluminum Hydroxide

Flame-retardant aluminum hydroxide offers advantages such as non-toxicity, excellent stability, and the absence of toxic gases at high temperatures.

Flame-retardant aluminum hydroxide offers advantages such as non-toxicity, excellent stability, and the absence of toxic gases at high temperatures. It reduces smoke and soot emissions during plastic combustion and exhibits a low dehydration endothermic temperature. Flame-retardant polyolefins containing 60% aluminum hydroxide can be used as construction materials and interior decoration materials for automobiles and ships.

Aluminum hydroxide used as a flame retardant in domestic and international markets is primarily aluminum hydroxide trihydrate (ATH), typically denoted as α-Al₂O₃·3H₂O. It exists as a crystalline or amorphous white powder. Its crystal structure comprises tightly packed base ions in an AB bilayer arrangement, with aluminum ions stacked atop the 9s base ions. All resulting octahedral voids remain unfilled. Thus, the closely packed meridian ions form a layered structure, with adjacent layers connected by hydrogen bonds formed by the meridian ions.

The thermal dehydration and phase transitions of flame-retardant aluminum hydroxide are highly complex. When aluminum hydroxide is used as a flame retardant, its quality indicators should be selected based on the thermal decomposition temperature and processing temperature requirements of the polymer matrix material.

Modified flame-retardant aluminum hydroxide is one of the halogen-free flame retardants for synthetic materials. It possesses three major functions: flame retardancy, smoke suppression, and filling. It produces no secondary pollution during combustion. Not only does it exhibit excellent dispersibility in polymers, but it is also widely used in electrical appliances, wires, cables, daily necessities, building materials, transportation, and other plastic and rubber products.

In domestic and international markets, flame-retardant aluminum hydroxide primarily exists as the trihydrate aluminum hydroxide trihydrate (ATH), typically denoted as α-Al₂O₃·3H₂O. It appears as a crystalline or amorphous white powder. Its crystal structure comprises tightly packed base ions in an AB double-layer form, with aluminum ions stacked atop the 9s base ions. All resulting octahedral voids remain unfilled. Thus, the closely packed meridian ions form a layered structure, with adjacent layers connected by hydrogen bonds formed by the meridian ions.

The thermal dehydration and phase transitions of flame-retardant aluminum hydroxide are highly complex. When aluminum hydroxide is used as a flame retardant, its quality indicators should be selected based on the thermal decomposition temperature and processing temperature requirements of the polymer matrix material.

Flame-retardant aluminum hydroxide is one of the halogen-free flame retardants for synthetic materials. It possesses three primary functions: flame retardancy, smoke suppression, and filling. It produces no secondary pollution during combustion. Not only does it exhibit excellent dispersibility in polymers, but it is also widely used in electrical appliances, wires, cables, daily necessities, building materials, transportation, and other plastic and rubber products.

Selecting flame-retardant aluminum hydroxide requires attention to quality indicators. It offers advantages such as non-toxicity, excellent stability, and the absence of toxic gases at high temperatures. It reduces smoke and soot during plastic combustion, absorbs heat during dehydration, and maintains low temperatures. Flame-retardant polyolefins containing 60% aluminum hydroxide can serve as construction materials and interior decoration materials for automobiles and ships.