Aluminum Hydroxide ATH
Aluminum Hydroxide (ATH), CAS 21645-51-2, is a widely used inorganic flame retardant and smoke suppressant.
Description
Aluminum Hydroxide (ATH) is a naturally occurring mineral, often processed into a fine white powder, chemically identified as Al(OH)3. It functions as a non-halogenated flame retardant through an endothermic decomposition process. When exposed to heat, ATH releases molecules of water, thereby cooling the substrate and diluting combustible gases. This decomposition occurs effectively between 180°C and 200°C, a temperature range suitable for many polymer processing applications without premature degradation. Beyond its flame-retardant properties, ATH also acts as a smoke suppressant, reducing the generation of harmful smoke and toxic gases during combustion, which is crucial for safety in confined spaces. Its non-toxic nature, low cost, and ability to be incorporated into various matrices make it an attractive alternative to halogenated flame retardants. The particle size distribution and surface treatment of ATH can be modified to enhance its dispersibility and processing characteristics within polymeric systems, influencing mechanical properties and flame retardancy efficiency. High purity and consistent quality are essential for optimal performance in demanding applications.
Applications
Aluminum Hydroxide is extensively utilized across a multitude of industries. It is a primary flame retardant filler in plastics and rubbers, including PVC, polyethylene, polypropylene, and elastomers, finding use in wire and cable insulation, carpet backing, and construction materials. It is also employed in FRP composites for automotive parts, marine applications, and building panels. Furthermore, ATH is used as a rheology modifier and filler in glues, sealants, and coatings. Its application extends to artificial marble and solid surface materials, where it imparts strength and fire resistance. The pharmaceutical industry uses it as an antacid, and it serves as a raw material in the production of alumina chemicals.
Storage & Handling
Store in a cool, dry, well-ventilated area away from incompatible materials. Keep containers tightly closed. Avoid dust formation. Use appropriate personal protective equipment. Ensure good housekeeping to prevent dust accumulation, which could pose an explosion hazard in specific concentrations.
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