Hydrad F Aluminium trihydroxide 21645-51-2 Huber Engineered Materials Flame and Smoke Retardants >> Aluminium trihydrate Rubber - Elastomer (Chloroprene, Butyl …) ADHESIVE SEALANT ATH provides smoke suppressance and flame retardance. Huber ATH products are available in a wide range of surface areas and also provide for improved physical properties.Huber's treatment capabilities allow the formulator to increase the loading of ATH without building viscosity, also allowing for improved dispersability. Huber manufactures both precipitated and ground ATH. The principal properties alumina trihydrate (ATH) imparts are flame retardance and smoke suppression. Of the common products used in plastics and other polymers, only ATH has flame retarding and smoke suppression benefits as well as being an economical resin extender. Superior Flame Retardant and Smoke Suppression Huber Engineered Materials creates superior alumina trihydrate-based mineral solutions for use in the paint, paper, plastics, rubber, adhesives and wire and cable industries. Huber offers a very broad line of alumina trihydrate (ATH) products differentiated by particle size and surface area. Alumina trihydrate is the largest volume flame retardant used in the world. Also known as ATH and hydrated alumina, it is technically aluminum hydroxide, with the chemical formula Al (OH)3. At room temperature, ATH is very stable; however, when temperatures reach 428oF (220oC), it begins to undergo an endothermic decomposition. Between temperatures of 401oF (205oC) and 428oF (220oC), this decomposition occurs slowly. But, above 428oF, the decomposition becomes very rapid and the hydroxyl groups of the ATH begin to decompose endothermically. It is this endothermic decomposition which is the flame retardant mechanism for ATH when it is incorporated into polymers. The combustion of polymers is retarded by ATH because it acts as a heat sink and absorbs a portion of the heat of combustion. Also, water that is released during this decomposition dilutes the combustible gases. This makes combustion more difficult and acts as a vapor barrier to prevent oxygen from reaching the flame. It is also believed that the aluminum oxide (Al2O3) formed during this decomposition forms an insulating barrier on the surface of the burning polymer which acts to insulate the polymer from fire. 2Al(OH)3--------Al2O3 +3H2O Aluminium trihydroxide (ATH). Used as a resin extender and to provide superior smoke suppression and flame retardance in industrial adhesives and sealants. Allows increased loading without building viscosity. Provides improved dispersability. Offers very good stability at room temperature.