FlameGard ATH Aluminium trihydroxide Alcoa Flame and Smoke Retardants >> Aluminium trihydrate Rubber - Elastomer (Chloroprene, Butyl …) PU - Prepolymers Polyvinyl acetate emulsions & derivatives (PVAc…) Polyvinyl Chloride (PVC) ADHESIVE Alcoa FlameGard ATH (aluminum trihydroxide) is an inorganic hydrated alumina designed for use in polymer systems as a flame and smoke supressive additive. FlameGard is more accurately designated chemically as aluminum trihydroxide, Al(OH)3, and is produced through processing of alumina-bearing feedstocks. Although FlameGard is a dry powder, it contains a high proportion, approximately 35 percent by weight, of chemically combined water. FlameGard is a nonabrasive, low density material with a Mohs’ hardness index of 2.5 - 3.5 and a specific gravity of 2.42g/cc. Alcoa Bayer processed ATH has good purity, color and reactivity. FlameGard ATH is a ground Bayer precipitated alumina designed for specific application in polymeric adhesive backing of tufted carpeting to provide a level of flame retardancy to the carpet system. It is approximately 99.5 percent pure aluminum oxide with three molecules of H2O chemically combined as water of hydration. It is specially ground to maintain relatively coarse particle distributions in the median range of 22 to 26 microns and provides a high loading potential in high viscosity backing compounds. FlameGard ATH has a slight off-white or ivory color that is acceptable in most applications. FlameGard imparts fire retardant properties to a polymer/ATH filled system because it has a high proportion of chemically combined water by weight (34.6 percent) attached to each hydrate molecule. This “water of hydration” is stable to the processing temperatures of most polymer coated textiles. On heating to higher temperatures, e.g. by exposure to flame, FlameGard will and thereby absorb a considerable amount of heat. This sacrificial absorbtion of heat significantly reduces the heat available to decompose the textile polymer materials into gaseous fuel elements necessary to sustain combustion. FlameGard is also nonsmoking. It decomposes into an inert material, anhydrous alumina, and water. Its presence in a polymer system can substantially lower smoke production levels when compared to flame-retardant polymers based on phosphates or on brominated or chlorinated paraffin/antimony trioxide filled systems. Primary applications are in the film forming binders based on polymers and copolymers. thylene vinyl acetate (EVA) Natural latex Polyurethane Polyvinyl acetate (PVA) Polyvinylidene chloride (PVDC) Styrene-butadiene rubber (SBR) Vinylidene Chloride Inorganic hydrated alumina. Used in polymer systems as a flame and smoke supressive additive for specific application in polymeric adhesive backing of tufted carpeting. Provides a level of flame retardancy to the carpet system. Can lower smoke production levels when compared to flame-retardant polymers based on phosphates or on brominated or chlorinated paraffin/antimony trioxide filled systems.