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| ALUMINA TRIHYDRATE |
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Alumina Trihydrate (ATH or hydrated alumina) is a non-toxic, non-corrosive, flame retardant and smoke suppressant utilized in elastomeric applications.
It is the most frequently used flame retardant in the world.
ATH is a very effective flame retardant due to its thermodynamic properties which absorb heat and release water vapor.
Alumina trihydrate releases its 35% water of crystallization as water vapor when heated above 205'C.
The resulting endothermic reaction cools the product below flash point, reducing the risk of fire and acts as a vapor barrier to prevent oxygen from reaching the flame.
Typical loadings vary from 20 phr to 150 phr.
Because many polymers like polyethylene and polypropylene process above 200'C, these olyolefins should use magnesium hydroxide as a flame retardant filler since its water of hydration releases at approximately 325'C. |
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Chemical Decomposition: Al(OH)3 ® Al2O3- 3H2O
Al(OH)3: 99.2%
Loss on Ignition: 34.6%
SiO2 : 0.005%
Fe2O3 : 0.007%
Na2O: 0.30% |
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