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ALUMINIUM TRIHYDRATE (ATH) |
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Alumina Trihydrate (AI2O3o3H2O)
is the most widely used flame retardant in the world due to its
versatility and low cost. Available in different particle sizes, it can
be used in a wide range of polymers at processing temperatures below 220°C.
AI2O3o3H2O + HEAT -->
AI2O3 + 3H2O
- ATH is non-toxic, halogen-free, chemically inert, and has low
abrasiveness.
- Additional benefits are arc and track resistance in plastics
exposed to electrical arcing, acid resistance, and smoke
suppression.
- At about 220°C, ATH begins to decompose endothermically
releasing approximately 35% of its weight as water vapour.
- Alumina Trihydrate acts as heat sink thereby retarding pyrolysis
and reducing the burning rate.
- The water vapour released has an added effect of diluting
combustion gases and toxic fumes.
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