2013年8月7日星期三

The principle of aluminum hydroxide as a flame retardant


aluminium hydroxide (ATH) is applicable to all kinds of plastic acid, halogen-free flame retardants. Both compounds are available on conditions of heat at the following

decomposition reaction: 2Al (OH) 3 ---> Al2O3 + 3H2O
Gaseous phase is considered to cover the aqueous flame, so oxygen can be excluded, and dilution of the combustible gases. Phosphorus-containing flame retardant coke

formation and function similar to that in contact with the flame of a thermal barrier material formed on the surface of the material, reducing the decomposition

products of combustion

The combustion gas flowing in possibilities. In the above reaction, the decomposition of the product non-toxic mineral phase.
Aluminum hydroxide at room temperature, chemical stability, heat up to 220 degrees after the endothermic decomposition, release three crystal water, decomposition,

aluminum hydroxide per gram of absorbing up to 878J, the temperature at 300 degrees, lost two crystal water into a boehmite. More endothermic dehydration

Delay the combustion process of the polymer, aluminum hydroxide equivalent to a heat sink, slow burning rate, and release water vapor, not only dilute the combustion

gases, and is involved in condensed phase reactions, the endothermic decomposition is based on the decomposition of aluminum hydroxide When a lot of heat, and the

In only emit steam when heated to decomposition, and does not produce toxic, flammable or corrosive gas, so the aluminum hydroxid e as a flame retardant fillers, both

filled, flame retardant and smoke triple function, making materials industry of particular concern filler.

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