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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