LONGECITY

Development of magnesium hydroxide of high thermal decomposition temperature, initial temperature of 340 ℃, 490 ℃ when complete decomposition, thermal decomposition, because of its high decomposition temperature, wide range of total amount is 44.8 KJ/mol, and the absorption of heat, are higher than other aluminum hydroxide flame retardant, so have a good flame retardant effect. For the flame retardant mechanism under the condition of heating, can be expressed in the following equation: Mg (OH) 2 - MgO style + H2O - Q, judging by the reactive aluminum hydroxide flame retardant polymer on the thermal decomposition of release water of crystallization, at the same time to absorb a large number of latent heat, thus inhibiting the flame retardant polymer temperature rise, and delay the thermal decomposition of polymers and reduce the combustion rate.

Releasing water of crystallization in the process of aluminum hydroxide flame retardants decomposition into water vapor in the high temperature, reduce the oxygen near the surface of the polymer and the concentration of combustible gas, to some extent, prevent burning of the polymer surface; Second, magnesium hydroxide in carbonized layer on the surface of polymer material, preventing oxygen and heat into; Product decomposition of MgO style at the same time is also a good refractory material, improve the flame resistance of polymer material, cut off the air to prevent burning. Because magnesium hydroxide in the process of heating with the above characteristics, so the effect of aluminium hydroxide is the ideal inorganic flame retardants, its application field will be increasing.