Flame Retardants Magnesium Hydroxide Used for PVC

Magnesium hydroxide flame retardant features: In addition to the considerable impact on the environment, magnesium hydroxide compared with aluminum hydroxide, thermal reaction, decomposition temperature, suitable polymer, flame retardancy, smoke suppression ability, acid Stability and Other aspects, magnesium hydroxide flame retardants are better than aluminum hydroxide flame retardants, but also better than the traditional halogen, phosphorus flame retardants. Specific performance: (1) the flame retardant mechanism of both similar. The thermal decomposition process of magnesium hydroxide and aluminum hydroxide is as follows: gaseous water generated by pyrolysis can cover the flame, expel O2 and dilute the combustible gas, and form a thermal insulation layer on the plastic surface in contact with the flame to prevent the flow of the combustible gas and prevent Flame spread, which is similar to the carbonization of phosphorus flame retardants.

Magnesium hydroxide is a new type of filler-type flame retardant, which releases the bound water by thermal decomposition and absorbs a large amount of latent heat to reduce the surface temperature of the composite material filled by it in the flame, and has the effect of inhibiting the polymer from decomposing and reacting The resulting combustible gas cooling effect.






 

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