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Flame Retardant Mechanism of Magnesium Hydroxide Flame Retardant

Magnesium hydroxide decomposes and absorbs heat from the burner surface to flame retardant when heated (340-490 degrees). At the same time, it releases a large amount of water to dilute oxygen on the burner surface. The decomposed active magnesium oxide adheres to the burner surface and further prevents combustion. Magnesium hydroxide not only does not produce any harmful substances in the whole flame retardant process, but also can absorb harmful gases and smoke generated by the combustion of rubber, plastics and other polymers in large quantities. Activated magnesium oxide continuously absorbs incomplete combustion melting residues, so as to eliminate smoke and prevent droplets while quickly stopping combustion, it is a new development. Environmental friendly inorganic flame retardant.

Flame retardants can be divided into organic flame retardants and inorganic flame retardants according to their chemical composition. Organic flame retardants are divided into two series: phosphorus series and halogen series. Organic flame retardants are gradually being replaced by inorganic flame retardants due to their high toxicity and smoke.

The main varieties of inorganic flame retardants are aluminium hydroxide, magnesium hydroxide, red phosphorus, antimony oxide, tin oxide, molybdenum oxide, ammonium molybdate, zinc borate and so on. Among them, aluminium hydroxide and magnesium hydroxide can absorb heat by decomposition and produce hydrogen oxide, which can isolate air. The oxides after decomposition are high temperature resistant substances. Therefore, the two flame retardants can not only play a flame retardant role, but also play a filling role. Charging, it has no corrosive halogen and harmful gas, no volatilization, lasting effect, non-toxic, smokeless, non-dripping and other characteristics.

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