With the continuous development and wide application of polymer materials, the demand for flame retardant is also constantly improving, at the same time, flame retardant technology is constantly updated and developed. Among various types of flame retardants, magnesium oxide is a new kind of environmentally friendly inorganic flame retardant, and light magnesium oxide is a classification of magnesium oxide.

Magnesium oxide according to the different volume, there are light magnesium oxide and heavy magnesium oxide classification, light magnesium oxide used in metallurgy, smelting, advanced magnesium brick, refractories and moisturizing materials manufacturing, and other types of inorganic flame retardant, has a better smoke suppression effect, but also has the flame retardant, dropproof, filling multiple functions. Many people may be wondering why magnesium oxide can be used as a flame retardant and how it can achieve the flame retardant effect. Today I'm going to tell you why light magnesium oxide can be used as a flame retardant.

Light magnesium oxide is a white amorphous powder which is odorless, tasteless and non-toxic. It is difficult to dissolve in water, insoluble in alcohol, soluble in acid or ammonium salt solution, in the water solubility increases with the CO2 content in the water, melting point is 2852 ℃, boiling point is 3600 ℃, 1000 ℃. The above high temperature burning, can be converted into crystals. When the temperature rises to above 1500 ℃, then into dead burned magnesia and sintered magnesia. It absorbs carbon dioxide from the air and water to form basic magnesium carbonate.

When the light magnesium oxide is heated, the decomposed material can absorb the heat when the fire occurs, prevent the temperature from rising, and release a large amount of water to dilute the oxygen on the surface of the combustible material. The decomposed active magnesium oxide adheres to the surface of the combustible material and further prevents the combustion.