Several commonly used flame retardant and its flame retardant principle

Several commonly used flame retardant and its flame retardant principle

1. halogen flame retardant:

This is the most commonly used as a flame retardant, the flame retardant principle is halogen-containing flame retardant in the case of fuming hydrogenated acid, this is non-flammable gas, the proportion of heavy fuel exists in the surrounding, from the role of oxygen ; In addition, the halogen flame retardant also has the role of capturing OH roots.

2. Phosphorus (boron) flame retardant:

Phosphorus (boron) flame retardant is mainly formed in the combustion of phosphorus (boron) acid non-flammable liquid film, the boiling point of up to 300 ° C; while phosphoric acid and further production of metaphosphoric acid, it is a very stable solid Polymeric, covered in the fuel, this liquid and solid phase cover isolated oxygen, to prevent the combustion.

3. Antimony trioxide and halogen flame retardant and use:

And the mechanism can be considered because the solid polymer dehydration and carbonization to make it with oxygen isolation; and gaseous state to prevent combustion is the role of oxidants.

4. Hydroxide Flame Retardant:

Commonly used in the case of magnesium hydroxide and hydrogenation, the hydroxide (containing crystal water) emits crystal water at 220-300 ° C and absorbs a considerable latent heat of vaporization, cooling the combustibles while producing water vapor The role of air flame retardant. The biggest advantage of this type of flame retardant can be used to prepare low smoke halogen-free flame retardant cable material.

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