Flame retardant is a kind of functional additives, give flammable polymer flammability, mainly for polymer materials flame retardant design. Flame retardants can generally be divided into added flame retardants and reactive flame retardants. Magnesium hydroxide is a common flame retardant, which is widely used and favored by users. Anhui fuel new materials to take you to understand its advantages.
Magnesium hydroxide absorbs a large amount of heat during the heating process, reducing the temperature of combustibles below the ignition point. The water vapor released by the reaction can dilute the oxygen on the surface of the combustibles, and the magnesium oxide produced after combustion and dehydration can isolate the air. This is the basic principle of magnesium hydroxide flame retardant. Magnesium hydroxide flame retardant does not contain bromine, chlorine and other halogen elements, has good flame retardant and smoke suppression effect, is the plastic, rubber and other polymer materials ideal low smoke halogen-free filling flame retardant. The decomposition temperature of magnesium hydroxide reaches 340 ℃, which is suitable for products with high molding temperature such as polypropylene, polyethylene, polyethylene, polyethylene, polyethylene, polyethylene, etc. Widely used in wire and cable flame retardant insulation materials, sheath materials, fire filler, injection molding parent materials.
 
Magnesium hydroxide is a kind of inorganic flame retardant and smoke suppression agent with high filling and high addition. The flame retardant mechanism is that when magnesium hydroxide is heated at 340-490 ℃, it decomposes and absorbs the heat on the surface of the combustion substance to achieve the flame retardant effect. At the same time, a large amount of oxygen on the surface of the combustion substance is diluted by water, and the active magnesium oxide produced by decomposition will adhere to the surface of the combustible substance to further prevent combustion. In the entire flame retardant process, magnesium hydroxide does not produce harmful substances, and the decomposition products can absorb a large amount of harmful gases and smoke generated by the combustion of plastics, rubber and other polymers while being flame retardant. Active magnesium oxide continuously absorbs the melting residue of incomplete combustion, and removes smoke and molten droplets while quickly retarding. It is a new environmentally friendly inorganic flame retardant.
Magnesium hydroxide is beneficial to increase the processing temperature of plastics, accelerate the extrusion speed, shorten the molding time, and at the same time, magnesium hydroxide has high decomposition, absorbs combustion heat, and improves flame retardant efficiency. Therefore, compared with aluminum hydroxide, it has obvious advantages. With the increase of polymer processing temperature, the flame retardant effect of easily decomposed aluminum hydroxide is reduced. With the improvement of environmental protection policies, people's awareness of fire safety has increased, and the market demand for magnesium hydroxide flame retardants has shown a rapid growth trend.