Mg(OH) 2≥ 98% Flame Retardant High Purity 325 mesh pass ≥99.85 %Magnesium Hydroxide Mg(OH)2 For Fire Retardant Coating

Application
 
Thermal decomposition and temperature reduction
Magnesium hydroxide undergoes a decomposition reaction when heated, absorbing a large amount of heat. This process helps to reduce the surface temperature of the material, thus slowing down the combustion process. Its decomposition temperature ranges from 340-490°C, making it suitable for polymers processed at high temperatures.
 

Release of water and dilution of oxygen

During decomposition, magnesium hydroxide releases bound water. This water further absorbs heat and dilutes the oxygen concentration, helping to inhibit flame spread. Water vapor covering the surface of the material also reduces the oxygen concentration in the air at the burning surface, thus impeding combustion.

Generation of high temperature resistant magnesium oxide protective layer

Magnesium oxide (MgO) produced by the decomposition of magnesium hydroxide has excellent refractory properties. Magnesium oxide is able to cover the surface of the material, forming a protective wall that insulates oxygen and combustibles, thus effectively preventing the spread of combustion. This protective layer also promotes charring of the polymer material, forming a charred layer to block heat and air entry.

Smoke suppression and toxicity reduction

Magnesium hydroxide significantly reduces the production of smoke during the flame retardant process, which is critical to the problem of low visibility and inhalation of toxic fumes during fires. In addition, acidic gases (e.g., sulfur dioxide, nitrogen oxides, etc.) produced during combustion can be neutralized by magnesium hydroxide, reducing the hazards of these toxic substances.
 
Specification
 

Items	Specification	Result
Mg(OH)2 Content %	≥98	98.48
Loss on ignition(800℃)%	≥30	31.77
Fe %	≤0.005	0.001
Cl- %	≤0.6	0.35
Particle size D50 μm	≤2	1.828
325 mesh pass %	≥99.85	99.9
Whiteness≥%	≥97	98.95

 

Service and Shipping

The environmental-friendly and high-quality products of Zehui group are made from abundant natural resources and sea water. Its production plant Shandong Xinzehui is certified with ISO 9001: 2015 quality system, with an annual production capacity of 100,000MT. With manufacturing experience for over 50 years, Zehui has got excellent reputation in the market, and has been consistently providing good quality and credible service to valued customers all over the world.