There are many kinds of halogen-free flame retardants, which can be divided into inorganic and organic flame retardants. It can be divided into magnesium-aluminum, phosphorus, nitrogen, phosphorus-nitrogen, silicon, antimony, boron, molybdenum and expandable graphite. At present, halogen-free flame retardants are mainly phosphorus (phosphine) esters (including halogenated derivatives), zinc borate, aluminum hydroxide, magnesium hydroxide flame retardant, red phosphorus and antimony trioxide.
Magnesium is a key industrial metal that can be extracted from different series of base materials. while magnesite is one of the key sources of magnesium compound extraction.
A Brief Discussion on the Basics of Magnesite and Its Current Development and Application
The addition of non-metallic compounds to polymer materials as fillers and flame retardant materials can not only reduce the production cost, but also reduce the combustion performance of polymer materials and kill two birds with one stone. as inorganic flame retardant filler, magnesium hydroxide flame retardant has the characteristics of non-toxic, non-smoking, non-halogen, non-corrosive and good thermal stability. Because of the safety and environmental protection characteristics of magnesium hydroxide, it is widely used in plastics, cables, rubber and other industries.
Magnesium oxide formed by decomposition is a good refractory material, which can also help improve the fire resistance of synthetic materials. At the same time, the water vapor it emits can also be used as a smoke suppressant.
With the development of polymer material industry, there are more and more fiber, resin, chemical, construction, transportation, rubber and other synthetic materials, but most polymers are flammable materials. In many application fields, in order to prevent fire, flame retardants need to be added to polymer materials.
Magnesite is mainly used in the following industries:
Analysis of advantages and disadvantages of commonly used flame retardants, development status
Magnesium hydroxide flame retardant is a new type of filled flame retardant. By releasing bound water and absorbing a lot of latent heat during thermal decomposition, magnesium hydroxide flame retardant can reduce the surface temperature of the synthetic material filled with it in the flame, and can inhibit the decomposition of polymer and cool the combustible gas produced.