Let You Know The Classification Of Flame Retardants.

Most polymer materials belong to flammable, flammable materials, burning heat release speed is large, high calorific value, flame propagation speed, is not easy to extinguish, sometimes will produce smoke and toxic gas, threatening people's life and property safety, so electronic appliances, home building materials and other materials have the corresponding fire standards, adding flame retardant is the main way to achieve polymer flame retardant.
First, the definition of flame retardants.
Flame retardant, also known as flame retardant, refractory or fire retardant, is a kind of additives used to improve the fire resistance of materials, prevent materials from catching fire and inhibit the spread of flame. It helps prevent fires, slows fire spread and reduces heat release, smoke and toxic emissions. The most important thing is to increase the time to escape safely.
Flame retardants date back to 1820. Since the 1960s, flame retardants have gradually been mass-produced and used. So far, flame retardants have developed into the second largest additive after plasticizers.
The flame retardant mechanism of flame retardant mainly includes:
1) Heat absorption: heat decomposition of flame retardant volatile heat absorption, reduce the surface temperature of fuel, flame retardant effect;
2) Covering function: form covering layer after heating, heat insulation and oxygen insulation;
3) Chain breaking reaction: capture free radicals generated by combustion, thus delaying or terminating the combustion reaction;
4) Non-combustible gas asphyxia: heating decomposition of non-combustible gas, dilution of oxygen and combustible gas concentration.
Second, the types of flame retardants.
There are many kinds of flame retardants, which can be divided into organic flame retardants and inorganic flame retardants according to their chemical structure. According to the type of element, it can be divided into halogen system, phosphorus system, nitrogen system, silicon system, Mg-aluminum system, molybdenum system, etc. According to the relationship between flame retardant and flame retardant material, it can be divided into added flame retardant and reactive flame retardant. Below is a general breakdown of flame retardants:
At present, the main flame retardants in use are inorganic, organic phosphorus and organic halide. The performance, flame retardant efficiency, environmental protection and advantages of these three flame retardants are as follows:
One is halogenated flame retardants.