Inorganicflame retardantThere are many types, of which aluminum hydroxide and magnesium hydroxide are the main force, especially when halogen-free flame retardant is advocated in some fields, they will become the first choice. Due to inorganicflame retardantThe amount that needs to be added is very large, and in some special cases it will exceed the amount of the polymer itself. Therefore, it is bound to have a very large impact on the physical and mechanical properties of the polymer, which requires the treatment of inorganic flame retardants. That is, microparticization and surface activation.

The purpose of microparticlization is to make them evenly dispersed in the polymer and play a flame retardant role in the bulk phase. Experiments show that to achieve the same flame retardant standard, the amount of microparticle can be reduced appropriately.

Surface activation is to make the inorganic flame retardant and good compatibility between the polymer, which can reduce the mechanical strength of the polymer itself due to the addition of a large number of inorganic flame retardants.

Recently, some articles talk about the flame retardant advantages of inorganic nanoparticles. Our work experience believes that the addition of these nanoparticles may be beneficial to improve the mechanical strength, but it will not have much impact on the flame retardant performance. Because the flame retardant mechanism of inorganic flame retardant is to reduce the temperature of the system by decomposing and releasing water vapor by heating, and at the same time, water vapor dilutes flammable gas to achieve the flame retardant effect, it is determined by the amount of water vapor. Therefore, it is related to the amount of flame retardant and has nothing to do with whether the flame retardant is nano-particles or not. Generally speaking, the particle size of inorganic flame retardant is distributed in2μm5μmBetween is enough.