The synthesis of plastics flame retardants

Multi-flammable plastic and its products, in order to reduce fires, often to add some flame retardants in plastics to improve its anti-flammable. Compared with other additives, flame retardants in the development and application of late start, but its development is quite fast, some countries have been second only to the production of a flame retardant plasticizer it. Therefore, the study and flame retardant technology has become a very important issue.PVC processing aid
With modern high-tech science and technology applications, a veteran of the flame retardants have been far from meeting market demand for its performance, such as halogen-containing flame retardant materials when burned release a lot of hydrogen halide, thus forming a strong corrosive water of halogen acid and cause secondary pollution [2]. Halogen-free flame retardants now growing louder and louder, halogen-containing flame retardants is difficult to get a larger development in the 21st century, while the bound water containing inorganic flame retardants, such as Al (OH) 3, Mg (OH) 2 and other bound miniaturization and nanotechnology to develop in the direction [3,4], a single flame retardants will be complex synergistic flame retardant alternatives, the 21st century will certainly be new flame retardant halogen-free, efficient, low smoke, low toxicity, multifunctional composite flame retardant.flame retardant
Flame retardant mechanism of several typical condensed phase flame retardant mechanism; flame retardant high temperature condensed phase in the polymer surface, cut off from the air, preventing heat transfer and reduce flammable gas emissions, so as to achieve the purpose flame retardant . Formation of condensed phase separation membrane in two ways: First, the temperature in the combustion flame retardants decomposed into non-volatile glassy material, coated on the polymer surface, this dense protective layer insulation film played a role, such as halogenated boron and phosphorus-based flame retardants with similar characteristics; second is to use a flame retardant polymer surface thermal degradation products to promote rapid dehydration carbide, carbide layer is formed, the use of elemental carbon evaporation does not produce a flame burning combustion and decomposition, to stop Burning protective effects, such as phosphorus-containing flame retardant effect on the oxygen-containing polymers.