Halogenated flame retardants refer to halogenated polymers or flame retardants combined with halogenated flame retardants, mainly antimony trioxide and decabromodiphenyl ether, also known as antimony bromide flame retardants, bromonium bromide flame retardants have excellent flame retardant properties, used to be widely used as a lene-blocking material. However, in the event of a fire, such materials made with halogenated flame retardants will produce a large amount of smoke and toxic corrosive hydrogen halide gas when heated, causing secondary damage. In February 2003, the eu issued two directives WEEE and RoHs. WEEE is the directive on recycling waste electrical and electronic equipment, and RoHs is the directive on restricting and prohibiting the use of certain toxic and harmful substances and elements in electrical and electronic equipment. In August 2004 the two directives were translated into law in the 15 member states of the European Union. In Western Europe, new flame retardant classification methods and testing standards have been implemented in wire and cable, building materials and coating industries. China also began to apply for approval of building materials and products of the combustion performance of the national standards. The flame retardancy rating and national standards in China have many of the same characteristics as the new standards in Western Europe, that is, the flame retardancy is evaluated by emphasizing the fire development rate, the rate of heat release, the smoke generation and the corrosiveness and toxicity of the combustion products. In order to pass this new standard, traditional halogen-based flame retardants such as antimony trioxide will be powerless.

New flame retardant system, when burning smoke volume is small, do not produce corrosive, toxic gas. Halogen-free flame retardants are mainly phosphoric compounds and metal hydroxides.

Halogen-free flame retardant jlh-w666 is a high-performance organic flame retardant of phosphorus and nitrogen, which is a triazine triketone compound and triazine triamine compound. It has undergone special surface treatment, so it is easy to disperse in plastic materials without precipitation.it has a good flame retardant effect. W666 decomposition temperature about 450 ℃, the maximum particle size distribution (D50 %) of 20 / um, appearance is white powder, is a kind of color does not affect the product's resistance to high temperature of high-performance halogen-free flame retardants recommended for polyamide (nylon) are widely used in epoxy resin, polyurethane, polystyrene, polyester (PET, PBT), polyolefin and halogen-free, wire and cable suggested adding 15% 30% of halogen free flame retardant W666, would be able to reach the where V0-94 ul standard of V2.