1 cross-linking, grafting technology
Widely used in polymer materials, such as PE and other brominated chloride is the application of grafting technology examples. The dispersion of the treated flame retardant, the mobility and the compatibility with the substrate, and so can meet the requirements. Flame retardant R & D personnel synthesized BPS (brominated polystyrene), and its flame retardant properties, mechanical properties were studied, a good integrated flame retardant properties. The new polymer bromide flame retardant F-2016, developed by DeadSea Corporation of Israel, is a brominated epoxidizer containing about 50% bromine, a highly efficient composite flame retardant with a relative molecular mass of 1600 and its processing temperature More than 260 ℃, good thermal stability. In addition, there are commonly used silane groups on the PS graft modification, and promote the charcoal to improve the flame retardant properties. The bisreneryl group and the siloxy group or the silicon-carbon group and the like are polymerized together on the main chain of the polymer, and the crosslinking function of the diethynyl group and the Si-H bond is carried out by using hot light or electron beam to form a total Yoke flexible network structure, this structure can protect the carbon layer, to prevent further combustion.
With inorganic or organic or inorganic and organic matter on the flame retardant micro-material coating, coated flame retardant stability and compatibility with the substrate has been greatly improved, which is a fast and efficient development Of the flame retardant processing technology. In front of the inorganic coating of red phosphorus is a typical microcapsule technology applications. The same can be coated with aluminum hydroxide, foreign recently listed three surface coated ATH grades OL10141, OL1071 and 104A, the first two with aminosilane, which is coated with vinyl silane.
3 nanotechnology and nanomaterials
Many flame retardants have a very close relationship with their particle size, so that the flame retardant compounds are finely distributed to make them more evenly distributed in the flame retardant polymer, which can achieve the desired flame retardant effect. Nano-technology is widely used in polymer and inorganic nanocomposite flame retardant, to avoid the conventional flame retardant on the physical and mechanical properties of the substrate, the inorganic content is very small to achieve the desired flame retardant effect, such as polymer / Layer state silicate nanocomposites without migration, no pollution, its unique properties are conventional flame retardant additives can not be compared. Since the 1980s, Toyota's first report on the preparation of nylon-6 (PA-6) / clay nanocomposites and its application to commercial polymer / clay nanocomposites PCN has become a hotspot in research and development around the world.
4 complex flame retardant
Complex flame retardant system has a very good flame retardant synergistic smoke suppression effect, such as N-P flame retardant is now widely developed and applied composite flame retardant. Magnesium hydroxide in inorganic flame retardants also appeared in complex varieties, such as magnesium hydroxide and organic silicon compound with low smoke type, magnesium hydroxide and boric acid compound with high temperature, aluminum hydroxide coated aluminum magnesium Composite type and so have a good flame retardant synergistic effect of smoke suppression, and other common NP-Si, BP, etc., which boron composite flame retardant can effectively prevent droplet generation and smoke suppression.