Aspects of plastic flame retardant technology

Plastic applications continue to expand at the same time increasing its heat and combustible and easily ignite , brought to mankind unexpected danger and loss.
Began to pay attention and emphasizes natural and synthetic materials, flame resistance , flame retardant additives began as an important class of first chemical fiber, plastics industry rise .
Flame began to develop rapidly , consumption and varieties rose sharply , there are around 6 to 8 percent growth rate. Many of the additives in the plastics industry in flame retardant consumption has moved up to No. 2 , second only to the great variety of  iron oxide yellow plasticizers . . Flame retardant additive and reaction is usually divided into types: additive flame retardant used for thermoplastics , is currently the world 's largest production of flame retardants, flame retardants accounted for 90% of total . More reactive flame retardant for thermosetting plastics ; flame retardants according to the chemical structure can be divided into inorganic and organic flame retardants , inorganic flame retardants are antimony compounds , inorganic boron compounds, inorganic phosphorus flame retardant , inorganic hydroxides , organic flame retardants include organic halogenated flame retardants and organic phosphorus flame retardant. Antimony flame retardants. Antimony prices high , heavy smoke , while halogen flame retardant antimony trioxide is essential gn3t}? ^. Bm synergists , so trioxide particle fineness requirement is getting smaller, not only greatly reduce the amount of increase flame jf? v [{! K | , but also smoke are greatly reduced . Are generally in the fineness of several microns to 0.01μm, as developed by Seiko Co., Ltd. of Japan Patox average particle size of 0 .01 ~ 0 .02 μm. Guizhou Rong Jiang Fenghua developed chemical antimony antimony oxide ultrafine pure activity , with an average particle size of 0.02μm, content of 99.999% . PolycomHuntsman developed "N% vVu` P NyacoIADP480 a particle size less than 0.1μm antimony pentoxide , adding 1% in the PP up a good flame retardant , and not ?)? L? AVQIp
Be of PP impact strength, transparency, etc. impact. Another use of antimony trioxide and aluminum hydroxide , zinc borate , fluoride {C?? O @?? WS borate complex , not only can reduce the amount of antimony trioxide and the amount of smoke is also greatly reduced. In short ultrafine seek ) E??. OaP antimony substitutes and reduce the amount of smoke is antimony flame retardants development focus . ? G?} 7?? 50 TW2? 4? ~? / - Brominated flame retardants . Brominated flame retardants despite heavy smoke , because of environmental issues by the EU restrictions ; but chromium oxide  because flame -g?? NpH? YB good performance , with less impact on product performance is small, quite a long time in the future is still as the main flame . With ? ~ PpN? DLFL
Brominated flame retardants is to continue to develop new features to improve and increase the molecular weight of bromine content . Such as the U.S. Ferro 's PB-68 is mainly composed of brominated polystyrene, the molecular weight 15000 containing 68% bromine . Belfast bromine chemical companies and Ameribrom companies were developed poly Pentabromophenol acrylate bromine content of 70.5% \ MW 30000 ~}-n? DdMa / - 80000. These flame retardants particularly suitable for all kinds of engineering plastics, migration , compatibility , thermal stability, flame resistance , etc. are much better than many small molecules flame retardants , may become future replacements. - Phosphorus flame retardant . Phosphorus flame retardants are white blowing agent  mostly liquid, mainly used in PU, PVC and other plastics . United retardant properties of polymers is much better than the linear polymer , so thermoplastics plus $? _ZQ]?? F add a small amount of crosslinking agent work becomes part of the polymer network structure, not only to improve the dispersibility of the flame retardant , there are benefits BqOve? s2xU the polymer produced when burning coking in the condensed phase , effectively improve the flame retardant properties and to increase the product 's physical and mechanical properties ? O-YGEjeG? energy , resistance, thermal properties, etc., as in adding a small amount of soft PVC quaternary it to heat to form a crosslinked flame retardant material > a ~: z?-Jiz material . Radiation may also be used to join metal oxides and crosslinking methods, but also allows the polymer to pay . W #?? VTZE; d zk???? 0B {- directly generate retardant monomer technology . Directly before the polymerization of the monomer having a flame resistance, so that the resulting 1? Wo? FI?; Polymer a flame retardant material, but also a method of flame .