People's requirements for fire safety and flame retardant products are becoming higher and higher, with the increasing awareness of global safety and environmental protection. Halogen-free, low-smoke, low-toxic environmentally friendly flame retardants and bromine-based environmentally friendly flame retardants have become people's pursuit of goals.

1.Decabromodiphenylethane 8010

It is absolutely impossible to produce PBDD or PBDF8010 during combustion. The relative molecular weight is 971. The bromine content is 82% and the DBDPO bromine content is equivalent (83%, so the flame retardancy is basically the same; the initial melting point is 345 ° C, 8010 is not a polybrominated diphenyl ether. Thermal stability Higher than DBDPO305 ℃); light resistance and difficult to dialysis are better than DBDPO's most valuable flame retardant plastic can be recycled, which is a feature that many brominated flame retardants do not have. The 8010 industrial product is a free-flowing, micro-granulated red crystalline powder with an average particle size of 3 μm. It is easy to disperse in plastic modification and the color of plastic products is free. And industrialized interest is comparable to DBDPO, and DBDPO is the most ideal substitute. As an additive brominated flame retardant, the use of 8010 also requires the use of antimony compounds in the same proportion as DBDPO / antimony compound. Compared with DBDPO, 8010 is more suitable for high temperature and high viscosity engineering plastics. First, the United States Yabao Company, which industrially produced 8010, and applied for production and use patents; this caused domestic flame retardant research and production units to delay conducting research in this area, but after inquiry, it was found that the scope of Yabao's patents It is a region outside China, so 8010 can be produced and used in China, but it cannot be imported and patented. Liu Yanhuaming, domestic research and production units have invested in research, and at the end of 2002 victory in industrial scale trials. At present, the representatives of domestic market manufacturers include: Yabao Company, Dahu Company, Suzhou Jinghua Industry Co., Ltd., Shandong Laiyu Chemical, etc.

2.Brominated epoxy resin

The bromine content can reach 50% and the molecular weight is between 1000 and 45,000. The brominated epoxy resin for flame retardants is also known as tetrabromobisphenol A epoxy oligomer. It is divided into EP type and EC type. Compared with EP type, EP type has better light resistance but lower bromine content, while the latter flame retardant ABS and HIPS have better impact strength. Commercial brominated epoxy resin is a mixture of milky yellow semi-transparent wafer and white powder. Domestic brominated epoxy resin has a soothing odor, while Israel's Dead Sea bromine product has no odor. Brominated epoxy resin has satisfactory melt flow rate and high flame retardancy efficiency, excellent thermal stability and light stability, and can impart good mechanical properties to flame retardant substrates, and the product does not frost.

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The production process is perfect. Low phase molecular weight brominated epoxy resin is suitable for flame retardant ABS and HIPS high phase molecular weight. It is suitable for engineering plastics such as flame retardant ABS / PC alloy and PCPETPBT. The use process needs to be used in conjunction with antimonide. The Israeli Dead Sea Bromine Company is the world's most famous manufacturer of brominated epoxy resin flame retardants. The product quality is excellent; it was once the only brand in the domestic brominated epoxy resin flame retardant market. Since 2002, Shandong Laiyu Chemical has successively commercialized brominated epoxy resins, but the product quality is not satisfactory. At present, the representative products in the domestic market are: Israel Dead Sea Bromine Company F2100F2400 Shandong Laiyu Chemical, Taiwan Changchun BEB series and so on.

3.Brominated polystyrene

It is also a flame retardant variety that has developed rapidly in recent years. Brominated polystyrene is red or light yellow powder or granules. The development of brominated polystyrene is similar to that of brominated epoxy resins. The bromine content is around 60%. The thermal decomposition temperature is greater than 310 ° C. It has the advantages of large molecular weight, good thermal stability, good dispersibility and compatibility in polymers, easy processing, and no frost. Brominated polystyrene is named brominated polystyrene and polybrominated styrene according to its synthetic route. From the name, it can be seen that brominated polystyrene is a polybrominated polybrominated polybrominated polybrominated polybrominated polystyrene. Styrene is firstly protected by olefinic bonds, then brominated, and then recovered to recover the olefinic bonds to synthesize brominated styrene. Polymerization is completed again. Whether the solvent is used in the synthesis process can be divided into solvent method and non-solvent method. Solvent method. Because the solvent method consumes less bromine, it is usually synthesized by the solvent method. Brominated polystyrene is mainly used in thermoplastic resins such as PA PBTPET. The use process needs to be used in conjunction with antimony compounds. When flame retardant polyester, the addition amount is 13% reinforced) 17% non-reinforced) can be assigned to the material UL94V-O grade (0.8mm flame retardant polyamide, the addition amount can be assigned to the material UL94V-O grade at 21% (0.8mm American Great Lakes and Albemarle are well-known brominated polystyrene manufacturers. Their products were far ahead in the domestic market. Now some domestic flame retardant manufacturers have produced domestically, such as Shouguang Ocean Chemical Co., Ltd. Wait.