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Types of flame retardants

Types of Flame retardants
The domestic halogen system accounts for about 80% of the total flame retardant, and the foreign flame retardants are mainly inorganic system (as shown in Table 1), accounting for 50% to 60% of the total, and mainly aluminum hydroxide, magnesium hydroxide.
Table 1 Comparison of different kinds of flame retardants in China and abroad:%
Types of flame retardants in USA, Europe, Japan, China
Chlorine 8115.469
Bromine 1020218
Phosphorus series and halogenated phosphorus series 161696
Inorganic system 60506417
Halogen (fluorine, chlorine, bromine, iodine)
Halogen (F, Cl, Br, I)
Materials for risk: PCB, wires and cables, plastic parts, insulation materials, product shells, refrigerants, heat insulation materials, etc.;
Harm：
Waste combustion, will produce dioxin, benzene furan (Benzfuran), high toxicity and strong carcinogenic, affect human health; halogen containing materials in combustion or electrical fire, released a large number of corrosive harmful gases (hydrogen bromide and hydrogen chloride);
Destroy the ozone layer
Alternative: inorganic flame retardants are the main varieties of aluminum hydroxide, magnesium hydroxide, red phosphorus, antimony oxide, molybdenum oxide, ammonium molybdate, zinc borate, Zinc Oxide, zirconium oxide, zirconium hydroxide, aluminum hydroxide, magnesium hydroxide, with red phosphorus, antimony oxide is the most widely used, especially aluminium hydroxide and magnesium hydroxide can not only play a role and flame retardant. Can play a role of filling. They have the characteristics of good thermal stability, high efficiency, smoke suppression, drop resistance, filling safety, no pollution to the environment, and are widely used in halogen free flame retardant materials
Four bromo bisphenol -A (TBBP-A) /TBBP-A-BIS
Material: in printed circuit board (PCBs) is widely used, and plastic, rubber, textile, fiber and paper, but also can be used as reactive bromine flame retardants, for the preparation of brominated epoxy resin, polycarbonate and other brominated flame retardant resin, also can be used as flame retardants used in epoxy resin, ABS, HIPS, AS etc..
Harm：
Chronic contact interferes with brain and skeletal development;
When incinerated, it releases two brominated dioxins and furans causing cancer;
Harm hormone system.
The wire in the process
As soon as possible, a friend asked whether the solder wire contains halogen, halogen effect, and the content of the problem. With regard to this issue, I give the following brief replies:
The solder flux in the solder wire is usually added with a small amount of halogen containing material to ensure its solderability. Common halogen including chlorine and bromine (Cl) (Br) two, the two kinds of halogen elements, with their organic acid salt or other amine halide compounds added to the wire in the form of.
Halogen and halogen containing compounds, compounds can effectively react with copper or copper, in the welding process, can be regarded as halogen and other ingredients together the oxide flux, the welding surface removal, so as to ensure the welding quality. Thus, the main function of adding halogen is to ensure the activity of solder flux in solder wire, and significantly improve the tin effect and speed of solder wire."
Large company management and control limit
Apple:Cl<900ppm; Br<900ppm;
Cl+Br<1500ppm.
This limitation only applies to the material used in the final product, not the process chemicals
DELL:Cl<1000ppm; Br<1000ppm
Why need halogen free?"
APLLE's environmental engineer, BOB said:
Legislation is an inevitable trend
Some halogens do harm to human health and the environment
In order to get closer to the goal of "non-toxic"
Safgsrtegtr, an alternative material, has been found
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