Appearance: white powder
Drying loss (﹪):≤0.2
Average particle size (nm): 20±5
Aluminum hydroxide (ATH) and magnesium hydroxide (MDH) are the largest and most widely used inorganic flame retardant additives; as a synergist of halogen-based inorganic flame retardants, trioxide is widely used; in addition to antimony oxide, It is worth mentioning that zinc borate can partially replace antimony oxide in many applications, and its price is lower than antimony oxide; other available boride flame retardants include ammonium fluoroborate, boric acid and borax, and boron-based resistance Burning agent is one of the earliest ptfe boat wax used flame retardants, and it is also a large series of inorganic positive burning agents; phosphorus and phosphorus-containing compounds are the most important category of inorganic flame retardants, such as urea, guanidine, dicyandiamide, and dicyandiamide. Ammonium hydrogen and diammonium phosphate and short-chain ammonium polyphosphate, etc.
There are many types of organic flame retardants. In practical applications, they can be divided into two categories: organic phosphorus flame retardants and organic halogen flame retardants. Brominated flame retardants are an important series of halogen-containing flame retardants; commonly used The added organic chlorine-containing flame retardants are polychloroprene, PVC, chlorinated polyvinyl chloride, chlorosulfonated polyethylene, chlorinated paraffin, tris(chloroethyl) phosphate, tris(dichloropropyl) phosphate ) Esters, tris(chloropropyl) phosphate, methyl pentachlorostearate, cyclic aliphatic hydrocarbons, chlorine-containing flame retardants, and chlorinated anhydrides. Among them, chlorinated paraffin is the most commonly used because it is cheap and easy Therefore, solids with a chlorine content of 70% are generally used, and liquids with a chlorine content of less than 50% can also be used. When only using halide flame retardants, the effect is not good. Therefore, in practical applications, it is generally compared with metal oxides (especially Sb gOg), namely
And phosphide. The relative activity of different halides is proportional to their atomic weight
When they are used as flame retardants, the effectiveness of their flame retardancy increases with their activity. The order of activity is:
I>Br>CD>F At the same time, the same halide has different activity and effectiveness depending on the structure. The order of activity of aliphatic halides, cyclic hydrocarbons and aromatic halides is generally:
Aliphatic halides>Cyclic hydrocarbons>Aromatic halides
Ionic bromine-containing additives include ammonium bromide and phosphorus bromide, which are generally used in conjunction with other synergistic flame retardants.
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