Is antimony flame resistant?
The chemical compound antimony trioxide (Sb2O3) is widely used in plastics, rubbers, paints, and textiles, including industrial safety suits and some children’s clothing, to make them resistant to the spread of flames.
Is antimony oxide a flame retardant?
Antimony trioxide itself has no flame retardant function, however, when it is used together with halogenated compounds, the synergistic effect of the mixture creates the flame retardant properties.
What type of oxide is antimony oxide?
amphoteric oxide
Antimony(III) oxide is an amphoteric oxide. It dissolves in aqueous sodium hydroxide solution to give the meta-antimonite NaSbO2, which can be isolated as the trihydrate.
Why antimony is used as a flame retardant?
It is thought that “free radicals propagate” the flame. But, the antimony trihalides or antimony oxyhalides act as “free radical traps”, and take up free radicals. They inhibit ignition and pyrolysis in the solid, liquid, and vapor phases. A second process occurs in a solid phase and is the “char process”.
What chemicals are in flame retardant?
They are often broken into categories based on chemical structure and properties. In general, flame retardants are grouped based on whether they contain bromine, chlorine, phosphorus, nitrogen, metals, or boron. Brominated flame retardants — Contain bromine and are the most abundantly used flame retardants.
What is the flammability of antimony?
ANTIMONY is spontaneously flammable in fluorine, chlorine, and bromine. With iodine, the reaction produces heat, which can cause flame or even an explosion if the quantities are great enough [Mellor 9:379 1946-47]. Even at 10°C. bromine trifluoride reacts with antimony incandescently.
Is antimony oxide basic or acidic?
amphoteric oxides
Since antimony oxides are amphoteric oxides, they would show some interesting acid-base catalytic properties.
Is antimony trioxide halogenated?
Antimony trioxide is synergistic to halogenated flame retardants. It acts also as a smoke suppressant in various systems [150]….1.3. 10 Flame Retardants.
Flame Retardant | Remarks | Reference |
---|---|---|
Melamine cyanurate | [141] | |
Ammonium polyphosphate | [142] | |
Nanoclays | [143] | |
Antimony trioxide | Synergist |
Is SB flammable?
ANTIMONY is spontaneously flammable in fluorine, chlorine, and bromine.
How do you know if an oxide is amphoteric or basic?
A general guideline to determine if an oxide is acidic, basic, or amphoteric is to use the periodic table. Typically, metals such as Ba form basic oxides (BaO), while nonmetals such as S form acidic oxides (SO3).
How do you make antimony trioxide?
Antimony trioxide can also be made by a two step process. Stibnite is burned in air with calcium chloride to make calcium sulfate and antimony trichloride, which is reacted with water to make antimony trioxide.
What are halogenated flame retardants?
Halogenated flame retardants, particularly brominated flame retardants (BFRs), are important commercial chemicals that are added to many consumer and commercial products to inhibit them from burning when they are exposed to a spark or a smoldering cigarette.
What is the most flame resistant material?
Kevlar, Nomex, and similar synthetic materials are the most fire-resistant fabrics available today. For everyday clothing, synthetics like polyester and nylon resist burning. Natural materials like wool and silk also offer high fire resistance.