It is understood that antimony trioxide is a white crystalline powder with a melting point of 655°C and a boiling point of 1550°C. It is soluble in concentrated hydrochloric acid, sulfuric acid, alkali solution and hot tartaric acid. Solution, slightly soluble in water, dilute nitric acid and dilute sulfuric acid, mainly used as pigment, flame retardant, mordant, catalyst, and can also be used to synthesize antimony salts.
The specific uses of antimony trioxide are as follows:
Antimony trioxide is a widely used additive flame retardant, suitable for polyethylene, polyethylene General flame retardant for acrylic, polystyrene, polyvinyl chloride, polyester, epoxy resin, polyurethane and other plastics. When used alone, the flame retardant effect is low. When used together with phosphate esters, chlorine-containing compounds (such as chlorinated paraffins, polychlorinated biphenyls, perchlorcyclodecane, etc.), and bromine-containing compounds (such as hexabromobiphenyl, hexabromobenzene) , has a good synergistic effect, and the flame retardant efficiency is significantly improved. When antimony trioxide is used together with chloride or bromide, antimony chloride or antimony bromide is generated. They are reactive and volatile substances. In the solid state, they can promote the movement of halogens and the formation of carbides. In the gaseous state, they can Capturing free radicals, these reactions contribute to flame retardancy. Often, zinc oxide, sodium hydroxide, etc. are used as synergists of brominated flame retardants in plastic fire protection systems.
Used as white pigment, white glass, enamel, medicine, cement, filler, mordant and fire retardant coating, etc.
Excellent inorganic white pigment, mainly used for coloring paints.
Used as a flame retardant for various resins, synthetic rubber, canvas, paper, coatings, etc., and as a catalyst for petrochemicals and synthetic fibers.
Used in the manufacture of mordants and opalescent agents, and is the raw material for the synthesis of antimony salts.
Enamel industry is used to increase the opacity and surface gloss of enamel.
In the glass industry, it is used as a decolorizing agent instead of arsenic acid.
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