Tetrabromophthalic anhydride (TBPA) is produced by bromination of phthalic anhydride. In this compound, hydrogen atoms in the benzene ring of the anhydride are replaced by bromine atoms. Tetrabromophthalic anhydride is the most brominated and has four bromine atoms in its chemical structure, which makes it likely to exhibit stronger electronegativity and more stable chemical properties in chemical reactions. Because tetrabromophthalic anhydride has a high bromine content, it is often only necessary to add a small amount to achieve a better flame retardant effect, and it has high unsaturation, both high crosslinking density, good light and thermal stability and excellent heat resistance, but also has mechanical properties, electrical insulation properties. In addition, the product has low toxicity and does not pollute the environment. TBPA can be used as an ideal reactive flame retardant or as an additive flame retardant.
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