Zinc Borate is an important additive to help achieve excellent flame resistance in rubber articles. It is a free-flowing powder that disperses easily. Zinc borate can be added to any flame retardant system and will improve flame test result with minimal effect on compound properties. Zinc borate will form a glassy char at high temperatures that prevents flame propagation. It also release water of hydration similar to ATH. Zinc borate is a synergist with Antimony trioxide and halogenated flame-retardant as well as ATH. The combined ingredients will have better-free, flame-resistant rubber that generates minimum acidic smoke.
Antimony trioxide Sb2O3
· Molecular Formula: Sb2O3
· Molecular Weight: 291.52
· CAS No.: 1309-64-4
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