Flame retardants and halogen sources act on both flame and smoke in a variety of important polymer systems. Health, safety and the environment are important factors in today’s world, and zinc stannate products have no negative impact in these areas. Zinc stannate is an anhydrous product with excellent thermal stability even at 400 degrees and is recommended for use in polyamide systems. The molecular structure of zinc stannate contains tin and zinc; Both elements have special functions that allow zinc stannate to act in two mechanisms or in two phases. For example, tin is released into the gas phase at the beginning of combustion, where it combines with halogen free radicals released by the breakdown of halogen flame retardants to form a flame. Zinc acts in the condensed phase, catalyzing the decomposed polymer to form carbon rather than smoke. The reaction of zinc stannate in the gas phase is similar to that of antimony trioxide, especially when non-hazardous materials must be used. Flamtard S recommends the use of zinc stannate as a flame retardant coactive in polyamide. Designers of modified polymers can confidently use zinc stannate in high-performance applications that need to meet stringent standards for flame retardancy and smoke suppression. Zinc stannate products have no negative effects on health or the environment and have great potential for applications that need to meet regulatory mandates. Zinc stunate flame retardants are highly effective at low dosages in the presence of halogen sources, such as bromine-containing polymer flame retardants. Zinc stannate products are compatible with many polymer systems and have no negative effect on mechanical properties.
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