Flame retardant performance aluminium hydroxide

Table 6.2 A comparison of the flame retardant performance of aluminium hydroxide (ATH) and MCS [125 phr in crosslinked EVA] ...

The performance of aluminium hydroxide/magnesium hydroxide-filled systems can be enhanced by incorporation of zinc hydroxystannate in halogen-free rubbers giving reduced smoke and toxic gas emission, coupled with higher flame retardancy. This action will be complimentary to the water release and endothermic effects of aluminium hydroxide/magnesium hydroxide filler systems. 

Consideration is given to the influence of combinations of zinc hydroxystannate (ZHS) with hydrated fillers, on the fire properties of plasticised PVC and polychloroprene. It is shown that magnesium and aluminium hydroxides specially coated with ZHS, confer significantly increased combustion resistance and lower levels of smoke evolution to these polymers. This permits large reductions to additive loading relative to unmodified filler, without sacrificing flame retardant or smoke suppressant performance. 10 refs. 

Specially coated magnesium and aluminium hydroxides confer significantly increased combustion resistance and lower levels of smoke evolution, permitting large reductions in additive loading, without sacrificing flame retardant or smoke suppressant performance. 

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