Journal
POLYMER DEGRADATION AND STABILITY
Volume 79, Issue 2, Pages 309-318Publisher
ELSEVIER SCI LTD
DOI: 10.1016/S0141-3910(02)00294-X
Keywords
EVA co-polymer; zinc hydroxystannate; alumina trihydrate; magnesium hydroxide; halogen-free formulations; coated fillers; nanoclays; flame retardancy; smoke suppression
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Zinc hydroxystannate (ZHS) is found to be an effective partial replacement for the conventional hydrated fire-retardant fillers alumina trihydrate (ATH) and magnesium hydroxide (MH) when incorporated into a halogen-free EVA cable compound. In contrast to earlier findings for halogen-containing polymers, ZHS-coated versions of the fillers are somewhat less effective than equivalent composition mixtures of ZHS + filler. Incorporation of ZHS also greatly enhances the performance of an ATH/nanoclay synergistic fire-retardant system in the EVA formulation and allows marked reductions to be made in overall filler level with no or little compromise in terms of flame-retardant and smoke-suppressant properties. (C) 2002 Elsevier Science Ltd. All rights reserved.
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