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Will zinc stannate work in halogen-free?

Discussion started by Jeremy Pearce , on 24 May 02:15 PM

ATH and MgOH2 require quite high loadings and have a negative impact on mechanical properties ( strength, abrasion .. ).

This product seems to function more as synergist (similar as Antimony trioxide ) and not as flame retardant as such. Will it also work in non-halogen phosphorous/nitrogen systems ?

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ATH and MgOH2 require quite high loadings which I wanted to avoid because they have negative impact on mechanical properties ( strength, abrasion .. ).

This product seems to function more as synergist (similar as Antimony trioxide ) and not as flame retardant as such. Will it also work in non-halogen phosphorous/nitrogen systems ?

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Paul Cusack
Dick - thanks for your comments re. ZS + phosphate FR systems. We certainly expect to see ZHS/ZS usage growing in halogen-free polymer formulations. By the way, is your paper published in Polymer Degradation & Stability yet or is it still in press?
1770 days ago
 
Richard Horrocks
We have evidence that zinc stannate can work synergistically in PA6 with certain flame retardants eg certain aryl phosphates plus melamine polyphosphate. See my paper "Zinc stannate interactions with flame retardants in polyamides: Part 2 - potential synergies with non-halogen-containing flame retardants in polyamide 6 (PA6)" highlighted on the users page.
1770 days ago
 
Paul Cusack
ZHS and ZS were initially developed as synergists for PVC and other halogen-containing polymers, having clear benefits over antimony trioxide particularly with regard to low toxicity and smoke suppression. More recently, they have found increasing usage in halogen-free polymer formulations, where they tend to be used as synergists with other FR types, particularly hydrated fillers (ATH and MGH) but also with some phosphorus / nitrogen FRs. In the case of inorganic fillers, the use of ZHS and / or ZS can often allow significant reductions in overall filler loading to be achieved with no compromise in FR properties and with the additional benefits of easier processing, and improved physical / mechanical properties.
1831 days ago