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Tin Fire Retardant Group

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Tin Fire Retardant Group

Tin Fire Retardant Group

A group for individuals and companies interested in tin chemicals used as fire retardants and smoke suppressants. ITRI will collate and upload data relevant to the topic to share with members. At the same time, we hope it will be interesting for members to get to know one another to exchange data and news in the field. 

This group is led by Dr Paul Cusack

Some of our members have expressed an interest in our laboratory-scale polymer processing and fire testing facilities. For more details, either contact me directly or visit our ITRI Labs website 


Thursday, 02 February 2012 by Paul Cusack

A new on-line discussion group for all researchers and industries involved in the fire retardants field.


Hi Peter - thanks for your kind and informative comments. We are very keen to start collaborating more with fire-retardant producers, users and academics in China. I know that several university groups have published papers on zinc stannates and zinc stannate coated fillers - it would be good to find out if there is much actual use of these tin-based flame retardants / smoke suppressants in China. For information, ITRI has an office in Beijing (see details on this website). Best regards, Paul
Last replied by Paul Cusack on Tuesday, 08 January 2013
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?
Last replied by Paul Cusack on Wednesday, 25 July 2012
Regarding the two specific polymer systems you mention: SBR-latex – as this is a low temperature processing material, zinc hydroxystannate (ZHS) would be appropriate as a flame-retardant additive. However, ZHS is unlikely to be effective when used alone in SBR and would therefore be used as a synergist in conjunction with either (a) a suitable halogenated flame retardant, or (b) if a halogen-free system is required, with a suitable inorganic filler, probably alumina trihydrate (ATH). Polypropylene – although ZHS may be a possible FR additive for PP, ZHS starts to decompose at temperatures ca. 200 degrees C, so it may be preferable to use zinc stannate (ZS), which is not limited in its processing temperature. As above, ZS is unlikely to be effective on its own, so would probably be used with either a (a) halogenated flame retardant, or (b) an inorganic filler, in this case probably magnesium hydroxide as it has better thermal stability than ATH. ZHS and ZS are both commercially available from two companies in the UK - Joseph Storey and William Blythe, and also from a number of other companies globally. I can provide contact details for ZHS/ZS suppliers we are aware of as required.
Last replied by Paul Cusack on Thursday, 10 May 2012
These and other papers listed in the Information section can be ordered from the British Library: Hopefully, we will be offering a direct service through this website shortly.
Last replied by Paul Cusack on Thursday, 10 May 2012