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07/Oct/2021
“European Meeting on Fire Retardant Polymeric Materials" in Budapest - FRPM21 – real people meeting again live to discuss science
The European Meeting on Fire Retardant Polymeric M
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17/Aug/2021
Webinar “Resistance to fire, heat and their contaminants” increases awareness for flame retardant solutions for transportation
During this year's webinar by Octima, solution
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17/May/2021
“Fire Resistance in Plastics" addresses circular economy
As in the last year, events such as fairs or meeti
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08/Apr/2021
Updated comprehensive overview about flame retardants available
The article about flame retardants in ULLMANN'
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07/Dec/2020
During "European Fire Safety Week" Pinfa informs about fire safety for e-mobility
As in previous months, conferences and information
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13/Nov/2020
RoHS and potential additional flame-retardant bans in Europe
  In the past, the growing amount of elect
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Inorganic

Mode of action: Depending on the flame retardant, cooling of the polymer, dilution of the substrate and of the combustion gases (ATH, MDH), or formation of a charred layer (Zn borate, exp.C, Nanocomposites), as well as synergism (ATO, AlOOH) may take pla

The most important flame retardants, which are also used as fillers, are aluminum trihydrate (ATH) and magnesium hydroxide (MDH). In addition, antimony trioxide (ATO) is used in large quantities as a synergist with halogenated flame retardants and PVC. Aluminum oxide hydrate (AlOOH or Boehmite) also acts as a synergist in conjunction with metal phosphinates.


Metal hydroxides


Aluminum hydroxide or aluminum trihydrate (ATH) already decomposes at around 200 °C.


Therefore, it only can be used with plastics processed at lower temperatures such as PVC, polyethylene, ethylene/vinyl acetate-copolymers and thermosets.


Aluminum oxide hydrate (AlooH) or Boehmite decomposes at 320 °C. It can therefore be used in engineering thermoplastics and is synergistic with metal phosphinates. It iss also used in printed circuit boards.



Magnesium hydroxide (MDH) decomposes at around 300 °C.


Its main applications are polypropylene, polyamides and wire & cable.


Zinc compounds


Zinc borate may partly substitute antimony trioxide in thermoplastics, inhibits afterglow and acts as a smoke suppressant. 4ZnO . B2O3 .H2O, which decomposes at 415 °C, is suitable for engineering plastics.


Zinc hydroxystannate is used as a smoke suppressant for PVC, unsaturated polyesters and elastomers.