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09/Oct/2019
Foam Expo Europe and Composite Europe 2019 in Stuttgart
Last year, the two trade fairs COMPOSITES EUROPE a
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14/Aug/2019
Pinfa Workshop “Electromobility & Fire Safety Challenges” in Tokyo, Japan
On July 1, 2019, the hotel "The Westin"
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29/May/2019
Electrified future
Also in 2019, renowned companies such as Henkel, S
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23/May/2019
Design for Fire Safety in Greener Electronics
pinfa North America held its sixth industry da
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08/May/2019
Cultural heritage in flames
The pictures of the fire of the Parisian church No
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01/Apr/2019
The long and thorny way to greener electronics - chemicals management for the electronics industry remains a challenge
On 2019-03-28, ChemicalWatch organized a conferenc
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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.