Posted on 31/07/2017 in News 32 2017
P – N inorganic clay flame retardant for polyethylene

A novel flame retardant compound combining phosphorus, nitrogen (melamine) and inorganic clay (montmorillonite, a nautral clay) was experimentally produced in a three-stage reaction by progressively reacting the readily available PIN components phosphoruic acid – pentaerythritol (a widely used “blowing agent” for intumescent systems) – montmorillonite and melamine.

The resulting MPPM was tested as a flame retardant in linear low density polyethylene (LLDPE), a widely used, low cost polymer which poses issues of high flammability and burn dripping. Loadings of 25 – 35% MPPM in the polyethylene reduced peak heat release rate (PHRR) by 50 – 75%, and 35% MPPM enabled to achieve UL94-V0 with no burning dripping.


“A Novel Intumescent Flame Retardant: Synthesis and Its Application for Linear Low-Density Polyethylene”, G. Makhlouf, Arab J Sci Eng 2017 
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