Posted on 30/10/2019 in 2019
Melamine – bio-sourced phytate FR for polypropylene

Melamine and phytic acid (a molecule naturally found in plants) were reacted in aqueous solutions. The six phosphates in phytic acid reacted with six melamines, and two-dimensional nanoflakes were formed in drying (MEL-PA). This product was then tested at 1 – 3 % loadings in polypropylene (PP). Dispersion is shown to be good. 2% MEL-PA reduced peak heat release from 756 to 608 kW/m2 and also significantly reduced smoke release rate. The flame retardancy effect is considered to result from a physical barrier role of the D2-nanoflakes, char generation (phosphorus) and dilution of oxygen (release of water and ammonia).

“Facile preparation of layered melamine-phytate flame retardant via supramolecular self-assembly technology”, S. Shang et al., Journal of Colloid and Interface Science 2019

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