MELAPUR® 200 decomposes endothermically above 350° C, acting as a heat sink to cool the polymer. The released phosphoric acid forms a coating which shields the polymer substrate. The phosphoric acid further reacts with the polymer to form a char and inhibit the release of free radical gasses into the oxygen phase. Simultaneously, nitrogen species released from the degradation of melamine intumesces the char to further protect the polymer. MELAPUR® 200 was originally developed to suit the high processing temperatures associated with compounding glass fiber reinforced polyamides. But MELAPUR® 200 also evolved into other applications, either replacing existing flame retardant systems like APP or permitting development of new formulations.

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