Melamine Polyphosphate (MPP) is a high-efficiency, halogen-free flame retardant widely used in engineering plastics and high-temperature processing materials. It leverages an intumescent mechanism that combines acid source, gas source, and carbonization actions to suppress combustion effectively.

Key FeaturesHalogen-Free & Eco-Friendly

MPP contains no bromine or chlorine, avoiding toxic dioxin/furan formation during combustion. It aligns with global regulations (e.g., REACH, RoHS) and offers a safer environmental profile.

Dual-Action Flame Retardancy

Acid Source (Polyphosphate Component): Upon heating, the polyphosphate decomposes to form polyphosphoric acid, which catalyzes dehydration and charring of the polymer matrix, creating a preliminary carbon layer.

Gas Source (Melamine Component): The melamine moiety decomposes at high temperatures (>300°C), releasing non-flammable gases (e.g., nitrogen, ammonia). These gases dilute oxygen and flammable volatiles in the combustion zone.

Synergistic Intumescent Effect

The released gases cause the initial char layer to expand into a porous, insulating "carbon foam". This barrier blocks heat transfer, oxygen diffusion, and the release of combustible gases, effectively quenching the fire.

CAS NO:20208-95-1

EC NO:243-601-5

Molecular Formula:C₃H₆N₆O₄P

Molecular Weight:221.0929

Synonyms:;MP;Melamine Polyphosphate;1,3,5-Triazine-2,4,6-triamine polyphosphate;1,3,5-triazine-2,4,6-triamine phosphate (1:1);1,3,5-triazine-2,4,6-triamine phosphate;

Molecular Structure: