Melamine Polyphosphate (MPP)

Name: Melamine Polyphosphate (MPP)
Brand: Chemzip
Price: 1 USD
Availability: InStock

CAS Number: 218768-84-4

Melamine polyphosphate (MPP) is a halogen-free, nitrogen–phosphorus synergistic flame retardant offering excellent thermal stability up to 320 °C, making it particularly suitable for high-processing-temperature engineering plastics. It functions by releasing non-combustible gases and promoting char formation simultaneously, providing both gas-phase and condensed-phase fire suppression. MPP is a preferred alternative to older melamine derivatives in glass-fiber-reinforced PA6 and PA66 systems.

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Technical Specifications

appearance	White powder
moisture content (%)	<0.3
nitrogen content (%)	41–43
phosphorus content (%)	13–14
particle size D50 (µm)	5–15
thermal decomposition onset (°C)	>320

Applications

Glass-fiber-reinforced polyamide PA6 and PA66 (UL94 V-0 at 25–30% loading)
Thermoplastic polyurethane (TPU) and polyester (PBT/PET) compounds
Epoxy resin laminates and printed circuit board prepregs
Polyolefin cable and wire compounds requiring halogen-free FR certification
Intumescent coatings as acid and gas source synergist with APP

Key Features

High thermal stability (>320 °C) compatible with engineering plastics processing temperatures
Synergistic N–P mechanism delivers both gas-phase dilution and condensed-phase char barrier
Halogen-free and low-smoke, compliant with IEC 60332, EN 45545, and UL94 V-0 standards
Low moisture absorption prevents processing issues and maintains long-term electrical properties