Melamine Cyanurate (MCA)
CAS Number: 37640-57-6
Featured inFlame Retardants
Melamine cyanurate (MCA) is a halogen-free, nitrogen-based flame retardant specifically optimized for unreinforced polyamide (nylon) systems, where it achieves UL94 V-0 classification at 8–15% loading. The compound functions by releasing inert gases (NH3, CO2) that dilute the combustion atmosphere and by promoting melt dripping that carries burning material away from ignition sources. MCA offers excellent compatibility with PA6 and PA66 without significant degradation of mechanical properties.
Technical Specifications
| appearance | White powder |
| moisture content (%) | <0.3 |
| nitrogen content (%) | 49–50 |
| bulk density (g/cm³) | 0.3–0.5 |
| particle size D50 (µm) | 3–10 |
| melting/decomposition temperature (°C) | >320 |
Applications
- Unreinforced PA6 and PA66 molding compounds (UL94 V-0 at ≤15%)
- Polyamide-based engineering plastic connectors and enclosures
- Nylon film and fiber applications requiring textile FR compliance
- Adhesive and hot-melt systems based on polyamide chemistry
- Blends with aluminum diethylphosphinate (AlDEP) for glass-filled PA systems
Key Features
- Achieves UL94 V-0 in unreinforced PA6/PA66 at only 8–15% loading with minimal density impact
- Halogen-free and phosphorus-free — pure nitrogen mechanism suitable for food-contact adjacent applications
- Excellent thermal stability (>320 °C) allows processing at standard PA extrusion temperatures
- Fine particle size and surface treatment options available for improved dispersion and surface quality
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CAS Number
37640-57-6
Category
Fire Retardant ChemicalsAvailability
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