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Halogen-free phosphorus-based flame retardant offering excellent fire safety performance.
Good thermal stability suitable for processing temperatures up to 280 °C.
Low volatility and minimal plate-out during extrusion and injection molding.
Compatible with polyamide 6 (PA6) and polyamide 66 (PA66) engineering plastics.
Supports UL 94 V-0 rating at appropriate loading levels in reinforced PA systems.
Electrical and electronic components requiring high flame resistance and tracking resistance.
Automotive under-hood parts such as connectors, sensor housings, and fuse boxes.
Consumer appliance housings including power tools, kitchen appliances, and charging stations.
Industrial automation enclosures and control panel components.
3C product structural parts where RoHS compliance and low smoke generation are critical.
| Chemical Type | Organophosphorus compound (melamine phosphate derivative) |
| Product Form | White to off-white free-flowing granules |
| Appearance | Granular, homogeneous particles |
| Density (23 °C) | 1.7–1.8 g/cm³ |
| Melting Range | 280–320 °C (decomposition onset) |
| Moisture Content (max.) | 0.3 wt.% |
| Primary Applications | Flame retardancy in polyamide 6 and 66 compounds |
| Key Features | Halogen-free, REACH-compliant, UL-listed component |
Q1: What is the primary mode of action for Melapur MC 25 in polymer systems?
A: Melapur MC 25 functions primarily as a condensed-phase flame retardant, promoting char formation and enhancing thermal stability during combustion. It does not rely on halogenated chemistry and is designed to reduce heat release and suppress melt dripping in thermoplastics.
Q2: Which polymer matrices is Melapur MC 25 typically compatible with?
A: Melapur MC 25 is especially suited for engineering thermoplastics such as polyamide 6 and polyamide 66, where it delivers balanced flame retardancy and mechanical property retention. It may also be evaluated in certain polyesters and polyolefin blends, though compatibility and performance must be verified case by case through formulation testing.
Q3: How is Melapur MC 25 typically incorporated into polymer formulations?
A: It is generally introduced via conventional compounding methods—such as twin-screw extrusion—either as a masterbatch or direct addition. Thermal stability allows processing at typical PA6/PA66 melt temperatures without significant decomposition, provided residence time and shear conditions are optimized.
Q4: Does Melapur MC 25 affect the color or surface appearance of finished parts?
A: Melapur MC 25 is supplied as a white to off-white powder and generally supports good colorability in light- and medium-toned applications. In highly demanding aesthetic applications—especially ultra-light or transparent grades—preliminary trials are recommended to assess potential haze or subtle undertones.
Q5: Is Melapur MC 25 suitable for applications requiring regulatory compliance for food contact or electronics?
A: Melapur MC 25 is not specifically developed or certified for food-contact applications. For electronics, its non-halogenated nature and low smoke generation make it a candidate for certain housing or structural components, but final suitability depends on full system validation against relevant industry standards.
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