Flame Retardants

FRP-603H Red Phosphorus Flame Retardant Masterbatch

FRP-603H is a high-concentration, halogen-free red phosphorus flame retardant masterbatch developed for engineering plastics. It is optimised for dark-coloured and glass-fibre-reinforced PA6, PA66, PBT and PET compounds. The product is produced by melt-blending and pelletising using advanced encapsulation technology, delivering excellent thermal stability, very low phosphine emission and strong mechanical performance. At only 8–9 percent loading, FRP-603H provides UL94 V-0 at 2.0 mm while maintaining tensile and impact properties in reinforced polyamide systems.

Attributes

Key Features and Benefits

• UL94 V-0 at 2.0 mm achieved with only 8–9 percent addition.
• Decomposition temperature ≥360 °C supports safe nylon and polyester processing.
• Low phosphine emission due to advanced red phosphorus encapsulation.
• Non-dusting pellets improve handling, dosing and workplace safety.
• Excellent dispersion ensures uniform flame-retardant performance.
• Maintains impact, flexural and tensile strength in reinforced PA systems.
• Halogen-free formulation compliant with RoHS, REACH and SGS.
• Stable performance in dark or black polymer systems with minimal blooming.

Specifications

Technical Highlights

• Appearance: Black pellets
• Red phosphorus content: ≥80 percent
• Carrier system: Nylon-based polymer compatibilizer
• Decomposition temperature: ≥360 °C
• Moisture content: ≤0.5 percent (ASTM D570)
• Kindle temperature: ≥360 °C
• Recommended addition: 8–9 wt percent (UL94 V-0 at 2 mm)
• Compatible polymers: PA6, PA66, PBT, PET

Download Technical Data Sheet (TDS)

Practical industry uses

Applications

Target Industries
• Electrical and electronics: connectors, terminal blocks, switchgear, cable management components
• Automotive: engine compartment parts, electrical housings, under-hood connectors
• Consumer appliances: sockets, power tools, insulation components
• Industrial equipment: housings, cable clips, safety-critical components
• Compounding & masterbatch production: PA and PBT halogen-free V-0 formulations

Compatible Polymer Systems
• PA6
• PA66
• PBT
• PET
• Glass-fibre or mineral-reinforced engineering plastics
• Dark or black polymer compounds requiring low blooming