Flame Retardants, Polybutylene Terephthalate (PBT)

VP-M220G Halogen Free Organic Sub-Phosphonate Flame Retardant Masterbatch

VP-M220G is a halogen free organic sub-phosphonate flame retardant masterbatch for engineering thermoplastics. It delivers effective UL94 V-0 performance at low addition levels and withstands high processing temperatures and shear conditions. With ≥17.5 percent phosphorus content, strong thermal stability, and low smoke generation, VP-M220G supports reliable flame-safe formulations in reinforced and non-reinforced nylon, polyester, and alloy systems. Its white cylindrical pellets provide clean handling, reduced dust, and consistent feeding.

Attributes

Key Features and Benefits

Halogen free formulation meets RoHS and REACH requirements for safer compounds.
High phosphorus content (≥17.5 percent) enables efficient flame retardancy at low loadings.
Thermal stability ≥350 °C supports high-temperature processing without degradation.
Maintains mechanical strength and elongation in reinforced and unreinforced systems.
Produces low smoke and non-toxic combustion for safer end-use applications.
High CTI value improves insulation performance in electrical components.
White colour and good luster help retain aesthetic quality during molding.
Cylindrical low-dust pellets reduce airborne particles and improve feeding consistency.
Long 24-month shelf life ensures stable storage under recommended conditions.

Specifications

Technical Highlights

Appearance: White cylindrical pellets (~6 mm diameter).
Phosphorus content: ≥17.5 wt percent.
Moisture content: ≤0.4 wt percent.
Thermal decomposition (1 percent loss): ≥350 °C in nitrogen.
Bulk density: 0.4–0.6 g/cm³.
Water solubility (25 °C): ≤1.6 g/L.
Halogen content: None detected.
Particle form: Cylindrical pellet.
Colour: White.
Recommended addition level: ~20 wt percent for UL94 V-0 at 1.6 mm and 0.8 mm.
Compatible polymer systems: PA6, PA66, PPA, PA46, PBT, PET, PTT, TPEE, polyester alloys (PBT/PC, PBT/PET).

Download Technical Data Sheet (TDS)

Practical industry uses

Applications

Electrical and electronics components including connectors, switches, terminal blocks, and circuit protection housings.
Automotive parts such as engine covers, under-hood components, cable brackets, and air-intake systems.
Appliance components including motor casings, housings, and flame-safe plastic parts.
Construction fittings, insulation components, and high-performance thermoplastic hardware.
Engineering compounds in PA/PBT glass-fibre reinforced systems and polyester blends.
Applicable polymers: PA6, PA66, PPA, PA46, PBT, PET, PTT, TPEE, polyester alloys.