Flame Retardants

PAADP-20 Organic Phosphonate Halogen Free Flame Retardant Masterbatch

PAADP-20 is a halogen free organic phosphonate flame retardant masterbatch designed for high-temperature engineering plastics. It provides ≥17.5 percent phosphorus, strong char-forming efficiency, and excellent thermal stability with decomposition above 350 °C. Its formulation delivers low smoke, high CTI performance, and minimal impact on mechanical strength. PAADP-20 supports UL94 V-0 ratings at low addition levels in PA, PBT, PET, polyester alloys, and glass-fiber-reinforced systems.

Attributes

Key Features and Benefits

High phosphorus content (≥17.5 percent) provides strong char-forming flame retardancy.
Thermal stability ≥350 °C supports high-shear, high-temperature polymer processing.
Halogen-free chemistry produces low smoke and low toxicity emissions.
High CTI performance enables use in demanding electrical and electronic components.
Typical 20 percent dosage achieves UL94 V-0 ratings in multiple engineering polymers.
Masterbatch form ensures clean handling, low dust, and consistent dosing.
Retains tensile and impact properties with good colour stability.
Compatible with a broad range of engineering plastics and polyester-based systems.

Specifications

Technical Highlights

Appearance: White cylindrical pellets (~6 mm).
Phosphorus content: ≥17.5 percent.
Moisture content: ≤0.4 percent.
Water solubility (25 °C): 1.6 g/L.
Packing density: 0.4–0.6 g/cm³.
1 percent decomposition temperature: ≥350 °C.
Thermal cracking temperature: ≥350 °C (N₂, 20 °C/min).
Halogen content: None.
Recommended addition levels:
PA6 / PA66: 15–20 percent.
PBT / PET: 20 percent.
PA GF systems: 18–22 percent.
Polyester alloys: 15–20 percent.

Download Technical Data Sheet (TDS)

Practical industry uses

Applications

Electrical and electronics: Connectors, switches, terminal blocks, housings, bobbins, circuit protection parts.
Automotive: Under-hood components, sensor housings, charge controllers, fuse boxes, PA-based structural parts.
Industrial and mechanical: High-temperature gears, pump parts, engineering components.
Consumer appliances: High-heat structural components and internal parts.
Telecom and 5G: High-CTI connectors, fibre-optic brackets, RF housings.
Sustainable engineering plastics: PET/PBT recycled blends and polyester composites.
Compatible polymers: PA6, PA66, PPA, PBT, PET, PTT, TPEE, polyester alloys (PBT/PET, PET/ABS, PBT/PC).