Flame Retardants

VP-22E Halogen Free Aluminum Diethylphosphonate Flame Retardant

VP-22E is a halogen free organic phosphorus flame retardant based on aluminum diethylphosphonate. It is developed for engineering plastics including PA 6, PA 66, PBT, and PET. The product provides strong thermal stability, low smoke generation, and reliable UL94 V-0 performance at 10 to 18 percent loading. It keeps mechanical properties stable and supports clean processing. VP-22E is a direct equivalent to OP-1230 and works effectively with nitrogen-based synergists such as MCA and MPP.

Attributes

Key Features and Benefits

• Halogen free formulation supports safer and environmentally compliant compounds.
• Achieves UL94 V-0 at 2 mm with 10 to 18 percent dosage.
• Provides excellent thermal resistance with 1 percent weight loss at 350 °C.
• Produces low smoke density for clean combustion applications.
• Maintains tensile and impact strength in reinforced and unreinforced systems.
• Offers high CTI values for electrical insulation components.
• Performs strongly with MCA or MPP for enhanced flame retardancy and drip resistance.
• Offers stable colour and dispersion suitable for light or dark compounds.

Specifications

Technical Highlights

• Appearance: White powder.
• Chemical composition: Aluminum diethylphosphonate.
• Phosphorus content: 22 to 24 wt percent.
• Volatile matter: ≤ 0.5 wt percent.
• Particle size (D50): 30 to 50 μm.
• Water solubility (20 °C): ≤ 0.3 percent.
• pH (10 g/L @ 25 °C): 4 to 5.
• Bulk density: 0.5 to 0.8 g/cm³.
• TGA 1 percent weight loss: 350 °C.
• TGA 5 percent weight loss: 400 °C.
• Recommended addition level: 10–18 wt percent.
• Processing temperature: 240–300 °C (depending on polymer).

Download Technical Data Sheet (TDS)

Practical industry uses

Applications

• Electrical and electronics parts including connectors, switches, relays, terminal blocks, and circuit protection elements.
• Automotive components such as under-hood parts, ducts, charging connectors, and interior fittings.
• Appliance housings and structural elements including enclosures, plugs, sockets, and motor parts.
• Construction profiles, conduits, and molded pieces requiring certified flame safety.
• Engineering compounds in PA/PBT glass fibre systems and technical polymer alloys.
• Compatible polymers: PA 6, PA 66, PA 6T blends, PBT, PET, PP/PE blends with compatibilizers, TPU, TPE, PPE, PPS and related blends.