Flame Retardants, Polystyrene (PS)

PSV2-5 Red Phosphorus Flame Retardant Masterbatch

PSV2-5 is a high-efficiency red phosphorus-based flame retardant masterbatch designed for polystyrene materials including PS, XPS and EPS. It combines microencapsulated red phosphorus, a controlled low-bromine component, and synergistic additives to deliver UL94 V-2 performance at only 5–6 percent loading. Its high thermal stability and oxidation-resistant encapsulation make it suitable for demanding foam extrusion and molding applications. PSV2-5 provides strong flame-retardant efficiency with clean processing and enhanced safety compared with powder red phosphorus systems.

Attributes

Key Features and Benefits

Achieves UL94 V-2 at only 5–6 percent addition.
Microencapsulated red phosphorus improves oxidation stability and dispersion.
Low bromine content (≤900 ppm) supports halogen-controlled requirements.
High thermal stability (≥230 °C) suitable for XPS extrusion conditions.
Fine ≥1500 mesh particles ensure uniform melt distribution.
Pellet form eliminates dust, improves safety, and simplifies feeding.
Strong LOI improvement and carbon-layer formation during burning.
Compatible with PS, XPS, EPS, and modified polystyrene systems.

Specifications

Technical Highlights

Appearance: Red masterbatch pellets.
Flame retardant content: ≥60 percent.
Particle size: ≥1500 mesh.
Bromine content: ≤900 ppm.
Decomposition temperature: ≥230 °C.
Recommended addition: 5–6 percent.
UL94 rating (2.0 mm): V-2 typical; V-0 possible with optimized formulation.
Classification: Non-dangerous goods.

Download Technical Data Sheet (TDS)

Practical industry uses

Applications

Thermal insulation: XPS foam boards, EPS insulation panels, cold storage panels.
Packaging foams: EPS molded packaging, impact-resistant PS foams.
Consumer goods: Decorative PS parts, appliance components.
Construction: Fire-rated PS materials for panels and interior systems.
Compatible resins: GPPS, HIPS, EPS bead foam, XPS extrusion-grade polystyrene, Modified PS blends