Flame Retardants, Red Phosphorus

RP-TP46 Red Phosphorus Flame Retardant Paste

RP-TP46 is a halogen-free microencapsulated red phosphorus flame retardant paste formulated for polyurethane foams, rubber compounds, coatings and polymer composites. Its oil-based carrier system provides high stability, consistent viscosity and safe, dust-free handling. The fine particle size ensures uniform dispersion, strong flame-retardant efficiency and reliable char formation at low addition levels. RP-TP46 eliminates common powder-based issues such as dusting, phosphine release and sedimentation, making it ideal for liquid-processing environments.

Attributes

Key Features and Benefits

Non-dusting paste greatly improves operator safety and plant hygiene.
≥40 percent microencapsulated red phosphorus ensures high flame-retardant efficiency.
Fine particle size (≤15 μm D50) delivers excellent dispersion and uniform performance.
Stable, non-stratifying paste prevents settling during storage.
Low white phosphorus content (≤0.005 percent) enhances storage stability and safety.
High viscosity stability (3,000–7,000 mPa·s) supports accurate and repeatable dosing.
Halogen-free formulation meets global sustainability and regulatory standards.
Compatible with PU foams, rubbers, epoxy, phenolic and coating systems.
Customizable particle size range (1500–2500 mesh) available on request.

Specifications

Technical Highlights

Appearance: Red viscous paste.
Microencapsulated red phosphorus (MRP): ≥40 percent.
pH: 6.0–8.0 (ASTM E70).
Particle size (D50): ≤15 μm.
Particle size (D95): ≤75 μm.
Viscosity: 3,000–7,000 mPa·s @ 25 °C (Brookfield).
White phosphorus content: ≤0.005 percent.
Optional particle sizes: 1500–2500 mesh.
Density: ~1.3–1.4 g/cm³ (ASTM D792).
Carrier system: Oil-based matrix.

Download Technical Data Sheet (TDS)

Practical industry uses

Applications

Polyurethane foam manufacturing (flexible and rigid foams).
Plastics compounding for PA, PBT and PET systems requiring liquid-phase dosing.
Rubber and elastomer production (gaskets, seals, technical rubber parts).
Industrial coatings including halogen-free and low-smoke systems.
Adhesives and sealants, especially PU-based systems requiring enhanced fire resistance.