Flame Retardants, Red Phosphorus

PG-50 Red Phosphorus Flame Retardant Paste

PG-50 is a microencapsulated red phosphorus flame retardant paste designed for coatings, epoxy systems and polymer formulations that require high flame-retardant efficiency with safe and clean processing. Its non-dusting paste form eliminates handling risks associated with powder red phosphorus while maintaining a high phosphorus content of 45–55 percent. PG-50 disperses easily, provides stable performance at low addition levels and supports halogen-free, RoHS- and REACH-compliant flame-retardant formulations.

Attributes

Key Features and Benefits

High flame-retardant efficiency provides strong performance at low loadings.
Safe, non-dusting paste improves handling and reduces contamination risk.
Halogen-free formulation compliant with RoHS and REACH.
45–55 percent phosphorus content for efficient char formation.
Excellent dispersion stability with no settling or separation.
Broad compatibility with epoxy, polyurethane, phenolic and coating systems.
Easy metering and controlled dosing due to paste viscosity.
Significantly reduced phosphine evolution for improved processing safety.

Specifications

Technical Highlights

Appearance: Red viscous fluid.
Phosphorus content: 45–55 percent.
pH: 6.0–8.0 (ASTM E70).
Particle size (D50): ≤15 µm.
Viscosity: 3,000–7,000 mPa·s at 25 °C (Brookfield).
White phosphorus content: ≤0.005 percent.
Density: ~1.4 g/cm³ (ASTM D792).
Recommended addition: 5–15 percent depending on system.
Flame-retardant type: Microencapsulated red phosphorus.

Download Technical Data Sheet (TDS)

Practical industry uses

Applications

Electrical & Electronics: PCB coatings, insulating coatings, encapsulants
Epoxy Resins & Composites: Structural epoxy, electrical epoxy, potting and casting compounds
Industrial Coatings: Intumescent coatings, protective coatings, industrial paints
Adhesives & Sealants: Epoxy adhesives, silicone-modified adhesives
Textile & Varnish Systems: Halogen-free treatment coatings and binder systems
Material Compatibility: Epoxy resins, Polyurethane resins, Phenolic systems, Solvent-based and water-based coatings, Flame-retardant encapsulants and sealants