Flame Retardants

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