PQ-75M is a phosphorus-nitrogen-based intumescent halogen-free flame retardant masterbatch designed primarily for polypropylene and long-glass-fiber-reinforced polypropylene products, while also suitable for other high-end polyolefin flame-retardant applications.
The product integrates three key functional components—acid source, gas source, and carbon source—and achieves its flame-retardant effect through an intumescent charring mechanism. The formulation is free of ammonium polyphosphate, addressing the issue of water slippage during polyolefin extrusion processing, and offers excellent thermal stability, dispersibility, and flame retardancy efficiency. Materials modified with this product can achieve a UL 94 V-0 flame retardancy rating for 1.5 mm thick test specimens, with a LOI of 32 or higher; When blended with other gas-generating and acid-based flame retardant monomers, flame retardancy is further enhanced, meeting the requirements for 0.75 mm UL 94 V-0, GWIT 750°C, and GWFI 960°C, and passing the UL 746C standard 70°C/168-hour water immersion test.
Modified products feature low density and low smoke density, and fully comply with international environmental regulations such as RoHS and REACH. Applications include polyolefin sheets, glass-fiber-reinforced polypropylene parts, high-speed train interiors, and flame-retardant components for locomotives and rolling stock.
