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HF-221B is a phosphorus-based halogen-free environmentally friendly flame retardant designed for epoxy resin composites and encapsulating adhesives.
HF-221B is a phosphorus-based halogen-free environmentally friendly flame retardant designed for epoxy resin composites and encapsulating adhesives. It achieves high-efficiency flame retardant performance through a molecular-level synergistic flame retardant mechanism, while also taking into account the mechanical properties of the materials and processing stability. Its halogen-free formula fully complies with environmental protection regulations such as RoHS and REACH. It is suitable for high-end fields such as electronics and electrical appliances, aerospace, new energy vehicles, and rail transit, providing safe and reliable flame retardant protection for high-performance materials
| Appearance | Average particle size | Water solubility | Water content | True Density | pH | Bulk density | Decomposition temperature | Phosphorus content | Nitrogen content | Cr, Cd, Pb, Hg, As | Whiteness |
| White powder | 3~7μm | ≤0.2g/100ml | ≤0.3% | 1.6±0.1 g/cm³ | 3.5~4.5 | 0.4~0.6 g/cm³ | ≥300℃ | ≥19% | / | / | ≥92 % |
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