BZ-HC191 is a halogen-free flame retardant specifically designed for PA6, PA66, and PBT, utilizing phosphorus and nitrogen as the primary flame-retardant elements. It complies with RoHS and REACH regulations and offers high flame-retardant efficiency, excellent thermal stability, no precipitation, good water resistance, light aging resistance, low smoke, and non-toxic properties. BZ-HC191 exhibits very high thermal stability with a decomposition temperature of ≥360°C.