Cardanol-based benzoxazine and its potential with ammonium polyphosphate in flame-retardant coatings

Key Points

• The goal is to optimize the synthesis of bio-based polybenzoxazine from cardanol and assess its flame-retardant properties.
• Optimized bio-based synthesis of polybenzoxazine from cardanol and hexamethylenetetramine
• Evaluated the impact of ammonium polyphosphate on flame retardancy
• Analyzed char layer homogeneity
• Polybenzoxazine exhibits high thermal stability
• Ammonium polyphosphate significantly enhances flame retardancy
• Improved char layer homogeneity observed with the addition of ammonium polyphosphate