Production and characterization of the halogen-free and nanostructured flame retardant reinforced composite coatings

In this study, composite coatings reinforced with huntite/hydromagnesite, antimony (III) oxide (Sb₂O₃), and boric acid minerals having the inorganic-based flame retardant properties were produced. Before the composite coatings were produced, the huntite/hydromagnesite and Sb₂O₃ were reduced to the nano-size by milling. The structural, chemical, and morphological properties of the reinforcement materials and composite coatings were characterized by PSD, XRD, XPS, FT-IR, and SEM devices. In addition, thermal and flame retardant properties of composite coatings were performed by DTA-TG and candle flame test (according to IEC 62441 standard) method. The mean particle sizes of the huntite/hydromagnesite and Sb₂O₃ reinforcement materials after milling were determined as 121 and 141 nm. When we examined the thermal behavior and flame retardant properties, the reinforced composite coatings according to the pure paint exhibited very good flame retardant properties. Of these materials, the best results were determined in 10% huntite/hydromagnesite reinforced composite coatings.