Synthesis of the effective flame retardant via modification of epoxy resin with phenylboronic acid

In this project, a novel flame retardant was synthesized using a modification of epoxy resin with phenylboronic acid in the presence of tetra-n-butyl ammonium bromide catalyst during reaction at 80–120 °C. The flame retardant was prepared from the polymerization process without solvent and two ratios of phenylboronic acid. Then, using this obtained material, epoxy coating formula 828 was prepared and the effect of adding this compound was investigated then by examining the properties, the optimal sample was obtained. The results of the FTIR, NMR, TGA and DSC analysis confirmed the successful synthesis of flame retardant compounds. The curves obtained from the calorimetric test showed an increase in the efficiency of coal production and thermal resistance of the samples containing flame retardants. The rate of thermal degradation of the samples decreased from 100% for the pure epoxy coating to 94% and 87% for BE1 and BE2 samples containing flame retardant, respectively. The limited oxygen index increased from 21.8% for the pure epoxy sample to 26.6% and 31.2% for BE1 and BE2 samples, respectively. Examination of flame resistance properties showed that the coating containing 20% by weight of flame retardant BE2 had better results.