In this study two different types of ionic liquids (MI and DI) catalysed low temperature curable benzoxazines (P-d and C-d) were developed for antimicrobial and dielectric applications. The N, N-dimethyl amino substituted benzoxazines were synthesized using N, N-dimethylamino propylamine (d), phenol (P) and cardanol (C), and paraformaldehyde through Mannich condensation. The benzoxazines were structurally confirmed using FTIR and 1H NMR analyses. Ionic liquids such as methyl- imidazolium iodide (MI), diamethylaminopropyl-iodide (DI) were synthesized and incorporated into benzoxazines at different (wt%) weight percentages. The curing behaviour was studied using DSC analysis, and found that the benzoxazines, viz., P-d and C-d in the absence of ionic liquid (MI and DI) catalysts show the curing temperatures of 208 °C and 226 °C respectively. Whereas the benzoxazines in the presence of ionic liquid (MI and DI) catalysts resulted in the reduction of curing temperatures of about 40-50 °C from their corresponding curing temperatures observed in the absence of catalysts. Also, all the cured samples were analysed for their thermal stability and char yield using TGA analysis. Among the samples studied, poly(P-d) shows the higher char yield, whereas the catalysed benzoxazines tend to possess the lower char yield. Further, the catalysed benzoxazines, viz., P-d and C-d greatly influence the anti-microbial nature and resulted in the zone of inhibition values of greater than that of non-catalysed benzoxazines against S. aereus and E. coli. It was also observed that the ionic liquids have greater impact in dielectric behaviour of the polybenzoxazines by increasing the value of dielectric constant up to 8.28 with minimal dielectric loss values. Data obtained from different studies, infer that the ionic liquids catalysed low temperature curable benzoxazines developed in the present work can be efficiently used in the field of anti-microbial coatings as well as in high dielectric applications.