The imidazole core based (nitrile) cyano-derivative was synthesized using terephthalaldehyde and diammomaleonitrile in the presence of xylene solvent at 135°C for 12 hours in the absence of any catalysts with yield of about 86%. The product resulted was characterized for its molecular structure, storage stability and cure behavior. The varying weight percentage quantities of imidazole core based (nitrile) cyano-derivative was mixed with different combination of epoxy resin having epoxy equivalents of 180-190 with varying nature of amine curatives, viz., DDM, DDE, DDS, DICY, and melamine and their curing temperature and storage life were ascertained. The optimum weight percentage of latent thermal initiator required for one pack epoxy systems was found to be lwt%. The storage stability was found to be I to 2 days for epoxy-DDM with TDMN and all other systems comprising epoxy resin with amines and TDMN thermal initiator have about 90 days. The polymerization (curing) temperature observed for DDM, DDE, DDS, DICY, and melamine based one pack epoxy systems with TDMN are 75, 150, 120, 150 and 180°C respectively. The present invention offers number of advantages over conventional latent thermal initiators in terms of method of production in the absence of any catalysts, efficiency of catalytic activity relatively with lower weight percentage, cure behavior, energy saving and ease of formulation and fabrication of composite components. The latent thermal initiator also acts as cross-linker and structural modifier, capable of influencing thermal stability and strength properties due to their bulky hetero-cyclic molecular structure. The present invention is considered as the cutting-edge concept in the field of latent thermal initiator for epoxy curing technology.