does not have a comparable flame retardant effect and thus reduces the need for flame retadants in one embodiment the curable composition further comprises a curing agent any curing agent known in the art can be used in the compositions and processes disclosed herein suitable curing agents include organic acid anhydrides and phenols monoanhydride curing agents are preferred for ease of handling in an alternative embodiment the curable composition hereof does not include a separate curing agent it is found in the practice of this embodiment of the invention that the nucleophilic character of the amine group is much reduced by the presence of the triazine ring and the isoimide linkage it is further found that once one of the amine groups on the ring undergoes reaction the second amine group becomes still less reactive therefore in formulating the curable composition in this embodiment it is found that satisfactory results are achieved by treating each mole of the di isoimide of structure i as representing two equivalents from the standpoint of cross linking the epoxy a formulation on that basis that contains a 20 excess in equivalents of epoxy has been found to be satisfactory the curable composition hereof can include any and all of the numerous additives commonly incorporated into epoxy formulations in the art this.