A process for preparing a new curing agent for epoxy resins, consisting of a soluble compound of primary diamine, of the formula ** (see formula) ** Where n is a number from 0 to 4, and r is a group ** (see formula) ** R1 being a ring of six unsubstituted carbon atoms attached in position for which process comprises reacting a diepoxide of the formula: ** (see formula) ** Where n is a number from 0 to 4 and r is a group ** (see formula) ** R being a ring of six carbon atoms unsubstituted and connected in the para position, with ammonia at least twice the theoretical amount for the reaction of a molecule of ammonia with an epoxide group. (Machine-translation by Google Translate, not legally binding)
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