RETENTION AGENTS OF POLYETHYLENEIMINE AND POLYAMINAMIDE EPICHLORHIDRINIC TYPE. SYNTHESIS, CHARACTERISATION, PROPERTIES Two macromolecular products, of polyethyleneimine and of polyamineamide type, were synthesized by the polycondensation of triethylenetetramine with 1,2 dichloroethane with adipic acid and e-caprolactam, respectively. The secondary amine groups of the two polymers were substituted with specific agents, e.g. the reaction product between triethylamine and epichlorohydrin and/or 1,2 dichloroetane, in order to produce their cationization. The intermediates and the polymers were characterized by FTIR spectroscopy, elemental analysis, solution viscometry and polyelectrolyte titration. Some properties of the synthesized polymers such as molecular weight, charge density, inability to crosslink, recommended them as retention or drainage agents in the papermaking, or as purification agents in the waste water treatment.