Polyethylenimine (PEI) or polyaziridine is a polymer with repeating unit composed of the amine group and two carbon aliphatic CH2CH2 spacer. Linear polyethyleneimines contain all secondary amines, in contrast to branched PEIs which contain primary, secondary and tertiary amino groups. Totally branched, dendrimeric forms were also reported. PEI is produced on industrial scale and finds many applications usually derived from its polycationic character.
P 0578 (OTTO) Polyethylenimine, branched average Mw ~25,000 by LS, average Mn ~10,000 by GPC Cas 9002-98-6 - used as a polyelectrolyte multilayer on charged surfaces to provide a biocompatible coating on surfaces.