an ion exchange resin composition which comprises the reaction product of an epihalohydrin with a polyamine is alkylated . the polyamine has a molecular weight of from about 60 to about 298 . this invention also encompasses a process for preparing the ion exchange resin composition which comprises reacting from about two - thirds of a stoichiometric amount of epihalohydrin to one and one - half times the stoichiometric amount of epihalohydrin with defined polyamines and thereafter reacting the resultant polymer with an alkylating agent to yield the final product .