H2 N-Ar[X-Ar]n NH2 wherein each Ar may individually be a mono-or polynuclear arylene radical, each X may individually be ##STR1## alkyl, and C2 -C10 lower alkyleneoxy, or polyoxyalkylene; and wherein n is an integer of from about 1 to 10; and primary aminoalkyl terminated di- and polysiloxanes.