???S???, ???C02, ???S02-, -0-C0-, C1-C10 lower alkyl, C1-C10 halogenated alkyl, C2-C10 lower alkyleneoxy, aryleneoxy, polyoxyalkylene or polyoxyarylene, and wherein n is an integer of from about 1 to 10; and primary aminoalkyl terminated di- and polysiloxanes.