CHARACTERIZATION OF NOVEL CATIONIC AMINOHYDROXYSILOXANES

A new family of nonionic and cationic amino-hydroxy functional siloxan es have been prepared and characterized. The surface-active properties of such siloxanes can be tailored, enabling their use as a new genera tion of surfactants. Three siloxane polymers having the empirical form ula of Me3SiO-(SiMe2O)x(SiMeHO)ySiMe3, where (1) x = 0, y = 0, i.e., M e2HSiOSiHMe2; (2) x = 0, y = 33; and (3) x = 150, y = 23, were hydrosi lylated with allyl glycidyl ether to form epoxysiloxanes in high yield s. Various amines react with these epoxysiloxanes to give nonionic ami nohydroxysiloxanes also in good yield. Cationic species are obtained u pon protonation of the amino nitrogen on the nonionic siloxane side ch ain, with hydrogen bromide solution. Characterization of all surfactan ts by FT-IR and NMR spectroscopy is reported. In addition, two-dimensi onal NMR, studies could accurately elucidate the structure of the orga nic side groups present.