r 34 is h or acetyl and quaternary salts of the type r f ch 2 ch 2 sch 2 ch oh ch 2 n ch 3 3 cl the aqueous emulsions of this invention are preferably prepared by dissolving the emulsifier in water and then slowly adding the fluorocarbon silane employing standard agitation techniques after the materials are thoroughly blended the emulsions should stand for up to 72 hours with or without further agitation to allow them to fully generate the equilibrium stable composition however in principle the emulsifier can be added to an already emulsified water hydrolyzable silane mixture provided that significant irreversible self condensation has not taken place analysis of the unique aqueous emulsions of this invention by nuclear magnetic resonance spectroscopy indicates that the alkoxysilanes have undergone hydrolysis to produce hydroxysilanes that are believed to posses the structure str5 and possibly low molecular weigh oligomers thereof however unlike trihydroxysilanes in water mixtures without the emulsifier these silanes do not undergo condensation to produce insoluble polymeric structures but remain in a stabilized emulsified state in the aqueous formulation the emulsions normally are essentially colorless completely clear water formulations particle size measurements by light scattering techniques coulter n4md instrument show particle sizes of from less than 10 nm to about 300 nm indicative of true microemulsions or emulsions rather than solutions most frequently the particle sizes range from.