Silicone vesicles and entrapment

A method of entrapping a water-soluble substance in a vesicle formed from a siloxane surfactant comprising forming a mixture by dissolving the substance to be entrapped in water, adding a siloxane surfactant, mildly agitating the mixture, and removing excess of the water and the substance from the mixture, the siloxane surfactant being an organosilicon compound having a formula selected from the group consisting of:

• ##STR2## wherein Me is the methyl group;
• R is a radical selected from the group consisting of methyl, --(CH.sub.2).sub.x O(C.sub.2 H.sub.4 O).sub.y (C.sub.3 H.sub.6 O).sub.z R', and --(CH.sub.2).sub.x N.sup.+ R.sub.3 "A.sup.-, with the proviso that at least one R radical in the molecule cannot be a methyl radical;
• R' is selected from the group consisting of hydrogen, a methyl radical, and an acyl radical;
• R" is selected from the group consisting of alkyl radicals having from one to six carbon atoms, a phenyl radical, a benzyl radical, and the radical --CH.sub.2 CH.sub.2 OH;
• A.sup.- is a counterion selected from the group consisting of chloride, bromide, iodide, cyanide, a methyl sulfate radical, a salicylate radical, and a dodecylsulfate radical;
• a has a value of 0 to 200;
• b has a value of 0 to 50;
• with the proviso that a and b cannot each be zero;
• x has a value of 3 to 6;
• y has a value of 4 to 30;
• and z has a value of 0 to 5.