Silicone vesicles and entrapment

A composition comprising a water-soluble substance entrapped in a vesicle formed from 0.1 to 40.0 percent by weight of a siloxane surfactant, the vesicle being formed by dissolving 0.1 to 10.0 percent by weight of the substance to be entrapped in water, adding the siloxane surfactant, and mildly agitating 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.