Patent ID: 8685425

Claim:
Microcapsules containing a water-immiscible core material, wherein the microcapsules are produced by a method comprising: (a) forming an emulsion comprising droplets of a water-immiscible core material in a first aqueous solution of an amphiphilic first wall-forming reactant that preferentially accumulates at the surface of the droplets; (b) forming a second aqueous solution of a second wall-forming reactant; and (c) combining the emulsion with the second aqueous solution to permit a reaction between the first and second reactants such that the resulting reaction product forms an encapsulating wall surrounding the core material of each emulsion droplet to encapsulate a core consisting of the water-immiscible core material; wherein one of said first and second reactants comprises a Lewis base reactant and the other comprises a Lewis acid reactant, wherein the reaction product consists of a salt of the Lewis base-Lewis acid reactant pair, wherein the method of forming the microcapsules is performed in the absence of organic solvents and the microcapsules are free of organic solvents, and wherein the water-immiscible core material comprises a material selected from the group consisting of flavorants, silicones, triglycerides, waxes, and vaporizable active agents selected from the group consisting of fragrances, insect repellents and arthropod repellents.