Abstract: A method of encapsulating an amphiphilic flavor or fragrance compound into a microcapsule having a hydrogel shell and an oil core. The flavor or fragrance compound is transported into and solubilized in the core by partition coefficient equilibrium using water in the capsule wall to transport the compound into the core. Microcapsules made by the method of the invention may have a wall thickness and contain a high concentration of the flavor or fragrance compound that has not previously been feasible.

Abstract: A process for forming microcapsules having discrete capsule walls comprising the steps of:forming an emulsion of an oily core material phase in a continuous aqueous phase, said oily core material phase including isocyanatoacrylate or cyanoacrylate prewall reactants which react with said aqueous phase to form a pre-wall material around said oily core material phase; andenwrapping particles of said oily core material phase in an amine-formaldehyde condensation product produced by in situ condensation of an amine and formaldehyde, and the microcapsules produced thereby are disclosed.

Abstract: A process for producing photosensitive microcapsules having an extended dynamic range and the microcapsules produced thereby are disclosed; the process includes:(a) providing an emulsion of a multiplicity of droplets of an internal phase in a continuous phase; said internal phase including a photohardenable or photosoftenable composition and an image-forming agent wherein the composition of said internal phase incrementally or continuously varies; and(b) forming a wall around said droplets.

Abstract: A process for preparing microcapsules which comprises dispersing a hydrophobic oily liquid in a continuous aqueous phase, the hydrophobic oily liquid containing a pre-wall former and at least one chain extender, the chain extender being a polyhydric compound which is capable of reacting with the pre-wall former at a rate such that the chain extender does not substantially react with the pre-wall former prior to dispersing the hydrophobic oily liquid in the continuous aqueous phase; and forming capsule walls around the droplets of hydrophobic oily liquid in the continuous aqueous phase.

Abstract: The present invention is directed to a method for preparing microcapsules which comprises:preparing an aqueous dispersion or emulsion of a hydrophobic oily core material containing a polyvalent isocyanate, a polyvalent isothiocyanate, or an adduct thereof, having an anionic moiety; andforming capsule walls around the droplets of said oily core material.