Abstract: Process for manufacturing reservoir microcapsules containing an active principle in a polymer shell comprising the steps of: (iii) dispersion of a lipophilic active principle in an aqueous continuous phase, forming an oil-in-water emulsion, (iv) introduction into the lipophilic phase of one or more compounds A bearing alkoxysilane groups, (v) introduction into the aqueous phase of amine-containing organic monomers B comprising at least one group selected from melamine, urea, glycoluril, benzoguanamine or dicyandiamide groups and one or more aldehydes, or pre-polymers thereof and (vi) hydrolysis and polymerization, in situ, of the compounds A and B in an acid medium to give a silicone polymer and an amine-containing polymer, bonded together by polar, hydrogen or covalent bonds, forming the wall of the shell of the microcapsules, containing the active principle.

Abstract: An absorbent article can include, in an immobilized form: a) microcapsules formed, in a proportion of at least 25% by weight relative to the total weight of polymer(s) forming the microcapsules, of a material derived from at least one natural polymer, a protein analog thereof, or a derivative thereof, and charged with at least one active agent, and b) at least one release agent that is capable of stimulating the dissolution of the microcapsules during the placing of the absorbent article in contact with an aqueous medium, and chosen from enzymes, surfactants that are water-soluble at room temperature and atmospheric pressure, and mixtures thereof, the microcapsules a) and the release agent b) being present in the said article in a form isolated from each other.

Abstract: An absorbent article can include, in an immobilized form: a) microcapsules formed, in a proportion of at least 25% by weight relative to the total weight of polymer(s) forming the microcapsules, of a material derived from at least one natural polymer, a protein analogue thereof, or a derivative thereof, and charged with at least one active agent, and b) at least one release agent that is capable of stimulating the dissolution of the microcapsules during the placing of the absorbent article in contact with an aqueous medium, and chosen from enzymes, surfactants that are water-soluble at room temperature and atmospheric pressure, and mixtures thereof, the microcapsules a) and the release agent b) being present in the said article in a form isolated from each other.

Abstract: A microcapsule having a reservoir that includes a core containing at least one active principle, the core being surrounded by a polymer shell, is presented. The polymer shell contains 50% to 100% by weight of a silsesquioxane compound with respect to the total weight of the shell. A process for the manufacture of the microcapsules is also presented. The microcapsules containing active principles can be used in cosmetic products.

Abstract: A microcapsule having a reservoir that includes a core containing at least one active principle, the core being surrounded by a polymer envelope, characterized in that that polymer envelope is formed from 50 to 100% by weight of a silsesquioxane type compound, relative to the total weight of said envelope. A process for manufacturing the aforementioned capsule, and also the use thereof for manufacturing cosmetic products.