Procedure to prepare aminoplastic microcapsules

摘要

An aminoplastic core-shell microcapsule, of a single cover, which can be obtained by a process comprising the steps of: 1) mixing a perfume oil with at least one polyisocyanate having at least two isocyanate functional groups to form a oil phase; 2) dispersing or dissolving in water an aminoplast resin and, optionally, a stabilizer to form an aqueous phase; 3) add the oil phase to the aqueous phase to form a dispersion of oil in water, in which the average droplet size is between 1 and 100 μm; 4) perform a curing step to form at least one microcapsule in the form of a liquid dispersion; and 5) optionally drying the liquid dispersion to obtain at least one dry core-shell microcapsule; characterized in that the aminoplast resin is added in an amount such that the w / w ratio between the aminoplast resin and the perfume oil in the dispersion is between 0.001 and 0.09