Encapsulation system with organic core and mineral cortex based on aluminium hydroxycarbonate and preparation method

Abstract

An encapsulation system comprising: a core formed wholly or in part of at least one organic active principle; an inorganic shell formed wholly or in part of aluminum hydroxycarbonate; and wherein cohesion of the system is achieved by means of at least one nonionic surfactant comprising at least one hydrophobic segment and at least one hydrophilic segment. Also, a process for the preparation of an encapsulation system having an organic core, composed wholly or in part of at least one organic active principle, and an inorganic shell composed wholly or in part of a basic aluminum carbonate, includes: the in situ precipitation in an aqueous medium of basic aluminum carbonate, at a pH of less than 5, with stirring, in the presence of at least one nonionic surfactant, having at least one hydrophobic segment and at least one hydrophilic segment, and at least one organic active principle, the recovery of the aqueous dispersion thus formed.

Dependencies are inferred from the claim text.