Patent ID: 9717693
Date: 2017-08-01
CPC Classifications: A23K,A61K

Claim:
1. A system for the controlled release of one or more physiologically or pharmacologically active substances, comprising compositions in the form of microparticles or granules, particularly for use in the zootechnical and/or veterinary field, comprising: a core which contains one or more active ingredients selected from substances having a pharmacological action, food supplements, or diagnostic media, said one or more substances being characterized by the presence, within their chemical structure, of a cationic function or of an anionic function or of a function which is neutral but can be easily ionized, obtaining a net charge, mixed or adsorbed with a hydrated silicate selected from the group consisting of magnesium, aluminum, calcium and sodium hydrated silicates in an amount between 20 and 80 percent by weight of the core, which chemically interacts with the one or more active ingredients and are capable of absorbing water and causing reversible swelling, said core being coated by a double fatty layer constituted by a first inner layer, which comprises a fat having melting point from between about 63 to about 90° C. and is in contact with the core, and a second outer layer, which comprises a fat having a lower melting point than the fat in the first layer; and wherein the silicate is selected from the group constituted by smectite, montmorillonite or bentonite.