METHOD FOR PRODUCTION OF SINGLE- AND MULTI-LAYER MICROCAPSULES

摘要

The present invention provides methods for microencapsulation of active ingredients for topical application, whereby single-layer and multi-layer, preferably double-layer, microcapsules, are obtained. The microcapsules protect the active ingredients, maintain their original activity throught processing, formulation and storage, and enable controlled release of the active ingredient only upon application onto the skin. The microcapsules consist of a cone made of an encapsulated active ingredient and one or more shells of the same of different wall-forming polymer. The microencapsulation methods of the present invention are based on the solvent removal method.