Patent ID: 6767637
Filing Date: 2004-07-27
Classification: A61K,A61L,B01J,Y10T

Abstract:
A method for preparing a microencapsulated composition, comprising:providing an aqueous solution containing a composition to be encapsulated dissolved therein; providing a polymer solution containing a water-insoluble polymer dissolved in a hydrophilic solvent; generating a plurality of first microdroplets from the aqueous solution; generating a plurality of second microdroplets from the polymer solution, wherein the first and second microdroplets are generated by at least one ultrasonic atomizer; and contacting the first and second microdroplets to form a plurality of pre-encapsulant particles, which have a core domain containing said composition and an outer layer containing said polymer, such that solvent exchange occurs between the core domain and the outer layer so as to afford a plurality of microcapsules containing said composition.