Method of producing microcapsules
AssigneeRoyal College of Surgeons In Ireland
InventorZebunnissa Ramtoola
Life of this patent
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Abstract
A method of producing microcapsules of the type having a core and a coating encapsulating the core comprises the steps of providing a core-forming fluid stream and a coating-forming fluid stream, providing a two spray nozzle arrangement having a core nozzle disposed concentrically about a second nozzle, spraying the core-forming fluid stream from the core nozzle and the coat-forming fluid stream from the concentric nozzle to produce microcapsules, and solidifying the microcapsules upon formation in a suitable gas. Spray drying or spray chilling may be employed as the means of solidifying the microcapsules. Microcapsules having a core and a solid coat are also described.
Claims21
1-51. (canceled)
A method of producing microcapsules of the type having a core and a coating encapsulating the core, the method comprising the steps of providing a core-forming fluid stream and a coating-forming fluid stream, providing a two spray nozzle arrangement having an outer nozzle disposed concentrically about a core nozzle, spraying the core-forming fluid stream from the core nozzle and the coat-forming fluid stream from the outer nozzle to produce microcapsules, and solidifying the microcapsules upon formation in a suitable gas.
Microcapsules having a solid or fluid core encapsulated within at least one solid coat, and having a D50% of less that 100μ.
Dependencies are inferred from the claim text.