Aqueous solvent encapsulation method, apparatus and...

A - Human Necessities – 61 – K

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A61K 9/50 (2006.01) A61K 39/12 (2006.01) B01J 13/02 (2006.01) B01J 13/06 (2006.01)

Patent

CA 2187768

A microcapsule substantially free from non-aqueous contaminants comprising an aqueous core surrounded by a capsular wall, the capsular wall being the reaction product of a selected water soluble anionic polymer or salt thereof with a selected water soluble amine or salt thereof, the selected anionic polymer and amine having the property that, when droplets of an aqueous solution of the selected polymer are introduced into an aqueous solution of the selected amine, stable microcapsules of the amine salt of the anionic polymer are formed. The aqueous core of the microcapsule may contain any of various active ingredients, including immunogenic agents such as rotavirus. A method and apparatus for making the microcapsules, including microcapsules comprising active agents, as well as their method of use, are also disclosed.

La présente invention concerne une microcapsule essentiellement exempte de contaminants non aqueux et se composant d'un noyau aqueux entouré d'une paroi capsulaire. Ladite paroi capsulaire est le produit de réaction d'un polymère anionique hydrosoluble sélectionné, ou de l'un de ses sels, avec une amine hydrosoluble sélectionnée, ou l'un de ses sels. Le polymère anionique sélectionné et l'amine sont caractérisés par la formation de microcapsules stables du sel d'amine du polymère anionique lors de l'introduction des gouttelettes d'une solution aqueuse du polymère sélectionné dans une solution aqueuse de l'amine sélectionnée. Le noyau aqueux de la microcapsule peut contenir l'un quelconque des principe actifs, y compris des agents immunogènes tels qu'un rotavirus. L'invention concerne également un appareil et un procédé de fabrication des microcapsules, y compris des microcapsules renfermant des agents actifs, ainsi que leurs procédés d'utilisation.

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