Core-shell particles and process for their preparation

Details Core-shell particles and process for their preparation Core-shell particles and process for their preparation

B - Operations, Transporting

01

J

B01J 13/16 (2006.01) B01F 17/00 (2006.01)

Patent

CA 2427939

A particulate composition comprising particles having a core comprising a hydrophobic polymer within a shell, characterised in that the shell comprises a semi-permeable membrane. Particulate composition can be used for making a stable dispersion of particles uniformly distributed throughout a first hydrophobic liquid, wherein the particles comprise a core within a shell and the core comprises a hydrophobic polymer into has been imbibed a second hydrophobic liquid. Compositions can be used to encapsulate active substances and may be used in sustained release mechanisms.

La présente invention concerne une composition particulaire comprenant des particules possédant un noyau comprenant un polymère hydrophobe contenu dans une enveloppe, caractérisée en ce que l'enveloppe comprend une membrane semi-perméable. Ladite composition particulaire peut être utilisée pour préparer une dispersion stable de particules uniformément réparties dans un premier liquide hydrophobe, dans lequel les particules comprennent un noyau contenu dans une enveloppe et le noyau comprend un polymère hydrophobe qui a été imbibé d'un deuxième liquide hydrophobe. Lesdites compositions peuvent être utilisées pour encapsuler des substances actives et peuvent être utilisées dans des mécanismes à libération prolongée.

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