Media in the form of complex dispersions, their process of...

A - Human Necessities – 61 – K

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A61K 9/127 (2006.01)

Patent

CA 2371977

The invention concerns novel media consisting of a first medium in the form of droplets wherein is dispersed a phase containing organised double layers of surfactants, preferably in the form of multilamellar vesicles, said droplets being in emulsion in a second medium called continuous phase non-miscible with the first medium. Said media can be used as base for cosmetic compositions. They can contain active principles, in particular for controlling their release and/or protecting and/or controlling their pH. They can also be used to make polymer microspheres containing an active principle. They are also useful as antigen vector.

L'invention concerne de nouveaux milieux sous forme de dispersion complexe, leur procédé de préparation et leurs utilisations. Ces milieux sont constitués d'un premier milieu sous forme de gouttelettes dans lesquelles est dispersée une phase contenant des bicouches organisées de tensioactifs, de préférence sous forme de vésicules multilamellaires, lesdites gouttelettes étant en émulsion au sein d'un deuxième milieu dit phase continue non miscible au premier milieu. Ces milieux peuvent être utilisés comme base de compositions cosmétiques. Ils peuvent renfermer des principes actifs, notamment pour contrôler leur libération et/ou les protéger et/ou contrôler leur pH. Ils peuvent également être utilisés pour fabriquer des microsphères de polymère renfermant un principe actif. Ils sont également intéressants en tant que vecteur d'antigènes.

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