Calyxia

Alicia Sadaoui

Jamie Walters

Damien Demoulin

Ludivine Mousnier

Todor Khristov

The present invention relates to a method for preparing solid microcapsules, comprising the following steps a) adding, with stirring, a composition C1 to a polymeric composition C2 comprising at least one aliphatic or aromatic ester or polyester, additionally bearing at least one function selected from the group consisting of acrylate, methacrylate, vinyl ether, N-vinyl ether, epoxy, siloxane, amine, lactone, phosphate and carboxylate functions and mixtures thereof, whereby an emulsion (E1) is obtained comprising droplets of composition C1 dispersed in a composition C2; b) adding, with stirring, the emulsion (E1) to a composition C3 whereby a double emulsion (E2) is obtained comprising droplets dispersed in the composition C3; c) applying shear to the emulsion (E2) whereby a double emulsion (E3) is obtained comprising droplets of controlled size dispersed in the composition C3; and d) polymerizing the composition C2, whereby solid microcapsules dispersed in the composition C3 are obtained.

Method for preparing biodegradable capsules and capsules obtained

The present invention relates to a method for preparing solid microcapsules that comprises of the following steps of preparing a composition C1, comprising at least one water-soluble or hydrophilic substance dispersed in a hydrophobic phase; adding, under agitation, of the said composition C1 in a polymeric composition C2, the compositions C1 and C2 being immiscible with each other, whereby an emulsion (E1) is obtained; adding, under agitation, of the emulsion (E1) in a composition C3, the compositions C2 and C3 being immiscible with each other, whereby a double emulsion (E2) is obtained; shearing the emulsion (E2), whereby a double emulsion (E3) is obtained; and polymerizing the composition C2, wherein solid microcapsules dispersed in the composition C3 are obtained.

Method for preparing capsules comprising at least one water-soluble or hydrophilic substance and capsules obtained therefrom

The present invention relates to a capsule preparation method for preparing solid microcapsules, comprising the following steps: a) addition, under agitation, a composition C1, comprising at least one active ingredient, to a polymeric composition C2, the compositions C1 and C2 being mutually immiscible, whereby an emulsion (E1) is obtained comprising droplets of the composition C1 dispersed in the composition C2; b) addition, under agitation, the emulsion (E1) to a composition C3, the compositions C2 and C3 being mutually immiscible, whereby a double emulsion (E2) is obtained comprising droplets dispersed in the composition C3; c) applying shear to the emulsion (E2), whereby a double emulsion (E3) is obtained comprising size controlled droplets dispersed in the composition C3; and d) polymerising the composition C2, whereby solid microcapsules dispersed in the composition C3 are obtained.

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Maisons Alfort, France

Alicia Sadaoui