abstract |
The present invention relates to a method for preparing solid microcapsules, comprising the following steps: a) adding, under agitation, a composition C1, comprising at least one active agent, to a polymeric composition C2, the compositions C1 and C2 being mutually immiscible, whereby an emulsion (E1) is obtained comprising droplets of composition C1 dispersed in the composition C2; b) adding, 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 controlled-size droplets dispersed in the composition C3; and d) polymerising the composition C2, whereby solid microcapsules dispersed in the composition C3 are obtained. |