| abstract |
The present invention relates to a method for preparing solid microparticles and microcapsules, the method comprising the following steps: (a) adding while stirring a composition C'2 to a composition C3, the compositions C'2 and C3 being immiscible, the composition C'2 being either a single-phase crosslinkable composition C2 or an emulsion (E1) comprising droplets of a composition C1, comprising at least one active substance, the droplets being dispersed in a crosslinkable polymer composition C2, the compositions C1 and C2 being immiscible, the viscosity of the composition C3 being of more than 10'000 mPA.s at 25°C at a shearing speed of 10 s - n 1 and of less than 10'000 mPA.s at 25° at a shearing speed ranging from 100 s -1 to 100'000 s -1 , an emulsion (E2) being obtained in this process; (b) applying shearing forces to the emulsion (E2), the applied shearing speed being of less than 1'000 s -1 , an emulsion (E3) being obtained in this process; and (c) polymerising the composition C'2. |