| 主权项 |
1. A process for producing an aqueous suspoemulsion comprising a water phase, a liquid organic monomer phase dispersed in and emulsified in the water phase, and nanoparticles of a substance S which is insoluble in the monomers and the water phase, said nanoparticles being dispersed essentially in the monomer phase, said process comprising the following steps:
i) providing a suspension of the substance S which is insoluble in the monomers and the water phase in the monomer phase, said provision of the suspension comprising the following steps:
a) providing a first water-in-oil emulsion (1) in which the aqueous phase comprises a substance (S1) in dissolved form which can be converted to the substance S by means of a substance (S2), and in which the oil phase consists essentially of monomers of the monomer phase;b) providing a second water-in-oil emulsion (2) in which the aqueous phase comprises the substance (S2) in dissolved form, and in which the oil phase consists essentially of monomers of the monomer phase;c) mixing the first water-in-oil emulsion (1) with the second water-in-oil emulsion (2) and homogenizing the mixture and optionally azeotropically removing the water to obtain the suspension; ii) emulsifying the suspension provided in step i) in the water phase by mixing the suspension provided in step i) with the water phase in a mixing chamber, wherein, in step ii), the water phase is supplied at a first pressure p1 through a dispersing nozzle to the mixing chamber, which is arranged immediately beyond the dispersing nozzle, and at the same time, the suspension provided in step i) is supplied to the mixing chamber at a second pressure p2<p1, and at a distance beyond the dispersing nozzle, wherein p1 is in the range from 50 to 2000 bar, p2 is not more than 10 bar, and in step ii) the suspension is supplied to the mixing chamber at an angle in the range from 30 to 150° relative to the exit direction of the dispersing nozzle. |
