Device and method for continuously producing emulsions or dispersions
A device for continuously producing emulsions or dispersions while excluding air comprises a mixing vessel, which is closed on all sides and which has supply tubes and discharge tubes for introducing and discharging fluid substances or compositions, and also an impeller, which permits an agitating input into the emulsion or dispersion without generating cavitation forces and without high-pressure homogenization. For preparing the cosmetic emulsions of the invention, as well, emulsifiers are generally used.
1. A method for continuously producing emulsions and dispersions while excluding air, in which at least two fluid streams of at least two phases of the emulsions or dispersions are metered separately and continuously into a mixing vessel which is closed on all sides, and in which they are converted, with agitated input, into an emulsion or dispersion, and the emulsion/dispersion is discharged continuously from the mixing vessel, the agitated input taking place without generating cavitation forces and without high-pressure homogenization, and wherein the at least two fluid streams are metered in a proportion effective to provide a viscoelastic range of the mixture in the mixing vessel.
2. The method of claim 1 , wherein the emulsion or dispersion discharged from the mixing vessel and a further fluid stream are metered into a second mixing vessel, which is closed on all sides and from which the desired emulsion or dispersion is discharged.
3. The method of claim 1 , wherein the method is used for producing nanoemulsions, nanodispersions or SLN dispersions.