| abstract |
In principle, a substance which is insoluble in a cosmetic or dermatological anhydrous preparation is converted by absorption on a carrier into a powdery product which is soluble in the preparation. The anhydrous preparations comprise one or more liquid at room temperature, pasty and / or up to a temperature of 150 ° C fusible hydrophilic substances or mixtures which are absorbed on one or more particulate carriers. The hydrophilic substance or the substance mixture alone is not soluble or sparingly soluble in the preparation and the carriers are characterized by a particle size in the range of 5 nm to 2 mm, a tamped density of 50 kg / m 3 to 1400 kg / m 3 and a spherical, fibrous, flaky and / or sponge-like particle shape. |