Deposition of cosmetically functional material onto pigments and fillers
AssigneeMerck Patent Gesellschaft
InventorsAngelika Thurn-Muller, Jane Hollenberg, Ian Scott
Life of this patent
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Abstract
A process for coating the surface of pigment and filler particles with an oleaginous and cosmetically functional material, characterized in that an aqueous suspension of the pigment or filler is mixed with an emulsion of said oleaginous material to be coated onto the surface of pigment or filler particles, followed by adding a component capable of breaking the emulsion to the thus obtained mixture, whereby the emulsified material coalesces onto the surface of the pigment or filler particles. The thus obtained pigments or fillers exhibit excellent properties when used in cosmetics.
Claims12
A process for coating the surface of a pigment or filler particle with an oleaginous material, comprising mixing an aqueous suspension of the pigment or filler with an emulsion of water-insoluble oleaginous material and adding a component capable of breaking the emulsion to the thus obtained mixture, whereby the emulsion is broken and the emulsified material coalesces onto the surface of the pigment or filler particles.
Dependencies are inferred from the claim text.