SURFACE-TREATED POWDER AND COSMETIC COMPRISING THE SAME

摘要

The surface of a powder comprising a silicone resin and/or an organic powder is coated with a specific hydrophilic treating agent to render the powder hydrophilic. The hydrophilic treating agent comprises a water-soluble polyoxyalkylene glycol derivative, and the organic powder is at least one substance selected from PMMA, nylon, polyester, polystyrene, cellulose, silicone elastomer powder, silicone rubber powder, benzoguanamine, styrene divinylbenzene pinhole polymer, ethylene tetrafluoride, polyethylene powder, polypropylene powder, polyurethane powder, silk powder, a metal soap powder, starch powder, an N-acylated lysine, an organic pigment and the like. The coated powder is extremely excellent in dispersion property and dispersion stability in an aqueous dispersion medium, particularly an aqueous dispersion medium under acidic or alkaline conditions (e.g., at pH within the range of 3 to 13), and is therefore suitable for use in various types of cosmetics.