Cosmetics
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United States of America Patent
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N/A
Issued Date -
Aug 4, 2005
app pub date -
Jan 25, 2005
filing date -
Jan 29, 2004
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A surface of particles of at least one powder selected from PMMA, nylon, polystyrene, a silicone elastomer powder, benzoguanamine, a styrenedivinylbenzene pinhole polymer, ethylene tetrafluoride, a polyethylene powder, a polyurethane powder, a silk powder, an organic pigment and a composite of at least one of these and a metal oxide and/or a metal hydroxide is treated with a low-molecular organosilicon derivative, with or without a water-soluble cationic polymer to improve the hydrophilicity of the powder. The thus-treated powder is quite excellent in dispersibility (readily dispersible) in an aqueous dispersion medium, especially an aqueous dispersion medium in acidic and alkaline conditions, specifically with pH from 3 to 13 and in dispersion stability. The use of the surface-treated powder provides a dispersion, preferably dispersion for cosmetic, excellent in dispersibility and dispersion stability and the like. The use of the surface-treated powder, or the use of the dispersion provides further a cosmetic excellent in dispersibility and dispersion stability and further in re-dispersibility and dispersion stability with lapse of time when selecting aqueous cosmetic as an agent form.
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