Flaky fine powder, production thereof, and cosmetic

Details Flaky fine powder, production thereof, and cosmetic Flaky fine powder, production thereof, and cosmetic

2005-08-02

2005-08-02

Jiang, Shaojia Anna (Department: 1617)

Drug, bio-affecting and body treating compositions

Preparations characterized by special physical form

Cosmetic, antiperspirant, dentifrice

C424S490000, C424S489000, C424S724000

Reexamination Certificate

active

06923974

ABSTRACT:
A flaky, fine powder comprising a flaky substance as the base and silica particles covering the surface of the base, aimed at reducing the glossiness of the base caused by the irregular reflection of light on its surface and improving the slipperiness. In particular, the powder comprises a flaky base substance such as natural mica and silica particles deposited on the base surface, wherein the silica particles may be optionally further immobilized by the hydrolysate of alkoxysilane or silica gel. The flaky fine powder is produced either by the adding alkoxysilane to a dispersion containing a flaky substance and silica particles and hydrolyzing it, by adding a silicic acid solution to the dispersion and gelling it, or by adding a combination of alkoxysilane and silicic acid solution. The powder can be compounded with various ingredients and is particularly useful with cosmetics.

REFERENCES:
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patent: 4509988 (1985-04-01), Bernhard
patent: 5407746 (1995-04-01), Prengel et al.
patent: 5478550 (1995-12-01), Suzuki et al.
patent: 6030627 (2000-02-01), Seo et al.
patent: 6309627 (2001-10-01), Golz-Berner et al.
patent: 6355260 (2002-03-01), Tanaka et al.

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