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Title:
DISPERSION OF FINE TITANIUM OXIDE PARTICLES AND COSMETIC PREPARATION CONTAINING THE SAME
Document Type and Number:
WIPO Patent Application WO/2007/069430
Kind Code:
A1
Abstract:
A dispersion of fine titanium oxide particles which can give a transparent, natural finish feeling, has an excellent ultraviolet screening effect in both of the UVA and UVB regions, and has satisfactory long-term stability. The dispersion of fine titanium oxide particles is characterized by comprising fine titanium oxide particles having an average major-axis length of 30-100 nm and an average minor-axis length of 8-50 nm and a hydrophobic dispersion medium in which the particles are dispersed so as to have an average dispersed-particle diameter of 80-110 nm. In the dispersion of fine titanium oxide particles, the hydrophobic dispersion medium preferably comprises a silicone oil in an amount of 10-100 mass% based on the whole dispersion medium. The dispersion of fine titanium oxide particles preferably further contains a polyglycerol having a silicone group at each end as a dispersant. The dispersion of fine titanium oxide particles is suitable for use in cosmetic preparations.

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Inventors:
NASU AKIO (JP)
Application Number:
PCT/JP2006/323079
Publication Date:
June 21, 2007
Filing Date:
November 20, 2006
Export Citation:
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Assignee:
SHISEIDO CO LTD (JP)
NASU AKIO (JP)
International Classes:
A61K8/29; A61K8/891; A61K8/894; A61Q17/04
Domestic Patent References:
WO1997045097A11997-12-04
WO2002000797A12002-01-03
WO2006075679A12006-07-20
Foreign References:
JPS647941A1989-01-11
JP2004035632A2004-02-05
JPH11116454A1999-04-27
JP2005154736A2005-06-16
JP2006131547A2006-05-25
JP2007022972A2007-02-01
JPH09208438A1997-08-12
JP2002080771A2002-03-19
JP2004002887A2004-01-08
JP2004035632A2004-02-05
Other References:
See also references of EP 1974717A4
Attorney, Agent or Firm:
IWAHASHI, Yuji (Kanagawa Kanagawa-k, Yokohama-shi Kanagawa 45, JP)
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