Title:
CERIUM-OXIDE-COATED ZINC OXIDE PARTICLES, METHOD FOR PRODUCING SAME, ULTRAVIOLET RAY SHIELDING AGENT, AND COSMETIC
Document Type and Number:
WIPO Patent Application WO/2015/098945
Kind Code:
A1
Abstract:
[Problem] To provide zinc oxide particles which are improved in ultraviolet ray shielding performance in an UV-A wave region having a wavelength of 400 to 320 nm.
[Solution] Cerium-oxide-coated zinc oxide particles, each of which comprises a raw material zinc oxide particle that serves as a base and a cerium oxide layer that is coated and formed on the surface of the base particle, said cerium-oxide-coated zinc oxide particles being characterized in that the content ratio of cerium oxide is 5 to 30% by weight relative to 100% by weight of zinc oxide, the particle diameter of each of the cerium-oxide-coated zinc oxide particles is 0.01 μm or more, and the specific surface area of each of the cerium-oxide-coated zinc oxide particles is 5.0 m2/g or more.
Inventors:
SUEDA SATORU (JP)
HASHIMOTO MITSUO (JP)
WADA MIZUHO (JP)
HASHIMOTO MITSUO (JP)
WADA MIZUHO (JP)
Application Number:
PCT/JP2014/084115
Publication Date:
July 02, 2015
Filing Date:
December 24, 2014
Export Citation:
Assignee:
SAKAI CHEMICAL INDUSTRY CO (JP)
International Classes:
C01G9/02; A61K8/27; A61Q17/04; A61Q19/00; C09K3/00
Domestic Patent References:
| WO2013042596A1 | 2013-03-28 | |||
| WO2013035545A1 | 2013-03-14 | |||
| WO2013042596A1 | 2013-03-28 | |||
| WO2012147886A1 | 2012-11-01 | |||
| WO2012147887A1 | 2012-11-01 |
Foreign References:
| JP2007161578A | 2007-06-28 | |||
| JP2010185133A | 2010-08-26 | |||
| JPH06345427A | 1994-12-20 | |||
| JPH0222317A | 1990-01-25 | |||
| JPS62275182A | 1987-11-30 |
Other References:
See also references of EP 3088364A4
Attorney, Agent or Firm:
YAGI, Toshiyasu (JP)
Toshiyasu Yagi (JP)
Toshiyasu Yagi (JP)
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