Silicon oxide-coated zinc oxide, method for producing same, and composition and cosmetic including silicon oxide-coated zinc oxide
AssigneeSumitomo Osaka Cement Co., Ltd.
InventorsTetsuro Itagaki, Gaku Fujihashi, Syunsuke Suma
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Abstract
Provided are a silicon oxide-coated zinc oxide, a method for producing the same, a composition and a cosmetic including a silicon oxide-coated zinc oxide. The silicon oxide-coated zinc oxide is a silicon oxide-coated zinc oxide formed by coating surfaces of zinc oxide particles with a silicon oxide coat, in which an average particle diameter of the zinc oxide particles is in a range of more than 50 nm and 500 nm or less, and, when an abundance ratio of silicon in the silicon oxide coat in a Q3 environment is indicated by Q3, and an abundance ratio in a Q4 environment is indicated by Q4, Q3+Q4≥0.6 and Q4/(Q3+Q4)≥0.5 are satisfied.
Claims9
A silicon oxide-coated zinc oxide, comprising:
- zinc oxide particles having an average particle diameter in a range of more than 100 nm to 500 nm, and
- a silicon oxide coating on the surface of the zinc oxide particles;
- in which, when an abundance ratio of silicon in the silicon oxide coating in a Q3 environment is indicated by Q3, and an abundance ratio in a Q4 environment is indicated by Q4, Q3+Q4≥0.6 and Q4/(Q3+Q4)≥0.5.
A composition comprising:
- silicon oxide-coated zinc oxide comprising zinc oxide particles having an average particle diameter in a range of more than 100 nm to 500 nm, and a silicon oxide coating on the surface of the zinc oxide particles in which, when an abundance ratio of silicon in the silicon oxide coating in a Q3 environment is indicated by Q3, and an abundance ratio in a Q4 environment is indicated by Q4, Q3+Q4≥0.6 and Q4/(Q3+Q4)≥0.5;
- and
- a solvent.
Dependencies are inferred from the claim text.