Zinc oxide which is coated with silicon oxide, method for manufacturing the same, composition which includes the zinc oxide coated with silicon oxide, and cosmetic

Patent metadata

Field	Value
Publication number	US-9855197-B2
Application number	US-201415035620-A
Country	US
Kind code	B2
Filing date	Nov 13, 2014
Priority date	Nov 13, 2013
Publication date	Jan 2, 2018
Grant date	Jan 2, 2018

Abstract

Zinc oxide coated with silicon oxide of the present invention is zinc oxide which is coated with silicon oxide wherein surfaces of zinc oxide particles are coated with silicon oxide coatings, and the coated zinc oxide particles comprises at least one element selected from a group consisting of Mg, Ca, and Ba.

First claim

The invention claimed is:

1. Zinc oxide which is coated with silicon oxide, wherein
the surfaces of zinc oxide particles are coated with silicon oxide coatings, and the coated zinc oxide particles comprise at least one element selected from the group consisting of Mg, Ca, and Ba;
wherein, when an abundance ratio of silicon included in the silicon oxide coatings in a Q 3 environment is denoted by Q 3 , and the abundance ratio of silicon included in the silicon oxide coatings in a Q 4 environment is denoted by Q 4 , the abundance ratios satisfy Q 3 +Q 4 ≧0.6 and Q 4 /(Q 3 +Q 4 )≧0.5, and
a decomposition rate of Brilliant Blue generated by a photocatalytic activity of the coated zinc oxide particles is 3% or less.

2. The zinc oxide which is coated with silicon oxide according to claim 1 , wherein the silicon oxide coatings include said at least one element selected from a group consisting of Mg, Ca, and Ba, further comprises an alkali metal, and a total mass percentage of the element included in the silicon oxide coating is greater than a mass percentage of an alkali metal included in the silicon oxide coatings.

3. The zinc oxide which is coated with silicon oxide according to claim 2 , wherein the sum total of the mass percentages of the alkali metals is 0.8% by mass or less.

4. A composition which includes zinc oxide coated with silicon oxide, wherein the composition comprises the zinc oxide which is coated with silicon-oxide according to claim 1 .

5. A cosmetic comprising:
the zinc oxide which is coated with silicon oxide according to claim 1 in a cosmetic base material thereof.

6. The zinc oxide which is coated with silicon oxide according to claim 1 ,
wherein the silicon oxide coatings include said at least one element selected from a group consisting of Mg, Ca, and Ba, and a total mass percentage of the element included in the silicon oxide coating is 0.01% to 1% by mass.

7. The zinc oxide which is coated with silicon oxide according to claim 1 ,
wherein the average particle diameter of the zinc oxide is 2 nm to 500 nm.

8. The zinc oxide which is coated with silicon-oxide according to claim 2 ,
wherein the ratio of the mass percentage of the alkali metal included in the silicon oxide coatings to the total mass percentage of said at least one element selected from the group consisting of Mg, Ca, and Ba included in the silicon oxide coatings is 0.001 to 0.6.

Assignees

• Sumitomo Osaka Cement Co Ltd

Inventors

• Itagaki Tetsuro
• SUMA Syunsuke
• Fujihashi Gaku

Classifications

• A61K8/0241 Primary

  Containing particulates characterized by their shape and/or structure (see also A61K8/04, A61K8/11, and A61K8/14, further aspects are classified in A61K2800/40 and subcodes) · CPC title

• A61Q1/06

  Lipsticks · CPC title

• A61K2800/413

  Nanosized, i.e. having sizes below 100 nm · CPC title

• A61Q1/12

  Face or body powders for grooming, adorning or absorbing · CPC title

• A61Q1/08

  for cheeks, e.g. rouge · CPC title