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US 2022/0054376 A1Published application
External skin preparation
AssigneeKao Corporation
InventorsTakashi FUKUI, Noriko TEJIMA
Life of this patent
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Abstract
The present invention relates to [1] an external skin preparation containing a tabular metal oxide (A) having a thickness of 30 to 360 nm and an aspect ratio of 50 to 300, and a UV absorbent (B) in a ratio [(A)/(B)] by mass of 0.1 to 5; [2] an external skin reparation containing the tabular metal oxide (A), a UV scattering agent (C) and a nonvolatile oil (D) in a ratio [(A)/(C)] by mass of 0.1 to 18; and [3] a method for protecting skin from IR rays and UV rays by applying the external skin preparation to skin.
Claims12
1:
- An external skin preparation, comprising a tabular metal oxide (A) having a thickness of 30 nm or more and 360 nm or less and an aspect ratio of 50 or more and 300 or less, and a UV absorbent (B), wherein a ratio [(A)/(B)] by mass is 0.1 or more and 5 or less.
2:
- An external skin preparation, comprising a tabular metal oxide (A) having a thickness of 30 nm or more and 360 nm or less and an aspect ratio of 50 or more and 300 or less, a UV scattering agent (C) and a nonvolatile oil (D), wherein a ratio [(A)/(C)] by mass is 0.1 or more and 18 or less.
3:
- The external skin preparation according to claim 1, wherein the UV absorbent (B) is an oil-soluble organic UV absorbent.
4:
- The external skin preparation according to claim 2, wherein a ratio by mass [(A)/(D)] is 0.1 or more and 2 or less.
5:
- The external skin preparation according to claim 1, wherein a content of the tabular metal oxide (A) is 1% by mass or more and 35% by mass or less.
6:
- The external skin preparation according to claim 1, wherein the tabular metal oxide (A) is one or more selected from the group consisting of a tabular titanium oxide and a tabular zinc oxide.
7:
- The external skin preparation according to claim 1, which is a skin cosmetic material.
8:
- A method for protecting skin from IR rays and UV rays, the method comprising applying the external skin preparation of claim 1 to skin.
9:
- The external skin preparation according to claim 2, wherein a content of the tabular metal oxide (A) is 1% by mass or more and 35% by mass or less.
10:
- The external skin preparation according to claim 2, wherein the tabular metal oxide (A) is one or more selected from the group consisting of a tabular titanium oxide and a tabular zinc oxide.
11:
- The external skin preparation according to claim 2, which is a skin cosmetic material.
12:
- A method for protecting skin from IR rays and UV rays, the method comprising applying the external skin preparation of claim 2 to skin.