Oil-in-water type emulsion solid cosmetic

Patent metadata

Field	Value
Publication number	US-2020315929-A1
Application number	US-201816758020-A
Country	US
Kind code	A1
Filing date	Oct 30, 2018
Priority date	Oct 31, 2017
Publication date	Oct 8, 2020
Grant date	—

Abstract

An oil-in-water type emulsion solid cosmetic that causes “adhesion” similar to that of a water-in-oil type emulsion solid cosmetic including wax, while having freshness and a moisturizing effect of an oil-in-water type emulsion substance. An oil-in-water type emulsion solid cosmetic contains (A) at least one hydrophilic thickening agent selected from the group consisting of gellan gum, agar, and copolymers including 2-acrylamide-2-methyl propane sulfonic acid, (B) a higher alcohol, (C) a surfactant, (D) water, and (E) an oil component, wherein the ratio between the blending amount of the (A) hydrophilic thickening agent and the total blending amount of the (B) higher alcohol and the (C) surfactant falls within the range of 3:1-1:9.

First claim

1 . An oil-in-water emulsion solid cosmetic, comprising:
(A) at least one hydrophilic thickener selected from a group consisting of a gellan gum, an agar and a copolymer of 2-acrylamido-2-methylpropanesulfonic acid; (B) a higher alcohol; (C) a surfactant; (D) water; and (E) an oil; wherein a ratio between a content of hydrophilic thickener (A) and a total content of said higher alcohol (B) and surfactant (C) is within a range of 3:1 to 1:9.

2 . The cosmetic, according to claim 1 , wherein:
a total content of said hydrophilic thickener (A), said higher alcohol (B) and said surfactant (C) is within a range of 2.0 to 7.5% by mass.

3 . The cosmetic, according to claim 1 , wherein:
hydrophilic thickener (A) comprises a gellan gum.

4 . The cosmetic, according to claim 1 , wherein:
copolymer of 2-acrylamido-2-methylpropanesulfonic acid is a copolymer that is a cross-linked type N,N-dimethylacrylamide-2-acrylamido-2-methylpropanesulfonic acid (salt) copolymer.

5 . The cosmetic, according to claim 1 , wherein:
said surfactant (C) comprises at least one member selected from a group consisting of a nonionic surfactant, an anionic surfactant, a cationic surfactant and an amphoteric surfactant.

6 . The cosmetic, according to claim 1 , wherein:
said surfactant (C) comprises a nonionic surfactant having an HLB value of at least 10.

7 . The cosmetic, according to claim 1 , further comprising:
a hydrophobic powder dispersed in an inner oil phase thereof.

8 . The cosmetic, according to claim 1 , further comprising:
a hydrophilic powder dispersed in an outer water phase thereof.

9 . The cosmetic, according to claim 1 , wherein:
said cosmetic is a skin care cosmetic, a sunscreen or a makeup cosmetic.

Assignees

• Shiseido Co Ltd

Inventors

• Kubota Shun

Classifications

• A61Q1/02

  Preparations containing skin colorants, e.g. pigments (preparations in powder form A61Q1/12) · CPC title

• A61K8/86

  Polyethers · CPC title

• A61K8/8158

  Homopolymers or copolymers of amides or imides, e.g. (meth) acrylamide; Compositions of derivatives of such polymers · CPC title

• A61K8/342 Primary

  Alcohols having more than seven atoms in an unbroken chain · CPC title

• A61K8/31

  Hydrocarbons · CPC title