CN-121987527-A - Cosmetic base, cosmetic containing the same, and method for producing cosmetic base

Abstract

The present invention addresses the problem of providing a novel cosmetic base agent which can improve pore-correcting effects compared with conventional cosmetic base agents even when pigment particles of the same level or less than conventional ones are used. The solution is that (A) water-soluble copolymer based on acryl dimethyl taurine, (B) at least 1 of humectant and water, and (C) pigment particles with surface subjected to hydrophobization are contained in an oily medium.

Inventors

• Choishi EMI

Assignees

• 株式会社资生堂

Dates

Publication Date

20260508

Application Date

20251024

Priority Date

20241108

Claims (13)

1. 1. A cosmetic base comprising the following components (A) - (C) in an oily medium, (A) Water-soluble copolymer based on acryl dimethyl taurines, (B) At least 1 of humectant and water, and (C) Pigment particles whose surfaces are subjected to a hydrophobization treatment.
2. 2. The cosmetic base according to claim 1, wherein the component (B) comprises the humectant, and At least a part of the component (A) and at least a part of the component (B) become a blend.
3. 3. The cosmetic base according to claim 1, wherein the content of the component (a) is 0.1 to 3.0 mass%.
4. 4. The cosmetic base according to claim 1, wherein the content of the component (B) is 0.1 to 50% by mass.
5. 5. The cosmetic base according to claim 1, wherein the component (B) is 6.0 to 120 parts by mass relative to 1.0 part by mass of the component (a).
6. 6. The cosmetic base according to claim 1, which has a viscosity of 10000 mPa-s or less at 30 ℃.
7. 7. The cosmetic base according to claim 1, wherein the component (a) comprises at least one selected from the group consisting of (acryl-dimethyl taurate ammonium/behenyl alcohol polyether-25 methacrylate) cross-linked polymer, (acryl-dimethyl taurate ammonium/VP) copolymer, (dimethylacrylamide/acryl-dimethyl taurate Na) cross-linked polymer, (acryl-Na/acryl-dimethyl taurate Na) copolymer and (acryl-hydroxy ethyl ester/acryl-dimethyl taurate Na) copolymer.
8. 8. The cosmetic base according to claim 1, wherein the component (B) contains at least one selected from the group consisting of glycerin, dipropylene glycol, and diglycerin.
9. 9. The cosmetic base according to claim 1, wherein the pigment particles comprise at least one selected from titanium oxide, zinc oxide, and iron oxide.
10. 10. The cosmetic base according to claim 1, further comprising (D) silica particles whose surfaces are subjected to hydrophobization treatment in the oily medium.
11. 11. The cosmetic base according to claim 1, which is a cosmetic base for pore correction and/or pore moisturizing.
12. 12. A water-in-oil emulsified cosmetic comprising the cosmetic base according to any one of claims 1 to 11.
13. 13. The method for producing a cosmetic base according to any one of claims 1 to 11, comprising: Blending the component (A) with the component (B) to obtain a blend, and Dispersing the blend in the oily medium.

Description

Cosmetic base, cosmetic containing the same, and method for producing cosmetic base Technical Field The present invention relates to cosmetic bases. The present invention also relates to a cosmetic in which the cosmetic base of the present invention is blended, and a method for producing the cosmetic base of the present invention. Background In recent years, cosmetic materials have paid attention to functions such as protecting skin and maintaining the appearance of skin beautiful. Along with this, in response to various demands of consumers, various cosmetics or cosmetic bases have been developed so far. For example, patent document 1 discloses a method for producing an oil-in-water type emulsified cosmetic composition, which contains a particulate metal oxide to such an extent that an ultraviolet ray protection effect can be obtained, contains a large amount of an oily component, and reduces the content of an emulsifier, and an oil-in-water type emulsified cosmetic composition produced by the method. More specifically, the method for producing a cosmetic of patent document 1 is a method for producing an oil-in-water emulsion cosmetic comprising the step of adding an aqueous phase containing a hydrophilic emulsifier to an oil phase containing a fine particulate metal oxide subjected to a hydrophobization surface treatment, a lipophilic emulsifier, a sodium acrylate/sodium acryloyldimethyl taurate copolymer and a liquid oil, and performing phase inversion emulsification to obtain the oil-in-water emulsion cosmetic. The cosmetic of patent document 1 thus produced is an oil-in-water emulsion cosmetic comprising a fine particulate metal oxide subjected to a hydrophobization surface treatment, a lipophilic emulsifier, a sodium acrylate/sodium acryloyldimethyl taurate copolymer, a liquid oil, and a phase inversion emulsion of a hydrophilic emulsifier. Prior art literature Patent literature Patent document 1 Japanese patent application laid-open No. 2021-017426 Disclosure of Invention Problems to be solved by the invention Among the heretofore known bases for cosmetic materials for correcting or concealing pores, a component for making irregularities on the skin surface inconspicuous and providing a smooth texture is mainly used. More specifically, pigment particles that physically fill pores and conceal pores by color development are blended in such a pore-correcting cosmetic base. However, pigment particles may be used to make pores more attractive depending on the color of the skin, or pigment may be attached to sites other than pores to make them white, and thus the appearance of the skin may not be natural. Therefore, the cosmetic base having the pore-correcting effect or the cosmetic containing the cosmetic base still has room for improvement. The present invention has been made to solve the above problems, and an object of the present invention is to provide a novel cosmetic base which can improve pore-correcting effects as compared with the conventional one even when pigment particles of the same extent as or smaller than the conventional one are used. The invention also provides a cosmetic which is mixed with the novel cosmetic base and a method for manufacturing the novel cosmetic base. Means for solving the problems The present invention for achieving the above object is as follows. Scheme 1 A cosmetic base comprising the following components (A) - (C) in an oily medium (A) Water-soluble copolymer based on acryl dimethyl taurines, (B) At least 1 of humectant and water, and (C) Pigment particles whose surfaces are subjected to a hydrophobization treatment. Scheme 2 The cosmetic base according to scheme 1, wherein the component (B) comprises the humectant, and At least a part of the component (A) and at least a part of the component (B) form a blend. Scheme 3 The cosmetic base according to claim 1 or 2, wherein the content of the component (A) is 0.1 to 3.0% by mass. Scheme 4 The cosmetic base according to any one of the aspects 1 to 3, wherein the content of the component (B) is 1.0 to 50% by mass. Scheme 5 The cosmetic base according to any one of the aspects 1 to 4, wherein the component (B) is 6.0 to 60 parts by mass based on 1.0 part by mass of the component (A). Scheme 6 The cosmetic base according to any one of the aspects 1 to 5, wherein the viscosity at 30 ℃ is 10000 mPas or less. Scheme 7 The cosmetic base according to any one of aspects 1 to 6, wherein the component (A) comprises at least one selected from the group consisting of (ammonium acryloyldimethyl taurate/beheneth-25 methacrylate) crosslinked polymer, (ammonium acryloyldimethyl taurate/VP) copolymer, (dimethylacrylamide/Na acryloyldimethyl taurate) crosslinked polymer, (Na acrylate/Na acryloyldimethyl taurate) copolymer and (hydroxyethyl acrylate/Na acryloyldimethyl taurate) copolymer. Scheme 8 The cosmetic base according to any one of aspects 1 to 7, wherein the component (B) contains at least one selected from the group consisting o