JP7569640B2 - Solid powder cosmetics - Google Patents

Description

The present invention relates to a solid powder cosmetic.

Since silicone elastomers are soft and elastic, it is being considered to use them as a coating for powder to improve the softness, stretchiness, and other feel of the elastomer-coated powder. (Patent Documents 1 and 2)

JP 2011-1332 A JP 2013-139400 A

However, when powders that have been surface-treated with these silicone elastomers are blended into various types of cosmetics, the tactile characteristics that have been imparted to the coated powder, such as softness, spreadability, and bare skin feel, as well as the effects of adhesion and blending, can be lost.

The inventors have discovered that by combining a silicone elastomer-coated extender pigment with a silicone elastomer, a liquid oil capable of dispersing the silicone elastomer, and a color pigment in a specific ratio, it is possible to obtain a solid powder cosmetic that can be taken in an optimal amount using a sponge or the like, spreads well on the skin when applied, feels smooth and soft to the touch, leaves no white cast after application, provides uniform coverage while retaining the bare skin feel derived from the elastomer-coated powder, and does not feel like a film on the skin.

The present invention comprises the following components (A), (B), (C) and (D):
(A) 50% by mass or more of a body pigment coated with a silicone elastomer,
(B) a silicone elastomer,
(C) a liquid oil capable of dispersing the silicone elastomer of component (B); (D) containing a color pigment;
the mass ratio (A)/(B) of component (A) to component (B) is 10 to 40;
the mass ratio (A)/(D) of the component (A) to the component (D) is 2.5 to 10;
The present invention relates to a solid powder cosmetic preparation having a total liquid oil content including component (C) of 10 to 20 mass %.

The solid powder cosmetic of the present invention can be dispensed in an optimal amount using a sponge or the like, spreads easily when applied to the skin, feels smooth and soft to the touch, does not leave a white cast after application, provides uniform coverage, and does not leave a filmy feeling such as a tight or uncomfortable sensation on the skin.

The component (A) used in the present invention is a body pigment coated with a silicone elastomer.
Examples of silicone elastomers for coating the extender pigment include crosslinked polyether-modified silicones and crosslinked polyglycerin-modified silicones.
Crosslinked polyether-modified silicone is a three-dimensional crosslinked product in which organopolysiloxane chains are crosslinked with polyether. Here, examples of polyether include polyoxyethylene and polyoxypropylene. Specific examples of crosslinked polyether-modified silicone include (dimethicone/(PEG-10/15)) crosspolymer, alkyl-co-modified (PEG-15/lauryl dimethicone) crosspolymer, (PEG-10/lauryl dimethicone) crosspolymer, and the like. Commercially available products include KSG-210, KSG-240, KSG-310, KSG-320, KSG-330, and KSG-340 (all manufactured by Shin-Etsu Chemical Co., Ltd.), which are obtained by swelling these with silicone oil, hydrocarbon oil, ester oil, or the like.

Crosslinked polyglycerin-modified silicones are three-dimensional crosslinked products in which organopolysiloxane chains are crosslinked with polyglycerin, and specific examples include (dimethicone/polyglycerin-3) crosspolymers and alkyl-co-modified (lauryl dimethicone/polyglycerin-3) crosspolymers, etc. Commercially available products include KSG-710, KSG-810, KSG-820, KSG-830, KSG-840 (all manufactured by Shin-Etsu Chemical Co., Ltd.), which are produced by swelling these with silicone oil, hydrocarbon oil, ester oil, etc.
In the present invention, the silicone elastomer used to coat the extender pigment of component (A) is preferably a crosslinked polyether-modified silicone from the standpoints of adhesion to the skin, spreadability, and smoothness and softness to the touch.

On the other hand, examples of extender pigments include those used in ordinary cosmetics, such as natural mica such as sericite (sericite), phlogopite, and muscovite, synthetic mica, talc, kaolin, plate-like barium sulfate, silicic acid, silicic anhydride, magnesium silicate, magnesium oxide, and aluminum oxide.
Among these, from the viewpoint of bulk dispersibility when producing a coated powder, natural mica such as sericite, synthetic mica, and talc are preferred, and sericite and talc are more preferred.

A method for treating the extender pigment with a silicone elastomer can be, for example, to surface-treat the extender pigment with a silicone elastomer dispersed in a dispersion medium containing water, and can be carried out, for example, according to the method described in JP 2013-139400 A.
The amount of silicone elastomer used (coating amount) is preferably 0.1 to 20 parts by mass, and more preferably 1 to 10 parts by mass, per 100 parts by mass of the body pigment, from the viewpoints of adhesion to the skin, spreadability, and smoothness and softness to the touch.

The silicone elastomer-coated body pigment of component (A) thus obtained preferably has an average particle size of 1 to 50 μm, more preferably 2 to 25 μm, and even more preferably 3 to 20 μm, from the viewpoints of adhesion to the skin and spreadability.
In the present invention, the average particle size of the powder is measured by a laser diffraction particle size distribution measuring device (Laser Micronsizer LMS-350, manufactured by Seishin Co., Ltd.).

The silicone elastomer-coated body pigment of component (A) can be used alone or in combination of two or more kinds, and from the viewpoints of spreadability when applied to the skin, smoothness and softness to the touch, and absence of white cast after application, the content is 50% by mass or more of the total composition, preferably 55% by mass or more, and more preferably 60% by mass or more, and is preferably 85% by mass or less, and more preferably 80% by mass or less.
Furthermore, when silicone elastomer-coated sericite and silicone elastomer-coated talc are contained as component (A), from the viewpoints of the ease of removal onto a sponge, the spreadability upon application, and the film feel, the mass ratio of these coated powders (coated sericite:coated talc) is preferably from 100:0 to 25:75, and more preferably from 100:0 to 50:50.

The silicone elastomer of component (B) used in the present invention is a silicone or derivative thereof having a crosslinked structure obtained by polymerization of a monomer, and is preferably, for example, a silicone or derivative thereof obtained by polymerizing or copolymerizing a monomer selected from dimethicone, vinyl dimethicone, phenyl vinyl dimethicone, lauryl dimethicone, lauryl polydimethylsiloxyethyl dimethicone, etc.
Specific examples include dimethicone/vinyl dimethicone crosspolymer, dimethicone/phenylvinyl dimethicone crosspolymer, dimethicone/lauryl dimethicone crosspolymer, etc. Commercially available products include KSG-16, KSG-18A, KSG-19, KSG-43 (all manufactured by Shin-Etsu Chemical Co., Ltd.), etc., which are obtained by swelling these with silicone oil, ester oil, etc.
In addition, (dimethicone/(PEG-10/15)) crosspolymer, (PEG-15/lauryl dimethicone) crosspolymer, (PEG-10/lauryl dimethicone) crosspolymer, (dimethicone/polyglycerin-3) crosspolymer, (lauryl dimethicone/polyglycerin-3) crosspolymer, etc., which are used as a coating material for component (A), can also be used.
Among these, from the viewpoints of the ease of attachment to a sponge, the spreadability upon application, and further the dispersibility and mixing ability of the coating material of component (A) and component (D), those having fewer branches are preferred, and (dimethicone/vinyl dimethicone) crosspolymer and (dimethicone/phenylvinyl dimethicone) crosspolymer are preferred.

The silicone elastomer of component (B) may be used alone or in combination of two or more, and the content is preferably 1.5% by mass or more, more preferably 2% by mass or more, and even more preferably 2.3% by mass or more in the total composition from the viewpoints of the ease of attachment to a sponge, smoothness and softness of the touch, absence of white cast after application, and film feel. Also, from the viewpoints of the spreadability during application and film feel after application, the content is preferably 7% by mass or less, more preferably 6.5% by mass or less, and even more preferably 6% by mass or less.
When a commercially available silicone elastomer swollen with silicone oil or the like is used as component (B), the content shown is that of the silicone elastomer alone.

In the present invention, the mass ratio (A)/(B) of component (A) to component (B) is 10 or more, preferably 11 or more, and more preferably 13 or more, from the viewpoints of the ease of attachment to a sponge, smoothness and softness to the touch, absence of white cast after application, and film feel, and is 40 or less, preferably 35 or less, and more preferably 33 or less.

Component (C) used in the present invention is a liquid oil capable of dispersing the silicone elastomer of component (B).
Here, a dispersible liquid oil is an oil agent that has a structure common to or similar to the structure of the main chain or branched portion of a silicone elastomer (crosslinked product), is capable of swelling the silicone elastomer, and is fluid at 25°C.

Examples of liquid oils capable of dispersing the silicone elastomer of component (C) include volatile and non-volatile silicone oils such as dimethylpolysiloxane, dimethylcyclopolysiloxane, methyltrimethicone, methylphenylpolysiloxane, diphenylsiloxyphenyltrimethicone, and methylhydrogenpolysiloxane; linear or branched hydrocarbon oils such as liquid paraffin, light isoparaffin, liquid isoparaffin, squalane, and squalene; and triethylhexanoin.

As component (C), silicone oil is preferred from the viewpoint of swelling the coating material of component (A) and component (B), and liquid dimethylpolysiloxane, dimethylcyclopolysiloxane, methyltrimethicone, methylphenylpolysiloxane, and diphenylsiloxyphenyltrimethicone are preferred.

The component (C) may be used alone or in combination of two or more, and the content is preferably 10% by mass or more, more preferably 11% by mass or more, based on the total composition from the viewpoints of the absence of white cast after application and the film feeling, and is preferably 20% by mass or less, more preferably 17% by mass or less, based on the viewpoints of the ease of removal onto a sponge and the ease of spreading on the skin when applied.
When a commercially available silicone elastomer swollen with silicone oil or the like is used as component (B), the content of the solvent such as silicone is included in component (C).

The solid powder cosmetic of the present invention may contain liquid oils other than component (C). In that case, the content of all liquid oils including component (C) is 10% by mass or more, preferably 11% by mass or more, and more preferably 11.5% by mass or more, of the total composition from the viewpoints of the absence of white cast after application and the feeling of film formation. Also, from the viewpoints of the ease of removal onto a sponge and the ease of spreading on the skin when applied, it is 20% by mass or less, preferably 19% by mass or less, and more preferably 18% by mass.

The coloring pigments of component (D) used in the present invention include those used in ordinary cosmetics, such as metal oxides such as titanium oxide, zinc oxide, yellow iron oxide, red iron oxide, black iron oxide, Prussian blue, ultramarine blue, chromium oxide, and chromium hydroxide; metal complexes such as manganese violet and cobalt titanate; inorganic pigments such as carbon black; synthetic organic pigments such as Red No. 3, Red No. 104, Red No. 106, Red No. 201, Red No. 202, Red No. 204, Red No. 205, Red No. 220, Red No. 226, Red No. 227, Red No. 228, Red No. 230, Red No. 401, Red No. 405, Red No. 505, Orange No. 203, Orange No. 204, Orange No. 205, Yellow No. 4, Yellow No. 5, Yellow No. 401, Blue No. 1, and Blue 404; and natural organic pigments such as β-carotene, caramel, and paprika color.
Among these, metal oxides are preferred from the viewpoint of uniform covering power.

The color pigment of component (D) may be untreated or may have been subjected to a hydrophobic treatment.
Examples of the hydrophobic treatment include silicone treatment, fluorine treatment, fatty acid treatment, etc. Examples of the silicone treatment include methylhydrogenpolysiloxane treatment, dimethylpolysiloxane treatment, alkylalkoxysilane treatment, etc. Examples of the fluorine treatment include perfluoroalkyl phosphate treatment, perfluoroalkylalkoxysilane treatment, etc. Examples of the fatty acid treatment include stearic acid treatment, myristic acid treatment, etc. Of these, silicone treatment is preferred.
The hydrophobization treatment may be carried out by a conventional method such as a dry treatment or a wet treatment.
From the viewpoint of uniform covering power, the color pigment of component (D) preferably has an average particle size of 0.001 to 1 μm, and more preferably 0.01 to 0.8 μm.

Component (D) can be used alone or in combination of two or more kinds, and from the viewpoint of uniform covering power, the content is preferably 7 mass% or more in the total composition, more preferably 7.5 mass% or more, and even more preferably 8 mass% or more. Also, from the viewpoint of the absence of white cast after application and uniform covering power, the content is preferably 20 mass% or less, more preferably 18 mass% or less, and even more preferably 17 mass% or less.

In the present invention, the mass ratio (A)/(D) of component (A) to component (D) is 2.5 or more, preferably 3 or more, and more preferably 3.5 or more, from the viewpoints of the absence of white cast after application and uniform covering power, and is 10 or less, preferably 90 or less, and more preferably 8 or less.

The solid powder cosmetic of the present invention may contain, in addition to the above-mentioned components, components used in ordinary cosmetics, such as powders other than components (A), (B), and (D), oil components other than component (C), preservatives, antioxidants, colorants, thickeners, pH adjusters, fragrances, UV absorbers, moisturizers, blood circulation promoters, cooling agents, antiperspirants, disinfectants, skin activators, etc.

In the solid powder cosmetic of the present invention, the content of components other than components (A) to (D) is preferably 10% by mass or less, more preferably 5% by mass or less, and even more preferably 1% by mass or less, from the viewpoints of how easily the component can be picked up by a sponge, how easily the component can be spread on the skin when applied, and how smooth and soft the component feels to the touch.

The solid powder cosmetic of the present invention can be produced according to a conventional method. For example, the components (A) to (D) are mixed uniformly, the resulting mixture is pulverized, passed through a sieve, and then molded to obtain a solid powder cosmetic.

The solid powder cosmetic of the present invention is suitable as a makeup cosmetic such as a powder foundation, blusher, eye shadow, etc.

Production Example 1 (Production of Silicone Elastomer-Treated Sericite):
(1) Preparation of silicone elastomer pulverized liquid;
To 100 parts by mass of a mixture of 25% by mass of (PEG-15/lauryl dimethicone) crosspolymer and 75% by mass of isododecane (KSG-320, manufactured by Shin-Etsu Chemical Co., Ltd.), 50 parts by mass of water was added as a dispersion medium, and the mixture was ground and mixed (stroke count 250 times/min, 30 minutes) using a paint shaker (YS-LD, manufactured by Yayoi Co., Ltd.) to obtain a ground product liquid.
(2) Preparation of powder slurry;
100 parts by mass of sericite was added with 100 parts by mass of water, and the mixture was thoroughly mixed with a disperser to obtain a slurry.
(3) Mixing and drying;
200 parts by weight of the powder slurry was added to 30 parts by weight of the ground product liquid and mixed using a disperser, and then the mixture was dried by heating at 100° C. for 24 hours to obtain silicone elastomer-treated mica.
(In the treated powder, the amount of silicone elastomer coated per 100 parts by mass of powder is 5 parts by mass.)

Production Example 2 (Production of silicone elastomer-treated talc):
Production Example 1 (2) In preparing the powder slurry, sericite was replaced with 100 parts by mass of talc and 150 parts by mass of water, and (3) in mixing and drying, the amount of the ground liquid was changed to 18 parts by mass. In the same manner as in Production Example 1, a silicone elastomer-treated talc was obtained.
(In the treated powder, the amount of silicone elastomer coated per 100 parts by weight of powder is 3 parts by weight.)

Examples 1 to 16, Comparative Examples 1 to 8
Solid powder cosmetics (powder foundations) having the compositions shown in Tables 1 and 2 were produced and evaluated for the degree of adhesion to a sponge, the spreadability upon application, the smoothness and softness of the feel, the absence of white cast after application, the uniform coverage, and the film feel after application (feeling of tightness on the skin, discomfort). The results are shown in Tables 1 and 2.

(Production method)
Components (A) and (D) were put into a Henschel mixer and mixed uniformly, and then components (B), (C) and other components were added and mixed until further uniform. The resulting mixture was pulverized in an atomizer, passed through a sieve, and molded into a metal dish to obtain a powder foundation.

(Evaluation Method)
A specialist evaluator applied each solid powder cosmetic (powder foundation) to the skin with a sponge and performed a sensory evaluation of the following criteria: how well it was absorbed into the sponge, how it spread when applied, how smooth and soft it felt to the touch, the lack of any white cast, the uniform feeling of coverage, and the feeling of film after application.

(1) Ability to adhere to sponge:
5: Absorbs very well onto sponge.
4: Absorbs easily onto sponge.
3: Adheres fairly easily to sponges.
2: It doesn't adhere well to the sponge.
1: It does not adhere well to the sponge.

(2) Spreadability upon application:
5: Spreads very well when applied.
4: Spreads well when applied.
3: Spreads fairly well when applied.
2: The spreadability when applied is not very good.
1: The coating does not spread well when applied.

(3) Smoothness and softness of the feel:
5: Very smooth and soft to the touch.
4: Smooth and soft to the touch.
3: Feels somewhat smooth and soft.
2: Almost no smoothness or softness to the touch.
1: It does not feel smooth or soft.

(4) No white cast:
5: No white cast at all.
4: Almost no white cast.
3: No white cast.
2: There is a slight whitish cast.
1: There is a whitish cast.

(5) Uniform coverage:
5: Very even coverage.
4: Even coverage.
3: Fairly even coverage.
2: Coverage is not very even.
1: Not evenly covered.

(6) Film feeling after application (tightness on skin, discomfort):
5: No filmy feeling at all.
4: Almost no filmy feeling.
3: No filmy feeling.
2: There is a slight filmy feeling.
1: Has a filmy feel.

*1: TAROX synthetic iron oxide R-516P (Titanium Industries Co., Ltd.),
*2: TAROX synthetic iron oxide LL-100P (Titanium Industries Co., Ltd.),
*3: TAROX synthetic iron oxide BL-100P (Titanium Industries Co., Ltd.),
* 4: MP-701 average particle size 0.27 μm (Teika Co., Ltd.),
* 5: MT-500SA average primary particle diameter 0.035 μm (Teika Co., Ltd.),
*6: Titanium oxide *4 treated with 2% dimethicone by mass.
*7: The fine titanium dioxide particles of *5 are treated with 3% by mass of hydrogen dimethicone.
*8: Titanium oxide CR-50 average particle size 0.25 μm (Ishihara Sangyo Kaisha),
*9: KSG-16 (dimethicone/vinyl dimethicone) con crosspolymer/KF-96A-6CS=25/75 (Shin-Etsu Chemical Co., Ltd.),
*10: KSG-18A (dimethicone/phenylvinyldimethicone) cone crosspolymer/diphenylsiloxyphenyl trimethicone=15/85 (Shin-Etsu Chemical Co., Ltd.),
*11: KSG-43 (dimethicone/lauryl dimethicone) corn crosspolymer/trimethylhexanoin=30/70 (Shin-Etsu Chemical Co., Ltd.),
*12: NIKKOL Refined Olive Squalane (Nikko Chemicals)

Claims (4)

The following components (A), (B), (C) and (D):
(A) 50% by mass or more and 80% by mass or less of sericite or talc coated with a crosslinked polyether-modified silicone ,
(B) 1.5% by mass or more and 7% by mass or less of a silicone elastomer selected from (dimethicone/vinyl dimethicone) crosspolymer, (dimethicone/phenyl vinyl dimethicone) crosspolymer, and (dimethicone/lauryl dimethicone) crosspolymer,
(C) 10% by mass or more and 20% by mass or less of a liquid oil capable of dispersing the silicone elastomer of component (B) , which is selected from silicone oil, linear or branched hydrocarbon oil, and triethylhexanoin;
(D) Metal oxide color pigment: 7% by mass or more and 20% by mass or less
Contains
the mass ratio (A)/(B) of component (A) to component (B) is 10 to 40;
the mass ratio (A)/(D) of the component (A) to the component (D) is 2.5 to 10;
A solid powder cosmetic preparation having a total liquid oil content including component (C) of 10 to 20 mass%. 2. The solid powder cosmetic preparation according to claim 1 , wherein the content of components other than the components (A) to (D) is 10% by mass or less. 3. The solid powder cosmetic preparation according to claim 1 , wherein in component (A), the amount of the silicone elastomer coated is 0.1 to 20 parts by mass per 100 parts by mass of sericite or talc . The solid powder cosmetic preparation according to any one of claims 1 to 3 , wherein component (C) contains a silicone oil.