JP5485778B2 - Water-in-oil emulsified cosmetic - Google Patents

Description

  The present invention relates to a water-in-oil type emulsified cosmetic containing Gunjo.

Conventionally, coloring pigments are blended in cosmetics to color the skin. The coloring pigments mainly include natural products such as carmine, organic tar dyes such as red 226, and inorganic pigments such as iron oxide (Patent Document 1). For natural products, stable supply of raw materials and stabilization of quality are difficult, and for organic tar pigments, sensitization to skin has been reported (Patent Document 2). On the other hand, although there is no problem with respect to the stable supply and the safety of materials for inorganic pigments, the types of colors are limited, and it has been difficult to vividly color cosmetics.
From such a background, a compound (Patent Document 3) in which an organic tar pigment is coated with an inorganic powder has been proposed.
Gunjo is an inorganic powder with good safety and no problem in safety, but has a problem of discoloration and lowering the viscosity of the water-in-oil emulsified cosmetic over time. As a technique for stabilizing Gunjo, it is known to blend a divalent metal salt (Patent Document 4). However, further stabilization has been desired.

Japanese Patent No. 2902843 Japanese Patent No. 2758496 JP 2001-234090 A JP 2008-222586 A

  An object of the present invention is to provide a water-in-oil emulsified cosmetic having excellent temporal stability with respect to discoloration and viscosity change, using Gunjo, an inorganic pigment that exhibits a bright color from pink to blue.

The main configuration of the present invention is as follows.
1. A water-in-oil emulsified cosmetic comprising (A) one or more amino acids selected from histidine or lysine and (B) Gunjou.
2. 1. The chemical formula of Gunjo as the component (B) is Na _X Al ₆ Si ₆ O ₂₄ S ₄ (x = 6 to 8). The water-in-oil emulsified cosmetic described in 1.
3. 1. The component (B) Gunjou has been surface-treated with silicones. Or 2. The water-in-oil emulsified cosmetic described in 1.
4). The said component (A) is 0.05-5 mass% in the whole water-in-oil type emulsified cosmetics. ~ 3. The water-in-oil emulsified cosmetic according to any one of the above.
5. 1. It does not contain an organic tar dye. ~ 4. The water-in-oil emulsified cosmetic according to any one of the above.

A water-in-oil emulsified cosmetic having excellent temporal stability with respect to discoloration and viscosity change can be provided by incorporating Gunjo which exhibits a bright pink to blue color despite being an inorganic pigment.
A water-in-oil emulsified cosmetic with a vivid color can be provided without using an organic tar-based pigment that may cause skin sensitization.

Component (A) The basic amino acid used in the present invention includes histidine, arginine, lysine and the like, and histidine is particularly preferable.
Histidine is α-amino-β-imidazolpropionic acid, a compound having a molecular weight of 155.16 and a composition formula of C ₆ H ₉ N ₃ O ₂ .
Arginine is a compound having a molecular weight of 174.20, a composition formula of C ₆ H ₁₄ N ₄ O ₂ , and a formula of H ₂ NC (═NH) NHCH ₂ CH ₂ CH ₂ CH (COOH) NH ₂ .
Lysine is a compound having a molecular weight of 146.19 and a composition formula of C ₆ H ₁₄ N ₂ O ₂ corresponding to 2,6-diaminohexanoic acid.
Histidine, arginine, and lysine are general amino acids, and any of them can be obtained as a reagent or a cosmetic raw material.
The compounding amount of the basic amino acid in the present invention is preferably 0.05 to 5% by mass. If it is less than 0.05% by mass, the stability may not be sufficient, and even if it exceeds 5% by mass, the effect of stability does not change much.

About component (B) Gunjo is defined as a cosmetic raw material “complex sodium aluminum silicate silicate, which exhibits various colors depending on the composition”.
Examples of Gunjo used in the present invention include a chemical formula, NaxAl ₆ Si ₆ O ₂₄ S ₄ (x is 6 to 8), and a chemical formula, Na ₇ Al ₆ Si ₆ O ₂₄ S ₄ (for example, UNIPURE PINK LC589: Daito Kasei Kogyo Co., Ltd., etc.), chemical formula, Gunjo which is Na ₆ Al ₆ Si ₆ O ₂₄ S ₄ (for example, ultramarine CB-80: Daiichi Kasei Kogyo Co., Ltd., Daiichi Pink DP-3: Daiichi Kasei Kogyo Co., Ltd., etc.) can be used.

  As these Gunjo, it is preferable to use Gunjou surface-treated with silicones. Silicones are not particularly limited as the surface treatment agent, and examples thereof include dimethicone and methicone. The surface treatment method for Gunjo is not particularly limited, and examples thereof include a dry method, a spray dry method, and a wet method. In the dry method, the powder and the treatment agent are mixed in a dry state and then baked. The spray drying method is a method in which a treating agent is dissolved in a solvent, mixed and dispersed with powder, and sprayed into a hot air. The wet method is a method in which a treating agent is dissolved in a solvent, mixed and dispersed with a powder, and dried. The surface-treated Gunjo can be obtained from the above-mentioned companies.

  For the water-in-oil emulsified cosmetic of the present invention, extender pigments, organic powders, pearl agents, inorganic pigments and the like can be used. For example, talc, mica, kaolin, silica, nylon powder, polyethylene powder, styrene powder, silk powder, crystalline cellulose, starch, octenyl succinate corn starch ester aluminum, mica titanium, titanium oxide, iron oxide mica titanium, zinc oxide, etc. It is done.

  In the water-in-oil emulsified cosmetic of the present invention, a polyhydric alcohol can be further used, such as polyethylene glycol, 1,2-pentanediol, 1,3-butylene glycol, propylene glycol, glycerin, diglycerin and the like. Can be illustrated.

Moreover, the oil agent normally used for cosmetics, such as silicone oil, hydrocarbon oil, ester oil, wax, animal and vegetable oil, can be used for the water-in-oil emulsified cosmetic of the present invention. Examples of the silicone oil include dimethicone, cyclic silicone, volatile silicone, polyether-modified silicone, polyglycerin-modified silicone, amino-modified silicone, methylphenyl silicone, trimethylsiloxysilicic acid, silicone gel, and acrylic silicone.
Furthermore, a nonionic surfactant, a cationic surfactant, an anionic surfactant, an amphoteric surfactant, etc. can be used as a surfactant in the water-in-oil emulsion cosmetic of the present invention.

In the water-in-oil emulsified cosmetic of the present invention, components usually used in cosmetics, for example, antioxidants, ultraviolet absorbers, humectants, fragrances, and fragrances, as long as the effects of the invention are not impaired. Preservatives, thickeners, pH adjusters, blood circulation promoters, cooling agents, antiperspirants, fungicides, skin activators, other cosmetic ingredients, medicinal ingredients, and the like can be blended.
The present invention provides a cosmetic that exhibits a bright color from pink to blue, which contains Gunjo, which is an inorganic pigment having excellent safety. And this invention mix | blends Gunjo which is safe with respect to skin, and exhibits the vivid color of pink to blue, without using the organic tar type | system | group pigment | dye to which safety | security is a concern, and it is time-dependent about discoloration and a viscosity change. A water-in-oil emulsified cosmetic having excellent stability can be provided.

  Examples of the cosmetic of the present invention include makeup base, liquid eye shadow, cream eye shadow, liquid cheek color, cream cheek color, mascara, liquid eyeliner, lipstick, lip gloss and the like.

A water-in-oil emulsified cosmetic using the present invention was prepared, and a colorimetry test, a viscosity measurement test and an actual use test were conducted.
[Visual evaluation of color]
Using a product stored in a 5 ° C. constant-temperature bath with almost no discoloration as a standard, the color was visually evaluated according to the following criteria for samples that had been stored in a 50 ° C. constant-temperature bath for 3 months.
○: The pink color is maintained.
Δ: Pink color is slightly maintained, but bluish.
X: The color of pink is hardly felt and it is a strong bluish color.
[Color measurement test]
Immediately after preparing the sample, the color is measured with a spectral color difference meter to obtain an initial value. Measure the color with a spectrocolorimeter after 3 months in a 50 ° C. thermostatic chamber after sample preparation. It was evaluated that the smaller the color difference (Δa ^* and Δb ^* ) between the initial value and the colorimetric value after one month, the smaller the color change. The evaluation criteria for discoloration are shown below.
Evaluation Criteria for a ^* ○: Δa ^* > − 3.0 Little decrease in redness Δ: −3.0 ≧ Δa ^* > − 5.0 Redness is slightly decreased ×: −5.0 ≧ Δa ^* Redness is greatly reduced

Evaluation criteria for b ^* ○: Δb ^* > − 1.5 Almost no discoloration with respect to blue Δ: −1.5 ≧ Δb ^* > − 2.5 Blue is slightly increased ×: −2.5 ≧ Δb ^* Large increase in blueness

[Viscosity measurement test]
Immediately after preparing the sample, the viscosity is measured with a B-type viscometer to obtain the initial viscosity. Furthermore, the viscosity was measured with a B-type viscometer even after 3 months in a 25 ° C. constant-temperature bath storage from sample preparation, and the viscosity change rate was determined by the following formula.
Viscosity change rate (%) = (viscosity after 3 months−initial viscosity) / initial viscosity × 100
The evaluation criteria for viscosity stability are shown below.
A: Absolute value of viscosity change rate is less than 20%
Viscosity change has almost no effect on the feel of use. X: Absolute value of viscosity change rate is 20% or more
Viscosity change affects use feeling

[Examples 1 to 5, Comparative Examples 1 and 2]
For each component in Table 2, a makeup base was prepared by the following production method, and each test was performed. The results are shown in Table 2.

(Makeup base manufacturing method)
(A): Components 13 to 18 are heated to 80 ° C., mixed uniformly, and cooled to room temperature.
(B): Components 1 to 12 are mixed uniformly.
(C): a is added to b and emulsified and mixed.
In addition, the silicone-treated ultramarine UNIPURE PINK LC589 in Table 1 component 12 has a structure of Na ₇ Al ₆ Si ₆ O ₂₄ S ₄ .

In Examples 1 to 5 in which histidine or arginine was blended as a basic amino acid, a vivid pink color was maintained by visual evaluation, and Δa ^* and Δb ^*, which are indicators of discoloration, were small and excellent in discoloration stability. It was. Moreover, there was no problem also about a viscosity change.
On the other hand, Comparative Example 1 in which no basic amino acid was blended was discolored from pink to blue by visual evaluation, the negative values of Δa ^* and Δb ^* were large, and the discoloration stability was inferior. . In addition, the viscosity was greatly reduced.
About the comparative example 2 which mix | blended magnesium sulfate which is a bivalent metal salt instead of a basic amino acid, it was inferior to discoloration stability compared with Examples 1-5.

Formulation Example 1 Makeup Base

1. Cyclomethicone 10
2. Dimethicone 30
3. Polyether-modified silicone 6
4). Polyglyceryl triisostearate-2 1
5. Silicone-treated titanium oxide 7
6). Silicone-treated iron oxide 0.5
7). Silicone-treated zinc oxide 1
8). Silicone treatment ultramarine 2
9. Dextrin palmitate 0.5
Ten. Polymethyl methacrylate 4
11． Silica 2
12.1,3-Butylene glycol 5
13. Histidine 2
14. Water residue

Ingredients 12-14 are mixed uniformly at 80 ° C. (referred to as a). 1 to 11 are uniformly mixed at room temperature (referred to as b). Add a cooled to room temperature to b and emulsify and mix.

Formulation Example 2 Makeup Base Cyclomethicone 0.5
2. Squalane 5
3. Isotridecyl isononanoate 10
4). Polyether-modified silicone 0.5
5. Polyglyceryl triisostearate-2 2
6). Silicone-treated titanium oxide 3
7). Silicone-treated iron oxide 0.2
8). Silicone-treated zinc oxide 0.3
9. Silicone treatment ultramarine 1
Ten. Dextrin palmitate 0.5
11． Polymethyl methacrylate 2
12． Silica 1
13. 1,3-Butylene glycol 5
14. Glycerin 2
15． Lysine 0.05
16． Water residue

Ingredients 13 to 16 are uniformly mixed at 80 ° C. (referred to as a). 1-12 are uniformly mixed (normally b) at room temperature. Add a cooled to room temperature to b and emulsify and mix.

Claims (5)

A water-in-oil emulsified cosmetic comprising (A) one or more amino acids selected from histidine or lysine and (B) Gunjou. 2. The water-in-oil emulsified cosmetic according to claim 1 , wherein the chemical formula of Gunjo as the component (B) is Na _X Al ₆ Si ₆ O ₂₄ S ₄ (x = 6 to 8). The water-in-oil emulsified cosmetic according to claim 1 or 2 , wherein the component (B) Gunjo is surface-treated with silicones. The said component (A) is 0.05-5 mass% in the whole water-in-oil emulsion cosmetic, The water-in-oil emulsion cosmetic in any one of Claims 1-3 characterized by the above-mentioned. The water-in-oil emulsified cosmetic according to any one of claims 1 to 4 , which does not contain an organic tar pigment.