JPH06104609B2 - Cosmetics - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention contains tabular barium sulfate having a specific shape and a surfactant multivalent metal salt pigment powder, and has a smooth spread with a soft feeling. However, the present invention relates to a cosmetic composition which is excellent in conformity with and familiar to the skin, has a dry feel, and can cover color unevenness such as spots and freckles without thickening.

[Problems to be Solved by Prior Art and Invention]

For finishing cosmetics such as foundation, white powder, blusher, eye shadow, etc., it is excellent in function due to its spreadability, adherence to skin, familiarity, softness, etc., and does not thicken stains, freckles, etc. The ability to cover is very important. Of these, in order to meet the demand for covering uneven colors such as spots and freckles,
Conventionally, pigments with high covering power and pigments with high coloring power, that is, titanium dioxide, red iron oxide, which are pigments with a large refractive index,
A method has been used in which yellow iron oxide, black iron oxide, etc. are blended as a coloring pigment to enhance the covering power, thereby making it difficult to see color unevenness such as spots and freckles present on the skin.

However, when a large amount of the above-mentioned pigment having a high hiding power is blended, there is a drawback that when applied to the skin, a thick makeup is exhibited and the opaque and natural feeling is lost.

In addition, in order to enhance the feeling of use such as spreading, sticking to the skin, familiarity, and softness, mica, talc, sericite, kaolin and other plate-like clay minerals commonly used as extender pigments of these types, The optimum one is selected from the average particle size, particle size distribution, etc., and blended into the cosmetics.

However, there is a limit to the clay minerals that can be used in cosmetics, and even if the optimum type of clay mineral, particle size, and particle size distribution is selected, there is a limit in the usability of the resulting cosmetics. Therefore, in recent years, spherical powders of nylon, polymethylmethacrylate, polyethylene, polystyrene, cellulose, silica and the like have been blended in cosmetics in order to improve the spread. However, when these spherical powders are blended, there is an effect on the spread, but the stickiness tends to be poor, and it has been difficult to improve both the spread and stick performances. Moreover, the softness of use was not satisfactory either.

Therefore, there has been a demand for a finish cosmetic which is excellent in the feeling of use such as spreadability, fit to the skin, familiarity, and softness, and can cover color unevenness such as spots and freckles without thickening.

[Means for Solving the Problems]

Under such circumstances, as a result of intensive studies by the present inventors, a cosmetic containing plate-shaped barium sulfate having a specific shape and a surfactant multivalent metal salt pigment powder having a specific shape has a soft feeling in use. The present invention has been completed by discovering that it has a smooth spread, is excellent in conformity to the skin, has a smooth feel, and has a dry feel, and can cover color unevenness such as spots and freckles without thickening.

That is, the present invention has (a) and (b) (a) a plate-like structure, and the ratio of the average diameter to the thickness of the plate-like surface is 5
〜100, and the ratio of the square of the perimeter of the plate-like surface to the total area of the plate-like surface is 20-150 (b) The minor axis is 1/1 to 1/100 of the major axis. The present invention provides a cosmetic characterized in that it contains one or more surfactant multivalent metal salt pigment powders having a thickness of 1/2 or less of the major axis.

In the present invention, the minor axis, major axis and thickness of the powder are based on the values obtained as a result of electron microscope observation, and the average particle size is determined by a laser diffraction particle size analyzer (Seishin Enterprise SK LAS Co., Ltd.).
(Measured with ER MICRON SIZER).

It has a plate-like structure which is the component (a) of the present invention, the ratio of the average diameter of the plate-like surface to the thickness is 5 to 100, and the square of the perimeter of the plate-like surface and the total area of the plate-like surface are The plate-shaped barium sulfate having a ratio of 20 to 150 has such a structure,
The manufacturing method is not particularly limited. The average diameter of the plate-shaped barium sulfate is not particularly limited, but is preferably in the range of 0.1 to 50 μm.

Of such plate-like barium sulfate, particularly barium ion concentration 0.001 ~ 0.05 mole / barium salt solution and sulfate ion concentration 0.001 ~ 0.05 mole / sulfate solution 1:10 ~
Butterfly-like barium sulfate produced by reacting at a molar ratio of 5: 1 at pH 1.0 to 5.0 and 50 to 100 ° C is preferable. The barium salt may be any one that is soluble in a solvent such as water or alcohol, and examples thereof include barium chloride, barium nitrate, barium acetate, and barium hydroxide.
The purity of the metal ions other than barium is preferably 1000 ppm or less. In addition, the sulfate means water-soluble, sulfate and sulfuric acid in a solvent such as alcohol. Examples of the sulfate include sodium sulfate, ammonium sulfate and the like, and like barium salt, those containing no metal ion. Is preferred.

The minor axis which is the component (b) of the present invention is 1/1 to 1/100 of the major axis,
As the surfactant polyvalent metal salt pigment powder having a thickness of 1/2 or less of the major axis, for example, the minor axis is 1/1 to 1/100 of the major axis, and the thickness is 1/2 or less of the major axis, Alkylphosphoric acid polyvalent metal salt powder such as zinc monoalkylphosphate salt, Amidosulfonic acid polyvalent metal salt powder such as N-lauryl taurine calcium salt, N
An acylated amino acid polyvalent metal salt such as -lauroyl-β-alanine calcium salt can be used.

As the alkylphosphoric acid metal salt powder such as zinc salt of monoalkylphosphoric acid, for example, those produced by the method shown in JP-A-60-248605 and JP-A-61-229889 can be used. From the viewpoint of usability, zinc, calcium, magnesium, barium, and strontium salts of alkyl phosphates having an alkyl chain of 8 or more carbon atoms are preferable, and zinc monoalkyl phosphates containing plate crystal particles as a main component are preferable. Salts can be used. The zinc monoalkylphosphate salt containing plate crystal particles as a main component can be produced, for example, by the following method. That is, the degree of neutralization is 0.8 to 1.2.
The general formula (I) is (Wherein R represents a saturated or unsaturated linear or branched hydrocarbon group having 8 to 32 carbon atoms) and an alkali metal salt of monoalkyl phosphoric acid (I) represented by the general formula (II) XmYn (II) (wherein X represents zinc, Y represents an inorganic anion or an organic acid anion, and m and n represent integers corresponding to the valences of Y and X, respectively) by salt exchange React and then
It is produced by adjusting the pH in the range of 2 to 6.

The degree of neutralization here is defined as 0.0 when monoalkyl phosphoric acid is not neutralized, 1.0 when neutralized to the first equivalent point with an alkali metal salt, and 2.0 when neutralized to the second equivalent point. To do. The degree of neutralization of the alkali metal salt of monoalkyl phosphoric acid (I) is 0.8 to 1.2, preferably 0.9 to 1.1.

R in the formula (I) is a saturated or unsaturated, straight-chain or branched-chain hydrocarbon group having 8 to 32 carbon atoms, for example, octyl, nonyl, decyl, dodecyl, undecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl. , Heptadecyl, octadecyl, nonadecyl, eicosyl, heneicosyl, docosyl, tricosyl, tetracosyl, pentacosyl, hexacosyl, heptacosyl, octacosyl,
Nonacocil, triacontyl, hentriacontyl, dotriacontyl group, and the like. Among them, the monoalkyl zinc phosphate alkali metal salt has a particle shape and size that have excellent performance as a powder for cosmetics. 12
-18 straight chain saturated hydrocarbon groups are preferred.

The alkali metal salt of monoalkylphosphoric acid (I) used as a raw material can be prepared by a method of neutralizing monoalkylphosphoric acid with an alkali metal hydroxide or a method of cation exchange of a dialkali metal salt with an ion exchange resin or an acid. Obtainable. When producing the alkali metal salt of monoalkyl phosphate, the purity of the monoalkyl phosphate used as a raw material affects the crystal shape of the alkali metal salt of zinc monoalkyl phosphate, and the performance as a powder for cosmetics. Therefore, the purity of monoalkyl phosphoric acid is
It is preferably 80% by weight (hereinafter referred to simply as "%") or more, and particularly preferably 95% or more.

In the formula (II), Y is an inorganic anion or an organic acid anion, such as halogen, SO ₄ , NO ₃ , CO ₃ , PO ₄ , OH.
Inorganic anions such as; anionic anions such as acetic acid, propionic acid, citric acid, etc., among which halogen, SO
Inorganic anions such as ₄ , PO ₄ , NO ₃ , and CO ₃ are preferable, and among others,
Zinc salts such as water-soluble ZnSO ₄ and ZnCl ₂ are particularly preferable.

An alkali metal salt of monoalkylphosphoric acid (I), (II)
The zinc salt represented by the formula can be reacted in a reaction solvent composed of water or a mixed solvent of water and a water-soluble organic solvent at a temperature at which the alkali metal salt of monoalkylphosphoric acid (I) is completely dissolved or higher. preferable. Here, as the water-soluble organic solvent, for example, acetone, methanol, ethanol, iso
-Propyl alcohol, n-propyl alcohol, n-
Butyl alcohol, sec-butyl alcohol, tert-butyl alcohol, ethylene glycol, diethylene glycol, acetonitrile, tetrahydrofuran, dioxane, dimethylformamide (DMF), dimethylsulfoxide (DMSO) and the like can be mentioned. These may be used alone or in combination of two or more. Among them, acetone, methanol, ethanol, iso-propyl alcohol, n-propyl alcohol and the like are preferable. As the reaction solvent, only water may be used,
Further, water and a mixed solvent of one or more kinds of the above-mentioned water-soluble organic solvents may be used, but in particular, water-soluble organic solvents such as acetone, methanol, ethanol, iso-propyl alcohol, n-propyl alcohol and water. A mixed solvent with is suitable. Any method may be used for mixing water and the water-soluble organic solvent, and a non-water-soluble organic solvent that does not influence the reaction may be added to the mixed solvent of water and the water-soluble organic solvent. Any method may be used, and the method is not limited.

The concentration of the alkali metal salt of monoalkylphosphoric acid (I) in the reaction solvent is not particularly limited. However,
This concentration may affect the size of the particles of the zinc monoalkyl phosphate alkali metal salt produced. That is, the higher the concentration of the alkali metal salt of monoalkylphosphoric acid (I), the smaller the average particle size of the produced monoalkylphosphoric acid zinc salt. Therefore, from the viewpoint of feeling of use, it is preferable that the particle size of the particles is 5 to 30 μm. Therefore, the concentration of the alkali metal salt of monoalkylphosphoric acid (I) is preferably 70% or less.

The zinc salt represented by the formula (II) is added in a molar ratio of 0.1 with respect to 1 part of the alkali metal salt of monoalkylphosphoric acid (I).
It is 4 or more, preferably 0.4 to 0.6. The zinc salt (II) is used in the reaction as an aqueous solution or as a solid. When added as an aqueous solution, the zinc salt (II) is preferably highly concentrated from the viewpoint of production efficiency.

The reaction temperature is not particularly limited as long as the monoalkyl phosphoric acid (I) is completely dissolved, but 70 ° C or higher is particularly preferable.

When the zinc salt (II) is added to the alkali metal salt of monoalkylphosphoric acid (I), the pH of the reaction system depends on the concentration and temperature of the monoalkylphosphoric acid (I), but the pH of the monoalkylphosphoric acid (I) is 10%. % Is lower than 2 at 70-80 ℃,
Often lower than 1.5. Below, the pH is measured at 70-8
This is the value when performed at 0 ° C. When the pH is lower than 2, the particle shape of the alkali metal zinc alkylalkylphosphate is a mixture of needles and plates, and when the pH is higher than 6, the particle shape of the alkali metal zinc alkylalkylphosphate is mostly non-uniform. It becomes a fixed form, and the performance such as feeling of use deteriorates significantly.
It is necessary to adjust the pH of the system to 2 to 6, preferably 3 to 5, in order to make the particle shape of the zinc monoalkylphosphate alkali metal salt into a plate shape and to impart excellent performance. The pH of the system can be adjusted by the amount of the alkaline compound added. The amount of the alkali compound added to adjust the pH is 0.3 to 0.7 equivalent, preferably 0.45 to 0.55, relative to the alkali metal salt of monoalkylphosphoric acid (I).
It is equivalent. As such an alkali compound, an alkali metal hydroxide is preferable, and sodium hydroxide and potassium hydroxide are particularly preferable. The method for adjusting the pH of this reaction solution is
It is not limited in any way. For example, the zinc salt (II) may be adjusted after the addition, or the zinc salt (II) may be adjusted at the same time and kept constant. concrete
As a method for adjusting the pH, for example, a method in which the zinc salt (II) is added to the alkali metal salt of the monoalkylphosphoric acid (I) and the reaction is performed while the pH is sequentially adjusted with the alkali metal hydroxide; monoalkylphosphoric acid (I ) After adding all zinc salt (II) to the alkali metal salt of
There is a method of adjusting pH.

The reaction liquid thus reacted is cooled, filtered, washed with water,
When dried, it is possible to obtain an alkali metal salt of zinc monoalkylphosphate, which has the above-mentioned plate-like crystal particles as a main component and has excellent properties as a powder for cosmetics.

The amide sulfonic acid polyvalent metal salt powder such as N-lauryl taurine calcium salt can be produced, for example, in the same manner as a usual metal soap synthesis method. That is, for example, amidosulfonic acid R ¹ represents a linear or branched alkyl group having 7 to 21 carbon atoms, an alkenyl group or a hydroxyalkyl group, and R ²
Represents a hydrogen atom or a methyl group, X represents an ethylene group, a propylene group or Soluble metal salt of is dissolved in water, an aqueous solution of a water-soluble polyvalent metal salt is added to the solution in an approximately equal amount, and after salt exchange, the mixture is sufficiently stirred, filtered, washed with water, and then dried. can get. Examples of the water-soluble polyvalent metal salt used here include aluminum sulfate, aluminum chloride, aluminum nitrate, potassium aluminum sulfate, magnesium chloride, magnesium sulfate, magnesium nitrate, potassium magnesium sulfate, calcium chloride, zinc chloride, zinc nitrate, and sulfuric acid. Examples thereof include zinc, zinc acetate, zirconium sulfate, zirconium chloride, titanium oxysulfate and titanium tetrachloride.

The longer the addition time of this water-soluble polyvalent metal salt, the larger the particle diameter of the polyvalent metal salt of amidosulfonic acid can be obtained.

The crystal powder of the obtained amidosulfonic acid polyvalent metal salt may be needle-shaped, pomegranate-shaped, or plate-shaped crystals depending on the reaction conditions, the type of salt, etc., but especially when the plate-shaped crystals are mixed in the cosmetic, It is preferable because it is excellent in use.

The acylated amino acid polyvalent metal salt such as N-lauroyl-β-alanine calcium salt can be produced, for example, in the same manner as a usual metal soap synthesis method. That is,
Eg acylated amino acids Here, R ³ is a linear or branched alkyl having 7 to 21 carbon atoms,
Represents an alkenyl or hydroxyalkyl group, x is 1,
2, 3, 5, 10, or 11), which is a soluble metal salt, is dissolved in water, and an aqueous solution of a water-soluble polyvalent metal salt is added to the solution in an approximately equal amount to form a salt. After replacement, it is obtained by sufficiently stirring, filtering, washing with water, and then drying. As the water-soluble polyvalent metal salt used here, the same ones as those used for producing the amidesulfonic acid polyvalent metal salt powder can be mentioned.

The longer the addition time of the water-soluble polyvalent metal salt, the larger the particle size of the acylated amino acid polyvalent metal salt can be obtained.

The obtained crystalline powder of the acylated amino acid polyvalent metal salt may be needle-shaped, pomegranate-shaped, or plate-shaped crystals depending on the reaction conditions, the type of salt, etc., but especially when the plate-shaped crystals are blended in a cosmetic composition. It is preferable because of excellent usability.

The particle size of these surfactant polyvalent metal salt pigment powders is not particularly limited, but the average particle size is preferably in the range of 0.1 to 50 μm.

The plate-shaped barium sulfate and the surfactant polyvalent metal salt pigment powder used in the present invention can be used as they are by blending them in a cosmetic composition.
Alumina treatment, silica-alumina treatment, titania treatment, inorganic treatment such as barium sulfate treatment and / or silicon treatment, metal soap treatment, amino acid treatment, lecithin treatment,
It is also possible to use an organic surface-treated product such as collagen treatment or fluororesin coating treatment.

The amount of the plate-shaped barium sulfate and the surfactant polyvalent metal salt pigment powder to be mixed in the cosmetic is not particularly limited, but each is preferably 1 to 80%, particularly preferably 5 to 70%, and the total of these essential components. It is preferred that the amount is 5-99%, especially 20-99%.

In addition to the above-mentioned essential components, the cosmetics of the present invention can be appropriately blended with components used in ordinary cosmetics within a range that does not impair the effects of the present invention. Among these components, as the powder, for example, talc, mica, sericite, kaolin, bentonite, vermiculite, hectorite,
Inorganic pigments such as zeolite, silica, alumina, hydilite, aluminum silicate, magnesium silicate, calcium silicate, magnesium aluminum silicate, magnesium carbonate, calcium carbonate, barium sulfate, hydroxyapatite, boron nitride, barium sulfate treated mica Spherical spherical powders such as spherical nylon powder, spherical polymethylmethacrylate powder, spherical polyethylene powder, spherical polystyrene powder, spherical benzoguanamine powder, spherical fluororesin powder and the like; zirconium oxide coated nylon powder;
Organic-inorganic composite powder such as nylon powder coated with titanium oxide; inorganic white pigment such as titanium dioxide and zinc oxide; inorganic red pigment such as iron oxide (red iron oxide) and iron titanate; inorganic brown pigment such as γ-iron oxide Pigments: Inorganic yellow pigments such as yellow iron oxide and loess; Inorganic black pigments such as black iron oxide, carbon black and low order titanium oxide; Inorganic purple pigments such as mango violet and cobalt violet; Chromium oxide, chromium hydroxide , Inorganic green pigments such as cobalt titanate; inorganic blue pigments such as ultramarine blue and navy blue; titanium oxide coated mica,
Pearl pigments such as bismuth oxychloride, titanium oxide coated bismuth oxychloride, titanium oxide coated talc, colored titanium oxide coated mica, fish scale foil; metal powder pigments such as aluminum powder and copper powder; cellulose, silk, N ^ε -lauroyl-L -Organic pigments such as lysine; Red 201, Red 202, Red 204, Red 205, Red 220, Red 226, Red 228, Red 405
No., Orange No. 230, Orange No. 204, Yellow No. 205, Yellow No. 401, Blue No. 404, Red No. 3, Red No. 104, Red No. 106, Red No. 227
Zirconium, barium or aluminum lakes such as red, red 230, red 401, red 505, orange 205, yellow 4, yellow 5, yellow 202, yellow 203, green 3 and blue 1 Organic coloring pigments; natural pigments such as chlorophyll and β-carotene. These powders are
Although it can be used as it is, silica treatment, alumina treatment, silica-alumina treatment, titania treatment, inorganic treatment such as barium sulfate treatment and / or silicon treatment, metal soap treatment, amino acid treatment, lecithin treatment, collagen treatment, fluorine treatment It is also possible to use a powder having an organic surface treatment such as a resin coating treatment.

Examples of components other than powder include liquid oil, solid fat (wax), semi-solid oil, ultraviolet absorber, moisture retaining properties such as polyol, water-soluble polymer, oil-soluble polymer, polymer latex, and various interfaces. Activators, fragrances, antioxidants, vitamins, hormones, etc. can be used. Of these, the liquid oil is not particularly limited as long as it is a liquid oil usually used in cosmetics, and examples thereof include vegetable oils such as avocado oil, camellia oil, macadamia nut oil, olive oil, jojoba oil; oleic acid, isostearic acid, etc. Alcohols such as hexadecyl alcohol, oleyl alcohol, etc .; 2-ethylhexanoic acid cetyl, 2-ethylhexyl palmitate, 2-octyldodel myristate, neopentyl glycol di-2-ethylhexanoate, tri-2- Glycerol ethylhexanoate, 2-octyldodecyl oleate, isopropyl myristate, glycerol triisostearate, glycerol tri-2-ethylhexanoate, 2-octyldodecyl oleate, isopropyl myristate, glyceryl triisostearate Ester, 2-ethylhexanoic acid diglyceride, di-paramethoxycinnamic acid-mono-2-ethylhexanoic acid glyceryl; dimethylpolysiloxane, methylhydrogenpolysiloxane, methylphenylpolysiloxane, octamethylcyclotetrasiloxane Silicone oils such as; liquid hydrocarbon oils such as liquid paraffin, squalene, squalane, and the like, and one kind or a mixture of two or more kinds can be used.

The cosmetics of the present invention can be produced according to a usual method, powder foundations, powders, blushers, other powder cosmetics such as eye shadows, oily cosmetics such as oily foundations, cream eye shadows, creamy foundations, It can be applied as an emulsified cosmetic such as a liquid foundation.

〔The invention's effect〕

The cosmetic composition of the present invention has a soft feeling and smooth spread, is excellent in sticking to and adapting to the skin, has a silky feel, and is free from thickening of color unevenness such as spots and freckles. Is something that can be covered.

〔Example〕

Hereinafter, the present invention will be further described with reference to examples, but the present invention is not limited to these examples.

Production Example 1 Production of butterfly-shaped barium sulfate: 1.74 g of special grade barium chloride reagent and 0.505 g of special grade sulfuric acid were dissolved in 1000 g of ion-exchanged water to prepare 0.008 mole / barium solution and 0.005 mole / sulfuric acid solution, respectively. Then add each solution
Heating to 70 ℃, using U-shaped stirring spring, rotation speed 1000rpm
The barium solution was added dropwise to the sulfuric acid solution stirred in 10 minutes,
Then, stirring was continued for 3 minutes to complete the reaction. Then, after cooling to room temperature, 1.12 g of powder was obtained with 5C filter paper. The obtained powder has an average diameter of 5.3 μm and an average diameter to thickness ratio of 5
8, the ratio of the square of the perimeter of the plate surface to the total area of the plate surface is 88, X
In line diffraction, (020) and (200) of barium sulfate crystals
The surface has a diffraction peak ratio of 5.3 and has a butterfly shape.
It had a well-developed plate-like structure, was transparent, and was a slippery powder.

Production Example 2 Production of zinc monocetylphosphate sodium salt: 500 ml separable flask (hereinafter referred to as reaction vessel)
Add 50 g of monocetyl phosphoric acid and 100 g of ethanol, and add 6.29 g of 96% sodium hydroxide (calculated from the degree of neutralization obtained by titration and taking into account the purity) dissolved in 200 g of ion-exchanged water. It was After raising the temperature to 80 ° C., after confirming that the solution was transparently dissolved, stirring was continued for another 30 minutes. Next, a solution prepared by dissolving 22.3 g of zinc nitrate heptahydrate in 100 g of ion-exchanged water was added dropwise to carry out a salt exchange reaction. After the completion of dropping, the mixture was stirred for 30 minutes, 8.73 g of 33.33% sodium hydroxide aqueous solution was added dropwise to adjust the pH to 3, and the mixture was further stirred for 1 hour. After the reaction is complete, it is cooled, filtered, washed with water and dried to 50.3.
g of zinc monocetylphosphate sodium salt was obtained.

The zinc monocetylphosphate sodium salt thus obtained had an average particle size of 14 μm, a ratio of minor axis / major axis of 1 / 1.25 and a ratio of thickness / major axis of 1/10.

Production Example 3 Production of N-Lauroyltaurine Calcium: A four-necked flask equipped with a stirrer, a dropping funnel and a thermometer was charged with 20 g of N-lauroylutaurine sodium salt and 380 g of deionized water to prepare a uniform solution. The solution is heated to 40 ° C. with stirring and to it is added 135 g of 5 from a dropping funnel.
% Calcium chloride aqueous solution was added dropwise over 15 minutes. Simultaneously with the dropping, crystals of N-lauryl taurine calcium salt were deposited. After the dropping was completed, the mixture was further stirred at 40 ° C. for 1 hour to complete the salt exchange. After completion of stirring, the mixture was allowed to cool to room temperature, filtered and washed. The obtained crystals were dried at room temperature to obtain 19.4 g of white crystals of the target N-lauryl taurine calcium salt. Yield 98.9%.

The thus-obtained N-lauryl taurine calcium salt has an average particle size of 7.4 μm and a ratio of minor axis / major axis of 1/1.
5. The thickness / major axis ratio was 1/20.

Production Example 4 Production of N-lauroyl-β-alanine calcium: 50 g of N-lauroyl-β-alanine, 7.4 g of sodium hydroxide and ion exchange were placed in a four-necked flask equipped with a stirrer, a dropping funnel and a thermometer. Add 423g of water and stir
Heated to 60 ° C. While maintaining the solution at 60 ° C., 64.7 g of a 20% aqueous calcium chloride solution was added dropwise from the dropping funnel over 2 hours. Simultaneously with the dropping, crystals of N-lauroyl-β-alanine calcium salt were precipitated. 60 more after dropping
Stirring was carried out at 0 ° C. for 1 hour to complete the salt exchange. After completion of stirring, the mixture was allowed to cool to room temperature, filtered and washed. The obtained crystals are dried at room temperature to give the desired product N-
5 white crystals of lauroyl-β-alanine calcium salt
2.7 g was obtained. Yield 98.5%.

The N-lauroyl-β-alanine calcium salt thus obtained had an average particle size of 11.3 μm, a ratio of minor axis / major axis of 1 / 1.5 and a ratio of thickness / major axis of 1/10.

Example 1 A powder foundation having the composition shown in Table 1 was produced, and sensory evaluation was performed for each. First result
Shown in the table.

<Manufacturing method> Components (1) to (9) are mixed and crushed and transferred to a Henschel mixer. While stirring this well, the component (10)
And (11) are gradually added. The obtained bulk was filled in a gold plate to obtain a powder foundation.

<Evaluation Method> Sensory evaluation was performed by 10 professional panelists based on the following criteria. The evaluation was performed by the relative evaluation between the evaluated cosmetics.

Evaluation of softness during use Very soft 5 Soft 4 Neither 3 Not so soft 2 Not soft 1 Evaluation on sticking to or familiar with skin Very good 5 Good 4 Neither 3 Not good 2 Not good 1 Smoothness Evaluation Very smooth 5 Not smooth 4 Not very smooth 3 Not very smooth 2 Not smooth 1 Feeling very dry 5 Very dry 4 Not very nice 3 Not very smooth 2 Not too thick 1 Noness evaluation Very thick 5 Not thick 4 Neither 3 Some thick 2 Thick 1 Strength to cover spots and freckles Very large 5 Large 4 Neither 3 Not very large 2 Not large 1 Example 2 Solid type powder: (ingredient) (%) (1) Butterfly barium sulfate (Production Example 1) 20 (2) Zinc sodium monocetylphosphate (Production Example 2) 20
(3) Amihope LL (Ajinomoto Co., Inc.) 20 (4) Remaining amount of talc (5) Sericite 15 (6) Titanium oxide 2 (7) Iron oxide 1 (8) Squalane 2 (9) Silicone oil 2 (10) Fragrance 0.1 Total 100 (Production method) Components (1) to (7) are mixed and crushed, and transferred to a Henschel mixer. While stirring this well, components (8) to (1
0) is gradually added. The obtained bulk was filled in a gold dish to obtain a solid type powder.

Examples Powder powder: (ingredient) (%) (1) Butterfly barium sulfate (Production Example 1) 60 (2) N-lauryl taurine calcium (Production Example 3)
Remaining amount (3) Titanium oxide 2 (4) Iron oxide 1 (5) Squalane 1 (6 ) Perfume 0.1 Total 100 (Production method) Components (1) to (4) are mixed and crushed, and transferred to a Henschel mixer. While sufficiently stirring this, the components (5) and (6) are gradually added. The obtained bulk was filled in a container to obtain a powdery white powder.

Example 4 Blusher: (ingredient) (%) (1) Butterfly-like barium sulfate (Production Example 1) 20 (2) N-Lauroyltaurine calcium (Production Example 3)
Remaining amount (3) Press aid 20 (4) Titanium oxide 5 (5) Coloring agent 5 (6) Perfume 0.1 Total 100 (Manufacturing method) Mix and pulverize the powder components of components (1) to (5), and then use Henschel. Transfer to a mixer. The component (6) is gradually added while sufficiently stirring this. The obtained bulk was filled in a gold plate to obtain a blusher.

Example 5 Powder eye shadow: (Component) (%) (1) Butterfly barium sulfate (Production Example 1) 30 (2) N-lauroyl-β-alanine calcium (Production Example 4) 30 (3) Press aid 20 ( 4) Remaining amount of talc (5) Titanium oxide 5 (6) Colorant 15 Total 100 (Manufacturing method) Components (1) to (6) are mixed and crushed, and the obtained bulk is filled in a gold plate and powdered eye shadow. Got

Claims (1)

[Claims] (A) and (b) (a) has a plate-like structure, and the ratio of the average diameter to the thickness of the plate-like surface is 5
〜100, and the ratio of the square of the perimeter of the plate-like surface to the total area of the plate-like surface is 20-150 (b) The minor axis is 1/1 to 1/100 of the major axis. A cosmetic comprising one or more kinds of surfactant polyvalent metal salt pigment powder having a thickness of 1/2 or less of a major axis.