JP5925558B2 - Solid powder cosmetic - Google Patents

Description

  The present invention relates to a solid powder cosmetic.

Conventionally, solid powder cosmetics have been required to have excellent usability, such as good familiarity with the skin, good adhesion, and smooth feel.
For example, powder cosmetics (Patent Document 1) using powders obtained by treating muscovite, phlogopite, etc. with a cationic surfactant, powder components and oil components, and tetraalkylammonium salts as surface treatment agents are used. Powdered cosmetics (Patent Document 2) and the like have been studied.
Further, in solid powder cosmetics, the use feeling and the effect of concealing the unevenness of the skin are improved by blending a spherical powder. Furthermore, an ultraviolet scattering effect and a covering power are improved by blending fine particle components.

JP 2006-199645 A JP 2010-37328 A

The present inventor has found that the powder cosmetics of Patent Document 1 and Patent Document 2 have low adhesiveness between powders and have problems in moldability and adhesion to skin.
In addition, solid powder cosmetics blended with spherical powder have poor moldability when molded in a dry process, and the wet manufacturing method has complicated processes and has a problem with respect to environmental impact. Furthermore, the fine particle component easily aggregates, and a rough feeling is generated during use, and there are also problems in the feeling of adhesion to the skin and the smooth feel.
The present invention provides a solid powder cosmetic excellent in moldability and impact resistance, and has a smooth feel, excellent adhesion to the skin, suppresses the feeling of powder, and makes unevenness such as pores inconspicuous. Is an issue.

  This inventor discovered that the solid powder cosmetics which solved the said subject would be obtained if it uses combining a postscript component (A)-(E) in a specific ratio.

The present invention includes the following components (A) to (E):
(A) 2-30% by mass of synthetic phlogopite and / or iron-containing synthetic phlogopite,
(B) 1 to 10% by mass of organic plate-like powder,
(C) 1-20% by mass of boron nitride,
(D) 5-20% by mass of spherical powder having an average particle size of 0.2-10 μm,
(E) 2-15 mass% of oil agent liquid at 25 degreeC
The mass proportion of components (A) and (C) is (A) / (C) = 0.2-2, and the mass proportion of components (A), (B) and (C) is (A) / ((B) + (C)) = 0.1-1.5 The solid powder cosmetic is provided.

  The solid powder cosmetic of the present invention is excellent in moldability and impact resistance, has a smooth feel at the time of application, has excellent adhesion to the skin, suppresses the feeling of powder, and can make unevenness such as pores inconspicuous. .

The component (A) used in the present invention is synthetic phlogopite and / or iron-containing synthetic phlogopite. Examples of the synthetic phlogopite include those obtained by mixing and melting anhydrous silicic acid, aluminum oxide, magnesium oxide, and potassium silicofluoride, crystallizing crystals, pulverization, and heat treatment. Examples thereof include those obtained by mixing and melting silicic anhydride, aluminum oxide, magnesium oxide, potassium silicofluoride and iron oxide, crystallizing crystals, pulverizing and heat treatment.
The iron-containing synthetic phlogopite preferably has an iron content of 0.5 to 10% by mass in terms of iron oxide from the viewpoint of giving a highly transparent finish.

The shape is preferably plate-shaped, the average particle diameter is preferably 3 to 20 μm and the aspect ratio is preferably 20 to 70, and the average particle diameter is preferably 5 to 15 μm and the aspect ratio is 30 to 60.
In the present invention, the particle diameter is measured by an electron microscope observation and a particle size distribution measuring device by a laser diffraction / scattering method. Specifically, in the case of the laser diffraction / scattering method, measurement is performed with a laser diffraction / scattering particle size distribution analyzer (for example, LA-920, manufactured by Horiba, Ltd.) using ethanol as a dispersion medium. The thickness is determined by measuring the difference from the reference plane with an atomic force microscope, and calculating the arithmetic mean to obtain the average thickness.
The aspect ratio is calculated by the ratio between the average particle diameter and the average thickness of the particles, and is defined as aspect ratio = (average particle diameter / average thickness).

  Ingredient (A) can be used singly or in combination of two or more, and the lower limit is 2% by mass or more and 5% by mass with respect to the entire cosmetic from the viewpoint of obtaining a soft feeling of use and a highly transparent finish. % Or more is preferable, and 7 mass% or more is more preferable. Moreover, an upper limit is 30 mass% or less, 25 mass% or less is preferable and 20 mass% or less is more preferable. If these viewpoints are put together, it is 2-30 mass%, it is preferable to contain 5-25 mass%, and it is more preferable to contain 7-20 mass%.

The organic plate-like powder of component (B) used in the present invention preferably has an average particle size of 1 to 50 μm, more preferably 3 to 20 μm. Also, those having an aspect ratio of 1 to 100 are preferable, and those having an aspect ratio of 30 to 70 are more preferable. The plate shape includes a plate shape in a narrow sense, as well as powders such as a flake shape and a scale shape.
The organic plate-like powder of component (B) preferably has an average particle diameter of 3 to 20 μm and an aspect ratio of 30 to 70 from the viewpoint of moldability and usability.
The particle diameter is measured in the same manner as in component (A), and the aspect ratio is determined in the same manner as in component (A).

  Specifically, it is generally insoluble in water and oil, and examples thereof include resin powder and amino acid powder.

  Examples of the resin powder include plate-like resin powders such as polyethylene, polypropylene, nylon, polymethyl methacrylate, benzoguanamine resin, polystyrene, divinylbenzene / styrene copolymer, and tetrafluoroethylene (for example, JP-A-57). -78466, JP-A-62-190112, JP-A-62-104706).

  Examples of amino acid powders include acylated amino acids, acylated amide sulfonic acids, and the like. More specifically, N-acyl lysines such as Nε-lauroyl lysine, Nε-palmitoyl lysine, Nε-caproyl lysine; Nα-stearoyl ornithine, etc. N-acylornithine; N-acyl diaminobutyric acid such as Nγ-palmitoyl-α, γ-diaminobutyric acid; N-acylarginine such as Nε-lauroylarginine; N-acyl histidine such as Nα-cocoylhistidine Acylated amide sulfones such as basic amino acids (for example, JP-A-60-67406, JP-A-5-58842); N-acylated taurine polyvalent metal salts (for example, JP-A-2002-80325) Examples include acids. As a commercially available product, Amihope LL (manufactured by Ajinomoto Co., Inc.), which is Nε-lauroyllysine, can be used.

  The component (B) is preferably an amino acid powder, more preferably an acylated amino acid or an acylated amide sulfonic acid, still more preferably an acylated amino acid, and even more preferably Nε-lauroyl lysine.

  Component (B) can be used alone or in combination of two or more, and from the viewpoint of ensuring sufficient moldability, the lower limit is 1% by mass or more, preferably 2% by mass or more, with respect to the entire cosmetic. 3 mass% or more is more preferable. Moreover, an upper limit is 12 mass% or less, 10 mass% or less is preferable and 7 mass% or less is more preferable. When these viewpoints are put together, it is contained in 1 to 12% by mass, preferably 2 to 10% by mass, and more preferably 3 to 7% by mass.

The component (C) boron nitride used in the present invention can be used without particular limitation as long as it is used in ordinary cosmetics. The form of boron nitride may be any of hexagonal crystal, wurtzite structure, cubic crystal, rhombohedral crystal, and disordered layer structure, and hexagonal crystal is preferable from the viewpoint of usability.
Boron nitride preferably has an average particle size of 2 to 15 μm, more preferably 4 to 10 μm, from the viewpoint of good slipping at the time of coating and imparting appropriate glossiness.
As a commercial item, SHP-3, SHP-6 (above, Mizushima alloy iron company make) etc. can be used.

  Component (C) can be used alone or in combination of two or more, and the lower limit is 1% by mass or more with respect to the entire cosmetic from the viewpoint of achieving both high spreadability and adhesiveness and improving coatability. Yes, 5 mass% or more is preferable, and 7 mass% or more is more preferable. Moreover, an upper limit is 20 mass% or less, 17 mass% or less is preferable and 15 mass% or less is more preferable. When these viewpoints are put together, it is contained in 1 to 20% by mass, preferably 5 to 17% by mass, and more preferably 7 to 15% by mass.

  In the present invention, the mass proportions of components (A) and (C), (A) / (C) are excellent in moldability and impact resistance, have a smooth feel at the time of application, and have excellent adhesion to the skin. From the viewpoint of suppressing the feeling of powder, the lower limit is 0.2 or more, preferably 0.3 or more, and more preferably 0.5 or more. Moreover, an upper limit is 2 or less, 1.5 or less are preferable and 1.3 or less are more preferable. When these viewpoints are put together, (A) / (C) = 0.2-2, further preferably 0.3-1.5, more preferably 0.3-1.3, 0 More preferably, 5-1.3.

  In the present invention, the mass ratio of the components (A), (B) and (C), (A) / ((B) + (C)) is a smooth feel at the time of application, and has moldability and impact resistance. The lower limit is 0.1 or more and 0.2 or more from the viewpoint of excellent adhesion to the skin, suppressing powdery feeling, making irregularities such as pores inconspicuous, and obtaining a highly transparent finish. Is preferred. Moreover, an upper limit is 1.5 or less, and 1 or less is preferable. When these viewpoints are put together, (A) / ((B) + (C)) = 0.1 to 1.5, and more preferably 0.2 to 1.

The spherical powder of the component (D) used in the present invention has an average particle diameter of 0.2 to 10 μm, and 2 to 8 μm is preferable from the viewpoint of improving the feeling of use and suppressing conspicuous unevenness of pores and skin. The spherical shape refers to a powder having a substantially spherical shape, and may be a spheroid, a spherical powder having irregularities on the surface, etc. The ratio of the short diameter / long diameter of the spherical powder, that is, the ellipticity is 1 0.5 or less is preferable, 1.2 or less is more preferable, and 1.1 or less is more preferable.
Any spherical powder may be used as long as it is used in ordinary cosmetics. For example, polyamide powder, nylon powder, polyester powder, polyethylene powder, polytetrafluoroethylene powder, polypropylene powder, polystyrene powder, benzoguanamine powder. , Polymethylbenzoguanamine powder, polymethyl methacrylate powder, polyurethane powder, vinyl resin, fluorine resin, acrylic resin, melamine resin; silicone powder such as silicone elastomer powder or polymethylsilsesquioxane powder crosslinked with dimethyl silicone;
Poly (meth) acrylic acid, such as butyl acrylate / vinyl acetate copolymer, styrene / acrylic acid copolymer, divinylbenzene / styrene copolymer, (lauryl methacrylate / ethylene glycol dimethacrylate) copolymer, Cross-linked or non-crosslinked type such as powder of one or more kinds of polymers or copolymers selected from sodium poly (meth) acrylate, poly (meth) acrylic ester, poly (meth) acrylate alkylene glycol The organic spherical powder is mentioned.
Of these, nylon powder, polyurethane powder, and silicone elastomer are preferable, and nylon powder and silicone elastomer are more preferable.

  Ingredient (D) can be used alone or in combination of two or more thereof, the unevenness of the skin is not conspicuous, a smooth finish is imparted, and the moldability is ensured. 5 mass% or more, preferably 8 mass% or more, more preferably 10 mass% or more. Moreover, an upper limit is 20 mass% or less, 16 mass% or less is preferable and 13 mass% or less is more preferable. When these viewpoints are put together, 5 to 20% by mass is contained, 8 to 16% by mass is preferred, and 10 to 13% by mass is more preferred.

In the solid powder cosmetic of the present invention, any of the powders of the components (A) to (D) can be used as they are, and one or more of these powders have been subjected to a hydrophobic treatment. Can also be used.
The hydrophobizing treatment is not limited as long as it is a treatment applied to normal cosmetic powders. Silicone treatment, fatty acid treatment, lauroyllysine treatment, lecithin treatment, N-acylamino acid treatment, metal soap treatment, fluorine Compound treatment and the like can be mentioned. Of these, fluorine compound treatment and silicone treatment are preferred.

  The treatment amount of the hydrophobizing treatment varies depending on the powder, but the lower limit is preferably 2% by mass or more and more preferably 3% by mass or more with respect to 100% by mass of the powder. Further, the upper limit is preferably 7% by mass or less, and more preferably 5% by mass or less. If these viewpoints are put together, it is preferable that it is 2-7 mass%, and it is more preferable to process 3-5 mass%. If it is this processing amount, since water repellency and oil repellency are provided and makeup sustainability can be ensured, it is preferable.

The solid powder cosmetic of the present invention can contain powders used in ordinary cosmetics in addition to the components (A) to (D).
Such powder is not particularly limited as long as it is an extender pigment or a color pigment used in normal cosmetics, for example, silicic acid, silicic anhydride, magnesium silicate, talc, sericite, mica, kaolin, bengara, Clay, bentonite, mica, titanium-coated mica, bengara-coated mica titanium, bengara-black iron oxide-coated mica titanium, koji-coated mica titanium, titanium oxide-coated borosilicate, bismuth oxychloride, zirconium oxide, magnesium oxide, titanium oxide, zinc oxide , Aluminum oxide, calcium sulfate, barium sulfate, magnesium sulfate, calcium carbonate, magnesium carbonate, iron oxide, ultramarine, chromium oxide, chromium hydroxide, calamine, carbon black, inorganic powders such as these composites; urea resin, phenol Resin, s silicon resin, acrylic resin, Mineral resin, epoxy resin, polycarbonate resin, divinylbenzene / styrene copolymer, silk powder, cellulose, long chain alkyl phosphate metal salt, N-mono long chain alkyl acyl basic amino acid, organic powders such as these composites A composite powder of the above inorganic powder and organic powder.

  In the present invention, the content of the powder having an average primary particle diameter of 100 nm or less in the total powder containing the components (A), (B), (C) and (D) is smooth and free from roughness during coating. From the viewpoint of imparting a touch, the content is preferably 1% by mass or less, more preferably 0.5% by mass or less, still more preferably 0.1% by mass or less, and still more preferably substantially not contained.

The component (E) oil used in the present invention is liquid at 25 ° C. Here, the liquid at 25 ° C. means that the viscosity at 25 ° C. is 10000 mPa · s or less. Specifically, a B-type viscometer, rotor No. Measured at 4, 12 rpm for 1 minute.
Such oil agents may be those used in normal cosmetics, for example, straight or branched hydrocarbon oils such as liquid paraffin, light isoparaffin, liquid isoparaffin, squalane and squalene; vegetable oils such as jojoba oil and olive oil. Animal oil such as liquid lanolin; fatty acid ester, polycarboxylic acid ester, fatty acid polyhydric alcohol ester, hydroxy fatty acid ester, octyl methoxycinnamate, octyl paradimethylaminobenzoate, dl-α-tocopherol, dl nicotinate Ester oil such as α-tocopherol; silicone oil such as dimethylpolysiloxane, dimethylcyclopolysiloxane, methylphenylpolysiloxane, methylhydrogenpolysiloxane, higher alcohol-modified organopolysiloxane; fluoropolyether , Fluorine oils such as perfluoroalkyl ether silicone.
Of these, linear or branched hydrocarbon oils, fatty acid esters, polyvalent carboxylic acid esters, and octyl methoxycinnamate are preferred from the standpoint of good compatibility with powder and ensuring moldability. Hydrocarbon oils, fatty acid esters, and polyvalent carboxylic acid esters are preferred.

  Component (E) can be used singly or in combination of two or more, and the lower limit is 2 with respect to the entire cosmetic from the viewpoint of improved moldability, suppression of caking, powder removal and good usability. It is at least 3% by mass, preferably at least 3% by mass, and more preferably at least 4% by mass. Moreover, an upper limit is 15 mass% or less, 10 mass% or less is preferable and 8 mass% or less is more preferable. When these viewpoints are put together, it is contained in 2 to 15% by mass, preferably 3 to 10% by mass, and more preferably 4 to 8% by mass.

The solid powder cosmetic of the present invention is preferable because it can further contain (F) polyethylene glycol, has a good affinity with the skin, is easily compatible with the skin, and has improved impact resistance.
Such polyethylene glycol preferably has a molecular weight of 100 to 1000, more preferably 200 to 600.
The component (F) polyethylene glycol can be used singly or in combination of two or more. From the point of obtaining a moist and non-sticky feeling, the lower limit is 0.1% by mass or more with respect to the entire cosmetic. Is preferable, and 0.5 mass% or more is more preferable. The upper limit is preferably 5% by mass or less, and more preferably 3% by mass or less. If these viewpoints are put together, it is preferable to contain 0.1-5 mass%, and 0.5-3 mass% is further more preferable.

  Further, in the present invention, the mass ratio of the components (B), (C) and (F), ((B) + (C)) / (F) is a smooth feel at the time of application, and has moldability and impact resistance. The lower limit is 6 or more, and 12 or more is preferable from the viewpoints of excellent adhesion, excellent adhesion to the skin, suppressing powdery feeling, making irregularities such as pores inconspicuous, and obtaining a highly transparent finish. Moreover, an upper limit is 30 or less, and 20 or less is preferable. If these viewpoints are put together, it is ((B) + (C)) / (F) = 6-30, and it is still more preferable that it is 12-20.

  The solid powder cosmetic of the present invention is a component used in normal cosmetics in addition to the above components, such as surfactants, preservatives, antioxidants, pigments, thickeners, pH adjusters, fragrances, ultraviolet absorption Agents, moisturizers, blood circulation promoters, cooling agents, antiperspirants, bactericides, skin activators, and the like.

The solid powder cosmetic of the present invention can be produced according to a usual method. For example, after all powder components including components (A), (B), (C) and (D) were mixed and pulverized, an oil phase component including component (E) was added and mixed to obtain The mixture can be further pulverized by a pulverizer, and then the pulverized product can be molded and solidified. The pulverizer to be used is not particularly limited as long as it is a pulverizer usually used for pulverization, and examples thereof include an atomizer, a hammer mill, a jet mill, and a cutter mill. For the mixing step of the oil phase, an apparatus usually used for mixing is used, and examples thereof include a Henschel mixer and a Nauter mixer.
From the viewpoint of moldability, the solid powder cosmetic of the present invention preferably has a hardness of 58 or more and 62 or less, and more preferably 58.5 or more and 61.5 or less. The hardness is measured using an Asker hardness meter (C1L).

  The solid powder cosmetics of the present invention are suitable as makeup cosmetics such as foundations, face powders, blushers, and eye shadows. Among these, a foundation is preferable.

Examples 1-6, Comparative Examples 1-4
A solid powder cosmetic (powder foundation) having the composition shown in Table 1 was produced. About the obtained solid powder cosmetics, “natural finish”, “smoothness of touch”, “no feeling of powder”, “feeling of close contact with skin” and “hardness of pores” immediately after application to the skin Evaluated. Moreover, moldability and impact resistance were evaluated. The results are also shown in Table 1.

(Production method)
After mixing and pulverizing all powder components including components (A), (B), (C) and (D), components (E) and (F) are added and mixed, and the resulting mixture is further mixed It grind | pulverized with the grinder. The pulverized product obtained here was filled in a container and molded with a filling amount of 9.5 g and a molding pressure of 1200 kg to obtain a solid powder cosmetic.

(Evaluation method)
(1) “Natural finish”, “Smoothness of touch”, “No feeling of powder”, “Feeling of close contact with skin” and “Difficult to notice pores”:
Ten professional panelists applied each solid powder cosmetic to the skin with a sponge, “natural finish”, “smoothness of touch”, “no feeling of powder”, “feeling of close contact with skin” and “ “The difficulty of conspicuous pores” was evaluated according to the following criteria. A result is shown by the integrated value of 10 persons.

(1-1) Natural finish:
5; Finishes very naturally.
4; Natural finish.
3; Finished somewhat naturally.
2; Not finished naturally.
1; Does not finish naturally.

(1-2) Smoothness of touch:
5: Very smooth.
4; Smooth.
3; Somewhat smooth.
2; Not very smooth.
1; not smooth.

(1-3) No feeling of powder:
5: There is no powdery feeling.
4; There is no powdery feeling.
3; There is not much powder feeling.
2; There is a slight feeling of powder.
1; There is quite a feeling of powder.

(1-4) A feeling of close contact with the skin:
5; Very close contact.
4; Adhere closely.
3;
2; Not very close.
1; It does not adhere.

(1-5) Hard to notice pores:
5: Very inconspicuous.
4; Not conspicuous.
3; Slightly inconspicuous.
2; Slightly noticeable.
1: It is easy to stand out.

(2) Formability:
About each solid powder cosmetics, the hardness was measured 5 points | pieces using the Asker hardness meter (C1L), and the average value was calculated | required.

(3) Impact resistance:
Each solid powder cosmetic was dropped from a height of 40 cm onto an acrylic resin plate having a thickness of 30 mm, and the number of drops until cracking occurred was counted. The test was performed 3 times, and the average value was obtained.

Example 7 (powder foundation)
In the same manner as in Examples 1 to 6, powder foundations having the following compositions were produced.

(composition)
(1) Silicon-treated synthetic phlogopite (average particle size: 7 μm, aspect ratio 40)
(Topy Industries, PDM-5L) 10.0 (mass%)
(2) Fluorine-treated lauroyllysine (average particle size: 11 μm, aspect ratio 50)
(Ajinomoto Co., Amihope LL) 5.0
(3) Silicon-treated boron nitride (average particle size: 6 μm)
(Manufactured by Mizushima Alloy Iron Company, SHP-3) 12.0
(4) Polymethylsilsesquioxane (average particle size: 7 μm)
(GE Toshiba Silicone Co., Ltd .: Tospearl 145) 7.0
(5) Nylon powder (average particle size: 5 μm)
(Manufactured by Sumika Enviro Science: HK-5000) 6.0
(6) Neopentyl glycol dicaprate 2.0
(7) Octyl methoxycinnamate 4.0
(8) Polyethylene glycol (molecular weight: 400) 1.0
(9) Silicon-treated sericite 0.10
(10) Fluorine-treated titanium oxide 7.0
(11) Fluorine-treated yellow iron oxide 2.21
(12) Fluorine-treated Bengala 0.64
(13) Fluorine-treated black iron oxide 0.22
(14) Residual amount of silicon processing talc
(15) Preservative 0.1
Total 100

  The powder foundation obtained in Example 7 is excellent in moldability and impact resistance, has a smooth feel at the time of application, excellent adhesion to the skin, suppresses the feeling of powder, has a natural finish, and has irregularities such as pores. Can be made inconspicuous.

Claims (6)

The following components (A) to (E):
(A) 2-30% by mass of synthetic phlogopite and / or iron-containing synthetic phlogopite,
(B) 1-12% by mass of organic plate-like powder,
(C) 1-20% by mass of boron nitride,
(D) 5-20% by mass of spherical powder having an average particle size of 0.2-10 μm,
(E) 2-15 mass% of oil agent liquid at 25 degreeC
The mass proportion of components (A) and (C) is (A) / (C) = 0.2-2, and the mass proportion of components (A), (B) and (C) is (A) / ((B) + (C)) = 0.1 to 1.5 and average primary particles in all powders including components (A), (B), (C) and (D) A solid powder cosmetic in which the content of powder having a diameter of 100 nm or less is 1% by mass or less . Component (A), the average particle diameter of 3 to 20 [mu] m, the solid powder cosmetic of claim 1, wherein those of aspect ratio 20 to 70. The solid powder cosmetic according to claim 1 or 2 , wherein the component (B) is one or more selected from acylated amino acids and acylated amidosulfonic acids. The solid powder cosmetic according to any one of claims 1 to 3 , wherein one or more selected from the components (A), (B), (C) and (D) are subjected to a hydrophobic treatment. . Furthermore, the solid powder cosmetics of any one of Claims 1-4 which contain 0.1-5 mass% of (F) polyethyleneglycol. The solid powder cosmetic according to claim 5, wherein the mass proportion of the components (B), (C) and (F) is ((B) + (C)) / (F) = 6-30.