Powder-containing cosmetic

Abstract

To provide a powder-containing cosmetic having superior redispersibility and usability.SOLUTION: The present invention provides a powder-containing cosmetic comprising (a) particulate silica, (b) a powder component (excluding (a) the particulate silica), (c) a hydrophilic solvent, and (d) a nonionic surfactant, wherein the content of (a) the particulate silica is 0.25 mass% or more and less than 2 mass%, (b) / (a), which represents the content ratio of the powder component (b) to the particulate silica (a), is 5 or less, and (d) the nonionic surfactant has an organic value of 1300 or more and an inorganic value of 1900 or more.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to a powder-containing cosmetic.

Background Art

[0002] In deodorant preparations, multi-layered powder cosmetics containing lower alcohols such as ethanol and powder components are widely used. Such multi-layered powder cosmetics are used by redispersing the powder components by shaking. The inclusion of lower alcohols can provide quick-drying properties and a refreshing feeling, and the inclusion of powder components can provide a smooth feeling. However, when a multi-layered powder cosmetic is left standing after use, a phenomenon called caking occurs, in which powder components such as silica settle and solidify. Therefore, caking is prevented by mixing fine particle silica having a smaller particle size than silica.

[0003] For example, Patent Document 1 discloses a multi-layered powder cosmetic containing (a) 60 to 95% by mass of a lower alcohol, (b) a powder component (excluding the following component (c)), and (c) 0.005 to 0.2% by mass of fine particle powder having an average primary particle size of 10 to 550 nm and having silica as a mother nucleus, wherein the component (b) includes at least one selected from the group consisting of potassium aluminum sulfate, zinc oxide, extender pigment, silica having an average primary particle size exceeding 0.55 μm, and titanium oxide having an average primary particle size exceeding 0.55 μm, and separating into two or more layers including at least a powder layer and a liquid layer in a stationary state.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] If the redispersibility of the multilayer powder cosmetic is further improved compared to the prior art, a good and stable usability can be obtained, and it is expected that the range of formulations will be widened. Therefore, the present invention has been made in view of the above problems, and an object thereof is to provide a powder-containing cosmetic excellent in redispersibility and usability.

Means for Solving the Problems

[0006] The present inventors have found that the above problems can be solved by adjusting a powder component, fine particle silica effective for preventing caking, and a nonionic surfactant to specific types and blending amounts, and have arrived at the present invention.

[0007] That is, the present invention contains (a) fine particle silica, (b) a powder component (excluding (a) fine particle silica), (c) a hydrophilic solvent, and (d) a nonionic surfactant, the content of (a) fine particle silica is 0.25% by mass or more and less than 2% by mass, the content ratio (b) / (a) indicating the content ratio of (a) fine particle silica and (b) the powder component is 5 or less, and (d) the nonionic surfactant has an organic value of 1300 or more and an inorganic value of 1900 or more, and is a powder-containing cosmetic.

[0008] The average primary particle size of (a) fine particle silica is preferably 1 nm or more and 100 nm or less.

[0009] (c) The hydrophilic solvent preferably contains at least one of water and a lower alcohol.

[0010] The content of (b) the powder component is preferably 5% by mass or less.

[0011] The content of (d) the nonionic surfactant is preferably 0.05% by mass or more and 1% by mass or less.

[0012] It further contains (e) a polymer, and it is preferable that (e) the polymer is at least one selected from hydroxypropyl cellulose, hydroxypropyl methylcellulose, and xanthan gum.

[0013] (f) Further contains a water-soluble salt, and it is preferable that (f) the water-soluble salt is at least one of zinc phenolsulfonate and chlorohydroxyaluminum.

Advantages of the Invention

[0014] According to the present invention, a powder-containing cosmetic excellent in redispersibility and usability can be obtained.

Embodiments for Carrying Out the Invention

[0015] Hereinafter, embodiments of the present invention will be described in detail.

[0016] The present invention contains (a) fine particle silica, (b) a powder component (excluding (a) fine particle silica), (c) a hydrophilic solvent, and (d) a nonionic surfactant, the content of (a) fine particle silica is 0.25% by mass or more and less than 2% by mass, the content ratio (b) / (a) indicating the content ratio of (a) fine particle silica to (b) powder component is 5 or less, and (d) the nonionic surfactant is a powder-containing cosmetic having an organic value of 1300 or more and an inorganic value of 1900 or more.

[0017] (a) Fine particle silica The powder-containing cosmetic of the present invention contains fine particle silica. The "fine particle silica" contained in the powder-containing cosmetic of the present invention means silica particles having an average primary particle size of 100 nm or less. (a) As the fine particle silica, commercially available hydrophilic fumed silica or hydrophobic fumed silica can be used. The average primary particle size of (a) fine particle silica in the powder-containing cosmetic of the present invention is preferably 1 nm or more and 100 nm or less, and more preferably 3 nm or more and 40 nm or less. The "average primary particle size" of (a) fine particle silica is taken as the value measured and obtained by a transmission electron microscope photograph or a laser diffraction / scattering method.

[0018] In the powder-containing cosmetic, the content of (a) fine particle silica is 0.25% by mass or more and less than 2% by mass. When the content of (a) fine particle silica is 0.25% by mass or more, caking of the powder components can be prevented, and when the powder-containing cosmetic is inverted, more than half to all of the powder can be peeled off from the bottom without shaking and can be easily redispersed. Also, when the content of (a) fine particle silica is less than 2% by mass, the usability is good. The content of (a) fine particle silica in the powder-containing cosmetic is preferably 0.4% by mass or more and 1% by mass or less, and more preferably 0.4% by mass or more and 0.75% by mass or less.

[0019] (b) powder components (b) The powder components exclude the above-mentioned (a) fine particle silica. (b) Examples of the powder components include talc, kaolin, silica, zinc oxide, cellulose, octenyl succinic acid starch aluminum, zinc undecylenate, anhydrous silicic acid, magnesium silicate, mica, mica titanium, magnesium oxide, titanium dioxide, dried potassium aluminum sulfate, magnesium carbonate, and calcium carbonate. Among them, talc, silica, zinc oxide, cellulose, and octenyl succinic acid starch aluminum are more preferable.

[0020] (b) It is preferable that the powder components are not surface-treated by silicone treatment, fluorine treatment, amino acid treatment, lecithin treatment, ester treatment, polyethylene treatment, urethane treatment, metallic soap treatment, etc. The (b) powder components without surface treatment tend to sediment in the two-layer type powder cosmetic, but in the powder-containing cosmetic of the present invention, even the (b) powder components without surface treatment have the advantage of good redispersibility.

[0021] Also, there is no particular limitation on the particle shape of the (b) powder components to be used. Examples of the shape include various shapes such as flaky, scaly, plate-like, spherical, spindle-shaped, X-shaped, star-shaped, petal-shaped, sea urchin-shaped, ribbon-shaped, needle-shaped, hemispherical, and rod-shaped. In terms of preventing white residue, shapes such as flaky, scaly, plate-like, and rod-shaped are preferable, and spherical, plate-like, flaky, and scaly are particularly preferable.

[0022] (b) The size of the powder component is preferably such that the average particle diameter exceeds 0.1 μm and is 600 μm or less, more preferably 0.3 μm or more and 140 μm or less, and still more preferably 1 μm or more and 80 μm or less. The measuring method for the average particle diameter is the laser diffraction / scattering method.

[0023] The content of the (b) powder component in the powder-containing cosmetic is preferably 5% by mass or less, more preferably 3% by mass or less, and still more preferably 1% by mass or less. When the content of the (b) powder component is 5% by mass or less, by using it in combination with (a) fine particle silica, the redispersibility becomes good, there is no powdery feeling, and the usability is excellent.

[0024] ((b) / (a)) In the powder-containing cosmetic of the present invention, (b) / (a) indicating the content ratio of (a) fine particle silica and (b) powder component is 5 or less. Further, the content ratio (b) / (a) is preferably 3 or less, and more preferably 2.8 or less. When the content ratio (b) / (a) is 5 or less, excellent redispersibility can be achieved while improving usability.

[0025] (c) Hydrophilic solvent (c) The hydrophilic solvent contains at least one of water and lower alcohol. Examples of the lower alcohol include ethyl alcohol and isopropyl alcohol. One or more of these can be used. The content of the (c) hydrophilic solvent in the powder-containing cosmetic is preferably 80% by mass or more and 99% by mass or less. Further, when containing a lower alcohol, the content of the lower alcohol in the powder-containing cosmetic is preferably 30% by mass or more and 95% by mass or less, and more preferably 40% by mass or more and 80% by mass or less.

[0026] (d) Nonionic surfactant The (d) nonionic surfactant in the powder-containing cosmetic has an organic value of 1300 or more and an inorganic value of 1900 or more. By using such a (d) nonionic surfactant, aggregation of powder components can be prevented, and thus the redispersibility becomes good. Examples of the (d) nonionic surfactant include polyoxyethylene hydrogenated castor oils such as PEG-30 hydrogenated castor oil, PEG-35 hydrogenated castor oil, PEG-40 hydrogenated castor oil, PEG-45 hydrogenated castor oil, PEG-50 hydrogenated castor oil, PEG-55 hydrogenated castor oil, and PEG-60 hydrogenated castor oil; polyoxyethylene alkyl ethers such as steareth-25, steareth-30, steareth-40, ceteareth-25, ceteareth-27, ceteareth-30, ceteareth-40, ceteareth-50, ceteareth-55, ceteareth-60, ceteth-25, ceteth-30, ceteth-45, oleth-25, oleth-30, oleth-40, oleth-50, octyldodeceth-25, isosteareth-25, and isoceteth-25; polyoxyethylene and polyoxypropylene alkyl ethers such as PPG-26 buteth-26, PPG-28 buteth-35, PPG-30 buteth-30, PPG-6 decyltetradeceth-30, PPG-33 buteth-45, PPG-36 buteth-36, and PPG-38 buteth-37; and other ether ester types such as PEG-25BG isostearate, PEG-65BG isostearate, glyceryl PEG-25 oleate, glyceryl PEG-30 oleate, sorbitan PEG-40 oleate, PEG-35 stearate, PEG-45 stearate, PEG-50 stearate, and PEG-75 stearate.

[0027] The content of the (d) nonionic surfactant in the powder-containing cosmetic is preferably 0.05% by mass or more and 1% by mass or less, more preferably 0.05% by mass or more and 0.5% by mass or less, and still more preferably 0.05% by mass or more and 0.2% by mass or less. When the content of the (d) nonionic surfactant in the powder-containing cosmetic is within the above range, the redispersibility becomes good.

[0028] (e) polymer (e) Examples of polymers include plant polymers such as gum arabic, locust bean gum, tragacanth, galactan, carob gum, guar gum, karaya gum, carrageenan, xanthan gum, pectin, agar, quince seed (marmelo), algocolloid (brown seaweed extract), microbial polymers such as gellan gum, dextran, succinoglucan, pullulan, animal polymers such as collagen, casein, albumin, gelatin, starch polymers such as starch (rice, corn, potato, wheat), carboxymethyl starch, methylhydroxypropyl starch, and the like.

[0029] Also included are cellulose polymers such as methyl cellulose, nitrocellulose, ethyl cellulose, hydroxypropyl methyl cellulose, hydroxyethyl cellulose, sodium cellulose sulfate, hydroxypropyl cellulose, sodium carboxymethyl cellulose, crystalline cellulose, cellulose powder, etc., alginic acid polymers such as sodium alginate, propylene glycol alginate, and the like.

[0030] Furthermore, vinyl polymers such as polyvinyl methyl ether, carboxyvinyl polymer, polyoxyethylene polymers, polyoxyethylene polyoxypropylene copolymer polymers, acrylic polymers such as polyethyl acrylate, polyacrylamide, inorganic water-soluble polymers such as polyethyleneimine, cationic polymer, bentonite, magnesium aluminum silicate, laponite, hectorite, silicic anhydride, PEG-240 / decyltetradeceth-20 / hexamethylene diisocyanate copolymer, (dimethylacrylamide / acryloyldimethyltaurine Na) cross-polymer, (sodium acrylate / acryloyldimethyltaurine) copolymer, (alkyl acrylate / stearyl methacrylate-20) copolymer, (acryloyldimethyltaurine ammonium / VP) copolymer, and the like.

[0031] Among them, cellulose polymers such as crystalline cellulose, methyl cellulose, ethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxypropyl methyl cellulose, sodium carboxymethyl cellulose; natural polymers such as gellan gum, carrageenan, guar gum, locust bean gum, gum arabic, xanthan gum, dextran, succinoglucan are preferred.

[0032] The content of the (e) polymer in the powder-containing cosmetic is preferably 0.1% by mass or more and 0.4% by mass or less, and more preferably 0.1% by mass or more and 0.3% by mass or less. When the content of the (e) polymer in the powder-containing cosmetic is 0.5% by mass or more, the feeling of use due to stickiness deteriorates, and when it is less than 0.1% by mass, there is almost no viscosity, resulting in dripping of the liquid during application.

[0033] (f) Water-soluble salt Examples include chlorohydroxyaluminum, zinc parahydroxysulfonate, aluminum chloride, aluminum sulfate, aluminum citrate, aluminum acetate, basic aluminum chloride, aluminum phenolsulfonate, aluminum β-naphtholdisulfonate, sodium perborate, aluminum zirconium octachlorohydrate, aluminum zirconium pentachlorohydrate, aluminum zirconium tetrachlorohydrate, aluminum zirconium trichlorohydrate, zirconium chlorohydrate, allantoin chlorohydroxyaluminum, basic aluminum bromide, aluminum naphthalenesulfonate, basic aluminum iodide, zinc oxide and the like. These can be used alone or in combination of two or more. The content of the (f) water-soluble salt in the powder-containing cosmetic is preferably 0% by mass or more and 30% by mass or less, more preferably 1% by mass or more and 20% by mass or less, and still more preferably 1% by mass or more and 5% by mass or less.

[0034] (Other components) The powder-containing cosmetic of the present invention can contain a bactericide and a humectant as other components.

[0035] Examples of the bactericide include benzalkonium chloride, β-glycyrrhetinic acid, triclosan, o-cymen-5-ol, trichlorocarbanilide, benzethonium chloride, alkyltrimethylammonium chloride, resorcinol, phenol, sorbic acid, salicylic acid, hexachlorophene, chlorhexidine gluconate, chlorhexidine hydrochloride, glyceryl caprylate, ethylhexylglycerin, silver-supported zeolite, silver-supported silica, and the like. Two or more of these may be used.

[0036] Examples of the humectant include polyols such as glycerin, PG (propylene glycol), and BG (butylene glycol); and ethylene oxide polymers such as PEG (polyethylene glycol)-8.

[0037] The powder-containing cosmetic of the present invention can be used as pharmaceuticals, quasi-drugs, cosmetics, deodorants, sunscreens, face powders, and the like.

Examples

[0038] Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples. Tables 1 to 3 show the compounding amounts of the respective components in the examples and comparative examples, and the evaluation results of the powder-containing cosmetics. The units in the tables indicate mass% unless otherwise specified. Details of each component described in the table are shown below.

[0039] (a) Fine particle silica · Hydrophilic fumed silica, average primary particle size 12 nm (b) Powder component · Silica (spherical, 5 μm, oil absorption amount: 300 mL / 100 g) · Silica (spherical, 5 μm, oil absorption amount: 60 mL / 100 g) · Zinc oxide · Cellulose · Talc · Aluminum octenyl succinate starch (c) Hydrophilic solvent · 95% Ethanol · Purified water (d) Nonionic surfactant · PEG-60 hydrogenated castor oil · Steareth-25 · PPG-6 decyltetradeceth-30 · Octyldodeceth-25 · PEG-20 methyl glucose sesquistearate · PEG-7 dimethicone · Polyoxyethylene stearyl ether / Steareth-3 (e) Polymer · Hydroxypropyl cellulose · Hydroxypropyl methylcellulose · Xanthan gum (f) Water-soluble salt · Zinc phenolsulfonate · Chlorhydroxyaluminum (Other components) · o-Cymen-5-ol · PEG-8

[0040] [Examples 1 to 26, Comparative Examples 1 to 12] With the formulations shown in Tables 1 to 3, (a) fine particle silica and (c) hydrophilic solvent were dispersed with a disper, and then other components were added and stirred.

[0041] [Evaluation] For the examples and comparative examples prepared as described above, evaluation was carried out by the following method.

[0042] (Caking degree) The sample was left standing in a permeable plastic container at room temperature for 1 month, and the remaining ratio of the powder deposited on the bottom when it was slowly inverted was visually evaluated. A: All or almost all of the powder has disappeared at the bottom. B: More than half of the powder has disappeared from the bottom. C: More than half of the powder remains at the bottom. D: Almost the state where powder remains at the bottom

[0043] (Redispersibility) Samples of the powder-containing cosmetic were left standing at room temperature for 1 month and evaluated. With the container upside down, it was shaken under the following conditions, and the number of times the powder completely peeled off from the bottom was recorded. Shaking speed: 2 times / s, amplitude: 20 cm A: 1 or more and 20 or less times B: 21 or more and 50 or less times C: 51 or more times

[0044] (Usability) Five panelists applied the powder-containing cosmetics of the examples and comparative examples to their arms and evaluated the usability according to the following evaluation criteria. A: Good B: Slightly good C: Slightly bad D: Bad

[0045]

Table 1

[0046]

Table 2

[0047]

Table 3

[0048] As shown in Tables 1 to 3, it can be seen that Examples 1 to 26 have a small degree of caking of the powder component precipitated at the bottom of the container and are excellent in redispersibility and usability. (d) Comparative Example 1 that does not contain a nonionic surfactant, and Comparative Examples 2 to 4 in which the inorganic value and organic value of the (d) nonionic surfactant deviate from the present invention are inferior in redispersibility. In addition, Comparative Example 6 with a low content of particulate silica, and Comparative Examples 5, 7 to 9, 11, and 12 where the content ratio of (a) particulate silica and (b) powder component deviates from the present invention also have poor redispersibility. Furthermore, Comparative Example 10 with a high content of (a) particulate silica is inferior in usability.

[0049] [Formulation Example] Hereinafter, formulation examples of the powder-containing cosmetic of the present invention will be given. The present invention is not limited by these formulation examples.

[0050] (Formulation Example 1: Sunscreen) Hydrophilic fumed silica: 0.3% by mass Talc: 0.2% by mass Iron oxide: 0.1% by mass Titanium oxide: 0.2% by mass Steareth-25: 0.2% by mass Ethylhexyl methoxysilicate: 0.5% by mass Hydroxyethylcellulose: 0.1% by mass BG (1,3-butylene glycol): 2% by mass Chamomile BG extract: 0.1% by mass Olive leaf BG extract: 0.1% by mass Ethanol: 80% by mass Fragrance: 0.2% by mass Purified water: balance

[0051] (Formulation Example 2: Deodorant) Hydrophilic fumed silica: 0.4% by mass Silica (spherical, 3 μm, oil absorption: 150 mL / 100 g): 0.3% by mass Silica (spherical, 5 μm, oil absorption: 300 mL / 100 g): 0.3% by mass Steareth-25: 0.15% by mass Zinc phenolsulfonate: 0.2% by mass o-Cymen-5-ol: 0.1% by mass Hydroxypropylmethylcellulose: 0.15% by mass PEG-8: 1.5% by mass Black tea water extract: 0.1% by mass 0.1% by mass of burdock root BG extract 0.1% by mass of elm bark BG extract 0.3% by mass of menthol 0.2% by mass of menthoxypropanediol 75% by mass of ethanol 0.2% by mass of fragrance The balance is purified water

[0052] (Formulation Example 3: Deodorant) 1% by mass of hydrophilic fumed silica 5% by mass of dried potassium aluminum sulfate 0.2% by mass of PEG-60 hydrogenated castor oil 0.1% by mass of o-cymen-5-ol 0.15% by mass of hydroxypropyl cellulose 0.1% by mass of sweet tea BG extract 0.1% by mass of green tea BG extract 0.5% by mass of menthol The balance is ethanol 0.1% by mass of fragrance

[0053] As described above, the preferred embodiments of the present invention have been described in detail. However, the present invention is not limited to the above-described embodiments, and various modifications and changes are possible within the scope of the gist of the present invention described in the claims.

Claims

1. (a) fine particle silica, (b) a powder component (excluding the fine particle silica of (a)), (c) a hydrophilic solvent, and (d) a nonionic surfactant which contains, wherein the content of the fine particle silica of (a) is 0.25% by mass or more and less than 2% by mass, wherein (b) / (a) indicating the content ratio of the fine particle silica of (a) and the powder component of (b) is 5 or less, and the nonionic surfactant of (d) is a powder-containing cosmetic having an organic value of 1300 or more and an inorganic value of 1900 or more.

2. The powder-containing cosmetic according to Claim 1, wherein the average primary particle diameter of the fine particle silica of (a) is 1 nm or more and 100 nm or less.

3. The powder-containing cosmetic according to Claim 1, wherein the hydrophilic solvent of (c) contains at least one of water and a lower alcohol.

4. The powder-containing cosmetic according to Claim 1, wherein the content of the powder component of (b) is 5% by mass or less.

5. The powder-containing cosmetic according to Claim 1, wherein the content of the nonionic surfactant of (d) is 0.05% by mass or more and 1% by mass or less.

6. The powder-containing cosmetic according to Claim 1, further containing (e) a polymer, wherein the polymer of (e) is at least one selected from hydroxypropyl cellulose, hydroxypropyl methylcellulose, and xanthan gum.

7. The powder-containing cosmetic according to Claim 1, further containing (f) a water-soluble salt, wherein the water-soluble salt of (f) is at least one of zinc phenolsulfonate and chlorohydroxyaluminum.

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