Cleansing cosmetics

Abstract

To provide cleansing cosmetics which can remove stains in pores with high cleansing power, and with a high removal rate of keratin; give a refresh feeling during rinsing; and also have high-temperature stability and photo-stability.SOLUTION: Cleansing cosmetics comprise following components (A), (B), (C) and (D): (A) a clay mineral, (B) a polymer thickener, (C) a nonionic surfactant with an HLB of 9 or more, and (D) water.SELECTED DRAWING: None

Description

[[Technical Field]]

[0001] The present invention relates to a cleansing cosmetic. [[Background Art]]

[0002] Conventionally, various cleansing cosmetics for removing sebum dirt and makeup cosmetics on the skin have been studied. For example, Patent Document 1 describes that a cleansing cosmetic containing tris(trimethylsiloxy)methylsilane, a polymer thickener, and a nonionic surfactant with an HLB of 9 or more is excellent in cleansing effect, feeling of use, and refreshing feeling after use. Patent Document 2 describes that a detergent composition containing a nonionic surfactant and a water-swellable clay mineral has low irritation to the skin, high detergency against makeup cosmetics and sebum dirt, and good rinsing properties. Patent Document 3 describes that a cleansing cosmetic consisting of an emulsion containing water, a nonionic surfactant, and an oil has extremely low irritation and is excellent in the effect of removing makeup cosmetics with improved durability. [[Prior Art Documents]] [[Patent Documents]]

[0003] [[Patent Document 1]] Japanese Unexamined Patent Publication No. 2012-180305 [[Patent Document 2]] Japanese Unexamined Patent Publication No. 10-45565 [[Patent Document 3]] Japanese Unexamined Patent Publication No. 2005-187355 [[Summary of the Invention]] [[Problems to be Solved by the Invention]]

[0004] However, conventional cleansing cosmetics have not been sufficiently satisfactory in terms of detergency against dirt that has entered pores. In addition, there are also problems in high-temperature stability and light stability. [Means for solving the problem]

[0005] The inventors of the present invention have discovered that by using a combination of clay minerals, a polymeric thickener, and a nonionic surfactant with an HLB of 9 or higher, a cleansing cosmetic can be obtained that has excellent cleansing power against dirt in pores, a high rate of exfoliation, a refreshing feeling upon rinsing, and good high-temperature and light-stability, thereby completing the present invention.

[0006] The present invention comprises the following components (A), (B), (C), and (D): (A) Clay minerals, (B) Polymer thickeners, (C) Nonionic surfactants with HLB 9 or higher, (D)Water This relates to cleansing cosmetics containing [specific ingredient]. [Effects of the Invention]

[0007] The cleansing cosmetic of the present invention has excellent cleansing power against dirt in pores and a high rate of exfoliation, provides a refreshing feeling when rinsing, and also exhibits good high-temperature stability and light stability. [Brief explanation of the drawing]

[0008] [Figure 1] This diagram shows the evaluation criteria for the cleansing power against pores in the examples. [Modes for carrying out the invention]

[0009] Examples of clay minerals used as component (A) in the present invention include bentonite (including natural and synthetic bentonite), montmorillonite (including natural and synthetic montmorillonite), beidelite, nontronite, laponite, souconite, hectorite (including natural and synthetic hectorite), smectite group clay minerals such as stivunsite from Moroccan lava clay, kaolin such as rhyolite powder, vermiculite, swellable synthetic fluorinated mica (Na-type, Li-type synthetic mica), swellable mica, and marine mud (marine sediments) such as Tanakura clay. Of these, from the viewpoint of improving cleansing power against dirt in pores, improving the rate of exfoliation, improving the refreshing feeling during rinsing, and improving high-temperature stability, it is preferable to include one or more selected from kaolin, smectite clay minerals, and sea mud; more preferably to include one or more selected from kaolin and sea mud; even more preferably to include one or more selected from kaolin and tanakura clay; and even more preferably to include kaolin and tanakura clay simultaneously.

[0010] Furthermore, the clay mineral of component (A) is preferably number-average particle size of 0.1 to 500 μm, more preferably 0.3 to 300 μm, and even more preferably 0.5 to 100 μm, from the viewpoint of improving the cleansing power against dirt in pores, improving the rate of exfoliation, and improving the refreshing feeling during rinsing. In this invention, the number-average grain size is measured using an image analysis method. Specifically, when observing clay minerals using an electron microscope (HITACHI, Miniscope TM3030Plus), 20 to 50 arbitrary clay minerals are selected, their longest diameter is measured by direct observation, and the number-average grain size is determined.

[0011] As component (A), commercially available products such as kaolin-based 2457 kaolin (Brenntag Specialties, Inc., number average particle size: 0.6 μm), Moroccan lava clay Ghassoul M (Ghassoul Japan Jamila Co., Ltd., number average particle size: 100 μm), rhyolite powder Matera Powder 60 μm Under (Matera Co., Ltd., number average particle size: 60 μm), and Tanakura clay Mironecton R (Dainippon Kasei Co., Ltd., number average particle size: 10 μm) can be used.

[0012] Component (A) can be one or more types, and its content is preferably 0.5 to 9% by mass, more preferably 2 to 5% by mass, and even more preferably 2.5 to 3.5% by mass, from the viewpoint of improving cleansing power against dirt in pores, improving the rate of exfoliation, and improving the refreshing feeling when rinsing.

[0013] Examples of polymeric thickeners for component (B) used in the present invention include carboxyvinyl polymers and alkyl-modified carboxyvinyl polymers, which may be alkyl-modified; polyacrylamide compounds such as polyacrylamide and (sodium acrylate / acryloyldimethyl taurine) copolymer; and polysaccharides such as xanthan gum, carrageenan, cellulose, hydroxyethylcellulose, carboxymethylcellulose, and starch.

[0014] Among these, improve the cleansing power against dirt in pores and improve the rate of exfoliation. From the viewpoint of improving the refreshing feeling during rinsing, improving high-temperature stability, and improving light stability, it is preferable to include one or more selected from alkyl-modified carboxyvinyl polymers and polyacrylamide compounds, more preferably to include one or more selected from carboxyvinyl polymers and alkyl-modified carboxyvinyl polymers, and even more preferably to include a carboxyvinyl polymer. Of the alkyl-modified carboxyvinyl polymers, copolymers of acrylic acid and alkyl (meth)acrylate are preferred, copolymers of acrylic acid and alkyl (meth)acrylate having an alkyl group with 8 to 30 carbon atoms are more preferred, and acrylic acid-alkyl methacrylate copolymers are even more preferred. For alkyl-modified carboxyvinyl polymers, commercially available products such as Syntalen K (manufactured by 3V Sigma), Carbopol 980, and Carbopol 981 (all manufactured by Lubrizol Advanced Materials) can be used as carboxyvinyl polymers, and commercially available products such as Pemlen TR-1, Pemlen TR-2, Carbopol EDT2020, and Carbopol 1382 (all manufactured by Lubrizol Advanced Materials), which are acrylic acid-alkyl methacrylate copolymers, can be used as alkyl-modified carboxyvinyl polymers.

[0015] One or more types of component (B) may be used. From the viewpoints of improving the detergency against dirt in pores, improving the keratin removal rate, improving the refreshing feeling during rinsing, improving high-temperature stability and improving light stability, the content of component (B) is preferably 0.01 to 2% by mass based on the total composition, more preferably 0.05 to 0.8% by mass, and even more preferably 0.4 to 0.6% by mass.

[0016] In the present invention, from the viewpoints of improving the detergency against dirt in pores, improving the keratin removal rate, improving the refreshing feeling during rinsing, improving high-temperature stability and improving light stability, the mass ratio (A) / (B) of component (A) to component (B) is preferably 1 to 40, more preferably 2.5 to 20, and even more preferably 4 to 8.

[0017] The nonionic surfactant as component (C) has an HLB of 9 or higher, preferably 10 to 18, more preferably 10.5 to 16, and even more preferably 11 to 15. Here, HLB (Hydrophilic-Lipophilic Balance) is calculated by Griffin's formula (J. Soc. Cosmet. Chem., 1, 311 (1949); 5, 249 (1953)). In the present invention, when two or more nonionic surfactants are used in combination, it is only required that the mixed HLB obtained by summing the values obtained by multiplying each individual HLB by the respective mass proportion thereof is 9 or higher.

[0018] The nonionic surfactant as component (C) is not limited as long as it is a nonionic surfactant having an HLB of 9 or higher, and examples thereof include polyethylene glycol fatty acid esters, polyoxyethylene glyceryl fatty acid esters, polyglyceryl fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene sorbitol fatty acid esters, polyoxyethylene castor oil, polyoxyethylene hydrogenated castor oil, and polyoxyethylene alkyl ethers.

[0019] Of these, it is preferable to include one or more selected from polyoxyethylene glyceryl fatty acid esters and polyoxyethylene hydrogenated castor oil, and more preferably to include polyoxyethylene hydrogenated castor oil, from the viewpoint of improving the refreshing feeling during rinsing, improving high temperature stability, and improving light stability. In the present invention, when polyoxyethylene glyceryl fatty acid ester and polyoxyethylene hydrogenated castor oil are used in combination, the mass ratio of polyoxyethylene glyceryl fatty acid ester to polyoxyethylene hydrogenated castor oil (polyoxyethylene glyceryl fatty acid ester) / (polyoxyethylene hydrogenated castor oil) is preferably 0.1 to 4, more preferably 0.15 to 1.5, even more preferably 0.2 to 1, and still more preferably 0.3 to 0.7, from the viewpoint of improving the refreshing feeling during rinsing and improving high-temperature stability.

[0020] Component (C) can consist of one or more types, and its content is preferably 0.5 to 10% by mass, more preferably 2 to 7% by mass, and even more preferably 4 to 6% by mass, from the viewpoint of improving the cleansing power against dirt in pores and improving the refreshing feeling when rinsing.

[0021] In the present invention, the mass ratio (A) / (C) of component (A) to component (C) is preferably 0.1 to 7, more preferably 0.25 to 4, and even more preferably 0.4 to 1, from the viewpoint of improving cleansing power against dirt in pores, improving the rate of exfoliation, improving the refreshing feeling during rinsing, improving high temperature stability, and improving light stability.

[0022] In the present invention, the water content of component (D) is preferably 15 to 60% by mass, more preferably 20 to 50% by mass, and even more preferably 25 to 40% by mass, from the viewpoint of improving the refreshing feeling during rinsing and improving high-temperature stability.

[0023] The cleansing cosmetic composition of the present invention may further contain (E) titanium dioxide, which can enhance photostability. From the viewpoint of improving photostability, the titanium dioxide has a number-average particle size of 0.1 to 1 μm, more preferably 0.2 to 0.5 μm, and even more preferably 0.2 to 0.35 μm. The shape of the titanium dioxide can be spherical, plate-shaped, needle-shaped, or any other shape. Specifically, commercially available titanium dioxide products such as JR-701 (manufactured by Teika Co., Ltd., number average particle size: 0.27 μm), MP-25 (manufactured by Teika Co., Ltd., number average particle size: 0.25 μm), ST-710EC (manufactured by Titanium Industry Co., Ltd., number average particle size: 0.3 μm), ST-750EC (manufactured by Titanium Industry Co., Ltd., number average particle size: 1 μm), and Typeque CR-50 (manufactured by Ishihara Sangyo Co., Ltd., number average particle size: 0.25 μm) can be used. The titanium dioxide content of component (E) is preferably 0.05 to 8% by mass, more preferably 0.2 to 3% by mass, and even more preferably 0.3 to 1% by mass, from the viewpoint of improving the refreshing feeling during rinsing and improving photostability.

[0024] In the present invention, the mass ratio (A) / (E) of component (A) to component (E) is preferably 0.1 to 50, more preferably 0.3 to 22, and even more preferably 0.5 to 10, from the viewpoint of improving the refreshing feeling during rinsing and improving photostability.

[0025] The cleansing cosmetic composition of the present invention may contain, in addition to the above-mentioned components, components commonly used in ordinary cleansing compositions, such as surfactants other than component (C), powders other than components (A) and (E), polymer compounds other than component (B), oily components, polyhydric alcohols, bactericides, anti-inflammatory agents, preservatives, chelating agents, fragrances, cooling agents, antioxidants, plant extracts, etc., to the extent that the effects of the present invention are not impaired.

[0026] The cleansing cosmetic composition of the present invention can be manufactured according to conventional methods, for example, by the following steps. Step I: A step of uniformly mixing component (C) and an oil phase component containing an optional oil-soluble component as needed to obtain a prepared product (i). Step II: A step to obtain preparation (ii) by uniformly mixing component (B), component (D), an aqueous medium, and an aqueous phase component containing any optional water-soluble component. Step III: Add the dispersion (i) and component (A) obtained in Step I to the preparation (ii) obtained in Step II, mix uniformly, and emulsify to obtain a cleansing cosmetic.

[0027] The cleansing cosmetic composition of the present invention preferably has a viscosity at 20°C of 10,000 to 400,000 mPa·s, more preferably 50,000 to 200,000 mPa·s, and even more preferably 80,000 to 150,000 mPa·s, from the viewpoint of improving cleansing power against dirt in pores, improving the rate of exfoliation, improving the refreshing feeling during rinsing, improving high-temperature stability, and improving light stability. In this invention, viscosity is measured under the following conditions. Measuring instrument: Digital viscometer TVB-10R model (manufactured by Toki Sangyo Co., Ltd.) Rotation speed: 5 rpm, Measurement time: 60s Measurement temperature: 20℃

[0028] The cleansing cosmetic composition of the present invention can be used as a skin cleansing cosmetic composition, and is particularly suitable for removing makeup. [Examples]

[0029] Examples 1-12 and Comparative Examples 1-2 Cleansing cosmetics with the compositions shown in Table 1 were manufactured, and their viscosity at 20°C was measured. The cleansing power against pore impurities, the refreshing feeling upon rinsing, the rate of exfoliation, high-temperature stability, and photostability were also evaluated. The results are shown in Table 1.

[0030] (Manufacturing method) Step I: The component (C) and the oil phase component are uniformly mixed to obtain the preparation (i). Step II: Mix component (B), component (D), and aqueous phase component uniformly to obtain preparation (ii). Step III: The preparation (ii) obtained in Step II was mixed uniformly with the preparation (i) obtained in Step I, components (A) and (E), and emulsified to obtain a cleansing cosmetic.

[0031] (Evaluation method) (1) Viscosity: The viscosity of each cleansing cosmetic product immediately after manufacturing was measured using a digital viscometer, model TVB-10R (manufactured by Toki Sangyo Co., Ltd.), under the following measurement conditions. Rotation speed: 5 rpm Measurement time: 60s Measurement temperature: 20℃

[0032] (2) Cleansing power against pore dirt: Kate Stick Concealer A (manufactured by Kanebo Cosmetics) was applied evenly to a square cheek skin model urethane plate (manufactured by Beaulax, 3D pore skin model, No. 351-001). After drying for 15 minutes, 0.3g of each cleansing cosmetic was taken, blended 30 times with the fingers, and then rinsed with water and dried. Photographs of the areas where the cleansing cosmetic was applied were taken and evaluated on a 5-point scale by three cosmetic evaluation panelists, comparing them to the standard sample shown in Figure 1. The results are shown as the total scores from the three panelists.

[0033] (3) Refreshing feeling during rinsing: Three cosmetic evaluation panelists applied 3g of each cleansing cosmetic to their entire face, massaged it in, and then rinsed it with water. They evaluated the refreshing feeling after rinsing on a 5-point scale based on the following criteria. The results are shown as the total score from the three panelists. 5: Clearly good. 4: Good. 3: Fairly good. 2: Defective. 1: Clearly defective.

[0034] (4)Exfoliation rate: 0.1g of each cleansing cosmetic was applied to a 3cm x 3cm area on the inner side of the forearm, and massaged 50 times. After rinsing with water and drying, tape was applied to the application area, and dead skin cells were collected. Similarly, dead skin cells were collected on tape after rinsing with water and drying without using any cleansing cosmetics. The tapes from which the stratum corneum was collected were observed using a digital microscope (equipment used: KEYENCE VHX-5000), and the proportion of stratum corneum in the images was analyzed. The proportion of stratum corneum collected by tape stripping with and without the application of cleansing cosmetics was compared to calculate the extent to which stratum corneum was removed. A higher exfoliation rate indicates that the exfoliation process by the cleansing cosmetic product has removed more dead skin cells. The calculation was performed using the following formula. • Percentage of dead skin cells removed when cleansing cosmetics are applied [Dead skin cells (applied)] • Percentage of dead skin cells removed when no cleansing cosmetic was applied [Dead skin cells (no application)] Exfoliation rate (%) = {1 - ([Exfoliated cells (with application)] / [Exfoliated cells (without application)])} × 100

[0035] (5) High temperature stability: Each cleansing cosmetic was filled into a glass bottle (model number PS-6K, manufactured by Daiichi Glass Co., Ltd.), stored at 50°C for one month, then returned to 20°C, and its appearance was visually evaluated after 12 hours. ○: No separation ×: Separation available

[0036] (6) Photostability: Each cleansing cosmetic was filled into a glass bottle (model number PS-6K, manufactured by Daiichi Glass Co., Ltd.), and its appearance was evaluated visually after being irradiated for 5 days using a xenon weather meter (manufactured by Suga Test Instruments Co., Ltd.) according to the following criteria. ◎: No change from immediately after manufacturing. ○: Viscosity decreased slightly, but overall there was almost no change. △: Viscosity has decreased slightly, but there are no problems with use. ×: Viscosity has clearly decreased, causing problems with use, or separation has occurred.

[0037] [Table 1]

[0038] Prescription Examples 1-3 A cleansing cosmetic with the following composition was manufactured. All of the resulting cleansing cosmetics exhibit excellent cleansing power against dirt in pores, a high rate of exfoliation, a refreshing feeling upon rinsing, and good high-temperature and light-stable properties.

[0039] Prescription Example 1 (Cleansing Cream): Kaolin 3.0 (mass%) Tanakura Clay (*1) 0.5 Carboxyvinyl polymer (*2) 0.4 Polyoxyethylene (40) hydrogenated castor oil (*3) 4.0 Polyoxyethylene (20) glyceryl triisostearate (*4) 1.0 Charcoal (*5) 0.1 Titanium dioxide (*22) 1.0 Methyltrimethicone 20.0 Mineral oil 15.0 1,3-Butylene glycol 5.0 Glycerin 5.0 Diglycerin 5.0 Himenobotan extract (*6) 0.1 Rehmannia glutinosa root extract (*7) 0.1 Licorice root extract (*8) 0.1 Swertia japonica extract (*9) 0.1 Japanese pepper peel extract (*10) 0.1 Phenoxyethanol 0.2 Potassium hydroxide (appropriate amount) Water level remaining Total 100

[0040] Prescription Example 2 (Cleansing Gel): Kaolin 3.0 (mass%) Talc 1.0 Moroccan lava clay (*11) 0.5 Carboxyvinyl polymer (*2) 0.5 Polyoxyethylene (40) hydrogenated castor oil (*3) 3.0 Polyoxyethylene (20) glyceryl triisostearate (*4) 2.0 Titanium dioxide (*23) 0.5 Methyltrimethicone 30.0 (C14-22) Alkane (*12) 10.0 Dipropylene glycol 5.0 Glycerin 5.0 Sorbitol 5.0 Lactobacillus / pear juice ferment filtrate (*13) 0.1 Hamamelis leaf extract (*14) 0.1 Sage leaf extract (*15) 0.1 Apricot juice (*16) 0.1 Phenoxyethanol 0.2 Potassium hydroxide (appropriate amount) Water level remaining Total 100

[0041] Prescription Example 3 (Cleansing Milk): Kaolin 3.0 (mass%) Talc 0.5 Mica 0.5 Acrylic acid / alkyl methacrylate copolymer (*17) 0.2 Polyoxyethylene (40) hydrogenated castor oil (*3) 4.0 Polyoxyethylene (20) glyceryl triisostearate (*4) 1.0 Methyltrimethicone 10.0 Squalane 20.0 Olive oil 1.0 Titanium dioxide (*24) 1.0 1,3-Butylene glycol 5.0 Glycerin 5.0 Malva sylvestris flower extract (*18) 0.1 Soy milk fermented liquid (*19) 0.1 Water-soluble collagen (*20) 0.1 Sodium hyaluronate (*21) 0.01 Glycine 0.001 Proline 0.001 Alanine 0.001 Phenoxyethanol 0.2 Potassium hydroxide (appropriate amount) Water level remaining Total 100

[0042] *1: Tanakura Clay: Mironecton R (manufactured by Dainippon Kasei Co., Ltd.) *2: Carboxyvinyl polymer: Syntalen K (manufactured by 3V Sigma Corporation) *3: Polyoxyethylene (40) hydrogenated castor oil: NIKKOL HCO-40 (manufactured by Nippon Surfactant Industry Co., Ltd.) *4: Polyoxyethylene (20) glyceryl triisostearate: M Fine Oil ISG-20T (manufactured by Miyoshi Oil Co., Ltd.) *5: Charcoal: Bamboo charcoal powder MM (manufactured by Cooperative Association Latest), *6: Himenobotan extract: Kinkinko extract 70 (manufactured by Maruzen Pharmaceutical Co., Ltd.) *7: Rehmannia glutinosa root extract: Falcorex Rehmannia (manufactured by Ichimaru Falcos Co., Ltd.) *8: Licorice root extract: Licorice extract (manufactured by Maruzen Pharmaceutical Co., Ltd.) *9: Swertia japonica extract: Swertinogen KM (manufactured by Maruzen Pharmaceutical Co., Ltd.) *10: Japanese pepper peel extract: Falcorex Japanese pepper (manufactured by Ichimaru Falcos Co., Ltd.) *11: Moroccan lava clay: Ghassoul M (manufactured by Ghassoul Japan Jamila Co., Ltd.) *12: (C14-22) Alkan: Lilac (manufactured by Sonneborn) *13: Lactobacillus / Pear Juice Ferment Filtrate: Fermentage Pear B (manufactured by Ichimaru Falcos Co., Ltd.) *14: Hamamelis leaf extract: Hamamelis liquid (manufactured by Ichimaru Falcos Co., Ltd.) *15: Sage leaf extract: Salvia extract BG-J (manufactured by Maruzen Pharmaceutical Co., Ltd.) *16: Apricot juice: Apricot extract K (manufactured by Koei Kogyo Co., Ltd.) *17: Acrylic acid / alkyl methacrylate copolymer: PEMULEN TR-1 (manufactured by Lubrizol Corporation) *18: Mallow flower extract: Mallow extract BG (manufactured by Maruzen Pharmaceutical Co., Ltd.) *19: Soy milk fermented liquid: Soy milk fermented liquid (manufactured by Sansei Pharmaceutical Co., Ltd.) *20: Water-soluble collagen: Neptigen N (manufactured by Ichimaru Falcos Co., Ltd.) *21: Sodium hyaluronate: Hyaluronic acid FCH (FCH-SU) (manufactured by Kikkoman Biochemifa Co., Ltd.) *22: Titanium dioxide: ST-710EC (number average particle size 0.3 μm, manufactured by Titanium Industries Co., Ltd.) *23: Titanium dioxide: ST-750EC (number average particle size 1.0 μm, manufactured by Titanium Industries Co., Ltd.) *24: Titanium dioxide: Typake CR-50 (number average particle size 0.25 μm, manufactured by Ishihara Sangyo Co., Ltd.)

Claims

1. The following components (A), (B), (C), and (D): (A) 0.5 to 9% by mass of clay minerals containing one or more selected from kaolin and tanakura clay. (B) Carboxyvinyl polymer which may be alkyl-modified: 0.01 to 2% by mass, (C) 0.5 to 10% by mass of a nonionic surfactant with an HLB of 9 or higher, containing one or more selected from polyoxyethylene glyceryl fatty acid esters and polyoxyethylene hydrogenated castor oil. (D) Water A cleansing cosmetic containing [ingredient].

2. The cleansing cosmetic composition according to claim 1, wherein the mass ratio (A) / (B) of component (A) to component (B) is 1 to 40.

3. A cleansing cosmetic composition according to claim 1 or 2, wherein the mass ratio (A) / (C) of component (A) to component (C) is 0.1 to 7.

4. Furthermore, the cleansing cosmetic composition according to any one of claims 1 to 3, further comprising (E) titanium dioxide.

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