Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/96—Cosmetics or similar toiletry preparations characterised by the composition containing materials, or derivatives thereof of undetermined constitution
  • A61K8/97—Cosmetics or similar toiletry preparations characterised by the composition containing materials, or derivatives thereof of undetermined constitution from algae, fungi, lichens or plants; from derivatives thereof
  • A61K8/9783—Angiosperms [Magnoliophyta]
  • A61K8/9789—Magnoliopsida [dicotyledons]
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
  • A61Q1/00—Make-up preparations; Body powders; Preparations for removing make-up
  • A61Q1/14—Preparations for removing make-up

Definitions

• the present invention relates to a solid oil-based cleansing cosmetic.
• oil-based cleansing cosmetics are used, which blend well with makeup (the cosmetic film on the skin) and have excellent performance (stain removal) in removing dirt such as keratin and sebum.
• Specific examples of oil-based cleansing cosmetics include cleansing oil, gel-type cleansing agents, and cleansing creams.
• oil-based cleansing cosmetics that are solid at room temperature have the advantage that they do not drip when used and are easy to massage when blending with makeup.
• Patent Document 1 discloses a soap composition containing matcha, and states that matcha is suitable as a scrubbing agent because it is not hard and has a moderate texture (paragraph 0004). The document also states that there is no discoloration even one month after production, but because a soap composition formulation inevitably comes into contact with water during use, it is inevitable that the matcha will react with moisture and discolor or fade after even one use.
• Patent Document 2 describes that when (A) 1-30% by mass of solid oil with a melting point of 50-120°C, (B) 50-97% by mass of liquid oil, (C) 3-30% by mass of nonionic surfactant with HLB value of 5-13, (D) 0.1-20% by mass of powder with a volume average particle size of 1-200 ⁇ m, and (E) 0.01-10% by mass of fumed silica (based on the total cosmetic composition), an oil-based solid cleansing cosmetic product that is easy to wash off and leaves a refreshing feeling after washing off can be obtained. It also describes that when clay minerals or charcoal powder is used as the powder of component (D), a cleansing cosmetic product that is excellent in dirt removal and refreshing feeling can be obtained (paragraph 0006). However, when such inorganic powders are used, although the dirt removal ability is improved, there is a problem that the product is hard on the skin and removes too much sebum and oil, which easily leads to dry skin.
• the present invention was completed against this background, and its purpose is to provide an oil-based solid cleansing cosmetic that improves the cleansing performance of the cosmetic, is gentle on the skin, and exhibits vibrant colors due to naturally derived ingredients, without causing stability problems such as discoloration.
• an oil-based solid cleansing cosmetic product containing a high melting point solid oil, liquid oil, a nonionic surfactant with a specific HLB value, as well as tea leaf powder and fumed silica, and with a water content of 0.5% by mass or less, satisfies the above requirements, leading to the completion of the present invention.
• an oil-based solid cleansing cosmetic that contains (A) a solid oil component having a melting point of 50 to 120°C, (B) a liquid oil component, (C) a nonionic surfactant having an HLB value of 5 to 13, and (D) tea leaf powder, and has a water content of 0.5% by mass or less (standard for all cosmetics).
• the oil-based solid cleansing cosmetic of the present invention has excellent cleansing performance and is gentle on the skin, and while it exhibits vivid colors due to the use of naturally derived ingredients, it also has excellent stability.
• the solid oil of component (A) is a solid oil at room temperature (25°C), and its melting point is 50 to 120°C, preferably 55 to 105°C, and more preferably 60 to 100°C.
• the melting point of the solid oil can be measured by melting point measurement method 2, which is a general test method of the Quasi-Drug Raw Materials Standard. As the melting point becomes lower, the composition becomes softer and easier to remove with fingers when used as a cleansing cosmetic, and the operation at room temperature when melting is easier, so that oxidative deterioration of components (B) and (C) is less likely to occur.
• the melting point becomes higher, it becomes easier to uniformly solidify the liquid oil of component (B), and the oil-based solid cleansing cosmetic is less likely to liquefy due to vibration or impact during transportation or carrying, and has good shape retention and can maintain its solid shape.
• solid oils include hydrocarbon waxes such as paraffin wax, polyethylene wax, ethylene-propylene copolymer, microcrystalline wax, ceresin, ozokerite, and Fischer-Tropsch wax, as well as wax, carnauba wax, candelilla wax, rice wax, sunflower seed wax, beeswax (beeswax), hydrogenated jojoba oil, behenyl behenate, hardened oils, higher alcohols, and silicone wax.
• hydrocarbon waxes such as paraffin wax, polyethylene wax, ethylene-propylene copolymer, microcrystalline wax, ceresin, ozokerite, and Fischer-Tropsch wax, as well as wax, carnauba wax, candelilla wax, rice wax, sunflower seed wax, beeswax (beeswax), hydrogenated jojoba oil, behenyl behenate, hardened oils, higher alcohols, and silicone wax.
• paraffin waxes such as Paraffin Wax 135, Paraffin Wax 140, Paraffin Wax 150, and HNP-11 manufactured by Nippon Seiro Co., Ltd.
• microcrystalline waxes such as HNP-9, Hi-Mic-2065, Hi-Mic-1070, Hi-Mic-1080, Hi-Mic-1090, and HNP-0190 manufactured by Nippon Seiro Co., Ltd., and Multiwax W-4 manufactured by Sonneborn.
• polyethylene waxes such as PERFORMALENE 400, PERFORMALENE 500, and PERFORMALENE 655 from NEW PHASE TECHNOLOGIES
• synthetic waxes such as CIREBELLE 108 and CIREBELLE 305 from CIREBELLE
• candelilla waxes such as refined candelilla wax No. 1 and Candelilla NC1630 from Ceramic NODA, refined candelilla wax CG-7 and refined candelilla wax SR-3 from Yokoseki Oil Industry, refined candelilla wax CG-7 and refined candelilla wax SR-3 from Japan Natural Products, high melting point candelilla wax FR100 from Japan Natural Products, and behenyl behenate from Riken Vitamin.
• Oil-based solid cleansing cosmetics differ greatly from oil-based solid cosmetics in makeup cosmetics such as lipstick in that they are packed in large volumes, and it is necessary to maintain the composition in a molten state for a long period of time during the process of filling the composition into a specified container. For this reason, waxes that have excellent stability against oxidation when heated are preferred as solid oils, and specifically, hydrocarbon waxes, especially polyethylene wax and Fischer-Tropsch wax, are preferably used. Also preferably used is behenyl behenate, a synthetic wax ester.
• the above-mentioned (A) component may be a single compound, or two or more compounds may be used in appropriate combination.
• the content of the (A) component is preferably 1 to 30% by mass, more preferably 2 to 20% by mass, and particularly preferably 3 to 15% by mass, based on the total oil-based solid cosmetic.
• the cosmetic is easier to pick up with your fingers, spreads well when used, and is easier to massage, but is more likely to liquefy due to vibration or impact.
• shape retention improves, making it easier to produce a stick-shaped oil-based solid cleansing cosmetic.
• the content of the (A) component is preferably 5 to 30% by mass based on the total cosmetic, which allows particularly good shape retention to be obtained.
• liquid oil In the oil-based solid cleansing cosmetic of the present invention, a liquid oil (B) is used from the viewpoints of compatibility with makeup on the skin and ease of spreading when applied to the skin.
• liquid oil means oil that has fluidity at room temperature (25°C) and semi-solid oil with a melting point of less than 50°C, and also includes volatile oil with a boiling point of less than 260°C.
• the liquid oil (B) used in the present invention is not particularly limited as long as it is used in ordinary cosmetics, and may be any of animal oil, vegetable oil, and synthetic oil.
• Specific examples of liquid oil include triethylhexanoin, diisostearyl malate, diglyceryl triisostearate, decaglyceryl decaisostearate, oligomer ester of dimer acid and dimer diol, pentaerythritol tetraisostearate, diglyceryl tetraisostearate, cetyl isooctanoate, isopropyl myristate, isopropyl palmitate, octyldodecyl myristate, neopentyl glycol dioctanoate, cholesterol fatty acid ester, jojoba oil, and other esters; volatile isoparaffin, polybutene, polyisobutylene, heavy liquid isoparaffin, liquid paraffin, ⁇ -
• the content of (B) liquid oil is preferably 50-95% by mass, more preferably 55-95% by mass, and even more preferably 60-90% by mass, of the entire oil-based solid cosmetic.
• a nonionic surfactant having an HLB value in the range of 5 to 13 is used as component (C).
• a nonionic surfactant having an HLB value in the range of 5 to 13 means one type of nonionic surfactant having an HLB value in the range of 5 to 13, a combination of multiple nonionic surfactants having HLB values in that range, or a combination of two or more nonionic surfactants having different HLB values, resulting in a weighted average HLB value in the range of 5 to 13.
• HLB is an index showing the balance between hydrophilicity and lipophilicity, with a value between 0 and 20, with the closer to 0 the higher the lipophilicity, and the closer to 20 the higher the hydrophilicity.
• the HLB value of the nonionic surfactant is less than 5, even if makeup is applied to the skin with the cleansing cosmetic and then rinsed off with cold or lukewarm water, it will not be able to be washed off cleanly due to poor compatibility with water, and no refreshing feeling will be obtained after rinsing. Conversely, if the HLB value exceeds 13, hydrophobic makeup will not be able to be blended with the cleansing cosmetic, and makeup removal will be insufficient. In particular, an HLB value in the range of 6 to 11 provides good makeup removal and ease of rinsing.
• the nonionic surfactant of component (C) may be either solid or liquid, but using a nonionic surfactant that is liquid at 25°C will provide better performance in terms of makeup removal and ease of rinsing off.
• nonionic surfactants with an HLB value of 5 to 13 used as component (C), and nonionic surfactants whose HLB value falls within the above range when used in combination include polyglycerin fatty acid esters such as polyglyceryl-4 stearate, polyglyceryl-2 oleate, polyglyceryl-2 isostearate, and polyglyceryl-10 distearate; polyoxyethylene hydrogenated castor oils such as PEG-10 hydrogenated castor oil and PEG-20 hydrogenated castor oil; polyoxyethylene fatty acid esters such as PEG-2 stearate and PEG-5 stearate; polyoxyethylene alkyl esters such as ceteth-2, oleth-3, and steareth-6.
• polyglycerin fatty acid esters such as polyglyceryl-4 stearate, polyglyceryl-2 oleate, polyglyceryl-2 isostearate, and polyglyceryl-10 distearate
• polyoxyethylene hydrogenated castor oils such as PEG
• esters fatty acid polyoxyethylene alkyl ethers such as steareth-6 stearate, laureth-8 isostearate, and steareth-12 stearate; polyoxyethylene fatty acid glyceryls such as PEG-3 glyceryl isostearate, PEG-15 glyceryl tristearate, PEG-5 glyceryl triisostearate, PEG-10 glyceryl triisostearate, PEG-20 glyceryl triisostearate, and PEG-20 glyceryl tristearate; fatty acid polyoxyethylene hydrogenated castor oils such as PEG-15 hydrogenated castor oil isostearate and PEG-20 hydrogenated castor oil triisostearate; etc.
• polyoxyethylene fatty acid glyceryls such as PEG-3 glyceryl isostearate, PEG-15 glyceryl tristearate, PEG-5 glyceryl triisostearate, PEG-10 glyceryl triisostearate, PEG-20
• sorbitan fatty acid esters examples include sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene polyoxypropylene copolymers, ethers of polyoxyethylene polyoxypropylene copolymers and long-chain alcohols, and ethers of polybutylene glycol polyglycerin copolymers and long-chain alcohols.
• polyoxyethylene fatty acid esters, polyoxyethylene fatty acid glyceryl, fatty acid polyoxyethylene hydrogenated castor oil, and fatty acid polyoxyethylene alkyl ethers are preferably used from the viewpoints of makeup removal and ease of rinsing.
• the nonionic surfactant used as component (C) has a fatty acid residue in the molecule
• the fatty acid residue is preferably a residue of a higher fatty acid having 10 to 22 carbon atoms, such as myristic acid, palmitic acid, stearic acid, isostearic acid, or oleic acid, and among these, it is preferable that the nonionic surfactant be a residue of a branched higher fatty acid that has excellent oxidation stability and is in a liquid state, and isostearic acid residue is particularly preferable.
• liquid nonionic surfactants used as component (C) include, for example, EMALEX RWIS-320 (PEG-20 hydrogenated castor oil triisostearate; manufactured by Nippon Emulsion Co., Ltd.; HLB 6), EMALEX GWIS-305 (PEG-5 glyceryl triisostearate; manufactured by Nippon Emulsion Co., Ltd.; HLB 3), and UNIOX GT-20IS (PEG-20 glyceryl triisostearate; manufactured by Nippon Emulsion Co., Ltd.; HLB 4).
• EMALEX RWIS-320 PEG-20 hydrogenated castor oil triisostearate; manufactured by Nippon Emulsion Co., Ltd.; HLB 6
• EMALEX GWIS-305 PEG-5 glyceryl triisostearate; manufactured by Nippon Emulsion Co., Ltd.; HLB 3
• UNIOX GT-20IS PEG-20 glyceryl triisostearate; manufactured by Nippon Em
• Emalex GWS-320 PEG-20 glyceryl tristearate; Nippon Emulsion Co., Ltd.; HLB 8
• Emalex SWS-12 steareth-12 stearate; Nippon Emulsion Co., Ltd.; HLB 8
• Emalex 608 steareth-8; Nippon Emulsion Co., Ltd.; HLB 9
• the amount of component (C) used is preferably 3 to 40% by mass of the total composition, more preferably 4 to 35% by mass, even more preferably 5 to 30% by mass, and particularly preferably 7 to 25% by mass.
• the lower this amount is, the less irritation there is to the skin. Conversely, the higher the amount is, the easier it is to remove makeup and rinse off.
• component (D: Tea leaf powder) in addition to the above components (A) to (C), powdered tea leaves (D) are used.
• component (D) provides a soft feel on the skin and improves cleansing performance such as makeup removal and dirt removal due to the scrubbing effect.
• the vivid colors of various tea leaves can be imparted to cosmetics without using synthetic colorants.
• Tea leaves are the leaves of the tea plant (scientific name: Camellia sinensis (L.) Kuntze), and in this specification also include varieties of the tea plant such as Assam tea (scientific name: Camellia sinensis (L.) Kuntze var. assamica (J.W. Mast.) Kitam.).
• Assam tea scientific name: Camellia sinensis (L.) Kuntze var. assamica (J.W. Mast.) Kitam.
• tea leaves known depending on the processing method (presence or absence of enzyme reaction, timing and method of killing green tea, drying method, etc.), and any of them may be used.
• Specific examples include green tea, black tea, white tea, yellow tea, oolong tea, and black tea. Of these, green tea powder and black tea powder are preferably used because they provide vivid colors.
• Green tea is made from the leaves of the tea plant by heat-treating the picked tea leaves to prevent the enzyme reaction in the tea leaves (known as "fermentation” in the tea industry), and has a green (yellow-green to blue-green) color.
• green tea is not particularly limited as long as it is tea leaves produced in this way, and includes, but is not limited to, sencha, gyokuro, kabusecha, sayha, tencha, matcha, etc.
• Black tea is made by withering (drying) the leaves of the tea plant, Assam tea, or hybrids of these, kneading them, fermenting them completely, and then drying them; it has a reddish-brown color.
• tea leaf powder refers to tea leaves that have been made into a powder form, and can be produced by using tea leaves as is or by crushing them.
• the average particle size is preferably 0.01 to 100 ⁇ m, more preferably 0.1 to 80 ⁇ m, and particularly preferably 1 to 50 ⁇ m.
• the average particle size is measured as the volume-based median size using a laser diffraction/scattering particle size distribution measuring device (e.g., LA-950 manufactured by Horiba, Ltd.) and a sample that has been ultrasonically dispersed for 5 minutes using caprylic/capric triglyceride as a solvent, and does not refer to the primary particle size.
• the ultrasonic dispersion process is performed using an ultrasonic cleaner W-113 (manufactured by Hyundai Electronics Co., Ltd.) at a frequency of 28 kHz.
• the green tea powder is preferably matcha, and commercially available matcha can be used as is or after crushing and sorting.
• Examples of commercially available matcha include Fukujuen Matcha (for cosmetics) sold by Fukujuen Co., Ltd. and Uji no Gocha M sold by Dainippon Kasei Co., Ltd.
• An example of commercially available black tea powder is black tea powder sold by Tomizawa Shoten Co., Ltd.
• the amount of component (D) is preferably 0.01 to 20% by mass, more preferably 0.1 to 15% by mass, and even more preferably 1 to 10% by mass, based on the total cosmetic composition. When component (D) is contained within this range, the dirt removal properties and massage effect are improved, and the burden on the skin is reduced.
• the composition further contains fumed silica as component (E).
• fumed silica as component (E).
• a process is required in which the composition in a uniformly mixed molten state is filled into a specified container, and then cooled and solidified.
• a composition containing tea leaf powder as component (D) if the composition filled into the container solidifies quickly, the dispersion state of the powder can be maintained uniformly.
• makeup cosmetics such as lipstick generally weigh a few grams, so the time from filling to solidification is extremely short, and there is little risk of the dispersibility of the powders contained in the composition being impaired.
• the weight per product is generally about 100 grams or more, so even if the container filled with the composition is cooled from the outside with cold air, it takes a long time for the powders to solidify, and during that time, the powders may settle or aggregate.
• tea leaf powder it is easy for it to aggregate when dispersed in oil, and it is easy for the appearance to be non-uniform.
• component (E) it is possible to obtain a cosmetic product with a more uniform appearance.
• the amount of component (E) blended is preferably 0.01 to 10% by mass, more preferably 0.1 to 5% by mass, and even more preferably 0.2 to 3% by mass, based on the total cosmetic material.
• the mass ratio of component (E) to the tea leaf powder (D) [(E)/(D)] is preferably 0.01 to 10, and more preferably 0.05 to 5.
• the fumed silica of component (E) is a fine amorphous silica also called fumed silica, and has a fluffy, light, white powder appearance. Fumed silica can be obtained, for example, by high-temperature hydrolysis of a raw material such as silicon tetrachloride in an oxyhydrogen flame.
• the specific surface area of the fumed silica is preferably 30 m 2 /g or more, more preferably 50 to 400 m 2 /g, and particularly preferably 100 to 400 m 2 /g. If the specific surface area is too small, it is not possible to effectively suppress the settling of component (D) when the blend is melt-filled in the manufacturing process of the cleansing cosmetic.
• the primary particle size of these fumed silica particles is preferably 1 to 50 nm, and more preferably 2 to 30 nm.
• the primary particle size can be determined as the average value of 3,000 to 5,000 particles measured using an electron microscope photograph, and can be confirmed from the catalog of the fumed silica manufacturer.
• Component (E) may be untreated fumed silica that exhibits hydrophilicity, or fumed silica that has been subjected to a hydrophobic treatment.
• hydrophobic treatments include dimethyldichlorosilane treatment, trimethylsiloxy treatment using trimethylsilyl chloride or hexamethyldisilazane, octylsilane treatment, dimethylsilicone oil treatment, coating and baking treatment using methylhydrogenpolysiloxane, and coating with metal soap.
• component (D) a component that is a component that is a component that is a component that is aggregation of component (D) and facilitate obtaining a more uniform appearance
• it is preferable to contain both untreated and hydrophobized fumed silica and the mass ratio of untreated fumed silica to hydrophobized fumed silica (untreated/hydrophobized ratio) is preferably 1/9 to 9/1.
• component (E) Commercially available products of component (E) include untreated fumed silica such as AEROSIL 50, AEROSIL 130, AEROSIL 200, AEROSIL 200V, AEROSIL 200CF, AEROSIL 200FAD, AEROSIL 300, AEROSIL 300CF, AEROSIL 380, and AEROSIL 380S (all manufactured by Nippon Aerosil Co., Ltd.); and hydrophobically treated products such as AEROSIL R972, Examples include AEROSIL R972V, AEROSIL R972CF, AEROSIL R974, AEROSIL R976S, AEROSIL RX200, AEROSIL RX300, AEROSIL RY200, AEROSIL R202, AEROSIL R805, AEROSIL R812, AEROSIL RA200H (all manufactured by Nippon Aerosil Co., Ltd.), and CAB-O-SIL TS530 (manufactured by Cabot Corporation).
• the water content is 1% by mass or less, preferably 0.5% by mass or less, and more preferably 0.3% by mass or less. If the water content falls within this range, the color of (D) the tea leaf powder will maintain its vividness and will be less susceptible to discoloration.
• the oil-based solid cleansing cosmetic of the present invention contains tea leaf powder (D), which provides a scrubbing effect that feels good on the skin, but also provides an aesthetic effect in that the cosmetic exhibits the vivid color of tea leaves without using synthetic dyes.
• the external color tone of the oil-based solid cleansing cosmetic of the present invention is preferably such that the hue (H) is 5YR-5G and the chroma (C) is 2 or more in the Munsell color system.
• the hue (H) is preferably 7.5Y-5G and the chroma (C) is 3 or more in the Munsell color system, and more preferably the hue (H) is 10Y-2.5G and the chroma (C) is 4 or more.
• the hue (H) is preferably 5YR-10Y and the chroma (C) is preferably 2 or more, and more preferably the hue (H) is 10YR-5Y and the chroma (C) is 3 or more.
• the hue (H) and chroma (C) can be evaluated by comparison with the Munsell color chart, and can also be determined from the color measurement value using a color difference meter (for example, the NW-12 color whiteness meter manufactured by Nippon Denshoku Industries Co., Ltd.).
• the oil-based solid cleansing cosmetic of the present invention contains tea leaf extract in addition to tea leaf powder (D), allowing users to enjoy the vivid color of tea leaves and the physiologically active effects of tea leaves.
• the tea leaf extract is preferably a green tea extract.
• the extraction solvent may be either water-soluble or oil-soluble.
• physiologically active effects it is preferable for the extract to have antioxidant and anti-aging effects.
• commercially available products of tea leaf extract derived from green tea include Tea Extract (B)-BG and Tea Extract (O)-SQ, etc., manufactured by Maruzen Pharmaceutical Co., Ltd.
• the oil-based solid cleansing cosmetic of the present invention can contain ingredients used in ordinary cosmetics, such as additives such as powders other than component (D), dyes, oil-based gelling agents, oil-soluble resins, polyhydric alcohols, lower alcohols, ultraviolet absorbers, ultraviolet scattering agents, moisturizers, fragrances, antioxidants, preservatives, defoamers, and various extracts, to the extent that the effects of the present invention are not impaired.
• additives such as powders other than component (D)
• dyes such as powders other than component (D)
• oil-based gelling agents such as oil-based gelling agents, oil-soluble resins, polyhydric alcohols, lower alcohols, ultraviolet absorbers, ultraviolet scattering agents, moisturizers, fragrances, antioxidants, preservatives, defoamers, and various extracts
• the oil-based solid cleansing cosmetic of the present invention does not exhibit fluidity at room temperature (25°C) and normal pressure (1 atm), and its shape is not particularly limited. Specific examples of shapes include stick, rod, plate, and those poured into containers.
• These various cleansing cosmetic compositions can be prepared according to standard methods. For example, all the raw materials are heated to above their melting point and mixed uniformly, and then poured in the molten state into a specified container such as a jar container, or into a metal or resin dish, and cooled or allowed to cool to produce an oil-based solid cleansing cosmetic. It can also be filled into a stick container to form a stick shape.
• the oil-based solid cleansing cosmetic of the present invention has the properties required for a massage cosmetic, namely, appropriate viscosity, slipperiness, and the persistence of slipperiness, in addition to the function of removing makeup. Therefore, it can be used as a massage cosmetic in addition to the oil-based solid cleansing cosmetic of the present invention.
• the makeup can be removed by blending the cosmetic with the makeup and then rinsing it off with water or lukewarm water. Therefore, when using conventional oil-based solid cleansing cosmetics, it is possible to omit the face washing operation with a face wash such as soap, which was thought to be necessary after use.
• a cleansing agent to remove dirt such as sebum that has accumulated on skin without makeup.
• Examples 1 to 4 and Comparative Examples 1 to 3 Oil-based solid cleansing cosmetic
• the oil-based solid cleansing cosmetic compositions with the formulations shown in Table 1 were prepared according to the following manufacturing procedure. In these formulations, two types of nonionic surfactants with different HLB values were used in combination as component (C), and the weighted average HLB value of the combination was 8.8.
• the oil-based solid cleansing cosmetic compositions obtained were evaluated by the above-mentioned method for ease of makeup removal, refreshing feeling after rinsing, lack of irritation during massage, uniformity of appearance, hue and saturation, and color stability. The evaluation results are shown in Table 1.
• the oil-based solid cleansing cosmetic of the present invention is excellent in terms of its performance as a cleansing cosmetic, such as its ability to remove makeup, its refreshing feeling after rinsing, and its lack of irritation during massage, and is also aesthetically excellent due to its vivid color tone and excellent color stability (Examples 1 to 4).
• the makeup removal and refreshing feeling performance was insufficient (Comparative Example 1), and when it contained 1.5% by mass of water, the color stability was significantly inferior (Comparative Example 2).
• it contained clay, an inorganic mineral, instead of tea leaf powder a irritating feeling was felt during the massage action to blend the makeup (Comparative Example 3).
• Example 5 Oil-based solid cleansing cosmetic
• the oil-based solid cleansing cosmetic compositions with the formulations shown in Table 2 were prepared according to the following manufacturing procedure. In these formulations, two nonionic surfactants with different HLB values were used in combination as the (C) component, and the weighted average HLB value of the combination was 8.8.
• the oil-based solid cleansing cosmetic compositions obtained were evaluated by the above-mentioned method for makeup removal, refreshing feeling after washing off, lack of irritation during massage, uniformity of appearance, hue and saturation, and color stability. The evaluation results are shown in Table 2.
• the oil-based solid cleansing cosmetic of the present invention is excellent in terms of its performance as a cleansing cosmetic, such as its ability to remove makeup, its refreshing feeling after rinsing, and its lack of irritation during massage, and is also aesthetically pleasing due to its excellent color tone and color stability.
• the present invention provides an oil-based solid cleansing cosmetic that has excellent cleansing performance, is gentle on the skin, and has a vivid color tone due to the use of natural ingredients.

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  • 2023-03-30 JP JP2023055268A patent/JP2024142885A/ja active Pending
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