阅读说明：本技术 油性固态清洁化妆品 (Oily solid cleansing cosmetic ) 是由 汤浅隆太 内田和希 秋月祐介 于 2019-08-06 设计创作，主要内容包括：本发明的课题在于,提供一种没有清洁化妆品的滴落、清洁力及按摩效果高、冲洗容易度和冲洗后的清爽感优异、并且品质的稳定性(外观及组成的均匀性)优异的固态油性清洁化妆品。解决方法是一种油性固态清洁化妆品,其以下述比例(化妆品总量中的比例)含有：(A)熔点为50～120℃的固态油分1～30质量％、(B)液态油分50～95质量％、(C)HLB值为5～13的非离子性表面活性剂3～40质量％、(D)粉末状摩洛哥溶岩粘土0.1～20质量％、以及(E)气相二氧化硅0.1～10质量％。(The present invention addresses the problem of providing a solid, oily cleansing cosmetic that does not drip off from the cleansing cosmetic, has high cleansing power and massage effect, is excellent in ease of rinsing and refreshing feel after rinsing, and has excellent stability of quality (uniformity in appearance and composition). The solution is an oily solid cleansing cosmetic which contains the following components in the following proportion (proportion in the total amount of the cosmetic): (A) 1 to 30 mass% of solid oil having a melting point of 50 to 120 ℃, (B) 50 to 95 mass% of liquid oil, (C) 3 to 40 mass% of a nonionic surfactant having an HLB value of 5 to 13, (D) 0.1 to 20 mass% of powdery moroccan lava clay, and (E) 0.1 to 10 mass% of fumed silica.)

1. An oily solid cleansing cosmetic comprising, in the following proportions (proportion in the total amount of the cosmetic):

(A) 1-30 mass% of solid oil with a melting point of 50-120℃,

(B) 50-95 mass% of liquid oil,

(C) 3 to 40 mass% of a nonionic surfactant having an HLB value of 5 to 13,

(D) 0.1 to 20 mass% of Morocco lava clay, and

(E) 0.1 to 10 mass% of fumed silica.

2. The oily solid cleansing cosmetic according to claim 1, wherein,

the morocco lava clay is used in combination with other clay minerals other than the morocco lava clay.

3. The oily solid cleansing cosmetic according to claim 1 or 2, wherein,

the component (E) has a specific surface area of 30m²(ii) fumed silica of more than g.

4. An oily solid cleansing cosmetic as claimed in any one of claims 1 to 3, which further contains water in an amount of 0.1 to 3% by mass as the (F) component.

5. The oily solid cleansing cosmetic according to any one of claims 1 to 4, wherein,

the component (A) is a hydrocarbon wax.

6. The oily solid cleansing cosmetic according to any one of claims 1 to 5, wherein,

the component (C) is a nonionic surfactant which is liquid at 25 ℃.

Technical Field

The present invention relates to a solid oily cleansing cosmetic.

Background

In recent years, products excellent in both water resistance and oil resistance have been developed for makeup cosmetics such as lipsticks, foundations, eye shadows, and mascaras, and the makeup retention property has been remarkably improved. Therefore, when makeup is removed using a makeup cosmetic, an oily cleansing cosmetic is used which has good adhesion to makeup (a cosmetic film on the skin) and excellent performance (soil removal properties) for removing dirt such as keratin and sebum. Specific examples of oily cleansing cosmetics include cleansing oils, gel-like cleansing agents, cleansing creams, and the like, and among these, oily cleansing cosmetics that are solid at room temperature have the advantage of being free from dripping during use and of being easy to massage when combined with color cosmetics, and their development has been intensively carried out.

Patent document 1 discloses that a cleansing cosmetic stick having excellent performance in removing skin dirt, pore-clogging dirt, blackhead, and the like is obtained by blending (a) a wax having a melting point of 30 to 60 ℃, (b) a wax having a melting point of 61 to 110 ℃, (c) an oil component which is liquid at room temperature, and (d) a powder component. However, patent document 1 only evaluates the removal performance of skin dirt, and does not disclose any cleaning of a makeup cosmetic using the makeup cosmetic. Further, there is no disclosure about washing the cleansing cosmetic with water or warm water.

Patent document 2 discloses that an oily solid cleansing cosmetic composition using a combination of a high-melting solid oil, a liquid oil and a nonionic surfactant does not drip during use, has a smooth and soft feeling in use, and is excellent in ease of adhesion to dirt and a refreshing feeling after rinsing. Patent document 3 discloses that a solid oily cleansing cosmetic composition containing (a) a hydrocarbon oil having a high melting point, (B) a liquid oil containing an ester oil as an essential component, and (C) a nonionic surfactant having an HLB value of 5 to 13 is excellent in the fusion with a color cosmetic, has an excellent cleansing effect, and is also excellent in use feeling such as a refreshing feeling after cleansing.

However, since an oily solid cleansing cosmetic is an oily formulation containing a solid oil, it is not satisfactory in terms of refreshing feeling after washing, and further improvement in cleansing properties (easiness of removal of makeup) is expected.

On the other hand, patent document 4 discloses an oily solid cosmetic composition containing an ethylene-propylene copolymer as a solid oil component and containing a specific ester oil and fumed silica, which is excellent in cosmetic retainability and excellent in glossiness and feeling in use. However, the oily solid cosmetic is used for eye cream, lipstick, lip balm, etc., and there is no disclosure about its use as a cleanser.

Documents of the prior art

Patent document

Patent document 1: japanese laid-open patent publication No. 2002-

Patent document 2: japanese patent laid-open No. 2001-213726

Patent document 3: japanese patent laid-open publication No. 2012-206974

Patent document 4: japanese laid-open patent publication No. 2006-69933

Disclosure of Invention

Problems to be solved by the invention

The present invention has been made under such background circumstances, and an object thereof is to provide an oily solid cleansing cosmetic which has more excellent cleansing properties, excellent ease of rinsing and refreshing feeling after rinsing, and stable product quality while maintaining the above-mentioned properties peculiar to oily solid cleansing cosmetics.

Means for solving the problems

The present inventors have intensively studied to solve the above problems, and as a result, they have found that an oily solid cleansing cosmetic composition containing a solid oil component having a high melting point, a liquid oil, a nonionic surfactant having a specific HLB value, and a specific powder and fumed silica at a specific ratio satisfies the above requirements, and have completed the present invention.

Thus, the present invention provides an oily solid cleansing cosmetic comprising, in the following proportions (based on the total cosmetic content):

(A) 1-30 mass% of solid oil with a melting point of 50-120℃,

(B) 50-95 mass% of liquid oil,

(C) 3 to 40 mass% of a nonionic surfactant having an HLB value of 5 to 13,

(D) 0.1 to 20 mass% of powdery morocco lava clay, and

(E) 0.01 to 10 mass% of fumed silica.

ADVANTAGEOUS EFFECTS OF INVENTION

The oily solid cleansing cosmetic of the present invention is solid, and therefore, does not drip the cleansing cosmetic, has high cleansing power and massage effect, is excellent in ease of rinsing and refreshing feeling after rinsing, and is excellent in stability of quality.

Detailed Description

(A: solid oil component)

In the present invention, the solid oil component (A) is an oil which is solid at normal temperature (25 ℃), and has a melting point of 50 to 120 ℃, preferably 55 to 105 ℃, and more preferably 60 to 100 ℃. The melting point of the solid oil component can be measured by method 2 of melting point measurement which is a general test method standard for raw materials of medical supplies for external use. When the melting point is too low, the liquid oil of component (B) cannot be uniformly solidified, and when the oily solid cleansing cosmetic is transported or carried, the composition becomes liquid due to vibration or impact, or the shape retention property is poor, and the solid shape cannot be maintained. On the other hand, if the melting point is too high, the composition becomes hard, and the finger-picking property is deteriorated when the composition is used as a cleansing cosmetic, and further, since the composition needs to be handled at a high temperature when the composition is melted, the component (B) and the component (C) are easily oxidized and deteriorated.

Specific examples of the solid oil include: paraffin wax, polyethylene wax, ethylene-propylene copolymer, microcrystalline wax, Ozokerite (Ceresin), Ozokerite (Ozokerite), hydrocarbon waxes such as Fischer-Tropsch wax, wood wax, carnauba wax, candelilla wax, rice wax, beeswax (pearl wax), hydrogenated jojoba oil, hardened oil, higher alcohols, and silicone wax.

As the commercially available products of these solid oils, paraffin 135, paraffin 140, paraffin 150, HNP-11, manufactured by Japan wax Seikagaku Kogyo, paraffin wax; examples of the microcrystalline wax include HNP-9, Hi-Mic-2065, Hi-Mic-1070, Hi-Mic-1080, Hi-Mic-1090, HNP-0190, and Multiwax W-445 available from Sonneborn; PERFORAMOLE 400, PERFORAMOLE 500, PERFORAMOLE 655 of NEW PHASE TECHNOLOGIES CORPORATION as polyethylene wax; cireblele 108, cireblele 305 from cireblele corporation as synthetic waxes (fischer-tropsch waxes); purified candelilla wax No.1 from Cerica NODA, candelilla wax NC1630, purified candelilla wax CG-7 from Wako fat industries, Ltd., purified candelilla wax SR-3, purified candelilla wax CG-7 from Nature Products, Japan, SR-3, and high melting point candelilla wax FR100 from Nature Products, Japan.

The oil-based solid cleansing cosmetic is significantly different from oil-based solid cosmetics such as lipstick in terms of large capacity, and it is necessary to keep the composition in a molten state for a long time in the step of filling the composition into a predetermined container. Therefore, as the solid oil component, a wax excellent in stability against oxidation during heating is preferable, and specifically, a hydrocarbon wax, particularly, a polyethylene wax and a fischer-tropsch wax are preferably used.

The component (A) may be selected from a single compound, or two or more compounds may be suitably used in combination. The content of the component (A) is 1 to 30% by mass, preferably 2 to 20% by mass, and more preferably 3 to 15% by mass based on the whole oily solid cosmetic. (A) When the amount of the component is too small, the shape retention property becomes insufficient and the composition is too soft, and the massage effect is lowered. On the other hand, too much amount of the rubber composition causes poor finger-picking ability and poor elongation at the time of use, making it difficult to massage. When an oily solid cleansing cosmetic in the form of a stick is produced, the amount of component (a) is preferably 5 to 30% by mass based on the total amount of the cosmetic, and thus particularly good shape retention can be obtained.

(B: liquid oil component)

In the oily solid cleansing cosmetic composition of the present invention, (B) a liquid oil component is used from the viewpoint of ease of fusion with a color cosmetic on the skin and ease of spreading when applied to the skin. Here, "liquid oil" refers to oil having fluidity at normal temperature (25 ℃) and semi-solid oil having a melting point of less than 50 ℃, and volatile oil having a boiling point of less than 260 ℃ is also included in the liquid oil.

The liquid oil component (B) used in the present invention is not particularly limited as long as it is a liquid oil component used in usual cosmetics, and may be any of animal oils, vegetable oils, and synthetic oils. Specific examples of the liquid oil component include: esters such as glycerol tri (ethylhexanoate), diisostearyl malate, diglyceryl triisostearate, decaglyceryl decaisostearate, oligomer esters of dimer acid and dimer alcohol, pentaerythritol tetraisostearate, diglyceryl tetraisostearate, cetyl isooctanoate, isopropyl myristate, isopropyl palmitate, octyldodecyl myristate, neopentyl glycol dicaprylate, cholesterol fatty acid esters, and jojoba oil; hydrocarbons such as volatile isoparaffin, polybutene, polyisobutylene, heavy liquid isoparaffin, liquid paraffin, α -olefin oligomer, squalane, and vaseline; olive oil, castor oil, mink oil, macadamia nut oil and other oils; fatty acids such as isostearic acid and oleic acid; higher alcohols such as oleyl alcohol and isostearyl alcohol; silicone oils such as low-polymerization degree dimethylpolysiloxane, cyclic silicone, high-polymerization degree dimethylpolysiloxane, methylphenylpolysiloxane, methyltrimethylpolysiloxane, octanoyltrimethylpolysiloxane, crosslinking type organopolysiloxane, fluorine-modified polysiloxane, and the like; fluorine-containing oils such as perfluoropolyether; lanolin derivatives such as lanolin, lanolin acetate, isopropyl lanolin fatty acid ester, and lanolin alcohol; and so on.

The content of the liquid oil component (B) is required to be 50 to 95% by mass, preferably 55 to 95% by mass, and more preferably 60 to 90% by mass, based on the whole oily solid cosmetic. (B) When the amount of the component is too small, the fusion with the makeup is poor, the elongation is lowered, and the massage is difficult. On the other hand, when the amount of component (B) is too large, the shape retention is deteriorated and the massage effect is also deteriorated.

(C: surfactant)

In the present invention, as the component (C), a nonionic surfactant having an HLB value within the range of 5 to 13 is used. Here, the "nonionic surfactant having an HLB value in the range of 5 to 13" means 1 kind of nonionic surfactant having an HLB value in the range of 5 to 13, a combination of plural kinds of nonionic surfactants having an HLB value in this range, or a combination of plural kinds of nonionic surfactants having a weighted average HLB value in the range of 5 to 13 as a result of combining 2 or more kinds of nonionic surfactants having different HLB values. Specific examples of the combination of nonionic surfactants having different HLB values include a combination of a nonionic surfactant having an HLB value in the range of 5 to 13 and a nonionic surfactant having an HLB value of less than 5.

The HLB is an index representing the balance between hydrophilicity and lipophilicity by a value of 0 to 20, and is closer to 0 indicating higher lipophilicity, and closer to 20 indicating higher hydrophilicity. Various calculation methods are known as a method for calculating the HLB value, and the value is described in a catalog or the like provided by a manufacturer. In the present specification, the HLB value of the nonionic surfactant is calculated by the method of Griffin (the sum of the formula weights of 20 × hydrophilic portion/molecular weight) described in "surfactant passage" page 307 (published by industrial book company, published in 1960) in the case where the nonionic surfactant is a commercially available product, and in the case where the nonionic surfactant is not a commercially available product.

When the HLB value of the nonionic surfactant is less than 5, even if the color cosmetic and the cleansing cosmetic are mixed on the skin and then rinsed with water or warm water, the color cosmetic cannot be rinsed cleanly because of poor mixing with water, and a refreshing feeling after rinsing cannot be obtained. On the contrary, when the HLB value exceeds 13, the hydrophobic makeup cannot be blended with the cleansing cosmetic, and makeup removal becomes insufficient. Wherein, when the HLB value is within the range of 6-11, the color cosmetics are easy to remove and wash. (C) The nonionic surfactant of the component (a) may be either solid or liquid, but when a nonionic surfactant that is liquid at 25 ℃ is used, more excellent performance can be obtained from the viewpoint of ease of removal of makeup and washing.

Specific examples of the nonionic surfactant having an HLB value of 5 to 13 used as component (C) and the nonionic surfactant having an HLB value falling within the above range by combined use include polyglyceryl fatty acid esters such as polyglyceryl stearate-4, polyglyceryl oleate-2, polyglyceryl isostearate-2, and polyglyceryl distearate-10; polyoxyethylene solidified castor oil 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 ethers such as ceteth-2, oleyl polyether-3 and stearyl polyether-6; fatty acid polyoxyethylene alkyl ethers such as steareth-6 stearate, laureth-8 isostearate and steareth-12 stearate; polyoxyethylene fatty acid glycerides 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; polyoxyethylene hardened castor oil fatty acid such as PEG-15 hydrogenated castor oil isostearate and PEG-20 hydrogenated castor oil triisostearate; and so on. Further, sorbitan fatty acid esters, polyoxyethylene polyoxypropylene copolymers, ethers of polyoxyethylene polyoxypropylene copolymers and long-chain alcohols, ethers of polybutylene glycol polyglycerol copolymers and long-chain alcohols, and the like can be cited. Among them, polyoxyethylene fatty acid esters, polyoxyethylene fatty acid glycerides, polyoxyethylene fatty acid hardened castor oils, and polyoxyethylene fatty alkyl ethers are preferably used from the viewpoint of ease of makeup removal and washing.

When 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, oleic acid, and the like, and among these, a residue of a branched higher fatty acid having a liquid state and excellent oxidation resistance is preferred, and an isostearic acid residue is particularly preferred.

As commercially available liquid nonionic surfactants used as component (C), there are, for example: EMALEX RWIS-320 (Triisostearic acid PEG-20 hydrogenated castor oil; manufactured by EMULSION Co., Ltd.; HLB 6), EMALEX GWIS-305 (Triisostearic acid PEG-5 glyceride; manufactured by EMULSION Co., Ltd.; HLB 3), UNIOX GT-20IS (Triisostearic acid PEG-20 glyceride; manufactured by Nichioil Co., Ltd.; HLB 10.4), and the like, and commercially available products which are solid at 25 ℃ include, for example: EMALEX GWS-320 (PEG-20 glyceryl tristearate; manufactured by EMULSION Co., Ltd.; HLB8), EMALEX SWS-12 (steareth-12 stearate; manufactured by EMULSION Co., Ltd.; HLB8), EMALEX 608 (steareth-8; manufactured by EMULSION Co., Ltd.; HLB 9), and the like.

(C) The amount of the component (B) is 3 to 40% by mass, preferably 4 to 35% by mass, more preferably 5 to 30% by mass, and particularly preferably 7 to 25% by mass based on the total composition. When the amount is too small, the ease of removal of color cosmetics and washing is reduced, and when too large, irritation to the skin may occur.

(D: Moloto lava clay in powder form)

In the present invention, in addition to the above components (a) to (C), powdered moroccan clay (D) may be used as a powder component. The morocco lava clay is a clay classified as montmorillonite produced in morocco, and has a volume average particle diameter of usually 10 to 30 μm, and is a substance showing a light dark green color. Moroccan lava clay has been known as a raw material for clay therapy such as mud bags since ancient times, and high adsorption force to dirt on the skin and effect of mineral components contained in the components on the skin are expected. The Morocco lava clay is commercially available from GHASSOUL JAPAN JAMIELA under the trade name GHASSOULM.

The amount of component (D) is 0.1 to 20% by mass, preferably 0.2 to 15% by mass, and more preferably 1 to 10% by mass, based on the total amount of the cosmetic. When the component (D) is contained in this range, the makeup removal and massage effects are improved, and the refreshing feeling after washing is improved. In the present invention, the moroccan clay may be used alone as a powder component, or other powder may be used as desired in place of a part of the moroccan clay.

The other powder that can replace part of the component (D) is not particularly limited as long as it is a powder that is usually blended in cosmetics, and any powder may be used as long as it has a volume average particle diameter of 1 to 200 μm, without limitation on the material (organic, inorganic, etc.), shape (spherical, needle-like, plate-like, etc.), particle structure (porous, non-porous, etc.). Among them, when the powder is porous and has a large specific surface area, it is preferably used because it has excellent performance of adsorbing color cosmetic stains. The volume average particle diameter is measured using a laser diffraction/scattering particle size distribution measuring apparatus (for example, LA-950 manufactured by horiba ltd.) and a sample obtained by subjecting 95 vol% of ethanol as a solvent to ultrasonic dispersion treatment for 5 minutes, and does not mean the primary particle diameter. The ultrasonic dispersion treatment was performed at a frequency of 28kHz using an ultrasonic cleaner W-113 (manufactured by Kyoto electronic Co., Ltd.).

As such other powders, for example: clay minerals such as talc, muscovite, synthetic mica, phlogopite, synthetic fluorophlogopite, sericite, zeolite, kaolin, bentonite, saponite, hectorite, natural clay, sea mud, and activated clay; inorganic oxides or salts such as silicic acid, anhydrous silicic acid (silica), magnesium silicate, magnesium aluminum silicate, calcium silicate, barium sulfate, magnesium carbonate, boron nitride, bismuth oxychloride, aluminum oxide, zirconium oxide, and hydroxyapatite; organic powders such as silicone powder, silicone elastic powder, polyurethane powder, cellulose powder, nylon powder, silk powder, PMMA powder, starch, polyethylene powder, lauroyl lysine, metal soap, and plant powder (apricot kernel, walnut kernel, glucomannan powder, etc.); carbon powder such as activated carbon, medicinal carbon, bamboo charcoal, etc.; and a composite or a granulated product thereof.

Among these, clay minerals and carbon powders are preferably used because they are excellent in refreshing feeling after removal of makeup and washing. The natural clay and sea mud as clay minerals are mixtures of kaolin, montmorillonite, mica and the like, and some standards may also be used for clay therapy because of the influence of the origin, kind and color on the efficacy, and thus, the satisfaction of users can be further improved. Specific examples of such natural clay and sea mud include barn clay, paullan mud, Sparclay (trade name) and Tersil (trade name) produced in brazil, Clargile (trade name) produced in french, and the like.

When a part of the component (D) is replaced with another powder, the proportion of the component (D) in the total powder component is 30% by mass or more, preferably 40 to 95% by mass, and more preferably 50 to 90% by mass. By using another powder in place of a part of the moroccan clay, that is, by using the moroccan clay in combination with another powder, the degree of removal of makeup and a feeling of freshness can be appropriately adjusted, and particularly when a clay mineral such as natural clay having various effects on the place of origin and the type is used in combination, the effect on the skin expected for the moroccan clay can be obtained in addition to the characteristics derived from another clay mineral.

In the present invention, fumed silica is further contained as the (E) component. When a cleansing cosmetic is produced from a composition containing a solid oil component, it is necessary to fill a predetermined container with the uniformly mixed composition in a molten state, and then to cool and solidify the composition. In the case of the complex of moroccan lava clay containing the component (D), if the complex filled in the container rapidly solidifies, the dispersed state of the powder can be uniformly maintained. For example, since makeup cosmetics such as lipstick generally weigh several grams, the time from filling to curing is extremely short, and there is little risk that the dispersibility of the moroccan clay contained in the composition is impaired. However, in the case of a cleansing cosmetic, since the weight per product is usually about 100 g or more than 100 g on average, even if a container filled with a composition is cooled from the outside with cold wind or the like, the time required for solidification is long, and during this time, the settlement of the moroccan lava clay may be caused. If the powder component is precipitated, the powder component is unevenly dispersed, and the content of the powder component is deviated in the vertical direction of the cosmetic. As a result, the appearance of the cosmetic is impaired, and the stability of the quality is also impaired.

The amount of component (E) is 0.01 to 10% by mass, preferably 0.1 to 5% by mass, and more preferably 0.2 to 3% by mass, based on the total amount of the cosmetic. The mass ratio [ (E)/(D) ] of the component (E) to the component (D) is preferably 0.01 to 10, more preferably 0.05 to 5. (E) When the amount of the component (D) is in the above range, the dispersion state of the component (D) contained in the cosmetic material is improved, and the component (D) can be effectively prevented from settling when the composition is melt-filled in the production process of the cleansing cosmetic.

(E) The fumed silica of component (a) is fine amorphous silica also called fumed silica, and is a soft pale white powder in appearance. Fumed silica can be obtained by hydrolyzing a raw material such as silicon tetrachloride in an oxyhydrogen flame at a high temperature. The fumed silica preferably has a specific surface area of 30m²More than g, and more preferably 50 to 400m²A specific preferred range is 100 to 400m²(ii) in terms of/g. When the specific surface area is too small, the precipitation of the component (D) cannot be effectively suppressed when the compound is melt-filled in the production process of a cleansing cosmetic.

The primary particle size of these fumed silicas is preferably 50nm or less, particularly preferably 20nm or less. The primary particle size can be determined as an average value of 3000 to 5000 particles measured by an electron micrograph. (E) The component (B) may be untreated fumed silica exhibiting hydrophilicity or may be fumed silica subjected to hydrophobization treatment. Specific examples of the hydrophobization treatment include dimethyldichlorosilane treatment, trimethylsiloxy treatment with trimethylchlorosilane or hexamethyldisilazane, octylsilanization treatment, dimethylsilicone oil treatment, coating and sintering treatment using methylhydrogenpolysiloxane, coating with a metal soap, and the like. Among these fumed silicas, untreated fumed silicas are preferred from the viewpoint of ease of rinsing.

Commercially available products of component (E) include, for example, AEROSIL 50, AEROSIL 130, AEROSIL 200V, AEROSIL 200CF, AEROSIL 200FAD, AEROSIL 300CF, AEROSIL 380, and AEROSIL 380S (see above, manufactured by Japan AEROSIL Co., Ltd.); AEROSIL R972, AEROSIL R972V, AEROSIL R972CF, AEROSIL R974, AEROSIL R976S, AEROSIL RX200, AEROSIL RX300, AEROSIL RY200, AEROSIL R202, AEROSIL R805, AEROSIL R812, AEROSIL RA200H (see above, manufactured by Japan Aerosil corporation), CAB-O-SIL TS530 (manufactured by Cabot corporation), and the like.

In the oily solid cleansing cosmetic of the present invention, a small amount of water may be contained as the (F) component. The content of water is preferably 5% by mass or less of the total cosmetic composition, and if the content is in this range, the nonionic surfactant of component (C) and water are in a solubilized state, that is, a state in which an oily component is present as a dispersion medium, and component (C) and water are in a reversed micelle state. As a result, the nonionic surfactant of component (C) is easily dissolved in the oil agent composed of component (a) and component (B), and separation and precipitation of component (C) are not caused even in long-term storage, and the storage stability is improved. Particularly, when the water content is 0.1 to 3% by mass, the effect is remarkable.

The oily solid cleansing cosmetic of the present invention may contain, within a range not impairing the effects of the present invention, components used in usual cosmetics, for example, powders other than the component (D), dyes, oil gelling agents, oil-soluble resins, polyols, lower alcohols, ultraviolet absorbers, ultraviolet scattering agents, moisturizers, perfumes, antioxidants, preservatives, antifoaming agents, various kinds of extracts and other additives.

The oily solid cleansing cosmetic of the present invention does not exhibit fluidity at normal temperature (25 ℃) and normal pressure (1 atm), and the shape thereof is not particularly limited. Specific examples of the shape include a strip shape, a rod shape, a plate shape, and a shape formed by molding a filling container. These various cleansing cosmetics can be prepared according to a usual method. For example, the oily solid cleansing cosmetic can be prepared by heating all the raw materials to a temperature of not less than the melting point, uniformly mixing the raw materials, pouring the mixture in a molten state into a predetermined container such as a can container, a metal dish or a resin dish, and cooling or naturally cooling the mixture. Alternatively, the container may be filled in a long container to form a strip.

The oily solid cleansing cosmetic of the present invention has not only a makeup removal function but also properties required for a massage cosmetic, namely, moderate tackiness and slidability and durability of slidability. Therefore, in addition to the oily solid cleansing cosmetic of the present invention, it can be used as a massage cosmetic. When the oily solid cleansing cosmetic of the present invention is used, the makeup can be removed by mixing the cosmetic with the makeup and then rinsing with water or warm water. Therefore, the operation of washing the face with a cleanser such as soap, which is considered necessary after use in the conventional oily solid cleansing cosmetic, can be omitted. Of course, the detergent composition can also be used as a detergent for removing dirt such as sebum accumulated on skin without color cosmetics.

Examples

The present invention will be described more specifically below with reference to examples and comparative examples, but the present invention is not limited to these examples. Unless otherwise specified, the amount of the composition in the following description is mass% based on the total amount.

The evaluation methods of the oily solid cleansing cosmetic of the present invention in the following examples and comparative examples are as follows.

(good degree of removal of color cosmetics, easiness of washing, and refreshing feeling after washing)

A female panel 10 having makeup experience applied commercially available powder Foundation (Cezanne UV Foundation EX Plus, manufactured by Cezanne cosmetics co., ltd.) to the skin, cleaned with evaluation samples, and rated each item on 5 ranks of 1 to 5 points based on the evaluation criteria shown in the following (1). The average value of the scores of 10 persons was calculated, and the performance as a cleansing cosmetic was judged by 4 criteria of grade judgment shown in the following (2).

(1) Evaluation criteria

And 5, dividing: good taste

And 4, dividing: something as good

And 3, dividing: are neither good nor bad

And 2, dividing: some difference

1 minute: difference (D)

(2)4 grade judgment criteria

Very good: the average is 4-5 points

O: an average score of 3 to less than 4

And (delta): the average score is more than 2 and less than 3

X: average score is less than 2

(state of powder sedimentation)

150g of a sample for evaluation was dissolved at 80 ℃ to a temperature of 70 ℃, poured into a paper cup having an internal volume of 250mL, allowed to solidify by natural cooling at room temperature (25 ℃) for 1 hour, and then the content of each paper cup was vertically cut with a cutter knife to observe the cross section, and the presence or absence of sedimentation and color difference (color separation) of the powder was evaluated according to the following evaluation criteria.

(evaluation criteria)

Very good: the powder was uniformly dispersed and no sedimentation was observed.

O: the layer above 1/5 from above the cross-section has a low powder content.

And (delta): no powder was observed from layers above 1/5 from above the cross-section.

X: no powder was observed from layers above 1/3 from above the cross-section.

(State of color Difference)

Very good: the color tone was the same throughout the face, and no color difference was observed.

O: a portion slightly different in color tone was observed from the layer above 1/5 from above the cross section.

And (delta): portions having different color tones were observed from the layer above 1/5 in the cross section.

X: portions having different color tones were observed from the layer above 1/3 in the cross section.

Examples 1 to 2 and comparative examples 1 to 3

(oil-based solid cleansing cosmetic)

An oily solid cleansing cosmetic having a formulation shown in table 1 was prepared according to the following production method. In these formulations, two nonionic surfactants having different HLB values were used in combination as the (C) component, and the HLB value of the combination based on the weighted average was 8.6. The obtained oily solid cleansing cosmetic was evaluated for the degree of easiness of makeup removal, ease of rinsing, refreshing feeling after rinsing, powder sedimentation state, and color difference state by the above-mentioned methods. The evaluation results are shown in table 1.

(production method)

(1) The ingredients 1 to 7 shown in Table 1 were heated to about 90 ℃ and mixed uniformly.

(2) Adding 8-13 components to the mixed solution prepared in the step (1), and uniformly mixing at 90 ℃.

(3) Directly filling the mixed solution prepared in the step (2) into a tank container at 70 ℃ in a molten state, naturally cooling, and making into oily solid cleaning cosmetic.

[ Table 1]

In addition, the method is as follows: trade name PERFORAMOLENE 500(New Phase Technology Co., Ltd.)

In addition, 2: trade name of UNIOX GT20-IS (Nichigan oil Co., Ltd.)

And (2) in color: trade name of EMALX GWIS-305 (EMULSION, Japan)

In addition, 4: trade name of Rheopearl KL2 (manufactured by Qianye Mill Co., Ltd.)

In addition, the method is as follows: the trade name is GHASSOUL M (manufactured by GHASSOUL JAPAN JAMIELA corporation, color shade: dark green, volume average particle diameter: 20 μ M

In addition, 6: trade name of Kaolin JP-100 (color: white, volume average particle diameter: 11 μm, manufactured by Zhuyuan chemical Co., Ltd.)

In addition, the color is 7: trade name of AEROSIL 200 (manufactured by Japan AEROSIL Co., Ltd.)

In addition, the color is 8: trade name of AEROSIL RY200 (manufactured by Nippon AEROSIL Co., Ltd.)

From the results shown in table 1, it is understood that the oily solid cleansing cosmetic of the present invention is excellent in the performance as a cleansing cosmetic, such as the degree of good makeup removal, ease of rinsing, and refreshing feeling after rinsing, and is excellent in the quality because no sedimentation or color difference of powder occurs (examples 1 and 2). In particular, the fumed silica containing hydrophilic untreated silica as the component (E) is more excellent in the ease of rinsing and the refreshing feeling after rinsing. On the other hand, in the case of the moroccan lava clay containing no component (D), the removal of color cosmetics and the refreshing feeling were insufficient (comparative example 1), and in the case of the fumed silica containing no component (E), the sedimentation of powder was remarkable and a uniform product could not be obtained (comparative example 2). In addition, when a known dextrin palmitate was used as an oil phase thickener instead of fumed silica, the powder had insufficient anti-settling properties, and the ease of rinsing and refreshing feeling were also poor (comparative example 3).

Examples 3 to 4

(oil-based solid cleansing cosmetic)

Oily solid cleansing cosmetics of the formula shown in table 2 were prepared according to the following production methods, and the degree of good removal of color cosmetics, ease of rinsing, refreshing feeling after rinsing, state of sedimentation of powder, and color difference were evaluated by the methods described above. The evaluation results are shown in table 2.

(production method)

(1) The ingredients 1 to 6 shown in Table 2 were heated to about 90 ℃ and mixed uniformly.

(2) Adding 7-12 components to the mixed solution prepared in the step (1), and uniformly mixing at 90 ℃.

(3) Directly filling the mixed solution prepared in the step (2) into a tank container at 70 ℃ in a molten state, naturally cooling, and making into oily solid cleaning cosmetic.

[ Table 2]

In addition, the color is 9: trade name SPARCLAY SDR (color tone: deep red, volume average particle diameter: 16 μm, manufactured by Terramatter Co., Ltd.)

From the results in table 2, it is understood that the oily solid cleansing cosmetic of the present invention is excellent in cleansing performance, does not cause sedimentation of powder, and is excellent in quality. It is also found that when a combination of moroccan clay and a natural clay having a vivid hue is used, an oily solid cleansing cosmetic having high commercial value and no color difference can be obtained (example 4).

Industrial applicability

The present invention can provide an oily solid cleansing cosmetic which is excellent in cleansing performance, excellent in ease of rinsing and refreshing feeling after rinsing, and excellent in quality stability such as appearance and uniformity of composition of the product.