CN112867477B - Oily solid cleaning cosmetic - Google Patents

Abstract

The present invention addresses the problem of providing a solid oily cleansing cosmetic which is free from dripping of cleansing cosmetics, has high cleansing power and massaging effect, is excellent in washing easiness and refreshing feeling after washing, and is excellent in stability of quality (uniformity of appearance and composition). The solution is an oily solid cleaning cosmetic which contains, in the following proportions (proportion in the total amount of the cosmetic): 1 to 30% by mass of (A) solid oil having a melting point of 50 to 120 ℃, 50 to 95% by mass of (B) liquid oil, (C) 3 to 40% by mass of nonionic surfactant having an HLB value of 5 to 13, (D) 0.1 to 20% by mass of powdery Morocco karst clay, and (E) 0.1 to 10% by mass of fumed silica.

Description

Oily solid cleaning cosmetic

Technical Field

The present invention relates to solid oily cleaning cosmetics.

Background

In recent years, in makeup cosmetics such as lipsticks, foundations, eye shadows, and mascaras, products excellent in both water resistance and oil resistance have been developed, and the makeup retention has been remarkably improved. Therefore, when removing makeup from make-up cosmetics, oily cleansing cosmetics are used which are excellent in the performance of removing dirt (dirt removability) such as keratin and sebum, and which are well fused with make-up (cosmetic film on skin). Specific examples of oily cleansing cosmetics include cleansing oils, gel-like cleansing agents, cleansing pastes, and the like, and among them, oily cleansing cosmetics which are solid at ordinary temperature have a feature that they are free from dripping during use and are easy to massage when fused with makeup, and have been developed.

Patent document 1 discloses a stick-shaped cleansing cosmetic excellent in removal of skin dirt, dirt blocking pores, removal of blackheads, and the like, 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 ordinary temperature, and (d) a powder component. However, patent document 1 only evaluates the removal performance of skin dirt, and does not disclose cleaning of makeup using makeup cosmetics. In addition, there is no disclosure about washing the cleansing cosmetic with water or warm water.

Patent document 2 discloses that an oily solid cleansing cosmetic using a combination of a high-melting-point solid oil, a liquid oil and a nonionic surfactant is free from dripping during use, has a smooth and soft feel in use, and is excellent in ease of fusion with dirt and in refreshing feeling after washing. Patent document 3 discloses that a solid oily cleansing cosmetic 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 fusion with a color cosmetic, excellent in cleansing effect, and excellent in use feeling such as a fresh feeling after washing.

However, since oily solid cleansing cosmetics are oily formulations containing solid oil, they are not satisfactory in terms of refreshing feeling after washing, and further improvement in cleansing (easiness of removal of makeup) is also desired.

On the other hand, patent document 4 discloses an oily solid cosmetic containing an ethylene-propylene copolymer as a solid oil component and containing a specific ester oil and fumed silica, which has good cosmetic retention and excellent glossiness and feel in use. However, the oily solid cosmetic is used for eye creams, lipsticks, etc., and there is no disclosure about its use as a cleanser.

Prior art literature

Patent literature

Patent document 1: japanese patent laid-open No. 2002-302421

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

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

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

Disclosure of Invention

Problems to be solved by the invention

The present invention has been made in view of the above-described background art, and an object thereof is to provide an oily solid-state cleaning cosmetic which is more excellent in cleaning properties, ease of rinsing and refreshing feeling after rinsing, and stable in product quality, while maintaining the above-described properties peculiar to the oily solid-state cleaning cosmetic.

Means for solving the problems

Accordingly, the present inventors have conducted intensive studies to solve the above problems, and as a result, have found that an oily solid cleansing cosmetic containing a high-melting solid oil, a liquid oil, a nonionic surfactant having a specific HLB value, and a specific powder and fumed silica in 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 (all cosmetic references):

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

(B) 50 to 95 mass percent of liquid oil,

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

(D) 0.1 to 20 mass% of powdery Morocco karst clay

(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, has no dripping of the cleansing cosmetic, high cleansing power and massaging effect, excellent rinsing easiness and refreshing feeling after rinsing, and excellent stability of quality.

Detailed Description

(A: solid oil)

In the present invention, the solid oil component (A) is an oil which is solid at ordinary temperature (25 ℃) and has a melting point of 50 to 120 ℃, preferably 55 to 105 ℃, more preferably 60 to 100 ℃. The melting point of the solid oil can be measured by the melting point measurement method 2 which is a general test method standard for raw materials for pharmaceutical products in the medical sector. When the melting point is too low, the liquid oil of component (B) cannot be uniformly solidified, and the composition becomes liquid or has poor shape retention due to vibration or impact during transportation or carrying of the oily solid cleansing cosmetic. Conversely, when the melting point is too high, the composition becomes hard, and the finger-collecting property becomes poor when used as a cleansing cosmetic, and when melted, the composition needs to be handled at a high temperature, and thus oxidation degradation of the component (B) and the component (C) is likely to occur.

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

Examples of the commercial products of these solid oil components include paraffin 135, paraffin 140, paraffin 150, and HNP-11 manufactured by japan fine wax corporation as paraffin; HNP-9, hi-Mich-2065, hi-Mich-1070, hi-Mich-1080, hi-Mich-1090, HNP-0190 and Multiwax W-445, manufactured by Sonneborn, inc. as microcrystalline waxes; PERFORMANES 400, PERFORMANES 500, PERFORMANES 655, PERFORMANES of NEW PHASE TECHNOLOGIES, inc. as polyethylene wax; CIREBELLE 108, CIREBELLE 305 of CIREBELLE company as synthetic wax (Fischer-Tropsch wax); purified candelilla wax No.1 of Cerarica NODA corporation, candelilla NC1630, purified candelilla wax CG-7 of Traverse oil industry Co., ltd., purified candelilla wax SR-3, purified candelilla wax CG-7 of Japanese Natural Products Co., ltd., purified candelilla wax SR-3, high melting point candelilla wax FR100 of Japanese Natural Products Co., ltd., etc.

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

The component (A) may be a single compound, or two or more compounds may be used in combination. The content of the component (a) is 1 to 30% by mass, preferably 2 to 20% by mass, more preferably 3 to 15% by mass, based on the whole oily solid cosmetic. (A) Too little component causes insufficient shape retention, too soft component causes reduced massage effect. Conversely, if too many, the finger collection is poor, and if used, the elongation is poor, and it is difficult to massage. When an oily solid cleansing cosmetic in the form of a stick is produced, the blending amount of the component (a) is preferably 5 to 30% by mass relative to the whole cosmetic, whereby particularly good shape retention can be obtained.

(B: liquid oil)

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

The liquid oil (B) used in the present invention is not particularly limited as long as it is a liquid oil used in usual cosmetics, and may be any of animal oil, vegetable oil, and synthetic oil. Specific examples of the liquid oil include: esters such as tri (ethyl hexanoate), di (isostearyl) malate, di (glycerol) triisostearate, decaglycerol decaisostearate, oligomeric esters of dimer acid and dimer alcohol, pentaerythritol tetraisostearate, di (glycerol) tetraisostearate, cetyl isooctanoate, isopropyl myristate, isopropyl palmitate, octyl dodecyl myristate, neopentyl glycol dioctanoate, cholesterol fatty acid esters, jojoba oil; hydrocarbons such as volatile isoparaffins, polybutenes, polyisobutenes, heavy liquid isoparaffins, liquid paraffins, alpha-olefin oligomers, squalane, and vaseline; oils and fats such as olive oil, castor oil, mink oil, macadamia nut oil, and the like; 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, methylphenyl polysiloxane, methyltrimethyl polysiloxane, octanoyl trimethylpolysiloxane, crosslinked organopolysiloxane, and fluorine-modified polysiloxane; fluorine-containing oils such as perfluoropolyether; lanolin derivatives such as lanolin, lanolin acetate, isopropyl lanolin fatty acid, and lanolin alcohol; etc.

The content of the liquid oil component (B) is necessarily 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) Too little component results in poor fusion with makeup, and also, the elongation decreases, making massaging difficult. On the other hand, if the component (B) is too much, the shape retention is poor and the massage effect is also lowered.

(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 term "nonionic surfactant having an HLB value in the range of 5 to 13" means 1 nonionic surfactant having an HLB value in the range of 5 to 13, or a combination of a plurality of nonionic surfactants having an HLB value in the range, or a combination of a plurality of nonionic surfactants having a weighted average HLB value in the range of 5 to 13 as a result of combining 2 or more nonionic surfactants having different HLB values. Specific examples of the combination of nonionic surfactants having different HLB values include a combination of nonionic surfactants having an HLB value in the range of 5 to 13 and nonionic surfactants having an HLB value of less than 5.

The HLB is an index indicating the balance between hydrophilicity and lipophilicity, and is a value of 0 to 20, and the closer to 0, the higher the lipophilicity, the closer to 20, and the higher the hydrophilicity. As a method for calculating the HLB value, various calculation methods are known, and the value is described in a directory or the like provided by the manufacturer. In the present specification, the HLB value of the nonionic surfactant is calculated by the method (HLB value=20×sum of formulas of hydrophilic parts/molecular weight) described in "surfactant review" page 307 (published by industrial book corporation, 1960) when the nonionic surfactant is commercially available, and when the nonionic surfactant is not commercially available.

When the HLB value of the nonionic surfactant is less than 5, even if the cleansing cosmetic is fused with water or warm water on the skin, the cleansing cosmetic cannot be washed cleanly due to poor fusion with water, and a refreshing feeling after washing cannot be obtained. In contrast, when the HLB value exceeds 13, the hydrophobic makeup and the cleansing cosmetic cannot be fused, and the makeup removal becomes insufficient. Wherein, when HLB value is in the range of 6-11, the easy removal and washing of the makeup is good. (C) The nonionic surfactant of the component (c) may be either solid or liquid, but when the nonionic surfactant is liquid at 25 ℃, more excellent performance can be obtained in terms of easy removal from makeup and washing.

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

In the case where the nonionic surfactant used as the 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 or the like, and among these, the nonionic surfactant is preferably a residue of a branched higher fatty acid having excellent oxidation resistance in a liquid state, and particularly preferably an isostearic acid residue.

Examples of the commercially available nonionic surfactant used as the component (C) in the liquid state include: EMALEX RWIS-320 (PEG-20 hydrogenated castor oil triisostearate; manufactured by EMULSION Co., ltd., HLB 6), EMALEX GWIS-305 (PEG-5 glyceryl triisostearate; manufactured by EMULSION Co., ltd., HLB 3), UNIX GT-20IS (PEG-20 glyceryl triisostearate; manufactured by daily oil 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., HLB 8), EMALEX SWS-12 (steareth-12 stearate; manufactured by EMULSION Co., ltd., HLB 8), EMALEX 608 (steareth-8; manufactured by EMULSION Co., ltd., HLB 9), and the like.

(C) The amount of the component used is 3 to 40% by mass, preferably 4 to 35% by mass, more preferably 5 to 30% by mass, particularly preferably 7 to 25% by mass, based on the total composition. When the amount is too small, the easiness of removal and washing of makeup is lowered, and when the amount is too large, there is a concern that skin is irritated.

(D: powdered Morocco karst clay)

In the present invention, in addition to the above-mentioned components (a) to (C), a powdery morocco claystone clay (D) may be used as the powdery component. The morocco karst clay is a clay classified as montmorillonite produced from morocco, and has a volume average particle diameter of usually 10 to 30 μm, and is a substance exhibiting a light dark green color. The morocco karst clay has been known since ancient times as a material for clay therapy such as mud bags, and is expected to have high adsorption force against dirt on skin and an effect on skin of mineral components contained in the components. The morocco karst clay is commercially available from the company GHASOOUL JAPAN JAMIELA under the trade name GHASOOULM.

The amount of the 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 cleansing removal and massaging effects are improved, and the refreshing feeling after washing is improved. In addition, in the present invention, the morcella claystone clay may be used alone as a powder component, or other powders may be used in place of a part of the morcella claystone clay as desired.

The other powder that may be used in place of a part of the component (D) is not particularly limited as long as it is a powder that is usually blended into cosmetics, and any powder may be used as long as it has a volume average particle diameter of 1 to 200 μm, and the material (organic, inorganic, etc.), shape (spherical, needle-like, plate-like, etc.), particle structure (porous, nonporous, etc.) thereof are not limited. Among them, when the powder is porous and has a large specific surface area, the powder is preferably used because of its excellent property of adsorbing makeup dirt. Here, 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 using a sample obtained by subjecting 95% ethanol as a solvent to ultrasonic dispersion treatment for 5 minutes, and is not limited to the primary particle diameter. The ultrasonic dispersion treatment was performed using an ultrasonic cleaner W-113 (manufactured by Kagaku Kogyo Co., ltd.) at a frequency of 28 kHz.

As such other powders, for example, there may be exemplified: 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, aluminum magnesium silicate, calcium silicate, barium sulfate, magnesium carbonate, boron nitride, bismuth oxychloride, aluminum oxide, zirconium oxide, and hydroxyapatite; organic powders such as silicone powder, silicone elastomer powder, polyurethane powder, cellulose powder, nylon powder, silk powder, PMMA powder, starch, polyethylene powder, lauroyl lysine, metal soap, plant powder (apricot kernel, walnut kernel, glucomannan powder, etc.); carbon powder such as activated carbon, medicinal carbon, and bamboo carbon; and their composites and granulates.

Among these, clay minerals and carbon powder are preferably used because of their excellent fresh feeling after removal of makeup and washing. The natural clay and sea mud as clay minerals are a mixture of kaolin, montmorillonite, mica, etc., and some of them have influence on the effect of each of the place of origin, kind and color, and can also be used for clay therapy, so that the satisfaction of the user can be further improved. Specific examples of such natural clays and sea mud include chamotte clay, palaobai clay, sparclay (trade name) and Tersil (trade name) produced in Brazil, and Clargile (trade name) produced in the French industry.

When a part of the component (D) is replaced with another powder, the proportion of the component (D) in the whole powder is 30% by mass or more, preferably 40 to 95% by mass, and more preferably 50 to 90% by mass. The use of other powder in place of part of the morofacious clayey clay, i.e., the combination of the morofacious clayey clay and other powder, makes it possible to suitably adjust the degree of cleansing and refreshing feeling, and in particular, in the case of using clay minerals such as natural clay, which have various effects on the production place and the kind of clay, in combination, it is possible to obtain characteristics derived from other clay minerals in addition to the skin effect expected for the morofacious clayey clay.

In the present invention, fumed silica is further contained as the component (E). In the production of a cleansing cosmetic from a complex containing a solid oil component, it is necessary to fill a predetermined container with the complex in a molten state after being uniformly mixed, and then cool and solidify the complex. In the case of the complex of the moromitic lava clay containing the component (D), if the complex filled in the container is rapidly solidified, the dispersed state of the powder can be uniformly maintained. For example, in general, a makeup cosmetic such as lipstick has a product weight of several grams, and therefore, the time from filling to curing is extremely short, and there is little risk of impairing the dispersibility of the morofold karst clay contained in the composition. However, in the case of a cleansing cosmetic, the average weight of each product is usually about 100 g or more than 100 g, and therefore, even if the container filled with the complex is cooled from the outside with cold air or the like, the time required until solidification is long, during which there is a case where sedimentation of the morocco karst clay is caused. If the powder component is settled, the dispersion of the powder component becomes uneven, 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 impaired.

The amount of the 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 of the component (E) to the Morocco lava clay of the component (D) [ E)/(D) ] is preferably 0.01 to 10, more preferably 0.05 to 5. (E) When the amount of the component (D) is within the above range, the dispersion state of the component (D) in the cosmetic is improved, and the sedimentation of the component (D) can be effectively suppressed when the complex is melt-filled in the process of producing the cleansing cosmetic.

(E) The fumed silica as the component is finely amorphous silica also called fumed silica, and has a soft, pale white powder appearance. Fumed silica can be obtained, for example, by hydrolyzing a raw material such as silicon tetrachloride at high temperature in an oxyhydrogen flame. The specific surface area of the fumed silica is preferably30m ² Preferably 50 to 400m, per gram or more ² Preferably from 100 to 400m ² And/g. If the specific surface area is too small, sedimentation of the component (D) cannot be effectively suppressed when the complex is melt-filled in the process of producing a cleansing cosmetic.

The primary particle size of these fumed silicas is preferably 50nm or less, particularly preferably 20nm or less. The primary particle diameter can be determined as an average value of 3000 to 5000 particles measured by electron microscopy. (E) The component may be untreated fumed silica which exhibits hydrophilicity, or may be fumed silica subjected to hydrophobization. Specific examples of the hydrophobizing treatment include dimethyldichlorosilane treatment, trimethylsiloxy treatment with trimethylchlorosilane or hexamethyldisilazane, octylsilanization treatment, dimethylsilicone treatment, coating sintering treatment with methylhydrogen polysiloxane, and coating with metal soap. Among these fumed silica, untreated fumed silica is preferable from the viewpoint of easiness of washing.

Examples of the commercial products of the component (E) include AEROSIL 50, AEROSIL 130, AEROSIL 200V, AEROSIL CF, AEROSIL 200FAD, AEROSIL 300CF, AEROSIL 380S (manufactured by Japanese AEROSIL Co., ltd.) and the like as untreated fumed silica; AEROSIL R972, AEROSIL R972V, AEROSIL R972CF, AEROSIL R974, AEROSIL R976S, AEROSIL RX200, AEROSIL RX300, AEROSIL RY200, AEROSIL R202, AEROSIL R805, AEROSIL R812, AEROSIL RA200H (above, manufactured by japan AEROSIL corporation), CAB-O-SIL TS530 (manufactured by Cabot corporation), and the like as AEROSIL R972, AEROSIL R972V, AEROSIL R976S, AEROSIL RX200, AEROSIL R812, AEROSIL RA200H (above).

The oily solid cleansing cosmetic of the present invention may contain a small amount of water as the component (F). The content of water is preferably 5% by mass or less of the total cosmetic product, and if the content is within this range, the nonionic surfactant of the component (C) and water are in a solubilized state, that is, in a state in which an oily component is present as a dispersion medium and the component (C) and water are in a reversed micelle state. As a result, the nonionic surfactant of the component (C) is easily dissolved in the oil solution composed of the component (a) and the component (B), and the component (C) is not separated or precipitated even if stored for a long period of time, thereby improving the storage stability. In particular, when the water content is 0.1 to 3 mass%, the effect is remarkable.

The oily solid cleansing cosmetic of the present invention may contain components used in usual cosmetics, for example, other than the component (D), powder, dye, oil gelling agent, oil-soluble resin, polyhydric alcohol, lower alcohol, ultraviolet absorber, ultraviolet scattering agent, humectant, perfume, antioxidant, preservative, antifoaming agent, various extracts and other additives within a range not impairing the effect of the present invention.

The oily solid cleansing cosmetic of the present invention does not exhibit fluidity at normal temperature (25 ℃) and normal pressure (1 atm), and its shape is not particularly limited. Specific examples of the shape include a bar, a rod, a plate, and a shape formed by pouring into a container. These various cleansing cosmetics can be prepared according to a usual method. For example, all the raw materials may be heated to a temperature equal to or higher than the melting point, and then, after being uniformly mixed, the mixture may be directly poured into a predetermined container such as a pot container, a metal dish or a resin dish in a molten state, and cooled or naturally cooled to prepare an oily solid cleansing cosmetic. Alternatively, the container may be filled with a strip-shaped container to be formed into a strip shape.

The oily solid cleansing cosmetic of the present invention has characteristics required for a massaging cosmetic, that is, moderate viscosity and slidability and sustainability of slidability, in addition to the makeup removing function. Therefore, it can be used as a massage cosmetic in addition to the oily solid-state cleaning cosmetic of the present invention. When the oily solid-state cleaning cosmetic of the present invention is used, the makeup may be removed by washing with water or warm water after the cosmetic is blended with the makeup. Therefore, the operation of washing the face with a cleanser such as soap, which is considered necessary after use in the case of using a conventional oily solid cleansing cosmetic, can be omitted. Of course, the detergent composition can be used as a detergent for removing dirt such as sebum accumulated on skin without makeup.

Examples

The present invention will be described more specifically with reference to examples and comparative examples, but the present invention is not limited to these examples. If not specifically described, the amount to be blended in the prescription described below is mass% with respect to the total amount.

The evaluation methods of the oily solid-state cleaning cosmetics of the present invention in the following examples and comparative examples are as follows.

(good degree of makeup removal, ease of washing, fresh feel after washing)

After applying a commercially available powdery foundation (Cezanne UV Foundation EX Plus, manufactured by Cezanne cosmetics corporation) to the skin, 10 persons of a female evaluation group having cosmetic experience had cleaned the skin with a sample for evaluation, and each item was rated on 5 grades of 1 to 5 points based on the evaluation standard shown in the following (1). The average value of the scores of the evaluators 10 was calculated, and the performance as a cleaning cosmetic was judged by the 4-rank judgment criteria shown in the following (2).

(1) Evaluation criterion

5, the method comprises the following steps: good (good)

4, the following steps: some are good

3, the method comprises the following steps: neither good nor bad

2, the method comprises the following steps: to a certain extent poor

1, the method comprises the following steps: difference of difference

(2) 4 rank criterion

And (3) the following materials: average division into 4-5 minutes

O: average division into more than 3 and less than 4

Delta: average division into more than 2 and less than 3

X: average score is less than 2 minutes

(state of powder sedimentation)

150g of the sample for evaluation was dissolved at 80℃to a temperature of 70℃and poured into a 250mL paper cup, and after cooling naturally at room temperature (25 ℃) for 1 hour to solidify, the contents of each paper cup were cut vertically with a cutter and the cross section was observed, and the state of sedimentation and the presence or absence of color separation of the powder were evaluated according to the following evaluation criteria.

(evaluation criterion)

And (3) the following materials: the powder was uniformly dispersed and no sedimentation was observed.

O: more than 1/5 of the layers from above the cross section have a portion with little powder.

Delta: no powder was observed in the layer 1/5 or more above the cross section.

X: no powder was observed in the layer 1/3 or more above the cross section.

(state of color difference)

And (3) the following materials: the color tone was the same throughout the entire face, and no color difference was observed.

O: a slightly different hue was observed in the layer 1/5 or more above the cross section.

Delta: the portions different in color tone are observed from the layer 1/5 or more above the cross section.

X: the portions different in color tone were observed from the layer 1/3 or more above the cross section.

Examples 1 to 2 and comparative examples 1 to 3

(oily solid cleaning cosmetic)

Oily solid cleansing cosmetics of the formula shown in table 1 were prepared according to the following manufacturing method. In these prescriptions, two nonionic surfactants having different HLB values are used in combination as the (C) component, and the weighted average-based HLB value of the combination is 8.6. The obtained oily solid cleansing cosmetic was evaluated for the degree of good makeup removal, ease of washing, refreshing feeling after washing, sedimentation state of powder, and state of color difference by the above-described method. The evaluation results are shown in Table 1.

(manufacturing method)

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

(2) The components 8 to 13 were added to the mixed solution prepared in the above (1), and the mixture was uniformly mixed at 90 ℃.

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

TABLE 1

1: trade name PERFORMANEE 500 (New Phase Technology company)

2: trade name UNIX GT20-IS (daily oil Co., ltd.)

3: trade name EMALEX GWIS-305 (EMULSION Co., ltd., japan)

4: trade name Rheopearl KL2 (manufactured by Qianye powder Co., ltd.)

And 5: trade name of GHASOOUL M (GHASOOUL JAPAN JAMIELA Co., ltd., color tone: dark green, volume average particle size: 20 μm)

And 6: trade name of kaolin JP-100 (color tone: white, volume average particle size: 11 μm, manufactured by Zhu Yuan chemical industry Co., ltd.)

7: trade name AEROSIL 200 (manufactured by Japanese AEROSIL Co., ltd.)

8: trade name AEROSIL RY200 (manufactured by Japanese AEROSIL Co., ltd.)

From the results shown in table 1, it is clear that the oily solid-state cleansing cosmetic of the present invention is excellent in the performance as a cleansing cosmetic such as the degree of color makeup removal, the ease of washing, and the refreshing feeling after washing, and is free from sedimentation and color difference of powder, and therefore, is excellent in quality (examples 1 and 2). In particular, the fumed silica containing hydrophilic untreated silica as the component (E) is more excellent in the ease of washing and the refreshing feeling after washing. On the other hand, in the case of the moromi karst clay containing no component (D), the cleansing performance was insufficient (comparative example 1), and in the case of the fumed silica containing no component (E), the sedimentation of the 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 was insufficient in sedimentation resistance, and the washing easiness and the refreshing feeling were poor (comparative example 3).

Examples 3 to 4

(oily solid cleaning cosmetic)

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

(manufacturing method)

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

(2) The components of 7 to 12 were added to the mixed solution prepared in the above (1), and the mixture was uniformly mixed at 90 ℃.

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

TABLE 2

And 9: trade name SPARCLAY SDR (produced by Teramatter company, hue: deep red, volume average particle size: 16 μm)

From the results in table 2, it is found that the oily solid cleansing cosmetic of the present invention is excellent in cleansing performance, and is free from sedimentation of powder and excellent in quality. In addition, it was found that the use of the morofold clay in combination with the natural clay having a vivid color led to the production of an oily solid cleansing cosmetic having a high commercial value and no color difference (example 4).

Industrial applicability

According to the present invention, an oily solid cleansing cosmetic which is excellent in cleansing performance, excellent in washing easiness and refreshing feeling after washing, and excellent in quality stability such as appearance and uniformity of composition of the product can be provided.

Claims (5)

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

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

(B) 50 to 95 mass percent of liquid oil,

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

(D) 0.1 to 20 mass% of Morocco karst clay

(E) Specific surface area 30m ² Above/g and 400m ² 0.1 to 10% by mass of fumed silica per gram or less.

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

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

3. The oily solid cleaning cosmetic according to claim 1 or 2, further comprising water as component (F) in an amount of 0.1 to 3 mass%.

4. The oily solid cleaning cosmetic according to claim 1 or 2, wherein,

the component (A) is hydrocarbon wax.

5. The oily solid cleaning cosmetic according to claim 1 or 2, wherein,

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