Pack cosmetic

Abstract

To provide a pack cosmetic which provides a thick application feeling when used at high temperatures, spreads smoothly when used at low temperatures, does not cause skin tightness after rinsing, and enhances the skin affinity of a lotion applied after rinsing.SOLUTION: A pack cosmetic comprises the following components (A) to (D): (A) kaolin: 30 to 90 mass%; (B) water-swelling clay mineral: 0.1 to 20 mass%; (C) one or more thickening polysaccharides selected from the group consisting of xanthan gum, guar gum, locust bean gum, tamarind seed gum, and gellan gum: 0.05 to 1 mass%; and (D) acidic mucopolysaccharide: 0.0001 to 0.1 mass%.SELECTED DRAWING: None

Description

[Technical Field]

[0001] To provide a pack cosmetic, more particularly, a pack cosmetic that has a thick application feeling even when used at a high temperature, is easy to spread even when used at a low temperature, does not make the skin feel tight after rinsing, and has the effect of improving the compatibility of a lotion used on the skin after rinsing. [Background technology]

[0002] Pack cosmetics differ from daily skin care products that are used every day in that they are used several times a week as special care products, primarily for the purpose of improving the condition of the skin on the face, body, etc. The main functions of pack cosmetics are to "remove dirt from the skin (removing dirt from the skin surface)" and "moisturize and condition the skin (moisturizing and revitalizing the skin)." Pack cosmetics remove dirt that is difficult to remove with everyday skin care products and also have a skin-conditioning effect, making them effective for maintaining good skin condition.

[0003] Among the various types of face packs, mud packs are widely used. Mud packs are face packs that utilize the adsorption power of mud (clay) to remove dirt from the skin and also provide skin conditioning effects by adding minerals, and contain primarily clay minerals. Among these, mud packs with a high concentration of mud are popular as they are particularly effective at adsorbing dirt.

[0004] For example, Patent Document 1 discloses a skin cleanser containing a high blend of inorganic powders such as kaolin (15 to 60%) and an anionic surfactant. This skin cleanser is effective in removing excess keratin from the skin and smoothing the roughness of the skin surface, but it can also remove moisturizing components from the skin, leaving the skin feeling tight after rinsing. For this reason, there has been a demand for a pack cosmetic that does not leave the skin feeling tight even after rinsing.

[0005] In response to these issues, Patent Document 2 discloses a pack cosmetic containing silicates such as kaolin and montmorillonite, isomalt, a polyhydric alcohol other than isomalt, a water-soluble polymer, and a surfactant. This pack cosmetic provides a smooth, comfortable feeling on the skin while rinsing with water, and leaves the skin feeling smooth, silky, and moisturized after rinsing, but there are cases where the pack cosmetic feels thick and is not easy to spread due to differences in temperature.

[0006] Pack cosmetics that are applied by drying moisture on the skin are required to achieve both a thick application feel and ease of spreadability from the standpoint of usability and comfort, but when used at high temperatures such as in summer, the viscosity of the pack cosmetic decreases, resulting in an insufficient thick application feel, and conversely, when used at low temperatures such as in winter, the viscosity of the pack cosmetic increases, resulting in insufficient ease of spreadability. Therefore, it has been difficult to achieve a pack cosmetic that is comfortable to apply at all temperatures throughout the year.

[0007] Patent Document 3 discloses a pack cosmetic that contains a high blend of clay minerals (10 to 50% by mass), thickening polysaccharides, a nonionic surfactant, and a specific copolymer. This pack cosmetic spreads smoothly on the skin and has the effect of imparting a smooth feeling to the skin after cleansing, but the document does not describe the spreadability depending on temperature, and there is a risk that it may feel thick when used at high temperatures, or that it may not be easy to spread when used at low temperatures.

[0008] Furthermore, after washing with a mud pack, it is common to moisturize the skin with skin care products such as lotion. Because the skin is dehydrated after washing, it is necessary to apply a moisturizer to the skin as quickly as possible. Therefore, there has been a demand for pack cosmetics that improve the absorption of lotion used on the skin after rinsing, but there has not been a pack cosmetic that solves this problem until now.

[0009] As described above, there has been a demand for a pack cosmetic that provides a thick application feeling even when used at a high temperature, is easy to spread even when used at a low temperature, does not leave the skin feeling tight after rinsing, and allows lotion used after rinsing to blend well with the skin. However, it has been difficult to develop a pack cosmetic that meets these requirements. [Prior art documents] [Patent documents]

[0010] [Patent Document 1] Japanese Patent Application Publication No. 8-67622 [Patent Document 2] Japanese Patent Application Publication No. 2023-63714 [Patent Document 3] Japanese Patent Application Publication No. 2023-131066 Summary of the Invention [Problem to be solved by the invention]

[0011] In view of the above problems, an object of the present invention is to provide a pack cosmetic which has a thick application feeling even when used at a high temperature, is easy to spread even when used at a low temperature, does not make the skin feel tight after rinsing, and has the effect of improving the compatibility of a lotion used on the skin after rinsing. [Means for solving the problem]

[0012] As a result of extensive research into solving the above-mentioned problems, the present inventors discovered that the above-mentioned problems could be solved by a pack cosmetic containing at least the following components (A) to (D) in specific proportions, and thus completed the present invention.

[0013] That is, the present invention includes the following aspects. Aspect (1) of the present invention is a pack cosmetic containing the following components (A) to (D): (A) Kaolin: 30 to 90% by mass (B) Water-swellable clay mineral: 0.1 to 20% by mass (C) One or more thickening polysaccharides selected from the group consisting of xanthan gum, guar gum, locust bean gum, tamarind seed gum, and gellan gum: 0.05 to 1% by mass (D) Acidic mucopolysaccharides: 0.0001 to 0.1% by mass

[0014] Aspect (2) of the present invention is the pack cosmetic of aspect (1), further comprising the following component (E): (E) Water-soluble anti-inflammatory ingredient having a solubility in water at 25°C of 0.5% by mass or more: 0.05 to 10% by mass

[0015] Aspect (3) of the present invention is the pack cosmetic of Aspect (1) or Aspect (2), further comprising the following component (F): (F) Alkylene oxide derivative represented by formula (1) Z-[O(EO)a-(PO)b-(BO)cH]x (1) (In formula (1), Z is a residue obtained by removing all hydroxyl groups from a compound having 1 to 7 carbon atoms and 1 to 4 hydroxyl groups.) x represents an integer of 1 to 4. EO is an oxyethylene group. PO is an oxyalkylene group having 3 carbon atoms. BO is an oxyalkylene group having 4 carbon atoms. a is the average number of moles of EO added, and 0≦a≦100; b is the average number of moles of PO added, and 0≦b≦60; and c is the average number of moles of BO added, and 0≦c≦5. However, a, b, and c do not all become 0. When a and b are not 0, the ratio (a / b) is 1 / 5 to 7 / 1. [Effects of the Invention]

[0016] The pack cosmetic of the present invention has a thick coating feeling even when used at a high temperature, is easy to spread even when used at a low temperature, does not make the skin feel tight after rinsing, and has the effect of improving the affinity of a lotion used on the skin after rinsing. Pack cosmetics include, for example, types that are dried and peeled off (peel-off types), rub-off types (peeling types), wipe-off types, and wash-off types, and the pack cosmetics of the present invention can be applied to the face or other parts of the body as peel-off types, peeling types, wipe-off types, or wash-off types, but are preferably applied to the face as wash-off types such as mud packs. In this specification, "skin" refers to the body surface of the head, neck, torso, arms, and legs, including the face, and is synonymous with skin. DETAILED DESCRIPTION OF THE INVENTION

[0017] Hereinafter, an embodiment of the present invention will be described, but the present invention is not limited to the embodiment described in this specification and can be modified in various ways without departing from the gist of the present invention. In this specification, a numerical range defined using the symbol "to" is intended to include both the upper and lower limits of the symbol "to." For example, "2 to 5" means 2 or more and 5 or less. Furthermore, in the numerical ranges described in this specification, the upper or lower limit of the numerical ranges can be replaced with values ​​shown in the examples or values ​​that can be uniquely derived from the examples. Furthermore, the content of each component is expressed as a percentage by mass when the total amount of the pack cosmetic is taken as 100% by mass.

[0018] <Pack cosmetics> The pack cosmetic of the present invention contains at least the following components (A), (B), (C), and (D). Each component will be explained below.

[0019] [Component (A): Kaolin] Component (A) used in the present invention is kaolin. Kaolin is a clay mineral whose main component is kaolinite. Kaolinite is a type of silicate mineral, a hydrated aluminum silicate represented by AlO3·2SiO2·2H2O. Kaolin is contained as one of the components in silt, for example, and silt can also be used as kaolin, but it is preferable to use kaolin produced from silt, as this reduces the thick feeling when used at high temperatures and improves the skin affinity of lotion used after rinsing.

[0020] The kaolin may be produced by any of the wet, calcination, and dry methods, but the wet method is preferred. The particle size of the kaolin is not particularly limited, but is preferably about 0.5 to 50 μm. The particle size of the kaolin can be measured by a laser diffraction / scattering method, but catalog values ​​can also be used.

[0021] The content of component (A) is 30 to 90% by mass, preferably 35 to 80% by mass, and more preferably 37 to 70% by mass, based on the total mass of the pack cosmetic. If the content of component (A) is too low, the product may feel thick when used at a high temperature and the lotion applied after rinsing may not blend well with the skin.If the content of component (A) is too high, the product may not spread easily when used at a low temperature and the skin may not feel tight after rinsing.

[0022] [Component (B): Water-swellable clay mineral] The component (B) used in the present invention is a water-swellable clay mineral. The water-swellable clay mineral is a clay mineral whose main components are magnesium-aluminum silicate and magnesium-sodium silicate. Generally, the water-swellable clay mineral is preferably a smectite group mineral, such as montmorillonite, hectorite, saponite, beidellite, or stevensite. The water-swellable clay mineral may be either a natural product or a synthetic product, and examples thereof include synthetic saponite, synthetic hectorite, and purified natural montmorillonite. Among these, saponite and montmorillonite are preferred, with saponite being particularly preferred.

[0023] The viscosity of a dispersion of 4% by mass of component (B) dispersed in ion-exchanged water (hereinafter also referred to as "4% aqueous dispersion viscosity") is preferably 250 to 6,000 mPa·S, more preferably 1,000 to 6,000 mPa·S, and even more preferably 3,000 to 6,000 mPa·S. When the viscosity of a 4% aqueous dispersion of component (B) is within this range, the ease of spreading when used at low temperatures is further improved. In this specification, the viscosity of a 4% aqueous dispersion is a value measured using a Brookfield viscometer (Rotor No. 4, 30 rpm, 100 sec.).

[0024] In the present invention, the water-swellable clay mineral may be one prepared according to a known manufacturing method, or may be a commercially available product for use in cosmetics, quasi-drugs, etc. Examples of water-swellable clay mineral products that can be used include "Sumecton-SA" (synthetic saponite, viscosity of 4% aqueous dispersion: 5,500 mPa·S), "Sumecton-SWN" (synthetic hectorite, viscosity of 4% aqueous dispersion: 5,500 mPa·S), and "Kunipia-F" (purified montmorillonite, viscosity of 4% aqueous dispersion: 300 mPa·S) (all manufactured by Kunimine Kogyo Co., Ltd.).

[0025] The pack cosmetic of the present invention can contain, as component (B), one or a combination of two or more of the above-mentioned water-swellable clay minerals. Among them, it is preferable to contain at least synthetic saponite, taking into consideration smooth spreading and a thick application feel.

[0026] The content of component (B) is 0.1 to 20% by mass, preferably 0.5 to 15% by mass, and more preferably 0.8 to 10% by mass, relative to the total mass of the pack cosmetic. If the content of component (B) is too low, the product may feel thick when used at high temperatures and may not spread easily when used at low temperatures.If the content of component (B) is too high, the lotion used after rinsing may not blend well with the skin. When two or more types of water-swellable clay minerals are used as component (B), the total content thereof should be within the above range.

[0027] [Component (C): Thickening polysaccharide] The component (C) used in the present invention is one or more thickening polysaccharides selected from the group consisting of xanthan gum, guar gum, locust bean gum, tamarind seed gum, and gellan gum. Among these, xanthan gum is preferred in view of smoothness of spread and ease of rinsing.

[0028] The content of component (C) is 0.05 to 1% by mass, preferably 0.1 to 0.5% by mass, and more preferably 0.15 to 0.3% by mass, relative to the total mass of the pack cosmetic. If the content of component (C) is too low, the ease of application when used at low temperatures, the lack of tightness in the skin after rinsing, and the goodness with which a lotion applied after rinsing is absorbed into the skin may be insufficient.If the content of component (C) is too high, the goodness with which a lotion applied after rinsing is absorbed into the skin may be insufficient. When two or more types of thickening polysaccharides are used as component (C), the total content thereof may be within the above range.

[0029] [Component (D): Acidic mucopolysaccharides] The component (D) used in the present invention is an acidic mucopolysaccharide. The acidic mucopolysaccharide used in the present invention is a component that is distributed in large amounts in connective tissue, cartilage, skin tissue, etc., has high water retention, and binds to collagen, which acts as a support for the extracellular matrix, helping to maintain the function and morphology of cells. In skin tissue, acidic mucopolysaccharides and collagen are found in large amounts in the dermis layer and are greatly involved in the water retention and elasticity of the skin. It is known that when the amounts of these components decrease due to aging, the skin loses its water retention and elasticity, causing rough skin and fine wrinkles.

[0030] Specific examples of acidic mucopolysaccharides include acidic mucopolysaccharides such as hyaluronic acid, chondroitin-4-sulfate, chondroitin-6-sulfate, dermatan sulfate, keratan sulfate, and heparin; salts formed from acidic mucopolysaccharides and inorganic or organic alkalis; and acetylated acidic mucopolysaccharides. Inorganic salts of acidic mucopolysaccharides include alkali metal salts such as sodium salts and potassium salts, and organic salts include quaternary ammonium salts. Preferred salts are sodium salts and potassium salts. The acidic mucopolysaccharide is preferably hyaluronic acid, chondroitin-4-sulfate, chondroitin-6-sulfate or a salt thereof, more preferably hyaluronic acid or a salt thereof. As component (D), one kind selected from these acidic mucopolysaccharides can be used alone, or two or more kinds can be used in combination. The acidic mucopolysaccharides that can be used include commercially available products and prepared products.

[0031] The mass of one molecule of component (D) is preferably 0.3 to 2.5 MDa, more preferably 0.5 to 2.3 MDa, and even more preferably 1 to 2 MDa. When the mass of component (D) is within the above range, the skin does not feel tight after rinsing. In this specification, the Daltons (Da) of the acidic mucopolysaccharide of component (D) is a value measured by GPC (gel permeation chromatography).

[0032] The content of component (D) is 0.0001 to 0.1% by mass, preferably 0.0003 to 0.08% by mass, and more preferably 0.0005 to 0.05% by mass, relative to the total mass of the pack cosmetic. If the content of component (D) is too low, the product may not spread easily when used at low temperatures, the skin may not feel tight after rinsing, and the lotion used after rinsing may not blend well with the skin. If the content of component (D) is too high, the effect commensurate with the amount used may not be obtained. When two or more types of acidic mucopolysaccharides are used as component (D), the total content thereof may be within the above range.

[0033] [Component (E): a water-soluble anti-inflammatory component having a solubility in water at 25°C of 0.5% by mass or more] In addition to the above components (A) to (D), the pack cosmetic of the present invention may further contain, as component (E), a water-soluble anti-inflammatory component having a solubility in water of 0.5% by mass or more at 25° C. A solubility in water of 0.5% by mass or more means that 0.5 g or more of solids dissolve in 100 g of water.

[0034] Specific examples of water-soluble anti-inflammatory ingredients having a solubility of 0.5% by mass or more in water at 25°C include allantoin (solubility 0.5% by mass), dipotassium glycyrrhizinate (solubility 1% by mass), tranexamic acid (solubility 16% by mass), ascorbic acid glucoside (solubility 71% by mass), and niacinamide (solubility 100% by mass). As component (E), one selected from these water-soluble anti-inflammatory components can be used alone, or two or more can be used in combination. When one component is used alone, it is preferable to use one selected from tranexamic acid, ascorbic acid glucoside, and niacinamide. When two or more components are used in combination, it is preferable to use one selected from tranexamic acid, ascorbic acid glucoside, and niacinamide in combination with one selected from allantoin and dipotassium glycyrrhizinate.

[0035] When the pack cosmetic of the present invention contains component (E), the content of component (E) is preferably 0.05 to 10% by mass, more preferably 0.1 to 8% by mass, and even more preferably 1 to 5% by mass, relative to the total mass of the pack cosmetic. When the content of component (E) is within this range, the feeling of thick application when used at high temperatures and the lack of tightness on the skin after rinsing are further improved.

[0036] [Component (F): Alkylene oxide derivative] In addition to the above components (A) to (D), the pack cosmetic of the present invention may further contain, as component (F), an alkylene oxide derivative represented by the following formula (1).

[0037] Z-[O(EO)a-(PO)b-(BO)cH]x (1)

[0038] In formula (1), Z is a residue obtained by removing all hydroxyl groups from a compound having 1 to 7 carbon atoms and 1 to 4 hydroxyl groups. Examples of Z include a methyl glucoside residue (a residue obtained by removing all hydroxyl groups from a compound having 7 carbon atoms and 4 hydroxyl groups), a glycerin residue (a residue obtained by removing all hydroxyl groups from a compound having 3 carbon atoms and 3 hydroxyl groups), and a butanol residue (a residue obtained by removing all hydroxyl groups from a compound having 4 carbon atoms and 4 hydroxyl groups).

[0039] x represents an integer of 1 to 4. EO is an oxyethylene group. PO is an oxyalkylene group having 3 carbon atoms, such as an oxypropylene group or an oxytrimethylene group, with an oxypropylene group being preferred. BO is an oxyalkylene group having 4 carbon atoms, such as an oxybutylene group, an oxyisobutylene group, an oxytetramethylene group, or an oxyt-butylene group, with an oxybutylene group being preferred. From the viewpoint of polymerizability, the 1,2-oxypropylene group is preferred among the oxypropylene groups, and the 1,2-oxybutylene group is preferred among the oxybutylene groups.

[0040] a is the average number of moles of EO added, and is 0≦a≦100, preferably 0≦a≦30, and more preferably 0≦a≦15. b is the average number of moles of PO added, and is 0≦b≦60, preferably 0≦b≦20, and more preferably 0≦b≦10. c is the average number of moles of BO added, and is 0≦c≦5, preferably 0≦c≦4, and more preferably 0≦c≦3. However, there is no case where all of a, b, and c are 0. When neither a nor b is 0, the ratio (a / b) is 1 / 5 to 7 / 1, preferably 1 / 3 to 5 / 1, and more preferably 1 / 2 to 4 / 1. EO, PO and BO may be added randomly or in blocks, but it is more preferable that random and block moieties are mixed.

[0041] In the present invention, the alkylene oxide derivative may be prepared according to a known production method, or may be a commercially available product for use in cosmetics, quasi-drugs, etc. Examples of the alkylene oxide derivative product include "Macbiobride (registered trademark) MG-10E" (Z is a methyl glucoside residue, x is 4, a is 2.5, b is 0, and c is 0), "Macbiobride (registered trademark) MG-20P" (Z is a methyl glucoside residue, x is 4, a is 0, b is 5, and c is 0), and "WILBRIDE (registered trademark) S-753" (Z is a glycerin residue, x is 3, where a is 2.3, b is 1.7, c is 1, and a / b is 1.6), "WILBRIDE (registered trademark) BS-03" (Z is a butanol residue, x is 1, a is 10, b is 7, c is 0, and a / b is 1.4), and "UNILUBE (registered trademark) 50MB-11" (Z is a butanol residue, x is 1, a is 9, b is 10, c is 0, and a / b is 0.9) (all manufactured by NOF Corporation) can be used.

[0042] The pack cosmetic of the present invention may contain, as component (F), one type selected from the group consisting of various alkylene oxide derivatives represented by formula (1), either alone or in combination of two or more types.

[0043] When the pack cosmetic of the present invention contains component (F), the content of component (F) is preferably 0.01 to 5 mass%, more preferably 0.03 to 1 mass%, and even more preferably 0.05 to 0.5 mass%, relative to the total mass of the pack cosmetic. When the content of component (F) is within this range, the thick feeling when used at high temperatures, the ease of spreading when used at low temperatures, and the ease with which a lotion applied after rinsing fits on the skin are all further improved.

[0044] [Mass ratio of component (A) to component (C)] In the present invention, the mass ratio (A) / (C) of the content of component (A) to component (C) is preferably 50 to 600, more preferably 100 to 400, and even more preferably 150 to 350. When the mass ratio (A) / (C) is within the above range, the ease of spreading when used at low temperatures is further improved.

[0045] [Mass ratio of component (C) to component (D)] In the present invention, the mass ratio (C) / (D) of the content of component (C) to component (D) is preferably 5 to 400, more preferably 50 to 350, and even more preferably 100 to 300. When the mass ratio (C) / (D) is within the above range, the feeling of thick application when used at high temperatures becomes even better.

[0046] 〔water〕 The pack cosmetic of the present invention typically contains water in addition to the above components (A) to (F). The water used in the pack cosmetic of the present invention may be purified water such as ion-exchanged water or distilled water, or any other water suitable for producing cosmetics. The water content in the pack cosmetic of the present invention is not particularly limited, but is about 5 to about 70% by mass, preferably 10 to 60% by mass, and more preferably 20 to 50% by mass, relative to the total amount of the pack cosmetic. The total content of the above components (A) to (D) is preferably 31% by mass or more, more preferably 35% by mass or more, and even more preferably 40% by mass or more, relative to the total amount of the pack cosmetic.

[0047] [Other ingredients] The pack cosmetic of the present invention may contain other ingredients in addition to the above-mentioned components (A) to (F), provided that the effects of the present invention are not impaired. These other ingredients are those commonly used in cosmetics and cleansers, and include, for example, lower alcohols such as ethanol, moisturizers, oils, thickeners, sugars, surfactants, organic salts, inorganic salts, pH adjusters, chelating agents, antioxidants, disinfectants, blood flow promoters, UV absorbers, UV scattering agents, vitamins, amino acids such as arginine, pigments, and fragrances. When the pack cosmetic of the present invention contains such other ingredients, the content thereof is preferably 30% by mass or less, more preferably 20% by mass or less, and even more preferably 10% by mass or less, relative to the total amount of the pack cosmetic.

[0048] [Production of Pack Cosmetics] The pack cosmetic of the present invention can be produced by a known method. For example, the pack cosmetic of the present invention can be produced by mixing kaolin as component (A), a water-swellable clay mineral as component (B), one or more thickening polysaccharides selected from the group consisting of xanthan gum, guar gum, locust bean gum, tamarind seed gum, and gellan gum as component (C), an acidic mucopolysaccharide as component (D), a water-soluble anti-inflammatory component having a solubility in water at 25°C of 0.5% by mass or more as component (E), and an alkylene oxide derivative as component (F). The pack cosmetic of the present invention can be in the form of a paste or semi-solid formulation, and can be used on the face, body, etc. In this specification, the terms paste and semi-solid refer to an intermediate state between a liquid and a solid. [Example]

[0049] The following examples and comparative examples will be used to explain the embodiments of the present invention in more detail, but the present invention is not limited to these examples.

[0050] <Pack cosmetics> The pack cosmetics of Examples 1 to 22 and Comparative Examples 1 to 4, in which each component was blended in the amounts shown in Tables 1 and 2, were evaluated using the following evaluation methods. In addition, each panelist conducting the evaluations was trained in a preliminary evaluation test conducted prior to the evaluation test so that the level of evaluation corresponding to each score would be roughly the same, and this ensured that there would be no differences in evaluation criteria between panelists.

[0051] In the examples and comparative examples, the following components (A), (B), (C), (D) and (F) were used. Component (A): Kaolin ["Kaolin JP-100" manufactured by Takehara Chemical Industry Co., Ltd.] Component (B): Saponite [Kunimine Industries Co., Ltd. "Sumecton-SA" (synthetic saponite, 4% aqueous dispersion viscosity: 5,500 mPa·S)] Montmorillonite [Kunipia-F (purified montmorillonite, 4% aqueous dispersion viscosity: 300 mPa·S)] Ingredient (C): Xanthan gum [MP Gokyo Food & Chemical Co., Ltd. "Keltrol T" Ingredient (D): Sodium hyaluronate [HYUNDAI BIOLAND Co., Ltd. "BIO-SODIUM HYALURONATE POWDER MMW" (mass 1.3-1.8 MDa)] Component (F): PPG-20 methylglucose (NOF Corporation, "Macbiobride (registered trademark) MG-20P") Methyl gluceth-10 (NOF Corporation, "Macbiobride (registered trademark) MG-10E") PEG / PPG / Polybutylene Glycol-8 / 5 / 3 Glycerin (NOF Corporation, "WILBRIDE (registered trademark) S-753")

[0052] <Evaluation method> (1) Thick coating when used at high temperatures Twenty male and female panelists took 3 g of the pack cosmetic stored at 40°C for one day into their dry hands, spread it on their faces, and judged the feeling of thick application according to the following criteria. 2 points: If you feel that the product is applied too thickly. 1 point: If you feel that the paint is too thick. 0 points: If you feel that the product does not feel thickly applied. The total scores of the 20 people were calculated and evaluated according to the following criteria, and are shown in the table. ◎: The total score is 35 points or more. ○: The total score is between 30 and 34 points. △: The total score is between 20 and 29 points. ×: The total score is 19 points or less.

[0053] (2) Ease of spreading when used at low temperatures Twenty male and female panelists took 3 g of the pack cosmetic stored at 5°C for one day into their dry hands and spread it on their faces, and judged the ease of spreading it according to the following criteria. 2 points: If you feel it is very easy to spread. 1 point: If you feel it is easy to spread. 0 points: If you feel it is difficult to spread. The total scores of the 20 people were calculated and evaluated according to the following criteria, and are shown in the table. ◎: The total score is 35 points or more. ○: The total score is between 30 and 34 points. △: The total score is between 20 and 29 points. ×: The total score is 19 points or less.

[0054] (3) No tightness on the skin after rinsing Twenty male and female panelists took 3g of the pack cosmetic product into their dry hands, spread it over their faces, and left it on for 5 minutes. After rinsing it off with lukewarm water and wiping off the water, the panelists rated the lack of tightness of the skin according to the following criteria. 2 points: If you feel no tightness at all. 1 point: If you feel no tightness. 0 points: If you feel a sense of tightness. The total scores of the 20 people were calculated and evaluated according to the following criteria, and are shown in the table. ◎: The total score is 35 points or more. ○: The total score is between 30 and 34 points. △: The total score is between 20 and 29 points. ×: The total score is 19 points or less.

[0055] (4) The skin absorbs the lotion used after rinsing well Twenty male and female panelists served as a comparison subject, who washed their faces with lukewarm water, wiped off the water, then took 1 g of a commercially available lotion in their dry hands and applied it to their faces. As an evaluation subject, 3 g of pack cosmetics was taken in their dry hands, spread over their faces, and left as a pack for 3 minutes. After rinsing with lukewarm water and wiping off the water, 1 g of the same lotion as the comparison subject was taken in their dry hands and applied to their faces. The compatibility of the lotion was evaluated according to the following criteria. 2 points: If you feel that the lotion absorbs much better than when you do not use a face pack. 1 point: If you feel that the lotion absorbs better than when you do not use a face pack. 0 points: If you feel that the lotion does not absorb as well as when you do not use a face pack. The total scores of the 20 people were calculated and evaluated according to the following criteria, and are shown in the table. ◎: The total score is 35 points or more. ○: The total score is between 30 and 34 points. △: The total score is between 20 and 29 points. ×: The total score is 19 points or less.

[0056] [Table 1]

[0057] [Table 2]

[0058] The pack cosmetics of Examples 1 to 22 all had a thick coating feeling when used at a high temperature, and were easy to spread even when used at a low temperature. They did not leave the skin feeling tight after rinsing, and the lotion used after rinsing was easily absorbed into the skin.

[0059] In contrast, in Comparative Examples 1 to 4, sufficient performance was not obtained. In Comparative Example 1, the amount of component (A) was small, so that the product felt thick when used at high temperatures and the lotion applied after rinsing did not blend well with the skin. Comparative Example 2 did not contain component (B), and therefore had a thick coating feel when used at high temperatures and was insufficient in ease of spreading when used at low temperatures. Comparative Example 3 did not contain component (C), and therefore was insufficient in terms of ease of spreading when used at low temperatures, lack of tightness on the skin after rinsing, and good skin compatibility of the lotion used after rinsing. Comparative Example 4 did not contain component (D), and therefore was insufficient in terms of ease of spreading when used at low temperatures, lack of tightness on the skin after rinsing, and good skin compatibility of the lotion used after rinsing.

Claims

1. A pack cosmetic containing the following components (A) to (D): (A) Kaolin: 30 to 90% by mass (B) Water-swellable clay mineral: 0.1 to 20% by mass (C) One or more thickening polysaccharides selected from the group consisting of xanthan gum, guar gum, locust bean gum, tamarind seed gum, and gellan gum: 0.05 to 1% by mass (D) Acidic mucopolysaccharides: 0.0001 to 0.1% by mass

2. 2. The pack cosmetic according to claim 1, further comprising the following component (E): (E) Water-soluble anti-inflammatory component having a solubility in water at 25°C of 0.5% by mass or more: 0.05 to 10% by mass

3. 3. The pack cosmetic according to claim 1, further comprising the following component (F): (F) Alkylene oxide derivative represented by formula (1) Z-[O(EO)a-(PO)b-(BO)c-H]x (1) (In formula (1), Z is a residue obtained by removing all hydroxyl groups from a compound having 1 to 7 carbon atoms and 1 to 4 hydroxyl groups. x represents an integer of 1 to 4; EO is an oxyethylene group. PO is an oxyalkylene group having 3 carbon atoms. BO is an oxyalkylene group having 4 carbon atoms. a is the average number of moles of EO added, and 0≦a≦100; b is the average number of moles of PO added, and 0≦b≦60; and c is the average number of moles of BO added, and 0≦c≦5. However, there is no case where all of a, b, and c are 0. When neither a nor b is 0, the ratio (a / b) is 1 / 5 to 7 / 1.

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