Cleansing composition

Abstract

To provide a cleansing composition with excellent stability. [Solution] A cleansing composition comprising: component (A), which consists of a polyglycerin fatty acid ester (A-1) in which two or more molecules of oleic acid are ester-bonded to one molecule of polyglycerin with a degree of polymerization of 5 to 10, or a polyglycerin fatty acid ester (A-2) in which two or more molecules of isostearic acid are ester-bonded to one molecule of polyglycerin with a degree of polymerization of 6 to 10; a liquid water-soluble component (B) containing glycerin and / or diglycerin; and a liquid oil (C), wherein the content of glycerin and / or diglycerin is 50% by mass or more based on the total mass of component (B).

Description

Technical Field

[0001] The present disclosure relates to a cleansing composition.

Background Art

[0002] As a cleansing composition, one containing a polyglycerol fatty acid ester and an oil agent is known. For example, in Patent Document 1, (A); a polyglycerol difatty acid ester composed of a fatty acid having 8 to 10 carbon atoms and polyglycerol having an average degree of polymerization of 4 to 10, (B); an esterified polyglycerol difatty acid ester composed of a fatty acid having 18 to 22 carbon atoms and polyglycerol having an average degree of polymerization of 8 to 15, and (C); an oil agent, in an oily cleansing cosmetic, an oily cleansing cosmetic characterized in that (A):(B) is 12:5 to 1:1 is disclosed.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] According to the studies of the present inventors, in a cleansing composition, when using a liquid water-soluble component containing glycerin and / or diglycerin together with a polyglycerol fatty acid ester and a liquid oil, it is difficult to achieve excellent stability. One aspect of the present disclosure aims to provide a cleansing composition having excellent stability.

Means for Solving the Problems

[0005] The present inventors have found that a cleansing composition with excellent stability can be obtained by using a specific polyglycerin fatty acid ester and by keeping the content of glycerin and / or diglycerin in the liquid water-soluble component within a specific range. This disclosure provides, in several aspects, the following [1] to

[21] . [1] A cleansing composition comprising: component (A), which consists of a polyglycerin fatty acid ester (A-1) in which two or more molecules of oleic acid are ester-bonded to one molecule of polyglycerin having a degree of polymerization of 5 to 10, or a polyglycerin fatty acid ester (A-2) in which two or more molecules of isostearic acid are ester-bonded to one molecule of polyglycerin having a degree of polymerization of 6 to 10; a liquid water-soluble component (B) containing glycerin and / or diglycerin; and a liquid oil (C), wherein the content of glycerin and / or diglycerin is 50% by mass or more based on the total mass of component (B). [2] The cleansing composition according to [1], further comprising a polyglycerin fatty acid ester (D) in which two or more molecules of fatty acids having 8 to 12 carbon atoms are ester-bonded to one molecule of polyglycerin having a degree of polymerization of 6 to 10. [3] The cleansing composition according to [1] or [2], wherein the (A) component is the (A-1) component and the (A-2) component. [4] The cleansing composition according to [3], wherein the mass ratio of the content of component (A-1) to the content of component (A-2) is 0.3 to 5.0. [5] The cleansing composition according to any one of [2] to [4], wherein the mass ratio of the content of component (A) to the content of component (D) is 1.0 to 3.0. [6] The cleansing composition according to any one of [2] to [5], wherein the total content of component (A) and component (D) is 12 to 40% by mass, based on the total mass of the cleansing composition. [7] The cleansing composition according to any one of [1] to [6], wherein the (A-1) component is polyglyceryl-10 dioleate. [8] The cleansing composition according to any one of [2] to [7], wherein component (D) is a polyglycerol fatty acid ester in which two or three molecules of fatty acids having 10 to 12 carbon atoms are ester-bonded to one molecule of polyglycerol having a degree of polymerization of 6 to 10. [9] The cleansing composition according to any one of [1] to [8], wherein the (A-2) component is a polyglycerin fatty acid ester in which two molecules of isostearic acid are ester-bonded to one molecule of polyglycerin having a degree of polymerization of 6 to 10.

[10] The cleansing composition according to any one of [1] to [9], wherein the content of component (B) is 8 to 50% by mass based on the total mass of the cleansing composition.

[11] The cleansing composition according to any one of [1] to

[10] , wherein the component (B) contains the glycerin, and the glycerin content based on the total mass of the component (B) is 60% by mass or more.

[12] The cleansing composition according to any one of [1] to

[11] , wherein the (B) component further comprises water.

[13] The cleansing composition according to any one of [1] to

[12] , wherein the mass ratio of the content of component (B) to the content of component (C) is 0.6 to 1.4.

[14] The cleansing composition according to any one of [1] to

[13] , wherein the (C) component is an ester oil.

[15] The cleansing composition according to any one of [1] to

[14] , wherein the viscosity of the cleansing composition is 100 to 10000 mPa·s.

[16] The cleansing composition according to any one of [1] to

[15] , wherein the cleansing composition is a water-in-oil emulsion or a microemulsion having a bicontinuous structure, and the average particle size of the oil droplets in the water-in-oil emulsion is 2 μm or less.

[17] A cleansing composition according to any one of [1] to

[16] , further comprising a solid water-soluble active ingredient and / or a proteolytic enzyme (E).

[18] The cleansing composition according to

[17] , wherein the solid water-soluble active ingredient is one or more selected from the group consisting of ascorbic acid, ascorbic acid salt, ascorbic acid derivative, niacinamide, salicylic acid, salicylic acid salt, salicylic acid derivative, dipotassium glycyrrhizinate, mucopolysaccharides, mucopolysaccharide derivatives, vitamin E derivative, vitamin A derivative, vitamin B6, and vitamin B6 derivative, and the proteolytic enzyme is one or more selected from the group consisting of papain, protease, and lipase.

[19] The cleansing composition according to

[17] or

[18] , wherein the solid water-soluble active ingredient is ascorbic acid and / or an ascorbate, and the proteolytic enzyme is one or more selected from the group consisting of papain, protease, and lipase.

[20] A cleansing composition according to any one of [1] to

[19] , further comprising a nonionic surfactant (F) other than the component (A-1) and the component (A-2) having an HLB of 7 to 12.

[21] The cleansing composition according to

[20] , wherein component (F) is polyoxyethylene hydrogenated castor oil having an HLB of 7 to 12 and / or polyoxyethylene glyceryl fatty acid ester having an HLB of 7 to 12. [Effects of the Invention]

[0006] According to one aspect of this disclosure, a cleansing composition with excellent stability is provided. [Modes for carrying out the invention]

[0007] The embodiments of this disclosure are described in detail below. This disclosure is not limited to the embodiments described below.

[0008] A cleansing composition according to one embodiment contains a polyglycerin fatty acid ester (A-1) (hereinafter also simply referred to as "component (A-1)") in which two or more molecules of oleic acid are ester-bonded to one molecule of polyglycerin with a degree of polymerization of 5 to 10, or component (A) which consists of component (A-1) and a polyglycerin fatty acid ester (A-2) (hereinafter also simply referred to as "component (A-2)") in which two or more molecules of isostearic acid are ester-bonded to one molecule of polyglycerin with a degree of polymerization of 6 to 10.

[0009] The degree of polymerization of the polyglycerin constituting component (A-1) is 5 to 10. The degree of polymerization of the polyglycerin constituting component (A-1) may be 5, 6, or 10. In this specification, the degree of polymerization of polyglycerin can be estimated, for example, by measuring the hydroxyl value.

[0010] The number of oleic acid molecules per polyglycerin molecule constituting component (A-1) is two or more, and may be six or fewer, four or fewer, or three or fewer. Component (A-1) may be, for example, a polyglycerin fatty acid ester in which two or three molecules of oleic acid are ester-bonded to one molecule of polyglycerin.

[0011] The HLB of component (A-1) may be 5 or more, 7 or more, or 9 or more, and may be 18 or less, 16 or less, or 14 or less.

[0012] Examples of polyglycerol fatty acid esters in which two molecules of oleic acid are ester-bonded to one molecule of polyglycerol include polyglyceryl-10 dioleate (HLB=12), polyglyceryl-6 dioleate (HLB=8), and polyglyceryl-5 dioleate (HLB=8). Examples of polyglycerol fatty acid esters in which three molecules of oleic acid are ester-bonded to one molecule of polyglycerol include polyglyceryl-10 trioleate (HLB=10) and polyglyceryl-6 trioleate (HLB=7).

[0013] The component (A-1) is preferably at least one selected from the group consisting of polyglyceryl-10 dioleate, polyglyceryl-6 dioleate, and polyglyceryl-5 dioleate, and more preferably polyglyceryl-10 dioleate. As polyglyceryl-10 dioleate, "Sunsoft Q-172Y-C" (manufactured by Sun Chemical Co., Ltd.) etc. can be used.

[0014] The content of the component (A-1) may be 0.5% by mass or more, 1% by mass or more, 2% by mass or more, or 3% by mass or more, and may be 50% by mass or less, 40% by mass or less, 30% by mass or less, or 20% by mass or less, based on the total mass of the cleansing composition.

[0015] When the component (A) consists of the component (A-1) and the component (A-2) (when the component (A) contains the component (A-2) in addition to the component (A-1)), the stability of the cleansing composition in a high-temperature environment (for example, 50°C or higher) may be more excellent. The degree of polymerization of the polyglycerol constituting the component (A-2) is 6 to 10. The degree of polymerization of the polyglycerol constituting the component (A-2) may be 6 or 10.

[0016] The number of isostearic acid molecules per molecule of the polyglycerol constituting the component (A-2) is 2 or more, and may be 6 or less, 4 or less, or 3 or less. The component (A-2) may be, for example, a polyglycerol fatty acid ester in which 2 or 3 molecules of isostearic acid are ester-bonded to 1 molecule of polyglycerol.

[0017] The HLB of the component (A-2) may be 5 or more, 7 or more, or 8 or more, and may be 18 or less, 16 or less, or 14 or less.

[0018] Examples of polyglycerol fatty acid esters in which two molecules of isostearic acid are ester-bonded to one molecule of polyglycerol include polyglyceryl-10 diisostearate (HLB = 11) and polyglyceryl-6 diisostearate (HLB = 8). Examples of polyglycerol fatty acid esters in which three molecules of isostearic acid are ester-bonded to one molecule of polyglycerol include polyglyceryl-10 triisostearate (HLB = 10), polyglyceryl-6 triisostearate (HLB = 7), and the like.

[0019] (Component (A-2) is preferably polyglyceryl-10 diisostearate and / or polyglyceryl-6 diisostearate, and more preferably polyglyceryl-10 diisostearate. As polyglyceryl-10 diisostearate, "Sunsoft-192Y-C" (manufactured by Taiyo Chemical Co., Ltd.) and the like can be used.

[0020] (The content of component (A-2) may be 0.1% by mass or more, 0.5% by mass or more, 0.8% by mass or more, 1.2% by mass or more, 1.6% by mass or more, or 2% by mass or more, based on the total mass of the cleansing composition, and may be 15% by mass or less, 12% by mass or less, 10% by mass or less, 8% by mass or less, or 7% by mass or less.

[0021] (A) The content of component (A) is preferably 4% by mass or more, more preferably 5% by mass or more, even more preferably 6% by mass or more, and particularly preferably 8% by mass or more, based on the total mass of the cleansing composition, from the viewpoint of providing better stability of the cleansing composition in a high-temperature environment (e.g., 60°C). (A) The content of component (A) is preferably 50% by mass or less, more preferably 45% by mass or less, even more preferably 40% by mass or less, and particularly preferably 35% by mass or less, based on the total mass of the cleansing composition, from the viewpoint of suppressing irritation and other sensations of the cleansing composition and improving the spreadability when applied, thereby further improving the user experience. (A) The content of component (A) may be 30% by mass or less, 25% by mass or less, 20% by mass or less, or 15% by mass or less.

[0022] The mass ratio of the content of component (A-1) to the content of component (A-2) (content of component (A-1) / content of component (A-2)) is preferably 11 or less, more preferably 8 or less, even more preferably 6 or less, even more preferably 5 or less, even more preferably 4 or less, particularly preferably 3 or less, and most preferably 2 or less, from the viewpoint of providing better stability of the cleansing composition in low temperature (e.g., 4°C) and high temperature (e.g., 60°C) environments. The mass ratio of the content of component (A-1) to the content of component (A-2) may be 1.8 or less. The mass ratio of the content of component (A-1) to the content of component (A-2) is preferably 0.1 or more, more preferably 0.2 or more, even more preferably 0.3 or more, preferably 0.4 or more, and particularly preferably 0.5 or more, from the viewpoint of suppressing an excessive decrease in the viscosity of the cleansing composition, making it less likely to spill from the hands, and providing a cleansing composition with high usability. The mass ratio of the content of component (A-1) to the content of component (A-2) may be, for example, 0.3 to 5.0.

[0023] A cleansing composition according to one embodiment contains a liquid water-soluble component (B) (hereinafter also simply referred to as "component (B)") containing glycerin and / or diglycerin. The content of glycerin and / or diglycerin is 50% by mass or more based on the total mass of component (B). In this specification, a liquid water-soluble component means a component that is a uniform liquid at atmospheric pressure and 25°C, and has a solubility in water of 1 g / 100 mL or more at atmospheric pressure and 25°C. Water is also included in the liquid water-soluble component. Surfactants are excluded from component (B) in this specification.

[0024] The glycerin and / or diglycerin content is 50% by mass or more, based on the total mass of component (B), and may be 60% by mass or more, 70% by mass or more, 80% by mass or more, 85% by mass or more, or 90% by mass or more. When the glycerin and / or diglycerin content is within the above numerical range, the stability of the cleansing composition in low temperature (e.g., 4°C) and high temperature (e.g., 40°C) environments tends to be better. Component (B) may be a liquid water-soluble component consisting of glycerin and / or diglycerin. The glycerin and / or diglycerin content may be less than 100% by mass, 99% by mass or less, or 98% by mass or less.

[0025] By increasing the content of liquid water-soluble components including glycerin and / or diglycerin in the cleansing composition, discoloration of ascorbic acid and / or ascorbate salts can be suppressed even when the content of ascorbic acid and / or ascorbate salts as component (E) described later is high (in particular, when the content of ascorbic acid and / or ascorbate salts is 2% by mass or more). The content of liquid water-soluble components including glycerin and / or diglycerin may be 5% by mass or more, 8% by mass or more, 10% by mass or more, 15% by mass or more, 18% by mass or more, 21% by mass or more, or 25% by mass or more, based on the total mass of the cleansing composition. In addition, the content of glycerin and / or diglycerin may be 60% by mass or less, 55% by mass or less, 50% by mass or less, or 45% by mass or less.

[0026] The mass ratio of the content of a liquid water-soluble component containing glycerin and / or diglycerin to the content of ascorbic acid and / or ascorbate (content of component (B) / content of component (E)) may be 5 or more, 7 or more, or 8 or more, from the viewpoint of making it easier to suppress discoloration of ascorbic acid and / or ascorbate, for example, it may be 200 or less, 150 or less, 130 or less, 100 or less, 90 or less, 80 or less, 70 or less, or 60 or less.

[0027] Component (B) may further contain water. When component (B) further contains water, the cleansing composition tends to be more stable in high-temperature environments (e.g., 50-60°C). The water content may be 1% or more by mass, 2% or more by mass, 3% or more by mass, 5% or more by mass, or 8% or more by mass, based on the total mass of component (B), and may be less than 50% by mass, 40% or less by mass, 35% or less by mass, 30% or less by mass, 25% or less by mass, 20% or less by mass, 15% or less by mass, or 10% or less by mass. When the water content is below the above upper limit, the cleansing composition can more stably contain components that tend to become unstable upon contact with water (e.g., ascorbic acid, ascorbates, proteolytic enzymes, etc., as component (E) described later).

[0028] Component (B) may further contain other liquid water-soluble components other than glycerin, diglycerin, and water. Examples of other liquid water-soluble components include polyglyceryl-6, polyglyceryl-10, polyglyceryl-20, propanediol, butylene glycol, pentanediol (1,2-pentanediol), hexanediol, propylene glycol, dipropylene glycol, tripropylene glycol, isoprene glycol, PEG / PPG / polybutylene glycol-8 / 5 / 3 glycerin, methyl gluceth-10, methyl gluceth-20, PPG-10 methyl glucose, PPG-20 methyl glucose, polyoxypropylene butyl ether, polyoxyethylene methyl glucoside, PEG-400, and PEG-200.

[0029] The content of other liquid water-soluble components may be 50% by mass or less, 40% by mass or less, 30% by mass or less, 20% by mass or less, 10% by mass or less, 8% by mass or less, 5% by mass or less, 3% by mass or less, 2% by mass or less, or 1% by mass or less, based on the total mass of component (B).

[0030] (B) The content of component (B) is preferably 6% by mass or more, more preferably 8% by mass or more, even more preferably 10% by mass or more, and particularly preferably 12% by mass or more, based on the total mass of the cleansing composition, from the viewpoint of providing better stability of the cleansing composition in low temperature (e.g., 4°C) and high temperature (e.g., 40-50°C or 60°C) environments. (B) The content of component (B) is preferably 60% by mass or less, more preferably 55% by mass or less, even more preferably 50% by mass or less, and particularly preferably 45% by mass or less, based on the total mass of the cleansing composition, from the viewpoint of providing a cleansing composition with excellent cleansing power. (B) The content of component (B) may be 35% by mass or less, 30% by mass or less, or 25% by mass or less, based on the total mass of the cleansing composition. (B) The content of component (B) may be, for example, 8-50% by mass, based on the total mass of the cleansing composition.

[0031] A cleansing composition according to one embodiment contains a liquid oil (C) (hereinafter also simply referred to as "component (C)"). In this specification, liquid oil means an oil that is liquid at atmospheric pressure and 25°C. In this specification, component (C) excludes surfactants, preservatives (e.g., phenoxyethanol), and preservative auxiliary agents (e.g., ethylhexylglycerin). Component (C) may be a non-polar oil or a polar oil. Examples of non-polar oils include, but are not limited to, isododecane, liquid paraffin, hydrogenated polyisobutene, and squalane.

[0032] Examples of polar oils include, but are not limited to, ester oils such as ethylhexyl palmitate, triethylhexanoin, cetyl ethylhexanoate, methylheptyl laurate, isononyl isononanoate, diisostearyl malate, isostearyl isostearate, diethylhexyl succinate, diethoxyethyl succinate, and bisethoxydiglycol cyclohexanedicarboxylic acid. Component (C) is preferably an ester oil.

[0033] The content of component (C) may be 10% by mass or more, 15% by mass or more, 20% by mass or more, 25% by mass or more, 30% by mass or more, 40% by mass or more, 50% by mass or more, 55% by mass or more, or 60% by mass or more, based on the total mass of the cleansing composition. Alternatively, the content of component (C) may be 85% by mass or less, 80% by mass or less, 75% by mass or less, or 70% by mass or less, based on the total mass of the cleansing composition.

[0034] The mass ratio of the content of component (B) to the content of component (C) (content of component (B) / content of component (C)) is preferably 0.01 or higher, more preferably 0.03 or higher, even more preferably 0.06 or higher, even more preferably 0.1 or higher, and particularly preferably 0.15 or higher, from the viewpoint of balancing the suppression of irritation and the improvement of cleansing power of the cleansing composition. Also, from the same viewpoint, it is preferably 2.0 or lower, more preferably 1.9 or lower, even more preferably 1.8 or lower, even more preferably 1.7 or lower, and particularly preferably 1.6 or lower. The mass ratio of the content of component (B) to the content of component (C) may be 1.6 or lower, 1.5 or lower, 1.3 or lower, 1 or lower, 0.8 or lower, or 0.7 or lower. The mass ratio of the content of component (B) to the content of component (C) may be, for example, 0.1 to 1.5, or 0.1 to 1.4.

[0035] The cleansing composition may further contain a polyglycerin fatty acid ester (D) (hereinafter also simply referred to as "component (D)") in which two or more molecules of fatty acids having 8 to 12 carbon atoms are ester-bonded to one molecule of polyglycerin having a degree of polymerization of 6 to 10. In this case, the stability of the cleansing composition under high temperature conditions (e.g., 60°C) tends to be better.

[0036] The degree of polymerization of the polyglycerin constituting component (D) may be 6 or 10. The number of carbon atoms in the fatty acids constituting component (D) may be 9 or more, or 10 or more, or 11 or less. The fatty acids constituting component (D) may be saturated fatty acids or unsaturated fatty acids.

[0037] The number of fatty acids per polyglycerin molecule constituting component (D) is 2 or more, and may be 6 or less, 4 or less, or 3 or less. Component (D) is preferably a polyglycerin fatty acid ester in which 2 or 3 molecules of fatty acids having 10 to 12 carbon atoms are ester-bonded to one polyglycerin molecule having a degree of polymerization of 6 to 10.

[0038] Examples of polyglycerol fatty acid esters, in which two molecules of fatty acids with 10 to 12 carbon atoms are ester-bonded to one molecule of polyglycerol with a degree of polymerization of 6 to 10, include polyglyceryl-6 dicaprate (HLB=10) and polyglyceryl-6 dilaurate (HLB=9). Examples of polyglycerol fatty acid esters, in which three molecules of fatty acids with 10 to 12 carbon atoms are ester-bonded to one molecule of polyglycerol with a degree of polymerization of 6 to 10, include polyglyceryl-6 trilaurate (HLB=8) and polyglyceryl-10 trilaurate (HLB=10).

[0039] Component (D) is preferably at least one of polyglyceryl-6 dicaprate and polyglyceryl-10 trilaurate. As polyglyceryl-6 dicaprate, products such as "Sunsoft Q-102H-C" (manufactured by Taiyo Kagaku Co., Ltd.) can be used, and as polyglyceryl-10 trilaurate, products such as "Sunsoft Q-123Y-C" (manufactured by Taiyo Kagaku Co., Ltd.) can be used.

[0040] (D) The content of component (D) is preferably 1% by mass or more, more preferably 2% by mass or more, even more preferably 3% by mass or more, and particularly preferably 4% by mass or more, based on the total mass of the cleansing composition, from the viewpoint of providing better stability of the cleansing composition in a high-temperature environment (e.g., 60°C). The content of component (D) may be 15% by mass or less, 13% by mass or less, 10% by mass or less, or 7% by mass or less, based on the total mass of the cleansing composition.

[0041] The total content of component (A) and component (D) is preferably 6% by mass or more, more preferably 9% by mass or more, even more preferably 10% by mass or more, and particularly preferably 12% by mass or more, based on the total mass of the cleansing composition, from the viewpoint of providing better stability of the cleansing composition in a high-temperature environment (e.g., 60°C). The total content of component (A) and component (D) may be 50% by mass or less, 45% by mass or less, 40% by mass or less, or 35% by mass or less, based on the total mass of the cleansing composition, from the viewpoint of suppressing the irritation of the cleansing composition and further improving the feel of use. The total content of component (A) and component (D) may be 30% by mass or less, 25% by mass or less, 20% by mass or less, or 18% by mass or less. The total content of component (A) and component (D) may be, for example, 12 to 40% by mass, based on the total mass of the cleansing composition.

[0042] The mass ratio of the content of component (A) to the content of component (D) (content of component (A) / content of component (D)) is preferably 0.5 or more, 0.8 or more, 1.0 or more, 1.1 or more, 1.3 or more, or 1.5 or more, from the viewpoint of having better stability of the cleansing composition and sufficient viscosity for good handling, and may be 4.0 or less, 3.5 or less, 3.0 or less, 2.5 or less, or 2.3 or less. The mass ratio of the content of component (A) to the content of component (D) may be, for example, 1.0 to 3.0.

[0043] The cleansing composition may further contain a solid water-soluble active ingredient and / or a proteolytic enzyme (E) (hereinafter also simply referred to as "component (E)"). The cleansing composition according to one embodiment has excellent cleansing power and can contain a large amount of component (B) above, so it is also possible to contain a relatively large amount of solid water-soluble active ingredient. Examples of solid water-soluble active ingredients include whitening ingredients, anti-inflammatory ingredients, peeling ingredients, etc. A solid water-soluble active ingredient means a water-soluble active ingredient that is solid at atmospheric pressure and 25°C. In this specification, component (E) excludes surfactants, preservatives (e.g., methylparaben, sodium benzoate, etc.), and preservative auxiliary agents (e.g., caprylhydroxamic acid).

[0044] Examples of solid water-soluble active ingredients include ascorbic acid, ascorbic acid salts, ascorbic acid derivatives, niacinamide, salicylic acid, salicylic acid salts, salicylic acid derivatives, dipotassium glycyrrhizinate, mucopolysaccharides, mucopolysaccharide derivatives, vitamin E derivatives, vitamin A derivatives, vitamin B6, vitamin B6 derivatives, allantoin, panthenol, arbutin, epsilonaminocaproic acid, tranexamic acid, tranexamic acid salts, citric acid, citrate salts, gluconic acid, gluconate salts, lactic acid, lactate salts, tartaric acid, tartrate salts, malic acid, malate salts, phytic acid, phytate salts, glycolic acid, and glycolate salts.

[0045] The solid water-soluble active ingredient may be one or more selected from the group consisting of, for example, ascorbic acid, ascorbate, ascorbic acid derivatives, niacinamide, salicylic acid, salicylate, salicylic acid derivatives, dipotassium glycyrrhizinate, mucopolysaccharides, mucopolysaccharide derivatives, vitamin E derivatives, vitamin A derivatives, vitamin B6, and vitamin B6 derivatives. The solid water-soluble active ingredient is preferably ascorbic acid and / or ascorbate.

[0046] According to the inventors' studies, the viscosity of the cleansing composition can be adjusted by adjusting the content of ascorbic acid and / or ascorbate. From the viewpoint of increasing the viscosity of the cleansing composition, the content of ascorbic acid and / or ascorbate may be 0.1% by mass or more, 0.5% by mass or more, 0.8% by mass or more, 1% by mass or more, 1.5% by mass or more, or 2% by mass or more, based on the total mass of the cleansing composition. By increasing the viscosity of the cleansing composition, the composition becomes easier to handle and can be made easier to use. The content of ascorbic acid and / or ascorbate may be, for example, 5% by mass or less, or 3.5% by mass or less, based on the total mass of the cleansing composition.

[0047] Examples of proteolytic enzymes include papain, proteases, and lipases. The proteolytic enzyme may be one or more selected from the group consisting of papain, proteases, and lipases.

[0048] The content of component (E) may be 0.1% by mass or more, 0.5% by mass or more, or 0.8% by mass or more, and may be 15% by mass or less, 10% by mass or less, 7% by mass or less, or 5% by mass or less, based on the total mass of the cleansing composition.

[0049] The cleansing composition may further contain a nonionic surfactant (F) (hereinafter also simply referred to as "component (F)") having an HLB of 7 to 12, other than components (A-1) and (A-2) described above. In this case, the stability of the cleansing composition (especially stability at high temperatures such as 60°C and low temperatures such as 4°C) tends to be further improved. Note that component (D) described above is excluded from component (F).

[0050] (F) Examples of components include polyoxyethylene hydrogenated castor oils with an HLB of 7 to 12, such as PEG-10 hydrogenated castor oil (HLB=7), PEG-20 hydrogenated castor oil (HLB=9), PEG-30 hydrogenated castor oil (HLB=11), and PEG-40 hydrogenated castor oil (HLB=12); PEG-5 glyceryl isostearate (HLB=8), PEG-20 glyceryl triisostearate (HLB=8), PEG- trioleate Examples include polyoxyethylene glyceryl fatty acid esters with an HLB of 7 to 12, such as 20-glyceryl (HLB=8) and PEG-40 glyceryl triisostearate (HLB=11); polyoxyethylene; and polyoxyethylene alkyl ethers with an HLB of 7 to 12, such as ceteth-5 (HLB=9), ceteth-10 (HLB=13), steareth-5 (HLB=9), and steareth-11 (HLB=13). Component (F) is preferably polyoxyethylene hydrogenated castor oil and / or polyoxyethylene glycerin fatty acid ester with an HLB of 7 to 12, and more preferably polyoxyethylene glycerin fatty acid ester with an HLB of 7 to 12.

[0051] The content of component (F) may be 0.1% by mass or more, 0.3% by mass or more, 0.4% by mass or more, or 0.5% by mass or more, based on the total mass of the cleansing composition. From the viewpoint of suppressing a decrease in the viscosity of the cleansing composition, the content of component (F) is preferably 10% by mass or less, more preferably 7% by mass or less, even more preferably 5% by mass or less, and particularly preferably 4% by mass or less, based on the total mass of the cleansing composition.

[0052] The mass ratio of the content of component (F) to the content of component (A) (content of component (F) / content of component (A)) is preferably 0.01 or higher, more preferably 0.02 or higher, even more preferably 0.03 or higher, and most preferably 0.04 or higher, from the viewpoint of achieving better stability of the cleansing composition. Furthermore, the mass ratio of the content of component (F) to the content of component (A) is preferably 1 or lower, more preferably 0.8 or lower, even more preferably 0.6 or lower, and most preferably 0.5 or lower, from the viewpoint of making it easier to increase the viscosity of the cleansing composition.

[0053] The cleansing composition may contain other surfactants other than the above-mentioned components (A-1), (A-2), (D), and (F). Examples of other surfactants include glycerin fatty acid esters such as glyceryl stearate, glyceryl isostearate, and glyceryl oleate; sorbitan fatty acid esters such as sorbitan stearate, sorbitan isostearate, sorbitan oleate, sorbitan diisostearate, and sorbitan triisostearate; silicone-based surfactants such as PEG-10 dimethicone, PEG-9 polydimethylsiloxyethyl dimethicone, lauryl PEG-9 polydimethylsiloxyethyl dimethicone, cetyl PEG / PPG-10 / 1 dimethicone, and polyglyceryl-3 polydimethylsiloxyethyl dimethicone; and polymer-based surfactants such as PEG-30 dipolyhydroxystearate. It is preferable that the cleansing composition does not contain silicone-based surfactants and / or polymer-based surfactants. From the viewpoint of rinsability, the content of other surfactants is preferably 10% by mass or less, 7% by mass or less, 5% by mass or less, or 3% by mass or less.

[0054] The cleansing composition may contain other ingredients. Examples of other ingredients include preservatives such as phenoxyethanol, iodide propynyl butylcarbamate, methylparaben, ethylparaben, butylparaben, and sodium benzoate; preservative adjuvants such as caprylhydroxamic acid and ethylhexylglycerin; waxes such as paraffin wax, microcrystalline wax, rice bran wax, sunflower seed wax, and beeswax; paste oils such as (hydroxystearic acid / stearic acid / dimer acid) decaglyceryl, dimer dilinoleyl (phytosteryl / isostearyl / cetyl / stearyl / behenyl), dimer dilinoleyl bis(behenyl / isostearyl / phytosteryl), macadamia nut fatty acid phytosteryl, and petrolatum; and oil-soluble active ingredients such as azelaic acid and stearyl glycyrrhetinate. The content of other components may be 10% by mass or less, 5% by mass or less, 3% by mass or less, or 1% by mass or less.

[0055] The cleansing composition may be an emulsion, or it may be a microemulsion. Examples of emulsions include water-in-oil emulsions (e.g., water-in-oil nanoemulsions). The microemulsion may be, for example, a micelle solution, or it may be a microemulsion having a bicontinuous structure. The cleansing composition may also have a liquid crystal structure.

[0056] The cleansing composition is preferably a water-in-oil nanoemulsion, a micelle solution, or a microemulsion having a bicontinuous structure, and more preferably a water-in-oil nanoemulsion or a microemulsion having a bicontinuous structure.

[0057] In this specification, a nanoemulsion refers to an emulsion containing a large number of emulsified particles (e.g., water droplets) with a particle size on the order of several hundred nanometers. While a water-in-oil emulsion has an appearance color of white to pale cloudy white, a water-in-oil nanoemulsion has an appearance color of blue transparency. Even if some oil droplets are on the order of several micrometers to tens of micrometers, a substance is considered a water-in-oil nanoemulsion if it contains a large number of oil droplets on the order of several hundred nanometers, resulting in a blue transparency. The average particle size of oil droplets in a water-in-oil nanoemulsion is preferably 2 μm or less, more preferably 1 μm or less, preferably 900 nm or less, more preferably 800 nm or less, and particularly preferably 700 nm or less. The average particle size of oil droplets in a water-in-oil nanoemulsion is preferably 20 nm or more, more preferably 40 nm or more, even more preferably 70 nm or more, and most preferably 100 nm or more. In water-in-oil nanoemulsions, water or water-soluble components are dispersed in oil. For example, when a liquid oil-soluble component containing an oil-soluble dye or a liquid water-soluble component containing a water-soluble dye is added dropwise and allowed to stand, if the viscosity of the composition is such that the dye can diffuse, the oil-soluble dye will diffuse throughout the system, but the water-soluble dye will hardly diffuse at all. Water-in-oil nanoemulsions can be confirmed, for example, by the absence of optical anisotropy observed with a polarizing microscope. They can also be confirmed by observation with electron microscopes such as cryo-SEM and FF-TEM.

[0058] The above cleansing composition contains component (A), which is a surfactant with a relatively high HLB, and component (D) as needed, and therefore has excellent rinsing properties. The reason why the cleansing composition uses component (A) and component (D), which are surfactants with relatively high HLB, rather than low HLB surfactants (e.g., HLB of about 3-6) that are commonly used in the preparation of water-in-oil emulsions, to form a stable water-in-oil emulsion (e.g., water-in-oil nanoemulsion) is thought to be because the hydrophobicity of the surfactants component (A) and component (D) changes due to the dehydration effect of component (B).

[0059] In this specification, a micelle solution refers to a solution that is transparent in appearance and does not exhibit a blue color like a nanoemulsion. The average particle size of the micelle particles may be less than 100 nm, preferably 1 nm or more, more preferably 3 nm or more, and even more preferably 5 nm or more.

[0060] In this specification, the average particle diameter of emulsion particles and the average particle diameter of micellar particles refer to the average particle diameter (cumulant diameter) calculated by the cumulant method from the autocorrelation function measured by dynamic light scattering at atmospheric pressure and 25°C. The viscosity and refractive index of the dispersion medium in the dynamic light scattering method can be set as appropriate, but for example, the viscosity and refractive index of the main component of the liquid oil component can be used.

[0061] In this specification, a microemulsion having a bicontinuous structure refers to a state in which both the oil phase and the aqueous phase (a phase composed of water-soluble components, even if it does not contain water, is considered the aqueous phase) are continuous phases. The appearance color of the microemulsion can be blue transparent or transparent. In a bicontinuous structure, because both phases are continuous phases, for example, if a liquid oil-soluble component containing an oil-soluble dye or a liquid water-soluble component containing a water-soluble dye is added dropwise and allowed to stand, both dyes will diffuse throughout the system if the viscosity of the composition is such that the dyes can diffuse. A bicontinuous structure can be confirmed, for example, by the absence of optical anisotropy observed with a polarizing microscope. It can also be confirmed by observation with an electron microscope such as cryo-SEM or FF-TEM.

[0062] In this specification, a cleansing composition having a liquid crystal structure means that it has a liquid crystal structure overall when left standing. If a cleansing composition forms a liquid crystal structure only temporarily due to flow or other reasons, it will not be treated as having a liquid crystal structure. Because liquid crystal structures exhibit a unique optical property called optical anisotropy, if the cleansing composition is observed with a polarizing microscope in a standing state and it is confirmed that it has optical anisotropy overall, then the cleansing composition can be said to have a liquid crystal structure such as a lamellar structure.

[0063] The cleansing composition does not need to have a liquid crystal structure. When a cleansing composition does not have a liquid crystal structure, it is less likely to undergo a phase transition even when subjected to temperature changes, and tends to have better stability in low or high temperature environments. Furthermore, even without a liquid crystal structure, the cleansing composition can have a relatively high viscosity.

[0064] A cleansing composition according to one embodiment has a relatively high viscosity and therefore can have good usability. The viscosity of the cleansing composition is preferably 100 mPa·s or more, more preferably 200 mPa·s or more, even more preferably 400 mPa·s or more, even more preferably 500 mPa·s or more, even more preferably 600 mPa·s or more, even more preferably 700 mPa·s or more, and particularly preferably 800 mPa·s or more. The viscosity of the cleansing composition is preferably 10000 mPa·s or less, more preferably 8000 mPa·s or less, even more preferably 5000 mPa·s or less, and particularly preferably 4000 mPa·s or less. The viscosity of the cleansing composition may be, for example, 100 to 10000 mPa·s, or 500 to 4000 mPa·s.

[0065] In this specification, the viscosity of the cleansing composition means that it is measured using a B-type viscometer at atmospheric pressure and 25°C. The viscosity of the cleansing composition may be, for example, the measurement taken 60 seconds after rotating an M3 spindle rotor at a rotation speed of 30 rpm. The measurement conditions can be adjusted as appropriate, and in viscosity ranges where measurement is difficult under the above conditions, the rotation speed may be changed, or an M2 or M4 spindle rotor may be used instead of an M3 spindle rotor.

[0066] The above cleansing composition can be manufactured, for example, by mixing the components described above, heating and dissolving them, and then cooling them. The timing of heating and dissolving can be adjusted as appropriate; for example, the cleansing composition may be manufactured by mixing some of the components, heating and dissolving them, cooling them, and then adding and mixing the remaining components (e.g., heat-sensitive components). [Examples]

[0067] The present invention will be specifically described below based on test examples. However, the present invention is not limited to these examples.

[0068] <Preparation of cleansing composition> 1. Test Examples 1-64 and 84 The types and amounts of each component shown in Tables 1-9 and 14 were mixed, heated and dissolved, and then cooled to room temperature while being stirred with a magnetic stirrer to prepare the cleansing compositions of Test Examples 1-64 and 84. The units of the amounts of each component shown in Tables 1-9 and 14 are in mass%.

[0069] 2. Test examples 65-77, 79, 80-83 and 85-86 From the components shown in Tables 10-12, 13, and 15, components other than component (B) and (E) ascorbic acid were mixed in the amounts shown in Tables 10-12, 13, and 15. After heating and dissolving, the mixture was cooled to room temperature while stirring with a magnetic stirrer to obtain mixture 1. In addition, (E) ascorbic acid was heated and dissolved in component (B) to obtain mixture 2. Mixture 2 was added to mixture 1 and mixed with a magnetic stirrer to prepare the cleansing compositions of Test Examples 65-77, 79, 80-83, and 85-86. The units of the amounts of each component shown in Tables 10-12, 13, and 15 are in mass%.

[0070] 3. Test Example 78 From the components shown in Table 12, components other than (B) and (E) were mixed in the amounts shown in Table 12. After heating and dissolving, the mixture was cooled to room temperature while stirring with a magnetic stirrer to obtain Mixture 1. Additionally, to a mixture obtained by heating and dissolving (E) ascorbic acid in 14.7% by mass of (B) glycerin and purified water, and then cooling to room temperature while stirring with a magnetic stirrer, a mixture of 0.3% by mass of (B) glycerin, propylene glycol, and (E) protease (Bioplasse XL-416F (manufactured by Nagase Chemitech Co., Ltd.), containing 20% ​​by mass, 30% by mass, and 50% by mass of protease, propylene glycol, and glycerin, respectively) was added and mixed with a magnetic stirrer to obtain Mixture 2. Mixture 2 was added to Mixture 1 and mixed with a magnetic stirrer to prepare the cleansing composition of Test Example 78. The units of the amounts of each component shown in Table 12 are in mass%.

[0071] <Rating> 1.Viscosity The viscosity of the cleansing composition was measured using a Type B viscometer at atmospheric pressure and 25°C. Using an M3 spindle rotor, the viscosity was recorded after 60 seconds of rotation at a predetermined speed. The rotation speed was 12 rpm for Test Example 14, 60 rpm for Test Examples 43, 45-47, and 30 rpm for the other test examples. The results are shown in Tables 1-15.

[0072] 2. Stability evaluation 30 mL of each prepared cleansing composition was dispensed into a glass bottle and stored for 1 day. The appearance of the cleansing composition was then examined. The stability after 1 day of storage at room temperature (25°C) was evaluated in the following four stages. The results are shown in Tables 1 to 15. If the stability after 1 day is A, B, or C, it can be said that the composition has excellent stability. Furthermore, if it is A or B, it can be said that the stability is better than C. In the case of A, the cleansing composition is considered to be a water-in-oil nanoemulsion or a microemulsion having a bicontinuous structure, and in the case of B, the cleansing composition may be a microemulsion having a bicontinuous structure. A: The cleansing composition is uniform and transparent blue. B: The cleansing composition is uniform and transparent. C: The cleansing composition is cloudy. D: The cleansing composition is separated into two or more phases.

[0073] 3. Severe testing For the cleansing compositions of the test examples that were evaluated as having excellent stability (stability evaluation was A, B, or C) as described in 2. above, harsh tests were conducted under low-temperature or high-temperature environments. First, 30 mL of each prepared cleansing composition was dispensed into glass bottles and stored at room temperature (25°C) for 1 day, and its appearance (condition after 1 day of preparation) was examined. The cleansing compositions examined after 1 day of preparation were then stored at 4°C for 1 week, and the appearance of the cleansing compositions (evaluation after 1 week of storage at 4°C) was evaluated in the following three stages. The results are shown in Tables 1 to 15. A: It maintains the condition it was in one day after preparation. C: The cleansing composition is cloudy. D: The cleansing composition is separated into two or more phases.

[0074] Furthermore, the appearance of the cleansing compositions was evaluated in the same manner as the "evaluation after one week of storage at 4°C" described above, except that instead of "storage at 4°C for one week," the samples were stored at "40°C for one week," "50°C for one week," or "60°C for three days." The results are shown in Tables 1-15.

[0075] 4. Freeze-thaw test Freeze-thaw tests were performed on the cleansing compositions of Test Examples 85 and 86 as follows. First, 30 mL of each prepared cleansing composition was dispensed into glass bottles and stored at -7°C for one week. After that, it was returned to room temperature (25°C), and the appearance of the cleansing compositions was evaluated in the following two stages. The results are shown in Table 15. A: The cleansing composition is uniform and not cloudy. C: The cleansing composition is cloudy. D: The cleansing composition is separated into two or more phases. Even if the sample did not freeze at -7°C, an appearance evaluation was performed after returning it to room temperature (25°C). Crystals were treated as a solid phase, and the occurrence of crystal precipitation was considered a D rating.

[0076] [Table 1]

[0077] [Table 2]

[0078] [Table 3]

[0079] [Table 4]

[0080] [Table 5]

[0081] [Table 6]

[0082] [Table 7]

[0083] [Table 8]

[0084] [Table 9]

[0085] Table 10

[0086] Table 11

[0087] Table 12

[0088] Table 13

[0089] Table 14

[0090] Table 15

Claims

1. The product contains a component (A) consisting of a polyglycerin fatty acid ester (A-1) in which two or more molecules of oleic acid are ester-bonded to one molecule of polyglycerin with a degree of polymerization of 5 to 10, or a polyglycerin fatty acid ester (A-2) in which two or more molecules of isostearic acid are ester-bonded to one molecule of polyglycerin with a degree of polymerization of 6 to 10, a liquid water-soluble component (B) containing glycerin and / or diglycerin, and a liquid oil (C). A cleansing composition in which the content of glycerin and / or diglycerin is 50% by mass or more based on the total mass of component (B).

2. The cleansing composition according to claim 1, further comprising a polyglycerin fatty acid ester (D) in which two or more molecules of fatty acids having 8 to 12 carbon atoms are ester-bonded to one molecule of polyglycerin having a degree of polymerization of 6 to 10.

3. The cleansing composition according to claim 2, wherein the (A) component comprises the (A-1) component and the (A-2) component.

4. The cleansing composition according to claim 3, wherein the mass ratio of the content of component (A-1) to the content of component (A-2) is 0.3 to 5.

0.

5. The cleansing composition according to any one of claims 2 to 4, wherein the mass ratio of the content of component (A) to the content of component (D) is 1.0 to 3.

0.

6. The cleansing composition according to any one of claims 2 to 4, wherein the total content of component (A) and component (D) is 12 to 40% by mass, based on the total mass of the cleansing composition.

7. The cleansing composition according to any one of claims 1 to 4, wherein the (A-1) component is polyglyceryl-10 dioleate.

8. The cleansing composition according to any one of claims 2 to 4, wherein component (D) is a polyglycerol fatty acid ester in which two or three molecules of fatty acids having 10 to 12 carbon atoms are ester-bonded to one molecule of polyglycerol having a degree of polymerization of 6 to 10.

9. The cleansing composition according to any one of claims 1 to 4, wherein the (A-2) component is a polyglycerin fatty acid ester in which two molecules of isostearic acid are ester-bonded to one molecule of polyglycerin having a degree of polymerization of 6 to 10.

10. The cleansing composition according to any one of claims 1 to 4, wherein the content of component (B) is 8 to 50% by mass based on the total mass of the cleansing composition.

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