Composition for cleansing keratin substances and / or removing makeup from keratin substances

Abstract

The present invention relates to a composition for cleansing keratinous materials and / or removing make-up from keratinous materials, comprising: a) at least one amino acid surfactant; b) at least one chelating agent selected from aminocarboxylic acids and salts thereof; c) at least one divalent metal salt; The present invention also relates to a non-therapeutic method for cleansing keratinous materials, in particular the skin, and / or removing make-up from keratinous materials, in particular the skin, comprising the steps of applying a composition according to the present invention to the keratinous materials, in particular the skin, and rinsing off said composition after an optional period of time.

Description

Technical Field

[0001] The present invention relates to a cosmetic composition, in particular a composition for cleansing keratinous substances and / or removing makeup from keratinous substances. The present invention also relates to a non-therapeutic method for cleansing keratinous substances and / or removing makeup from keratinous substances using said composition.

Background Art

[0002] Cleansing the skin or removing makeup from the skin is very important for skin care. It must be as efficient as possible because fatty residues such as excessive sebum, residues of daily used cosmetics and makeup products, especially water-proof products, can accumulate in the skin folds, clog the skin pores and cause the appearance of pimples.

[0003] Some types of skin cleansing or makeup removing products are known, such as anhydrous oils and gels that can be rinsed off, foaming creams, and lotions.

[0004] Anhydrous oils and gels that can be rinsed off have a cleansing or makeup removing action due to the oils present in these formulations. These oils enable the dissolution of fatty residues and the dispersion of makeup pigments. These products are effective and highly resistant.

[0005] However, they have the disadvantages of being heavy, non-foaming, and not providing a good skin finish upon application, which is disadvantageous from a cosmetic point of view.

[0006] On the other hand, foaming creams, lotions and gels have a cleansing or makeup removing action by surfactants that lift the fatty residues on the face. They are effective because they are foams, provide a pleasant feeling of use, and they are also easy to remove.

[0007] The properties of foam are very important for foaming cleansers. However, some foaming cleansers are not satisfactory in terms of foam density.

[0008] In order to have better foam density in a foaming cleanser containing an amino acid surfactant, traditional methods may involve including more surfactant or more polymer. However, these methods can increase the cost of formulation or result in an undesirable feeling of over-rinsing and skin squeakiness.

Prior Art Documents

Patent Documents

[0009]

Patent Document 1

Patent Document 2

Patent Document 3

Patent Document 4

Patent Document 5

Summary of the Invention

Problems to be Solved by the Invention

[0010] Therefore, there is a need to provide another solution for improving foam density.

Means for Solving the Problems

[0011] The inventors have found that such a need can be achieved by the present invention.

[0012] Thus, according to one aspect, the present invention is a composition for cleansing keratinous substances and / or removing makeup from keratinous substances, a) at least one amino acid surfactant, and b) at least one chelating agent selected from aminocarboxylic acids and salts thereof, and c) at least one divalent metal salt to provide a composition containing in an aqueous phase.

[0013] The composition according to the present invention can provide a good foam density.

[0014] The composition according to the present invention may be used as a daily face wash or makeup remover. The composition of the present invention is a rinse-off product. Thus, such a composition can be applied to the skin (i.e., the face and / or body) and then rinsed off with running water.

[0015] According to another aspect, the present invention provides a non-therapeutic method for cleansing keratinous substances, particularly the skin, and / or removing makeup from keratinous substances, particularly the skin, the method comprising applying a composition according to the present invention to the keratinous substance, particularly the skin, and rinsing off the composition after an optional period of time.

[0016] Other subjects, features, aspects and advantages of the present invention will become even clearer by reading the following description and examples.

Mode for Carrying Out the Invention

[0017] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In case the definitions of terms in this description conflict with the meanings commonly understood by those skilled in the art to which this invention belongs, the definitions described herein shall apply.

[0018] In the following description, unless otherwise indicated, particularly in the expressions “between... and...” and “... to...”, the limiting values of the value ranges are included within the ranges.

[0019] Furthermore, as used herein, the expression "at least one" is equivalent to the expression "one or more".

[0020] Throughout this application, the term "comprising" is to be interpreted as including any specifically recited features, plus any optional, additional, unspecified features. When used herein, the use of the term "comprising" also discloses embodiments where there are no features other than the specifically recited features (i.e., "consisting of").

[0021] Unless otherwise specified, all numerical values expressing amounts of ingredients, etc. used in this specification and claims are to be understood as being modified by the term "about". Accordingly, unless indicated to the contrary, the numerical values and parameters set forth herein are approximate values that can be varied as desired for the desired purpose.

[0022] For the purposes of the present invention, the term "keratinous substance" is intended to include human skin, mucous membranes, such as the lips. Facial skin is most particularly contemplated by the present invention.

[0023] All percentages in the present invention refer to mass percentages unless otherwise specified.

[0024] According to one aspect, the present invention relates to a composition for cleansing keratinous substances and / or removing makeup from keratinous substances, comprising a) at least one amino acid surfactant, and b) at least one chelating agent selected from aminocarboxylic acids and their salts, and c) at least one divalent metal salt in an aqueous phase.

[0025] Amino acid surfactant The composition according to the present invention contains at least one amino acid-based surfactant.

[0026] In one embodiment, the amino acid surfactant is derived from a carboxylate of an amino acid, and the amino group located on the α-carbon or β-carbon of the amino acid salt is C8-C 22 acylated with a fatty acid derivative.

[0027] These carboxylates of amino acids can be formed by conventional means such as neutralizing the respective amino acids with a base. The amino group located on the α-carbon or β-carbon of the neutralized amino acid is acylated with a fatty acid halide (acyl halide) in the presence of a base by the well-known Schotten-Baumann reaction to produce an amide, and in this way the desired surfactant reaction product, i.e., the amino acid surfactant, is formed. Examples of acyl halides suitable for acylating carboxylates of amino acids include acyl chlorides, acyl bromides, acyl fluorides, and acyl iodides. The acyl halide can be prepared by reacting a saturated or unsaturated, linear or branched C8-C 22 fatty acid with thionyl halide (bromination, chlorination, fluorination, and iodination). Representative acyl halides include, but are not limited to, decanoyl chloride, dodecanoyl chloride (lauroyl chloride), cocoil chloride (fatty acid chloride derived from coconut oil), tetradecanoyl chloride (myristoyl chloride), hexadecanoyl chloride (palmitoyl chloride), octadecanoyl chloride (stearoyl chloride), 9-octadecenoyl chloride (oleoyl chloride), eicosanoyl chloride (arachidoyl chloride), docosanoyl chloride (behenoyl chloride), and any mixture thereof. Other acyl halides include bromides, fluorides, and iodides of the aforementioned fatty acids. Methods for preparing acyl halides and alternative methods for acylating amino acids are described in U.S. Patent Application Publication No. 2008 / 0200704, published on August 21, 2008, which application is incorporated herein by reference.

[0028] Preferably, the amino acid surfactant has the formula (I):

[0029] [Chemical formula]

[0030] [In the formula, Z represents a saturated or unsaturated, straight-chain or branched hydrocarbon group having 8 to 22 carbon atoms, X is hydrogen or a methyl group, n is 0 or 1, Y is hydrogen, -CH3, -CH(CH3)2, -CH2CH(CH3)2, -CH(CH3)CH2CH3, -CH2C6H5, -CH2C2H4OH, -CH2OH, -CH(OH)CH3, -(CH2)4NH2, -(CH2)3NHC(NH)NH2, -CH2C(O)O - M + , -(CH2)2C(O)OH, -(CH2)2C(O)O - M + selected from, M is a salt-forming cation in which COO is a counter anion, for example, sodium, potassium, ammonium or triethanolamine] represented by.

[0031] In one embodiment, in formula (I), Z represents a straight-chain or branched C8-C 22 alkyl group, X is hydrogen or a methyl group, n is 0, Y is hydrogen, -(CH2)2C(O)OH, -(CH2)2C(O)O - M + selected from, M is a salt-forming cation in which COO is a counter anion, for example, sodium, potassium, ammonium or triethanolamine.

[0032] According to a preferred embodiment of the present invention, in formula (I), Z represents a straight-chain or branched C8-C22 represents an alkyl group, X is hydrogen or a methyl group, n is 0, Y is hydrogen, -(CH2)2C(O)OH, -(CH2)2C(O)O - M + selected from, M is a salt-forming cation in which COO is a counter anion, for example, sodium, potassium, ammonium or triethanolamine.

[0033] Examples of amino acid surfactants are salts of alanine, arginine, aspartic acid, glutamic acid, glycine, isoleucine, leucine, lysine, phenylalanine, serine, tyrosine, valine, sarcosine, and any mixtures thereof. More specifically, dipotassium capryloyl glutamate, dipotassium undecylenoyl glutamate, disodium capryloyl glutamate, disodium cocoyl glutamate, disodium lauroyl glutamate, disodium stearoyl glutamate, disodium undecylenoyl glutamate, potassium capryloyl glutamate, potassium cocoyl glutamate, potassium lauroyl glutamate, potassium myristoyl glutamate, potassium stearoyl glutamate, potassium undecylenoyl glutamate, sodium capryloyl glutamate, sodium cocoyl glutamate, sodium lauroyl glutamate, sodium myristoyl glutamate, sodium olive oil glutamate, sodium palmitoyl glutamate, sodium stearoyl glutamate, sodium undecylenoyl glutamate, cocoyl methyl β-alaninate, lauroyl β-alanine, lauroyl methyl β-alanine, myristoyl β-alanine, potassium lauroyl methyl β-alaninate, sodium cocoyl alaninate, sodium cocoyl methyl β-alaninate, and sodium myristoyl methyl β-alaninate, palmitoyl glycine (palmitoylamino acid surfactants such as glycinate, sodium lauroyl glycinate, sodium cocoyl glycinate, sodium myristoyl glycinate, potassium lauroyl glycinate, potassium cocoyl glycinate, potassium lauroyl sarcosinate, potassium cocoyl sarcosinate, sodium cocoyl sarcosinate, sodium lauroyl sarcosinate, sodium myristoyl sarcosinate, sodium oleoyl sarcosinate, sodium palmitoyl sarcosinate, ammonium lauroyl sarcosinate, sodium lauroyl aspartate, sodium myristoyl aspartate, sodium cocoyl aspartate, sodium caproyl aspartate, disodium lauroyl aspartate, disodium myristoyl aspartate, disodium cocoyl aspartate, disodium caproyl aspartate, potassium lauroyl aspartate, potassium myristoyl aspartate, potassium cocoyl aspartate, potassium caproyl aspartate, dipotassium lauroyl aspartate, dipotassium myristoyl aspartate, dipotassium cocoyl aspartate, dipotassium caproyl aspartate, and mixtures thereof can be mentioned.

[0034] For example, acyl sarcosine salts, such as sodium lauroyl sarcosinate sold under the name Sarkosyl NL 97 (registered trademark) by Ciba, or sold under the name Oramix L 30 (registered trademark) by SEPPIC, sodium myristoyl sarcosinate sold under the name Nikkol Sarcosinate MN (registered trademark) by Nikkol, or sodium palmitoyl sarcosinate sold under the name Nikkol Sarcosinate PN (registered trademark) by Nikkol; alanine salts, such as sodium N-lauroyl-N-methylaminopropionate sold under the name Sodium Nikkol Alaninate LN 30 (registered trademark) by Nikkol, or sold under the name Alanone ALE (registered trademark) by Kawaken Fine Chemical Co., Ltd., and N-lauroyl-N-methylalanine triethanolamine sold under the name Alanone Alta (registered trademark) by Kawaken Fine Chemical Co., Ltd.; N-acyl glutamate salts, such as triethanolamine monococoil glutamate sold under the name Acylglutamate CT-12 (registered trademark) by Ajinomoto Co., Inc., and triethanolamine lauroyl glutamate sold under the name Acylglutamate LT-12 (registered trademark) by Ajinomoto Co., Inc.; glycine salts, such as sodium N-cocoyl glycinate sold under the name Amilite GCS-12 (registered trademark) by Ajinomoto Co., Inc.; aspartate salts, such as a mixture of triethanolamine N-lauroyl aspartate and triethanolamine N-myristoyl aspartate sold under the name Asparack (registered trademark) by Mitsubishi Chemical Corporation; citrate salts, and any mixtures thereof, can be cited as commercially available amino acid surfactants.

[0035] According to the present invention, preferred amino acid surfactants are selected from sodium lauroyl sarcosinate, sodium cocoyl glycinate, sodium cocoyl glutamate, sodium stearoyl glutamate, disodium cocoyl glutamate, sodium lauroyl glutamate, potassium cocoyl glycinate, TEA cocoyl glutamate, or mixtures thereof.

[0036] Preferred commercially available amino acid surfactants in the composition include sodium lauroyl sarcosinate (ORAMIX L 30 sold by SEPPIC), sodium cocoyl glycinate (and) water (AMILITE® GCS-12K sold by Ajinomoto Co., Inc.), sodium cocoyl glutamate (and) disodium cocoyl glutamate (AMISOFT® CS-22 sold by Ajinomoto Co., Inc.), and sodium lauroyl glutamate (AMISOFT® LS-11 sold by Ajinomoto Co., Inc.).

[0037] According to a preferred embodiment, the amino acid surfactant is selected from sodium lauroyl sarcosinate, sodium cocoyl glycinate, sodium cocoyl glutamate, sodium stearoyl glutamate, disodium cocoyl glutamate, sodium lauroyl glutamate, potassium cocoyl glycinate, TEA cocoyl glutamate, or mixtures thereof.

[0038] Due to the use of the amino acid surfactant, the composition according to the present invention does not cause irritation to keratinous substances.

[0039] Advantageously, the amino acid surfactant is present in the composition according to the present invention in an amount in the range of 1% to 60% by weight, preferably 20% to 50% by weight, more preferably 35% to 45% by weight, based on the total weight of the composition.

[0040] Chelating agent The composition according to the invention comprises at least one chelating agent selected from aminocarboxylic acids and their salts.

[0041] The salts are, inter alia, alkali metal salts, alkaline earth metal salts, ammonium and substituted ammonium salts.

[0042] The chelating agent can in particular be selected from compounds having the following INCI names: Diethylenetriaminepentaacetic acid (DTPA), Ethylenediaminedisuccinic acid (EDDS) and trisodium ethylenediaminedisuccinate, for example Octaquest E30 from INNOSPEC ACTIVE CHEMICALS, Ethylenediaminetetraacetic acid (EDTA), Ethylenediamine-N,N'-diglutaric acid (EDDG), Glycineamide-N,N'-disuccinic acid (GADS), 2-Hydroxypropylenediamine-N,N'-disuccinic acid (HPDDS), Ethylenediamine-N,N'-bis(ortho-hydroxyphenylacetic acid) (EDDHA), N,N'-Bis(2-hydroxybenzyl)ethylenediamine-N,N'-diacetic acid (HBED), Nitrilotriacetic acid (NTA), Methylglycine diacetic acid (MGDA), N-2-Hydroxyethyl-N,N-diacetic acid and glyceryliminodiacetic acid (as described in documents EP-A-317542 and EP-A-399133), Iminodiacetic acid-N-2-hydroxypropylsulfonic acid and aspartic acid N-carboxymethyl N-2-hydroxypropyl-3-sulfonic acid (as described in EP-A-516102), Beta-alanine-N,N'-disuccinic acid, aspartic acid-N,N'-disuccinic acid and aspartic acid-N-monoacetic acid (as described in EP-A-509382), Chelating agents based on iminodisuccinic acid (IDSA) (as described in EP-A-509382), Ethanol diglycolic acid, and Tetrasodium glutamate diacetate (GLDA), for example, Dissolvine GL38 or 45S manufactured by Akzo Nobel.

[0043] Among the chelating agents mentioned, ethylenediamine-tetraacetic acid (EDTA), diethylenetriamine pentaacetic acid (DTPA), S,S'-ethylenediamine disuccinic acid (EDDS), trisodium ethylenediamine disuccinate, ethylenediamine tetramethylenephosphonic acid (EDTMP), and tetrasodium glutamate diacetate (GLDA), and mixtures thereof are preferably used.

[0044] Advantageously, the chelating agent is present in an amount in the range of 0.05% to 5% by weight, preferably 0.1% to 1% by weight, more preferably 0.2% to 0.4% by weight, based on the total weight of the composition.

[0045] Metal salt The composition according to the present invention contains at least one divalent metal salt.

[0046] The divalent and / or trivalent metal salt contains metal ion M1 2+ Preferably, M1 2+ is selected from Mg 2+ Ca 2+ Zn 2+ Fe 2+ Mn 2+ and Cu 2+ selected from.

[0047] The metal salt is selected from metal salts of organic acids or inorganic acids.

[0048] Examples of organic acids include ascorbic acid, formic acid, acetic acid, glycolic acid, gluconic acid, lactic acid, mandelic acid, oxalic acid, maleic acid, malonic acid, glyoxylic acid, succinic acid, adipic acid, fumaric acid, sebacic acid, citric acid, tartaric acid, malic acid, tricarboxylic acid, glutaric acid, glucaric acid, pyrrolidonecarboxylic acid, phenolsulfonic acid, salicylic acid, etc.

[0049] Examples of inorganic acids include sulfuric acid, carbonic acid, silicic acid, hydrochloric acid, nitric acid, phosphoric acid, etc.

[0050] Preferably, the metal salt of an inorganic acid is selected from metal chlorides, sulfates, nitrates, carbonates and bicarbonates, phosphates, silicates, and mixtures thereof, and the metal is selected from Mg, Ca, Zn, Mn, Cu, and Fe.

[0051] More preferably, the metal salt of an inorganic acid is selected from calcium chloride, calcium sulfate, calcium nitrate, calcium carbonate and calcium bicarbonate, calcium phosphate, zinc chloride, zinc sulfate, zinc nitrate, zinc carbonate and zinc bicarbonate, zinc phosphate, magnesium chloride, magnesium sulfate, magnesium nitrate, magnesium carbonate and magnesium bicarbonate, magnesium phosphate, magnesium aluminum silicate, and mixtures thereof.

[0052] Preferably, the metal salt of an organic acid is selected from metal ascorbates, formates, acetates, glycolates, gluconates, lactates, mandelates, oxalates, maleates, malonates, glyoxylates, succinates, adipates, fumarates, sebacates, citrates, tartrates, malates, tricarboxylates, glutamates, glucarates, pyrrolidone carboxylates, phenolsulfonates, salicylates, and mixtures thereof, and the metal is selected from Mg, Ca, Zn, Mn, Cu, and Fe.

[0053] More preferably, the metal salt of an organic acid is selected from magnesium gluconate, magnesium PCA (magnesium pyrrolidone carboxylate), magnesium acetate, calcium PCA (calcium pyrrolidone carboxylate), zinc lactate, zinc gluconate, zinc phenolsulfonate, zinc salicylate, zinc PCA (zinc pyrrolidone carboxylate), zinc citrate, zinc ascorbate, copper PCA (copper pyrrolidone carboxylate), copper gluconate, and mixtures thereof.

[0054] According to a preferred embodiment, the metal salt is selected from magnesium gluconate, magnesium PCA, magnesium sulfate, magnesium acetate, magnesium carbonate, magnesium aluminum silicate, calcium carbonate, calcium PCA, calcium chloride, calcium carbonate, zinc PCA, zinc gluconate, copper PCA, copper gluconate, and mixtures thereof.

[0055] Advantageously, the metal salt is present in the composition according to the invention in an amount in the range of 0.1% to 5% by weight, preferably 0.3% to 3% by weight, more preferably 0.5% to 1% by weight, based on the total weight of the composition.

[0056] aqueous phase The composition according to the invention comprises at least one aqueous phase.

[0057] According to a preferred embodiment, the composition according to the invention is an aqueous paste.

[0058] The aqueous phase of the composition according to the invention comprises water and, optionally, one or more water-miscible or at least partially water-miscible compounds, such as C2-C8 polyols or monoalcohols, such as ethanol and isopropanol.

[0059] The term "polyol" should be understood to mean any organic molecule containing at least two free hydroxyl groups. Examples of polyols that may be mentioned include glycols such as butylene glycol, propylene glycol, dipropylene glycol, isoprene glycol, hexylene glycol, caprylyl glycol, glycerol (i.e., glycerin), and polyethylene glycol.

[0060] According to a preferred embodiment, the composition according to the present application further comprises at least one C2-C8 polyol selected from butylene glycol, propylene glycol, dipropylene glycol (glcol), isoprene glycol, hexylene glycol, caprylyl glycol, glycerin and polyethylene glycol. More preferably, the C2-C8 polyol is glycerin.

[0061] Preferably, the C2-C8 polyol is present in an amount in the range of 1% to 70% by mass, preferably 30% to 40% by mass, based on the total mass of the composition.

[0062] The aqueous phase may correspond to 40% to 70% by mass, preferably 45% to 65% by mass, based on the total mass of the composition.

[0063] Additional components The composition according to the present invention may comprise one or more additional components selected from those conventionally used in skin cleansers.

[0064] The composition according to the present invention may comprise any of the following additives: a pH adjuster (e.g., citric acid); an additional surfactant; a biological extract; an antibacterial agent, a fragrance; a thickener (e.g., an acrylate copolymer); a structuring agent (e.g., potassium chloride, cetyl alcohol), and a cationic preservative.

[0065] A person skilled in the art can adjust the type and amount of the additional components present in the composition according to the present invention by routine operations so that the properties required for these compositions are not adversely affected by the additional components.

[0066] According to a preferred embodiment, the present invention is a composition for cleansing a keratinous substance and / or removing makeup from a keratinous substance, based on the total mass of the composition, a) At least one amino acid surfactant selected from sodium lauroyl sarcosinate, sodium cocoyl glycinate, sodium cocoyl glutamate, sodium stearoyl glutamate, disodium cocoyl glutamate, sodium lauroyl glutamate, potassium cocoyl glycinate, TEA cocoyl glutamate, and mixtures thereof, in an amount of 35% to 45% by mass, and b) At least one chelating agent selected from ethylenediamine-tetraacetic acid (EDTA), diethylenetriaminepentaacetic acid (DTPA), S,S'-ethylenediaminedisuccinic acid (EDDS), trisodium ethylenediaminedisuccinate, ethylenediaminetetramethylenephosphonic acid (EDTMP), and tetrasodium glutamate diacetate (GLDA), and mixtures thereof, in an amount of 0.2% to 0.4% by mass, and c) At least one divalent metal salt selected from magnesium gluconate, magnesium PCA, magnesium sulfate, magnesium acetate, magnesium carbonate, magnesium aluminum silicate, calcium carbonate, calcium PCA, calcium chloride, calcium carbonate, zinc PCA, zinc gluconate, copper PCA, copper gluconate, and mixtures thereof, in an amount of 0.5% to 1% by mass relates to a composition containing the above in an aqueous phase.

[0067] The composition according to the present invention may contain oil. Preferably, the composition according to the present invention does not contain any oil.

[0068] Method and Use The composition according to the present invention can be used in a method for cleansing a keratinous substance, such as the skin, especially the face, and / or removing makeup from a keratinous substance by applying it to the keratinous substance.

[0069] The composition according to the present invention can be a crystallization system in the form of a paste, cream or gel lotion.

[0070] It has been found that the composition according to the present invention can provide a good foam density.

[0071] The composition according to the invention may be applied by any means enabling a uniform distribution, in particular using a finger or a cotton ball, and can be removed by rinsing with water.

[0072] Thus, according to another aspect, the invention relates to a non-therapeutic method for cleansing keratinous substances, in particular the skin, and / or for removing makeup from keratinous substances, in particular the skin, comprising the steps of applying a composition according to the invention to the keratinous substances, in particular the skin, and rinsing off the said composition after an optional period of time.

[0073] The invention will be described in more detail by the examples set out below, which are given by way of non-limiting illustration.

Examples

[0074] The main raw materials used, their trade names and suppliers are listed in Table 1.

[0075]

Table 1

[0076] (Examples 1 - 4 and Comparative Examples 1 - 4 of the present invention) Compositions of Examples (IE) 1 - 4 and Comparative Examples (CE) 1 - 4 of the invention containing the components shown in Table 2 were prepared (all amounts are expressed as mass percentages of the active substances with respect to the total mass of each composition).

[0077]

Table 2

[0078] The compositions of Examples 1 - 4 of the invention belong to the invention.

[0079] The composition of Comparative Example 1 does not contain any divalent metal salts.

[0080] The composition of Comparative Example 2 does not contain any chelating agent selected from aminocarboxylic acids and their salts.

[0081] The composition of Comparative Example 3 does not contain any divalent metal salt.

[0082] The composition of Comparative Example 4 does not contain any divalent metal salt or any chelating agent selected from aminocarboxylic acids and their salts.

[0083] Preparation method Taking the composition of Example 1 of the present invention as an example, the composition was prepared as follows. Glycerin and sodium cocoamphoacetate were added to the main beaker with stirring, followed by an acrylate copolymer, and the mixture was heated to 70 - 85°C. Next, magnesium gluconate, trisodium ethylenediaminedisuccinate, and potassium chloride were added in sequence. Then, citric acid and cetyl alcohol were added at a temperature above 70°C, and then water was added to obtain the composition. The composition was cooled to 30°C and aged for 24 hours.

[0084] For the composition of Comparative Example 2, it was found that most of the divalent salts crystallized together with the amino acid surfactant.

[0085] Evaluation of the composition The prepared composition was evaluated for foam density.

[0086] Foam density The foam density was evaluated by observing the manually generated foam as follows.

[0087] Procedure: 1) Wet the hand with nitrile gloves and apply 0.5 g of the test composition on the glove. 2) Rub the composition 60 times with both hands flat (draw 2 circles / second). 3) Gather all the foam on the flat of one hand.

[0088] Figure 1 shows the foam generated by the composition of Example 1 of the present invention in the foam density test.

[0089] Figure 2 shows the foam generated by the composition of Comparative Example 4 in the foam density test.

[0090] Scores in the range of 1 to 15 are shown, where 1 to 4 means low foam density, 5 to 9 means medium foam density, and 10 to 15 means high foam density.

[0091] The results obtained are summarized in Table 3.

[0092]

Table 3

[0093] It can be seen from Table 3 that the compositions of Examples 1 to 4 of the present invention exhibit better foam density compared to the compositions of Comparative Examples 1 to 4.

[0094] It has been found that the compositions of Examples 1 to 4 of the present invention have no obvious change in appearance over two months at temperatures of 4°C and 45°C.

Claims

**Claim 1**: A composition for cleansing the skin and / or removing makeup from the skin, comprising: a) at least one amino acid surfactant; b) at least one chelating agent selected from aminocarboxylic acids and their salts, in an amount of 0.1% to 5% by mass based on the total mass of the composition; c) at least one divalent metal salt in an aqueous phase. **Claim 2** The amino acid surfactant is of formula (I): 【Chemical 1】 [wherein, Z represents a saturated or unsaturated, straight-chain or branched hydrocarbon group having 8 to 22 carbon atoms; X is hydrogen or a methyl group; n is 0 or 1; Y is hydrogen, -CH 3 , -CH(CH 3 ) 2 , -CH 2 CH(CH 3 ) 2 , -CH(CH 3 )CH 2 CH 3 , -CH 2 C 6 H 5 , -CH 2 C 2 H 4 OH, -CH 2 OH, -CH(OH)CH 3 , -(CH 2 ) 4 NH 2 , -(CH 2 ) 3 NHC(NH)NH 2 , -CH 2 C(O)O - M + , -(CH 2 ) 2 C(O)OH, -(CH 2 ) 2 C(O)O - M + and is selected from M is a salt-forming cation whose counter anion is COO, for example, sodium, potassium, ammonium or triethanolamine] The composition according to claim 1. **Claim 3** The amino acid surfactant is selected from sodium lauroyl sarcosinate, sodium cocoyl glycinate, sodium cocoyl glutamate, sodium stearoyl glutamate, disodium cocoyl glutamate, sodium lauroyl glutamate, potassium cocoyl glycinate, TEA cocoyl glutamate, or a mixture thereof. The composition according to claim 1 or 2. **Claim 4** The amino acid surfactant is present in an amount in the range of 1% to 60% by mass based on the total mass of the composition. The composition according to any one of claims 1 to 3. **Claim 5** The chelating agent is selected from diethylenetriaminepentaacetic acid (DTPA), ethylenediaminedisuccinic acid (EDDS), trisodium ethylenediaminedisuccinate, ethylenediaminetetraacetic acid (EDTA), ethylenediamine-N,N'-diglutaric acid (EDDG), glycine amide-N,N'-disuccinic acid (GADS), 2-hydroxypropylenediamine-N,N'-disuccinic acid (HPDDS), ethylenediamine-N,N'-bis(ortho-hydroxyphenylacetic acid) (EDDHA), N,N'-bis(2-hydroxybenzyl)ethylenediamine-N,N'-diacetic acid (HBED), nitrilotriacetic acid (NTA), methylglycine diacetic acid (MGDA), N-2-hydroxyethyl-N,N-diacetic acid, glyceryliminodiacetic acid, iminodiacetic acid-N-2-hydroxypropylsulfonic acid, aspartic acid N-carboxymethyl N-2-hydroxypropyl-3-sulfonic acid, beta-alanine-N,N'-diacetic acid, aspartic acid-N,N'-diacetic acid, aspartic acid-N-monoacetic acid, iminodisuccinic acid (IDSA)-based chelating agents, ethanol diglycolic acid, and tetrasodium glutamate diacetate (GLDA), and the composition according to any one of claims 1 to 4.

6. The chelating agent is present in a content in the range of 0.1% by mass to 1% by mass with respect to the total mass of the composition, and the composition according to any one of claims 1 to 5.

7. The divalent metal salt is Mg 2+ , Ca 2+ , Zn 2+ , Fe 2+ , Mn 2+ and Cu 2+ and contains a metal ion M1 2+ selected from the group consisting of, a composition according to any one of claims 1 to 6.

8. The divalent metal salt is present in an amount in the range of 0.1% by mass to 5% by mass with respect to the total mass of the composition, and the composition according to any one of claims 1 to 7.

9. The composition according to any one of claims 1 to 8, further comprising at least one C2-C8 polyol selected from butylene glycol, propylene glycol, dipropylene glycol, isoprene glycol, hexylene glycol, caprylyl glycol, glycerin, and polyethylene glycol.

10. The C2-C8 polyol is present in an amount in the range of 1% by mass to 70% by mass with respect to the total mass of the composition, and the composition according to claim 9.

11. With respect to the total mass of the composition a) At least one amino acid surfactant in an amount of 35% to 45% by mass, selected from sodium lauroyl sarcosinate, sodium cocoamido glycinate, sodium cocoamido glutamate, sodium stearoyl glutamate, disodium cocoamido glutamate, sodium lauroyl glutamate, potassium cocoamido glycinate, TEA cocoamido glutamate, or a mixture thereof, and b) At least one chelating agent in an amount of 0.2% to 0.4% by mass, selected from ethylenediamine-tetraacetic acid (EDTA), diethylenetriaminepentaacetic acid (DTPA), S,S'-ethylenediaminedisuccinic acid (EDDS), trisodium ethylenediaminedisuccinate, ethylenediaminetetramethylenephosphonic acid (EDTMP), and tetrasodium glutamate diacetate (GLDA), and mixtures thereof, and c) At least one divalent metal salt in an amount of 0.5% to 1% by mass, selected from magnesium gluconate, magnesium pyrrolidone carboxylate, magnesium sulfate, magnesium acetate, magnesium carbonate, magnesium aluminum silicate, calcium carbonate, calcium pyrrolidone carboxylate, calcium chloride, calcium carbonate, zinc pyrrolidone carboxylate, zinc gluconate, copper pyrrolidone carboxylate, copper gluconate, and mixtures thereof The composition according to claim 1, comprising in an aqueous phase. **Claim 12**: A non-therapeutic method for cleansing the skin and / or removing makeup from the skin, comprising the steps of applying the composition according to any one of claims 1 to 11 to the skin and rinsing off the composition after an optional period of time.

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