Cleanser composition

Abstract

The present invention relates to a cleanser composition containing (A) one or more selected from the group consisting of N-acyl non-polar side chain amino acids having C8-C22 linear or branched saturated or unsaturated acyl groups and salts thereof, and (B) tara gum.　According to the present invention, it is possible to provide a skin cleanser composition having low skin irritation, good foamability, and creamy and elastic rich foam quality.

Description

Cleaning composition

[0001] The present invention relates to a cleansing composition for skin that is mild to the skin and has good foaming properties and foam quality.

[0002] Alkaline cream cleanser compositions containing a higher fatty acid salt as a primary ingredient have been widely used as skin cleansing compositions. However, due to their alkaline nature, these cleanser compositions have the problem of being highly irritating to the skin and leaving an unsatisfactory feeling after washing. On the other hand, amino acid-based surfactants are known as surfactants that are low in irritation and have a mild effect on the skin. However, cleanser compositions containing amino acid-based surfactants as a primary ingredient are unsatisfactory in terms of foaming ability and detergency, and various studies have been conducted to address these issues. For example, a cleanser composition containing an N-long-chain acyl amino acid or its salt, particularly an N-long-chain acyl neutral amino acid or its salt, and hydroxystarch phosphate (Patent Document 1) has been proposed, as has a skin cleanser composition containing an N-acyl amino acid salt, an oil that is solid or semi-solid at 30°C, and a cationized polysaccharide (Patent Document 2). However, the cleanser compositions described in the above patent documents still lack satisfactory foaming ability and foam density.

[0003] Furthermore, as detergent compositions that can improve not only the skin irritation but also the foaming properties and the feel during and after washing, the following have been proposed: a detergent composition containing a carbobetaine-type amphoteric surfactant and one or more cationic sugar derivatives selected from the group consisting of cationized locust bean gum, cationized tara gum, and cationized starch (Patent Document 3); and a detergent composition containing an anionic surfactant such as an alkyl ether sulfate salt, an alkyl sulfate ester salt, an alkyl ether sulfosuccinate salt, or an alkenyl succinic acid sugar ester salt, and / or an amphoteric surfactant such as a glycine-type amphoteric surfactant or an aminoacetic acid betaine-type amphoteric surfactant, and cationized tara gum (Patent Document 4).

[0004] However, there remains a demand for cleanser compositions that are mild to the skin, have excellent foaming properties and foam quality, and also have excellent moisturizing properties and ease of use.

[0005] JP 2006-077184 A JP 2013-163658 A JP 2011-084484 A JP 2004-203801 A

[0006] Therefore, an object of the present invention is to provide a skin cleanser composition that is mild to the skin, has good foaming properties, and produces creamy, elastic, dense foam. Another object of the present invention is to provide a skin cleanser composition that also has excellent moisturizing properties and ease of use.

[0007] As a result of intensive research to solve the above-mentioned problems, the present inventors have found that a cleanser composition for skin that is mild to the skin, has good foaming properties, and produces creamy, elastic, and dense foam can be obtained by preparing a cleanser composition containing one or more amino acids selected from the group consisting of N-acyl nonpolar side chain amino acids and salts thereof, and tara gum. Further research led to the completion of the present invention.

[0008] That is, the present invention relates to the following: [1] A detergent composition containing (A) one or more amino acids selected from the group consisting of N-acyl nonpolar side chain amino acids having a linear or branched chain saturated or unsaturated acyl group of 8 to 22 carbon atoms and salts thereof, and (B) tara gum. [2] The detergent composition according to [1], wherein (A) the one or more amino acids selected from the group consisting of N-acyl nonpolar side chain amino acids having a linear or branched chain saturated or unsaturated acyl group of 8 to 22 carbon atoms and salts thereof is selected from the group consisting of N-acyl glycines having a linear or branched chain saturated or unsaturated acyl group of 8 to 22 carbon atoms, N-acylalanines having a linear or branched chain saturated or unsaturated acyl group of 8 to 22 carbon atoms, N-acyl-N-methyl-β-alanines having a linear or branched chain saturated or unsaturated acyl group of 8 to 22 carbon atoms, and salts thereof. [3] The detergent composition according to [1] or [2], wherein the ratio of the content of (A) one or more amino acids selected from the group consisting of linear or branched, saturated or unsaturated acyl groups having 8 to 22 carbon atoms, and salts thereof, to the content of (B) tara gum [(A):(B)] is 25:0.05 to 5:1 by weight. [4] The detergent composition according to any one of [1] to [3], further containing (C) an amphoteric surfactant. [5] The detergent composition according to [4], further containing, as the amphoteric surfactant (C), one or more selected from the group consisting of glycine-type amphoteric surfactants and sulfobetaine-type amphoteric surfactants. [6] The detergent composition according to any one of [1] to [5], further containing (D) an emollient. [7] The detergent composition according to [6], further containing petrolatum as an emollient (D). [8] The detergent composition according to any one of [1] to [7], further containing (E) a thickening polymer compound. [9] The cleaning composition according to [8], which contains one or more thickening polymer compounds (E) selected from the group consisting of hydroxypropyl starch phosphate and alkyl acrylate copolymers.

[10] The cleaning composition according to any one of [1] to [3], which is in a paste form and further contains (C) an amphoteric surfactant, (D) an emollient, and (E) a thickening polymer compound.

[11] The detergent composition according to

[10] , which contains a glycine-type amphoteric surfactant and a sulfobetaine-type amphoteric surfactant as (C) the amphoteric surfactant.

[12] The detergent composition according to

[10] or

[11] , which contains petrolatum as (D) an emollient.

[13] The detergent composition according to any one of

[10] to

[12] , which contains hydroxypropyl starch phosphate and an alkyl acrylate copolymer as (E) a thickening polymer compound.

[0009] The present invention can provide a skin cleanser composition that is mild to the skin, has good foaming properties, and produces creamy, elastic, and dense foam.The present invention can also provide a skin cleanser composition that is excellent in moisturizing feeling and usability.

[0010] The present invention provides a skin cleanser composition (hereinafter also referred to as the "cleaner composition of the present invention"), which contains (A) one or more amino acids selected from the group consisting of N-acyl nonpolar side chain amino acids and salts thereof, and (B) tara gum.

[0011] In the present invention, the term "skin cleanser composition" refers to a composition used for washing the skin of the face, hands, body, etc., and hair.

[0012] The N-acyl nonpolar side chain amino acid contained as component (A) in the detergent composition of the present invention is an N-acylated derivative of a neutral amino acid whose side chain is nonpolar.

[0013] Examples of the non-polar side chain amino acid in the derivative include aliphatic amino acids such as glycine (aminoethanoic acid), sarcosine (N-methylglycine), alanine (2-aminopropanoic acid), β-alanine (3-aminopropanoic acid), methylalanine (2-methylaminopropanoic acid), methyl-β-alanine (3-methylaminopropanoic acid), valine (2-amino-3-methylbutanoic acid), leucine (2-amino-4-methylpentanoic acid), and isoleucine (2-amino-3-methylpentanoic acid); aromatic amino acids such as phenylalanine (2-amino-3-phenylpropanoic acid) and tryptophan (2-amino-3-(indolyl)propanoic acid); imino acids such as proline (pyrrolidine-2-carboxylic acid); and methionine (2-amino Examples of sulfur-containing amino acids include glycine (aminoethanoic acid), sarcosine (N-methylglycine), alanine (2-aminopropanoic acid), methyl-β-alanine (3-methylaminopropanoic acid), and proline (pyrrolidine-2-carboxylic acid). Glycine (aminoethanoic acid), alanine (2-aminopropanoic acid), methyl-β-alanine (3-methylaminopropanoic acid), and proline (pyrrolidine-2-carboxylic acid) are preferred, glycine (aminoethanoic acid), alanine (2-aminopropanoic acid), and methyl-β-alanine (3-methylaminopropanoic acid) are more preferred, glycine (aminoethanoic acid), alanine (2-aminopropanoic acid), and methyl-β-alanine (3-methylaminopropanoic acid) are even more preferred, and glycine (aminoethanoic acid) and alanine (2-aminopropanoic acid) are even more preferred. Amino acids having optical isomers may be in the L-, D-, or DL-form, with the L- and DL-forms being preferred, and the L-form being more preferred.

[0014] The acyl group in the N-acylated derivative of a non-polar side chain amino acid is preferably an acyl group having 8 to 22 carbon atoms, and examples of such an acyl group include octanoyl (capryloyl), 6-methylheptanoyl (isooctanoyl), 2-ethylhexanoyl, decanoyl (caprinoyl), dodecanoyl (lauroyl), tetradecanoyl (myristoyl), 12-methyltridecanoyl (isomyristoyl), hexadecanoyl (palmitoyl), 14-methylpentadecanoyl (isopalmitoyl), octadecanoyl (stearoyl), and 16-methylheptadecanoyl (isostearoyl). , eicosanoyl (arachidoyl), docosanoyl (behenoyl), and other linear or branched saturated acyl groups having 8 to 22 carbon atoms; and linear or branched unsaturated acyl groups having 8 to 22 carbon atoms, such as octenoyl, 6-methylheptenoyl (isooctenoyl), decenoyl, dodecenoyl, tetradecenoyl, 9-hexadecenoyl (palmitreinoyl), 9-octadecenoyl (oleoyl), and docosenoyl. Mixtures of saturated and unsaturated acyl groups having about 8 to 18 carbon atoms, such as coconut oil fatty acyl (cocoyl), palm oil fatty acyl, and palm kernel oil fatty acyl, may also be used. For the purposes of the present invention, the acyl group in the N-acylated derivative of a nonpolar side chain amino acid is preferably a linear or branched saturated or unsaturated acyl group having about 8 to 18 carbon atoms, or a mixture of a saturated acyl group and an unsaturated acyl group having about 8 to 18 carbon atoms, more preferably a linear saturated acyl group, coconut oil fatty acyl (cocoyl), palm oil fatty acyl, and palm kernel oil fatty acyl having about 8 to 18 carbon atoms, and even more preferably a linear saturated acyl group and coconut oil fatty acyl (cocoyl) having about 8 to 18 carbon atoms. The mixture of saturated acyl groups and unsaturated acyl groups having about 8 to 18 carbon atoms may be a mixture mainly composed of saturated acyl groups and unsaturated acyl groups having about 8 to 18 carbon atoms. Furthermore, the mixture of saturated acyl groups and unsaturated acyl groups having about 8 to 18 carbon atoms may be a mixture mainly composed of saturated acyl groups and unsaturated acyl groups having 12 to 16 carbon atoms, or may be a mixture mainly composed of saturated acyl groups having 12 to 16 carbon atoms.In the mixture, for example, "composed mainly of saturated acyl groups and unsaturated acyl groups having 8 to 18 carbon atoms" may mean that the proportion of saturated acyl groups and unsaturated acyl groups having 8 to 18 carbon atoms is 50% or more, 60% or more, 70% or more, or 80% or more; and "composed mainly of saturated acyl groups and unsaturated acyl groups having 12 to 16 carbon atoms" may mean that the proportion of saturated acyl groups and unsaturated acyl groups having 12 to 16 carbon atoms is 40% or more, 50% or more, 60% or more, 70% or more, or 80% or more.

[0015] The salt of the N-acylated derivative of a nonpolar side chain amino acid is not particularly limited as long as it is a pharmaceutically acceptable salt that can be used in a skin composition, and examples thereof include acid addition salts and salts with bases. Specific examples include salts with inorganic bases, organic bases, inorganic acids, organic acids, and salts with amino acids. Examples of salts with inorganic bases include salts with alkali metals such as lithium, sodium, and potassium, salts with alkaline earth metals such as magnesium and calcium, and ammonium salts. Examples of salts with organic bases include salts with alkanolamines such as monoethanolamine, diethanolamine, and triethanolamine, and salts with heterocyclic amines such as morpholine and piperidine. Examples of salts with inorganic acids include salts with hydrohalic acids (hydrochloric acid, hydrobromic acid, hydroiodic acid, etc.), sulfuric acid, nitric acid, phosphoric acid, etc. Examples of salts with organic acids include salts with monocarboxylic acids such as formic acid, acetic acid, and propanoic acid; salts with saturated dicarboxylic acids such as oxalic acid, malonic acid, and succinic acid; salts with unsaturated dicarboxylic acids such as maleic acid and fumaric acid; salts with tricarboxylic acids such as citric acid; and salts with keto acids such as α-ketoglutaric acid. Examples of salts with amino acids include salts with aliphatic amino acids such as alanine; salts with aromatic amino acids such as tyrosine; salts with basic amino acids such as lysine; and salts with acidic amino acids such as aspartic acid and glutamic acid. The above-mentioned salts may each be a hydrate (hydrate salt), and examples of such hydrates include monohydrates to hexahydrates. From the viewpoints of availability, ease of handling, and the like, preferred salts of N-acyl nonpolar side chain amino acids include alkali metal salts such as sodium salts and potassium salts, and salts with alkanolamines such as monoethanolamine, diethanolamine, and triethanolamine, with sodium salts, potassium salts, and triethanolamine salts being more preferred, and sodium salts and potassium salts being even more preferred.

[0016] In the present invention, as component (A), the above-mentioned N-acyl nonpolar side chain amino acids having a linear or branched, saturated or unsaturated acyl group having 8 to 22 carbon atoms and the above-mentioned salts thereof are preferably used, and the above-mentioned N-acylglycines having a linear or branched, saturated or unsaturated acyl group having 8 to 22 carbon atoms, the above-mentioned N-acyl-L-alanines having a linear or branched, saturated or unsaturated acyl group having 8 to 22 carbon atoms, the above-mentioned N-acyl-N-methyl-β-alanines having a linear or branched, saturated or unsaturated acyl group having 8 to 22 carbon atoms, and the above-mentioned salts thereof are more preferably used, and the acyl group is preferably a linear or branched, saturated or unsaturated acyl group having 8 to 18 carbon atoms. More preferably used are N-acylglycine having one or more saturated acyl groups selected from the group consisting of a saturated acyl group, coconut oil fatty acyl (cocoyl), palm oil fatty acyl, and palm kernel oil fatty acyl; N-acyl-L-alanine having one or more saturated acyl groups having 8 to 18 carbon atoms selected from the group consisting of a saturated acyl group, coconut oil fatty acyl (cocoyl), palm oil fatty acyl, and palm kernel oil fatty acyl; N-acyl-N-methyl-β-alanine having one or more saturated acyl groups having 8 to 18 carbon atoms selected from the group consisting of a saturated acyl group, coconut oil fatty acyl (cocoyl), palm oil fatty acyl, and palm kernel oil fatty acyl; and the above-mentioned salts thereof.

[0017] Specific examples of N-acyl nonpolar side chain amino acids and salts thereof that are more preferably used as component (A) include N-lauroylglycine, sodium N-lauroylglycine, potassium N-lauroylglycine, triethanolamine N-lauroylglycine, N-myristoylglycine, sodium N-myristoylglycine, potassium N-myristoylglycine, triethanolamine N-myristoylglycine, N-palmitoylglycine, sodium N-palmitoylglycine, potassium N-palmitoylglycine, triethanolamine N-palmitoylglycine, triethanolamine N-stearoylglycine, sodium N-stearoylglycine, and N-stearoylglycine. aroylglycine potassium, N-stearoylglycine triethanolamine, N-coconut oil fatty acylglycine, N-coconut oil fatty acylglycine sodium, N-coconut oil fatty acylglycine potassium, N-coconut oil fatty acylglycine triethanolamine, N-palm oil fatty acylglycine, N-palm oil fatty acylglycine sodium, N-palm oil fatty acylglycine potassium, N-palm oil fatty acylglycine triethanolamine, N-palm kernel oil fatty acylglycine, N-palm kernel oil fatty acylglycine sodium, N-palm kernel oil fatty acylglycine potassium, N-palm kernel oil fatty acylglycine triethanolamine;N-Lauroyl-L-alanine, N-Lauroyl-L-alanine sodium, N-Lauroyl-L-alanine potassium, N-Lauroyl-L-alanine triethanolamine, N-Myristoyl-L-alanine, N-Myristoyl-L-alanine sodium, N-Myristoyl-L-alanine potassium, N-Myristoyl-L-alanine triethanolamine, N-Palmitoyl-L-alanine, N-Palmitoyl-L-alanine sodium, N-Palmitoyl-L-alanine potassium, N-Palmitoyl-L-alanine triethanolamine, N-Stearoyl-L-alanine, N-Stearoyl-L-alanine sodium, N-Stearoyl-L-alanine potassium, N-Stearoyl-L -alanine triethanolamine, N-coconut oil fatty acyl-L-alanine, N-coconut oil fatty acyl-L-alanine sodium, N-coconut oil fatty acyl-L-alanine potassium, N-coconut oil fatty acyl-L-alanine triethanolamine, N-palm oil fatty acyl-L-alanine, N-palm oil fatty acyl-L-alanine sodium, N-palm oil fatty acyl-L-alanine potassium, N-palm oil fatty acyl-L-alanine triethanolamine, N-palm kernel oil fatty acyl-L-alanine, N-palm kernel oil fatty acyl-L-alanine sodium, N-palm kernel oil fatty acyl-L-alanine potassium, N-palm kernel oil fatty acyl-L-alanine triethanolamine;N-lauroyl-N-methyl-β-alanine, N-lauroyl-N-methyl-β-alanine sodium, N-lauroyl-N-methyl-β-alanine potassium, N-lauroyl-N-methyl-β-alanine triethanolamine, N-myristoyl-N-methyl-β-alanine, N-myristoyl-N-methyl-β-alanine sodium, N-myristoyl-N-methyl-β-alanine potassium, N-myristoyl-N-methyl-β-alanine triethanolamine Triethanolamine, N-palmitoyl-N-methyl-β-alanine, N-palmitoyl-N-methyl-β-alanine sodium, N-palmitoyl-N-methyl-β-alanine potassium, N-palmitoyl-N-methyl-β-alanine triethanolamine, N-stearoyl-N-methyl-β-alanine, N-stearoyl-N-methyl-β-alanine sodium, N-stearoyl-N-methyl-β-alanine potassium, N-stearoyl -N-methyl-β-alanine triethanolamine, N-coconut oil fatty acid acyl-N-methyl-β-alanine, N-coconut oil fatty acid acyl-N-methyl-β-alanine sodium, N-coconut oil fatty acid acyl-N-methyl-β-alanine potassium, N-coconut oil fatty acid acyl-N-methyl-β-alanine triethanolamine, N-palm oil fatty acid acyl-N-methyl-β-alanine, N-palm oil fatty acid acyl-N-methyl-β-alanine sodium, Examples include N-palm oil fatty acyl-N-methyl-β-alanine potassium, N-palm oil fatty acyl-N-methyl-β-alanine triethanolamine, N-palm kernel oil fatty acyl-N-methyl-β-alanine, N-palm kernel oil fatty acyl-N-methyl-β-alanine sodium, N-palm kernel oil fatty acyl-N-methyl-β-alanine potassium, N-palm kernel oil fatty acyl-N-methyl-β-alanine triethanolamine, and the like;

[0018] For the purposes of the present invention, N-acylglycine having as the acyl group one or more selected from the group consisting of a linear saturated acyl group having 8 to 18 carbon atoms, coconut oil fatty acyl (cocoyl), palm oil fatty acyl, and palm kernel oil fatty acyl, N-acyl-L-alanine having as the acyl group one or more selected from the group consisting of a linear saturated acyl group having 8 to 18 carbon atoms, coconut oil fatty acyl (cocoyl), palm oil fatty acyl, and palm kernel oil fatty acyl, and the above-mentioned salts thereof are even more preferably used, and N-myristoylglycine, N-myristoylglycine, N-Myristoylglycine sodium, N-Myristoylglycine potassium, N-Myristoylglycine triethanolamine, N-Palmitoylglycine, N-Palmitoylglycine sodium, N-Palmitoylglycine potassium, N-Palmitoylglycine triethanolamine, N-Cocoyl acylglycine, N-Cocoyl acylglycine sodium, N-Cocoyl acylglycine potassium, N-Cocoyl acylglycine triethanolamine, N-Myristoyl-L-alanine, N-Myristoyl-L-alanine sodium, N-Myristoyl- L-alanine potassium, N-myristoyl-L-alanine triethanolamine, N-palmitoyl-L-alanine, N-palmitoyl-L-alanine sodium, N-palmitoyl-L-alanine potassium, N-palmitoyl-L-alanine triethanolamine, N-coconut oil fatty acid acyl-L-alanine, N-coconut oil fatty acid acyl-L-alanine sodium, N-coconut oil fatty acid acyl-L-alanine potassium, N-coconut oil fatty acid acyl-L-alanine triethanolamine, and the like are more preferably used, and N-myristoylglycine, ... sodium N-myristoylglycine, potassium N-myristoylglycine, N-palmitoylglycine, sodium N-palmitoylglycine, potassium N-palmitoylglycine, N-cocoacylglycine, sodium N-cocoacylglycine, potassium N-cocoacylglycine, N-myristoyl-L-alanine, sodium N-myristoyl-L-alanine, potassium N-myristoyl-L-alanine, N-palmitoyl-L-alanine, sodium N-palmitoyl-L-alanine, potassium N-palmitoyl-L-alanine,Examples of even more preferably used compounds include N-coconut oil fatty acid acyl-L-alanine, N-coconut oil fatty acid acyl-L-alanine sodium, and N-coconut oil fatty acid acyl-L-alanine potassium.

[0019] In the present invention, the N-acyl nonpolar side chain amino acid or salt thereof may be synthesized by a method known per se, for example, by the Schotten-Baumann reaction under alkaline conditions between a nonpolar side chain amino acid and a fatty acid halide converted from a fatty acid by a standard method, or may be a commercially available product provided by Ajinomoto Co., Inc. or the like for use in cosmetics or skin cleansers. In the cleanser composition of the present invention, one of the above-mentioned N-acyl nonpolar side chain amino acids or salts thereof may be selected and used alone, or two or more of them may be selected and used in combination.

[0020] The content of component (A) in the detergent composition of the present invention can be determined appropriately depending on the type and properties of the one or more amino acids selected from the group consisting of N-acyl nonpolar side chain amino acids and salts thereof used as component (A), but is preferably 3 wt % or more, 4 wt % or more, 5 wt % or more, 6 wt % or more, or 7 wt % or more. The content of component (A) in the detergent composition of the present invention is preferably 30 wt % or less, 25 wt % or less, 20 wt % or less, 15 wt % or less, 13 wt % or less, or 12 wt % or less. In one embodiment of the detergent composition of the present invention, the content of component (A) is preferably 3 wt % to 30 wt %, more preferably 5 wt % to 20 wt %, even more preferably 5 wt % to 15 wt %, even more preferably 6 wt % to 13 wt %, and even more preferably 7 wt % to 12 wt %.

[0021] The tara gum contained as component (B) in the cleanser composition of the present invention is a thickening polysaccharide extracted and purified from the endosperm of the seeds (tara beans) of the legume tara (Caesalpinia spinosa Kuntze.). The tara gum contained as component (B) in the cleanser composition of the present invention may be a thickening polysaccharide chemically equivalent to the thickening polysaccharide extracted from the endosperm of the seeds (tara beans) of the legume tara (Caesalpinia spinosa Kuntze.). In the present invention, commercially available tara gum products available for use in cosmetics or skin cleansers can be used. The content of component (B) in the cleanser composition of the present invention can be determined appropriately depending on the grade, thickening properties, etc. of the tara gum used as component (B), but is preferably 0.05 wt % or more, 0.1 wt % or more, or 0.2 wt % or more. The content of component (B) in the cleaning composition of the present invention is preferably 2 wt % or less, 1 wt % or less, 0.5 wt % or less, or 0.4 wt % or less. In one embodiment of the cleaning composition of the present invention, the content of component (B) is preferably 0.05 wt % to 2 wt %, more preferably 0.05 wt % to 1 wt %, even more preferably 0.1 wt % to 1 wt %, still more preferably 0.1 wt % to 0.5 wt %, even more preferably 0.1 wt % to 0.4 wt %, and particularly preferably 0.2 wt % to 0.4 wt %.

[0022] In the present invention, from the viewpoint of the foaming ability and foam quality of the detergent composition, the content ratio of the component (A) to the component (B) [(A):(B)] by weight is, for example, 30:0.05 to 3:2, 25:0.05 to 5:1, 20:0.1 to 5:1, 20:0.1 to 5:0.5, 20:0.1 to 6:0.5, 15:0.1 to 5:0.5, 15:0.1 to 6:0.5, 13:0.1 to 6:0.4, or 12:0.2 to 7:0. .4, preferably 30:0.05 to 3:2, more preferably 25:0.05 to 5:1, even more preferably 20:0.1 to 5:1, even more preferably 20:0.1 to 5:0.5, even more preferably 15:0.1 to 5:0.5, even more preferably 13:0.1 to 6:0.4, and especially preferably 12:0.2 to 7:0.4.

[0023] The cleanser composition of the present invention may further contain (C) an amphoteric surfactant in addition to the above-mentioned components (A) and (B), from the viewpoints of improving foaming properties and detergency and reducing irritation to the skin.

[0024] The amphoteric surfactant that can be contained as component (C) in the cleanser composition of the present invention is not particularly limited as long as it is a surfactant having both an anionic group and a cationic group in the molecule and is used in skin compositions, and does not impair the characteristics of the present invention.For example, glycine-type amphoteric surfactants such as alkyl glycine salts, alkyl carboxymethyl glycine salts, and N-acylaminoethyl-N-2-hydroxyethyl glycine salts (N-lauroyl-N'-carboxymethyl-N'-hydroxyethylethylenediamine sodium, N-coconut oil fatty acid acyl-N'-carboxymethyl-N'-hydroxyethylethylenediamine sodium (2-coconut oil alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine)); hydroxyalkyl (C12-14) hydroxyethyl sarcosine; aminopropionic acid-type amphoteric surfactants such as alkyl aminopropionates, alkyliminodipropionates, and N-acylaminoethyl-N-2-hydroxyethylpropionates (N-coconut oil fatty acid acyl-N'-carboxyethyl-N'-hydroxyethylethylenediamine sodium); alkyl dimethylaminoacetic acid betaine (lauryl dimethylaminoacetic acid betaine, coconut oil alkyl dimethylaminoacetic acid betaine), fatty acid amidopropyl dimethylaminoacetic acid betaine (lauroyl dimethylaminoacetic acid betaine), Aminoacetic acid betaine type amphoteric surfactants such as phosphoric acid amidopropyl dimethylaminoacetic acid betaine, coconut oil fatty acid amidopropyl dimethylaminoacetic acid betaine, palm kernel oil fatty acid amidopropyl dimethylaminoacetic acid betaine, etc.), alkyl dihydroxyethyl aminoacetic acid betaine; sulfobetaine type amphoteric surfactants such as N-alkyl-N,N-dimethylammonium-N-propyl sulfonate, N-alkyl-N,N-dimethylammonium-N-(2-hydroxypropyl) sulfonate (N-lauryl-N,N-dimethylammonium-N-(2-hydroxypropyl) sulfonate, etc.), fatty acid amidopropyl-N,N-dimethylammonium-N-(2-hydroxypropyl) sulfonate (lauric acid amidopropyl-N,N-dimethylammonium-N-(2-hydroxypropyl) sulfonate, etc.); amine oxide type amphoteric surfactants such as alkyl dimethylamine oxide (lauryl dimethylamine oxide, etc.); phosphoric acid type amphoteric surfactants such as phosphatidylcholine, etc., and the like can be used alone or in combination.For the purposes of the present invention, glycine-type amphoteric surfactants and sulfobetaine-type amphoteric surfactants are preferably used, and N-coconut oil fatty acid acyl-N'-carboxymethyl-N'-hydroxyethylethylenediamine sodium (2-coconut oil alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine), N-lauroyl-N'-carboxymethyl-N'-hydroxyethylethylenediamine sodium, N-lauryl-N,N-dimethylammonium-N-(2-hydroxypropyl)sulfonate, lauric acid amidopropyl-N,N-dimethylammonium-N-(2-hydroxypropyl)sulfonate, coconut oil fatty acid amidopropyl-N,N-dimethylammonium-N-(2-hydroxypropyl)sulfonate, and the like are more preferably used.

[0025] In the present invention, the above-mentioned amphoteric surfactants can be produced by known production methods, but commercially available products available from various companies can also be used.

[0026] The content of component (C) in the detergent composition of the present invention can be appropriately set so that its use together with component (A) improves foaming properties and detergency, but is preferably 1 wt % or more, 2 wt % or more, 3 wt % or more, 4 wt % or more, or 4.2 wt % or more. The content of component (C) in the detergent composition of the present invention is preferably 15 wt % or less, 10 wt % or less, 8 wt % or less, 7.5 wt % or less, or 7.2 wt % or less. In one embodiment of the detergent composition of the present invention, the content of component (C) is preferably 1 wt % to 15 wt %, more preferably 1 wt % to 10 wt %, even more preferably 2 wt % to 10 wt %, even more preferably 2 wt % to 8 wt %, even more preferably 3 wt % to 8 wt %, even more preferably 4 wt % to 8 wt %, still more preferably 4 wt % to 7.5 wt %, and particularly preferably 4.2 wt % to 7.2 wt %.

[0027] The cleanser composition of the present invention may preferably contain an emollient (D) for the purpose of imparting a moisturizing feeling to the skin during and after cleansing. The emollient that may be contained as component (D) in the cleanser composition of the present invention is a lipophilic component that can occlude the skin surface to prevent evaporation of moisture. Any of these emollients commonly used in cosmetics can be used within a range that does not impair the stability of the cleanser composition of the present invention. Examples of such emollients include hydrocarbons such as squalane, liquid paraffin, and petrolatum; waxes such as beeswax and jojoba oil; esters such as isopropyl myristate and cetyl 2-ethylhexanoate; and vegetable oils such as soybean oil and olive oil. In the cleanser composition of the present invention, one of the above emollients may be selected and used alone, or two or more may be selected and used in combination. In the present invention, commercially available products provided by various companies can be used as the above emollients.

[0028] The content of component (D) in the cleanser composition of the present invention can be appropriately set depending on the type and properties of the emollient used, so as to provide a sufficient moisturizing feeling to the skin during and after cleansing, but is preferably 4 wt % or more, 5 wt % or more, 6 wt % or more, or 6.5 wt % or more. The content of component (D) in the cleanser composition of the present invention is preferably 20 wt % or less, 17 wt % or less, 15 wt % or less, 14 wt % or less, 13 wt % or less, 12 wt % or less, or 11 wt % or less. In one embodiment of the cleanser composition of the present invention, the content of component (D) is preferably 4 wt % to 20 wt %, more preferably 5 wt % to 17 wt %, even more preferably 5 wt % to 15 wt %, even more preferably 6 wt % to 14 wt %, even more preferably 6 wt % to 13 wt %, even more preferably 6 wt % to 12 wt %, and particularly preferably 6.5 wt % to 11 wt %.

[0029] The cleanser composition of the present invention may further contain a thickening polymer compound (E) for the purpose of imparting an appropriate viscosity to the composition. The thickening polymer compound that can be contained as component (E) in the cleanser composition of the present invention is a polymer compound that can be used as a thickener in cosmetics or cleanser compositions, other than tara gum contained as component (B), and can be used without any particular limitation, as long as it does not impair the characteristics of the present invention. Specific examples include naturally occurring thickening polysaccharides other than component (B) such as sodium alginate, carrageenan, agar, xanthan gum, guar gum, cellulose, pullulan, pectin, and locust bean gum; cellulose derivatives such as hydroxyethyl cellulose, hydroxypropyl cellulose, and hydroxypropylmethylcellulose; modified starches such as acetylated adipate cross-linked starch, acetylated phosphate cross-linked starch, acetylated oxidized starch, starch sodium octenylsuccinate, starch acetate, oxidized starch, hydroxyethyl starch, hydroxypropyl starch, hydroxypropyl starch phosphate, phosphated starch, phosphate cross-linked starch, and sodium starch glycolate; and vinyl polymers such as sodium polyacrylate, carboxyvinyl polymers, alkyl acrylate copolymers, polyvinyl alcohol, and polyvinylpyrrolidone. Modified starches and vinyl polymers are preferred, and hydroxypropyl starch phosphate and alkyl acrylate copolymers are more preferred. The alkyl acrylate copolymer is preferably a copolymer containing, as structural units, two or more monomers selected from the group consisting of alkyl acrylates (carbon numbers: 1 to 4) and alkyl acrylates (carbon numbers: 8), alkyl methacrylates (carbon numbers: 1 to 4) and alkyl methacrylates (carbon numbers: 8), acrylic acid, and methacrylic acid. In the detergent composition of the present invention, one of the above-mentioned thickening polymer compounds may be selected and used alone, or two or more may be selected and used in combination.

[0030] In the present invention, as the thickening polymer compound, commercially available products provided by various companies can be used.

[0031] The content of component (E) in the cleaning composition of the present invention can be appropriately set so as to impart the desired viscosity to the cleaning composition depending on the type, thickening properties, etc. of the thickening polymer compound used, but is preferably 0.05 wt % or more, 0.1 wt % or more, or 0.2 wt % or more. The content of component (E) in the cleaning composition of the present invention is preferably 5 wt % or less, 4 wt % or less, or 3.5 wt % or less. In one embodiment of the cleaning composition of the present invention, the content of component (E) is preferably 0.05 wt % to 5 wt %, more preferably 0.1 wt % to 5 wt %, even more preferably 0.1 wt % to 4 wt %, and even more preferably 0.2 wt % to 3.5 wt %.

[0032] The cleanser composition of the present invention typically contains water as component (F). Any water suitable for producing cosmetics or cleanser compositions can be used as the water, including purified water such as distilled water or ion-exchanged water. The content of component (F) in the cleanser composition of the present invention can be set such that the total amount of the cleanser composition is 100% by weight.

[0033] Furthermore, to the cleanser composition of the present invention, general additives such as lower alcohols (e.g., ethanol), polyhydric alcohols (e.g., propylene glycol, 1,3-butylene glycol, dipropylene glycol, glycerin, sorbitol), surfactants other than the above-mentioned component (A) and component (C) (anionic surfactants, cationic surfactants, and nonionic surfactants other than component (A)), oils, moisturizers (e.g., lactic acid and salts thereof; amino acids such as glycine, alanine, serine, and pyrrolidonecarboxylic acid and salts thereof; mucopolysaccharides such as sodium hyaluronate and chondroitin sulfate), anti-inflammatory agents, ultraviolet absorbers, preservatives (e.g., methyl parahydroxybenzoate and phenoxyethanol), antioxidants (e.g., dl-α-tocopherol and tocopherol acetate), chelating agents (e.g., disodium ethylenediaminetetraacetate and pentasodium diethylenetriaminepentaacetate), pH adjusters (e.g., citric acid, sodium citrate, and sodium phosphate), colorants, and fragrances may be added as needed, provided that the features of the present invention are not impaired.

[0034] The detergent composition of the present invention can be provided in a liquid form such as a solution or an emulsion; or a semi-solid form such as a paste or a cream, and can be produced according to a general production method for various forms of detergent compositions. For example, a solution detergent composition can be produced by dispersing component (B) in component (F), heating to dissolve, adding component (A) and mixing uniformly, and then dissolving other hydrophilic additives added as needed in component (F) separately, and mixing uniformly. Note that when ethanol or a polyhydric alcohol is contained as other additives, it is preferable to disperse component (B) in ethanol or a polyhydric alcohol, and then adding it to component (F) and dissolving it. Alternatively, an emulsion detergent composition can be produced by adding components (A) and (B), as well as hydrophilic surfactants other than component (A) added as needed, to component (F), heating to 70°C to 75°C to dissolve uniformly, adding a lipophilic additive separately heated to 70°C to 75°C to emulsify uniformly, and then adding other hydrophilic additives added as needed to a solution of component (F) separately, and mixing uniformly. The above-mentioned components can be mixed and dispersed using a commercially available mixer or disperser, and the above-mentioned emulsification can be carried out using a homomixer, a high-pressure homogenizer, a microfluidizer, or the like.

[0035] In a preferred embodiment of the present invention, the cleaning composition of the present invention is in a paste form. Here, "paste form" refers to a state in which the composition is highly viscous but has fluidity. "High viscosity" means, for example, that the viscosity at 25°C is 10,000 mPa·s or more, 15,000 mPa·s or more, 19,000 mPa·s or more, 20,000 mPa·s or more, or 22,000 mPa·s or more. The cleaning composition of the present invention in a paste form preferably contains the above-mentioned components (C) to (E) in addition to the above-mentioned components (A), (B), and (F).

[0036] The detergent composition of this embodiment preferably contains, as component (C), a glycine-type amphoteric surfactant and a sulfobetaine-type amphoteric surfactant, and more preferably contains an N-acylaminoethyl-N-2-hydroxyethylglycine salt such as N-lauroyl-N'-carboxymethyl-N'-hydroxyethylethylenediamine sodium or N-cocoacyl-N'-carboxymethyl-N'-hydroxyethylethylenediamine sodium (2-cocoalkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine), and an N-alkyl-N,N-dimethylammonium-N-(2-hydroxypropyl)sulfonate such as N-lauryl-N,N-dimethylammonium-N-(2-hydroxypropyl)sulfonate. The content of component (C) in the detergent composition of this embodiment is preferably 4 to 7.5% by weight, more preferably 4.2 to 7.2% by weight.

[0037] The emollient contained as component (D) in the cleanser composition of this embodiment is preferably an emollient that is low-polarity and solid at room temperature, more preferably a hydrocarbon that is solid at room temperature, and even more preferably petrolatum. Here, "room temperature" means room temperature as defined in the General Rules of the Japanese Pharmacopoeia, 18th Edition, i.e., 1°C to 30°C. The content of component (D) in the cleanser composition of this embodiment is preferably 6% to 14% by weight, more preferably 6.5% to 11% by weight.

[0038] The detergent composition of this embodiment preferably contains, as component (E), a modified starch and a vinyl polymer, and more preferably contains a hydroxypropyl starch phosphate and an alkyl acrylate copolymer. The content of component (E) in the detergent composition of this embodiment is preferably 1.5 to 4% by weight, more preferably 1.9 to 3.5% by weight.

[0039] The viscosity of the cleaning composition of this embodiment at 25° C. is preferably 15,000 mPa·s to 100,000 mPa·s, and more preferably 19,000 mPa·s to 70,000 mPa·s. The viscosity is measured at 25° C. by a method using a B-type viscometer (Brookfield viscometer).

[0040] The cleanser composition of this embodiment can be produced by a general method for producing an emulsion composition. For example, the cleanser composition can be produced by adding components (A), (B), (C), and (E), as well as an optional hydrophilic additive, to component (F), heating to 70°C to 75°C to dissolve uniformly, adding an optional lipophilic additive to component (D), mixing, heating to 70°C to 75°C to homogenize, and adding the resulting mixture to the emulsion, mixing, and emulsifying. The optional hydrophilic additive can also be added separately to component (F) and dissolved uniformly, and the emulsion can then be added and mixed uniformly. The above-described emulsification can be carried out using a homomixer, a high-pressure homogenizer, a microfluidizer, or the like.

[0041] The cleanser composition of the present invention is mild to the skin and has good foaming properties and a creamy, elastic, and dense foam quality. In one embodiment, the cleanser composition of the present invention also has an excellent moisturizing feeling, stability, and ease of use. When the cleanser composition of the present invention is in a paste form, it is easy to apply to the hands and to spread easily on the skin of the face, body, etc., and is particularly excellent in usability and handleability.

[0042] The present invention will be described in more detail below with reference to examples.

[0043] [Example 1, Comparative Examples 1 to 3] Detergent Compositions In the formulations shown in Table 1, component (B) or (B') was uniformly dispersed in glycerin, among other additives, and then added to component (F1) and uniformly dissolved. Next, component (A) and potassium coconutate were added and mixed uniformly. Additives other than potassium coconutate and glycerin were added and dissolved in component (F2), and the resulting solution was added to the aqueous solution and mixed uniformly to prepare the detergent compositions of Example 1 and Comparative Examples 1 to 3. The following raw materials were used for each component shown in Table 1. (i) As (A) potassium N-cocoate acylglycinate, "AMILITE GCK-12H" (Ajinomoto Co., Inc.) (21 wt % aqueous solution) was used. Potassium coconutate, which corresponds to an anionic surfactant other than component (A), was contained in the raw materials at a concentration of 9 wt %. The contents of potassium N-cocoate acylglycinate and potassium coconutate in the table indicate their net contents. (ii) As the (B) tara gum, "Solagum Tara" (Seppic) was used. (iii) As the (B') xanthan gum and cationized tara gum, "Keltrol CG-T" (Sansho Co., Ltd.) and "DoCGum CT-HDP" (DOC Japan Co., Ltd.) were used, respectively. (iv) As the glycerin, pentasodium diethylenetriaminepentaacetate, and phenoxyethanol, commercially available products for use in cosmetics were used. (v) As the water for (F1) and (F2), ion-exchanged water was used.

[0044] The detergent compositions of Example 1 and Comparative Examples 1 to 3 were all liquid. The pH of each detergent composition was measured as follows, and the foaming ability and foam quality were evaluated. The measurement and evaluation results are shown in Table 1. (1) pH The pH of each detergent composition was measured by the glass electrode method at 25°C. (2) Foaming ability and foam quality Each detergent composition was foamed for 5 seconds at 25°C using a blender (Iwatani Corporation), and two panelists evaluated the foaming ability and the density of the foam quality (creamyness and elasticity of the foam) according to the following evaluation criteria. The evaluation results were determined by discussion between the two panelists. <Evaluation criteria> (i) Foaming ability ◎: Foams well ○: Foams △: Does not foam very much ×: Does not foam (ii) Foam quality ◎: Very creamy and elastic ○: Creamy and elastic △: Not very creamy and elastic ×: Not creamy and elastic

[0045]

[0046] As shown in Table 1, all of the detergent compositions of Example 1 and Comparative Examples 1 to 3 exhibited weak acidity. The detergent composition of Example 1 was evaluated as having good foaming properties and creamy, elastic foam quality. On the other hand, the detergent composition of Comparative Example 1, which did not contain component (B), was evaluated as having good foaming properties but foam quality that was not creamy or elastic. Furthermore, the detergent composition of Comparative Example 2, which contained cationized tara gum as component (B') instead of component (B), and the detergent composition of Comparative Example 3, which contained xanthan gum as component (B') instead of component (B), were evaluated as having poor foaming properties and foam quality that was not very creamy or elastic.

[0047] [Examples 2 to 4] Cleaning composition In the formulation shown in Table 2, component (B) was uniformly dispersed in glycerin among other additives, and then component (F1) was added and uniformly dissolved. Component (A) was then added and uniformly mixed. The additives other than glycerin were added and dissolved in component (F2), and the resulting solution was added to the aqueous solution and uniformly mixed to prepare the cleaning compositions of Examples 2 to 4. The following raw materials were used for each component shown in Table 2. (i) As (A) N-coconut oil fatty acid acylglycerin potassium salt, "AMILITE GCK-12K" (Ajinomoto Co., Inc.) (30 wt % aqueous solution) was used. Furthermore, "AMILITE ACT-12L" (Ajinomoto Co., Inc.) (30 wt. % aqueous solution) was used as the N-coconut fatty acid acyl-L-alanine triethanolamine, and "AMILITE ACT-12" (Ajinomoto Co., Inc.) (30 wt. % aqueous solution) was used as the N-coconut fatty acid acyl-DL-alanine triethanolamine. The contents of N-coconut fatty acid acylglycinate potassium, N-coconut fatty acid acyl-L-alanine triethanolamine, and N-coconut fatty acid acyl-DL-alanine triethanolamine in the table indicate their net contents. (ii) As for (B) tara gum, "SOLAGUM TARA" (SEPPIC) was used, as in the case of the detergent composition of Example 1 above. (iii) As in the case of the cleanser composition of Example 1, commercially available cosmetic products were used as glycerin, pentasodium diethylenetriaminepentaacetate, and phenoxyethanol, and ion-exchanged water was used as water in (F1) and (F2).

[0048] The cleaning compositions of Examples 2 to 4 were all liquid. The pH of each of these cleaning compositions was measured and the foaming ability and foam quality were evaluated in the same manner as in the cleaning compositions of Example 1 and Comparative Examples 1 to 3. The measurement results and evaluation results are shown in Table 2.

[0049]

[0050] As shown in Table 2, all of the detergent compositions of Examples 2 to 4 were evaluated as being weakly acidic, having very good foaming properties, and producing very creamy, elastic foam.

[0051] Examples 5 to 11, Comparative Examples 4 to 14 Cleaning Compositions In the compositions shown in Tables 3 and 4, component (A) and potassium coconutate or component (A'), component (B) or (B'), component (C), and component (E) were added to component (F1) and heated to 70 to 75°C to dissolve uniformly, and component (D) heated to 70 to 75°C was added and mixed to form a uniform emulsification. The additive components other than potassium coconutate were added to component (F2) and dissolved uniformly, and the emulsion was added and mixed to form a uniform emulsion, thereby preparing cleaning compositions of Examples 5 to 11 and Comparative Examples 4 to 14. The following raw materials were used for each component shown in Tables 3 and 4. (i) As in Example 1, "AMILITE GCK-12H" (Ajinomoto Co., Inc.) (21 wt % aqueous solution) was used as (A) N-potassium coconutate acylglycerin in Examples 5 to 10 and Comparative Examples 4 to 12. The raw material contained potassium coconut oil fatty acid, which corresponds to an anionic surfactant other than component (A), at a concentration of 9 wt %. In Example 11, as in Example 2, "AMILITE GCK-12K" (Ajinomoto Co., Inc.) (30 wt % aqueous solution) was used. The contents of potassium N-coconut oil fatty acid acylglycine and potassium coconut oil fatty acid in the table indicate their net contents. (ii) (A') As potassium N-coconut oil fatty acid acyl-L-glutamate and sodium N-coconut oil fatty acid acyl-L-threonine, "AMISOFT CK-22" (Ajinomoto Co., Inc.) (28.8 wt % aqueous solution) and "MIYOVERT CTS-1" (Miyoshi Oil & Fats Co., Ltd.) (30 wt % aqueous solution) were used, respectively. The contents of potassium N-cocoyl-L-glutamate and sodium N-cocoyl-L-threonine in the table indicate the net contents. (iii) As in Examples 1 to 4, "Solagus Tara" (Seppic) was used as (B) tara gum.(iv) (B') As in Comparative Examples 2 and 3, "KELTROL CG-T" (Sansho Co., Ltd.) and "DOCGUM CT-HDP" (DOC Japan Co., Ltd.) were used as xanthan gum and cationized tara gum, respectively. As agar (high viscoelasticity, low viscosity), agar (low strength), tamarind gum, and locust bean gum, "Ina Agar CS-200TR (Soft S)" (Ina Food Industry Co., Ltd.), "Ina Agar CS-320TR (Ultra Agar)" (Ina Food Industry Co., Ltd.), "Tamarind Gum" (Sumitomo Pharma Co., Ltd.), and "Locust Bean Gum" (Sansho Co., Ltd.) were used, respectively. (v) (C) N-lauroyl-N'-carboxymethyl-N'-hydroxyethylethylenediamine sodium and N-lauryl-N,N-dimethylammonium-N-(2-hydroxypropyl)sulfonate were "Softazoline LHL" (Kawaken Fine Chemicals Co., Ltd.) (27 wt % aqueous solution) and "Amphitol 20HD" (Kao Corporation) (30 wt % aqueous solution), respectively. The contents of N-lauroyl-N'-carboxymethyl-N'-hydroxyethylethylenediamine sodium and N-lauryl-N,N-dimethylammonium-N-(2-hydroxypropyl)sulfonate in the table indicate their net contents. (vi) (D) Vaseline was "Sunwhite P-200" (Nikko Rica Corporation). (vii) As the (E) hydroxypropyl starch phosphate and alkyl acrylate copolymer, "STRUCTURE XL" (Aguzo Nobel Coating Co., Ltd.) and "Carbopol Aqua SF-1" (Lubrizol) (30 wt % aqueous solution) were used, respectively. The content of alkyl acrylate copolymer in the table indicates the net content. (viii) As the citric acid, glycerin, pentasodium diethylenetriaminepentaacetate, and phenoxyethanol, commercially available products for use in cosmetics were used. (ix) As the (F1) and (F2) water, ion-exchanged water was used.

[0052] For each of the detergent compositions of Examples 5 to 11 and Comparative Examples 4 to 14, the pH was measured and the viscosity was measured at 25°C using a Brookfield viscometer ("TVB type viscometer", Toki Sangyo Co., Ltd.) (rotor No. 4) in the same manner as for the detergent compositions of Example 1 and Comparative Examples 1 to 3. Foaming ability and foam quality were also evaluated in the same manner as for the detergent compositions of Example 1 and Comparative Examples 1 to 3. Furthermore, a sensory evaluation was conducted by two panelists on the moisturizing feel during washing and after washing, as described below. (Evaluation of moisturizing feel) Two panelists washed their hands with 1.5 g of each detergent composition and evaluated the moisturizing feel during washing and after washing according to the following evaluation criteria. The evaluation results were determined by discussion between the two panelists. <Evaluation criteria> ◎: Very good ○: Good △: Somewhat bad ×: Not good The measurement and evaluation results are shown in Tables 3 and 4.

[0053]

[0054]

[0055] As shown in Table 3, all of the detergent compositions of Examples 5 to 11 were weakly acidic, had viscosities of 15,000 mPa·s or more and 19,500 mPa·s to 69,000 mPa·s, and exhibited a good paste-like consistency. Furthermore, the detergent compositions of Examples 5 to 11 exhibited good or very good foaming properties, produced creamy, elastic, and good or very good foam quality, and were rated as providing a very good or good moisturizing feel during cleansing and after cleansing. On the other hand, as shown in Table 4, the detergent composition of Comparative Example 13, which contained N-cocoyl-L-glutamate potassium, an N-acyl acidic amino acid salt, as component (A′) instead of component (A), and the detergent composition of Comparative Example 14, which contained N-cocoyl-L-threonine potassium, an N-acyl polar side chain amino acid, were weakly acidic, but did not provide a paste-like composition with sufficient viscosity. The detergent composition of Comparative Example 4, which did not contain tara gum as component (B), and the detergent compositions of Comparative Examples 5 to 10 and 12, which used agar, xanthan gum, tamarind gum and locust bean gum as component (B') instead of tara gum as component (B), respectively, were evaluated as having slightly poor foaming ability and not very dense foam quality (creamyness and elasticity). The detergent composition of Comparative Example 11, which used cationized tara gum, was evaluated as having poor foaming ability and foam quality.

[0056] The above evaluation results suggest that in order to obtain a cleanser composition that is mild to the skin, has good foaming properties, and produces creamy, elastic, dense foam with an excellent moisturizing feel, it is necessary to use, as component (A), a combination of an N-acyl nonpolar side chain amino acid or a salt thereof, such as an N-acyl glycine salt or an N-acylalanine salt, and (B) tara gum. Furthermore, it was suggested that in order to obtain a detergent composition that is paste-like and has a viscosity of about 15,000 mPa s to 100,000 mPa s and is excellent in usability, it is preferable to use a detergent composition that contains, in addition to the above-mentioned components (A) and (B), as component (C), a glycine-type amphoteric surfactant such as N-lauroyl-N'-carboxymethyl-N'-hydroxyethylethylenediamine sodium, and a sulfobetaine-type amphoteric surfactant such as N-lauryl-N,N-dimethylammonium-N-(2-hydroxypropyl)sulfonate, as component (D), petrolatum as component (D), and hydroxypropyl starch phosphate and an alkyl acrylate copolymer as component (E).

[0057] As described above in detail, the present invention can provide a skin cleanser composition that is mild to the skin, has good foaming properties, and produces creamy, elastic, and dense foam. The present invention can also provide a skin cleanser composition that has an excellent moisturizing feel and is easy to use.

[0058] This application is based on patent application No. 2024-072309 filed in Japan, the contents of which are incorporated in their entirety herein.

Claims

1. A detergent composition comprising: (A) one or more amino acids selected from the group consisting of N-acyl nonpolar side chain amino acids having a linear or branched, saturated or unsaturated acyl group having 8 to 22 carbon atoms and salts thereof; and (B) tara gum.

2. The detergent composition according to claim 1, wherein (A) one or more amino acids selected from the group consisting of N-acyl nonpolar side chain amino acids having a straight or branched chain, saturated or unsaturated acyl group of 8 to 22 carbon atoms, and salts thereof, are selected from the group consisting of N-acylglycines having a straight or branched chain, saturated or unsaturated acyl group of 8 to 22 carbon atoms, N-acylalanines having a straight or branched chain, saturated or unsaturated acyl group of 8 to 22 carbon atoms, N-acyl-N-methyl-β-alanines having a straight or branched chain, saturated or unsaturated acyl group of 8 to 22 carbon atoms, and salts thereof.

3. The detergent composition according to claim 1 or 2, wherein the weight ratio of (A) one or more amino acids selected from the group consisting of N-acyl nonpolar side chain amino acids having a linear or branched chain, saturated or unsaturated acyl group, and having 8 to 22 carbon atoms, and salts thereof, to (B) tara gum [(A):(B)] is 25:0.05 to 5:

1.

4. The cleaning composition according to claim 1 or 2, further comprising (C) an amphoteric surfactant.

5. A cleaning composition according to claim 4, containing as (C) an amphoteric surfactant one or more selected from the group consisting of glycine-type amphoteric surfactants and sulfobetaine-type amphoteric surfactants.

6. The cleaning composition according to claim 1 or 2, further comprising (D) an emollient.

7. The cleaning composition according to claim 6, which contains (D) petrolatum as an emollient.

8. The cleaning composition according to claim 1 or 2, further comprising (E) a thickening polymeric compound.

9. A cleaning composition according to claim 8, containing (E) one or more thickening polymer compounds selected from the group consisting of hydroxypropyl starch phosphate and alkyl acrylate copolymers.

10. The cleaning composition according to claim 1 or 2, which further contains (C) an amphoteric surfactant, (D) an emollient, and (E) a thickening polymeric compound, and is in the form of a paste.

11. A cleaning composition according to claim 10, containing a glycine-type amphoteric surfactant and a sulfobetaine-type amphoteric surfactant as (C) the amphoteric surfactant.

12. The cleaning composition according to claim 10, which contains (D) petrolatum as an emollient agent.

13. A cleaning composition according to claim 10, containing (E) a hydroxypropyl starch phosphate and alkyl acrylate copolymer as a thickening polymeric compound.

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