CN111526866A

CN111526866A - Skin cleanser composition

Info

Publication number: CN111526866A
Application number: CN201880081060.7A
Authority: CN
Inventors: 深见健一
Original assignee: Kao Corp
Current assignee: Kao Corp
Priority date: 2017-12-26
Filing date: 2018-12-26
Publication date: 2020-08-11
Also published as: WO2019131799A1; KR20230124096A; KR20200086710A; TWI801479B; JP2019116473A; JP7397571B2; TW201929837A

Abstract

A skin cleanser composition contains the following components (A), (B), (C), (D) and (E), wherein the content of the component (D) in the composition is 35-62% by mass. (A) At least 1 kind of cross-linked substance selected from cross-linked substance obtained by cross-linking hydroxyalkyl modified starch with 2-5 carbon atoms, cross-linked substance obtained by cross-linking hydroxyalkyl modified starch with 2-5 carbon atoms and acyl modified starch with 2-18 carbon atoms, and cross-linked substance obtained by cross-linking acyl modified starch with 2-18 carbon atoms; (B) an N-acylamino acid salt; (C) polyoxyethylene alkyl sulfosuccinates and/or alkyl sulfosuccinates; (D) a polyol; (E) a nonionic surfactant having HLB of 9 to 14.5.

Description

Skin cleanser composition

Technical Field

The present invention relates to a skin cleanser composition.

Background

As a skin cleansing agent that is mild to the skin and has an excellent feeling of use, for example, a cream-like cleansing agent containing an N-acylamino acid salt, a sulfosuccinic acid type surfactant, a nonionic surfactant having an HLB of 10 or more, and a polyhydric alcohol is known (patent document 1).

On the other hand, N-acylamino acid salts are surfactants with less irritability, but because of poor foaming properties such as poor foam quality and coarse foam quality, the combined use of hydroxypropyl starch phosphoric acid has been proposed for the purpose of improving the problem (patent documents 2 and 3).

(patent document 1) Japanese patent laid-open publication No. 2004-155716

(patent document 2) Japanese patent application laid-open No. 2006-77184

(patent document 3) Japanese patent application laid-open No. 2005-232049

Disclosure of Invention

The present invention relates to a skin cleanser composition which contains the following components (A), (B), (C), (D) and (E), and the content of the component (D) in the composition is 35-62% by mass.

(A) At least 1 kind of cross-linked substance selected from cross-linked substance obtained by cross-linking hydroxyalkyl modified starch with 2-5 carbon atoms, cross-linked substance obtained by cross-linking hydroxyalkyl modified starch with 2-5 carbon atoms and acyl modified starch with 2-18 carbon atoms, and cross-linked substance obtained by cross-linking acyl modified starch with 2-18 carbon atoms;

(B) an N-acylamino acid salt;

(C) polyoxyethylene alkyl sulfosuccinates and/or alkyl sulfosuccinates;

(D) a polyol;

(E) a nonionic surfactant having HLB of 9 to 14.5.

Detailed Description

The cream-like cleansing agent described in patent document 1 has a high foaming power and a large amount of foam, but there is still room for improvement in high-temperature stability. Further, when the polyol is blended in an amount of 35% by mass or more, the foam amount, the fineness of the foam texture, and the wet after-washing feel tend to be reduced. On the other hand, although some improvements in quick-foaming properties and foam smoothness have been observed in the detergent compositions described in patent documents 2 and 3, these compositions are not sufficient in terms of characteristics required by consumers in recent years, and there is still room for further improvement.

The present inventors have conducted various studies to develop a skin cleanser composition capable of solving the above problems, and as a result, have found that a skin cleanser composition having excellent high-temperature stability and excellent foam properties such as foaming and foam fineness can be obtained by using a specific starch cross-linked product, N-acylamino acid salt, polyoxyethylene alkyl sulfosuccinate and/or alkyl sulfosuccinate, and nonionic surfactant having HLB of 9 to 14.5 in combination even when a polyol is contained at a high concentration (35 to 62 mass%), and have completed the present invention.

The skin cleanser composition of the present invention has excellent high-temperature stability, excellent foam quality characteristics such as quick-foaming property, large amount of foam, and fine foam texture, and can provide a touch feeling after washing.

The component (A) used in the present invention is a crosslinked product of at least 1 kind selected from the group consisting of crosslinked products obtained by crosslinking hydroxyalkyl modified starches having 2 to 5 carbon atoms, crosslinked products obtained by crosslinking hydroxyalkyl modified starches having 2 to 5 carbon atoms with acyl modified starches having 2 to 18 carbon atoms and crosslinked products obtained by crosslinking acyl modified starches having 2 to 18 carbon atoms, and is a crosslinked product obtained by crosslinking 2 kinds of modified starches, i.e., hydroxyalkyl modified starches having 2 to 5 carbon atoms and acyl modified starches having 2 to 18 carbon atoms, either homogeneously or at different sites (see Japanese patent application laid-open No. 2000-514435).

The term "hydroxyalkyl modified starch having 2 to 5 carbon atoms" refers to a starch in which a hydroxyl group is bonded to a starch skeleton via an alkyl group having 2 to 5 carbon atoms, and which has an appropriate balance between hydrophilicity and lipophilicity. The position of the hydroxyl group in the alkyl group is not critical and can be set at any position. The degree of substitution by hydroxyalkylation is preferably 0.08 to 0.3. By "degree of substitution" is meant the average number of hydroxyl groups per 1 unit of starch molecule of anhydroglucose. Hydroxyalkylation of native starch is achieved by reacting the carbon atoms of native starch with only the appropriate amount of an alkylene oxide. Preferred are hydroxyethylated and/or hydroxypropylated starches obtained by reacting starch with ethylene oxide or propylene oxide. In addition, a plurality of hydroxyl groups may be provided for each alkyl group.

The "acyl group-modified starch having 2 to 18 carbon atoms" is a starch acylated with an acyl group having 2 to 18 carbon atoms, and can obtain an appropriate balance between hydrophilicity and lipophilicity of the starch. Acylation is generally carried out by reaction with an acid anhydride of the formula (R-CO) 2O. Here, R represents an alkyl group such as a methyl group or an ethyl group.

The crosslinking of these modified starches can be carried out using suitable crosslinking agents, for example difunctional compounds. A preferable crosslinking method is, for example, phosphorylation. At this point, the starch is reacted with phosphorus oxychloride, phosphorus pentoxide, and/or sodium trimetaphosphate. The two starches are crosslinked by anionic P-O groups.

A preferable crosslinking method is, for example, a method using an alkanedicarboxylic acid or an alkanedicarboxylic acid having 4 to 18 carbon atoms. Alkane dicarboxylic acids having 4 to 8 carbon atoms are preferably used, and adipic acid is particularly preferred. Two starches are bonded to a C4-18 alkane dicarboxylic acid or alkene dicarboxylic acid via an ester bond. The starch may be linear or branched. The crosslinked material crosslinked by such a dicarboxylic acid can be obtained, for example, by reacting starch with a mixed anhydride of a dicarboxylic acid and acetic acid. In the case of dry starch, generally less than 0.1 mass%, usually 0.06 mass%, of crosslinking agent is used.

As the starch cross-linked substance, hydroxypropyl distarch phosphate and acetylated distarch adipate are preferable.

The raw starch used to obtain the above-mentioned specific starch may be any vegetable starch. Examples of such starch include corn starch, potato starch, wheat starch, rice starch, tapioca starch, sweet potato starch, and sago starch. The starch of these raw materials preferably contains amylopectin in an amount of at least 70 mass%, more preferably at least 85 mass%, particularly preferably at least 90 mass%.

The starch cross-linked product of component (a) is preferably gelatinized, more preferably completely gelatinized. The gelatinization may be carried out by previously gelatinizing the raw starch or by gelatinizing the cross-linked product, and preferably, the starch cross-linked product used as a result is gelatinized.

Examples of a method generally used for such starch production include drum drying and extrusion spray drying.

The drum drying process includes simultaneously conditioning and drying the high viscosity semi-solid starch paste on a heated drum. The dried film was peeled off from the drum using a metal blade, followed by pulverization. This step can be carried out until the individual content becomes extremely large.

Extrusion drying can be used to simultaneously condition and dry the starch (see U.S. patent specification No. 3, 137,592). This method utilizes physical treatment of a starch/water mixture at high temperature and high pressure, whereby the starch is gelatinized and the starch discharged from a nozzle expands as the water is abruptly evaporated.

The crosslinked material of the component (A) can be produced, for example, by the method described in Japanese patent application laid-open No. 2005-232049.

The crosslinked material of the component (A) is preferably a crosslinked material in which a hydroxyalkyl-modified starch having 2 to 5 carbon atoms and an acyl-modified starch having 2 to 18 carbon atoms are crosslinked by an anionic P-O group, more preferably a hydroxypropyl starch phosphate, and commercially available materials such as STRUCTURE XL (manufactured by Akzo Nobel) and STRUCTURE ZEA (manufactured by Akzo Nobel) can be used.

The content of the crosslinked material of the component (a) is preferably 0.1% by mass or more, more preferably 0.2% by mass or more, further preferably 0.3% by mass or more, further preferably 0.5% by mass or more, and further preferably 0.7% by mass or more, and is preferably 4% by mass or less, more preferably 2.5% by mass or less, further preferably 2.0% by mass or less, further preferably 1.7% by mass or less, and further preferably 1.3% by mass or less, from the viewpoint of improving high-temperature stability, quick-foaming property, foam quantity, foam fineness, and wet feeling after washing. The content of the component (a) in the skin cleansing composition is preferably 0.1 to 4% by mass, more preferably 0.2 to 2.5% by mass, even more preferably 0.3 to 2.0% by mass, even more preferably 0.5 to 1.7% by mass, even more preferably 0.7 to 1.3% by mass.

Examples of the amino acid residue in the N-acylamino acid salt of the component (B) include acidic amino acids such as glutamic acid and aspartic acid; neutral amino acids such as glycine, alanine, threonine, methylalanine, and sarcosine (methylglycine); and basic amino acids such as lysine and arginine. One of these may be used 1 kind, or 2 or more kinds selected from the above may be used in combination. Among these amino acids, L, D and DL are present, and L is preferred in terms of improving the stability of the preparation over time.

Among these, from the viewpoint of stability with time, quick foamability, foam quantity, foam texture, and wet feeling after washing, an acidic amino acid or a neutral amino acid is more preferable as the amino acid residue. Specifically, 1 or 2 or more selected from glutamic acid, aspartic acid, glycine and alanine are preferably contained, more preferably 1 or 2 selected from glutamic acid and glycine are contained, and particularly preferably glycine is contained.

In particular, the component (B) preferably contains at least 50 mass%, more preferably 70 mass% or more, and still more preferably 75 mass% or more of the N-acyl glycinate from the viewpoint of good high-temperature stability, quick foamability, foam quantity, foam fineness, and wet feeling after washing.

As the acyl group, a saturated or unsaturated, linear or branched acyl group having 10 to 20 carbon atoms can be preferably used. From the viewpoint of improving quick foamability, foam quantity, foam quality, and wet feel after washing, the carbon number of the acyl group is preferably 10 or more and 18 or less, more preferably 10 or more and 16 or less, and still more preferably 10 or more and 14 or less. Specific examples thereof include acyl groups formed from fatty acids (including branched fatty acids) such as decanoyl, lauroyl, myristoyl, palmitoyl, stearoyl, oleoyl, and linoleoyl groups. These may be derived from animals and plants, and examples thereof include naturally-derived mixed fatty acids such as coconut oil fatty acid, castor oil fatty acid, olive oil fatty acid, palm oil fatty acid, and the like. Among these, the acyl group is preferably a saturated linear or branched acyl group, more preferably a saturated linear acyl group, from the viewpoint of improving the stability of the preparation over time.

Examples of the salts include inorganic salts such as sodium salt, potassium salt, calcium salt, magnesium salt, aluminum salt, and zinc salt; organic amine salts such as ammonium salt, monoethanolamine salt, diethanolamine salt and triethanolamine salt; organic salts such as basic amino acid salts including arginine salts and lysine salts, and 1 or a mixture of 2 or more of these salts can be used. From the viewpoint of low skin irritation and suppression of post-wash tightness, it preferably contains 1 or 2 or more selected from sodium salts, potassium salts and triethanolamine salts, and more preferably contains 1 or 2 selected from sodium salts and potassium salts.

Preferable specific examples of the N-acylamino acid salt include sodium salts, potassium salts, and triethanolamine salts of N-lauroyl glycine, N-lauroyl glutamic acid, N-myristoyl glycine, N-myristoyl glutamic acid, N-coco fatty glycine, and N-coco fatty glutamic acid.

Examples of commercially available products of component (B) include AMILITE GCK-11 (manufactured by Ajinomoto Co., Ltd.), AMILITE GCS-11 (manufactured by Ajinomoto Co., Ltd.), AMISOFT CT-12 (manufactured by Liuinomoto Co., Ltd.), AMISOFT LS-11 (manufactured by Liuinomoto Co., Ltd.), and AMISOFT MS-11 (manufactured by Ajinomoto Co., Ltd.).

The N-acylamino acid salt of the component (B) can be used in 1 or 2 or more, and the content thereof in the skin cleansing composition is preferably 10% by mass or more, more preferably 12% by mass or more, further preferably 15% by mass or more, further preferably 18% by mass or more, and further preferably 30% by mass or less, more preferably 28% by mass or less, further preferably 25% by mass or less, further preferably 22% by mass or less, from the viewpoint of improving the wet feeling after washing. The content of the component (B) in the skin cleansing composition is preferably 10 to 30% by mass, more preferably 12 to 28% by mass, even more preferably 15 to 25% by mass, and even more preferably 18 to 22% by mass.

The polyoxyethylene alkyl sulfosuccinate and/or alkyl sulfosuccinate as the component (C) is not particularly limited and may be appropriately selected depending on the purpose, and from the viewpoint of enhancing the wet feeling after washing, the alkyl chain thereof is preferably a monovalent hydrocarbon group having 12 to 22 carbon atoms, and more preferably a monovalent hydrocarbon group having 12 to 14 carbon atoms.

The salt is preferably an alkali metal salt, an alkaline earth metal salt, an amine salt, or an amino acid salt, and more preferably contains an alkali metal salt such as sodium or potassium, a substituted or unsubstituted ammonium salt, and further preferably contains 1 or 2 kinds selected from a substituted or unsubstituted ammonium salt and a sodium salt, from the viewpoint of satisfactory foam quantity and foam quality.

The polyoxyethylene alkyl sulfosuccinate preferably has an ethylene addition mole number of 1 to 10, more preferably 2 to 5, from the viewpoint of satisfactory foam amount and foam quality.

Specific examples of the component (C) include polyoxyethylene (1) alkyl (12 to 14) sulfosuccinates, polyoxyethylene (2) alkyl (12 to 14) sulfosuccinates, polyoxyethylene (3) alkyl (12 to 14) sulfosuccinates, polyoxyethylene (5) dialkyl (12 to 14) sulfosuccinates, polyoxyethylene (7) dialkyl (12 to 14) sulfosuccinates, polyoxyethylene (9) dialkyl (12 to 14) sulfosuccinates, polyoxyethylene (2) alkyl (12 to 15) sulfosuccinates, polyoxyethylene (2) monooleamide sulfosuccinates, polyoxyethylene (4) coconut oil fatty acid isopropanolamide sulfosuccinates, polyoxyethylene (5) lauroyl ethanolamides, undecylenoylamide ethylsulfosuccinates, diethylhexyl sulfosuccinates, and mixtures thereof, Lauryl sulfosuccinate, lauryl laureth sulfosuccinate, and the like. Among these, from the viewpoint of good quick-foaming properties and foam quality, 1 or 2 or more selected from among polyoxyethylene monoalkyl sulfosuccinates and monoalkyl sulfosuccinates are preferably contained, more preferably 1 or 2 selected from among disodium polyoxyethylene (3) laureth sulfosuccinate and disodium laureth sulfosuccinate are contained, and still more preferably disodium laureth sulfosuccinate is contained.

The content of the component (C) in the skin cleansing composition is preferably 0.5% by mass or more, more preferably 1.0% by mass or more, further preferably 1.5% by mass or more, further preferably 1.8% by mass or more, further preferably 2.0% by mass or more, further preferably 2.5% by mass or more, and further preferably 8% by mass or less, more preferably 7% by mass or less, further preferably 6% by mass or less, further preferably 5.5% by mass or less, further preferably 5.0% by mass or less, and further preferably 4.5% by mass or less, from the viewpoint of improving quick foamability, lather volume, lather texture, and wet feeling after washing. The content of the component (C) in the skin cleansing composition is preferably 0.5 to 8% by mass, more preferably 1.0 to 7% by mass, even more preferably 1.5 to 6% by mass, even more preferably 1.8 to 5.5% by mass, even more preferably 2.0 to 5.0% by mass, and even more preferably 2.5 to 4.5% by mass.

In the present invention, the mass ratio (a)/(C) of the component (a) to the component (C) is preferably 0.1 or more, more preferably 0.15 or more, even more preferably 0.25 or more, and further preferably 0.8 or less, more preferably 0.6 or less, even more preferably 0.4 or less, from the viewpoint of improving high-temperature stability, quick-foaming properties, foam quantity, foam texture, and wet feeling after washing. The mass ratio (A)/(C) of the component (A) to the component (C) is preferably 0.1 to 0.8, more preferably 0.15 to 0.6, and still more preferably 0.25 to 0.4.

In the present invention, the mass ratio (B)/(C) of the component (B) to the component (C) is preferably 3.5 or more, more preferably 4 or more, further preferably 4.5 or more, and further preferably 15 or less, more preferably 13 or less, further preferably 11 or less, from the viewpoint of improving quick foamability, foam amount, and wet feeling after washing. The mass ratio (B)/(C) of the component (B) to the component (C) is preferably 3.5 to 15, more preferably 4 to 13, and still more preferably 4.5 to 11.

The polyol as the component (D) may contain 1 or 2 or more selected from the group consisting of (D1) diols and (D2) trihydric or higher alcohols.

Specific examples of the diol (D1) include alkanediols such as ethylene glycol, propylene glycol, 1, 3-butanediol, 1, 2-pentanediol, 1, 3-pentanediol, 1, 4-pentanediol, 1, 5-pentanediol, and hexanediol; diethylene glycol, dipropylene glycol, and the like. Among these, from the viewpoint of improving the fineness of the foam, the amount of the foam, and the foam sustainability, 1 or 2 or more selected from ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, and 1, 3-butanediol are preferably contained, and at least 1, 3-butanediol is more preferably contained.

(D2) Among trihydric or higher alcohols, examples of trihydric alcohols include glycerin and trimethylolpropane. Examples of the quaternary or higher alcohol include polyglycerin such as diglycerin and triglycerin; saccharides or sugar alcohols such as glucose, maltose, hydrogenated maltose (マルチトース), sucrose, xylitol, sorbitol, maltitol (マルビト - ル), polyoxyethylene methyl glucoside, polyoxyethylene ethyl glucoside, and polyoxyethylene propylene glucoside. Among these, from the viewpoint of improving the high-temperature stability and the wet feeling after washing, 1 or 2 or more selected from glycerol (or higher than a triol), diglycerol, sorbitol, maltitol, and polyoxyethylene methyl glucoside (or higher than a tetratomic alcohol) are preferably contained, more preferably 1 or 2 or more selected from glycerol, diglycerol, sorbitol, and maltitol are contained, still more preferably 1 or 2 selected from glycerol and diglycerol are contained, and still more preferably at least glycerol is contained.

In the present invention, it is preferable that the component (D) contains a diol (D1) and a trihydric or higher alcohol (D2). When the component (D) contains the component (D1) and the component (D2), the content ratio of the component (D2) to the total amount of the component (D) [ (D1) + (D2) ] [ (D2)/((D1) + (D2)) ] is preferably 0.6 or more, more preferably 0.7 or more, further preferably 0.8 or more, and further preferably 0.98 or less, more preferably 0.95 or less, from the viewpoint of improving the moist feeling after washing. The content ratio [ (D2)/((D1) + (D2)) ] of the component (D2) to the total amount of the component (D) [ (D1) + (D2) ] is preferably 0.6 to 0.98, more preferably 0.7 to 0.98, and still more preferably 0.8 to 0.95.

The component (D) preferably contains the component (D2) in an amount of 60 mass% or more, more preferably 70 to 95 mass%, and still more preferably 80 to 95 mass%.

The component (D) preferably contains 60 mass% or more of glycerin, and more preferably 75 mass% or more. When the amount of glycerin in the component (D) is within this range, the high-temperature stability of the crystallization state of the N-acylamino acid salt of the component (B) is further improved.

The content of the component (D) is preferably 35% by mass or more, more preferably 40% by mass or more, further preferably 42% by mass or more, further preferably 45% by mass, and further preferably 62% by mass or less, more preferably 60% by mass or less, further preferably 58% by mass or less, further preferably 55% by mass or less in the skin cleanser composition, from the viewpoint of improving the stability over the day. The content of the component (D) in the skin cleansing composition is 35 to 62 mass%, preferably 40 to 60 mass%, more preferably 42 to 58 mass%, and still more preferably 45 to 55 mass%.

The nonionic surfactant of the component (E) has HLB of 9-14.5.

The nonionic surfactant of the component (E) may be used in 1 kind or in combination of 2 or more kinds, and when 2 or more kinds of nonionic surfactants are used, the mixing HLB of the mixed surfactant composed of them is 9 to 14.5.

From the viewpoint of improving the stability over time, quick-foaming properties, and foam quantity, the HLB of the mixed surfactant composed of 1 kind of nonionic surfactant or 2 or more kinds of nonionic surfactants is preferably 9.5 or more, more preferably 10.5 or more, and even more preferably 11 or more, and further preferably 14 or less, more preferably 13.5 or less, and even more preferably 13 or less. The nonionic surfactant of the component (E) is 1 kind of nonionic surfactant or a mixed surfactant composed of 2 or more kinds of nonionic surfactants, and has HLB of 9 to 14.5, preferably 9.5 to 14, more preferably 10.5 to 13.5, and further preferably 11 to 13.

Here, HLB (Hydrophilic-Lipophilic Balance) represents the molecular weight of a Hydrophilic group portion in the total molecular weight of a surfactant, and is obtained by Griffin's (Griffin) formula for a nonionic surfactant.

The HLB of a mixed surfactant composed of 2 or more nonionic surfactants is represented by the following formula, and the HLB value of each nonionic surfactant is arithmetically averaged according to the blending ratio thereof.

Hybrid HLB ═ Sigma (HLBx × Wx)/SigmaWx

HLBx represents the HLB value of the nonionic surfactant X.

Wx represents the mass (g) of the nonionic surfactant X having the HLBx value.

The nonionic surfactant of the component (E) is not limited as long as the above conditions are satisfied, and examples thereof include nonionic surfactants each composed of a fatty acid ester having 8 to 22 carbon atoms and an ether of a higher alcohol having 8 to 22 carbon atoms and having a hydroxyl group or an ethylene oxide group as a hydrophilic functional group.

Specific examples thereof include glycerin fatty acid esters, polyglycerin fatty acid esters, polyethylene glycol fatty acid esters, polyoxyethylene glycerin fatty acid esters, propylene glycol fatty acid esters, polyoxyethylene polyoxypropylene, sorbitan fatty acid esters, polyoxyethylene sorbitol fatty acid esters, polyoxyethylene castor oil, polyoxyethylene hydrogenated castor oil fatty acid esters, polyalkyl glycerol ethers, polyoxyethylene alkyl ether fatty acid esters, sucrose fatty acid esters, alkyl polyglucosides, and (poly) alkyl glycerol ethers.

Among these, from the viewpoint of improving the stability over the day, and improving the foam amount and the foam texture, it is preferable to contain 1 or 2 or more selected from the group consisting of glycerin fatty acid esters, polyglycerin fatty acid esters, polyethylene glycol fatty acid esters, polyoxyethylene glycerin fatty acid esters, polyoxyethylene sorbitol fatty acid esters, (poly) alkyl glycerin ethers, polyoxyethylene alkyl ethers, sucrose fatty acid esters, and alkyl polyglucosides; from the viewpoint of stability over time, it is more preferable to contain 1 or 2 or more selected from the group consisting of glycerin fatty acid esters and polyglycerin fatty acid esters.

More specifically, it preferably contains 1 or 2 or more members selected from the group consisting of polyglyceryl myristate-10 (HLB: 15), glyceryl stearate (HLB: 9), glyceryl monocaprylate (HLB: 7.2), glyceryl monocaprate (HLB: 6.5), polyglyceryl laurate-10 (HLB: 15.5) and polyglyceryl-4-lauryl ether (HLB: 12.3).

From the viewpoint of improving the stability over time, the foam amount and the foam texture, it is preferable that these components (E) are used in combination with 2 or more nonionic surfactants having a high HLB and nonionic surfactants having a low HLB. In the present invention, it is preferable to use 1 or more nonionic surfactants having an HLB of 10 or more and 1 or more nonionic surfactants having an HLB of less than 10 in combination, and it is more preferable to use 1 or more nonionic surfactants having an HLB of 12 or more and 1 or more nonionic surfactants having an HLB of 6 or more and 9.5 or less in combination.

The component (E) can be used in 1 or 2 or more types, and the content in the skin cleansing composition is preferably 1% by mass or more, more preferably 2% by mass or more, and even more preferably 4% by mass or more, and further preferably 12% by mass or less, more preferably 10% by mass or less, and even more preferably 8% by mass or less, from the viewpoint of improving high-temperature stability and wet feeling after washing. The content of the component (E) in the skin cleansing composition is preferably 1 to 12% by mass, more preferably 2 to 10% by mass, and still more preferably 4 to 8% by mass.

The skin cleansing composition of the present invention may further contain (F) a cationic polymer from the viewpoint of improving quick lathering properties and wet feel after washing.

Examples of the cationic polymer include polymers containing an amino group, an imidazole group, a pyridine group, and salts or quaternary salts thereof. From the viewpoint of quick foamability and foam quality, the cationic charge density is preferably 2meq/g or more, more preferably 3 to 7 meq/g.

Here, the cationic charge density means the number of cationic charge equivalents (meq/g) in the monomer units constituting the polymer.

Examples of such cationic polymers include homopolymers of dimethyldiallylammonium chloride; copolymers of dimethyldiallylammonium chloride with other monomers such as (meth) acrylic acid, (meth) acrylic acid esters, (meth) acrylamides, and the like; polymethacryloxyethyltrimethylammonium chloride and the like.

More specifically, the temperature of the molten metal is controlled, for example, examples thereof include a homopolymer of dimethyldiallylammonium chloride (MERQUAT 100, manufactured by NALCO, having a charge density of 6.2meq/g), a copolymer of dimethyldiallylammonium chloride and acrylic acid (MERQUAT 295, manufactured by NALCO, having a charge density of 5.9meq/g), a copolymer of dimethyldiallylammonium chloride and acrylic acid (MERQUAT280, manufactured by NALCO, having a charge density of 5.0meq/g), a copolymer of dimethyldiallylammonium chloride and acrylamide (MERQUAT 550, MERQUAT 550PR, manufactured by NALCO, having a charge density of 3.2meq/g), polymethacryloxyethyltrimethylammonium chloride (manufactured by Kao, having a charge density of 4.8meq/g), and a copolymer of methylvinylimidazolium chloride and vinylpyrrolidone (LUVIVIAT QUEXCEL, manufactured by BASF, having a charge density of 6.1 meq/g; LUAT 550, manufactured by BASF, FC, having a charge density of 4.4 meq/g).

The cationic polymer as the component (F) is preferably a homopolymer of dimethyldiallylammonium chloride, a copolymer of dimethyldiallylammonium chloride and acrylic acid, or a copolymer of dimethyldiallylammonium chloride and acrylamide, from the viewpoints of quick foamability, foam amount, and wet feel after washing.

The component (F) can be used in 1 or 2 or more types, and the content thereof in the skin cleansing composition is preferably 0.001% by mass or more, more preferably 0.005% by mass or more, further preferably 0.01% by mass or more, and further preferably 0.3% by mass or less, more preferably 0.2% by mass or less, further preferably 0.1% by mass or less, from the viewpoint of improving the wet feeling after washing. The content of the component (F) in the skin cleansing composition is preferably 0.001 to 0.3% by mass, more preferably 0.005 to 0.2% by mass, and still more preferably 0.01 to 0.1% by mass.

In the present invention, the content of the (G) water as the remainder of each component in the skin cleansing composition is preferably 5% by mass or more, more preferably 10% by mass or more, and even more preferably 15% by mass or more, and further preferably 30% by mass or less, more preferably 28% by mass or less, and even more preferably 25% by mass or less, from the viewpoint of stability over the course of time. The content of the water of the component (G) in the skin cleanser composition is preferably 5 to 30% by mass, more preferably 10 to 28% by mass, and still more preferably 15 to 25% by mass.

The skin cleansing composition of the present invention may contain, in addition to the components (a) to (G), components used in general skin cleansing compositions, for example, surfactants other than the components (B), (C), and (E), water-soluble polymers other than the component (F), oil components, pH adjusters, bactericides, anti-inflammatory agents, preservatives, chelating agents, salts, pearlizing agents, scrub creams, perfumes, cooling agents, pigments, ultraviolet absorbers, antioxidants, plant extracts, and the like, within a range not impairing the effects of the present invention. These agents are not limited to the use of each agent, and can be used for other purposes depending on the purpose, for example, the use of a cooling agent as a perfume, or the use of a cooling agent and a perfume in combination with each other, for example, the effects of the cooling agent and the perfume can be exerted.

The skin cleanser composition of the present invention can contain an oily component from the viewpoint of improving the cleansing property. The content of the oil component in the skin cleansing composition is preferably 3% by mass or less, more preferably 2% by mass or less, even more preferably 1% by mass or less, and even more preferably 0.5% by mass or less, from the viewpoint of maintaining good quick-foaming properties, lather volume, lather fineness, and detergency. Here, the oil component refers to a hydrophobic substance separated from the aqueous phase, and includes oils and fats, hydrocarbon oils, ester oils, higher alcohols (having 10 or more carbon atoms), silicone oils, and the like.

Examples of the surfactant other than the components (B), (C), and (E) include anionic surfactants, cationic surfactants, amphoteric surfactants, and the like other than the components (B) and (C).

The skin cleansing composition of the present invention may further contain an anionic surfactant other than the components (B) and (C) from the viewpoint of improving detergency. Examples of the anionic surfactant other than the component (B) and the component (C) include fatty acid salts, alkylbenzenesulfonates, alkanesulfonates, alkenylsulfonates, alkylsulfonates, acyl isethionates, alkyl sulfate salts, alkyl ether sulfate salts, sulfo fatty acid methyl ester salts, fatty acid alkanolamide sulfate salts, monoacylglycerol sulfate salts, alkyl phosphate salts, polyoxyethylene alkyl ether phosphate salts, alkyl aryl ether phosphate salts, fatty acid amide ether phosphoric acid, ether carboxylic acids, and salts thereof. From the viewpoint of improving the stability over time, and maintaining a good after-wash feel, quick-foaming properties, foam quantity, and foam texture fineness, the content of the anionic surfactant other than the components (B) and (C) is preferably less than 30 mass%, more preferably less than 15 mass%, even more preferably less than 10 mass%, even more preferably 5 mass% or less, even more preferably 3 mass% or less, and even more preferably 1 mass% or less, relative to the total content of the components (B) and (C).

The skin cleanser composition of the present invention may further contain a cationic surfactant and/or an amphoteric surfactant, from the viewpoint of satisfactory wet feeling after washing. The content of the cationic surfactant and/or the amphoteric surfactant in the skin cleansing composition is preferably 5% by mass or less, more preferably 3% by mass or less, even more preferably 1% by mass or less, and even more preferably 0.5% by mass or less, from the viewpoint of maintaining good quick-foaming properties, lather volume, lather fineness, and detergency.

The skin cleanser composition of the present invention can be produced according to a usual method.

For example, the production can be performed by a method including the following steps 1, 2, 3, and 4.

Step 1: a step of adding the component (A), the component (D), the component (G) and any other component in this order and mixing them.

And a step 2: a step of adding and mixing component (B), component (C), component (E) and any other surfactant component in this order.

Step 3: adding the preparation obtained in the step 2 into the preparation obtained in the step 1, heating to 70-90 ℃, and uniformly mixing.

And step 4: and (3) cooling the preparation obtained in the step (3) to 20-35 ℃.

When the component (F) is added, the step 4 preferably includes a step of adding a predetermined amount of the component (F) and mixing the resultant product of the step 3 after cooling to a temperature in the range of 40 to 55 ℃.

When it is necessary to adjust the pH of the skin cleanser composition to a predetermined range, it is preferable that the step 1 further includes a step of adding and mixing a pH adjuster.

In addition, the pH of the skin cleanser composition of the present invention is preferably 4 or more, more preferably 5 or more, further preferably 5.5 or more, further preferably 6 or more, and further preferably 7.5 or less, more preferably 7.2 or less, further preferably 7 or less, from the viewpoint of improving stability over the course of time. The pH of the skin cleanser composition of the present invention is preferably 4 to 7.5, more preferably 5 to 7.2, even more preferably 5.5 to 7.2, and even more preferably 6 to 7.

The pH was measured by diluting the skin cleanser composition with water at 30 ℃ to give a 10 mass% diluted solution and measuring with a pH meter (F-22, manufactured by HORIBA Co., Ltd.).

As the pH adjuster for adjusting the pH, inorganic acids, organic acids, and the like can be used without limitation. Among these, from the viewpoint of suppressing precipitation in the preparation, the organic acid is preferable, 1 or 2 or more species selected from glycolic acid, citric acid, malic acid, succinic acid, tartaric acid, and lactic acid are more preferably contained, and 1 or 2 species selected from citric acid and malic acid are even more preferably contained.

The skin cleanser composition of the present invention can be suitably used as a skin cleanser that foams to wash, for example, a hand cleanser, a face cleanser, a makeup remover, a shower cream, a scalp cleanser, and the like.

The skin cleanser composition of the present invention is applied to the skin, more specifically, to any place such as the scalp, the face, the body, the hands and feet, preferably to the skin other than the scalp, and is rinsed with water for use.

The skin cleanser composition of the present invention is preferably in a semisolid state such as cream or paste. Here, the term "paste form (cream form)" does not mean an emulsion form, but means a form of paste (cream) which is not liquid, that is, a state in which fluidity is not present at room temperature, and fluidity is small even if present. The skin cleansing composition of the present invention preferably has a viscosity of 10000mPa · s or more at 25 ℃ when it is in the form of a paste, and more preferably 800000mPa · s or less from the viewpoint of water solubility. Here, the viscosity is a value measured at a rotation speed of 5rpm at the main axis T-A when the viscosity is 1000 mPas or more and less than 100000 mPas using a BSR type vertical screw (TV-B type, Tokyo meter), and a value measured at a rotation speed of 5rpm at the main axis T-B when the viscosity is 100000 mPas or more.

In addition, the skin cleanser composition of the present invention is preferably used by being filled in a tubular container.

The present invention also discloses the following compositions in relation to the above embodiments.

<1> a skin cleanser composition comprising the following components (A), (B), (C), (D) and (E), wherein the content of component (D) in the composition is 35-62% by mass.

(B) an N-acylamino acid salt;

(C) polyoxyethylene alkyl sulfosuccinates and/or alkyl sulfosuccinates;

(D) a polyol;

(E) a nonionic surfactant having HLB of 9 to 14.5.

<2> the skin cleansing composition according to <1>, wherein the hydroxyalkyl modified starch having 2 to 5 carbon atoms in the component (A) is preferably a hydroxyethylated starch and/or a hydroxypropylated starch obtained by reacting starch with ethylene oxide or propylene oxide.

<3> the skin cleansing composition according to <1> or <2>, wherein the crosslinked material of the component (A) preferably contains 1 or 2 or more selected from hydroxypropyl distarch phosphate and acetylated distarch adipate.

<4> the skin cleanser composition according to <1> above, wherein the cross-linked product of the component (A) is preferably a cross-linked product of hydroxyalkyl modified starch having 2 to 5 carbon atoms and acyl modified starch having 2 to 18 carbon atoms, which are cross-linked by an anionic P-O group, and more preferably hydroxypropyl starch phosphate.

<5> the skin cleansing composition according to any one of <1> to <4>, wherein the content of the component (a) in the skin cleansing composition is preferably 0.1% by mass or more, more preferably 0.2% by mass or more, further preferably 0.3% by mass or more, further preferably 0.5% by mass or more, further preferably 0.7% by mass or more, further preferably 1.0% by mass or more, and further preferably 4% by mass or less, more preferably 2.5% by mass or less, further preferably 2.0% by mass or less, further preferably 1.7% by mass or less, further preferably 1.5% by mass or less.

<6> the skin cleansing composition according to any one of the above <1> to <5>, wherein the amino acid residue in the N-acylamino acid salt of the component (B) is preferably an acidic amino acid or a neutral amino acid, more preferably 1 or 2 or more selected from glutamic acid, aspartic acid, glycine and alanine, still more preferably 1 or 2 selected from glutamic acid and glycine, and still more preferably glycine.

<7> the skin cleansing composition according to any one of <1> to <6> above, wherein the component (B) preferably contains at least 50% by mass or more, more preferably 70% by mass or more, and still more preferably 75% by mass or more of an N-acyl glycinate.

<8> the skin cleanser composition according to any one of the above <1> to <7>, wherein the acyl group in the N-acylamino acid salt of the component (B) is preferably a saturated or unsaturated, linear or branched acyl group having 10 or more and 20 or less carbon atoms, more preferably 10 or more and 18 or less, further preferably 10 or more and 16 or less, and still further preferably 10 or more and 14 or less.

<9> the skin cleansing composition according to any one of the above <1> to <8>, wherein the component (B) is preferably 1 or 2 or more selected from the group consisting of N-lauroyl glycine, N-lauroyl glutamic acid, N-myristoyl glycine, N-myristoyl glutamic acid, N-coconut fatty glycine, sodium salt, potassium salt, and triethanolamine salt of N-coconut fatty glutamic acid.

<10> the skin cleansing composition according to any one of the above <1> to <9>, wherein the content of the component (B) in the skin cleansing composition is preferably 10% by mass or more, more preferably 12% by mass or more, further preferably 15% by mass or more, further preferably 18% by mass or more, and further preferably 30% by mass or less, more preferably 28% by mass or less, further preferably 25% by mass or less, further preferably 22% by mass or less.

<11> the skin cleansing composition according to any one of the above <1> to <10>, wherein the polyoxyethylene alkyl sulfosuccinate and/or the alkyl sulfosuccinate of the component (C) preferably has a C12-22 monovalent hydrocarbon group in the alkyl chain, and more preferably has a C12-14 monovalent hydrocarbon group.

<12> the skin cleanser composition according to any one of <1> to <11>, wherein the component (C) preferably contains 1 or 2 or more selected from polyoxyethylene monoalkyl sulfosuccinates and monoalkyl sulfosuccinates, more preferably contains 1 or 2 selected from polyoxyethylene (3) disodium laureth sulfosuccinate and disodium laureth sulfosuccinate, and still more preferably contains disodium laureth sulfosuccinate.

<13> the skin cleansing composition according to any one of <1> to <12> above, wherein the content of the component (C) in the skin cleansing composition is preferably 0.5% by mass or more, more preferably 1.0% by mass or more, further preferably 1.5% by mass or more, further preferably 1.8% by mass or more, further preferably 2.0% by mass or more, further preferably 2.5% by mass or more, and further preferably 8% by mass or less, more preferably 7% by mass or less, further preferably 6.0% by mass or less, further preferably 5.5% by mass or less, further preferably 5.0% by mass or less, further preferably 4.5% by mass or less.

<14> the skin cleansing composition according to any one of <1> to <13> above, wherein the mass ratio (a)/(C) of the component (a) to the component (C) is preferably 0.1 or more, more preferably 0.15 or more, further preferably 0.25 or more, and further preferably 0.8 or less, more preferably 0.6 or less, further preferably 0.4 or less.

<15> the skin cleansing composition according to any one of the above <1> to <14>, wherein the mass ratio (B)/(C) of the component (B) to the component (C) is preferably 3.5 or more, more preferably 4 or more, further preferably 4.5 or more, and further preferably 15 or less, more preferably 13 or less, further preferably 11 or less.

<16> the skin cleanser composition according to any one of <1> to <15> above, wherein the polyol of the component (D) preferably contains 1 or 2 or more selected from the group consisting of (D1) diol and (D2) trihydric or higher alcohols.

<17> the skin cleanser composition according to <16>, wherein the (D1) diol preferably contains 1 or 2 or more selected from the group consisting of ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol and 1, 3-butanediol, and more preferably contains at least 1, 3-butanediol.

<18> the skin cleanser composition according to <16> or <17>, wherein the (D2) trihydric or higher alcohol preferably contains 1 or 2 or more species selected from the group consisting of glycerin, diglycerin, sorbitol, maltitol, and polyoxyethylene methyl glucoside, more preferably contains 1 or 2 or more species selected from the group consisting of glycerin, diglycerin, sorbitol, and maltitol, still more preferably contains 1 or 2 species selected from the group consisting of glycerin and diglycerin, and still more preferably contains at least glycerin.

<19> the skin cleansing composition according to any one of <1> to <18> above, wherein the component (D) preferably contains (D1) a diol and (D2) a trihydric or higher alcohol, and the content ratio of the component (D2) to the total amount of the component (D) [ (D1) + (D2) ] [ (D2)/((D1) + (D2)) ] is preferably 0.6 or more, more preferably 0.7 or more, further preferably 0.8 or more, and further preferably 0.98 or less, more preferably 0.95 or less.

<20> the skin cleanser composition according to <19> above, wherein the component (D2) is contained in the component (D) in an amount of preferably 60% by mass or more, more preferably 70% by mass or more, still more preferably 80% by mass or more, and further preferably 95% by mass or less.

<21> the skin cleansing composition according to any one of <1> to <20> above, wherein the polyhydric alcohol of the component (D) contains glycerin preferably in an amount of 60 mass% or more, more preferably 75 mass% or more.

<22> the skin cleansing composition according to any one of <1> to <21>, wherein the content of the component (D) in the skin cleansing composition is preferably 40% by mass or more, more preferably 42% by mass or more, further preferably 45% by mass or more, and further preferably 60% by mass or less, more preferably 58% by mass or less, further preferably 55% by mass or less.

<23> the skin cleanser composition according to any one of <1> to <22> above, wherein the HLB of the mixed surfactant composed of 1 kind of nonionic surfactant or 2 or more kinds of nonionic surfactants among the nonionic surfactants of the component (E) is preferably 9.5 or more, more preferably 10.5 or more, and further preferably 11 or more, and further preferably 14 or less, more preferably 13.5 or less, and further preferably 13 or less.

<24> the skin cleansing composition according to any one of the above <1> to <23>, wherein the nonionic surfactant of the component (E) preferably contains 1 or 2 or more selected from the group consisting of glycerin fatty acid esters, polyglycerin fatty acid esters, polyethylene glycol fatty acid esters, polyoxyethylene glycerin fatty acid esters, polyoxyethylene sorbitol fatty acid esters, (poly) alkyl glycerin ethers, polyoxyethylene alkyl ethers, sucrose fatty acid esters, and alkyl polyglucosides, and more preferably contains 1 or 2 or more selected from the group consisting of glycerin fatty acid esters and polyglycerin fatty acid esters.

<25> the skin cleanser composition according to any one of the above <1> to <24>, wherein the nonionic surfactant of the component (E) preferably contains 1 or 2 or more selected from the group consisting of polyglyceryl myristate-10 (HLB: 15), glyceryl stearate (HLB: 9), glyceryl monocaprylate (HLB: 7.2), glyceryl monocaprate (HLB: 6.5), polyglyceryl laurate-10 (HLB: 15.5) and polyglyceryl-4-lauryl ether (HLB: 12.3).

<26> the skin cleanser composition according to any one of <1> to <25> above, wherein the nonionic surfactant of the component (E) is preferably used by combining 2 or more nonionic surfactants having a high HLB and nonionic surfactants having a low HLB.

<27> the skin cleanser composition according to any one of the above <1> to <26>, wherein the nonionic surfactant of the component (E) is preferably a combination of 1 or more nonionic surfactants having HLB10 or more and 1 or more nonionic surfactants having HLB lower than 10, more preferably a combination of 1 or more nonionic surfactants having HLB 12 or more and 1 or more nonionic surfactants having HLB 6 or more and 9.5 or less.

<28> the skin cleanser composition according to any one of <1> to <27> above, wherein the content of the component (E) in the skin cleanser composition is preferably 1% by mass or more, more preferably 2% by mass or more, and still more preferably 4% by mass or more, and further preferably 12% by mass or less, more preferably 10% by mass or less, and still more preferably 8% by mass or less.

<29> the skin cleansing composition according to any one of <1> to <28>, which further comprises (F) a cationic polymer.

<30> the skin cleanser composition according to <29> above, wherein the cationic charge density of the cationic polymer of component (F) is preferably 2meq/g or more, more preferably 3 to 7 meq/g.

<31> the skin cleansing composition according to <29> or <30> above, wherein the cationic polymer of component (F) preferably contains 1 or 2 or more species selected from the group consisting of a homopolymer of dimethyldiallylammonium chloride, a copolymer of dimethyldiallylammonium chloride and acrylic acid, a copolymer of dimethyldiallylammonium chloride and acrylamide, polychloromethacryloyloxyethyltrimethylammonium chloride, and a copolymer of methylvinylimidazolium chloride and vinylpyrrolidone, more preferably contains 1 or 2 or more species selected from the group consisting of a homopolymer of dimethyldiallylammonium chloride, a copolymer of dimethyldiallylammonium chloride and acrylic acid, and a copolymer of dimethyldiallylammonium chloride and acrylamide.

<32> the skin cleanser composition according to any one of <29> to <31> above, wherein the content of the component (F) in the skin cleanser composition is preferably 001% by mass or more, more preferably 0.005% by mass or more, and still more preferably 0.01% by mass or more, and further preferably 0.3% by mass or less, more preferably 0.2% by mass or less, and still more preferably 0.1% by mass or less.

<33> the skin cleansing composition according to any one of <1> to <32> above, wherein the content of (G) water in the skin cleansing composition is preferably 5% by mass or more, more preferably 10% by mass or more, further preferably 15% by mass or more, and further preferably 30% by mass or less, more preferably 28% by mass or less, further preferably 25% by mass or less.

<34> the skin cleansing composition according to any one of <1> to <33> above, wherein the content of the oily component in the skin cleansing composition is preferably 3% by mass or less, more preferably 2% by mass or less, further preferably 1% by mass or less, and further preferably 0.5% by mass or less.

<35> the skin cleansing composition according to any one of <1> to <34> above, which further comprises an anionic surfactant other than the component (B) and the component (C), and the content thereof is preferably less than 30% by mass, more preferably less than 15% by mass, still more preferably less than 10% by mass, yet more preferably 5% by mass or less, yet more preferably 3% by mass or less, and yet more preferably 1% by mass or less, relative to the total content of the component (B) and the component (C).

<36> the skin cleanser composition according to any one of <1> to <35> above, which further comprises a cationic surfactant and/or an amphoteric surfactant, and the content thereof in the skin cleanser composition is preferably 5% by mass or less, more preferably 3% by mass or less, further preferably 1% by mass or less, and further preferably 0.5% by mass or less.

<37> the skin cleanser composition according to any one of <1> to <36> above, which is produced by a method comprising the following steps 1, 2, 3 and 4.

And a step 2: a step of adding and mixing the component (B), the component (C), the component (E) and, if necessary, other optional surfactant components in this order.

<38> the method for producing a skin cleanser composition according to any one of <1> to <36>, which comprises the following steps 1, 2, 3 and 4:

step 1: a step of adding and mixing component (A), component (D), component (G), a pH adjuster, and other optional components in this order;

and a step 2: a step of adding and mixing component (B), component (C), component (E), and any other surfactant component in this order;

step 3: adding the preparation obtained in the step 2 into the preparation obtained in the step 1, heating to 70-90 ℃, and uniformly mixing;

and step 4: and (3) cooling the product obtained in step (3), adding a predetermined amount of the component (F) to the product obtained in step (3) when the product is cooled to a temperature within the range of 40 to 55 ℃, mixing the mixture, and cooling the mixture to a temperature within the range of 20 to 35 ℃.

<39> the skin cleanser composition according to any one of <1> to <37> above, wherein the pH is preferably 4 or more, more preferably 5 or more, further preferably 5.5 or more, further preferably 6 or more, and further preferably 7.5 or less, more preferably 7.2 or less, further preferably 7 or less.

<40> the skin cleanser composition according to any one of <1> to <37> and <39> which is a hand cleanser, a face cleanser, a makeup remover, a shower gel, or a scalp cleanser.

<41> the skin cleansing composition according to any one of <1> to <37>, <39> and <40>, wherein the skin cleansing composition is preferably in the form of cream or paste, and the viscosity at 25 ℃ is preferably 10000 mPas or more, more preferably 800000 mPas or less.

<42> the skin cleansing composition according to any one of <1> to <37> and <39> to <41>, which is filled in a tubular container and used.

Examples

Examples 1 to 13 and comparative examples 1 to 11

Skin cleanser compositions having the compositions shown in tables 1 to 2 were prepared.

With respect to the obtained skin cleanser composition, the stability over time, quick-foaming property, foam amount, foam texture fineness, and wet feeling after washing were evaluated. The results are shown in tables 1 to 2.

(production method)

Step 1: mixing the components 1, 7, 8, 14 and 15, and stirring and mixing uniformly.

And a step 2: mixing the components 2-6 and 9-12, and stirring and mixing uniformly.

Step 3: the preparation of step 2 was added to the preparation of step 1, heated to 80 ℃ and mixed well.

And step 4: cooling the preparation of step 3, adding component 13 when the preparation of step 3 is at 50 deg.C, stirring and mixing, and cooling to 30 deg.C to obtain skin cleanser composition.

(evaluation method)

(1) Stability over time (25 ℃, 45 ℃)

Each skin cleanser composition was put into a 50mL transparent glass container, sealed, stored in a thermostatic bath at 25 ℃ or 45 ℃ for 3 months, and then evaluated visually according to the following criteria.

5: no change in appearance was observed.

4: very little oil microsuspension was observed on the surface.

3: significant oil slick was confirmed on the surface.

2: separation of fractions was confirmed.

1: separation was confirmed in the whole.

(2) Quick-foaming property:

0.5g of each skin cleanser composition was dissolved in water to prepare a 10 mass% aqueous solution, and stirred with a magnetic stirrer (REXIM RP-1A, AS-ONE Co., Ltd.) for 10 seconds (1500rpm) to foam. The volume of the formed foam was measured and evaluated according to the following criteria.

5: the foam volume was 25mL or more.

4: the foam volume is 20mL or more and less than 25 mL.

3: the foam volume is 15mL or more and less than 20 mL.

2: the foam volume is 10mL or more and less than 15 mL.

1: the foam volume was less than 10 mL.

(3) Foam amount:

0.5g of each skin cleanser composition was dissolved in water to prepare a 10 mass% aqueous solution, and stirred (1500rpm) for 1 minute with a magnetic stirrer (REXIM RP-1A, AS-ONE Co., Ltd.) to foam. The volume of the formed foam was measured and evaluated according to the following criteria.

5: the foam volume was 40mL or more.

4: the foam volume is 35mL or more and less than 40 mL.

3: the foam volume is 30mL or more and less than 35 mL.

2: the foam volume is 25mL or more and less than 30 mL.

1: the foam volume was less than 25 mL.

(4) Texture fineness of the foam:

0.5g of each skin cleanser composition was dissolved in water to prepare a 10 mass% aqueous solution, and stirred (1500rpm) for 1 minute using a magnetic stirrer (manufactured by REXIM RP-1A, AS-ONE Co., Ltd.) to form a foam. Then, an appropriate amount of the foam was transferred onto a cover glass, which was mounted on a glass slide, and the size of the foam was observed with an optical microscope (100 times). Regarding the bubble size, the bubble size was evaluated for any 10 bubbles in any visual field, using the arithmetic mean of the lengths of the major axis and the minor axis of the bubbles as the bubble size, according to the following criteria. The smaller the foam size, the finer the texture of the bubbles.

5: the arithmetic mean of the bubbles is below 150 μm.

4: the bubbles have an arithmetic average of 150 μm or more and less than 200 μm.

3: the bubbles have an arithmetic average of 200 μm or more and less than 250 μm.

2: the bubbles have an arithmetic mean of 250 μm or more and less than 300 μm.

1: the arithmetic mean of the bubbles is 300 μm or more.

(5) Wet feeling after washing:

the skin cleansing compositions were used by 5 panelists to wash the face, and the "wet feeling after washing" was evaluated in accordance with the following criteria 10 minutes after the face was washed. The results are expressed as average scores (1 st rounding off of the decimal point).

5: very good.

4: good results are obtained.

3: not good.

2: and (4) poor.

1: very poor.

The components used in the examples, comparative examples and formulation examples are described below.

*1: STRUCTURE XL (manufactured by Akzo Nobel)

*2: AMILITE GCK-11(Ajinomoto Co., Ltd.)

*3: AMISOFT CT-12 (manufactured by Ajinomoto Co., Ltd.)

*4: cosmatic soap CK-4N (manufactured by MIYOSHI OIL & FAT Co., Ltd.)

*5: PLANTAPON SUS (manufactured by BASF corporation)

*6: s Faith M-1001 (product of Banben pharmaceutical industries, Ltd.)

*7: MONTEX S (MIYOSHI OIL & FAT, Inc.)

*8: SUNSOFT No.700H (manufactured by Sun chemical Co., Ltd.)

*9: SUNSOFT No.760H (manufactured by Sun chemical Co., Ltd.)

*10: MERQUAT 550PR (manufactured by Lubrizol Advanced Materials Co., Ltd.) (substantial content: 9%)

*11: fermented soybean milk (made by Sanzhou pharmaceutical Co., Ltd.)

*12: TONISKIN (manufactured by Sflab corporation)

*13: centella extract BG70 (pill good pharmacy)

*14: malva sylvestris extract BG (manufactured by Wanshan pharmaceutical Co., Ltd.)

*15: LANACHRYS 2B (Lucas Meyer Cosmetics Co., Ltd.)

*16: NEPTIGEN N (Natural beauty and health products made by one pill)

*17: LIPIURE-PMB (manufactured by Nichiya corporation)

*18: sage extract BG-J (manufactured by Wanshan pharmaceutical Co., Ltd.)

*19: dried orange peel extract K65B (manufactured by Nichio oil Co., Ltd.)

*20: PHARCOS-DIHUANG (ICHIMARU PHARCOS Co., Ltd.)

*21: swertia herb extract-S (manufactured by Wanshan pharmaceutical Co., Ltd.)

*22: PHARCOS Zanthoxylum piperitum (manufactured by pill good pharmaceutical Co., Ltd.)

*23: jinjinxiang extract BG70 (made by Wanshan pharmaceutical Co., Ltd.)

*24: watercress KB (manufactured by Sflab corporation)

*25: fibroin N (manufactured by ICHIMARU PHARCOS)

Skin cleanser compositions having the compositions shown below were prepared in the same manner as in the examples.

Formulation example 1 (face washing agent) content (mass%)

The obtained skin cleanser composition has excellent high temperature stability, quick foaming property, large amount of foam, fine foam texture, and excellent foam quality, and can obtain wet touch after washing.

Claims

1. A skin cleanser composition characterized by:

contains the following components (A), (B), (C), (D) and (E), wherein the content of the component (D) in the composition is 35-62 mass%;

(B) an N-acylamino acid salt;

(C) polyoxyethylene alkyl sulfosuccinates and/or alkyl sulfosuccinates;

(D) a polyol;

(E) a nonionic surfactant having HLB of 9 to 14.5.

2. The skin cleanser composition of claim 1, wherein:

further contains (F) a cationic polymer.

3. The skin cleanser composition according to claim 1 or 2, wherein:

the mass ratio (A)/(C) of the component (A) to the component (C) is 0.1 to 0.8.

4. A skin cleanser composition according to any one of claims 1 to 3, characterized in that:

the mass ratio (B)/(C) of the component (B) to the component (C) is 4-15.

5. The skin cleanser composition according to any one of claims 1 to 4, wherein:

the polyol as the component (D) contains 60 mass% or more of glycerin.