JP7364503B2 - skin cleansing composition - Google Patents

Description

The present invention relates to a skin cleansing composition that is excellent in imparting a moist feeling to the skin after washing.

Conventionally, cleaning agents using amino acid surfactants have been known to have low irritation to the skin and are easy to use, and various improvements have been proposed for cleaning compositions containing amino acid surfactants. (Patent Documents 1 to 3). In recent years, there has been a demand in the market for skin cleansers that not only have excellent low irritation to the skin, but also can provide a moist feeling to the skin after washing.

Japanese Patent Application Publication No. 2000-87081 Japanese Patent Application Publication No. 2015-74696 Japanese Patent Application Publication No. 2019-14691

An object of the present invention is to provide a skin cleansing composition that is excellent in imparting a moist feeling to the skin after washing.

The present inventors have developed a detergent composition that is excellent in imparting a moist feeling to the skin after washing by incorporating specific amounts of a specific amino acid-based surfactant, a specific fatty acid polyglyceryl, and a highly polymerized polyethylene glycol. They discovered that a product can be obtained and completed the present invention.

That is, the present invention provides [1] a skin cleansing composition containing the following component (A), the following component (B), and the following component (C), wherein the content of the component (A) is 0.03 -7.0% by mass, the content of the component (B) is 0.03-7.0% by mass, and the content of the component (C) is 0.01-0.6% by mass. , a skin cleansing composition having a pH of 4.0 to 6.8,
Component (A): One or more amino acid surfactants selected from the group consisting of N-acylaspartate and N-acylglutamate Component (B): Fatty acid polyglyceryl with an average added mole number of 7 to 15 Component ( C): Highly polymerized polyethylene glycol having a number average molecular weight of 100,000 to 500,000 [2] The content of higher fatty acids and/or salts thereof in 100% by mass of the skin cleansing composition is less than 1.0% by mass. [1] The skin cleansing composition described in
[3] The content of the component (A) is 0.1 to 7.0% by mass, the content of the component (B) is 0.1 to 6.0% by mass, and the component (C) The skin cleansing composition according to [1] or [2], wherein the content is 0.03 to 0.6% by mass.

According to the present invention, it is possible to provide a detergent composition that is excellent in imparting a moist feeling to the skin after washing.

<Skin cleansing composition>
The skin cleansing composition according to the present embodiment includes one or more amino acid surfactants selected from the group consisting of N-acylaspartate and N-acylglutamate, and a fatty acid having an average added mole number of 7 to 15. Contains polyglyceryl and highly polymerized polyethylene glycol with a number average molecular weight of 100,000 to 500,000 as essential components. In this specification, one or more amino acid surfactants selected from the group consisting of N-acylaspartate and N-acylglutamate are referred to as "component (A)"; the average number of moles added is 7 to 7. The fatty acid polyglyceryl No. 15 is sometimes referred to as "component (B)"; the highly polymerized polyethylene glycol having a number average molecular weight of 100,000 to 500,000 is sometimes referred to as "component (C)".

The content of each of the above-mentioned components contained in the skin cleansing composition according to the present embodiment is determined as appropriate from within the stated range so that the total content in the cosmetic composition is 100% by mass or less. You can choose.

[Component (A): one or more amino acid surfactants selected from the group consisting of N-acylaspartate and N-acylglutamate]
From the viewpoint of improving foam quality, the skin cleansing composition according to the present embodiment contains N-acylaspartate (hereinafter sometimes referred to as "ingredient (A1)") and N-acylglutamate (hereinafter "component (A1)"). It is characterized by containing one or more amino acid-based surfactants selected from the group consisting of component (A2).

Examples of the acyl group constituting N-acylaspartate and N-acylglutamate include linear or branched, saturated or unsaturated acyl groups having 8 to 24 carbon atoms (preferably 12 to 22 carbon atoms). Examples include aliphatic acyl groups. Specifically, examples include octanoyl group, decanoyl group, lauroyl group, myristoyl group, palmitoyl group, stearoyl group, isostearoyl group, oleoyl group, linoleoyl group, behenyl group, acyl group derived from coconut oil fatty acid (hereinafter referred to as coconut (hereinafter referred to as palm kernel oil fatty acid acyl), acyl groups derived from palm kernel oil fatty acids (hereinafter referred to as palm kernel oil fatty acid acyl), and the like.

Examples of the salts constituting N-acylaspartate and N-acylglutamate include alkali metal salts such as sodium salts and potassium salts; alkanolamine salts such as monoethanolamine salts, diethanolamine salts, and triethanolamine salts; can be mentioned.

Specific examples of N-acylaspartates include potassium N-coconut oil fatty acid acylaspartate, sodium N-coconut oil fatty acid acylaspartate, triethanolamine N-coconut oil fatty acid acylaspartate, and N-palm kernel. Examples include ammonium oil fatty acid acylaspartate, sodium N-lauroyl aspartate, triethanolamine N-lauroyl aspartate, and the like.

Specific examples of N-acylglutamates include potassium N-coconut oil fatty acid acylglutamate, sodium N-coconut oil fatty acid acylglutamate, triethanolamine of N-coconut oil fatty acid acylglutamate, and N-palm kernel oil fatty acid acylglutamate. Examples include ammonium, sodium N-lauroylglutamate, and triethanolamine N-lauroylglutamate.

The N-acylaspartate (A1) and N-acylglutamate (A2) listed above may be used alone or in combination of two or more.

The content of component (A) in 100% by mass of the skin cleansing composition is 0.03% by mass or more, preferably 0.1% by mass or more, and 0.3% by mass from the viewpoint of improving foam quality in a weakly acidic environment. It is more preferably at least 0.5% by mass, and even more preferably at least 0.5% by mass. Moreover, from the viewpoint of formulation stability, the content is 7.0% by mass or less, preferably 6.0% by mass or less, and more preferably 4.5% by mass or less.

[Component (B): fatty acid polyglyceryl with an average added mole number of 7 to 15]
As used herein, "fatty acid polyglyceryl" means a monoester or diester of fatty acid and polyglycerin. The number of carbon atoms in the fatty acids constituting these fatty acid esters is preferably 8 to 24, more preferably 10 to 22, even more preferably 12 to 20.

Examples of fatty acids constituting the fatty acid polyglyceryl include lauric acid, tridecylic acid, myristic acid, pentadecylic acid, palmitic acid, margaric acid, stearic acid, oleic acid, arachidic acid, behenic acid, isocaprylic acid, isoperargonic acid, and isocapric acid. acids, isoundacanoic acid, isolauric acid, isotridecylic acid, isomyristic acid, isopentadecylic acid, isopalmitic acid, isomargaric acid, isostearic acid, isononadecanoic acid, isoaracic acid, isoheneicosanoic acid, isobehenic acid, and the like. Among these, lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, behenic acid, and isostearic acid are preferred.

The average number of added moles of the fatty acid polyglyceryl is 7 or more, preferably 8 or more, and more preferably 10 or more from the viewpoint of improving the moist feeling and the stability of the formulation. On the other hand, from the viewpoint of suppressing stickiness and the viewpoint of formulation stability, it is 15 or less, preferably 14 or less, and more preferably 12 or less.

The content of the fatty acid polyglyceryl in 100% by mass of the skin cleansing composition is 0.03% by mass or more, preferably 0.1% by mass or more, and more preferably 0.5% by mass or more from the viewpoint of improving the moist feeling. preferable. On the other hand, from the viewpoint of suppressing stickiness, the content is 7.0% by mass or less, preferably 6.0% by mass or less, more preferably 4.0% by mass or less, even more preferably 3.0% by mass or less, and 1.8% by mass or less. % or less is particularly preferable.

[Component (C): Highly polymerized polyethylene glycol with a number average molecular weight of 100,000 to 500,000]
The skin cleansing composition according to this embodiment contains highly polymerized polyethylene glycol from the viewpoint of improving foam quality and moisturizing feeling.

The number average molecular weight (Mn) of the highly polymerized polyethylene glycol is 100,000 or more, preferably 200,000 or more, from the viewpoint of improving moist feeling. On the other hand, from the viewpoint of suppressing sliminess, it is 500,000 or less, preferably 400,000 or less.

The content of the highly polymerized polyethylene glycol in 100% by mass of the skin cleansing composition is 0.01% by mass or more from the viewpoint of improving foam quality by providing an appropriate viscosity and improving the moist feeling. The content is preferably .03% by mass or more, more preferably 0.1% by mass or more. On the other hand, from the viewpoint of suppressing foam quality deterioration due to viscosity increase and from the viewpoint of suppressing sliminess, the content is 0.6% by mass or less, preferably 0.5% by mass or less, and more preferably 0.4% by mass or less.

(Other ingredients)
In addition to the above-mentioned components, the skin cleansing composition according to the present embodiment includes a surfactant other than the above, a polyhydric alcohol other than highly polymerized polyethylene glycol, a higher fatty acid or a salt thereof, a chelating agent, a preservative, and an antioxidant. agents, thickeners, cooling agents, silicones, vitamins, animal and plant extracts, powders, pearlizing agents, colorants, fragrances, ultraviolet absorbers, whitening agents, bactericidal agents, anti-inflammatory agents, pH adjusters, and A solvent or the like may be added.

Examples of surfactants other than those listed above include glyceryl monostearate, polyethylene glycol monostearate, polyethylene glycol distearate, sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, sucrose fatty acid ester, polyoxyethylene alkyl ether, and Nonionic surfactants such as oxyethylene polyoxypropylene alkyl ether, polyoxyethylene alkylphenyl ether, polyoxyethylene cholesterol ether, polyoxyethylene phytosterol ether, polyoxyethylene hydrogenated castor oil, fatty acid alkylolamide; acylmethyl laurate Anionic surfactants such as taurine salt, polyoxyethylene acetate ether salt, alkyl acyl glutamate, alkyl acyl glycine salt, alkyl phosphate, polyoxyethylene alkyl phosphate acid; distearyldimethylammonium chloride, stearyltrimethylammonium chloride , cationic surfactants such as stearyldimethylbenzyl ammonium chloride; amphoteric surfactants such as alkylamidopropyl betaine, alkylaminoacetic acid betaine, alkylimidazolium betaine, and alkylhydroxyethyl betaine. The above-mentioned surfactants may be used alone or in combination of two or more.

As the polyhydric alcohol other than highly polymerized polyethylene glycol, known humectants used as raw materials for cosmetics can be used. Specific examples of polyhydric alcohols include ethylene glycol, propylene glycol, dipropylene glycol, 1,3-butylene glycol, glucose, maltose, maltose, sucrose, mannitol, sorbitol, 1,2-pentanediol, 1,2 -hexanediol, 1,2-octanediol, and the like. The above-mentioned polyhydric alcohols may be used alone or in combination of two or more.

Examples of higher fatty acids or salts thereof include lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, isostearic acid, isobehenic acid, and salts thereof. Other specific examples of higher fatty acids include vegetable oils and fats such as olive oil, coconut oil, palm oil, and cottonseed oil; and animal oils and fats such as fish oil and beef tallow.

The content of higher fatty acids (for example, fatty acids having 8 to 24 carbon atoms) and/or their salts in 100% by mass of the skin cleansing composition is preferably less than 1.0% by mass, more preferably less than 0.1% by mass. Preferably, substantially no content (for example, less than 0.01% by mass in 100% by mass of the skin cleansing composition) is more preferred. Although foaming properties and foam quality can be improved by containing higher fatty acids, it is necessary to neutralize them, making it impossible to maintain the pH of the present invention, which tends to worsen skin irritation.

Examples of chelating agents include edetic acid, nitrilotriacetic acid, hydroxyethylethylenediaminetriacetic acid, diethylenetriaminepentaacetic acid, triethylenetetraminehexaacetic acid, cyclohexanediaminepentaacetic acid, glycine, serine, alanine, lysine, cystine, tyrosine, methionine, and ascorbic acid. Acid, citric acid, malic acid, tartaric acid, lactic acid, oxalic acid, malonic acid, maleic acid, erythorbic acid, succinic acid, fumaric acid, pyruvic acid, salicylic acid, polyacrylic acid, polymaleic acid, pyrophosphate, tripolyphosphate, polyphosphoric acid Examples include acids, orthophosphoric acid, and salts thereof, and edetic acid and its salts are preferably used.

Examples of preservatives include benzoic acid, phenoxyethanol, octoxyglycerin, and methylparaben. Benzoic acid is preferred from the viewpoint of being weakly acidic and exhibiting an excellent antiseptic effect.

Examples of antioxidants include dibutylhydroxytoluene, butylhydroxyanisole, propyl gallate, octyl gallate, α-tocopherol, β-tocopherol, γ-tocopherol, δ-tocopherol, natural vitamin E, erythorbic acid, orthotolyl biguanide. , dilauryl thiodipropionate, parahydroxyanisole, and phytic acid.

Examples of thickeners include natural polymer compounds such as gum arabic, gum tragacanth, guar gum, locust bean gum, gum karaya, iris moss, quince seed, gelatin, shellac, rosin, and casein; hydroxypropylcellulose, hydroxypropylmethylcellulose, Semi-synthetic polymer compounds such as carboxymethylcellulose, hydroxyethylcellulose, methylcellulose, ethylcellulose, sodium alginate, ester gum, nitrocellulose, crystalline cellulose; polyvinyl alcohol, polyvinylpyrrolidone, sodium polyacrylate, carboxyvinyl polymer, polyvinylmethylcellulose, polyamide resin, etc. Synthetic polymer compounds and the like can be mentioned.

Examples of the refreshing agent include l-menthol, camphor, and l-menthyl glyceryl ether.

Examples of the solvent include water and alcohols such as ethanol.

(Other details of the skin cleanser composition)
The pH of the skin cleansing agent according to the present embodiment is 4.0 or higher, preferably 4.5 or higher, from the viewpoint of improving foam quality and suppressing skin irritation. On the other hand, from the viewpoint of ensuring the preservative power of the preparation, it is 6.8 or less, preferably 6.5 or less.

The dosage form of the skin cleansing agent according to the present embodiment is not particularly limited, and may be a cream, gel, liquid, etc. However, from the viewpoint of exhibiting the effects of the present invention, a cream-like dosage form is preferable. preferable.

Applications of the skin cleansing composition according to the present embodiment include, for example, facial cleansers, shampoos, body shampoos, hand soaps, shaving agents, and the like.

Since the skin cleansing composition according to the present embodiment has excellent foam quality, it is preferably used by being filled in a pump former container. The pump former container that can be used in this embodiment is not particularly limited, and includes commercially available pump former containers. A skin cleansing product is obtained by filling a pump former container with the skin cleansing composition according to this embodiment. The skin cleansing product is a skin cleansing product that includes at least a pump former container and the skin cleansing agent of the present invention filled in the pump former container.

The skin cleansing agent according to the present embodiment can be produced by mixing the above components and stirring the mixture using a known method, for example, using a paddle mixer.

Hereinafter, the present invention will be explained in more detail based on Examples, but the present invention is not limited only to these Examples. In addition, unless otherwise specified, the blending amount is the blending amount of the active ingredient, and is expressed in "mass %".

Various materials used in Examples and Comparative Examples are listed below.
Sodium N-lauroyl-L-aspartate: Aminoformer FLDS-L manufactured by Asahi Kasei Finechem Co., Ltd.
N-coconut oil fatty acid acyl-L-glutamic acid triethanolamine: Aminosurfact ACMT-L manufactured by Asahi Kasei Finechem Co., Ltd.
N-coconut oil fatty acid acylglycine potassium: amirite GCK-12K manufactured by Ajinomoto Healthy Supply Co., Ltd.
Sodium lauroylmethyl-β-alanine: Alanone ALE manufactured by Kawaken Fine Chemicals Co., Ltd.
Polyglyceryl monolaurate-10: NIKKOL DECAGLYN 1-L manufactured by Nikko Chemicals Co., Ltd.
Polyglyceryl myristate-10: Glysurf 10MM manufactured by Aoki Yushi Kogyo Co., Ltd.
Polyglyceryl-10 monostearate: NIKKOL DECAGLYN 1-SV manufactured by Nikko Chemicals Co., Ltd.
Polyglyceryl-10 diisostearate: Sunsoft Q-192Y-C manufactured by Taiyo Kagaku Co., Ltd.
Polyglyceryl-10 dioleate: Sunsoft Q-172Y-C manufactured by Taiyo Kagaku Co., Ltd.
Polyglyceryl monostearate-5: Sunsoft series manufactured by Taiyo Kagaku Co., Ltd. Glyceryl monolaurate: Sunsoft No. 5 manufactured by Taiyo Kagaku Co., Ltd. 750-C
PEG-7M: POLYOX WSR N-750 manufactured by Dow Chemical Japan Co., Ltd.
PEG-90M: POLYOX WSR 301 manufactured by Dow Chemical Japan Co., Ltd.
PEG-400: PEG #20000 manufactured by NOF Corporation

(Example and comparative example)
After preparing the skin cleansing compositions of Examples 1 to 12 and Comparative Examples 1 to 13 according to the compositions (compounding amounts) shown in Tables 1 and 2, each sample was filled into a pump former. Each of the obtained samples was evaluated as follows by a panel of 10 male sensory evaluation members.

<Evaluation of ease of washing>
1 g of each mixed solution of 0.1 g of each sample and 0.9 g of water was lathered with a nylon towel and rubbed into the hands for 30 seconds. Thereafter, the sample was washed with running water at 40°C, and the ease of washing was evaluated based on the time taken for the sample to be completely washed off using the following evaluation criteria. In addition, for the evaluation, the evaluation result obtained by the largest number of people was used as the score for each sample.
A (excellent): Completely washed off within 10 seconds B (usable): Completely washed off in more than 10 seconds and within 20 seconds C (poor): Does not feel completely washed off even after 20 seconds of running. , leaves a slimy feeling

<Evaluation of moist feeling after washing>
1 g of each mixed solution of 0.1 g of each sample and 0.9 g of water was lathered with a nylon towel and rubbed into the hands for 30 seconds. Thereafter, the skin was rinsed with running water at 40° C., and after 5 minutes of towel drying, the feel of the skin was sensory evaluated according to the following evaluation criteria. In addition, for the evaluation, the evaluation result obtained by the largest number of people was used as the score for each sample.
A (Excellent): Excellent moist feeling, no degreasing or stickiness B (usable): Moist feeling, no degreasing or stickiness C1 (Poor): Strong degreasing feeling C2 (Poor) ): The more you feel the stickiness, the more you feel the residue.

<Evaluation of foaming property>
1 g of each mixed solution of 0.1 g of each sample and 0.9 g of water was lathered with a nylon towel, and the foaming properties were evaluated based on the number of times required for foaming based on the following evaluation criteria. In addition, for the evaluation, the evaluation result obtained by the largest number of people was used as the score for each sample.
A (excellent): Foam forms after 10 times of whisking B (usable): Foam forms after 11 to 20 times of whisking C (poor): Foam does not form even after 20 times of whisking

<Immediate turbidity evaluation>
The appearance of each sample immediately after preparation was visually and sensory evaluated according to the following evaluation criteria. In addition, for the evaluation, the evaluation result obtained by the largest number of people was used as the score for each sample.
A (excellent): Clear with no turbidity B (poor): There is turbidity

From the results in Tables 1 and 2, the skin cleansing composition of the present invention, which contains specific amounts of a specific amino acid surfactant, specific fatty acid polyglyceryl, and highly polymerized polyethylene glycol, leaves the skin feeling moisturized after washing. It can be seen that it is excellent in imparting. It also shows that it has excellent foaming properties and is easy to wash away. Note that other evaluations were not performed for samples in which turbidity was observed immediately after preparation and samples in which foam did not form even after whisking 20 times (Comparative Examples 1 to 5, 11).

Prescription example 1
Sodium N-lauroyl-L-aspartate solution 3.00% by mass
Sodium polyoxyethylene lauryl ether sulfate 3.00% by mass
Glyceryl monolaurate 3.00% by mass
Polyethylene glycol monostearate 3.00% by mass
Lauric acid amidopropyl betaine liquid 3.00% by mass
Dipropylene glycol 2.00% by mass
Polyglyceryl-10 monolaurate 1.00% by mass
Hydroxypropyl methylcellulose 0.20% by mass
PEG-7M (Mn: approx. 300,000) 0.20% by mass
Benzoic acid 0.20% by mass
Water Total balance 100% by mass

The skin cleansing composition of the present invention can be used as a skin cleansing composition that is excellent in imparting a moist feeling to the skin after washing.

Claims (3)

A skin cleansing composition containing the following component (A), the following component (B), and the following component (C),
The content of the component (A) is 0.03 to 7.0% by mass,
The content of the component (B) is 0.03 to 7.0% by mass,
The content of the component (C) is 0.01 to 0.6% by mass,
A skin cleansing composition having a pH of 4.0 to 6.8.
Component (A): One or more amino acid surfactants selected from the group consisting of N-acylaspartate and N -acylglutamate (provided that N-acylaspartate and N-acylglutamate constitute The acyl group is an aliphatic acyl group having 8 to 24 carbon atoms)
Component (B): fatty acid polyglyceryl with an average number of added moles of 7 to 15 (however, the number of carbon atoms in the fatty acid constituting the fatty acid ester is 8 to 24)
Component (C): Highly polymerized polyethylene glycol with a number average molecular weight of 100,000 to 500,000 The skin cleansing composition according to claim 1, wherein the content of the higher fatty acid and/or its salt in 100% by mass of the skin cleansing composition is less than 1.0% by mass. The content of the component (A) is 0.1 to 7.0% by mass,
The content of the component (B) is 0.1 to 6.0% by mass,
The skin cleansing composition according to claim 1 or 2, wherein the content of the component (C) is 0.03 to 0.6% by mass.