Skin cleansing agent

Abstract

To provide a skin cleansing agent which is superior in quick foamability and foam quality, as well as in usability after rinsing.SOLUTION: A skin cleansing agent comprises (A) oleoyl glycine or a salt thereof, where the content of (A) is 20 mass% or more based on the total amount of N-acyl glycine or salts thereof.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a skin cleansing agent. [Background technology]

[0002] Skin cleansers contain surfactants to remove sebum, cosmetics, etc. Depending on the type of surfactant used, skin cleansers can cause a feeling of tightness or dryness, so a pleasant feeling after washing is required.

[0003] Powdered (granular) skin cleansing agents are known as skin cleansing agents. Powdered skin cleansing agents contain less moisture than liquid or gel types, making it possible to incorporate ingredients that are easily inactivated by moisture. In addition, they can be commercialized without incorporating preservatives or bactericides, making it possible to provide products with higher safety. The present applicant has proposed a powdered skin cleansing agent that reduces the feeling of tightness and dryness after washing and leaves the skin feeling smooth (Patent Documents 1 to 3). Powdered skin cleansers have an excellent feel after washing, but because they need to be foamed well when used, there is a certain percentage of consumers who prefer foamed or liquid skin cleansers that are easy to foam and use. On the other hand, it is difficult for foamed or liquid skin cleansers to leave the skin feeling smooth after washing. There is a demand for skin cleansers that provide an excellent feel on the skin after use, such as a smooth feeling after washing, a moist feeling, a veil-like feeling, or a silky feeling, and the like. Therefore, it is an issue to provide a skin cleansing agent that has a smooth feeling after washing, like a powdered skin cleanser, even in a foam or liquid form. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2017-137272 A [Patent Document 2] JP 2017-137273 A [Patent Document 3] JP 2020-142999 A Summary of the Invention [Problem to be solved by the invention]

[0005] The present invention aims to provide a skin cleansing agent which is excellent in quick foaming and foam quality, and also has an excellent feeling after washing. [Means for solving the problem]

[0006] The means for solving the problems of the present invention are as follows. 1. (A) Contains oleoylglycine or a salt thereof, A skin cleansing agent comprising (A) in an amount of 20% by mass or more based on the total amount of N-acylglycine or a salt thereof. 2. (B) N-acylamino acid or its salt other than N-acylglycine or its salt 1. The skin cleansing agent according to claim 1, 3. (C) Fatty acid or its salt 3. The skin cleansing agent according to claim 1 or 2, characterized in that it contains 4. The skin cleansing agent according to any one of 1. to 3., comprising 3% by mass or more and 33% by mass or less of (A) relative to the total amount of surfactants. Effect of the Invention

[0007] The skin cleansing agent of the present invention has excellent foaming speed and foam quality, and leaves a smooth feeling after washing. The smooth feeling refers to a state in which the fingers move smoothly when touching the skin, that is, a state in which the fingers move without resistance. It can also be said that the feeling is not sticky, slimy, or catching due to friction. The skin cleansing agent of the present invention causes little tightness or dryness after washing, so it is less likely to give rise to negative impressions such as the cleansing removing necessary moisture or damaging the skin. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] The present invention includes (A) oleoylglycine or a salt thereof, The present invention relates to a skin cleansing agent containing 20% ​​by mass or more of (A) based on the total amount of N-acylglycine or a salt thereof.

[0009] (A) Component: oleoylglycine or its salt Oleoylglycine is an anionic surfactant obtained by the acylation reaction of the amino acid glycine with the fatty acid oleic acid. Examples of the oleoylglycine salt include alkali metal salts such as sodium and potassium, alkanolamine salts such as triethanolamine, and basic amino acid salts such as lysine and arginine.

[0010] The skin cleansing agent of the present invention may contain an N-acylglycine or a salt thereof other than the component (A). Examples of the acyl group of N-acylglycine or its salt other than the component (A) include an octanoyl group, a decanoyl group, a lauroyl group, a myristoyl group, a palmitoyl group, a stearoyl group, a linoleyl group, and a coconut oil fatty acid acyl group (cocoyl group). Examples of the salt include an alkali metal salt such as sodium or potassium, an alkanolamine salt such as triethanolamine, and a basic amino acid salt such as lysine or arginine. Note that the coconut oil fatty acid is a mixed fatty acid such as lauric acid, myristic acid, palmitic acid, and oleic acid, and the cocoyl glycine contains about 5 to 9% by mass of oleoyl glycine.

[0011] The skin cleansing agent of the present invention contains (A) oleoylglycine or a salt thereof in an amount of 20% by mass or more based on the total amount of N-acylglycine or a salt thereof. From the viewpoint of the feeling after washing, this content is preferably 22% by mass or more, and more preferably 24% by mass or more.

[0012] From the viewpoint of the feeling after washing, the skin cleanser of the present invention preferably contains 2% by mass or more of the (A) component relative to the total amount of the skin cleanser, more preferably 3% by mass or more, even more preferably 4% by mass or more, and even more preferably 5% by mass or more. From the viewpoint of foam quality, the skin cleanser preferably contains 30% by mass or less of the (A) component relative to the total amount of the skin cleanser, more preferably 20% by mass or less, even more preferably 15% by mass or less, and even more preferably 10% by mass or less.

[0013] (B) Component: N-acylamino acid or its salt other than N-acylglycine or its salt The skin cleansing agent of the present invention preferably contains (B) an N-acylamino acid or a salt thereof other than N-acylglycine or a salt thereof. Component (B) is an anionic surfactant. The acyl group of component (B) may be linear or branched, derived from a saturated or unsaturated fatty acid having 8 to 22 carbon atoms. Examples of the fatty acid include caprylic acid, capric acid, lauric acid, myristic acid, stearic acid, palmitic acid, linoleic acid, etc., and one or more of these may be mixed and used. Also, a mixed fatty acid containing two or more fatty acids such as coconut oil fatty acid, palm fatty acid, palm kernel fatty acid, and hardened beef tallow fatty acid may be used.

[0014] Examples of the amino acids in component (B) include alanine, valine, leucine, isoleucine, serine, threonine, proline, β-alanine, α-aminobutyric acid, γ-aminobutyric acid, sarcosine, taurine, methyltaurine, N-methyl-β-alanine, glutamic acid, and aspartic acid. Examples of the salt include alkali metal salts such as sodium and potassium, alkanolamine salts such as triethanolamine, and basic amino acid salts such as lysine and arginine. The N-acylamino acid salt of component (B) preferably includes cocoyl glutamate, cocoyl alanine salt, and cocoyl aspartate.

[0015] From the standpoint of rapid foaming ability, the skin cleanser of the present invention preferably contains 0.5% by mass or more of component (B) relative to the total amount of the skin cleanser, more preferably 1.0% by mass or more, and even more preferably 1.5% by mass or more, and preferably contains 30% by mass or less, more preferably 25% by mass or less, and even more preferably 20% by mass or less. When the skin cleansing agent of the present invention contains component (B), the mass ratio of component (B) to component (A) ((B) / (A)) is preferably 0.10 or more, and more preferably 0.15 or more, from the viewpoint of the feel after washing, and is preferably 5.0 or less, and more preferably 4.0 or less.

[0016] (C) Component: fatty acid or its salt The skin cleansing agent of the present invention preferably contains (C) a fatty acid or a salt thereof. Component (C) is an anionic surfactant. The fatty acid of component (C) may be a straight-chain or branched saturated or unsaturated fatty acid having 8 to 22 carbon atoms, such as caprylic acid, capric acid, lauric acid, myristic acid, stearic acid, oleic acid, palmitic acid, linoleic acid, etc., and one or more of these may be mixed and used. Also, a mixed fatty acid containing two or more fatty acids such as coconut oil fatty acid, palm fatty acid, palm kernel fatty acid, and hardened beef tallow fatty acid may be used. Examples of the salt include alkali metal salts such as sodium and potassium, alkanolamine salts such as triethanolamine, and basic amino acid salts such as lysine and arginine. The fatty acid of component (C) preferably includes lauric acid, myristic acid, palmitic acid, and stearic acid.

[0017] From the standpoint of foam quality, the skin cleanser of the present invention preferably contains component (C) in an amount of 1.0 mass% or more, more preferably 2.0 mass% or more, and even more preferably 5.0 mass% or more, and preferably 30 mass% or less, more preferably 25 mass% or less, and even more preferably 20 mass% or less, based on the total amount of the skin cleanser. When the skin cleansing agent of the present invention contains component (C), the mass ratio of component (C) to component (A) ((C) / (A)) is preferably 0.50 or more, and more preferably 0.75 or more, from the viewpoint of the feel after washing, and is preferably 5.0 or less, and more preferably 4.0 or less.

[0018] In addition to the essential component (A) and the optional components (B) and (C), the skin cleanser of the present invention may contain anionic surfactants, amphoteric surfactants, cationic surfactants, and nonionic surfactants as long as they do not adversely affect the effects of the present invention. The total amount of all surfactants in the skin cleanser of the present invention is preferably 15% by mass or more, more preferably 20% by mass or more, based on the total amount of the skin cleanser, from the viewpoint of foam quality, and is preferably 45% by mass or less, more preferably 40% by mass or less, based on the viewpoint of rapid foaming. In addition, the skin cleanser of the present invention preferably contains 3% by mass or more and 33% by mass or less of the (A) component based on the total amount of the surfactant, based on the feeling of use and foam quality. The content of the (A) component based on the total amount of the surfactant is more preferably 5% by mass or more, more preferably 7% by mass or more, even more preferably 10% by mass or more, more preferably 31% by mass or less, even more preferably 29% by mass or less, and even more preferably 27% by mass or less. Furthermore, the skin cleansing agent of the present invention may contain alcohols, polyhydric alcohols, sugars, sugar alcohols, clay minerals, thickeners, colorants, excipients, pigments, inorganic powders, plant extracts, pH adjusters, salts, preservatives, sequestering agents, fragrances, etc. In addition, it may contain other medicinal ingredients and physiologically active ingredients.

[0019] Examples of polyhydric alcohols, sugars, and sugar alcohols include glycerin, diglycerin, 1,3-butylene glycol, propylene glycol, dipropylene glycol, 1,2-pentanediol, glucose, sorbitol, mannose, mannitol, galactose, galactitol, maltose, maltitol, trehalose, erythrose, erythritol, xylose, xylitol, sucrose, lactose, lactitol, difructose anhydride, methyl gluceth-10, PPG-10 methyl glucose, and glycereth-26.

[0020] Examples of preservatives include methylparaben and ethylparaben. Examples of the sequestering agent include disodium ethylenediaminetetraacetate, edetic acid, and edetate salts such as sodium edetate. Examples of clay minerals include bentonite and kaolin. The thickening agent may include carbomer. Examples of medicinal ingredients include vitamin C compounds such as L-ascorbic acid, L-ascorbic acid phosphate, L-ascorbic acid monopalmitate, L-ascorbic acid dipalmitate, and L-ascorbic acid 2-glucoside; skin whitening agents such as glutathione and saxifrage extract; skin activators such as royal jelly and beech extract; blood circulation promoters such as capsaicin, zingerone, cantharides tincture, caffeine, tannic acid, and γ-oryzanol; anti-inflammatory agents such as glycyrrhizinic acid derivatives and azulene; and lysozyme chloride.

[0021] The formulation of the skin cleansing agent of the present invention is not particularly limited, and may be any of foam, gel, powder, granule, solid, liquid, aerosol, etc. Furthermore, the skin cleansing agent of the present invention can be used as a face wash, body soap, hand soap, etc. EXAMPLES

[0022] The components listed in Tables 1 to 4 were heated to 80°C, mixed to homogenize, and cooled to room temperature to obtain a skin cleanser. Oleoyl glycine K was obtained by subjecting oleoyl glycine to the Schotten-Baumann reaction from oleic acid chloride and glycine, followed by ion exchange. Fatty acid glycine salts other than cocoyl glycine K and oleoyl glycine K in Table 3 were also obtained in the same manner. The fatty acid salts in Tables 2 and 4 are mixtures of potassium lauric acid, potassium myristic acid, and potassium palmitic acid.

[0023] The obtained skin cleansing agent was subjected to the following evaluations. The results are shown in Table 1. Evaluation items - Smooth feeling after washing ·Fast foaming · Foam quality (fineness of foam, elasticity of foam) Evaluation method Take an appropriate amount of skin cleanser in your hand, add water and create a lather. Evaluate how quickly the lather forms and the quality of the lather. Then, spread the lather on your hands and arms, rinse with water, and check how it feels on your skin.

[0024] Evaluation criteria The skin cleansing agent obtained in Example 11 was used as the standard and one expert panelist performed the following evaluation. The skin cleansing agent in Example 11 was of a quality that was of no practical problem. - Smooth feel 〇: Equivalent. △: Slightly inferior. ×: Clearly inferior, not noticeable. ·Fast foaming property, foam quality ◎: Better. 〇: Equivalent. △: Slightly inferior. ×: Clearly inferior.

[0025] [Table 1]

[0026] [Table 2]

[0027] [Table 3]

[0028] [Table 4]

[0029] The skin cleansing agents obtained in the Examples of the present invention provided an excellent smooth feeling after washing. In contrast, the skin cleansing agents obtained in the Examples of the present invention provided an excellent smooth feeling after washing. In contrast, the skin cleansing agents obtained in the Examples of the present invention provided an excellent smooth feeling after washing. In contrast, the skin cleansing agents obtained in the Examples of the present invention provided an excellent smooth feeling after washing. In contrast, the skin cleansing agents obtained in the Examples of the present invention provided an excellent smooth feeling after washing. The skin cleansers obtained in Examples 4 to 6, which contain the component (B) in addition to the component (A), and in Example 7, which contains the component (C), provided an excellent smooth feeling after washing, and furthermore, were excellent in terms of quick lathering and foam quality. Similarly, Examples 8 to 20, which contain the components (A) to (C), were skin cleansers that were excellent in terms of smooth feeling, quick foaming, and foam quality. However, Example 16, in which the ratio of component (A) to the total amount of surfactants was 33.7%, was slightly inferior in foam quality, and Example 20, in which the ratio was 9.8%, was slightly inferior in terms of smooth feeling after washing.

[0030] Prescription examples are given below. Formulation example 1: Cream cleanser Display name Mass% Methyl gluceth-10 5 Beeswax 4 Lauric acid potassium 2 Potassium myristate 1.5 Potassium Palmitate 1.5 Cocoyl glycine K20 Oleoylglycine K5 Tocopherol 0.1 Sodium Methyl Cocoyl Taurate 1.3 Glycerin 30 Hydroxypropyl starch phosphate 1.5 EDTA-3Na 0.1 Sodium chloride 4 Citric Acid 2 Purified water remainder

[0031] Formulation example 2: Cream-type cleanser Display name Mass% Methyl gluceth-10 5 Beeswax 4 Lauric acid potassium 2 Potassium myristate 1.5 Myristic Acid 4 Potassium Palmitate 1.5 Cocoyl glycine K20 Oleoylglycine K5 Tocopherol 0.1 Potassium Cocoyl Glutamate 1.3 Glycerin 30 Hydroxypropyl starch phosphate 1.5 EDTA-3Na 0.1 Sodium chloride 1 Citric Acid 2 water residue

[0032] Formulation example 3: Powder cleanser Display name Mass% Sodium Lauroyl Glutamate 10 Mannitol 5 Cornstarch 4 Glucose 8 (Coconut / Palm / Sunflower) Sodium Glutamate 10 PEG-75 7 Oleoylglycine K11 Sodium Myristoyl Glutamate 5 Sodium Lauroyl Aspartate 5 Pullulan 5 Sodium Laurate 6 Sodium myristate 4 Sodium Stearoyl Glutamate 3 Rice starch 3 Behenyl Alcohol 3 Talc 6 Hydroxypropyl methylcellulose 2 Hydroxypropyl Starch Phosphate 2 Serine 1

[0033] Formulation example 4: Liquid type cleanser Display name Mass% Lauric acid potassium 3 Diglycerin 7 Glycosyl trehalose 7 Hydrogenated starch hydrolysate 4 Maltitol 4 Sodium Cocoamphoacetate 2 BG3 Glycerin 3 Sodium Cocoyl Alanine 2 Sodium Methyl Cocoyl Taurate 2 Oleoylglycine K3 Cellulose gum 1.5 Glycyrrhizic acid 2K 0.1 water residue

[0034] Formulation example 5: Cleansing agent in foam container Display name Mass% Lauric acid potassium 2 Oleoylglycine K2 BG10 Glycerin 10 Sorbitol 7 Sodium Cocoamphoacetate 2 Cocoyl glutamate K5 Methyl gluceth-10 3 Maltitol 3 Glycyrrhizic acid 2K 0.1 Betaine 0.1 water residue

[0035] Formulation example 6: Bar soap Display name Mass% Sodium Laurate 22 Sodium Palmitate 22 Sodium Myristate 19 Sodium oleoyl glycine 15 Myristic Acid Potassium 4 Lauric acid potassium 4 Sorbitol 2 Glycerin 2 Sodium Cocoyl Glycine 1 Bentonite 2 Cocamidopropyl Betaine 2 Sodium Cocoyl Glutamate 1 Palmitic acid K1 EDTA-4Na 0.1 Pentetic acid 5Na 0.1 fragrance 1 water residue

Claims

1. (A) containing oleoylglycine or a salt thereof, A skin cleansing agent comprising 20% ​​by mass or more of (A) based on the total amount of N-acylglycine or a salt thereof.

2. (B) N-acylamino acid or a salt thereof other than N-acylglycine or a salt thereof 2. The skin cleansing agent according to claim 1, further comprising:

3. (C) a fatty acid or a salt thereof 3. The skin cleansing agent according to claim 1, further comprising:

4. 3. The skin cleansing agent according to claim 1, wherein the amount of (A) is from 3% by mass to 33% by mass based on the total amount of surfactants.

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