JP2018012650A - Skin cleanser composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a skin cleansing composition excellent in foaming, elasticity of foam, storage stability at low temperature, and rinseability in cold water such as in winter. The present invention is characterized by containing the following components (A) to (D) and having a pH of 9.1 to 9.5. (A) Fatty acid consisting of lauric acid 59 to 79% by mass, myristic acid 15 to 33% by mass, palmitic acid 0 to 13% by mass (however, total 100% by mass); 2.0 to 5.5% by mass (B) At least one anionic surfactant selected from N-acyl-N-methylalanine salt and N-acylglutamate; 2.0 to 5.5 mass% (C) alkylsulfobetaine, alkylamidopropylbetaine, imidazole At least one amphoteric surfactant selected from nium betaine and alkylcarbobetaine; 0.1 to 5.0 mass% (D) polyhydric alcohol; 0.5 to 15.0 mass% [Selection diagram] None

Description

  The present invention relates to a skin cleansing composition.

  Conventionally, a skin cleanser is used as a foam-type cleanser by filling a former container such as a pump former or a squeeze foamer. Higher fatty acid salts, LES (sodium laureth sulfate), amino acid-based surfactants, etc. are known as the main cleaning components in such skin cleansing agents, but the feeling of use, fine foam quality, detergency etc. Higher fatty acid salts are often used from the viewpoint.

  However, when a higher fatty acid salt is used, there are a problem that the elasticity of the foam is inferior and a problem that the crystal is precipitated at a low temperature, resulting in poor stability. Further, when rinsing is performed in cold water such as in winter, the higher fatty acid salt has poor rinsing properties, so that there is a problem that it is not wet and is not refreshed after rinsing.

  Therefore, as a skin cleanser for improving such problems, a technique combining a higher fatty acid salt and a specific component (Patent Documents 1 and 2), an N-acylamino acid anionic surfactant and a specific component Combination techniques (Patent Documents 3 to 5) and the like have been proposed.

JP 2006-342293 A JP 2008-94903 A JP 2001-140000 A JP 2006-183039 A JP 2006-193549 A

  However, it was desired that the skin cleanser had good foaming, foam elasticity, storage stability at low temperatures, and good rinsing properties even in cold water such as in winter. What to do was not obtained.

  The present invention has been made in view of the circumstances as described above, and is a skin cleanser composition excellent in foaming, foam elasticity, storage stability at low temperatures, and rinse properties in cold water such as in winter. It is an issue to provide.

In order to solve the above problems, the skin cleansing composition of the present invention comprises the following components (A) to (D):
(A) Fatty acid consisting of 59 to 79% by mass of lauric acid, 15 to 33% by mass of myristic acid, and 0 to 13% by mass of palmitic acid (however, a total of 100% by mass);
(B) at least one anionic surfactant selected from N-acyl-N-methylalanine salts and N-acyl glutamates;
(C) at least one amphoteric surfactant selected from alkylsulfobetaines, alkylamidopropylbetaines, imidazolinium betaines, and alkylcarbobetaines;
(D) contains a polyhydric alcohol,
The content of the fatty acid (A) is 2.0 to 5.5% by mass, the content of the anionic surfactant (B) is 2.0 to 5.5% by mass, and the content of the amphoteric surfactant (C) is 0.1 to 5.0 mass%, the content of the polyhydric alcohol (D) is 0.5 to 15.0 mass%,
The pH is 9.1 to 9.5.

  According to the skin cleansing composition of the present invention, it is excellent in foaming, foam elasticity, storage stability at low temperatures, and rinsing properties in cold water as in winter.

  The present invention is described in detail below.

  The fatty acid (A) used in the skin cleansing composition of the present invention has a fatty acid composition of 59 to 79% by mass of lauric acid, 15 to 33% by mass of myristic acid, 0 to 13% by mass of palmitic acid (however, the total 100% by mass).

  This fatty acid (A) may be blended as a fatty acid during preparation of the skin cleansing composition, or may be blended as a fatty acid salt. Each constituent fatty acid or salt thereof may be blended simultaneously as a mixture or separately.

  The skin cleansing composition of the present invention has good foaming properties and can provide fine bubbles by adding the fatty acid (A).

  The content of the fatty acid (A) in the skin cleansing composition of the present invention is 2.0 to 5.5% by mass, preferably 2.1 to 5.2% by mass from the point of obtaining the effects of the present invention. is there.

  The anionic surfactant (B) used in the skin cleansing composition of the present invention is at least one selected from N-acyl-N-methylalanine salts and N-acyl glutamates.

  Among the anionic surfactants (B), examples of the N-acyl-N-methylalanine salt include those having an acyl group derived from a fatty acid having an average carbon number of 8 to 18. Specific examples include N-lauroyl-N-methyl-β-alanine salt, N-myristoyl-N-methyl-β-alanine salt, N-cocoyl-N-methyl-β-alanine salt, and the like. N-acyl-N-methylalanine salt may be used individually by 1 type, and may be used in combination of 2 or more type.

  Examples of the salt of N-acyl-N-methylalanine salt include alkali metal salts such as sodium and potassium, alkaline earth metal salts such as calcium and magnesium, substituted or unsubstituted amine salts, and the like. These salts may be used individually by 1 type, and may be used in combination of 2 or more type.

  Among the anionic surfactants (B), examples of the N-acyl glutamate include those having an acyl group derived from a fatty acid having an average carbon number of 8 to 18. Specifically, for example, N-lauroyl-L-glutamate, N-myristoyl-L-glutamate, N-stearoyl-L-glutamate, N-cocoyl-L-glutamate, N-palm fatty acid-L- Examples include glutamate. These may be used alone or in combination of two or more.

  Examples of the salt of N-acyl glutamate include alkali metal salts such as sodium and potassium, alkaline earth metal salts such as calcium and magnesium, substituted or unsubstituted amine salts, and the like. These salts may be used individually by 1 type, and may be used in combination of 2 or more type.

  The skin cleansing composition of the present invention has good foam elasticity by blending the anionic surfactant (B), and can obtain high-quality foam.

  The content of the anionic surfactant (B) in the skin cleansing composition of the present invention is 2.0 to 5.5% by mass, preferably 2.3 to 5.5% from the viewpoint of obtaining the effects of the present invention. % By mass.

  The amphoteric surfactant (C) used in the skin cleansing composition of the present invention is at least one selected from alkylsulfobetaines, alkylamidopropylbetaines, imidazolinium betaines, and alkylcarbobetaines.

  Among the amphoteric surfactants (C), examples of the alkyl sulfobetaines include alkyl sulfobetaines, alkylamido sulfobetaines, and alkylhydroxysulfobetaines. The average carbon number of the alkyl group is preferably 8 to 18, and more preferably. Is 8-14. Examples of the alkylsulfobetaine include coconut oil fatty acid dimethylsulfopropylbetaine, and examples of the alkylamidesulfobetaine include laurylamide sulfobetaine. Examples of the alkylhydroxysulfobetaine include lauryl hydroxysulfobetaine, cocoyl hydroxysulfobetaine, and laurylamidopropylhydroxysulfobetaine. Among these, alkylhydroxysulfobetaine is preferable. Alkylsulfobetaines may be used alone or in combination of two or more.

  Among the amphoteric surfactants (C), the alkylamidopropylbetaine preferably has an average carbon number of the alkyl group of 8 to 18, more preferably 8 to 14. Examples of the alkylamidopropyl betaine include lauric acid amidopropyl betaine, coconut oil fatty acid amidopropyl betaine, and palm kernel fatty acid amidopropyl betaine. Alkyl amide propyl betaine may be used individually by 1 type, and may be used in combination of 2 or more type.

  Among the amphoteric surfactants (C), imidazolinium betaines include, for example, 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine (sodium cocoamphoacetate), N-lauroyl-N′-carboxyl. Examples include methyl-N′-hydroxyethylethylenediamine sodium (sodium lauroamphoacetate) and the like. The imidazolinium betaine may be used alone or in combination of two or more.

  Among the amphoteric surfactants (C), alkylcarbobetaines preferably have an average carbon number of the alkyl group of 8 to 18. Examples of the alkylcarbobetaines include lauryl dimethylaminoacetic acid betaine, coconut oil alkyldimethylaminoacetic acid betaine, and stearyldimethylaminoacetic acid betaine. Alkyl carbobetaine may be used individually by 1 type, and may be used in combination of 2 or more type.

  Since the amphoteric surfactant (C) has excellent compatibility with the fatty acid (A), the anionic surfactant (B), and the polyhydric alcohol (D), the skin cleansing composition of the present invention has a transparent appearance. A skin cleanser composition can be obtained and the low-temperature stability can be improved.

  The content of the amphoteric surfactant (C) in the skin cleanser composition of the present invention is 0.1 to 5.0% by mass, preferably 0.1 to 4.5% from the viewpoint of obtaining the effects of the present invention. % By mass.

  Examples of the polyhydric alcohol (D) used in the skin cleansing composition of the present invention include glycerin, diglycerin, polyglycerin, ethylene glycol, diethylene glycol, polyethylene glycol, propylene glycol, dipropylene glycol, 1,3- Examples include butylene glycol, 1,2-pentanediol, 1,2-hexanediol, 1,2-octanediol, monosaccharide, and disaccharide. Examples of polyethylene glycol include polyethylene glycol 200 (PEG-4) having an average molecular weight of 190 to 210. A polyhydric alcohol (D) may be used individually by 1 type, and may be used in combination of 2 or more type.

  By blending the polyhydric alcohol (D), the skin cleanser composition of the present invention has good rinsing properties even in cold water such as in winter, and can improve storage stability at low temperatures.

  Content of the polyhydric alcohol (D) in the skin cleansing composition of this invention is 0.5-15.0 mass% from the point which acquires the effect of this invention, Preferably it is 5.0-10.0 mass. %.

  About the mixture ratio of said component (A)-(D) in the skin cleansing composition of this invention, the mass ratio of a fatty acid (A), an anionic surfactant (B), and an amphoteric surfactant (C). (A: B: C) is preferably 1: 0.5 to 1.3: 0.01 to 1.0. The mass ratio (D / (A + B + C)) of the polyhydric alcohol (D) to the total amount of the fatty acid (A), the anionic surfactant (B), and the amphoteric surfactant (C) is 0.05 to 2.0 is preferable. By blending at such a mass ratio, a skin cleansing composition having a desired effect can be obtained. Since the fatty acid (A) has good foamability, fine bubbles can be obtained, and the anionic surfactant (B) has good foam elasticity, so that high-quality foam can be obtained. The amphoteric surfactant (C) is excellent in compatibility with the fatty acid (A), the anionic surfactant (B), and the polyhydric alcohol (D), so that a transparent skin cleansing composition can be obtained. In addition, storage stability at low temperatures can be improved. By setting A: B: C to the above mass ratio, the foaming property and the elasticity of the foam are remarkably improved, so that it is possible to obtain good quality foam with good foaming and fine texture. By blending the polyhydric alcohol (D), the rinsing property is improved even in cold water such as in winter, and the storage stability at low temperatures can be improved, and D / (A + B + C) is the above mass ratio. Thus, it is possible to improve the rinsing property under cold water as in winter and the storage stability at low temperatures.

  Regarding the total amount (A + B) of the fatty acid (A) and the anionic surfactant (B) and the mass ratio (B / A) of the anionic surfactant (B) to the fatty acid (A), A + B is 4.6-9. 9 and B / A is preferably 0.5 to 1.3. By setting it within this range, the foamability and foam elasticity can be further improved.

  The mass ratio C / A of the amphoteric surfactant (C) to the fatty acid (A) is preferably 0.01 to 1.00.

  The skin cleansing composition of the present invention can contain other components other than the above components (A) to (D) as long as the effects of the present invention are not impaired. Examples of such other components include fatty acids other than the component (A), nonionic surfactants, anionic surfactants other than the component (B), cationic surfactants, and components other than the component (C). Amphoteric surfactants, water-soluble polymers (including cationic, nonionic and anionic), physiologically active ingredients, antioxidants, sequestering agents, preservatives, UV absorbers, perfumes, moisturizers, salts, Examples include solvents, neutralizing agents, insect repellents, enzymes, and the like.

  Examples of fatty acids include stearic acid and oleic acid. Examples of nonionic surfactants include an alkyl glucoside, a fatty acid alkanolamide, a polyoxyethylene fatty acid polyhydric alcohol ester, a fatty acid polyhydric alcohol ester, a polyoxyethylene alkyl ether, and the like. Activating agents include alkyl sulfates, alkyl ether sulfates, alkyl phosphates, alkyl ether phosphates, alkyl ether acetates, etc. Cationic surfactants include alkyl trimethyl ammonium salts, dialkyl dimethyl ammonium salts, alkyl benzyls. Examples of amphoteric surfactants such as dimethylammonium salts and alkylpyridinium salts include alkyldimethylamine oxide, and examples of water-soluble polymers include hydroxyethyl cellulose, hydroxypropyl cellulose. , Hydroxypropylmethylcellulose, dimethyldiallylammonium chloride / acrylamide copolymer, polyethylene glycol, highly polymerized polyethylene glycol, polyvinyl alcohol, polyglutamic acid, carboxyvinyl polymer, acrylic acid / alkyl methacrylate copolymer, alkyl acrylate copolymer As biologically active ingredients, natural plant extract ingredients, seaweed extract ingredients, herbal medicine ingredients, etc. that give some physiological activity to the skin when applied to the skin, antioxidants include tocopherols, dibutylhydroxytoluene As sequestering agents such as butylhydroxyanisole and gallic acid esters, 1-hydroxyethane-1,1-diphosphonic acid, 1-hydroxyethane-1,1-diphosphonic acid tetrasodium salt, Tylenediamine diacetic acid sodium salt, ethylenediaminetriacetic acid sodium salt, ethylenediaminetetraacetic acid sodium salt, polyphosphoric acid sodium salt, metaphosphoric acid sodium salt, gluconic acid, phosphoric acid, citric acid, ascorbic acid, succinic acid, ethylenediamine hydroxyethyl triacetic acid 3 Examples of preservatives such as sodium salts include paraoxybenzoic acid esters (methylparaben, ethylparaben, butylparaben), 1,2-alkanediol (carbon chain length 6-14) and derivatives thereof, phenoxyethanol, isopropylmethylphenol, sodium benzoate Salt, etc., UV absorbers such as benzotriazole, PABA, anthranilic acid, cinnamic acid, salicylic acid, benzophenone, triazine, etc., and perfumes include extract, essential oil, resin Perfumes containing perfume ingredients that are natural substances such as natural oils, resins, floral oils and combinations thereof, as moisturizers, mucopolysaccharides, hyaluronic acid, chondroitin sulfate, chitosan, sodium lactate, etc., as salts, citric acid, Organic acids such as malic acid, succinic acid, lactic acid, or salts of inorganic acids such as hydrochloric acid, sulfuric acid, nitric acid, carbonic acid, phosphoric acid, etc., such as ethanol, 1-propanol, 2-propanol, 1-butanol Alcohols; alkyl ethers such as diethylene glycol monomethyl ether and diethylene glycol dimethyl ether; neutralizers such as inorganic acids, organic acids, alkali metal salts and organic bases; insect repellents such as diethyltoluamide; , Protease, cellulase, amylase, lipase, mannanase, etc. .

  In the skin cleanser composition of the present invention, the above components (A) to (D) are mixed with a solid raw material, if necessary, and mixed and stirred as necessary. It can be obtained by adjusting the concentration and pH (9.1 to 9.5). Examples of the alkaline aqueous solution include aqueous solutions of alkaline agents such as potassium hydroxide, sodium hydroxide, monoethanolamine, diethanolamine, triethanolamine, isopropanolamine, aminomethylpropanol, and arginine.

  As the fatty acid (A), a fatty acid salt previously used may be used, or first, an alkaline aqueous solution is added to the fatty acid (A) to form a fatty acid salt, and then the above components (B) to (D) and water are used. Can also be obtained by adjusting the pH. Examples of the fatty acid salt include potassium salt, sodium salt, monoethanolamine salt, diethanolamine salt, triethanolamine salt, isopropanolamine salt, aminomethylpropanol salt, arginine salt and the like.

  The skin cleansing composition of the present invention has a pH of 9.1 to 9.5. The pH can be measured according to JIS Z8802. When the pH is within this range, storage stability at low temperatures and foam elasticity are good. When the pH is less than 9.1, the storage stability at low temperatures is lowered, and when the pH is more than 9.5, the elasticity of the foam is lowered.

  The skin cleansing composition of the present invention can be suitably used as, for example, hand soap, facial cleanser, cleansing, body shampoo, massage material, shampoo and the like.

  The skin cleanser composition of the present invention can be suitably used as a foam-type cleanser, particularly by filling a former container.

  As the former container, for example, a non-gas type discharge container that can be discharged in the form of foam by mixing the composition filled in the container and air and passing through the porous film can be used. . Specifically, a pump former, a squeeze former, etc. are mentioned, for example.

  One or a plurality of porous membranes in the former container are provided inside the container, and the number of pores of these porous membranes is not particularly limited, but considering the point of making a fine foam, 100 to 400 mesh Preferably, 200-300 mesh is more preferable.

  When the former container is used, the viscosity of the skin cleanser composition of the present invention is preferably 15 mPa · s or less at 25 ° C., more preferably 10 mPa · s or less. In addition, the measurement of a viscosity here can be performed by the method as described in the following Example.

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to examples. However, the present invention is not limited to these examples. In addition, all the compounding quantities in the Example and comparative example which are shown to Table 1-Table 5 show the mass%.
<Examples 1 to 25 and Comparative Examples 1 to 15>
The skin cleansing composition is prepared by mixing and stirring the components (A) to (D) and other raw materials in the composition ratios shown in Tables 1 to 5, and further mixing and stirring water and an aqueous potassium hydroxide solution as appropriate. Prepared.

  In Tables 1 to 5, the compounding amount of potassium hydroxide was expressed as an appropriate amount for adjusting to each pH value.

  The pH and viscosity of the skin cleanser composition were measured. In Tables 1 to 5, the pH is measured according to JIS Z8802, and the viscosity is measured using a BM viscometer (manufactured by Toki Sangyo Co., Ltd.), rotor No. 1, 60 rpm, 25 ° C. Performed under conditions.

  The obtained skin cleansing composition was filled in 200 mL of a 200 mL capacity pump former type container (using two 200 mesh), and the following evaluation was performed.

(1) Foaming at room temperature 20 panelists perform normal squeeze operations at room temperature, discharge the contents, pick them up in their hands, and rub the palms of both hands. Sensory evaluation and scoring. After scoring, ◎ if the average score of the entire panel is 3.5 or more, ○ if 2.5-3.4, △ if 1.5-2.4, × if 1.4 or less It was.
Evaluation criteria 4 points: very good foaming 3 points: good foaming 2 points: slightly good foaming 1 point: foaming is not good or bad

(2) Elasticity of bubbles at room temperature 20 panelists perform normal squeeze operations at room temperature, discharge the contents, take them in their hands, and rub them with the feel of the bubbles when rubbing the palms of both hands. Sensory evaluation was performed at room temperature according to the following evaluation criteria, and a score was given. After scoring, ◎ if the average score of the entire panel is 3.5 or more, ○ if 2.5-3.4, △ if 1.5-2.4, × if 1.4 or less It was.
Evaluation criteria 4 points: foam elasticity is very high 3 points: foam elasticity is 2 points: foam elasticity is slightly 1 point: foam has little or no elasticity

(3) Rinse in cold water during use Each of the 20 panelists performed normal squeeze operations at room temperature, discharged the contents, rubbed the palms of both hands, and then rinsed with 10 ° C water for 7 seconds. . The rinsing property of the foam was sensory-evaluated at room temperature according to the following evaluation criteria and scored. After scoring, ◎ if the average score of the entire panel is 3.5 or more, ○ if 2.5-3.4, △ if 1.5-2.4, × if 1.4 or less It was.
Evaluation criteria 4 points: Very refreshing feeling after rinsing 3 points: Refreshing feeling after rinsing 2 points: Feeling refreshed slightly after rinsing 1 point: Little or no refreshing feeling after rinsing

(4) Appearance, storage stability at low temperature Each 50 mL transparent sample tube was filled with the skin cleanser composition and stored at room temperature (25 ° C), 0 ° C, and -5 ° C. The appearance after one month was evaluated according to the following criteria.
Evaluation criteria ◎: Appearance is transparent and no precipitate ○: Slightly turbid but no precipitate △: Slightly cloudy, with some precipitate ×: White turbidity or many precipitates are observed

  The above evaluation results are shown in Tables 1 to 5. In the table, Na is sodium, K is potassium, TEA is triethanolamine, EDTA-4Na is ethylenediaminetetraacetic acid tetrasodium salt, and PEG-4 is polyethylene glycol.

表１より明らかなように、成分（Ａ）〜（Ｄ）を、特定範囲の量で配合し、かつｐＨを９．１〜９．５とした実施例１〜２５の皮膚洗浄剤組成物は、泡立ち、泡の弾力性、低温時の保存安定性、冬場のような冷水下でのすすぎ性に優れ、比較例１〜１５の組成物に比べて優れた性能を見出した。

As is clear from Table 1, the skin cleansing compositions of Examples 1 to 25 containing components (A) to (D) in an amount within a specific range and having a pH of 9.1 to 9.5 They were found to be excellent in foaming, foam elasticity, storage stability at low temperatures, and rinseability in cold water such as in winter, and superior in performance to the compositions of Comparative Examples 1-15.

  When N-cocoylglycine K salt (Comparative Example 11) was used in place of component (B), the storage stability at low temperatures was poor, and N-acyl-N-methylalanine salt, N- It was confirmed that the skin cleanser compositions of Examples using acyl glutamate had good storage stability at low temperatures.

  When N-lauroylalanine Na salt (Comparative Example 12) was used instead of component (B), the storage stability at low temperatures was poor, and N-acyl-N-methylalanine salt was used as component (B). It was confirmed that the skin cleanser compositions of the examples had good storage stability at low temperatures.

  When the polyhydric alcohol of the component (D) is more than 15.0% by mass (Comparative Example 13), the foam quality (foam elasticity) and the rinsing property under cold water become poor, and the polyhydric alcohol (D) It was confirmed that the skin cleanser compositions of Examples having a content of 15.0% by mass or less have good foam elasticity and rinsing properties under cold water such as in winter.

  When the pH of the skin cleanser composition is less than 9.1 (Comparative Example 14), the storage stability at low temperatures becomes poor, and when the pH of the skin cleanser composition exceeds 9.5 (Comparative Example 15) The foam quality (bubble elasticity) was poor.

<Prescription example>
A preferred formulation example of the skin cleansing composition of the present invention is shown below.

The following raw materials were used for the skin cleansing composition.
Fatty acid (A1)
Lauric acid, manufactured by Miyoshi Oil & Fats Co., Ltd. “Lauric acid 98”
Fatty acid (A2)
Myristic acid, “Myristic acid 98” manufactured by Miyoshi Oil & Fats Co., Ltd.
Fatty acid (A3)
Palmitic acid, manufactured by Miyoshi Oil & Fats Co., Ltd. “Palmitic acid 98”
Anionic surfactant (B1)
N-lauroyl-N-methyl-β-alanine Na salt, “Enajol L-30AN” manufactured by Lion Corporation
Anionic surfactant (B2)
N-cocoyl-L-glutamic acid TEA salt, “Amisoft CT-12 S” manufactured by Ajinomoto Co., Inc.
Anionic surfactant (B3)
N-cocoyl-L-glutamic acid Na salt, “Amino Surfact AC DS-L” manufactured by Asahi Kasei Corporation
Amphoteric surfactant (C1)
Laurylhydroxysulfobetaine, “Amholex LSB” manufactured by Miyoshi Oil & Fats Co., Ltd.
Amphoteric surfactant (C2)
Laminic acid amidopropyl betaine, “Amholex LB-2” manufactured by Miyoshi Oil & Fats
Polyhydric alcohol (D1)
"Concentrated glycerin for cosmetics" manufactured by Miyoshi Oil & Fats Co., Ltd.
Polyhydric alcohol (D2)
Dipropylene glycol (DPG), “DPG-FC” manufactured by Asahi Glass Co., Ltd.
Polyhydric alcohol (D3)
Sorbitol, Kao Corporation “Sorbitol Kao”
Polyhydric alcohol (D4)
1,3-butylene glycol (1,3-BG), “1,3-butylene glycol” manufactured by Daicel Corporation
Polyhydric alcohol (D5)
Diglycerin, “Diglycerin 801” manufactured by Sakamoto Pharmaceutical Co., Ltd.
Water-soluble polymer 1
Dimethyldiallylammonium chloride / acrylamide copolymer, “Marcote 550” manufactured by Nippon Lubrizol Co., Ltd.
Water-soluble polymer 2
O- [2-hydroxy-3- (trimethylammonio) propyl] hydroxyethyl cellulose chloride, “Katinal HC-100” manufactured by Toho Chemical Industry Co., Ltd.

  Hereinafter, the raw material in a prescription is represented by mass% (effective part).

(Prescription example 1: Hand soap)
Lauric acid (A1) 2.50% by mass
Myristic acid (A2) 1.10% by mass
Palmitic acid (A3) 0.20% by mass
N-lauroyl-N-methyl-β-alanine Na salt (B1) 2.30% by mass
Laurylhydroxysulfobetaine (C1) 0.60% by mass
Glycerin (D1) 1.00% by mass
DPG (D2) 4.70 mass%
Sorbitol (D3) 0.40% by mass
Dimethyldiallylammonium chloride / acrylamide copolymer (water-soluble polymer 1)
0.03 mass%
Isopropyl methylphenol 0.05% by mass
Perfume 0.03% by mass
Potassium hydroxide pH adjustment amount Purified water Residue (100% by mass in total)

  Components (A) to (D), other components, and water are mixed, heated and stirred, adjusted to pH 9.2 with potassium hydroxide, and then filled into a foam container to prepare a skin cleanser composition (hand Soap) was prepared.

  This hand soap was excellent in foaming, foam elasticity, storage stability at low temperatures, and rinsing properties in cold water such as in winter.

(Formulation Example 2: Face wash)
Lauric acid K salt * (A1) 4.00% by mass
Myristic acid (A2) 1.00% by mass
Palmitic acid (A3) 0.07% by mass
N-cocoyl-L-glutamic acid TEA salt (B2) 0.30% by mass
N-cocoyl-L-glutamic acid Na salt (B3) 3.10% by mass
Lauric acid amidopropyl betaine (C2) 3.00 mass%
1,3-BG (D4) 9.00 mass%
Diglycerin (D5) 0.50% by mass
O- [2-hydroxy-3- (trimethylammonio) propyl] hydroxyethyl cellulose (water-soluble polymer 2) 0.10% by mass
Fragrance 0.05% by mass
Potassium hydroxide pH adjustment amount Purified water Residue (100% by mass in total)
* Lauric acid K salt: prepared by neutralizing lauric acid 98 manufactured by Miyoshi Oil & Fats Co., Ltd. with potassium hydroxide

  Components (A) to (D), other components, and water are mixed, heated and stirred, adjusted to pH 9.5 with potassium hydroxide, and then filled into a foam container to prepare a skin cleanser composition (face wash Preparation).

  This face wash was excellent in foaming, foam elasticity, storage stability at low temperatures, and rinsing properties in cold water as in winter.

Claims (3)

The following components (A) to (D):
(A) Fatty acid consisting of 59 to 79% by mass of lauric acid, 15 to 33% by mass of myristic acid, and 0 to 13% by mass of palmitic acid (however, a total of 100% by mass);
(B) at least one anionic surfactant selected from N-acyl-N-methylalanine salts and N-acyl glutamates;
(C) at least one amphoteric surfactant selected from alkylsulfobetaines, alkylamidopropylbetaines, imidazolinium betaines, and alkylcarbobetaines;
(D) contains a polyhydric alcohol,
The content of the fatty acid (A) is 2.0 to 5.5% by mass, the content of the anionic surfactant (B) is 2.0 to 5.5% by mass, and the content of the amphoteric surfactant (C) is 0.1 to 5.0 mass%, the content of the polyhydric alcohol (D) is 0.5 to 15.0 mass%,
A skin cleanser composition having a pH of 9.1 to 9.5. The mass ratio (A: B: C) of the fatty acid (A), the anionic surfactant (B), and the amphoteric surfactant (C) is 1: 0.5 to 1.3: 0.01 to 1. 0,
The mass ratio (D / (A + B + C)) of the polyhydric alcohol (D) to the total amount of the fatty acid (A), the anionic surfactant (B), and the amphoteric surfactant (C) is 0.05-2. The skin cleanser composition according to claim 1, which is 0. The skin cleansing composition according to claim 1 or 2, which is filled in a former container.