JPWO2019230083A1 - Skin cleanser composition - Google Patents

Abstract

A fatty acid containing (A) stearic acid in an amount of 0.5% by mass or more and 5% by mass or less based on the skin cleansing composition, (B) hydroxypropyl starch phosphoric acid, and (C) a nonionic surfactant. D) A skin cleanser composition containing a basic compound and having a mass ratio (A / B) of the content of the component (A) to the content of the component (B) of 20 or more and 80 or less. It is a thing.

Description

The present invention relates to a skin cleansing composition.

Conventionally, as a skin cleansing composition, a long-chain fatty acid having a high melting point such as 18 carbon atoms is used, and the blending ratio and blending amount of fatty acids having 12 to 18 carbon atoms are devised, or a polymer or the like is used. It is known to stabilize by doing so.
A skin cleansing composition containing a polymer for stabilizing a lower fatty acid having 8 or more and 13 or less carbon atoms has been proposed (see, for example, Patent Document 1).
However, in such a skin cleansing composition, the amount of foam in hard water is small, a refreshing feeling during use in hard water, a moist feeling after use in hard water, and a dry skin after using hard water. There was a problem that it was difficult to achieve both a lack of tension and appearance stability.

Therefore, a large amount of foam in hard water can be obtained, and a refreshing feeling during use in hard water, a moist feeling after use in hard water, a lack of firmness of the skin after drying after using hard water, and an appearance. At present, there is a strong demand for the development of a skin cleansing composition having excellent stability.

Japanese Unexamined Patent Publication No. 2013-67627

An object of the present invention is to solve the above-mentioned problems in the past and to achieve the following object. That is, in the present invention, a large amount of foam can be obtained in hard water, and a refreshing feeling during use in hard water, a moist feeling after use in hard water, and a feeling of firmness of the skin after drying after using hard water can be obtained. It is an object of the present invention to provide a skin cleansing composition which is excellent in water resistance and appearance stability.

As a result of diligent studies by the present inventors in order to solve the above problems, (A) a fatty acid containing 0.5% by mass or more and 5% by mass or less of stearic acid, (B) hydroxypropyl starch phosphoric acid, and (C). ) A nonionic surfactant and (D) a basic compound are blended, and the mass ratio (A / B) of the content of the component (A) to the content of the component (B) is 20. When the value is 80 or less, these components work synergistically to obtain a large amount of foam in hard water, resulting in a refreshing feeling during use in hard water, a moist feeling after use in hard water, and after using hard water. It was found that the skin does not feel taut after drying and is excellent in appearance stability.

The present invention is based on the above-mentioned findings by the present inventors, and the means for solving the above-mentioned problems are as follows.
<1> (A) A fatty acid containing 0.5% by mass or more and 5% by mass or less of stearic acid with respect to the skin cleansing composition.
(B) Hydroxypropyl starch phosphoric acid and
(C) Nonionic surfactant and
(D) Containing with a basic compound,
The skin cleansing composition is characterized in that the mass ratio (A / B) of the content of the component (A) to the content of the component (B) is 20 or more and 80 or less.
<2> The skin cleansing composition according to <1>, which further contains (E) a chelating agent.
<3> The skin cleansing composition according to any one of <1> to <2>, wherein the pH of the 20% by mass aqueous solution of the skin cleansing composition is 8.5 or more and 9.8 or less at 30 ° C. Is.
<4> The skin cleansing composition according to any one of <1> to <3>, wherein the component (A) contains stearic acid, lauric acid, myristic acid, and palmitic acid.
<5> The skin cleansing composition according to any one of <1> to <4>, wherein the component (C) is at least one selected from an alkyl glycoside and an alkyl glucamide.

According to the present invention, the above-mentioned problems in the prior art can be solved, the above-mentioned object can be achieved, a large amount of bubbles can be obtained in hard water, a refreshing feeling during use in hard water, and moistness after use in hard water. It is possible to provide a skin cleansing composition having excellent feeling, no feeling of tension of the skin after drying after using hard water, and appearance stability.

(Skin cleansing composition)
The skin cleansing composition of the present invention comprises (A) a fatty acid containing 0.5% by mass or more and 5% by mass or less of stearic acid with respect to the skin cleansing agent composition, (B) hydroxypropyl starch phosphoric acid, and (C). ) A nonionic surfactant and (D) a basic compound are contained, and (E) a chelating agent is preferably further contained, and if necessary, other components are contained.

<Fatty acid containing (A) stearic acid in an amount of 0.5% by mass or more and 5% by mass or less based on the skin cleansing composition>
The fatty acid of the component (A) contains stearic acid in an amount of 0.5% by mass or more and 5% by mass or less based on the skin cleansing composition.
The fatty acid of the component (A) is contained in order to improve the amount of bubbles in hard water.

The fatty acid containing the stearic acid component (A) in an amount of 0.5% by mass or more and 5% by mass or less based on the skin detergent composition is not particularly limited and may be appropriately selected depending on the intended purpose. Examples include coconut oil fatty acids and mixtures of stearic acid with other fatty acids.
Examples of the other fatty acids include lauric acid, myristic acid, palmitic acid, capric acid, oleic acid and the like. These may be used alone or in combination of two or more.
Among these, the fatty acid of the component (A) contains (a1) stearic acid, (a2) lauric acid, (a3) myristic acid, and (a4) palmitic acid in terms of the amount of bubbles in hard water. Is preferable.
The fatty acid of the component (A) can be neutralized with the basic compound of the component (D) to form a salt.

The fatty acid of the component (A) is not particularly limited and may be appropriately selected depending on the intended purpose, and a commercially available product may be used.
Examples of commercially available stearic acid products include stearic acid (trade name: NAA-180, manufactured by NOF CORPORATION).
Examples of commercially available products of the other fatty acids include lauric acid (trade name: NAA-122, manufactured by NOF CORPORATION), lauric acid (trade name: LAURIC ACID (POFAC 1299L)), and SOUTHERN ACIDS (M) BHD. (Manufactured by), lauric acid (trade name: LAURIC ACID 99% (MMFA-1299), manufactured by PT MUSIM MAS), myristic acid (trade name: NAA-142, manufactured by NOF CORPORATION), myristic acid (manufactured by NOF CORPORATION) Product name: KORTACID 1499, manufactured by Pacific Oleo), myristic acid (trade name: MYRYSTIC ACID 99%, manufactured by PT MUSIM MAS), palmitic acid (trade name: NAA-160, manufactured by NOF Corporation), Examples thereof include palmitic acid (trade name: PALMITIC ACID 98%, manufactured by BEADS). These may be used alone or in combination of two or more.

The fatty acid content of the component (A) is 30% by mass with respect to the total amount of the skin cleansing composition from the viewpoints of the amount of foam in hard water, the refreshing feeling during use in hard water, and the appearance stability. More than 40% by mass is preferable, and 32% by mass or more and 38% by mass or less is more preferable. When the fatty acid content of the component (A) is 30% by mass or more, the amount of bubbles in hard water, the refreshing feeling during use in hard water, and the appearance stability are good. When the content of the fatty acid of the component (A) is 40% by mass or less, the refreshing feeling during use in hard water and the lack of firmness of the skin after drying after using hard water are good. ..

The content of stearic acid of the component (a1) is 0.5% by mass or more and 5% by mass or less with respect to the total amount of the skin cleansing composition from the viewpoint of the amount of foam in hard water and the appearance stability. Yes, it is preferably 2% by mass or more and 4% by mass or less. If the content of stearic acid of the component (a1) is less than 0.5% by mass, the amount of bubbles in hard water becomes insufficient. If the content of stearic acid in the component (a1) exceeds 5% by mass, the appearance stability becomes insufficient.

The content of lauric acid as the component (a2) is 0.5% by mass or more and 10% by mass or less with respect to the total amount of the skin cleansing composition from the viewpoint of the amount of foam in hard water and the appearance stability. Preferably, it is 2% by mass or more and 6% by mass or less, more preferably. When the content of lauric acid of the component (a2) is 0.5% by mass or more, the amount of bubbles in hard water is good. When the content of lauric acid of the component (a2) is 10% by mass or less, the appearance stability is good.

The content of myristic acid of the component (a3) is preferably 10% by mass or more and 40% by mass or less with respect to the total amount of the skin cleansing composition from the viewpoint of the amount of bubbles in hard water and the appearance stability. More preferably, it is 15% by mass or more and 30% by mass or less. When the content of myristic acid of the component (a3) is 10% by mass or more, the amount of bubbles in hard water is good. When the content of myristic acid of the component (a3) is 40% by mass or less, the appearance stability is good.

The content of palmitic acid as the component (a4) is 0.5% by mass or more and 5% by mass or less with respect to the total amount of the skin cleansing composition from the viewpoint of the amount of foam in hard water and the appearance stability. Preferably, it is 1% by mass or more and 4% by mass or less. When the content of palmitic acid of the component (a4) is 0.5% by mass or more, the amount of bubbles in hard water is good. When the content of palmitic acid of the component (a4) is 5% by mass or less, the appearance stability is good.

<(B) Hydroxypropyl starch phosphoric acid>
The hydroxypropylstarch phosphoric acid of the component (B) is contained in order to improve the moist feeling after use in hard water and the appearance stability.

As the hydroxypropyl starch phosphoric acid of the component (B), a commercially available product may be used. Examples of the commercially available product include hydroxypropyl starch phosphoric acid (trade name: Structure XL, manufactured by AkzoNobel) and the like.

The content of the component (B) is 0.4 with respect to the total amount of the skin cleansing composition from the viewpoints of a refreshing feeling during use in hard water, a moist feeling after use in hard water, and appearance stability. It is preferably mass% or more and 2 mass% or less, and more preferably 0.5 mass% or more and 1.5 mass% or less. When the content of the component (B) is 0.4% by mass or more, the moist feeling after use in hard water and the appearance stability are good. When the content of the component (B) is 2% by mass or less, the refreshing feeling during use in hard water and the appearance stability are good.

[Mass ratio (A / B)]
The mass ratio (A / B) of the content of the component (A) to the content of the component (B) is a point of a refreshing feeling during use in hard water and a moist feeling after use in hard water. Therefore, it is 20 or more and 80 or less, preferably 30 or more and 51 or less. When the mass ratio (A / B) is less than 20, the refreshing feeling during use in hard water and the moist feeling after use in hard water are insufficient. When the mass ratio (A / B) exceeds 80, the refreshing feeling during use in hard water and the moist feeling after use in hard water become insufficient.

<(C) Nonionic surfactant>
The nonionic surfactant of the component (C) is contained in order to improve the lack of tension of the skin after drying after using hard water.

The nonionic surfactant of the component (C) is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include alkyl glycosides and alkyl glucamides.
Examples of the alkyl glycoside include decyl glucoside and alkyl glycosides having 8 or more and 16 or less carbon atoms.
Examples of the alkyl glucamamide include (capryloyl / capryl methyl glucamide), (lauroyl / myristoyl / methyl glucamide), and (cocoyl methyl glucamide). These may be used alone or in combination of two or more.
Among these, decyl glucoside, (capryloyl / capryl methyl glucamide) and (lauroyl / myristyl / methyl glucamide) are used in combination because of the lack of firmness of the skin after drying after using hard water. preferable.

The nonionic surfactant of the component (C) is not particularly limited and may be appropriately selected depending on the intended purpose, and a commercially available product may be used.
Examples of commercially available products of the alkyl glucoside include coconut oil alkyl glucoside (trade name: Plantacare 818UP, manufactured by Cognis), lauryl glucoside (trade name: Plantacare 1200UP, manufactured by Cognis), and decyl glucoside (trade name: Planta). Care 2000UP, manufactured by Cognis Co., Ltd.) and the like.
Examples of commercially available products of the alkyl glucamide include (caprilol / capryl methyl glucamide) (trade name: Glucotein Clear, manufactured by Clariant), (lauroyl / myristoyl / methyl glucamide) (trade name: glucotein flex). , Clariant), a mixture of (Capriloyl / Capril Methyl Glucamide) and (Lauroyl / Millistyl / Methyl Glucamide) (trade name: Glucotein Plus, Clariant) and the like.

The content of the component (C) is 0.1% by mass with respect to the total amount of the skin detergent composition from the viewpoint of lack of tension of the skin after drying after using hard water and appearance stability. % Or more and 10% by mass or less are preferable, and 0.5% by mass or more and 5% by mass or less are more preferable. When the content of the component (C) is 0.1% by mass or more, the skin does not feel taut after drying after using hard water. When the content of the component (C) is 10% by mass or less, the appearance stability is good.

<(D) Basic compound>
The basic compound of the component (D) is contained in order to improve the amount of bubbles in hard water and the appearance stability.

The basic compound of the component (D) is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include alkali metal hydroxides, amines and amino acid salts.
Examples of the alkali metal hydroxide include sodium hydroxide, potassium hydroxide and the like.
Examples of the amine include ammonium monoethanolamine, diethanolamine, triethanolamine, 2-amino-2-methylpropanol, 2-amino-2-methylpropanediol and the like.
Examples of the amino acid salt include a lysine salt and an arginine salt.
Among these, sodium hydroxide and potassium hydroxide are preferable from the viewpoint of the amount of bubbles in hard water.
The basic compound of the component (D) can neutralize with the fatty acid of the component (A) to form a salt.

The basic compound of the component (D) is not particularly limited and may be appropriately selected depending on the intended purpose, and a commercially available product may be used. Examples of the commercially available product include potassium hydroxide (trade name: Potassium Hydroxide-solid, manufactured by UNID KOREA).

The content of the component (D) includes the amount of bubbles in hard water, a refreshing feeling during use in hard water, a moist feeling after use in hard water, and appearance stability. The amount of the fatty acid that can be stoichiometrically neutralized by 90% by mass or more and 98% by mass or less is preferable, and the fatty acid of the component (A) is stoichiometrically neutralized by 92% by mass or more and 95% by mass or less. The amount that can be produced is more preferable. When the content of the component (D) is an amount that can chemically neutralize the fatty acid of the component (A) by 90% by mass or more, the amount of bubbles in hard water and the use in hard water. The inside is refreshing, the moist feeling after use in hard water, and the appearance stability are good. When the content of the component (D) is an amount that can chemically neutralize the fatty acid of the component (A) by 98% by mass or less, the appearance stability is good.
The content of the component (D) is the composition of the skin cleanser from the viewpoints of the amount of foam in hard water, the refreshing feeling during use in hard water, the moist feeling after use in hard water, and the appearance stability. It is preferably 7.1% by mass or more and 8.9% by mass or less, and more preferably 7.2% by mass or more and 7.7% by mass or less with respect to the total amount of the substance. When the content of the component (D) is 7.1% by mass or more, the amount of bubbles in hard water, the refreshing feeling during use in hard water, the moist feeling after use in hard water, and the appearance stability are obtained. It is good. When the content of the component (D) is 8.9% by mass or less, the appearance stability is good.

<(E) Chelating agent>
The chelating agent of the component (E) is preferably contained in order to improve the amount of bubbles in hard water and the appearance stability.

The chelating agent for the component (E) is not particularly limited and may be appropriately selected depending on the intended purpose. For example, edetic acid (EDTA), edetate, citric acid, citrate, phytic acid, phytic acid. Examples thereof include acid salt, polyphosphate, polyphosphate, metaphosphate, metaphosphate, tartaric acid, and tartrate.
Examples of the edetate include EDTA-2Na and the like.
Among these, edetic acid and EDTA-2Na are preferable from the viewpoint of the amount of bubbles in hard water and the appearance stability.

The chelating agent for the component (E) is not particularly limited and may be appropriately selected depending on the intended purpose, and a commercially available product may be used. Examples of the commercially available product include EDTA-2Na (trade name: VERSENE NA2 Crystals, manufactured by DOWN Chemical), EDTA-2Na (trade name: Dissolvin NA-2, manufactured by AkzoNobel) and the like.

The content of the component (E) is preferably 0.1% by mass or more and 1.0% by mass or less with respect to the total amount of the skin cleansing composition from the viewpoint of the amount of bubbles in hard water and the appearance stability. , 0.2% by mass or more and 0.5% by mass or less is more preferable. When the content of the component (E) is 0.1% by mass or more, the appearance stability is more excellent. When the content of the component (E) is 0.2% by mass or more, the amount of bubbles in hard water and the appearance stability are more excellent. When the content of the component (E) is 1.0% by mass or less, the appearance stability is more excellent.

<Other ingredients>
In addition to the above-mentioned components (A) to (E), the skin cleansing composition of the present invention includes other components usually used in the skin cleansing composition, if necessary, as long as the effects of the present invention are not impaired. Ingredients can be blended.
The other components are not particularly limited and may be appropriately selected depending on the intended purpose. For example, water, sodium pyrosulfite, sodium sulfite oil, silicones, alcohols such as lower or higher alcohols, glycerin and the like. Polyhydric alcohols, lanolin derivatives, protein derivatives, acrylic resin dispersions, chemicals such as vitamins, bactericides, preservatives, pH adjusters such as citric acid and hydrochloric acid, antioxidants, metal sequestering agents, UV absorbers, animals and plants Examples thereof include extracts or derivatives thereof, pigments, fragrances, pigments, inorganic powders, clay minerals, water-insoluble polymer compound powders such as nylon and polyethylene. These may be used alone or in combination of two or more.
The content of the other components is not particularly limited and may be appropriately selected depending on the intended purpose as long as the effects of the present invention are not impaired.

−pH−
The pH of the 20% by mass aqueous solution of the skin cleansing composition is preferably 8.5 or more and 9.8 or less, preferably 8.7 or more and 9 or more at 30 ° C. from the viewpoint of the amount of bubbles in hard water and appearance stability. It is more preferably 9.8 or less, and particularly preferably 9.1 or more and 9.6 or less. If the pH is less than 8.5, the amount of bubbles in hard water and the appearance stability may be insufficient. If the pH exceeds 9.8, the appearance stability may be insufficient.
The pH is adjusted, for example, by adding water so that the concentration of the skin cleansing composition is 20% by mass, and then the pH is adjusted in accordance with the pH measurement method of the General Test Method for Non-pharmaceutical Products Raw Materials 2006. It can be measured at 30 ° C. using a meter (device name: HM-30R, manufactured by DKK-TOA CORPORATION).

-Dosage form-
The dosage form of the skin cleansing composition is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include paste, liquid and gel.

-Viscosity-
The viscosity of the skin cleansing composition is not particularly limited and may be appropriately selected depending on the intended purpose. However, the viscosity at 25 ° C. is that it does not easily spill when picked up, is easily applied to the skin, and is easily spread. However, it is preferably 2,000 mPa · s or more and 200,000 mPa · s or less, more preferably 20,000 mPa · s or more and 100,000 mPa · s or less, and particularly preferably 30,000 mPa · s or more and 80,000 mPa · s or less.
The viscosity can be measured, for example, using a BH type viscometer (manufactured by Tokyo Keiki Co., Ltd.) under the conditions of No. 7 rotor, 30 ° C., 20 rpm, 60 seconds and the like.

-Container-
The skin cleansing composition is not particularly limited, and can be produced according to a conventional method of various dosage forms.
Examples of the container for the skin cleaning agent composition include tubes such as polyethylene tubes, polyethylene laminated tubes, aluminum laminated tubes, EVAL tubes, aluminum tubes, and glass-deposited plastic tubes, as well as mechanical or differential pressure dispenser containers and squeeze containers. , Laminated film container, dropper container, stick container, bottle container and the like.
The laminated film container usually has two or more layers, and the material of the laminate includes, for example, polyethylene, polyethylene terephthalate, polyester, biaxially stretched polypropylene, unstretched polypropylene, polyacrylonitrile, and ethylene-vinyl acetate co-weight. Examples include synthetic resin such as coalescence, paper, and aluminum-deposited plastic. The laminated film container is generally of 2 to 5 layers in consideration of strength, flexibility, weather resistance and the like.
Examples of the material of the bottle container include polyethylene, polypropylene, polyethylene terephthalate, polystyrene, polyvinyl chloride, ethylene-vinyl alcohol copolymer resin, acrylonitrile-styrene copolymer resin, ABS resin, polyamide, glass and the like. Can be used in a single layer or in combination of two or more layers.

-Manufacturing method-
The method for producing the skin cleansing composition of the present invention is not particularly limited and may be appropriately selected depending on the intended purpose. For example, the component (A), the component (B), and the component (C). Further, if necessary, the component (E) is put into a heated (for example, 80 ° C.) container and uniformly dissolved, and then the component (D) and other components are uniformly mixed. It can then be produced by cooling the mixture (eg, cooling rate: 0.5 ° C./min, up to 40 ° C.).
The device for preparing the skin cleansing composition is not particularly limited and may be appropriately selected depending on the intended purpose. For example, a paddle type stirrer or the like, a plurality of stirring blades (paddle, propeller, etc.) capable of being totally mixed with shearing. Examples include a stirrer equipped with a turbine, a dispenser, etc.). The components (A) to (E) and the other components may be used alone in preparing the skin cleansing composition, or a mixture containing two or more kinds of components. You may use it in the state of.

-Use-
The skin cleansing composition of the present invention can obtain a large amount of foam in hard water, and has a refreshing feeling during use in hard water, a moist feeling after use in hard water, and a dry skin after using hard water. It can be suitably used for, for example, body soap, hand soap, foam hand soap, liquid hand soap, detergent, kitchen hand soap, etc. because it does not have a tight feeling and is excellent in appearance stability.

Hereinafter, the present invention will be specifically described with reference to examples of the present invention, but the present invention is not limited to these examples. The content of each component described in Examples and Comparative Examples is shown in% by mass and is a value converted to pure content.

(Examples 1 to 27 and Comparative Examples 1 to 9)
The skin cleansing compositions of Examples 1 to 27 and Comparative Examples 1 to 9 having the compositions shown in Tables 1 to 6 below were prepared by a conventional method.
Specifically, first, the component (A), the component (B), the component (C), and purified water, and if necessary, the component (E) are put into a container preheated to 80 ° C. and paddle type. It was uniformly dissolved using a stirrer. At this time, the amount of purified water was adjusted so that the amount of the dissolved mixture was 90% by mass of the total amount of the skin cleansing composition. Next, in Examples and Comparative Examples other than Comparative Example 9, the component (D) was added so that the pH of the 20% by mass aqueous solution of the mixture was 8.9 or more and 9.8 or less, and sodium pyrosulfite was further added. Glycerin and propylene glycol were added and mixed uniformly. The mixture was then cooled to 40 ° C. at a cooling rate of 0.5 ° C./min. Then, a fragrance was added, and purified water was further added so as to have a total content of 100% by mass and mixed to prepare skin cleansing compositions of Examples 1 to 27 and Comparative Examples 1 to 9.
Comparative Example 9 was prepared in the same manner as in other Examples and Comparative Examples except that the component (D) was not contained and the pH of the 20% by mass aqueous solution of the mixture was set to 6.0.
The pH was adjusted by adding water so that the concentration of the obtained skin cleansing composition was 20% by mass, and then the pH was adjusted in accordance with the pH measurement method of the 2006 General Test Method for Non-pharmaceutical Products. It was measured at 30 ° C. using a pH meter (device name: HM-30R, manufactured by DKK-TOA CORPORATION).

Next, for each of the obtained skin cleansing compositions, "amount of foam in hard water", "refreshing feeling during use in hard water", "moist feeling after use in hard water" as follows. , "The skin does not feel taut after drying after using hard water", and "Appearance stability" were evaluated. The results are shown in Tables 1-6.

<Amount of bubbles in hard water>
Twenty specialized panelists (10 men and 10 women) thoroughly wet both hands with hard water (0.007% by mass of calcium carbonate water, hardness: 175 mg / L), and then apply 1 g of each skin cleansing composition. The hands were rubbed 20 times, and the number of people who judged that "the amount of foam was large" evaluated the "amount of foam in hard water" based on the following evaluation criteria.
In addition, the above-mentioned "large amount of foam" means that when both hands are rubbed 20 times, the foam foams to the extent that it overflows from the hand by visual measurement.
-Evaluation criteria-
◎ ◎: The number of people who answered “the amount of bubbles is large” is 18 or more and 20 or less ◎: The number of people who answered “the amount of bubbles is large” is 16 or more and 17 or less ○: “The amount of bubbles is large The number of people who answered "Large" was 11 or more and 15 or less △: The number of people who answered "Large amount of bubbles" was 6 or less and 10 or less ×: The number of people who answered "Large amount of bubbles" was 5 people or less

<Refreshing feeling during use in hard water, moist feeling after use in hard water, and lack of tension on the skin after drying after using hard water>
Twenty specialized panelists (10 men and 10 women) thoroughly wet both hands with hard water (0.007% by mass of calcium carbonate water, hardness: 175 mg / L), and then apply 1 g of each skin cleaning agent composition. After taking and rubbing both hands 20 times, rinse the skin cleaning agent composition with hard water, dry with towel, "feel refreshed during use in hard water", "feel moist after use in hard water". , And "there is no feeling of tension on the skin after drying after using hard water", based on the following evaluation criteria, "feeling refreshed during use in hard water", "use in hard water" The "moist feeling afterwards" and "the lack of firmness of the skin after drying after using hard water" were evaluated.
-Evaluation criteria for refreshing feeling during use in hard water-
⊚: 16 or more and 20 or less responded that "there is a refreshing feeling while using in hard water" ○: 11 or more and 15 or more responded that "there is a refreshing feeling while using in hard water" Names or less △: The number of people who answered "I feel refreshed while using hard water" is 6 or more and 10 people or less ×: The number of people who answered "I feel refreshed while using hard water" is 5 people Below-Evaluation criteria for moist feeling after use in hard water-
⊚: The number of people who answered “there is a moist feeling after use in hard water” is 16 or more and 20 or less ○: The number of people who answered “there is a moist feeling after use in hard water” is 11 or more and 15 Names and below △: 6 or more and 10 or less responded that "there is a moist feeling after use in hard water" ×: 5 people answered that "there is a moist feeling after use in hard water" The following-Evaluation criteria for the lack of tension on the skin after drying after using hard water-
◎: The number of people who answered that "there is no feeling of tension on the skin after drying after using hard water" is 16 or more and 20 or less. ○: "The feeling of tension on the skin after drying after using hard water" The number of people who answered "No" was 11 or more and 15 or less △: The number of people who answered "There is no feeling of tightness on the skin after drying after using hard water" is 6 or more and 10 or less ×: "Hard water" The number of people who answered "There is no feeling of firmness on the skin after drying after using" is 5 or less.

<Appearance stability>
30 mL of each skin cleansing composition was placed in a 30 mL transparent glass container (trade name: SV-30, manufactured by Nichiden Rika Glass Co., Ltd.), covered, and allowed to stand at a temperature of 50 ° C. for 4 weeks. For each skin cleansing composition after 4 weeks, one expert panelist evaluated "appearance stability" based on the following evaluation criteria.
-Evaluation criteria-
◎ ◎: There is no change in appearance and separation is not observed. ◎: Non-uniform shades are observed in a part of the appearance, but separation is not observed. 〇: Non-uniform shades are observed in the appearance, but separation is not observed. Not observed Δ: Very slight separation is observed ×: Separation is observed

Details of each component of Examples and Comparative Examples are as shown in Table 7 below.

The skin cleansing composition of the present invention can obtain a large amount of foam in hard water, and has a refreshing feeling during use in hard water, a moist feeling after use in hard water, and a dry skin after using hard water. It can be suitably used for, for example, body soap, hand soap, foam hand soap, liquid hand soap, detergent, kitchen hand soap, etc. because it does not have a tight feeling and is excellent in appearance stability.

Claims (5)

(A) A fatty acid containing stearic acid in an amount of 0.5% by mass or more and 5% by mass or less based on the skin cleansing composition.
(B) Hydroxypropyl starch phosphoric acid and
(C) Nonionic surfactant and
(D) Containing with a basic compound,
A skin cleansing composition having a mass ratio (A / B) of the content of the component (A) to the content of the component (B) of 20 or more and 80 or less. (E) The skin cleansing composition according to claim 1, further containing a chelating agent. The skin cleansing composition according to any one of claims 1 to 2, wherein the pH of the 20% by mass aqueous solution of the skin cleansing composition is 8.5 or more and 9.8 or less at 30 ° C. The skin cleansing composition according to any one of claims 1 to 3, wherein the component (A) contains stearic acid, lauric acid, myristic acid, and palmitic acid. The skin cleansing composition according to any one of claims 1 to 4, wherein the component (C) is at least one selected from an alkyl glycoside and an alkyl glucamide.