WO2019230083A1

WO2019230083A1 - Skin cleanser composition

Info

Publication number: WO2019230083A1
Application number: PCT/JP2019/007073
Authority: WO
Inventors: 澄金田; 佐和子加藤; 尚子川口
Original assignee: ライオン株式会社
Priority date: 2018-05-29
Filing date: 2019-02-25
Publication date: 2019-12-05
Also published as: JP6937435B2; JPWO2019230083A1; KR20210015742A

Abstract

This skin cleanser composition contains: (A) a fatty acid containing a stearic acid in the amount of 0.5-5 mass% with respect to a skin cleanser composition; (B) a hydroxypropyl starch phosphate; (C) a nonionic surfactant; and (D) a basic compound, wherein the mass ratio (A/B) of the content of (A) component and the content of (B) component is 20-80.

Description

Skin cleanser composition

The present invention relates to a skin cleanser composition.

Conventionally, as a skin cleanser composition, long-chain fatty acids having a high melting point such as 18 carbon atoms are used, and the blending ratio and blending amount of fatty acids having 12 to 18 carbon atoms are devised, or polymers are used. It is known that stabilization can be achieved.
A skin cleanser composition containing a polymer for stabilizing a lower fatty acid having 8 to 13 carbon atoms has been proposed (see, for example, Patent Document 1).
However, in such a skin cleanser 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 skin after drying after using hard water However, there is a problem that it is difficult to achieve both a feeling of squeezing and appearance stability.

Therefore, a large amount of foam in hard water is obtained, a refreshing feeling during use in hard water, a moist feeling after use in hard water, a lack of skin feeling after drying after using hard water, and appearance At present, the development of a skin cleansing composition having excellent stability is strongly desired.

JP 2013-67627 A

This invention makes it a subject to solve the said various problems in the past and to achieve the following objectives. That is, the present invention provides a large amount of foam in hard water, a refreshing feeling during use in hard water, a moist feeling after use in hard water, and a feeling of firmness in the skin after drying after using hard water. An object of the present invention is to provide a skin cleanser composition excellent in stability and appearance stability.

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

The present invention is based on the above findings by the present inventors, and means for solving the above problems are as follows.
<1> (A) a fatty acid containing stearic acid in an amount of 0.5% by mass to 5% by mass with respect to the skin cleanser composition;
(B) hydroxypropyl starch phosphate;
(C) a nonionic surfactant;
(D) a basic compound,
The skin cleanser composition, wherein a mass ratio (A / B) of the content of the component (A) and the content of the component (B) is 20 or more and 80 or less.
<2> (E) The skin cleanser composition according to <1>, further including a chelating agent.
<3> The skin cleanser composition according to any one of <1> to <2>, wherein the pH of a 20% by mass aqueous solution of the skin cleanser composition is 8.5 or higher and 9.8 or lower at 30 ° C. It is.
<4> The skin cleanser 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 cleanser composition according to any one of <1> to <4>, wherein the component (C) is at least one selected from alkyl glycosides and alkyl glucamides.

According to the present invention, the conventional problems can be solved, the object can be achieved, a large amount of foam is obtained in hard water, a refreshing feeling during use in hard water, and a moist after use in hard water. It is possible to provide a skin cleanser composition having excellent feeling, no feeling of firmness of the skin after drying after using hard water, and excellent appearance stability.

(Skin cleansing composition)
The skin cleansing composition of the present invention comprises (A) a fatty acid containing stearic acid in an amount of 0.5 to 5% by weight based on the skin cleansing composition, (B) hydroxypropyl starch phosphoric acid, and (C It contains a nonionic surfactant and (D) a basic compound, preferably further contains (E) a chelating agent, and further contains other components as necessary.

<(A) Fatty acid containing stearic acid in an amount of 0.5% by mass to 5% by mass with respect to the skin cleanser composition>
The fatty acid of the component (A) contains stearic acid in an amount of 0.5% by mass to 5% by mass with respect to the skin cleanser composition.
The fatty acid of the component (A) is contained in order to improve the amount of foam in hard water.

The fatty acid containing the stearic acid of the component (A) in an amount of 0.5% by mass or more and 5% by mass or less based on the skin cleansing composition is not particularly limited and can be appropriately selected depending on the purpose. Examples thereof include coconut oil fatty acid, a mixture of stearic acid and other fatty acids.
Examples of the other fatty acids include lauric acid, myristic acid, palmitic acid, capric acid, and oleic acid. These may be used individually by 1 type and may use 2 or more types together.
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 foam in hard water. It is preferable.
The fatty acid of component (A) can neutralize with the basic compound of component (D) to form a salt.

There is no restriction | limiting in particular as a fatty acid of the said (A) component, According to the objective, it can select suitably, You may use a commercial item.
Examples of the commercially available stearic acid include stearic acid (trade name: NAA-180, manufactured by NOF Corporation).
Examples of other commercially available fatty acids include lauric acid (trade name: NAA-122, manufactured by NOF Corporation), lauric acid (trade name: LAURIC ACID (POFAC 1299L), SOUTHERN ACIDS (M) BHD. ), Lauric acid (trade name: LAURIC ACID 99% (MMFA-1299), PT. MUSIM MAS, Inc.), myristic acid (trade name: NAA-142, manufactured by NOF Corporation), myristic acid ( Trade name: KORTACID 1499, manufactured by Pacific Oreo Co., Ltd., myristic acid (trade name: MYRYSTIC ACID 99%, manufactured by PT. MUSIM MAS), palmitic acid (trade name: NAA-160, manufactured by NOF Corporation), Palmitic acid (trade name: PALMITIC ACID 98%, manufactured by BEADS) I can get lost. These may be used individually by 1 type and may use 2 or more types together.

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

As content of the stearic acid of said (a1) component, it is 0.5 mass% or more and 5 mass% or less with respect to the skin cleaning composition whole quantity from the point of the quantity of the foam in hard water, and an external appearance stability. Yes, 2 mass% or more and 4 mass% or less are preferable. When the content of stearic acid as the component (a1) is less than 0.5% by mass, the amount of foam in hard water becomes insufficient. When the content of stearic acid as the component (a1) exceeds 5% by mass, the appearance stability becomes insufficient.

As content of the lauric acid of said (a2) component, 0.5 mass% or more and 10 mass% or less with respect to the skin cleaning composition whole quantity from the point of the quantity of the foam in hard water, and an external appearance stability. Preferably, 2 mass% or more and 6 mass% or less are more preferable. When the content of lauric acid as the component (a2) is 0.5% by mass or more, the amount of foam in hard water is good. When the content of lauric acid as the component (a2) is 10% by mass or less, appearance stability is good.

The content of myristic acid as 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 cleanser composition from the viewpoint of the amount of foam in hard water and appearance stability. 15 mass% or more and 30 mass% or less are more preferable. When the content of myristic acid as the component (a3) is 10% by mass or more, the amount of foam in hard water is good. When the content of myristic acid as the component (a3) is 40% by mass or less, the appearance stability is good.

As content of the palmitic acid of said (a4) component, 0.5 mass% or more and 5 mass% or less with respect to the skin cleaning composition whole quantity from the point of the quantity of the foam in hard water, and an external appearance stability. It is preferably 1% by mass or more and 4% by mass or less. When the content of palmitic acid as the component (a4) is 0.5% by mass or more, the amount of foam in hard water is good. Appearance stability is favorable in content of the palmitic acid of the said (a4) component being 5 mass% or less.

<(B) Hydroxypropyl starch phosphate>
The component (B), hydroxypropyl starch phosphate, is included to improve the moist feeling after use in hard water and the appearance stability.

Commercially available products may be used as the hydroxypropyl starch phosphate of the component (B). Examples of the commercially available product include hydroxypropyl starch phosphate (trade name: Structure XL, manufactured by Akzo Nobel).

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

[Mass ratio (A / B)]
As a mass ratio (A / B) of the content of the component (A) and the content of the component (B), a refreshing feeling during use in hard water and a moist feeling after use in hard water From 20 to 80, and preferably from 30 to 51. 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 become 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 skin feeling after drying after using hard water.

There is no restriction | limiting in particular as a nonionic surfactant of the said (C) component, According to the objective, it can select suitably, For example, alkylglycoside, alkylglucamide, etc. are mentioned.
Examples of the alkyl glycoside include decyl glucoside and alkyl glycosides having 8 to 16 carbon atoms.
Examples of the alkyl glucamide include (capryloyl / caprylmethyl glucamide), (lauroyl / myristoyl / methyl glucamide), and (cocoyl methyl glucamide). These may be used alone or in combination of two or more.
Among these, decylglucoside, (capryloyl / capryl methyl glucamide) and (lauroyl / myristoyl / methyl glucamide) are used in combination because of the lack of firmness of the skin after drying after using hard water. preferable.

There is no restriction | limiting in particular as a nonionic surfactant of the said (C) component, According to the objective, it can select suitably, You may use a commercial item.
Examples of commercially available products of the alkyl glycoside include coconut oil alkyl glucoside (trade name: Plantacare 818UP, manufactured by Cognis), lauryl glucoside (trade name: Plantacare 1200UP, manufactured by Cognis), and decylglucoside (trade name: Planta). Care 2000UP, manufactured by Cognis).
Examples of the commercially available alkylglucamide include (Capryloyl / Capryl / Methyl Glucamide) (trade name: Glucotein Clear, manufactured by Clariant), (Lauroyl / Myristoyl / Methyl Glucamide) (Product name: Glutain Flex) , Manufactured by Clariant Co., Ltd.), (capryoyl / capryl methyl glucamide) and (lauroyl / myristoyl / methyl glucamide) (trade name: glucothein plus, manufactured by Clariant Co.).

The content of the component (C) is 0.1 mass with respect to the total amount of the skin cleanser composition from the viewpoint of the lack of skin feeling after drying after using hard water and the appearance stability. % To 10% by mass is preferable, and 0.5% to 5% by mass is more preferable. When the content of the component (C) is 0.1% by mass or more, the dryness of the skin after using hard water is good. Appearance stability is favorable in content of the said (C) component being 10 mass% or less.

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

There is no restriction | limiting in particular as a basic compound of the said (D) component, According to the objective, it can select suitably, For example, an alkali metal hydroxide, an amine, an amino acid salt etc. are mentioned.
Examples of the alkali metal hydroxide include sodium hydroxide and potassium hydroxide.
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 salts include lysine salts and arginine salts.
Among these, sodium hydroxide and potassium hydroxide are preferable from the viewpoint of the amount of foam in hard water.
The basic compound of component (D) can neutralize with the fatty acid of 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 purpose, and commercially available products may be used. Examples of the commercially available product include potassium hydroxide (trade name: Potassium Hydroxide-solid, manufactured by UNID KOREA).

As the content of the component (D), from the viewpoint of the amount of foam in hard water, a refreshing feeling during use in hard water, a moist feeling after use in hard water, and appearance stability, An amount capable of neutralizing 90% by mass or more and 98% by mass or less of the fatty acid stoichiometrically is preferable, and neutralizing the fatty acid of the component (A) stoichiometrically by 92% by mass or more and 95% by mass or less. The amount that can be done is more preferred. When the content of the component (D) is an amount capable of neutralizing the fatty acid of the component (A) stoichiometrically by 90% by mass or more, the amount of foam in hard water, use in hard water Good refreshing feeling inside, moist feeling after use in hard water, and appearance stability. When the content of the component (D) is an amount capable of neutralizing 98% by mass or less of the fatty acid of the component (A) stoichiometrically, the appearance stability is good.
Moreover, as content of the said (D) component, from the point of the quantity of the foam in hard water, the refreshing feeling in use in hard water, the moist feeling after use in hard water, and the point of appearance stability, it is a skin cleansing composition. 7.1 mass% or more and 8.9 mass% or less are preferable with respect to the whole thing, and 7.2 mass% or more and 7.7 mass% or less are more preferable. When the content of the component (D) is 7.1% by mass or more, the amount of foam in hard water, a refreshing feeling during use in hard water, a moist feeling after use in hard water, and appearance stability are obtained. It is good. Appearance stability is favorable in content of the said (D) component being 8.9 mass% or less.

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

There is no restriction | limiting in particular as a chelating agent of said (E) component, According to the objective, it can select suitably, For example, edetic acid (EDTA), edetic acid salt, a citric acid, a citrate, phytic acid, phytin Examples include acid salts, polyphosphoric acid, polyphosphates, metaphosphoric acid, metaphosphates, tartaric acid, and tartrate.
Examples of the edetate include EDTA-2Na.
Among these, edetic acid and EDTA-2Na are preferable from the viewpoint of the amount of foam 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 purpose, and commercially available products may be used. Examples of the commercially available products include EDTA-2Na (trade name: VERSENE NA2, Crystals, manufactured by DOW Chemical), EDTA-2Na (trade name: Dissolvin NA-2, manufactured by Akzo Nobel), and the like.

The content of the component (E) is preferably 0.1% by mass or more and 1.0% by mass or less based on the total amount of the skin cleanser composition from the viewpoint of the amount of foam in hard water and the appearance stability. 0.2 mass% or more and 0.5 mass% or less are more preferable. Appearance stability is more excellent in content of the said (E) component being 0.1 mass% or more. When the content of the component (E) is 0.2% by mass or more, the amount of foam in hard water and the appearance stability are more excellent. Appearance stability is more excellent in content of the said (E) component being 1.0 mass% or less.

<Other ingredients>
In addition to the components (A) to (E) described above, the skin cleansing composition of the present invention is not limited to the effects of the present invention, and other components commonly used in skin cleansing compositions as necessary. These components can be blended.
The other components are not particularly limited and may be appropriately selected depending on the purpose. Examples thereof include 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, vitamins and other drugs, bactericides, preservatives, pH adjusters such as citric acid and hydrochloric acid, antioxidants, sequestering agents, UV absorbers, animals and plants Examples 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 individually by 1 type and may use 2 or more types together.
In addition, there is no restriction | limiting in particular as content of the said other component, According to the objective, it can select suitably in the range which does not inhibit the effect of this invention.

-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 less at 30 ° C. from the viewpoint of the amount of foam in hard water and appearance stability. .8 or less is more preferable, and 9.1 or more and 9.6 or less is particularly preferable. If the pH is less than 8.5, the amount of foam in hard water and the appearance stability may be insufficient. When the pH exceeds 9.8, appearance stability may be insufficient.
The pH is adjusted, for example, by adding water so that the concentration of the skin cleanser composition is 20% by mass, and then in accordance with the pH measurement method of the quasi-drug raw material standard 2006 general test method. It can be measured at 30 ° C. using a meter (device name: HM-30R, manufactured by Toa DKK Corporation).

-Dosage form-
There is no restriction | limiting in particular as a dosage form of the said skin cleaning composition, According to the objective, it can select suitably, For example, a paste form, a liquid form, a gel form etc. are mentioned.

-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 less likely to spill when picked up and easily applied to the skin and stretched. 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 viscometer (manufactured by Tokyo Keiki Co., Ltd.) under the conditions of No. 7 rotor, 30 ° C., 20 rotations / minute, 60 seconds, and the like.

-container-
The skin cleansing composition is not particularly limited and can be produced according to conventional methods of various dosage forms.
Examples of the container for the skin cleansing composition include, for example, polyethylene tubes, polyethylene laminate tubes, aluminum laminate tubes, EVAL tubes, aluminum tubes, glass-deposited plastic tubes, etc., as well as dispenser containers and squeeze containers by mechanical or differential pressure. , Laminated film containers, dropper containers, stick containers, bottle containers and the like.
The laminate film container usually has two or more layers. Examples of the laminate material include polyethylene, polyethylene terephthalate, polyester, biaxially stretched polypropylene, unstretched polypropylene, polyacrylonitrile, and ethylene-vinyl acetate copolymer. Examples thereof include synthetic resins such as coalescence, paper, and aluminum-deposited plastic. In consideration of strength, flexibility, weather resistance and the like, the laminate film container is generally a two- to five-layer container.
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, and glass. Can be used in combination of a single layer or two or more layers.

-Production method-
There is no restriction | limiting in particular as a manufacturing method of the skin cleansing composition of this invention, According to the objective, it can select suitably, For example, said (A) component, said (B) component, and said (C) component Further, if necessary, the component (E) is put into a heated container (for example, 80 ° C.) and uniformly dissolved, and then the component (D) and other components are uniformly mixed. Then, it can manufacture by cooling the said mixture (for example, cooling rate: 0.5 degree-C / min, to 40 degreeC).
The apparatus for preparing the skin cleansing composition is not particularly limited and may be appropriately selected according to the purpose.For example, a plurality of stirring blades (paddle, propeller, A stirring device equipped with a turbine, a disper, etc.). The components (A) to (E) and the other components may be used alone in preparing a skin cleansing composition, or a mixture containing two or more components. You may use in the state.

-Applications-
The skin cleanser composition of the present invention provides a large amount of foam in hard water, a refreshing feeling during use in hard water, a moist feeling after use in hard water, and a skin after drying after using hard water For example, it can be suitably used for body soap, hand soap, foam hand soap, liquid hand soap, facial cleanser, kitchen hand soap, and the like.

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. In addition, content of each component as described in an Example and a comparative example is shown by the mass%, and is all the values converted into a pure part.

(Examples 1 to 27 and Comparative Examples 1 to 9)
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 (A) component, the (B) component, the (C) component, and purified water, and if necessary, the (E) component are charged into a container preheated to 80 ° C. 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 entire skin cleansing composition. Next, in Examples and Comparative Examples other than Comparative Example 9, 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, Glycerin and propylene glycol were added and mixed uniformly. Thereafter, the mixture was cooled to 40 ° C. at a cooling rate of 0.5 ° C./min. Thereafter, a fragrance was added, and further purified water was added and mixed so that the total amount would be 100% by mass to prepare skin cleansing compositions of Examples 1-27 and Comparative Examples 1-9.
Comparative Example 9 was prepared in the same manner as in the other Examples and Comparative Examples except that the component (D) was not included and the pH of the 20% by mass aqueous solution of the mixture was 6.0.
In addition, the pH is adjusted by adding water so that the concentration of the obtained skin cleanser composition is 20% by mass, and then in accordance with the pH measurement method of the Quasi-drug Raw Material Standard 2006 General Test Method, Measurement was performed at 30 ° C. using a pH meter (device name: HM-30R, manufactured by Toa DKK Corporation).

Next, for each of the obtained skin cleanser compositions, “amount of foam in hard water”, “a refreshing feeling during use in hard water”, “moist feeling after use in hard water” , “No skin tension after drying after using hard water” and “appearance stability” were evaluated. The results are shown in Tables 1 to 6.

<Amount of foam in hard water>
After 20 specialist panelists (10 males and 10 females) wet their hands thoroughly with hard water (0.007 mass% calcium carbonate water, hardness: 175 mg / L), 1 g of each skin cleansing composition was added. Then, both hands were rubbed 20 times, and “the amount of foam in hard water” was evaluated based on the following evaluation criteria by the number of people who judged that “the amount of foam was large”.
The above “the amount of foam is large” means that when both hands are rubbed 20 times, bubbles are bubbled so as to overflow from the hands.
-Evaluation criteria-
◎◎: The number of respondents who answered “the amount of foam is large” is 18 or more and 20 or less ◎: The number of people who answered “the amount of foam is large” is 16 or more and 17 or less ○: “The amount of foam is The number of respondents who answered “Many” is 11 or more and 15 or less. △: The number of respondents who answered “The amount of foam is large” is 6 or less and 10 or less. ×: The number of respondents who answered “The amount of foam is large.” 5 or less

<Feeling of freshness during use in hard water, moist feeling after use in hard water, and lack of skin feeling after drying after using hard water>
After 20 specialist panelists (10 males and 10 females) wet their hands thoroughly with hard water (0.007 mass% calcium carbonate water, hardness: 175 mg / L), 1 g of each skin cleansing composition was added. After rubbed both hands 20 times, rinse the skin cleansing composition with hard water, towel dry, "There is a refreshing feeling during use in hard water", "Moist feeling after use in hard water" According to the following evaluation criteria, the number of people who judged that there was no feeling of skin dryness after using hard water was determined based on the following evaluation criteria, and “use in hard water” The “moist feeling after” 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-
◎: The number of people who answered “I feel refreshed while using hard water” is 16 or more and 20 or less ○: The number of people who answered “I feel refreshed when used in hard water” is 11 or more and 15 Less than name △: Number of people who answered “I feel refreshed during use in hard water” is 6 or more and 10 people or less ×: Number of people who answered “I feel refreshed during use in hard water” Below-Evaluation criteria for moist feeling after use in hard water-
◎: Number of respondents who answered “I feel moist after use in hard water” is 16 or more and 20 or less ○: Number of people who answered “I feel moist after use in hard water” is 11 or more and 15 Less than △: Number of respondents who answered “I feel moist after use in hard water” is 6 or more and less than 10 people ×: Five people who answered “I feel moist after use in hard water” Below-Evaluation criteria for lack of dryness after drying after using hard water-
◎: 16 or more and 20 or less respondents answered that “there is no skin feeling after drying after using hard water” ○: “the skin feeling after drying after using hard water” The number of respondents who answered "No" is 11 or more and 15 or less. △: The number of respondents who answered "There is no feeling of skin dryness after using hard water" is 6 or more and 10 or less. The number of people who answered that there is no feeling of skin dryness after using

<Appearance stability>
In a 30 mL glass transparent container (trade name: SV-30, manufactured by Nidec Rika Glass Co., Ltd.), 30 mL of each skin cleansing composition was placed, covered, and allowed to stand at a temperature of 50 ° C. for 4 weeks. For each skin cleanser composition after 4 weeks, one expert panelist evaluated “appearance stability” based on the following evaluation criteria.
-Evaluation criteria-
◎◎: No change in appearance, no separation is observed ◎: Uneven shading is observed in part of the appearance, but no separation is observed 〇: Uneven shading is observed in the appearance, but separation is not Not recognized △: Very little separation is observed ×: Separation is recognized

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

The skin cleanser composition of the present invention provides a large amount of foam in hard water, a refreshing feeling during use in hard water, a moist feeling after use in hard water, and a skin after drying after using hard water For example, it can be suitably used for body soap, hand soap, foam hand soap, liquid hand soap, facial cleanser, kitchen hand soap, and the like.

Claims

(A) a fatty acid containing stearic acid in an amount of 0.5% by mass to 5% by mass with respect to the skin cleanser composition;
(B) hydroxypropyl starch phosphate;
(C) a nonionic surfactant;
(D) a basic compound,
A skin cleanser composition, wherein a mass ratio (A / B) of the content of the component (A) and the content of the component (B) is 20 or more and 80 or less.
(E) The skin cleanser composition according to claim 1, further comprising a chelating agent.
The skin cleanser composition according to any one of claims 1 to 2, wherein the pH of the 20% by mass aqueous solution of the skin cleanser composition is 8.5 or higher and 9.8 or lower 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 alkyl glycosides and alkyl glucamides.