JP7474650B2 - Cleansing agent - Google Patents

Description

This invention relates to a transparent cleansing agent.

Cosmetics contain many substances with diverse properties, such as various bioactive ingredients and oily ingredients. Surfactants are used as a necessary ingredient to keep these ingredients with diverse properties stable. Surfactants gather at the interfaces of water and oil, water and air, water and powder, etc., to make them more compatible, and also exhibit actions such as emulsification, foaming, adsorption, wetting, and dispersion.
There are two types of cleansers on the market: water-based cleansers that contain surfactants and remove makeup stains through the action of the surfactants, and oil-based cleansers that remove makeup stains by dissolving oily ingredients.

In recent years, oil-type cleansers (oil-based cleansers) have become mainstream. Oil-based cleansers generally have excellent cleansing performance for makeup cosmetics such as lip color and foundation, but tend to be inferior to water-based cleansers in terms of removing film-forming mascara and other cosmetics. In addition, it has been pointed out that they take a long time to rinse off and leave a slimy feeling due to the oil remaining on the skin.
On the other hand, while aqueous cleansing agents are excellent in rinsing, it has been pointed out that they are inferior in cleansing power to makeup cosmetics that have excellent durability (makeup retention effect), such as waterproof types.
In order to solve such problems, cleansing agents that are transparent liquids while oil and water coexist have been proposed.These cleansing agents contain oil, so they have excellent makeup cleansing performance, and also contain water, so they have excellent wash-off performance, and can achieve both good cleansing performance and wash-off performance.The technology related to transparent cleansing agents that contain water and oil can be broadly divided into four types.That is, a) types that contain a lot of oil and little water, b) types that contain little oil and much water, c) types that contain a lot of both oil and water, and d) types that contain little oil and water and a lot of surfactant or polyol.

Many compositions of these types of cleansing agents have been disclosed, but the following characteristics and problems are known.
a) Cleansing agents that are high in oil and low in water (see Patent Documents 1 and 2) contain 15 mass % or less water and have a high proportion of oil. As a result, their performance is similar to that of oil-based cleansing agents. While they have high cleansing performance against makeup, they have been pointed out as having problems with the ease of rinsing.

b) Cleansing agents that are low in oil and high in water (see Patent Documents 3 and 4) contain 10% or less oil by weight and have a high proportion of water. As a result, they have characteristics similar to water-based cleansers in terms of performance, and are easy to wash off, but they have been pointed out to have inferior cleansing performance.

c) Cleansing agents that are high in both oil and water (see Patent Documents 5 and 6) contain high amounts of nonionic surfactants or surfactant assistants such as monohydric alcohols with 2 to 5 carbon atoms, dihydric alcohols such as butylene glycol and dipropylene glycol, polyethylene glycol, polypropylene glycol, or derivatives of these compounds, in order to maintain stability over a wide temperature range from low to high. However, when these ingredients are used in high amounts, there are concerns that they may irritate or dry the skin, or irritate the eyes during use, and there is also the problem that they may reduce the moisturizing feeling after cleansing.

d) Cleansing agents that are low in both oil and water and high in surfactants or polyols (Patent Document 7, Patent Document 8) contain nonionic surfactants or polyols as their main ingredients. Problems that have been pointed out about the inclusion of these ingredients include safety to the skin and the fact that the agent spreads easily when used.

The inventor of the present application also proposed a cleansing oil that is an oil-type cleansing agent, but whose cleaning power does not decrease even if water is mixed in during cleansing (Patent Document 9). This cleansing agent has the characteristic that it becomes a fine emulsified particle size when washed off, and does not leave an oily sticky feeling. This cleansing agent contains Component A: either or both of a diester of a branched fatty acid having 14 to 22 carbon atoms and polyglycerin, or a diester of an unsaturated fatty acid having 14 to 22 carbon atoms and polyglycerin, Component B: an ester of a fatty acid having 6 to 10 carbon atoms and polyglycerin, in which the ratio of the degree of polymerization of polyglycerin to the number of bonds of fatty acid (= degree of polymerization of polyglycerin/number of bonds of fatty acid) is 2.0 to 4.0, Component C: one or more selected from the group consisting of a diester oil of a dihydric alcohol and a branched fatty acid, a triester oil of glycerin and a branched fatty acid, and a diester oil of a dicarboxylic acid and a branched aliphatic alcohol, and Component D: a hydrophilic compound. This cleansing agent quickly reduces the residual oily feeling when rinsed off after cleansing, but to achieve a refreshing effect after washing, it is thought that it is necessary to further reduce the residual oily feeling. Also, because it is an oil-type cleansing agent, there was an issue with its cleansing power against film-type makeup cosmetics.

Patent No. 4373103 Japanese Patent No. 5410650 Japanese Patent No. 6006152 Patent No. 6274998 Japanese Patent No. 4658976 Patent No. 5468314 Patent No. 6247849 Japanese Patent No. 6294642 Patent No. 6234533

In order to reduce the cleaning effect of a cleansing agent and the residual feeling of oil contained in a cleansing agent containing an oil component on the skin after washing with water, a cleansing agent containing both oil and water is effective.However, in addition to the problems described in the above-mentioned conventional technology, when both water and oil are contained, cloudiness and separation often occur, which impairs the beauty and performance of the cosmetic.In addition, even if it is transparent at room temperature, cloudiness and separation may occur when stored for a long time at high or low temperatures, so there is a demand for a transparent cleansing agent that is stable over a wide temperature range.
Furthermore, with a wide variety of makeup cosmetic products being marketed, consumers have a wide range of choices, and it has become difficult to remove makeup satisfactorily with just one cleansing product.
In view of the current situation, an object of the present invention is to provide a cleansing agent that contains water and oil, is transparent and stable over a wide temperature range, has high detergency against many different types of oil-based and water-based makeup cosmetics (e.g., lip color, waterproof mascara, film-type mascara), leaves little residual oily components after washing, and is easy to wash off with water.

The main configuration of the present invention is as follows.
(1) A transparent cleansing agent containing the following ingredients (A) to (E):
(A) a diester of a branched fatty acid and/or an unsaturated fatty acid having 14 to 22 carbon atoms with a polyglycerin; (B) an ester of a linear fatty acid having 6 to 10 carbon atoms with a polyglycerin, the ratio of the degree of polyglycerin polymerization to the number of fatty acid bond residues per molecule (degree of polyglycerin polymerization/number of fatty acid bond residues) being 2.5 to 3.5; (C) an oil; (D) one or more selected from glycerin, diglycerin, polyglycerin-3, polyglycerin-4, polyglycerin-5, polyglycerin-6 and polyglycerin-10.
(E) 13 to 47% by mass of water based on the total amount of the cleansing agent
(2) The transparent cleansing agent according to (1), wherein the component (B) is one or more selected from triglyceryl caprylate, pentaglyceryl dicaprylate, eicosaglyceryl hexacaprylate, eicosaglyceryl hexacaprate, triglyceryl caprate, hexaglyceryl dicaprylate, and hexaglyceryl dicaprate.
(3) A transparent cleansing agent according to (1) or (2), in which the total content of the components (A) and (B) is 5 to 30 mass % based on the total amount of the cleansing agent, and the mass ratio of (A) to (B) ((A)/(B)) is 4/1 to 1/3.
(4) A transparent cleansing agent according to any one of (1) to (3), which contains 20 to 50% by mass of the component (C) based on the total amount of the cleansing agent.

According to the present invention, a transparent and stable cleansing agent can be obtained while containing a high content of both water and oil. The cleansing agent of the present invention is stable in a wide temperature range of 5°C to 50°C, and is transparent and uniform. In addition, the cleansing agent of the present invention has a strong cleansing power for different types of makeup cosmetics, such as oil-based makeup cosmetics (e.g., lip color), waterproof makeup cosmetics (e.g., waterproof eyeliner), and film-type makeup cosmetics (e.g., film-type mascara). This excellent cleansing power is not limited to the consumer's usage situation (whether or not water is mixed in), and a stable cleansing power is realized in any usage situation, so that the design quality is far superior to that of conventional cleansing agents.
The cleansing agent of the present invention can be washed away easily with water without leaving any oily residue on the skin.

1 is a graph showing the change in detergency (subject to be cleaned: lip color) measured when water is added to the cleansing agents of Example 22, Comparative Example 35, and Comparative Example 37. 1 is a graph showing the results of a cleaning test of a waterproof eyeliner when the cleansing agents of Examples 14, 22, and Comparative Examples 35 to 37 are used. 1 is a graph showing the results of a cleaning test of a film-type mascara when the cleansing agents of Examples 14, 22, and Comparative Examples 35 to 37 were used. 1 is a graph showing the results of measuring the volume average particle diameter of emulsified particles when the cleansing agents of Examples 14, 22, and Comparative Examples 35 and 36 were dispersed in water at a concentration of 0.1% by mass.

The ingredients used to prepare the transparent cleansing agent of the present invention are described below.
In the present invention, "transparent" refers to a state in which the cleansing agent is filled into a transparent glass container having a diameter of 30 mm, and 10-point type can be read with the naked eye by looking through the layer of the cleansing agent from the side.

Component (A): Diester of C14-22 branched fatty acid or unsaturated fatty acid and polyglycerol The cleansing agent of the present invention uses, as component (A), a diester of C14-22 branched fatty acid and/or unsaturated fatty acid and polyglycerol.
Examples of the diester of a branched fatty acid having 14 to 22 carbon atoms and polyglycerol, and the diester of an unsaturated fatty acid having 14 to 22 carbon atoms and polyglycerol, which are component (A), include polyglyceryl-10 diisostearate and polyglyceryl-10 dioleate.
The blending amount of either or both of the diester of a branched fatty acid having 14 to 22 carbon atoms and polyglycerol, or the diester of an unsaturated fatty acid having 14 to 22 carbon atoms and polyglycerol, as component (A) is preferably 1 to 30 mass% based on the total amount of the cleansing agent, more preferably 3 to 20 mass%, and particularly preferably 5 to 15 mass%.
The polyglycerin in the polyglycerin fatty acid ester preferably has an average degree of polymerization of 5 to 15.

Component (B): Ester of polyglycerin and linear fatty acid having 6 to 10 carbon atoms, in which the ratio of polyglycerin polymerization degree to number of fatty acid bonded residues per molecule is 2.5 to 3.5 The cleansing agent of the present invention contains, as component (B), an ester of polyglycerin and linear fatty acid having 6 to 10 carbon atoms, in which the ratio of polyglycerin polymerization degree to number of fatty acid bonded residues per molecule is 2.5 to 3.5.
As the ester of a straight-chain fatty acid having 6 to 10 carbon atoms and a polyglycerin having a ratio of polyglycerin polymerization degree to the number of fatty acid bonded residues (polyglycerin polymerization degree/number of fatty acid bonded residues) of 2.5 to 3.5 per molecule, which is the component (B), triglyceryl caprylate (ratio of polyglycerin polymerization degree to the number of fatty acid bonded residues is 3.0), pentaglyceryl dicaprylate (2.5), eicosaglyceryl hexacaprylate (3.3), eicosaglyceryl hexacaprate (3.3), triglyceryl caprate (3.0), hexaglyceryl dicaprylate (3.0), and hexaglyceryl dicaprate (3.0) are preferred, and eicosaglyceryl hexacaprylate or hexaglyceryl dicaprate (3.0) are more preferred. When rinse-off performance is particularly important, eicosaglyceryl hexacaprylate is most preferred.
Furthermore, the blending amount of component (B) is preferably from 0.5 to 30% by mass, more preferably from 1 to 20% by mass, and particularly preferably from 3 to 10% by mass, based on the total amount of the cleansing agent.

In the cleansing agent of the present invention, the total content of the components (A) and (B) is preferably 5 to 30% by mass, more preferably 8 to 20% by mass, and even more preferably 10 to 20% by mass, based on the total amount of the cleansing agent. The content ratio of the components (A) and (B) is preferably such that the ratio of (A) to (B) ((A)/(B)) is 4/1 to 1/3. If the ratio of (A) to (B) ((A)/(B)) exceeds 4/1 or falls below 1/3, there is an increased risk that it will be difficult to maintain transparency and stability over a wide temperature range.

Component (C): Oil The cleansing agent of the present invention contains an oil as component (C).
Examples of the oil agent (C) blended in the present invention include the following.
Examples of the oils and fats include natural animal and vegetable oils and semi-synthetic oils and fats, hydrocarbon oils, ester oils, glyceride oils, silicone oils, fat-soluble vitamins, higher fatty acids, animal and vegetable and synthetic essential oil components, etc. Examples of the oils and fat ... Examples of ester oils include diisobutyl adipate, 2-hexyldecyl adipate, di-2-heptylundecyl adipate, isostearyl isostearate, trimethylolpropane triisostearate, cetyl ethylhexanoate, isotridecyl isononanoate, ethylhexyl palmitate, triethylhexanoin, neopentyl glycol di-2-ethylhexanoate, trimethylolpropane tri-2-ethylhexanoate, pentaerythritol tetra-2-ethylhexanoate, cetyl octanoate, oleyl oleate, octyldodecyl oleate, decyl oleate, neopentyl glycol dicaprate, Examples of the oils include 2-ethylhexyl succinate, isocetyl stearate, butyl stearate, diisopropyl sebacate, cetyl lactate, tetradecyl lactate, isopropyl myristate, octyl palmitate, 2-hexyldecyl palmitate, 2-heptylundecyl palmitate, cholesteryl 12-hydroxystearate, phytosteryl oleate, diisostearyl malate, paramethoxycinnamate, pentaerythritol tetrarosinate, caprylyl caprylate/caprate, coconut alkyl caprylate/caprate, dicaprylyl ether, butylene glycol diisononanoate, and diethylhexyl succinate. Examples of the glyceride oil include glyceryl triisostearate, glyceryl triisopalmitate, glyceryl tri-2-ethylhexanoate, glyceryl tritetradecanoate, and glyceryl di-paramethoxycinnamate monoisooctylate. Examples of silicone oils include higher alkoxy-modified silicones such as dimethylpolysiloxane, methylphenylpolysiloxane, methylhydrogenpolysiloxane, octamethylcyclopentasiloxane, decamethylcyclohexasiloxane, diphenylsiloxyphenyltrimethicone, and stearoxysilicone, alkyl-modified silicones, and higher fatty acid ester-modified silicones. Examples of fat-soluble vitamins include tocopherol, and examples of essential oils include orange peel oil and rosemary leaf oil.
Among these, cetyl ethylhexanoate, isotridecyl isononanoate, ethylhexyl palmitate, triethylhexanoin, caprylyl (caprylic acid/capric acid), coconut alkyl (caprylic acid/capric acid), dicaprylyl ether, butylene glycol diisononanoate, diethylhexyl succinate, mineral oil, avocado oil, medusa oil, olive fruit oil, tocopherol, orange peel oil, and rosemary leaf oil are preferred, and cetyl ethylhexanoate, isotridecyl isononanoate, ethylhexyl palmitate, triethylhexanoin, caprylyl (caprylic acid/capric acid), coconut alkyl (caprylic acid/capric acid), dicaprylyl ether, butylene glycol diisononanoate, diethylhexyl succinate, and mineral oil are particularly preferred. The oil agent of component (C) may be formulated alone, or may be incorporated in a combination of two or more. The cleansing agent of the present invention contains component (C) in an amount of preferably 20 to 50% by mass, and more preferably 25 to 50% by mass, based on the total amount of the cleansing agent.

Component (D): glycerin, diglycerin, polyglycerin-3, polyglycerin-4, polyglycerin-5, polyglycerin-6, and polyglycerin-10 The cleansing agent of the present invention contains one or more components selected from glycerin, diglycerin, polyglycerin-3, polyglycerin-4, polyglycerin-5, polyglycerin-6, and polyglycerin-10. These components act as solvents for the oil contained in the cleansing agent, and contribute to the transparency and stability of the cleansing agent.
The cleansing agent of the present invention contains component (D) in an amount of 5 to 40% by mass, preferably 7 to 35% by mass, and more preferably 7 to 30% by mass, based on the total amount of the cleansing agent. Outside this range, there is a high risk that a transparent and stable cleansing agent will not be obtained.

Component (E): Water The cleansing agent of the present invention contains 13 to 47% by mass of water as component (E) in order to obtain a cleaning effect and a rinsing effect. If the water content is less than 13% by mass, it may be difficult to remove film-type makeup cosmetics (e.g., film-type mascara). If the water content exceeds 47% by mass, there is a high possibility that the cleansing power for makeup cosmetics with excellent durability (makeup retention effect), such as waterproof makeup cosmetics (e.g., waterproof eyeliner), may decrease. In the present invention, by setting the content of component (E) in the range of 13 to 47% by mass, the cleansing agent of the present invention can remove all different types of makeup cosmetics (e.g., lip liner, waterproof eyeliner, film-type mascara). In the present invention, the blending amount of component (E) is preferably 13 to 47% by mass, more preferably 15 to 45% by mass, based on the total amount of the cleansing agent.

Blending of optional components In addition, various raw materials commonly used in cosmetics can be blended into the transparent cleansing agent of the present invention within the range that does not impair the effects of the present invention. For example, polyhydric alcohols such as butylene glycol (BG), dipropylene glycol (DPG), and pentylene glycol, preservatives, pH adjusters such as dipotassium phosphate, neutralizers, antioxidants, fragrances, colorants (e.g., cyanocobalamin, (chlorophyllin/copper) complex), beauty ingredients (e.g., rosemary extract), etc. can be blended.

The transparent cleansing agent of the present invention is designed in various formulations taking into consideration ease of use and feel when used. Specifically, it is in liquid or gel form.

Examples and comparative examples of the cleansing agent of the present invention are shown below, and the features and effects of the present invention are described in more detail using test examples.
1. Efficacy Test Method The cleansing agents of the Examples and Comparative Examples were evaluated by the following methods.
<Method for checking stability over time (appearance observation)>
The prepared cleansing agent was filled into a transparent glass bottle with a screw cap having a diameter of 30 mm, and the transparency was evaluated by looking through the container from the side at room temperature (RT, 25° C.) and determining whether the 10-point type could be read. In addition, for transparent products, the uniformity was evaluated visually.
In this test, no transparent or non-uniform samples were found. Therefore, the following descriptions are used in the table.
Transparent: Transparent and uniform
Cloudy: Cloudy and opaque (Things that do not meet the criteria for "transparent" above are considered cloudy)
Separation: A state in which something is separated into two or more phases

The samples that were transparent immediately after preparation were stored in temperature-controlled rooms at 5°C, 25°C, 40°C, and 50°C.
For samples that were separated immediately after preparation, stability tests were not performed and are marked with "-" in the table. The appearance after storage at each temperature for one month was observed at each storage temperature. The words in the table indicate the following conditions.
○: Transparent and uniform
Cloudy: Cloudy and opaque (those that do not meet the criteria for "transparent" above are considered cloudy)
Separation: A state in which something is separated into two or more phases
Hazy: Transparent but hazy and not uniform. In this test, no samples were found to be hazy.

<Evaluation method for wash-off performance (volume-based average diameter)>
The cleansing agent used in the test was diluted with water to 0.1% to prepare an O/W type emulsion composition, and the particle size distribution of the emulsion particles in this composition was measured by dynamic light scattering using an ELSZ-1000 (manufactured by Otsuka Electronics Co., Ltd.), and the volume-based average diameter was measured. This emulsion particle size (volume-based average diameter) was used to evaluate the washability.
Regarding the relationship between the emulsion particle size and the wash-off effect, the following is described in Japanese Patent No. 6234533.
(1) If the emulsion particle size is large, an oily feeling remains on the skin.
(2) If the emulsion particle size formed when water is added is 300 nm or less, it can be washed away quickly and easily.
In this test, an apparatus capable of measuring emulsion particle sizes of 100 nm or less was introduced, and the following (3) was added.
(3) If the emulsion particle size is 100 nm or less, it can be washed away more quickly and thoroughly.
In this test, it was considered that the wash-off performance could be evaluated based on the size of the emulsion particle diameter as described above in (1) to (3), so the emulsion particle diameter (volume-based average diameter) was tested and evaluated. The table shows the numerical value of the emulsion particle diameter (volume-based average diameter) as it is. In the table, "-" indicates that separation or cloudiness occurred immediately after preparation, or the measurement was not performed due to an insufficient sample amount.

Next, the cleansing power of the transparent cleansing agent of the present invention was tested and evaluated assuming different usage situations (with and without mixing with water).
That is, the "cleansing power when mixed with water" was evaluated using a lip color, which is a representative example of an oil-based makeup cosmetic, and the "cleansing power when not mixed with water" was evaluated using a waterproof eyeliner, which is a representative example of a waterproof type makeup cosmetic, and a film-type mascara, which is a representative example of a film-type makeup cosmetic.
<Method for evaluating cleansing power when mixed with water>
(1) 0.004 g of lip color (FANCL Moisture Rouge P #84 Velvet Red) was applied to a 2 cm x 2 cm frame of white artificial leather measuring 3 cm x 6 cm, and allowed to dry for 30 minutes. This was used as a test specimen.
(2) The color value (Lab 1) of the prepared test sample was measured using a color difference meter (device name: CM-2600d, manufactured by Konica Minolta, Inc.).
(3) Test samples were prepared by adding a predetermined amount (40%, 60%, 80%, 100%) of water to 100% by mass of the cleansing agent prepared in each of the Examples and Comparative Examples.
(4) 0.1 ml of the test sample prepared in (3) was dropped onto the test specimen prepared in (1) above, and the test specimen was rubbed with a finger 20 times at a speed of once per second.
(5) The test specimen was thoroughly rinsed with water and dried.
(6) The color value (Lab2) of the test specimen after drying was measured using a color difference meter.
(7) The makeup cleansing rate was calculated using the following formula.
Makeup removal rate (%) = 100 x [(L1-L2)2 + (a1-a2)2 + (b1-b2)2]1/2 / [(L1-L0)2 + (a1-a0)2 + (b1-b0)2]1/2
However, Lab0 is the color value of white artificial leather before applying lip color.

<How to evaluate cleansing power (waterproof eyeliner, film-type mascara)>
(1) 0.005 g of makeup product was applied to a 1 cm diameter frame of white artificial leather measuring 3 cm x 6 cm, and allowed to dry for 30 minutes. This was used as a test specimen.
As a waterproof eyeliner, Maybelline New York Masterliner Creamy Pencil BK-1 was used.
As a film-type mascara, Attenir Perfect Mascara R 21 was used.
(2) The color value (Lab 1) of the prepared test specimen was measured using a color difference meter (device name: CM-2600d, manufactured by Konica Minolta, Inc.).
(3) 0.1 ml of the test sample was dropped onto the test specimen prepared in (1) above, and the test specimen was rubbed with a finger 20 times at a speed of once per second.
(4) The test specimen was thoroughly rinsed with water and dried.
(5) The color value (Lab2) of the test specimen after drying was measured using a color difference meter.
(6) The makeup cleansing rate was calculated using the following formula.
Makeup removal rate (%) = 100 x [(L1-L2)2 + (a1-a2)2 + (b1-b2)2]1/2 / [(L1-L0)2 + (a1-a0)2 + (b1-b0)2]1/2
However, Lab0 is the color value of white artificial leather before applying makeup.

2. Confirmation of the effect of adding component (D) Component (A): Polyglyceryl-10 diisostearate
(B) Component: Polyglyceryl-20 hexacaprylate
(C) Component: Cetyl ethylhexanoate
Component (C): Triethylhexanoin
Component (D): Glycerin Component (E): Water 35% by mass
Cleansing agents were prepared according to the compositions of Example 1, which contained the above-mentioned (A) to (E) components, and Comparative Examples 1 to 5, which contained no (D) component and changed the amount of water contained in component (E) (Table 1 below). The preparation method involved mixing the respective components and stirring while heating to obtain a transparent cleansing agent.
Using Example 1 and Comparative Examples 1 to 5, the transparency and uniformity immediately after preparation, the wash-off performance (volume-based average diameter), and changes during storage were tested. The evaluation results of the effect of blending component (D) are shown in the lower part of Table 1.
The amounts in the recipe shown below are all expressed as mass % per composition.

In Example 1, in addition to glycerin, which is the component (D), BG is blended as an optional component. Example 1 was stable in the temperature range of 5°C to 50°C.
On the other hand, Comparative Examples 1 to 5 do not contain the component (D). In addition, the oil/water ratio was changed, but in Comparative Examples 1 to 4, none of the cleansing agents was transparent when observed immediately after preparation, and none was transparent and stable even after one month of storage (temperature range of 5°C to 50°C). Comparative Example 5 was transparent immediately after preparation, but was not transparent and stable after one month of storage (temperature range of 5°C to 50°C).
From the above tests of Example 1 and Comparative Examples 1 to 5, it was found that the incorporation of component (D) is important for transparency and temperature stability.

3. (D) Confirmation of the effect of different ingredients (A) Component: Polyglyceryl-10 diisostearate
(B) Component: Polyglyceryl-20 hexacaprylate
(C) Component: Cetyl ethylhexanoate
Component (C): Triethylhexanoin
(C) Ingredient: Caprylyl (Caprylic/Capric Acid)
(C) Component: Dicaprylyl ether
Component (D): Glycerin
Component (D): Polyglycerin-5
Component (E): Water 25% by mass, 40% by mass
Cleansing agents of Examples 2 and 3 (compositions in Table 2) containing the above components (A) to (E) were prepared. Similarly, cleansing agents of Comparative Examples 6 to 15 (compositions in Table 2) containing no component (D) and varying amounts of water as component (E) were prepared. Using these Examples 2 and 3 and Comparative Examples 6 to 15, the transparency and uniformity immediately after preparation, the rinsing performance (volume-based average diameter), and changes due to storage were tested in the same manner as in Example 1. The results of evaluating the effect of the incorporation of component (D) are shown in the lower part of Table 2.

The cleansing agents of Examples 2 and 3 contained glycerin and polyglycerin-5 as component (D), and both were transparent and highly stable cleansing agents.
On the other hand, it was difficult to prepare a transparent and highly stable cleansing agent using BG or DPG, as shown in Comparative Examples 6 to 13. Furthermore, the compositions of Comparative Examples 14 and 15 used sorbitol or methyl gluceth-10, which is widely used as a moisturizing agent, but it was not possible to prepare a cleansing agent that was transparent and highly stable for a long period of time.
From the above tests, it was found that glycerin and polyglycerin-5 have a high effect on the transparency and stability of the cleansing agent.

4. Confirmation of the blending effect due to differences in the polymerization degree of polyglycerin (D) Component (A): Polyglyceryl-10 diisostearate
(B) Component: Polyglyceryl-20 hexacaprylate
(C) Component: Cetyl ethylhexanoate
Component (C): Triethylhexanoin
Component (D): one or more selected from glycerin, diglycerin, polyglycerin-3, polyglycerin-4, polyglycerin-5, polyglycerin-6 and polyglycerin-10; Component (E): water 20 mass%, 30 mass%, 35 mass%, 40 mass%
Cleansing agents having the compositions of Examples 4 to 16 (Table 3 below) were prepared by blending the above components (A) to (E).
A similar test to confirm the blending effect was carried out for the cleansing agents of Examples 4 to 16. The evaluation results are shown in the lower part of Table 3 below.

As shown in Examples 4 to 16, it was found that glycerin, diglycerin, polyglycerin-3, polyglycerin-4, polyglycerin-5, polyglycerin-6 and polyglycerin-10 were all preferable as component (D).

5. Confirmation of the combined effect of components (A) and (B) and the effect of differences in other surfactants Component (A): Polyglyceryl-10 diisostearate
(B) Component: Polyglyceryl-20 hexacaprylate
(C) Component: Cetyl ethylhexanoate
Component (C): Triethylhexanoin
(C) Ingredient: Caprylyl (Caprylic/Capric Acid)
(C) Component: Dicaprylyl ether
Component (D): Glycerin
Component (E): 35% by mass of water
A cleansing agent of Example 17 (composition in Table 4) containing the above components (A) to (E) was prepared. Similarly, compositions of Comparative Examples 16 to 25 (compositions in Table 4) were prepared as examples in which either one of components (A) and (B) was added or the components were combined with other nonionic surfactants and the amounts of components (D) and (E) were changed, and similarly evaluated.

As shown in Example 17, by combining components (A) and (B) and adopting the composition of the present invention ((A)+(B)+(C)+(D)+(E)), a transparent and highly stable cleansing agent was obtained.
On the other hand, Comparative Examples 16 and 17 are compositions in which either component (A) or component (B) was used alone. Comparative Examples 16 and 17 separated immediately after preparation.
In addition, Comparative Examples 18 to 21 are compositions in which PEG-20 glyceryl triisostearate and PEG-8 glyceryl isostearate, which are used in general cleansing agents, are combined with either component (A) or component (B) used in the present invention. Comparative Examples 19 to 21 separated immediately after preparation, and Comparative Example 18 was unable to prepare a temperature-stable transparent cleansing agent.
Furthermore, Comparative Examples 22 to 25 are compositions using PEG-20 glyceryl triisostearate and PEG-8 glyceryl isostearate, which are generally used in cleansing agents, alone or in combination. Comparative Examples 23 to 25 separated immediately after preparation. Comparative Example 22 did not become a temperature-stable transparent cleansing agent.
From the results of the above examples and comparative examples, it was found that in order to prepare a transparent, temperature-stable cleansing agent, it is necessary to use a combination of both surfactants, component (A) and component (B).

6. Confirmation of the effect of the ratio of the degree of polymerization of polyglycerin and the number of fatty acid bonds (degree of polymerization of polyglycerin/number of fatty acid bonds) of components (A) and (B) Component (A): Polyglyceryl-10 diisostearate
(A) Component: Polyglyceryl-10 dioleate
(B) Component: Polyglyceryl-20 hexacaprylate
(B) Component: Polyglyceryl-6 dicaprate
(C) Component: Cetyl ethylhexanoate
Component (C): Triethylhexanoin
(C) Ingredient: Caprylyl (Caprylic/Capric Acid)
(C) Component: Dicaprylyl ether
Component (D): Glycerin
Component (E): 35% by mass of water
Cleansing agents of Examples 18 and 19 (compositions shown in Table 5) were prepared by blending the above components (A) to (E).
Polyglyceryl-10 diisostearate and polyglyceryl-10 dioleate were selected as component (A), and polyglyceryl-20 hexacaprylate and polyglyceryl-6 dicaprate were selected as component (B). Polyglyceryl-10 isostearate was selected as a comparative example of component (A), and polyglyceryl-20 octaisononanoate, polyglyceryl-20 penta(caprylic acid/capric acid), polyglyceryl-10 trilaurate, and polyglyceryl-4 laurate were selected as comparative examples of component (B).
The compositions of the examples and comparative examples, the carbon chain length of the polyglycerol ester, the presence or absence of branching of the bound fatty acid, and the ratio of the degree of polymerization of the polyglycerol to the number of bound fatty acids (degree of polymerization of the polyglycerol/number of bound fatty acids) are shown in Table 5. For the sake of explanation, Example 17 shown in Table 4 is also shown in Table 5.

Results of investigation of component (A) As is clear from the evaluation results of Examples 17 and 18, a transparent, temperature-stable cleansing agent could be prepared using either polyglyceryl-10 diisostearate or polyglyceryl-10 dioleate as component (A).
On the other hand, in the composition not containing component (A) and containing polyglyceryl-10 isostearate as shown in Comparative Example 26, separation occurred immediately after preparation.
It was found that decaglycerin, which is a diester of a branched or unsaturated fatty acid having a carbon number of 18, is desirable as component (A). In other words, it was determined that a diester of a branched and/or unsaturated fatty acid having a carbon number of 14 to 22 and polyglycerin is desirable as component (A).

Results of investigation into component (B) As shown in the evaluation results of Example 19, when polyglyceryl-6 dicaprate was used as component (B), a transparent and stable cleansing agent could be prepared.
On the other hand, as shown by the evaluation results of Comparative Examples 27 to 34, when other polyglycerol fatty acid esters were used instead of component (B), temperature-stable transparent cleansing agents could not be prepared in Comparative Examples 27, 28, and 32, and separation occurred immediately after preparation in Comparative Examples 29 to 31, 33, and 34.
As component (B), the more preferable results were that the degree of esterification of the polyglycerol fatty acid ester is such that the ratio of the degree of polymerization of polyglycerol to the number of bonds of fatty acid (degree of polymerization of polyglycerol/number of bonds of fatty acid) is 2.5 to 3.5, the number of carbon atoms of the fatty acid is C8 to C10, and the fatty acid is a straight chain. That is, it was determined that the more preferable results were that the degree of esterification of the polyglycerol fatty acid ester is such that the ratio of the degree of polymerization of polyglycerol to the number of bonds of fatty acid (degree of polymerization of polyglycerol/number of bonds of fatty acid) is 2.5 to 3.5, the number of carbon atoms of the fatty acid is C6 to C10, and the fatty acid is a straight chain fatty acid.

7. Confirmation of the concentration effect of components (A) and (B) Component (A): Polyglyceryl-10 diisostearate
(B) Component: Polyglyceryl-20 hexacaprylate
(C) Component: Cetyl ethylhexanoate
Component (C): Triethylhexanoin
Component (D): Glycerin
Component (E): 30% by mass of water
Cleansing agents of Examples 20 and 21 (compositions in Table 6) containing the above components (A) to (E) were prepared. In the above test example, the test was performed with a total content of components (A) and (B) of 16% by mass, but in this test, the total content of components (A) and (B) was set to 12.5% by mass and evaluation was performed in the same manner.

The cleansing agents having the compositions of Examples 20 and 21 received favorable results in all evaluations.
It was confirmed that a transparent, temperature-stable cleansing agent could be obtained even when the contents of components (A) and (B) were reduced.

8. Consideration of component (C) Component (A): Polyglyceryl-10 diisostearate
(B) Component: Polyglyceryl-20 hexacaprylate
Component (C): Cetyl ethylhexanoate Component (C): Isotridecyl isononanoate Component (C): Ethylhexyl palmitate Component (C): Triethylhexanoin
Component (D): Glycerin
Component (E): 30% by mass of water
Cleansing agents of Examples 22 to 26 (compositions in Table 7) containing the above components (A) to (E) were prepared.
The cleansing agents of Examples 22 to 26, which contained cetyl ethylhexanoate, isotridecyl isononanoate, ethylhexyl palmitate, and triethylhexanoin as component (C), were similarly evaluated. The results are shown in Table 7.

All of the evaluations of Examples 22 to 26 were favorable. By blending one or more of cetyl ethylhexanoate, isotridecyl isononanoate, ethylhexyl palmitate, and triethylhexanoin as the oil agent (C), a temperature-stable and transparent cleansing agent was obtained.

9. Consideration of the combination of oils to be mixed with component (C) Component (A): Polyglyceryl-10 diisostearate
(B) Component: Polyglyceryl-20 hexacaprylate
(C) Component: Cetyl ethylhexanoate
Component (C): Triethylhexanoin
(C) Ingredient: Caprylyl (Caprylic/Capric Acid)
(C) Component: Dicaprylyl ether
Component (C): Butylene glycol diisononanoate
Component (C): diethylhexyl succinate
(C) Component: Mineral oil (D) Component: Glycerin
Component (E): Water 20% by mass, 35% by mass
Cleansing agents of Examples 27 to 32 (compositions in Table 8) containing the above components (A) to (E) were prepared.
Examples 27 to 32, which contained a combination of cetyl ethylhexanoate, triethylhexanoin, caprylyl (caprylate/caprate), dicaprylyl ether, butylene glycol diisononanoate, diethylhexyl succinate, and mineral oil as component (C), were similarly evaluated.
The composition and evaluation results are shown in Table 8 below.

The evaluation results of Examples 27 to 32 showed that when cetyl ethylhexanoate, triethylhexanoin, caprylyl (caprylate/caprate), dicaprylyl ether, butylene glycol diisononanoate, diethylhexyl succinate, and mineral oil were combined and formulated as component (C), a transparent, temperature-stable cleansing agent was prepared in each case.

10. Test to confirm the effect according to the actual use The transparent cleansing agents of Example 14 and Example 22 described above were used to test the cleansing power in a situation according to the actual use. The actual use means, for example, that the agent is used in a bathroom or the like and water is mixed in. The test method was evaluated according to the method described above, <Method for evaluating cleansing power when mixed with water (subject to be cleaned: lip color)>.
As another example of actual usage, since many people remove their eyeliner and mascara makeup indoors, indoor use (a situation where water is not mixed in) was assumed, and tests and evaluations were performed according to the above-mentioned <Evaluation method of cleansing power (subjects to be cleaned: waterproof eyeliner, film-type mascara)>. Cleansing agents having the compositions of Comparative Examples 35 to 37 were also prepared and similarly tested and evaluated.
Comparative Example 35 is a composition lacking the components B, D, and E of the present invention ((A) + (C) is the same), Comparative Example 36 is a composition lacking the components B and E of the present invention ((A) + (C) + (D) is the same), and Comparative Example 37 is a composition lacking the components (A), (B), (D), and (E) of the present invention ((C) is the same). Comparative Examples 35 to 37 are transparent cleansing agents to which optional ingredients are added. Polyglyceryl-20 octaisononanoate, sorbeth-30 tetraoleate, polysorbate 80, and sorbitan oleate, which are blended in Comparative Examples 35 to 37, are surfactants. The compositions of Comparative Examples 35 to 37 are typical compositions of conventional oil-based cleansing agents.
The compositions of Examples 14 and 22 and Comparative Examples 35 to 37 are shown in Table 9 below. Comparative Examples 35 to 37 are compositions that contain absolutely no water (E) or substantially no water (E) (water content is 1% by mass or less), and have been confirmed to have strong cleaning power against waterproof eyeliners. Example 14 is the same as that shown in Table 3 above, and Example 22 is the same as that shown in Table 7 above.

<Cleansing power when mixed with water (target: lip color)>
The cleaning rates (%) when 40 to 100% by mass of water was added to 100% by mass of each cleansing agent of Example 22, Comparative Example 35, and Comparative Example 37 are shown in Figure 1. It should be noted that Example 14 and Comparative Example 36 were not tested.
In Example 22, the amount of oil in component (C) and the amount of surfactant (the total amount of components (A) and (B)) were smaller than the amounts of oil in component (C) and surfactant in the compositions of Comparative Examples 35 and 37, but even when water was mixed in, the cleansing performance was equivalent to that of Comparative Example 35. Moreover, in Comparative Example 37, a significant decrease in cleansing performance was observed due to the inclusion of water.

<Cleansing power evaluation (cleaning targets: waterproof eyeliner, film-type mascara)>
(1) Evaluation of cleansing power against waterproof eyeliner FIG. 2 shows the results of evaluation of the cleansing agents having the compositions of Examples 14, 22, and Comparative Examples 35 to 37 against a waterproof eyeliner.
As shown in Figure 2, the cleansing agents of Examples 14 and 22 showed a strong cleaning effect against an oil-based waterproof eyeliner, even though the amount of oil in component (C) and the amount of surfactant (the total amount of components (A) and (B)) were less than those in component (C) of Comparative Examples 35, 36, and 37. This cleaning effect had a cleansing performance equal to or greater than that of the oil-based cleansing agents of Comparative Examples 35 to 37.

(2) Evaluation of Cleansing Power Against Film-Type Mascara FIG. 3 shows the results of an evaluation of the cleansing power of the cleansing agents having the compositions of Examples 14, 22, and Comparative Examples 35 to 37 against film-type mascara.
Examples 14 and 22 of the present invention showed a strong cleansing effect against film-type mascara that forms a film. On the other hand, Comparative Examples 35 to 37, which are conventional oil-based cleansing agents, showed extremely weak cleansing power against film-type mascara. Example 14 contained 35% by mass of water, and Example 22 contained 30% by mass of water, and it is believed that the composition of the present invention ((A)+(B)+(C)+(D)+(E)) provided a strong cleansing power against film-type mascara.

<Wash-off performance (volume-based average diameter)>
The volume-based average diameter measurement results of the emulsion particles of the 0.1 mass % aqueous solutions of the cleansing agents of Examples 14, 22, Comparative Examples 35, 36, and 37 are shown in Table 10 below. The volume-based average diameter measurements of Examples 14, 22, Comparative Examples 35, and 36, excluding Comparative Example 37 which had a very large volume-based average diameter measurement value of 11,438 nm, are graphed and shown in Figure 4.

4, the emulsion particle size (volume-based average diameter) of all the emulsions was 300 nm or less, which can be evaluated as a level that can be quickly and cleanly washed off, except for Comparative Example 37, which had an emulsion particle size (volume-based average diameter) of 11,438 nm. Of these, Examples 14 and 22 had emulsion particle sizes (volume-based average diameter) of 100 nm or less, which were very fine particle sizes compared to Comparative Examples 35 to 37, and were judged to be able to be washed off even more quickly.
Since the emulsion particle sizes (volume-based average size) of Examples 1 to 32 described above were generally 100 nm or less, with a maximum of 140.9 nm (Example 23), it can be determined that the cleansing agent having the configuration of the present invention has superior wash-off properties compared to general oil-based cleansing agents.

As described above, in tests based on actual use, the cleansing agent of the present invention had water resistance equivalent to that of conventional water-resistant cleansing oils, and had cleansing performance equivalent to that of conventional cleansing oils against lip colors, which are typical oil-based makeup cosmetics (Example 22 and Comparative Example 35 in FIG. 1).
In addition, the cleansing agent of the present invention had a cleansing performance equal to or greater than that of conventional cleansing oils for waterproof cosmetics (e.g., waterproof eyeliner), which are considered difficult to remove with general oil-based cleansing agents (Figure 2).Furthermore, it was revealed that the cleansing agent of the present invention had a high cleansing performance for film-type mascara, which is considered difficult to remove with conventional cleansing oils (Figure 3).
Furthermore, it is clear from the results of measuring the volume-based average diameter that the cleansing agent having the composition of the present invention is easy to wash off after cleansing (Table 10, FIG. 4).

There are many different types of makeup products available on the market, and the choice is left to the consumer's preference.
Since the transparent cleansing agent having the configuration of the present invention contains water in a stable manner in advance, it is possible to always obtain a stable and excellent cleansing effect no matter what type of makeup cosmetic the consumer selects to use and no matter what situation the consumer uses (bathroom where there is a high risk of water contamination/indoors where there is no risk of water contamination) in which they perform the cleansing action (makeup removal).
In the prior art, for example, when it is difficult to remove eye makeup, a consumer must use a dedicated cleansing agent to remove the makeup, and then use a different cleansing agent to remove the entire face, which is a cumbersome procedure. In other words, it is common for consumers to have multiple cleansing agents according to the types of makeup they prefer. However, with a cleansing agent having the configuration of the present invention, it is possible to remove different types of makeup with a single cleansing agent. This effect has not been considered in the prior art cleansing agents, and the present invention, which has achieved this effect, is revolutionary.
Next, Examples 33 to 36 are shown, which contain optional ingredients (cyanocobalamin and (chlorophyllin/copper) complexes with coloring effects, BG, other surfactants, and rosemary extract, a moisturizing ingredient), and ingredient (C) (orange peel oil, rosemary leaf oil), which also serves to add fragrance to the product. The units are % by mass. The products were prepared by the usual method.

As shown in Examples 33 to 36 in Table 11, the cleansing products having the composition of the present invention were transparent and temperature stable. In addition, the emulsion particle size (volume-based average diameter) was 300 nm or less, which is generally considered to be a level that can be quickly and cleanly washed off. When the cleansing products of Examples 33 to 36 were given to 20 female monitors and used in a home use test, there was no dissatisfaction with the cleansing power, and the comments section was very positive, with comments such as film-type mascara, waterproof-type eyeliner, foundation, and lipstick all being removed well.

<Evaluation of cleansing power (evaluation of ease of removing makeup stains by sensory testing)>
A trained sensory evaluator actually used and evaluated the cleansing agents of Example 1 (Table 1), Examples 17 to 19 (Table 5), Examples 27 to 32 (Table 8), and Examples 33 to 36 (Table 11). That is, the sensory evaluator applied makeup using the cosmetic agent to be cleaned, and one hour later, removed the makeup indoors using the cleansing agent to be evaluated and his/her fingers. After rinsing with water, the evaluator lightly wiped off the water droplets with a towel, and visually observed the degree to which the makeup stains had been removed.
The cosmetics used were as follows:
Lipstick (lip color): Moisture Rouge P #84 Velvet Red
(Manufactured by Fancl Corporation)
Waterproof eyeliner: Masterliner
Creamy Pencil BK-1
(Maybelline New York)
Film type mascara: Perfect Mascara R21
(Manufactured by Attenir Co., Ltd.)
(Evaluation criteria)
○: Makeup stains are almost completely removed. △: A small amount of makeup stains remain. ×: Makeup stains are clearly remaining.

The results of the cleansing evaluation based on the sensory evaluation are shown in the lower part of Table 12. Table 12 also shows the results of each evaluation item already described.

(result)
All of the cleansing agents of Example 1 (Table 1), Examples 17 to 19 (Table 5), Examples 27 to 32 (Table 8), and Examples 33 to 36 (Table 11) were rated as "○", confirming that they removed makeup stains almost completely.

The cleansing agents (Examples 37 to 49, Comparative Examples 38 and 39) with the compositions shown in Table 13 were prepared by standard methods and evaluated in the same manner. The results are shown in the lower section.

<Appearance observation (transparency)>
(a) Appearance immediately after preparation The cleansing agents of Examples 37 to 49 all had a transparent appearance. The cleansing agent of Comparative Example 38 was also transparent. On the other hand, the cleansing agent of Comparative Example 39 had a cloudy and opaque appearance immediately after preparation. Stability tests were performed on the samples of Examples 37 to 49 and Comparative Example 38 by storing them in thermostatic chambers at 5°C, 25°C, 40°C, and 50°C.

(b) Appearance after stability test (stability)
The cleansing agents of Examples 37 to 49 and Comparative Example 38 were stored in thermostatic chambers at 5°C, 25°C, 40°C, and 50°C for one month and then removed and evaluated for transparency. All of them maintained their transparency.

<Wash-off performance (measurement of volume-based average diameter of emulsion particles)>
The volume-based average diameters of the emulsion particle sizes measured for the cleansing agents of Examples 37 to 49 and the cleansing agent of Comparative Example 38 are shown in Table 13. Three of the 13 Examples (Examples 40, 43, and 47) were evaluated as "if the emulsion particle size is 100 nm or less, it can be washed off more quickly and thoroughly." The remaining seven Examples (Examples 41, 42, 44, 45, 46, 48, and 49) and Comparative Example 14 also showed volume-based average diameters of emulsion particles that were evaluated as "if the emulsion particle size is 101 to 300 nm, it can be washed off more quickly and thoroughly."

<Ease of rinsing (sensory evaluation)>
The evaluation results by the sensory evaluators are shown in Table 13.
All of the cleansing agents of Examples 37 to 49 and Comparative Example 38 were rated as "◯: no oily feeling was left on the skin and easy to rinse off." The results of the ease of rinsing off (sensory evaluation) were consistent with the judgment of the volume-based average diameter measurement results.

<Evaluation of cleansing power (evaluation of ease of removing makeup stains by sensory evaluation)>
The evaluation results for ease of removal of lipstick, waterproof eyeliner, and film-type mascara are shown in Table 13.
All of the cleansing agents of Examples 37 to 49 were rated as "○", and it was confirmed that they almost completely removed makeup stains. However, the cleansing agent of Comparative Example 38 was unable to remove film-type mascara stains, and this test was rated as "×".

From the above test results, the following conclusions could be drawn:
In other words, since the cleansing agent of Comparative Example 38 was unable to remove film-type mascara, it was found that in order to remove film-type mascara stains, the content of water as component (E) needs to exceed 10% by mass.
In addition, since the product of Comparative Example 39 became cloudy immediately after preparation, it was considered that in order to prevent the cleansing agent from becoming cloudy, the content of water, which is component (E), must be less than 50 mass%.
On the other hand, since Examples 37 to 49 were transparent immediately after preparation and remained transparent after the storage test, and the ease of rinsing and the cleaning effect were rated as "good" in the sensory evaluation, it was considered that this was due to the effect of the water content of component (E) being in the range of 15 to 44.99 mass%.

Claims (4)

A transparent cleansing agent containing the following ingredients (A) to (E):
(A) a diester of a branched fatty acid and/or an unsaturated fatty acid having 14 to 22 carbon atoms and a polyglycerin; (B) an ester of a straight-chain fatty acid having 6 to 10 carbon atoms and a polyglycerin, in which the ratio of the degree of polyglycerin polymerization to the number of bonded residues of fatty acid per molecule (degree of polyglycerin polymerization/number of bonded residues of fatty acid) is 2.5 to 3.5; (C) an oil; (D) one or more selected from glycerin, diglycerin, polyglycerin-3, polyglycerin-4, polyglycerin-5, polyglycerin-6 and polyglycerin-10; (E) 15 to 45 % by mass of water based on the total amount of the cleansing agent (excluding those containing 20 to 45% by mass of water based on the total amount of the cleansing agent). The transparent cleansing agent according to claim 1, wherein component (B) is one or more selected from triglyceryl caprylate, pentaglyceryl dicaprylate, eicosaglyceryl hexacaprylate, eicosaglyceryl hexacaprate, triglyceryl caprate, hexaglyceryl dicaprylate, and hexaglyceryl dicaprate. The transparent cleansing agent according to claim 1 or 2, in which the total content of components (A) and (B) is 5 to 30% by mass based on the total amount of the cleansing agent, and the mass ratio of (A) to (B) ((A)/(B)) is 4/1 to 1/3. The transparent cleansing agent according to any one of claims 1 to 3, containing 20 to 50 mass % of component (C) based on the total amount of the cleansing agent.

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