Skin cleansing agent composition

Abstract

To provide a skin cleansing composition that has high cleansing power, shows superior temperature stability, does not make the skin sticky after use, can freely cleanse both small and large areas, and ensures user friendliness.SOLUTION: A skin cleansing composition herein is a water-based liquid composition and is accommodated in a spray container (Z). This composition contains following components (A), (B), (C) and (D): (A) 2-20 mass% of a water-soluble nonionic surfactant, containing 50 mass% or more of at least one of specific nonionic surfactants with an HLB of 13 or more; (B) at least one compound selected from (b1) phenoxy ethanol 0.3-1 mass%, (b2) methyl paraben 0.1-0.4 mass%, and (b3) ethyl paraben 0.05-0.2 mass%; (C) at least one compound selected from (c1) 1,3-butyleneglycol, (c2) dipropyleneglycol, and (c3) ethanol; and (D) water. A mass ratio of the component (A) to the component (B), (A) / (B), is 5 or more.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to a skin cleansing composition.

Background Art

[0002] Conventionally, there have been several problems with the act of picking up a low-viscosity cleanser such as lotion and applying it to the skin. Since the viscosity is low, it spills and stains the surroundings before it can be applied after being picked up. In addition, it cannot be uniformly applied over a large area, and dirt cannot be uniformly removed. To address these issues, conventionally, a method has been used in which a carrier such as a sheet or cotton is first impregnated and then wiped off. In addition, formulation has been carried out such as foaming or providing shape retention with polymers. For example, Patent Document 1 describes a cleansing sheet in which a cleansing composition containing water, a nonionic surfactant, polyaminopropylguanidine, and a polyhydric alcohol and containing no ethanol or containing ethanol at 5% by mass or less is impregnated into a sheet base material, and has a high cleansing power against foundation and excellent antiseptic power.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In recent years, products such as foundation and sunscreen are required to have a performance in which their effects last for a long time, and technological development has been carried out to form a coating film with high water and sebum resistance. These technical concepts are common, and by blending a film-forming polymer typified by trimethylsiloxysilicate (TMS) in the formulation, a tough coating film with high water and oil repellency is formed after application. Because these film-forming polymers are oil-soluble, once they form a film on the skin, they become difficult to remove with water-based cleansers such as facial washes. Therefore, it is generally recommended to remove them with oil-based cleansers. However, cleansers that use oil as a cleansing base often leave a greasy feeling, making them difficult to rinse off and leaving a sticky residue even after rinsing.

[0005] In real life, foundation and sunscreen aren't only applied to the face. Difficult-to-remove residue exists on the hands and body as well, such as foundation temporarily applied to the back of the hand during makeup application, or sunscreen applied to the neck and arms. Hair wax left on the hands after styling is also recognized as a type of residue that's hard to remove. In particular, until recently, it wasn't common to routinely apply waterproof sunscreen containing film-forming ingredients that are difficult to remove to large areas of the body. However, with the increasing awareness of climate change and the harmful effects of ultraviolet rays, the habit of applying sunscreen when going outside has become established among both adults and children. Especially with rising temperatures, there is a growing demand for long-lasting, water-resistant formulations that do not wash off with sweat, and complaints about how difficult these products are to remove are increasing.

[0006] Under these circumstances, the only cleansing agents that can be used on hands and bodies are common cleansers such as body wash and hand soap. Because these are primarily formulated with anionic surfactants, they do not have sufficient cleansing power to remove long-lasting foundations and sunscreens. On the other hand, oil-type cleansers leave a greasy feeling during and after use, making them unsuitable for use on areas other than the face. Furthermore, conventional cleansers have the limitation that they can only be used wherever they can be rinsed off with water. Therefore, for example, a cleansing sheet impregnated with the above-mentioned water-based cleansing composition could be used to cleanse the hands and body, in addition to the face.

[0007] However, conventional water-based cleansing compositions have not been able to exhibit sufficient cleansing power against foundations and other products that form a film. Furthermore, considering situations in daily life where stubborn dirt can accumulate on the body, using a sheet to remove foundation from fingertips during makeup application is uneconomical, as one sheet would be needed even for that purpose. Conversely, using cotton pads would require multiple sheets to remove sunscreen from large areas of the body, such as the arms, which is inconvenient. While using cleaning solutions by impregnating sheets or cotton pads is convenient and easy, it's difficult to consider this a rational product form when thinking about body cleaning applications, where the usage scenarios and the size of the area vary. On the other hand, thickened formulations that are not used by impregnating them with sheets or cotton have drawbacks such as not spreading over a large area, leaving a sticky feeling on the skin and making users want to wash it off. Thus, the inventors discovered a latent need for a product that doesn't leave a slimy feeling and can easily and effectively remove stubborn dirt from hands and bodies with just one product. [Means for solving the problem]

[0008] The inventors have discovered that by combining a specific nonionic surfactant with an HLB of 13 or higher with a specific preservative compound, they can provide a water-based skin cleansing composition that exhibits (specifically) a high cleansing effect on long-lasting foundations and sunscreens, maintains temperature stability suitable for practical use, and provides a good skin feel after use. Furthermore, they have found that by housing this skin cleansing composition in a spray bottle, it can be used to cleanse areas ranging from small to large areas, such as fingertips, arms, and the body, efficiently and easily, making it very convenient to use.

[0009] The present invention comprises the following components (A), (B), (C), and (D): (A) 2-20% by mass of a water-soluble nonionic surfactant containing 50% by mass or more of one or more nonionic surfactants with an HLB of 13 or higher selected from (a1), (a2), and (a3), (a1) Polyoxyethylene laurate ester, (a2) Polyoxyethylene (caprylic / capric acid) glyceryl, (a3) Polyoxyethylene coconut oil fatty acid glyceryl, (B) One or more compounds selected from (b1), (b2), and (b3), (b1) Phenoxyethanol 0.3-1% by mass, (b2) Methylparaben 0.1-0.4% by mass, (b3) Ethylparaben 0.05-0.2% by mass, (C) One or more compounds selected from (c1), (c2), and (c3), (c1) 1,3-butylene glycol, (c2) Dipropylene glycol, (c3) Ethanol, (D)Water It contains, A water-based liquid composition in which the mass ratio (A) / (B) of component (A) to component (B) is 5 or more, (Z) The present invention relates to a skin cleansing composition contained in a spray container.

[0010] The present invention also relates to a method for cleansing the skin, wherein the skin cleansing composition is sprayed onto the skin and then wiped off or washed away. Furthermore, the present invention relates to a method of cleansing the skin, wherein the skin cleansing composition is sprayed onto the skin, allowed to penetrate, and then wiped off or washed away.

[0011] Furthermore, the present invention comprises the following components (A), (B), (C), and (D): (A) 2-20% by mass of a water-soluble nonionic surfactant containing 50% by mass or more of one or more nonionic surfactants with an HLB of 13 or higher selected from (a1), (a2), and (a3), (a1) Polyoxyethylene laurate ester, (a2) Polyoxyethylene (caprylic / capric acid) glyceryl, (a3) Polyoxyethylene coconut oil fatty acid glyceryl, (B) One or more compounds selected from (b1), (b2), and (b3), (b1) Phenoxyethanol 0.3 to 1% by mass, (b2) Methylparaben 0.1 to 0.4% by mass in the composition, (b3) Ethylparaben 0.05 to 0.2% by mass in the composition, (C) One or more compounds selected from (c1), (c2) and (c3), (c1) 1,3-Butylene glycol, (c2) Dipropylene glycol, (c3) Ethanol, (D) Water A water-based liquid composition containing the above components, and having a mass ratio (A) / (B) of component (A) to component (B) of 5 or more, (Z) A spray container containing the above composition, Relates to an article for skin cleansing.

Advantages of the Invention

[0012] The skin cleansing composition of the present invention can be used without leaving any residue on highly persistent foundation, sunscreen, etc. (film-forming dirt) containing a film-forming component, has a high detergency (removal potential), and has good temperature stability. Further, by being housed in a spray container and directly sprayed onto the skin for use, it can be sprayed (applied) freely and uniformly from the fingertips to the whole body, and can be efficiently cleaned, and is easy to use.

[0013] In the present invention, the removal potential refers to, for example, the removal performance when a highly persistent makeup cosmetic applied on a model substrate of pseudo-skin in an example is removed by applying a predetermined physical force under certain physical conditions. It is calculated as the removal rate from the color difference measurement before and after cleaning the makeup cosmetic on the model substrate. Also, in that example, those with a removal rate of 50% or more are considered to have a removal potential. Furthermore, good temperature stability means that, because the formulation of the present invention is an aqueous solution based on a nonionic surfactant, it has sufficient temperature stability to avoid reaching the cloud point under the summer temperature conditions in which sunscreen products are used. Specifically, this means that the cloud point is observed to be 45°C or higher, preferably 50°C or higher. [Modes for carrying out the invention]

[0014] Component (A) is a water-soluble nonionic surfactant, containing 50% by mass or more of one or more nonionic surfactants with an HLB of 13 or higher selected from components (a1), (a2), and (a3). (a1) Polyoxyethylene laurate ester, (a2) Polyoxyethylene (caprylic / capric acid) glyceryl, (a3) Polyoxyethylene coconut oil fatty acid glyceryl. Here, a water-soluble nonionic surfactant refers to a nonionic surfactant with an HLB of 10 or higher that dissolves transparently and uniformly in water at a concentration of 20% by mass at 25°C, either alone or in combination. Furthermore, HLB is an index indicating the hydrophilic-lipophilic balance, and in this specification, it is determined by the following formula by Griffin.

[0015]

number

[0016] Components (a1), (a2), and (a3) ​​are hydrophilic nonionic surfactants of a specific structure that work to remove makeup cosmetics with enhanced durability. Therefore, it is preferable that components (a1), (a2), and (a3) ​​have a certain degree of cleaning and removal potential on their own, and when combined with component (B), a clear improvement in the potential to remove film-forming stains is observed. The nonionic surfactants of components (a1), (a2), and (a3) ​​have an HLB of 13 or higher, preferably 14 or higher, in order to ensure water solubility.

[0017] From the viewpoint of achieving an HLB of 13 or higher, the average number of added moles of polyoxyethylene (POE) groups in components (a1), (a2), and (a3) ​​is preferably 9 moles or more for (a1), 6 moles or more for (a2), and 7 moles or more for (a3). From the viewpoint of the makeup removal potential exhibited by components (a1), (a2), and (a3) ​​individually, it is preferably 30 moles or less for (a1), 20 moles or less for (a2), and 40 moles or less for (a3), and more preferably 20 moles or less for (a1), 10 moles or less for (a2), and 20 moles or less for (a3). Specifically, (a1) is preferably POE(12) monolaurate, (a2) is preferably POE(6) (caprylic / capric acid) glyceryl and POE(7) (caprylic / capric acid) glyceryl, and (a3) ​​is preferably POE(7) coconut oil fatty acid glyceryl and POE(8) coconut oil fatty acid glyceryl.

[0018] In the present invention, component (A) may include a water-soluble nonionic surfactant having a structure other than components (a1), (a2), and (a3). The water-soluble nonionic surfactant other than components (a1), (a2), and (a3) ​​is preferably one with an HLB of 10 or higher, selected from POE glycerin fatty acid esters, POE fatty acid esters, POE sorbitan fatty acid esters, alkyl glucosides, polyglycerin fatty acid esters, POE hydrogenated castor oil, POE sorbitol fatty acid esters, etc. Since these water-soluble nonionic surfactants are unfavorable in terms of cleansing power, component (A) contains 50% by mass or more of one or more nonionic surfactants with an HLB of 13 or higher selected from components (a1), (a2), and (a3). If component (A) contains water-soluble nonionic surfactants other than components (a1), (a2), and (a3), from the viewpoint of maintaining cleansing power for long-lasting foundations and sunscreen formulations, the mass ratio of components (a1), (a2), and (a3) ​​to the total water-soluble nonionic surfactants of component (A) is 50% by mass or more, and preferably 65% ​​by mass or more.

[0019] The content of the water-soluble nonionic surfactant in component (A) is preferably 2% by mass or more, more preferably 3% by mass or more, and more preferably 4% by mass or more, from the viewpoint of temperature stability when combined with component (B). From the viewpoint of not feeling sticky during use and maintaining viscosity that allows for atomization from a spray container at low temperatures (5°C), the content is preferably 20% by mass or less, more preferably 15% by mass or less, and more preferably 10% by mass or less, from the viewpoint of not feeling sticky during use and maintaining viscosity that allows for atomization from a spray container. Furthermore, the content of component (A) is preferably 2 to 20% by mass, more preferably 3 to 15% by mass, and more preferably 4 to 10% by mass, in the total composition.

[0020] Component (B) is one or more compounds selected from (b1), (b2), and (b3). (b1) Phenoxyethanol, (b2) Methylparaben, (b3) Ethylparaben. Compound (B) is a component commonly used as a preservative, but when used in combination with component (A), it enhances the cleaning power against film-forming dirt.

[0021] As component (B), (b1) the content of phenoxyethanol is preferably 0.3% by mass or more, and preferably 0.4% by mass or more, from the viewpoint of cleansing power, and preferably 1% by mass or less, and preferably 0.8% by mass or less, from the viewpoint of skin irritation. (b2) The content of methylparaben is preferably 0.1% by mass or more, and preferably 0.2% by mass or more, from the viewpoint of cleansing power, and preferably 0.4% by mass or less, and preferably 0.3% by mass or less, from the viewpoint of skin irritation. (b3) The content of ethylparaben is preferably 0.05% by mass or more, and preferably 0.1% by mass or more, from the viewpoint of cleansing power, and preferably 0.2% by mass or less, from the viewpoint of skin irritation.

[0022] From the standpoint of its inherent preservative effect, component (B) is preferably used in combination, and it is more preferable to combine (b1) with one or more selected from (b2) and (b3). The total content of component (B), (b1) + (b2) + (b3), is preferably 0.2% by mass or more, more preferably 0.3% by mass or more, from the viewpoint of extracting cleansing power, and preferably 1% by mass or less, more preferably 0.8% by mass or less, from the viewpoint of skin irritation. Furthermore, the mass ratio of (b1) to the total amount of (b2) and (b3), (b1) / ((b2)+(b3)), is preferably 0.5 or more, more preferably 1 or more, preferably 5 or less, and most preferably 4 or less, from the viewpoint of cleaning power.

[0023] In the present invention, the mass ratio of component (A) to component (B), (A) / (B), is 5 or more, and preferably 10 or more, from the viewpoint of maintaining the cloud point at 45°C or higher.

[0024] Component (C) is one or more compounds selected from (c1), (c2), and (c3). (c1) 1,3-butylene glycol, (c2) Dipropylene glycol, (c3) Ethanol. The compound of component (C) is used to adjust the feel of the product, such as moisturizing or cooling sensations, but in the present invention, it has the function of promoting the dissolution of components (A) and (B) and raising the cloud point.

[0025] Furthermore, when used by wiping, it is preferable to use (c3) ethanol in combination with (c1) or (c2) from the viewpoint of not leaving any stickiness after use. The mass ratio of (c3) to the total amount of (c1) and (c2), (c3) / ((c1)+(c2)), is preferably 0.5 or more from the viewpoint of suppressing stickiness after use.

[0026] Component (C) can be used alone or in combination of two or more types. From the viewpoint of promoting the dissolution of components (A) and (B) and raising the cloud point, the content is preferably 3% by mass or more, more preferably 5% by mass or more, and still more preferably 7% by mass or more in the total composition. Furthermore, from the viewpoint of preventing the skin from becoming sticky after use when wiped, it is preferably 20% by mass or less, and more preferably 15% by mass or less. In addition, the content of component (C) is preferably 3 to 20% by mass, more preferably 5 to 15% by mass, and still more preferably 7 to 15% by mass in the total composition.

[0027] Component (D), water, acts as a solvent for components (A) to (C), and is also used to adjust the feel and viscosity. The content of component (D) is preferably 70% by mass or more, more preferably 80% by mass or more, preferably 95% by mass or less, and more preferably 90% by mass or less, from the viewpoint of not feeling sticky during use, not feeling sticky after wiping, and adjusting the viscosity for filling into a spray container and atomizing. Furthermore, the water content of component (D) is preferably 70 to 95% by mass, and more preferably 80 to 90% by mass, from the viewpoint of not feeling sticky during use, not feeling sticky after wiping, and adjusting the viscosity for filling into a spray container and atomizing.

[0028] The skin cleansing composition of the present invention may further contain a nonionic surfactant with an (E)HLB of less than 10 for the purpose of enhancing its cleansing power. Examples of nonionic surfactants with an HLB of less than 10 in component (E) include polyoxyethylene fatty acid esters, polyoxyethylene glycerin fatty acid esters, polyglycerin fatty acid esters, sorbitan fatty acid esters, polyoxyethylene sorbitol fatty acid esters, polyoxyethylene hydrogenated castor oil, polyoxyethylene alkyl ethers, alkyl glyceryl ethers, and monoglycerin fatty acid esters.

[0029] The nonionic surfactant of component (E) is preferably lipophilic with an HLB of 8 or less, from the viewpoint of improving cleaning power, and examples include monoesters of oleic acid, stearic acid or isostearic acid with glycerin or diglycerin, or monoethers of oleyl alcohol, stearyl alcohol or isostearyl alcohol with glycerin or diglycerin. Also, examples include POE monomyristate, POE monolaurate, POE glycerin monooleate, POE glycerin monostearate, POE glycerin monoisostearate, etc., which have an average number of added moles of POE groups of 1 to 5, and further, sorbitan monostearate, sorbitan monooleate, sorbitan monoisostearate, etc. In particular, from the viewpoint of ensuring low-temperature stability, monoesters of oleic acid or isostearic acid with glycerin or diglycerin, monoethers of oleyl alcohol or isostearyl alcohol with glycerin or diglycerin, POE monolaurate esters or POE glycerin monooleate esters or POE glycerin monoisostearate esters having POE groups with an average addition number of 1 to 5 moles, and sorbitan monooleate and sorbitan monoisostearate are preferably used.

[0030] Component (E), like component (B), improves the cleansing power of long-lasting foundations and sunscreen formulations when combined with component (A). However, because it is lipophilic, depending on the combination, association may progress, leading to an increase in the viscosity of the system and a decrease in the cloud point. For this reason, the mass ratio of (A) to component (E), (A) / (E), is preferably 5 or more, and more preferably 6 or more. Furthermore, the total content of components (A) and (E) is preferably 20% by mass or less, and more preferably 15% by mass or less, in the total composition, from the viewpoint of preventing stickiness during use and maintaining viscosity that allows for atomization from a spray container at low temperatures (5°C).

[0031] The skin cleansing composition of the present invention may further contain components used in ordinary cleansing compositions in addition to the above-mentioned components. Examples include polyols other than those mentioned above, surfactants other than those mentioned above; aromatic alcohols such as benzyl alcohol and benzyloxyethanol; cellosolves such as ethyl cellosolve and butyl cellosolve; carbitols such as ethyl carbitol and butyl carbitol; moisturizing ingredients such as sugars (derivatives), amino acids (derivatives), animal and plant (protein) derivatives, and animal and plant extracts; silicone derivatives such as polyoxyalkylene-modified silicones; polymer compounds; inorganic or organic salts such as sodium sulfate, sodium carbonate, sodium bicarbonate, potassium chloride, sodium chloride, and sodium citrate; pH adjusters such as acids and alkalis; anti-inflammatory agents such as glycyrrhetinic acid, glycyrrhizic acid and their derivatives; bactericidal agents such as isopropylmethylphenol; preservatives, metal ion chelating agents, antioxidants, ultraviolet absorbers, fragrances, vitamins, natural pigments, tar dyes, and other colorants.

[0032] In the skin cleansing composition of the present invention, an aqueous liquid composition containing the above components (A) to (D) can be produced by measuring out the components other than water from component (D), heating and stirring them to 60°C, and then cooling them while gradually adding water.

[0033] The viscosity of the aqueous liquid composition is preferably 20 mPa·s or less, more preferably 15 mPa·s or less, and even more preferably 10 mPa·s or less, considering usability over a wide range of living temperatures and from the viewpoint of dispensing it as a mist from the spray container. In this invention, viscosity is measured using a Type B viscometer (TVB-10M viscometer, manufactured by Toki Sangyo Co., Ltd.), and viscosity less than 100 mPa·s is measured with rotor No. M1 (rotation speed) at 60 rpm for a measurement time of 1 minute.

[0034] The skin cleansing composition of the present invention is a clear, mono-liquid phase at 25°C. Here, a clear, mono-liquid phase means having a transparent appearance without separation, and that each component is uniformly mutually dissolved. In such a state, the removal potential is high. Furthermore, when surfactants form a higher-order association structure, the appearance may become semi-transparent; however, this is also considered a single-phase system. If the system separates into two phases, the appearance will become cloudy white or a two-layered state, making it difficult to obtain the above-mentioned properties as designed.

[0035] In the present invention, an aqueous liquid composition containing components (A) to (D) is contained in a spray container and used by spraying it directly onto the skin, allowing for easy and uniform spraying (application) of cleansing areas ranging from small to large.

[0036] Any spray container capable of dispensing the skin cleansing composition in the form of foam, mist, or fine droplets is acceptable. Examples include trigger-type spray containers (with trigger-type dispenser devices), pump-type spray containers (with pump-type dispenser devices), and aerosols. Of these, trigger-type spray containers are preferred from the viewpoint of general consumer recognition, ease of use, cost-effectiveness, and environmental compatibility. From the viewpoint of the spread of the discharged liquid and the discharge efficiency, the spray nozzle of the spray container is preferably 0.2 to 0.5 mm in diameter, and more preferably 0.3 to 0.45 mm.

[0037] Furthermore, the spray container is preferably a mist-dispensing type spray container (mist container), and from the viewpoint of applying the product to the target area without excess or deficiency, the amount dispensed per spray is preferably 0.2 to 0.7 mL, and more preferably 0.3 to 0.6 mL.

[0038] When considering the use of the skin cleansing composition of the present invention by spraying it onto the arm, it is preferable that the spread of the liquid (composition) when sprayed from a distance of 12 cm be 10 cm or less in diameter. If it is larger than that, a large amount of liquid will splatter off target, making a mess. Also, when the amount sufficient for use on one arm is 2 g, it is preferable that the number of sprays be 10 or less. If it is more than that, it will actually become more troublesome. Furthermore, in usage situations where the liquid must be dispensed multiple times, rapid and continuous spraying is expected. In such cases, the trigger or pump of the spray container will be pressed only partially. Considering this situation, if we define the discharge efficiency as the ratio of the amount of liquid dispensed (per dispensed) to the amount of liquid that should ideally be dispensed (per dispensed) when dispensed quickly (5 dispenses in 2 seconds), then it is preferable that the discharge efficiency be 50% or higher. An efficiency of less than 50% means that the pressing pressure is too high, the return is slow, the trigger is only pulled partially, or the pump is not pressed at all. Such behavior is inefficient, feels heavy to the user, and is undesirable.

[0039] The skin cleansing composition of the present invention is contained in a spray container and can be used by spraying it directly onto the skin and wiping it off or rinsing it away. Alternatively, it can be sprayed directly onto the skin, allowed to absorb, and then wiped off or rinsed away. In particular, wiping off the skin cleansing composition with tissue paper or a paper towel after it has been absorbed is preferred because it effectively removes dirt without wasting the cleansing solution.

[0040] When applying a low-viscosity cleansing agent composition to the skin, it is common practice to impregnate a carrier such as a sheet or cotton beforehand. However, in this case, the carrier itself also retains some of the liquid, which reduces the amount of liquid that actually works to remove dirt. However, in the present invention, where the product is contained in a spray container and sprayed directly onto the skin to blend with the dirt before being wiped off, the low-viscosity liquid easily penetrates into the gaps between fine irregularities, while the liquid acts directly on the dirt, resulting in no waste. Furthermore, after blending, the lifted dirt is wiped away, providing high cleaning performance. On the other hand, while the method of impregnating sheets or cotton pads and wiping is useful for thoroughly cleaning surfaces with a consistent surface area and large irregularities, such as the face, the present invention is preferably applied in situations such as removing foundation applied to the fingertips or removing sunscreen applied to flat, large areas of the body, such as the arms and neck. Therefore, when using the same product for both situations, the priority is to achieve high cleaning power efficiently and without waste. From this perspective, a method that allows for easy adjustment of the amount of liquid sprayed is also useful for consumers.

[0041] Furthermore, the skin cleansing composition of the present invention can also be used by spraying it onto a sheet or cosmetic cotton pad, impregnating it with the composition, and then applying it to the skin to wipe off makeup, etc. The skin cleansing composition of the present invention can be used to cleanse the skin by spraying it onto the skin and then wiping it off or rinsing it away. Furthermore, the skin cleansing composition of the present invention can be used to cleanse the skin by spraying it onto the skin, allowing it to absorb, and then wiping it off or rinsing it away. [Examples]

[0042] Example A, Comparative Example A Skin cleansing compositions with the compositions shown in Table 1 were prepared, and their removal potential, non-greasy feel during use, and appearance were evaluated when used with Foundation A containing a film-forming polymer or Foundation B without such a polymer. The results are also shown in Table 1. In the table of examples, the content of each component indicates the active amount.

[0043] (Manufacturing method) The components of component (D), excluding water, were measured out, heated to 60°C, stirred and mixed, and then cooled while gradually adding water to produce a skin cleansing agent composition.

[0044] (Evaluation method) (1) Removal potential: On a 7cm x 12cm white artificial leather sheet (Okamoto Chemical Co., Ltd., Laforet White), foundation was applied evenly to a 5cm x 10cm area using a finger, with an amount of 0.04-0.05g, and then allowed to dry for more than 2 hours. After that, the artificial leather sheet was placed on an electronic balance, and three drops (0.06-0.07g) of each skin cleansing agent composition were placed on a 1.5cm square cotton piece. Using one finger, applying enough pressure to apply 100g to the cotton piece, the foundation-applied surface was wiped slowly twice in a straight line, then flipped over and wiped once. Using a colorimeter, the color difference (L, a, b) of white artificial leather sheets was measured at three locations: before foundation application, after foundation application, and after wiping and cleaning. The cleaning and removal rate was calculated, and the average value was determined. For the foundation used, Revlon ColorStay Makeup N, shade 370 was used as an example containing a film-forming polymer, while Maybelline Fit Me Foundation, shade 220, was used as an example not containing such a polymer.

[0045] (2) No stickiness during use: Five expert panelists performed a sensory evaluation of the lack of stickiness when 1 mL of each skin cleansing agent composition was spread on the forearm, and the results are shown according to the following criteria. 5; All 5 people rated it as not slimy or slightly slimy. 4 out of 5 people rated it as not slimy or not slimy at all. 3 out of 5 people rated it as not slimy or not slimy at all. 2 out of 5 people rated it as not slimy or not slimy at all. 1. Less than 1 out of 5 people rated it as not slippery or not very slippery.

[0046] (3) Appearance: Each skin cleansing agent composition (20 mL) was placed in a screw-top tube and left in a constant temperature bath at 45°C or 50°C for at least one hour. After that, the appearance was observed visually and the following criteria were used. T; Transparent. C; Opacity or two-layer separation.

[0047] [Table 1]

[0048] As shown in Table 1, the skin cleansing composition of Example A, which contains component (B), exhibited a high cleansing effect against Foundation A, which contains a film-forming polymer, whereas Comparative Example A, which does not contain component (B), did not show a sufficient cleansing effect. On the other hand, both compositions exhibited a high cleansing effect against Foundation B, which does not contain a film-forming polymer.

[0049] Examples 1-14, Comparative Examples 1-8 In the same manner as in Example A, skin cleansing compositions with the compositions shown in Tables 2 to 4 were prepared, and their removal potential, non-stickiness during use, and appearance were evaluated when using Foundation A containing a film-forming polymer. The results are also shown in Tables 2 to 4. In the table of examples, the content of each component indicates the active amount.

[0050] [Table 2]

[0051] [Table 3]

[0052] [Table 4]

[0053] Example 15 (Evaluation of spray containers) A skin cleansing composition with the composition shown in Table 5 was prepared in the same manner as in Example A and placed in the spray containers shown in Table 6. The mist state (liquid spread, liquid volume at high-speed discharge) when the skin cleansing composition was discharged from each container was evaluated. The results are also shown in Table 6.

[0054] (4) Evaluation of the mist: Liquid spread: A mist was sprayed once from a distance of 12 cm onto a wall covered with newspaper, and its diameter was measured. Three measurements were taken, and the average value was calculated. Liquid volume during high-speed dispensing: The amount of liquid dispensed into a plastic container placed on a balance was measured when dispensing at a high speed of 2 times / second, five times. Three measurements were taken, and the average value was calculated.

[0055] [Table 5]

[0056] [Table 6]

[0057] Examples 16-19 A skin cleansing composition with the composition shown in Table 7 was prepared in the same manner as in Example A. The removal potential, non-stickiness during use, and appearance were evaluated, and the viscosity at 5°C was measured to evaluate the mist discharge performance at 5°C viscosity. The results are also shown in Table 7.

[0058] (5) Viscosity: Each skin cleansing agent composition was left overnight in a 5°C constant temperature bath, and then its viscosity was immediately measured at room temperature using a B-type viscometer. The measurement was performed using a digital viscometer, model TVB-M10 (manufactured by Tokai Sangyo Co., Ltd.), with a spindle M1, 60 rpm, and 1 minute.

[0059] (6) Mist discharge properties: Each skin cleansing agent composition was placed in a spray container (trigger-type dispenser C) and dispensed several times. The state of the liquid dispensed was observed visually.

[0060] [Table 7]

[0061] Test Example 1 A skin cleansing agent composition with the composition shown in Table 8 was prepared, placed in a spray container (trigger-type spray dispenser C), and its removal potential against sunscreen product A containing a film-forming polymer, or sunscreen product B without a film-forming polymer, was evaluated. The results are shown in Table 9 for the case using sunscreen product A and in Table 10 for the case using sunscreen product B.

[0062] (7) Sunscreen removal potential: 0.05g of sunscreen was applied to a 5cm x 10cm area on a 7cm x 12cm black artificial leather sheet (Okamoto Chemical Co., Ltd., Laforet Black), and allowed to dry for more than 6 hours. For the sunscreens used, we used Kao Biore UV Kids Pure Milk SPF50, PA+++ (Sunscreen Product A), which contains a film-forming polymer, and Kao Curel Day Barrier UV Lotion (Emulsion Type) SPF50+, PA+++ (Sunscreen Product B), which does not contain a film-forming polymer. The skin cleansing compositions prepared in Table 8 were applied to the sunscreen application sheets, and their removal potential was evaluated by (i) applying them and then wiping, and (ii) impregnating a sheet (a dry nonwoven fabric separate from the sunscreen application sheet) with the compositions and then wiping. In the case of (ii), the sheets were sprayed with 2 doses (1 mL), 4 doses (2 mL), and 16 doses (8 mL) of the liquid for evaluation.

[0063] (i) How to wipe off after applying: After spraying the skin cleansing composition twice (equivalent to 1g) onto the sunscreen application sheet, divide the sunscreen application surface into six sections and rub each section three times in a circular motion with two fingers, applying approximately 150-200g of pressure. Then, divide the application surface into two sections and wipe each section once with a dry nonwoven fabric (the same as in (ii)) using 150-200g of pressure to remove any liquid components from the sheet. (ii) Method of impregnating a sheet and wiping: Apply the skin cleansing composition to a 15 x 20 cm area for a predetermined number of times. 2 The solution was sprayed onto cut nonwoven fabric and left to soak overnight or longer to create an impregnated sheet. The nonwoven fabric is made of cotton / rayon / PET = 50 / 30 / 20 with a basis weight of 45 g / m². 2 I used the one that was used. The sunscreen-coated area was divided into two sections, and each section was wiped five times with a pressure of 150-200g using a four-folded impregnated sheet, switching sides as needed. The amount of residual sunscreen was measured as the whiteness derived from the UV scattering agents contained in the sunscreen, and the removal rate was calculated by measuring the color difference (L, a, b values) before application, after application, and after wiping and washing. This was then shown as a relative value based on the removal rate of sunscreen removed by method (i). The degree of remaining whiteness was also observed visually.

[0064] [Table 8]

[0065] [Table 9]

[0066] Table 9 shows the results when using sunscreen product A, which contains a film-forming polymer. The relative removal rate of the skin cleansing agent composition of Example 15 was measured, with the removal rate of sunscreen when evaluated by method (i) set as 1. As a result, when impregnating a sheet and wiping, most of the liquid was absorbed by the sheet and did not work when sprayed two or four times, resulting in inferior cleansing power. Sixteen sprays were required to obtain equivalent cleansing power, which was inefficient. Furthermore, in visual evaluation, whiteness was not noticeable with method (i), whereas whiteness was noticeable when removed with sheets sprayed two or four times. On the other hand, when the cleaning solution of Comparative Example 9 was used and evaluated by method (i), the cleaning efficiency was inferior and the whiteness was noticeable.

[0067] [Table 10]

[0068] Table 10 shows the results when using sunscreen product B, which does not contain a film-forming polymer. The relative removal rate of the skin cleansing composition of Example 15 was measured, with the removal rate of sunscreen when evaluated by method (i) set as 1. As a result, when impregnated with a sheet and wiped, sheets sprayed 2, 4, and 16 times all showed relatively high removal rates, and whiteness was not noticeable. Furthermore, when Comparative Example 9 was evaluated by method (i), it was found that sunscreen product B was sufficiently removed. In other words, sunscreens that do not contain film-forming polymers were not affected by the method or formulation.

[0069] Prescription Example 1 A skin cleansing composition with the composition shown in Table 11 was prepared in the same manner as in Example A and placed in a spray bottle. The resulting skin cleansing composition has high removal potential, good temperature stability, and leaves the skin feeling non-sticky after use. By spraying it directly onto the skin from a spray bottle, it can be sprayed and cleansed freely and uniformly over both small and large areas.

[0070] [Table 11]

Claims

1. The following components (A), (B), (C), and (D): (A) A water-soluble nonionic surfactant containing 50% by mass or more of one or more nonionic surfactants with an HLB of 13 or higher selected from (a1), (a2), and (a3), 2 to 20% by mass, (a1) Polyoxyethylene laurate ester, (a2) Polyoxyethylene (caprylic / capric acid) glyceryl, (a3) Polyoxyethylene coconut oil fatty acid glyceryl, (B) One or more compounds selected from (b1), (b2), and (b3), (b1) Phenoxyethanol 0.3-1% by mass, (b2) Methylparaben 0.1-0.4% by mass, (b3) Ethylparaben 0.05-0.2% by mass, (C) One or more compounds selected from (c1), (c2), and (c3), (c1) 1,3-butylene glycol, (c2) Dipropylene glycol, (c3) Ethanol, (D) Water An aqueous liquid composition containing, wherein the mass ratio of component (A) to component (B) (A) / (B) is 5 or more, and the viscosity at 5°C is 20 mPa·s or less, (Z) A mist-dispensing spray container that dispenses mist in response to a user's pressing motion, wherein the ratio of the liquid volume (mL) of the composition dispensed when the user performs one full pressing motion to the nozzle diameter (mm) is 0.6 or more, and the spray container is filled with a skin cleansing composition.

2. (Z) The skin cleansing composition according to claim 1, wherein the spray container dispenses 0.2 to 0.7 mL in a single application.

3. (Z) A mist-dispensing spray container that dispenses mist in response to a user's pressing motion, wherein the skin cleansing composition according to claim 1 or 2, wherein 2 / (the average amount of liquid of the composition dispensed per press (mL) when the user performs five pressing motions at 2 times / second) is 10 or less.

4. (Z) A mist-dispensing spray container that dispenses mist in response to a user's pressing motion, wherein the ratio of the amount of liquid (mL) of the composition dispensed per press on average when the user performs five pressing motions at two presses per second to the amount of liquid (mL) of the composition dispensed when the user performs one full pressing motion is 50% or more, according to claim 1 or 2.

5. A skin cleansing composition according to claim 1 or 2, wherein component (B) comprises (b1) and one or more selected from (b2) and (b3), and the mass ratio of (b1) to the total amount of (b2) and (b3), (b1) / ((b2)+(b3)), is 0.5 to 5.

6. A skin cleansing composition according to claim 1 or 2, wherein, in addition to component (A), it contains (E) a nonionic surfactant with an HLB of less than 10, and the mass ratio of component (A) to component (E), (A) / (E), is 5 or more.

7. A method for cleansing the skin, comprising spraying the skin cleansing composition according to claim 1 or 2 onto the skin, and then wiping it off or rinsing it off.

8. A method for cleansing the skin, comprising spraying the skin cleansing composition according to claim 1 or 2 onto the skin, allowing it to penetrate, and then wiping it off or rinsing it off.

9. The following components (A), (B), (C), and (D): (A) A water-soluble nonionic surfactant containing 50% by mass or more of one or more nonionic surfactants with an HLB of 13 or higher selected from (a1), (a2), and (a3), 2 to 20% by mass, (a1) Polyoxyethylene laurate ester, (a2) Polyoxyethylene (caprylic / capric acid) glyceryl, (a3) Polyoxyethylene coconut oil fatty acid glyceryl, (B) One or more compounds selected from (b1), (b2), and (b3), (b1) Phenoxyethanol 0.3-1% by mass, (b2) Methylparaben 0.1 to 0.4% by mass in the composition (b3) Ethylparaben 0.05 to 0.2% by mass in the composition (C) One or more compounds selected from (c1), (c2), and (c3), (c1) 1,3-butylene glycol, (c2) Dipropylene glycol, (c3) Ethanol, (D) Water A water-based liquid composition containing, wherein the mass ratio of component (A) to component (B) (A) / (B) is 5 or more, and the viscosity at 5°C is 20 mPa·s or less, (Z) A mist-dispensing spray container for containing the composition, which discharges mist in response to a user's pressing motion, wherein the ratio of the liquid volume (mL) of the composition discharged when the user performs one full pressing motion to the nozzle diameter (mm) is 0.6 or more. Articles for skin cleaning.

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