Oil-based cleaning agent

Abstract

To provide an oily cleanser having excellent stability immediately after production and temporal stability and excellent usability such as lack of sliminess and good make-up removability.SOLUTION: There is provided an oily cleanser which comprises the following components (A) to (E): (A) isostearic acid and / or oleic acid, (B) sodium hydroxide and / or triethanolamine, (C) an oil agent which is liquid at 25°C (D) 1 to 3 mass% of water, (E) a nonionic surfactant which is liquid at 25°C and has an HLB of 7 to 12, where a value obtained by weight-averaging an IOB value of each of the component (C) contained based on the content mass ratio is more than 0.05 and less than 0.3.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to an oil-based cleaning agent.

Background Art

[0002] Conventionally, some oil-based cleaning agents for washing off makeup cosmetics such as foundation and lipstick are composed of an oil agent that dissolves the constituent components of the makeup cosmetics and a nonionic surfactant for washing away these oil agents. Among them, liquid oil-based cleaning agents such as oil cleansing are known to be well compatible with makeup cosmetics and have good makeup removal after washing. However, since these liquid oil-based cleaning agents contain a large amount of liquid oil agents, there is concern about stickiness during use. From the perspective of the usability of oil-based cleaning agents, the development of an oil-based cleaning agent that achieves both non-stickiness during use and good makeup removal after use has been desired.

[0003] In order to suppress the stickiness of oil-based cleaning agents, techniques using water-soluble components have been studied. For example, any one or both of a diester of a branched fatty acid having 14 to 22 carbon atoms and polyglycerol, a diester of an unsaturated fatty acid having 14 to 22 carbon atoms and polyglycerol, or an ester of a fatty acid having 6 to 10 carbon atoms and polyglycerol, wherein the ratio of the degree of polymerization of polyglycerol to the number of bonds of the fatty acid (= degree of polymerization of polyglycerol / number of bonds of the fatty acid) is 2.0 or more and 4.0 or less, 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, a cleansing oil characterized by containing one or more selected from the group consisting of hydrophilic compounds, and a technique for reducing the emulsion particle size when suspended in a large amount of water has been disclosed (for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

[0005] However, the technology disclosed in Patent Document 1, while excellent at removing makeup during rinsing, struggled to achieve both effective makeup removal and a non-greasy feel, sometimes resulting in insufficient greasiness. Furthermore, because it contains water-soluble components within the oily cleanser, it was desirable to further enhance stability from immediately after manufacturing through the passage of time.

[0006] Thus, with conventional technology, it has not been possible to obtain an oil-based cleanser containing water-soluble components that exhibits excellent stability from immediately after manufacturing over time, satisfies the high demands for usability such as the absence of stickiness during rinsing and good makeup removal after rinsing.

[0007] This invention was made in view of the above circumstances, and aims to provide an oily cleansing agent that is excellent in stability immediately after manufacturing (stability of fatty acid salts) and stability over time, as well as excellent in makeup removal and non-greasy feel. [Means for solving the problem]

[0008] The inventors focused on the fact that fatty acid salts used in fatty acid soaps and the like provide a refreshing feeling by generating scum during rinsing, and diligently conducted research to solve the above problem. As a result, they found that water-soluble fatty acid salts neutralized with inorganic bases such as sodium hydroxide had poor stability in oily detergents containing a large amount of oily components, resulting in separation and clouding of the oily detergent. On the other hand, organic bases such as triethanolamine were easily incorporated into oils, and separation and clouding of the oily detergent were not observed, but odor changes and yellowing over time were sometimes a problem. However, they found that by setting the polarity balance of the liquid oils contained in the oily detergent (values ​​obtained by weighting the individual IOB values ​​of the liquid oils at 25°C based on the content mass ratio) to a specific range, and further combining it with a specific surfactant, it is possible to stably incorporate fatty acid salts neutralized with potassium hydroxide into the oily detergent, resulting in an oily detergent with excellent stability over time, without separation, clouding, or yellowing.

[0009] The inventors have discovered that by combining isostearic acid and / or oleic acid, potassium hydroxide and / or triethanolamine with an oil that is liquid at 25°C, a nonionic surfactant that is liquid at 25°C with an HLB of 7 to 12, and a small amount of water, and by setting the polarity balance of the oil that is liquid at 25°C (a value obtained by weighting the individual IOB values ​​of the oil that are liquid at 25°C based on their content mass ratio) within a specific range, an oily cleansing agent can be obtained that is excellent in terms of makeup removal, lack of greasiness, and stability immediately after manufacturing and over time, thus completing the present invention.

[0010] In other words, the present invention provides the following: [1] The following components (A) to (E); (A) Isostearic acid and / or oleic acid (B) Potassium hydroxide and / or triethanolamine (C) Liquid oil at 25℃ (D) Water 1~3% by mass (E) Nonionic surfactants that are liquid at 25°C and have an HLB of 7-12 This is an oily detergent containing (C), wherein the weighted average of the individual IOB values ​​of the contained component (C) based on their mass ratio is greater than 0.05 and less than 0.3. [2] The oily detergent according to [1], wherein the content of component (A) is 0.5 to 4% by mass in the oily detergent. [3] The oily detergent according to [1] or [2], wherein component (E) is polyoxyethylene glyceryl isostearate having an average number of moles of ethylene oxide added of 5 to 15. [4] The oily cleaning agent according to any one of [1] to [3] above, wherein component (C) contains at least an ester oil, and the content of the ester oil is 50% by mass or more in component (C). [5] The component (C) is an oily detergent according to any one of the above [1] to [4], which contains an ester oil and a hydrocarbon oil. [6] The oily detergent according to [5] above, wherein the mass ratio of ester oil and hydrocarbon oil in component (C) [ester oil / hydrocarbon oil] is 1.0 to 5.0. [7] The oily detergent described in any one of the preceding [1] to [6], wherein the mass ratio of component (B) and component (C) [(C) / (B)] is 80 to 800. [8] Next steps (1) to (3); (1) A step of mixing component (A) isostearic acid and / or oleic acid, component (C) an oil that is liquid at 25°C, and component (E) a nonionic surfactant that is liquid at 25°C and has an HLB of 7 to 12. (2) A step of dissolving component (B) potassium hydroxide and / or triethanolamine in component (D) water, in an amount equal to 50-150% of the neutralization rate of component (A) isostearic acid and / or oleic acid. (3) The process of mixing (1) and (2). This is a method for producing an oily detergent, characterized by containing [a specific ingredient].

[0011] In addition, this technology can also further adopt the following configurations. [9] The component (C) is the oily cleaning agent according to any one of the above [1] to [7], which does not contain volatile silicone oil.

[10] The component (C) is the oily cleaning agent according to any one of the above [1] to [7], [9], which consists of ester oil and hydrocarbon oil. [Effects of the Invention]

[0012] The oily cleaning agent of the present invention can stably contain fatty acid salts and is also excellent in stability over time. Furthermore, the oily cleaning agent of the present invention is also excellent in makeup removal and non-stickiness. [Embodiments for Carrying Out the Invention]

[0013] Hereinafter, embodiments of the present invention will be described. Note that the present invention is not limited only to the following embodiments. In this specification, "X to Y" indicating a range includes X and Y and means "X or more and Y or less".

[0014] (Component (A): isostearic acid and / or oleic acid)

[0015] The component (A) isostearic acid and / or oleic acid used in the present invention is a higher fatty acid that is liquid at room temperature and is not particularly limited as long as it is commonly used in cosmetics, quasi-drugs, pharmaceuticals, etc. In the present invention, it forms a fatty acid soap with potassium hydroxide and / or triethanolamine. Commercially available products include Isostearic Acid EX (manufactured by Kao Alcohol Industries Co., Ltd.), NAA-400 Oleic Acid (manufactured by NOF Corporation), etc.

[0016] The content of the component (A) in the present invention is not particularly limited, but from the viewpoints of stability over time and good makeup removal, etc., it is preferably 0.5 to 4% by mass (hereinafter simply referred to as "%") in the oily cleaning agent, and more preferably 1 to 3%.

[0017] (Component (B): Potassium hydroxide and / or triethanolamine)

[0018] The component (B) potassium hydroxide and / or triethanolamine used in the present invention is not particularly limited as long as it is commonly used in cosmetics, quasi-drugs, pharmaceuticals, etc. By using potassium hydroxide and / or triethanolamine, an oily cleansing agent can be obtained that is difficult to obtain with other alkaline agents such as sodium hydroxide, has excellent stability immediately after manufacturing, and has good usability, such as good makeup removal and no stickiness. In the present invention, when triethanolamine is used as component (B), separation and clouding of the oily cleansing agent are not observed, but yellowing over time may be observed. Therefore, from the viewpoint of excellent formulation stability (stability over time) of the oily cleansing agent, potassium hydroxide is preferred.

[0019] The content of component (B) in the present invention is not particularly limited, but it is preferably 50-150% of the neutralization rate of component (A), and more preferably 75-125%.

[0020] (Component (C): Liquid oil at 25°C)

[0021] The component (C) liquid oil at 25°C (hereinafter also referred to as "liquid oil") used in the present invention means an oil that has fluidity at 25°C, and is not particularly limited as long as it is commonly used in cosmetics, quasi-drugs, pharmaceuticals, etc. Examples include, but are not limited to, hydrocarbons, fats and oils, ester oils including UV absorbers, fatty acids other than component (A), higher alcohols, silicone oils, fluorinated oils, lanolin derivatives, etc., regardless of whether they are volatile or non-volatile, or of origin such as animal oils, vegetable oils, or synthetic oils. One or more of these can be appropriately selected and used.

[0022] The aforementioned component (C), as a liquid oil at 25°C, specifically includes vegetable oils such as olive oil, castor oil, mink oil, macadamia nut oil, avocado oil, and meadowfoam oil; jojoba oil, diisobutyl adipate, 2-hexyldecyl adipate, di-2-heptylundecyl adipate, alkyl glycol monoisostearate, isocetyl isostearate, trimethylolpropane triisostearate, ethylene glycol di-2-ethylhexanoate, neopentyl glycol di-2-ethylhexanoate, and tri-2-ethyl Trimethylolpropane xanoate, pentaerythritol tetra-2-ethylhexanoate, cetyl 2-ethylhexanoate, oleyl oleate, octyldodecyl oleate, decyl oleate, neopentyl glycol dicaprate, triethyl citrate, 2-ethylhexyl succinate, isocetyl stearate, butyl stearate, diisopropyl sebacate, di-2-ethylhexyl sebacate, cetyl lactate, myristyl lactate, isopropyl palmitate, 2-ethylhexyl palmitate, 2-hexyldecyl palmitate, 2-Heptylundecyl palmitate, dipentaerythritol fatty acid ester, isononyl isononanoate, isotridecyl isononanoate, isopropyl myristate, isopropyl palmitate, 2-octyldodecyl myristate, 2-hexyldecyl myristate, myristyl myristate, hexyldecyl dimethyloctanoate, ethyl laurate, hexyl laurate, 2-ethylhexyl methoxycinnamate, diisostearyl malate, glyceryl tri-2-ethylhexanoate, glyceryl tri(caprylate / caprine), Ester oils such as glyceryl licaprate, glyceryl triisostearate, diglyceryl diisostearate, diglyceryl triisostearate, diglyceryl tetraisostearate, decaglyceryl decaisostearate, glyceryl triisopalmitate, glyceryl trimiristate, diglyceryl isostearate myristate, tridecyl trimellitate, 2-octyldodecyl N-lauroyl-L-glutamate, and di(phytostearyl-2-octyldodecyl) N-lauroyl-L-glutamate;Examples of oils include silicone oils such as low-molecular-weight dimethylpolysiloxane, high-molecular-weight dimethylpolysiloxane, methylphenylpolysiloxane, decamethylcyclopentasiloxane, octamethylcyclotetrasiloxane, and fluorine-modified organopolysiloxane; fluorine-based oils such as perfluorodecane, perfluorooctane, and perfluoropolyether; hydrocarbon oils such as isododecane, isohexadecane, light liquid isoparaffin, liquid paraffin, heavy liquid isoparaffin, α-olefin oligomer, squalane, polyisobutylene, and polybutene; higher alcohols such as oleyl alcohol, isostearyl alcohol, octyldodecanol, and decyltetradecanol; and lanolin derivatives such as lanolin acetate, isopropyl lanolin fatty acid, and lanolin alcohol. One or more of these can be appropriately selected and used.

[0023] In the present invention, component (C), a liquid oil at 25°C, is preferably one or more selected from the group consisting of ester oils, hydrocarbon oils, and silicone oils. From the viewpoint of long-term stability and good makeup removal, it is more preferable to contain at least an ester oil, and even more preferable to contain both an ester oil and a hydrocarbon oil.

[0024] For component (C), which is a liquid oil at 25°C, an IOB value of 0 to 0.5 is preferable from the viewpoint of usability such as long-term stability, good makeup removal, and lack of greasiness, and a value of 0 to 0.4 is more preferable from the viewpoint of lack of greasiness.

[0025] The ester oil of component (C) is preferably 0.05 to 0.5 in IOB value, and more preferably 0.1 to 0.4 in IOB value. Examples of these ester oils include propylene glycol dicaprate (IOB value: 0.26), isotridecyl isononanoate (IOB value: 0.16), cetyl 2-ethylhexanoate (IOB value: 0.13), alkyl (C12-15) benzoate (IOB value: 0.19), jojoba oil (IOB value: 0.07), glyceryl tri-2-ethylhexanoate (IOB value: 0.35), neopentyl glycol dicaprate (IOB value: 0.25), neopentyl glycol diethylhexanoate (IOB value: 0.32), trimethylolpropane triethylhexanoate (IOB value: 0.33), pentaerythrityl tetraoctanoate (IOB value: 0.35), glyceryl tri(caprylate / caprate) (IOB value: 0.35), palm oil. Examples include octyl tinate (IOB value: 0.13), cetyl octanoate (IOB value: 0.13), isopropyl myristate (IOB value: 0.18), glyceryl triisostearate (IOB value: 0.18), trimethylolpropane triisostearate (IOB value: 0.20), isononyl isononanoate (IOB value: 0.20), diisostearyl malate (IOB value: 0.27), glyceryl diisostearate (IOB value: 0.29), trimethylolpropane trioctanoate (IOB value: 0.31), di-2-ethylhexyl succinate (IOB value: 0.32), tetra(behenic acid / benzoic acid / ethylhexanoic acid) pentaerythritol (IOB value: 0.35), and diisopropyl sebacate (IOB value: 0.40).

[0026] Furthermore, the ester oil of component (C) is preferably 500 or less in molecular weight, and more preferably 200 to 500 in molecular weight from the viewpoint of usability, such as good makeup removal and lack of greasiness. Examples of ester oils with a molecular weight of 500 or less include propylene glycol dicaprate, cetyl 2-ethylhexanoate, glyceryl tri-2-ethylhexanoate, isopropyl myristate, glyceryl tri(caprylic / capric acid), cetyl octanoate, and isotridecyl isononanoate. In the present invention, it is particularly preferable to use one or more selected from propylene glycol dicaprate, cetyl 2-ethylhexanoate, glyceryl tri-2-ethylhexanoate, isopropyl myristate, and glyceryl tri(caprylic / capric acid) because it provides excellent stability over time and further improves usability, such as good makeup removal and lack of greasiness.

[0027] Furthermore, the hydrocarbon oil of component (C) is preferably of an IOB value of 0. Examples of such hydrocarbon oils include isododecane (IOB value: 0), isohexadecane (IOB value: 0), mineral oil (IOB value: 0), hydrogenated polyisobutene (IOB value: 0), squalane (IOB value: 0), etc. Mineral oil and / or hydrogenated polyisobutene are particularly preferred because they offer excellent stability over time, and further improve usability, such as good makeup removal and a lack of stickiness.

[0028] The silicone oil of component (C) of the present invention preferably has an IOB value of 0.15 to 0.5.

[0029] Here, we will explain the IOB value. The IOB value is a value determined based on the Organic Concept Diagram (Takashi Fujita, Prediction of Organic Compounds and the Organic Concept Diagram, Chemistry Vol. 11, No. 10 (1957) 719-715). More specifically, in this Organic Concept Diagram, the degree of physical properties of a compound is defined as "organic" (mainly due to van der Waals forces) and "inorganic" (mainly due to electrical affinity). The IOB value is an index that shows the balance between inorganic and organic properties, and is expressed as IOB value = inorganic value / organic value. Compounds with a larger IOB value are said to exhibit higher hydrophilicity and polarity.

[0030] The content of component (C) in the present invention is not particularly limited, but it is preferably 50-95%, more preferably 60-90%, and even more preferably 60-80% in the oily cleanser. This range is preferable because it improves stability over time, as well as usability such as good makeup removal and lack of stickiness.

[0031] The ester oil content of component (C) is not particularly limited, but is preferably 30-80%, more preferably 40-80%, and even more preferably 40-70% in the oily cleanser. Furthermore, the ester oil content relative to the total amount of component (C) is not particularly limited, but is preferably 40-100%, more preferably 50-90%, and even more preferably 50-80%. This range is preferable because it improves long-term stability and makeup removal performance.

[0032] The hydrocarbon oil content of component (C) is not particularly limited, but is preferably 5-50%, more preferably 10-40%, and even more preferably 15-30% in the oily cleanser. Furthermore, the hydrocarbon oil content relative to the total amount of component (C) is not particularly limited, but is preferably 10-50%, more preferably 20-50%, and even more preferably 20-45%. This range is preferable because it improves long-term stability and makeup removal performance.

[0033] The content of silicone oil in component (C) is not particularly limited, but is preferably 1 to 15%, more preferably 1 to 10%, and even more preferably 1 to 7% in the oily cleanser. This range is preferable because it results in better makeup removal.

[0034] Furthermore, component (C) of the present invention may contain silicone oil, but from the viewpoint of long-term stability and lack of stickiness, it is more preferable that component (C) does not contain volatile silicone oil, and it is even more preferable that component (C) consists of hydrocarbon oil and ester oil. Here, volatile silicone refers to a substance with a boiling point of 300°C or less at 1 atmosphere, and specifically, examples include volatile dimethicone, methyl trimethicone, and cyclic silicone (such as cyclic dimethylsiloxane).

[0035] Furthermore, in the present invention, the mass ratio of ester oil and hydrocarbon oil in component (C) [ester oil / hydrocarbon oil] is not particularly limited, but is preferably 1.0 to 5.0, more preferably 1.0 to 4.0, even more preferably 1.4 to 3.9, and particularly preferably 1.4 to 3.7. This range is preferable because it improves stability over time, as well as usability such as good makeup removal and lack of stickiness.

[0036] In the present invention, the polarity balance of the liquid oil is important from the viewpoint of stably containing fatty acid salts in the oily detergent. When adjusting the polarity balance, it is possible to adjust it using a polar oil alone or by combining a polar oil and a non-polar oil. It is preferable to combine a polar oil and a non-polar oil, and it is more preferable to combine an ester oil as the polar oil and a hydrocarbon oil as the non-polar oil.

[0037] As described above, in the present invention, in order to stably contain fatty acid salts in the oily detergent and to maintain the long-term stability of the oily detergent, the polarity balance of the liquid oils {a value obtained by weighting the individual IOB values ​​of the contained component (C) based on the content mass ratio (hereinafter simply referred to as "weighted average of the IOB values ​​of component (C)")} is important. In the present invention, the weighted average of the IOB values ​​of component (C) is calculated by dividing the sum of the products of the content of each oil corresponding to component (C) and the IOB value of each oil by the sum of the content of each oil (a value represented by the following formula (1)). Weighted average of IOB values ​​of component (C) = [(C1: Content (%) × IOB value) + (C2: Content (%) × IOB value) + (C3: Content (%) × IOB value) + ... / (C1 + C2 + C3 + ...: Content (%))] ... (Equation 1)

[0038] In the present invention, the weighted average IOB value of component (C) is preferably greater than 0.05 as a lower limit from the viewpoint of stability immediately after manufacturing and stability over time, and preferably 0.10 or higher, and more preferably 0.15 or higher, from the viewpoint of stability over time and good makeup removal. Furthermore, the upper limit is less than 0.3, preferably 0.28 or lower, more preferably 0.26 or lower from the viewpoint of no stickiness, and even more preferably 0.20 or lower from the viewpoint of stability over time and good makeup removal. In addition, if the weighted average IOB value of component (C) is 0.05 or lower, or 0.3 or higher, the polarity balance between the oil and fatty acid salt in the oily cleanser is disrupted, making it impossible to stably contain the fatty acid salt in the oily cleanser, and tending to result in insufficient stability over time.

[0039] Furthermore, in the present invention, although components (A) to (E) can be obtained by appropriately including them, it is preferable to specify the mass ratio of components (B) and (C) so that a higher effect can be expected in terms of long-term stability and good makeup removal. The mass ratio of components (B) and (C) [(C) / (B)] is not particularly limited, but the lower limit is preferably 40 or more, more preferably 80 or more, and even more preferably 100 or more. The upper limit is preferably 1000 or less, more preferably 800 or less, even more preferably 700 or less, and particularly preferably 500 or less.

[0040] (Component (D): water)

[0041] The component (D) water used in the present invention is not particularly limited as long as it is commonly used in cosmetics, quasi-drugs, pharmaceuticals, etc. In addition to purified water, deep sea water or steam-distilled water from plants such as rose water or lavender water may also be used, as long as the effects of the present invention are not impaired, and one or more types may be appropriately selected and used as needed.

[0042] Furthermore, the content of component (D) in the present invention is 1 to 3% in the oily detergent, and more preferably 1.5 to 3% from the viewpoint of long-term stability, etc. If it is less than 1% or more than 3%, separation tends to occur in the oily detergent, resulting in insufficient stability.

[0043] (Component (E): A nonionic surfactant that is liquid at 25°C and has an HLB of 7-12)

[0044] The nonionic surfactant used in this invention, which is liquid at 25°C and has a component (E)HLB of 7 to 12, is not particularly limited as long as it is commonly used in cosmetics, quasi-drugs, pharmaceuticals, etc.

[0045] Here, HLB (Hyrdrophile-Lipophile Balance) in this invention is an index that indicates the balance between hydrophilicity and lipophilicity, and is calculated by the following formula (Equation 2) by Oda, Teramura et al. HLB = "Inorganic value (IV) / Organic value (OV)" × 10 ... (Equation 2) (See Yoshio Koda, "Organic Concept Diagrams - Fundamentals and Applications," pp. 11-17, Sankyo Publishing, 1984)

[0046] The component (E) of the present invention, having an HLB of 7 to 12, is a nonionic surfactant that is liquid at 25°C and is fluid at 25°C. Any nonionic surfactant with an HLB value in the range of 7 to 12 can be used. Examples include sorbitan fatty acid esters, polyglycerin fatty acid esters, sucrose fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene glycol fatty acid esters, polyoxyethylene glycerin fatty acid esters, polyoxyethylene alkyl ethers, polyoxyethylene polyoxypropylene alkyl ethers, polyoxyethylene hydrogenated castor oil, polyoxyethylene fatty acid ethanolamide, polyoxyalkylene-modified silicones, and polyoxyalkylene alkyl-comodified silicones. One or more of these can be appropriately selected and used.

[0047] In the present invention, the liquid nonionic surfactant, component (E)HLB7-12, is preferably a polyoxyethylene chain, and more preferably is polyoxyethylene glyceryl isostearate, having an average number of moles of ethylene oxide added of 5-15, from the viewpoint of being able to stably contain fatty acid salts in oily detergents and also having excellent long-term stability.

[0048] Examples of commercially available polyoxyethylene glyceryl isostearate products with an average number of ethylene oxide additions of 5 to 15 include Uniox GM-5IS (manufactured by NOF Corporation), EMALEX GWIS-105EX (manufactured by Nippon Emulsion Co., Ltd.), Uniox GM-8IS (manufactured by NOF Corporation), EMALEX GWIS-108 (manufactured by Nippon Emulsion Co., Ltd.), M Fine Oil ISG-8M (manufactured by Miyoshi Oil & Fat Co., Ltd.), Uniox GM-101S (manufactured by NOF Corporation), EMALEX GWIS-110EX (manufactured by Nippon Emulsion Co., Ltd.), Uniox GM-15IS (manufactured by NOF Corporation), EMALEX GWIS-115EX (manufactured by Nippon Emulsion Co., Ltd.), and others.

[0049] The content of component (E) in the present invention is not particularly limited, but from the viewpoint of usability such as stability over time, good makeup removal, and lack of stickiness, it is preferably 5 to 40%, more preferably 10 to 30%, and even more preferably 15 to 30% in the oily cleanser.

[0050] In the present invention, although components (A) to (E) can be obtained by appropriately including them, it is preferable to specify the mass ratio of components (B) and (E) so that higher effects can be expected in terms of long-term stability, good makeup removal, and lack of stickiness. The mass ratio of components (B) and (E) [(E) / (B)] is not particularly limited, but the lower limit is preferably 10 or more, more preferably 30 or more, and even more preferably 40 or more. The upper limit is preferably 500 or less, more preferably 300 or less, and even more preferably 250 or less.

[0051] In addition to the essential components described above, the oily cleansing composition of the present invention may contain, as necessary, components commonly used in cosmetics, within a quantitative and qualitative range that does not impair the effects of the present invention. For example, it may contain oily components other than component (C), surfactants other than component (E), powders, water-soluble polymers, aqueous components such as humectants, antioxidants, cosmetic ingredients, preservatives, fragrances, cooling agents, etc.

[0052] Any water-soluble component may be used as the aqueous component, for example, glycols such as propylene glycol, 1,3-butylene glycol, dipropylene glycol, and polyethylene glycol; glycerols such as glycerin, diglycerin, and polyglycerin; sugar alcohols such as sorbitol, maltitol, and glucose; and lower alcohols such as ethanol.

[0053] The oily detergent of the present invention can be implemented in various forms, such as liquid, gel, emulsion, cream, semi-solid, solid, and mousse, but a liquid form is preferable for obtaining the effects of the present invention. Here, liquid means that the viscosity measured using a Brookfield rotational viscometer at 25°C is 15,000 mPa·s or less, preferably 10,000 mPa·s or less, more preferably 7,000 mPa·s or less, and even more preferably 5,000 mPa·s or less. Furthermore, the dosage form of the oily detergent of the present invention is preferably either an oily type or a solubilized type, and from the viewpoint of stability immediately after formulation and stability over time, the solubilized type is more preferable.

[0054] The oily cleansing agent of the present invention can be applied to cleansing agents, facial washes, shampoos, body soaps, hand soaps, massage agents, peeling agents, and the like. From the viewpoint of experiencing the effects of the present invention, cleansing agents and facial washes are preferred.

[0055] (Manufacturing method) The oily cleaning agent of the present invention is not particularly limited and can be prepared by conventional methods. For example, it can be prepared by uniformly mixing and dissolving components (A), (C), (E) and components (B), (D), and then mixing the two together.

[0056] [Examples]

[0057] Examples 1-19 and Comparative Examples 1-8: Oil-based cleaning agents Oily cleansing agents with the compositions shown in Tables 1 and 2 below were prepared using the manufacturing method described below. The stability immediately after formulation (stability of fatty acid salts), stability over time (50°C and 5°C / 2 weeks), lack of stickiness, and makeup removal performance were evaluated using the evaluation method and criteria described below, and the results are shown in Tables 1 and 2.

[0058] [Table 1]

[0059] [Table 2] *Note: Yellowing was observed during long-term stability testing (50°C / 2 weeks). (Note 1) Isostearate EX (manufactured by Higher Alcohol Industry Co., Ltd.) (Note 2) NAA-400 oleic acid (manufactured by NOF Corporation) (Note 3) Flake potassium hydroxide (manufactured by Toagosei Co., Ltd.) (Note 4) CETIOL SN-1 (manufactured by BASF) (Note 5) MIRITOL GTEH (manufactured by BASF) (Note 6) Cosmoll 222 (manufactured by Nisshin Oillio Co., Ltd.) (Note 7) Moresco White P-70K (Made by Moresco) (Note 8) SH245 FLUID (Toray Dow Corning) (Note 9) M Fine Oil CCT-1 (manufactured by Miyoshi Oil Co., Ltd.) (Note 10) M Fine Oil ISG-8M (manufactured by Miyoshi Oil Co., Ltd.)

[0060] (Manufacturing method) A: Mix ingredients 1, 2, and 7-15 uniformly. B: Mix ingredients 3-6 uniformly. C: An oily cleaning agent was obtained by mixing A and B.

[0061] [Evaluation Method 1] Stability immediately after manufacturing

[0062] The stability of fatty acid salts in oily detergents can be confirmed by their stability immediately after manufacturing. Here, immediate stability was assessed by visually observing each sample immediately after manufacturing to determine if separation and / or turbidity were observed.

[0063] [Judgment] :[Evaluation] ○ (Excellent): No separation or turbidity observed. × (Not acceptable): Separation and / or turbidity are observed. Furthermore, any oil-based detergents that showed phase separation or precipitation of contents were classified as having separation or turbidity, respectively.

[0064] [Evaluation Method 2] Stability over time (50°C and 5°C / 2 weeks) For long-term stability, each sample was placed in a glass container, sealed, and stored for two weeks at constant temperatures of 50°C and 5°C, respectively. After visual inspection, the separation and turbidity were evaluated according to the following three-stage criteria, and compared with samples stored at 25°C for the same period.

[0065] 3-stage evaluation criteria [Judgment] :[Evaluation] ◎(Excellent): No separation or turbidity observed. ○ (Good): Slight separation and / or turbidity are observed. × (Not acceptable): Separation and / or turbidity are observed.

[0066] [Evaluation Method 3] Lack of stickiness, ease of makeup removal Twenty cosmetic evaluation panel members were asked to use a water-in-oil liquid foundation prepared using the following formulation and manufacturing method. One hour after application, each sample was evaluated on a 5-point scale according to the following criteria for "lack of stickiness" upon rinsing and "ease of makeup removal" after rinsing. The average score of all panel members was then determined according to the following criteria. Samples where evaluation of "lack of stickiness" and "ease of makeup removal" was difficult due to reduced stability were judged as "-".

[0067] Formula for water-in-oil liquid foundation (suitable for cleansing) (Ingredients) (%) 1. Polyoxyethylene methylsiloxane / polyoxypropylene Oleylmethylsiloxane / dimethylsiloxane copolymer (Note 11) 2 2. PEG-3 Dimethicone (Note 12) 1 3. Decamethylcyclopentasiloxane 20 4. Silicone-treated talc (Note 13) 5 5. Silicone-treated red iron oxide (Note 13) 0.5 6. Silicone-treated yellow iron oxide (Note 13) 0.5 7. Silicone-treated black iron oxide (Note 13) 0.5 8. Silicone-treated titanium dioxide (Note 13) 10 9. Glyceryl tri-2-ethylhexanoate 10 10. Sorbitan sesquioleate 0.5 11. Purified water remaining amount 12. Sodium chloride 0.5 13.1,3-Butylene glycol 10 14. Alcohol 5 15. Preservative (methyl parahydroxybenzoate) 0.1 16.Fragrance 0.2 (Note 11) KF-6026 (manufactured by Shin-Etsu Chemical Co., Ltd.) (Note 12) KF-6015 (manufactured by Shin-Etsu Chemical Co., Ltd.) (Note 13) Treatment with 2% dimethylpolysiloxane

[0068] Method for manufacturing a water-in-oil liquid foundation (for cleansing) A: Mix ingredients 1-3 uniformly. B: Disperse ingredients 4-10 evenly using a roller. Add B to C:A and mix thoroughly. Ingredients 11-16 were added to D:C and emulsified to obtain a water-in-oil liquid foundation.

[0069] 5-point rating scale [Rating]:[Evaluation Result] 5 points: very good 4 points: Good 3 points: Average 2 points: Slightly poor 1 point: Defective 3-stage evaluation criteria [Judgment]: [Average score of the ratings] ◎ (Excellent): 4.0 or higher ○ (Good): Greater than 3.0 and less than 4.0 × (not possible): 3.0 or less

[0070] As is clear from the results in Tables 1 and 2, the oily cleansing agents of Examples 1 to 19 of the present invention were superior to the oily cleansing agents of Comparative Examples 1 to 8 in terms of stability immediately after production, stability over time, lack of stickiness, and makeup removal performance. Furthermore, in Example 19, in which triethanolamine, an organic base, was used instead of component (B), no separation or clouding of the oily cleansing agent was observed from immediately after production to over time, indicating good stability, although yellowing was observed at high temperatures.

[0071] In contrast, in Comparative Examples 1-3, 5, and 6, where the weighted average of the individual IOB values ​​of component (C) obtained by weighting them based on their mass ratio (weighted average of IOB values ​​of component (C)) was 0.3 or higher and 0.05 or lower, it was difficult to stably incorporate fatty acid salts into the oily detergent, and satisfactory stability over time could not be obtained. Furthermore, in Comparative Example 4, where sodium hydroxide was used instead of component (B), the fatty acid salts neutralized by sodium hydroxide precipitated, and separation and turbidity of the oily detergent were observed immediately after production, resulting in unsatisfactory results. Moreover, in Comparative Examples 7 and 8, where component (D) was less than 1% or more than 3%, satisfactory stability immediately after production and stability over time could not be obtained.

[0072] Example 20: Cleansing oil (components) (mass%) 1.Purified water 1.5 2. Glycerin 0.3 3. Potassium hydroxide (Note 3) 0.2 4. Triethanolamine 0.1 5. Isostearic acid (Note 1) 1.0 6.2-Cetyl ethylhexanoate (IOB value: 0.13) (Note 4) 25 7. Glyceryl tri-2-ethylhexanoate (IOB value: 0.35) (Note 5) Remaining amount 8. Mineral oil (IOB value: 0) (Note 7) 20 9. Isopropyl myristate (IOB value: 0.18) (Note 14) 3.0 10. Propylene glycol dicaprate (IOB: 0.26) (Note 15) 1.0 11. Jojoba oil (IOB value: 0.07) (Note 16) 1.0 12. PEG-8 glyceryl isostearate (Note 10) 25 13. BHT 0.02 14. Phenoxyethanol 0.05 15.Fragrance 0.01 16. Ethanol 1.0 (Note 14) IPM-EX (manufactured by Japan Surfactant Industry Co., Ltd.) (Note 15) Nikkor PDD (manufactured by Japan Surfactant Industry Co., Ltd.) (Note 16) Refined jojoba oil (manufactured by Kofu Alcohol Industry Co., Ltd.)

[0073] (Manufacturing method) A: Mix and dissolve components 1-4 and components 5-14 uniformly, then mix the two together. B: Components 15 and 16 were uniformly mixed and added to A to obtain an oily cleaning agent.

[0074] The cleansing oil of Example 20 exhibited good stability immediately after manufacturing, stability over time, effective makeup removal, and lack of greasiness. The weighted average of the individual IOB values ​​of component (C) based on their mass ratio was 0.16.

[0075] Example 21: Facial Cleanser (components) (mass%) 1.Purified water 1.5 2,1,3-Butylene glycol 0.3 3. Dipropylene glycol 0.2 4. Potassium hydroxide (Note 3) 0.6 5. Isostearic acid (Note 1) 3.0 6.2-Cetyl ethylhexanoate (IOB value: 0.13) (Note 4) 30 7. Glyceryl tri-2-ethylhexanoate (IOB value: 0.35) (Note 5) Remaining amount 8. Mineral oil (IOB value: 0) (Note 7) 15 9. Jojoba oil (IOB value: 0.07) (Note 16) 3.0 10. PEG-8 glyceryl isostearate (Note 10) 25 11. Tocopherol 0.02 12. Phenoxyethanol 0.05 13.Fragrance 0.03 14. Ethanol 1.0

[0076] (Manufacturing method) A: Mix components 1-4 and components 5-12 uniformly and dissolve them, then mix the two together. B: Components 13 and 14 were uniformly mixed and added to A to obtain an oily cleaning agent.

[0077] The cleansing agent of Example 21 exhibited good stability immediately after manufacturing, stability over time, effective makeup removal, and lack of stickiness. The weighted average of the individual IOB values ​​of the contained component (C) based on their mass ratio was 0.16.

Claims

1. The following components (A) to (E): (A) Isostearic acid and / or oleic acid (B) Potassium hydroxide and / or triethanolamine (C) Liquid oil at 25°C (D) Water 1-3% by mass (E) Nonionic surfactants that are liquid at 25°C and have an HLB of 7 to 12 It contains, and the weighted average of the individual IOB values ​​of the contained component (C) based on the mass ratio of the contained components is greater than 0.05 and less than 0.3, and An oily detergent in which component (E) is polyoxyethylene glyceryl isostearate having an average number of moles of ethylene oxide added of 5 to 15.

2. The oily detergent according to claim 1, wherein the content of component (A) is 0.5 to 4% by mass in the oily detergent.

3. The oily cleaning agent according to claim 1 or 2, wherein component (C) contains at least an ester oil, and the content of the ester oil in component (C) is 50% by mass or more.

4. The oily cleaning agent according to any one of claims 1 to 3, wherein the component (C) contains an ester oil and a hydrocarbon oil.

5. The oily detergent according to claim 4, wherein the mass ratio of ester oil and hydrocarbon oil in component (C) [ester oil / hydrocarbon oil] is 1.0 to 5.

0.

6. The oily cleaning agent according to any one of claims 1 to 5, wherein the mass ratio of component (B) and component (C) [(C) / (B)] is 80 to 800.

7. The following components (A) to (E); (A) Isostearic acid and / or oleic acid (B) Potassium hydroxide (C) Liquid oil at 25°C (D) Water 1-3% by mass (E) Nonionic surfactants that are liquid at 25°C and have an HLB of 7 to 12 An oily detergent containing (C), wherein the weighted average of the individual IOB values ​​of the contained component (C) based on their mass ratio is greater than 0.05 and less than 0.

3.

8. Next steps (1) to (3); (1) A step of mixing component (A) isostearic acid and / or oleic acid, component (C) an oil that is liquid at 25°C, and component (E) a nonionic surfactant that is liquid at 25°C and has an HLB of 7 to 12. (2) A step of dissolving component (B) potassium hydroxide and / or triethanolamine in component (D) water, in an amount equal to 50 to 150% of the neutralization rate of component (A) isostearic acid and / or oleic acid. (3) The process of mixing (1) and (2) Includes, The weighted average of the individual IOB values ​​of component (C) based on their content mass ratio is greater than 0.05 and less than 0.3, and A method for producing an oily detergent, wherein the component (E) is polyoxyethylene glyceryl isostearate having an average number of ethylene oxide addition moles of 5 to 15.

9. The following steps (1) to (3); (1) A step of mixing component (A) isostearic acid and / or oleic acid, component (C) an oil that is liquid at 25°C, and component (E) a nonionic surfactant that is liquid at 25°C and has an HLB of 7 to 12. (2) A step of dissolving component (B) potassium hydroxide in component (D) water, in an amount equal to 50-150% of the neutralization rate of component (A) isostearic acid and / or oleic acid. (3) The process of mixing (1) and (2) Includes, A method for producing an oily detergent, wherein the weighted average of the individual IOB values ​​of component (C) based on their content mass ratio is greater than 0.05 and less than 0.3.

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