Emulsion composition and treatment method

Abstract

To provide an emulsion composition in which a stable emulsion composition can be obtained even in the case of using liquid silicone, and vegetable oil, liquid ester oil or liquid wax in combination, and a treatment method of hair, scalp and skin using the emulsion composition.SOLUTION: Provided are an emulsion composition in which (A1) polyoxyethylene alkyl ether or the like which has an alkyl group with a carbon number of 16 or more, and an average addition mole number of alkyl group of 10 or more, (B) silicone which is liquid at 25°C, (C) one or more kinds selected from vegetable oil, liquid ester oil and liquid wax, and (D) water are formulated, and an amount of blending of (D) water is 25 mass% or less, and a treatment method of hair, scalp and skin using the emulsion composition.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an emulsion composition and a processing method. The emulsion composition is preferably used as an emulsion cosmetic. [Background technology]

[0002] BACKGROUND ART Emulsion compositions containing various ingredients are used to impart desired effects to hair and skin.

[0003] As an example of an emulsion composition, Patent Document 1 discloses a leave-in emulsion-type hair cosmetic containing a long-chain alkyl acrylate / methacrylate copolymer or its salt, a higher alcohol, a nonionic surfactant, and a fatty acid ester of a polyhydric alcohol condensate. The emulsion-type hair cosmetic disclosed in Patent Document 1 is described as being non-sticky and highly stable.

[0004] Furthermore, Patent Document 2 discloses an oil-in-water emulsion skin cosmetic that contains a solid ester oil with a melting point of 40 to 50° C., an oil that is pasty at 25° C., and an oil that is liquid at 25° C., wherein the total amount of the oil that is pasty at 25° C. and the oil that is liquid at 25° C. does not exceed five times the content of the solid ester oil with a melting point of 40 to 50° C. The oil-in-water emulsion skin cosmetic of Patent Document 2 is described as lowering skin temperature and providing a refreshing (cooling) sensation when applied to the skin. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2008-019216 [Patent Document 2] Japanese Patent Application Publication No. 2018-177726 Summary of the Invention [Problem to be solved by the invention]

[0006] An emulsion composition contains an oily component, water, and a surfactant as blended ingredients, and various oily components are selected depending on the intended use of the emulsion composition. As the oily component blended in the emulsion composition, for example, as shown in Patent Documents 1 and 2, a solid oily component such as a higher alcohol or a solid ester oil may be used.

[0007] On the other hand, a liquid oil component may be used as the oil component blended in the emulsion composition. A liquid oil component is characterized by being able to impart a light, oily feel to hair and skin with less stickiness than a solid oil component. Due to such characteristics, a liquid oil component may be used in the emulsion composition, and a combination of multiple oil components may also be used.

[0008] However, when liquid silicone is combined with vegetable oil, liquid ester oil, or liquid wax as the liquid oily component to be blended into an emulsion composition, the poor compatibility between them makes it impossible to achieve uniform emulsification, and separation of the composition may occur during production, making it impossible to obtain a stable emulsion composition.

[0009] In view of the above circumstances, an object of the present invention is to provide an emulsion composition that is stable during production, even when a liquid silicone is used in combination with a vegetable oil, a liquid ester oil, or a liquid wax. Another object of the present invention is to provide a method for treating hair, scalp, or skin using the emulsion composition. [Means for solving the problem]

[0010] The present inventors have conducted extensive research and have newly discovered that even in emulsion compositions that use, as liquid oily components, a silicone that is liquid at 25°C in combination with one or more selected from vegetable oil, liquid ester oil, and liquid wax, by using a specific surfactant and limiting the amount of water to a predetermined amount or less, a stable emulsion composition can be obtained during production.The present inventors have also discovered methods for treating hair, scalp, and skin other than the scalp using the emulsion composition.

[0011] The present invention includes the following inventions [1] to

[11] .

[0012] The emulsion composition of [1] (A) one or more selected from the following (A1) to (A14): (A1) a polyoxyethylene alkyl ether having an alkyl group having 16 or more carbon atoms and having an average number of moles of oxyethylene added of 10 or more; (A2) polyoxyethylene alkylene ether, (A3) polyoxyethylene lauryl ether, (A4) polyoxyethylene phytosterol ether, (A5) polyoxyethylene polyoxypropylene alkyl ether, (A6) Polyoxyethylene hydrogenated castor oil, (A7) fatty acid N-methylethanolamide, (A8) tetra fatty acid polyoxyethylene sorbitan, (A9) tri-fatty acid polyoxyethylene glyceryl, (A10) polyoxyethylene alkyl ether carboxylic acid or a salt thereof, (A11) Polyoxyethylene alkyl ether sulfate or a salt thereof, (A12) N-acylmethylalanine or a salt thereof, (A13) α-olefin sulfonic acid or a salt thereof, (A14) mono-long chain alkyltrimethylammonium salt, (B) Silicone that is liquid at 25°C; (C) one or more selected from vegetable oils, liquid ester oils, and liquid waxes; and (D) Water; is blended, The blending amount of (D) water is 25% by mass or less.

[0013] The emulsion composition [2] is the emulsion composition [1], in which one or more selected from the above (A1) to (A12) and (A14) are blended as the above (A).

[0014] The emulsion composition [3] is the emulsion composition [1] or [2], wherein the (A) is one or more selected from the (A1), (A2), and (A4) to (A7), and the (A1) is a polyoxyethylene alkyl ether having an alkyl group having 16 or more carbon atoms and an average number of moles of oxyethylene added of 15 or more.

[0015] The emulsion composition of [4] is any one of the emulsion compositions of [1] to [3], in which the blending amount of the (B) silicone that is liquid at 25° C. is 40 mass % or more.

[0016] The emulsion composition [5] is any one of the emulsion compositions [1] to [4], which further contains (E) a polyhydric alcohol.

[0017] The emulsion composition of [6] is any one of the emulsion compositions of [1] to [5], which contains vegetable oil as the (C) above.

[0018] The emulsion composition [7] is any one of the emulsion compositions [1] to [6], wherein vegetable oil is blended as (C), and the vegetable oil is one or more selected from drying oils and semi-drying oils.

[0019] The emulsion composition of [8] is any one of the emulsion compositions of [1] to [7], and is an O / D type emulsion composition or an O / W type emulsion composition.

[0020] The emulsion composition [9] is any of the emulsion compositions [1] to [8], and is an emulsion cosmetic.

[0021] The treatment method

[10] is a method for treating at least one of hair, scalp, and skin other than the scalp using the emulsion composition of any one of [1] to [9].

[0022] The treatment method

[11] is the treatment method

[10] , which is a hair styling method. [Effects of the Invention]

[0023] According to the emulsion composition of the present invention, even when liquid silicone is used in combination with vegetable oil, liquid ester oil, or liquid wax, it is possible to obtain an emulsion composition that is stable during production. According to the treatment method of the present invention, a method for treating hair and / or skin using the emulsion composition of the present invention can be provided. [Brief explanation of the drawings]

[0024] [Figure 1] Appearance photographs of the emulsion composition 3 hours after production, stored at room temperature (15 days), and stored at 50°C (15 days) (Example 1, Comparative Example 1 (only 3 hours after production), Reference Examples A and B). [Figure 2] Photographs of the appearance of the emulsion composition taken 3 hours after production, after storage at room temperature (15 days), and after storage at 50°C (15 days) (Examples 2 to 5, Comparative Example 2 (only 3 hours after production)). [Figure 3] Photographs of the appearance of the emulsion composition taken 3 hours after production, after storage at room temperature (15 days), and after storage at 50°C (15 days) (Examples 6 to 9, Comparative Example 2 (only 3 hours after production)). [Figure 4] Photographs of the appearance of the emulsion composition taken 3 hours after production, after storage at room temperature (15 days), and after storage at 50°C (15 days) (Examples 10 to 12, Comparative Example 2 (only 3 hours after production)). [Figure 5] Photographs of the appearance of the emulsion composition taken 3 hours after production, after storage at room temperature (15 days), and after storage at 50°C (15 days) (Examples 13 to 16, Comparative Example 3 (only 3 hours after production)). [Figure 6] Photographs of the appearance of the emulsion composition 3 hours after production, stored at room temperature (15 days), and stored at 50°C (15 days) (Examples 17 and 18, Comparative Example 4 (only 3 hours after production)). [Figure 7] Photographs of the appearance of the emulsion composition 3 hours after production, stored at room temperature (15 days), and stored at 50°C (15 days) (Examples 2 and 19, Comparative Example 5 (only 3 hours after production)). [Figure 8] Photographs of the appearance of the emulsion composition taken 3 hours after production, after storage at room temperature (15 days), and after storage at 50°C (15 days) (Examples 1, 2, and 20 to 22). [Figure 9]Photographs of the appearance of the emulsion composition taken 3 hours after production, after storage at room temperature (15 days), and after storage at 50°C (15 days) (Examples 2, 23, and 24). [Figure 10] Photographs of the appearance of the emulsion composition taken 3 hours after production, after storage at room temperature (15 days), and after storage at 50°C (15 days) (Examples 25 to 29). [Figure 11] Photographs of hair strands 24 hours after styling using each of the emulsion compositions of Examples 2 and 25 to 27. DETAILED DESCRIPTION OF THE INVENTION

[0025] The present invention will be described below based on an embodiment of the present invention (hereinafter referred to as "the present embodiment").

[0026] <Emulsified composition> The emulsion composition of the present embodiment comprises: (A) one or more selected from the following (A1) to (A14): (A1) a polyoxyethylene alkyl ether having an alkyl group having 16 or more carbon atoms and having an average number of moles of oxyethylene added of 10 or more; (A2) polyoxyethylene alkylene ether, (A3) polyoxyethylene lauryl ether, (A4) polyoxyethylene phytosterol ether, (A5) polyoxyethylene polyoxypropylene alkyl ether, (A6) Polyoxyethylene hydrogenated castor oil, (A7) fatty acid N-methylethanolamide, (A8) tetra fatty acid polyoxyethylene sorbitan, (A9) tri-fatty acid polyoxyethylene glyceryl, (A10) polyoxyethylene alkyl ether carboxylic acid or a salt thereof, (A11) Polyoxyethylene alkyl ether sulfate or a salt thereof, (A12) N-acylmethylalanine or a salt thereof, (A13) α-olefin sulfonic acid or a salt thereof, (A14) mono-long chain alkyltrimethylammonium salt, (B) Silicone that is liquid at 25°C; (C) one or more selected from vegetable oils, liquid ester oils, and liquid waxes; and (D) Water; is blended, The blending amount of (D) water is 25% by mass or less.

[0027] In the following description, one or more components selected from the above (A1) to (A14) may be collectively referred to as "component (A)," silicone that is liquid at 25°C may be collectively referred to as "component (B)," one or more components selected from vegetable oil, liquid ester oil, and liquid wax may be collectively referred to as "component (C)," and water may be collectively referred to as "component (D)."

[0028] [Component (A)] The emulsion composition of this embodiment contains, as component (A), one or more selected from the following (A1) to (A14): (A1) Polyoxyethylene alkyl ether having an alkyl group having 16 or more carbon atoms and an average number of moles of oxyethylene added of 10 or more (A2) Polyoxyethylene alkylene ether (A3) Polyoxyethylene lauryl ether (A4) Polyoxyethylene phytosterol ether (A5) Polyoxyethylene polyoxypropylene alkyl ether (A6) Polyoxyethylene hydrogenated castor oil (A7) Fatty acid N-methylethanolamide (A8) Tetra-fatty acid polyoxyethylene sorbitol (A9) Tri-fatty acid polyoxyethylene glyceryl (A10) Polyoxyethylene alkyl ether carboxylic acid or its salt (A11) Polyoxyethylene alkyl ether sulfate or its salt (A12) N-acylmethylalanine or its salt (A13) α-olefin sulfonic acid or its salt (A14) Mono-long chain alkyl trimethyl ammonium salt

[0029] (A1) Polyoxyethylene alkyl ether having an alkyl group having 16 or more carbon atoms and an average number of moles of oxyethylene added of 10 or more The emulsion composition of the present embodiment may contain, as component (A), one or more polyoxyethylene alkyl ethers (hereinafter sometimes referred to as "(A1)") having an alkyl group having 16 or more carbon atoms and an average number of moles of oxyethylene added of 10 or more.

[0030] (A1) may be, for example, one represented by the following general formula (1). R 1 -O-(CH2CH2O) a -H (1) [In the above general formula (1), R 1 represents a linear or branched saturated hydrocarbon group having from 16 to 24 carbon atoms, and a represents the average number of moles of oxyethylene added, which is from 10 to 200 (preferably from 25 to 200).

[0031] Examples of (A1) include polyoxyethylene cetyl ether having an average number of moles of oxyethylene added of 10 to 200, polyoxyethylene stearyl ether having an average number of moles of oxyethylene added of 10 to 200, polyoxyethylene behenyl ether having an average number of moles of oxyethylene added of 10 to 200, polyoxyethylene isocetyl ether having an average number of moles of oxyethylene added of 10 to 200, polyoxyethylene isostearyl ether having an average number of moles of oxyethylene added of 10 to 200, and polyoxyethylene decyltetradecaisostearyl ether having an average number of moles of oxyethylene added of 10 to 200.

[0032] Examples of ingredient names for cosmetics (A1) include ceteth-10, ceteth-12, ceteth-13, ceteth-14, ceteth-15, ceteth-16, ceteth-17, ceteth-18, ceteth-20, ceteth-23, ceteth-24, ceteth-25, ceteth-30, ceteth-40, ceteth-45, ceteth-150, steareth-10, steareth-11, Steareth-12, Steareth-13, Steareth-14, Steareth-15, Steareth-16, Steareth-17, Steareth-18, Steareth-20, Steareth-21, Steareth-25, Steareth-27, Steareth-30, Steareth-40, Steareth-50, Steareth-80, Steareth-100, Steareth-200, Examples of suitable oleic acid include beheneth-10, beheneth-15, beheneth-20, beheneth-25, beheneth-30, isoceteth-10, isoceteth-12, isoceteth-15, isoceteth-20, isoceteth-25, isoceteth-30, isosteareth-10, isosteareth-12, isosteareth-15, isosteareth-16, isosteareth-20, isosteareth-22, isosteareth-25, octyldodeceth-2, octyldodeceth-5, octyldodeceth-10, octyldodeceth-16, octyldodeceth-20, octyldodeceth-25, octyldodeceth-30, decyltetradeceth-10, decyltetradeceth-15, decyltetradeceth-20, and decyltetradeceth-25.

[0033] Among (A1), from the viewpoint of excellent storage stability when stored at room temperature and at 50°C, the emulsion composition of this embodiment is preferably one containing one or more polyoxyethylene alkyl ethers having an alkyl group of 16 or more carbon atoms and an average number of moles of oxyethylene added of 15 or more, and more preferably one containing one or more polyoxyethylene alkyl ethers having an alkyl group of 16 or more carbon atoms and an average number of moles of oxyethylene added of 20 or more.

[0034] Furthermore, from the viewpoint of excellent storage stability when stored at room temperature and when stored at 50°C, the emulsion composition of this embodiment preferably contains, as (A1), one or more selected from polyoxyethylene cetyl ether having an average number of moles of oxyethylene added of 20 or more, polyoxyethylene stearyl ether having an average number of moles of oxyethylene added of 20 or more, and polyoxyethylene behenyl ether having an average number of moles of oxyethylene added of 20 or more.

[0035] (A2) Polyoxyethylene alkylene ether The emulsion composition of the present embodiment may contain one or more polyoxyethylene alkylene ethers (hereinafter, sometimes referred to as "(A2)") as the component (A).

[0036] (A2) may be, for example, one represented by the following general formula (2). R 2 -O-(CH2CH2O) b -H (2) [In the above general formula (2), R 2 represents a linear or branched unsaturated hydrocarbon group having 16 to 22 carbon atoms, and b is the average number of moles of oxyethylene added, which is more than 0 and 200 or less.

[0037] Examples of (A2) include polyoxyethylene oleyl ethers having an average number of moles of oxyethylene added of 1 or more and 200 or less.

[0038] Examples of ingredient names for cosmetics (A2) include oleth-2, oleth-3, oleth-4, oleth-5, oleth-6, oleth-7, oleth-8, oleth-9, oleth-10, oleth-11, oleth-12, oleth-13, oleth-15, oleth-16, oleth-20, oleth-23, oleth-25, oleth-30, oleth-35, oleth-40, oleth-44, oleth-45, oleth-50, oleth-82, oleth-100, oleth-106, and oleth-110.

[0039] In the emulsion composition of the present embodiment, (A2) is preferably a blend of one or more polyoxyethylene oleyl ethers having an average number of moles of oxyethylene added of 20 or more, from the viewpoint of excellent storage stability when stored at room temperature and when stored at 50°C.

[0040] (A3) Polyoxyethylene lauryl ether The emulsion composition of this embodiment may contain one or more polyoxyethylene lauryl ethers (hereinafter, sometimes referred to as "(A3)") as component (A).

[0041] (A3) may be, for example, one represented by the following general formula (3). C 12 H 24 -O-(CH2CH2O) c -H (3) [In the above general formula (3), c represents the average number of moles of oxyethylene added, and is greater than 0 and not greater than 200.]

[0042] Examples of (A3) include polyoxyethylene lauryl ethers having an average number of moles of oxyethylene added of 1 or more and 200 or less.

[0043] Examples of ingredient names for cosmetics (A3) include laureth-1, laureth-2, laureth-3, laureth-4, laureth-5, laureth-6, laureth-7, laureth-8, laureth-9, laureth-10, laureth-11, laureth-12, laureth-13, laureth-14, laureth-15, laureth-16, laureth-20, laureth-21, laureth-23, laureth-24, laureth-25, laureth-30, laureth-38, laureth-40, laureth-50, and laureth-100.

[0044] (A4) Polyoxyethylene phytosterol ether The emulsion composition of the present embodiment may contain one or more polyoxyethylene phytosterol ethers (hereinafter, sometimes referred to as "(A4)") as component (A).

[0045] (A4) may be, for example, one represented by the following general formula (4). R 3 -O-(CH2CH2O) d -H (4) [In the above general formula (4), R 3 represents a phytosteryl group, and d represents the average number of moles of oxyethylene added, which is greater than 0 and 60 or less.

[0046] Examples of (A4) include polyoxyethylene phytosterol ethers having an average number of moles of oxyethylene added of 1 or more and 60 or less.

[0047] Examples of the ingredient names of (A4) cosmetics include PEG-5 phytosterol, PEG-10 phytosterol, PEG-15 phytosterol, PEG-20 phytosterol, PEG-25 phytosterol, and PEG-30 phytosterol.

[0048] (A5) Polyoxyethylene polyoxypropylene alkyl ether The emulsion composition of the present embodiment may contain, as component (A), one or more polyoxyethylene polyoxypropylene alkyl ethers (hereinafter, sometimes referred to as "(A5)").

[0049] (A5) may be, for example, one represented by the following general formula (5). R 4 -O-(CH2CH(CH3)O) e -(CH2CH2O) f -H (5) [In the above general formula (5), R 4represents a linear or branched, saturated hydrocarbon group having from 8 to 22 carbon atoms, e represents the average number of moles of oxyethylene added and is more than 0 and not more than 60, and f represents the average number of moles of oxypropylene added and is more than 0 and not more than 60.]

[0050] Examples of (A5) include polyoxyethylene polyoxypropylene lauryl ether having an average number of moles of oxyethylene added of 1 to 60 and an average number of moles of oxypropylene added of 1 to 60; polyoxyethylene polyoxypropylene cetyl ether having an average number of moles of oxyethylene added of 1 to 60 and an average number of moles of oxypropylene added of 1 to 60; polyoxyethylene polyoxypropylene stearyl ether having an average number of moles of oxyethylene added of 1 to 60 and an average number of moles of oxypropylene added of 1 to 60; and polyoxyethylene polyoxypropylene behenyl ether having an average number of moles of oxyethylene added of 1 to 60 and an average number of moles of oxypropylene added of 1 to 60.

[0051] Examples of the ingredient names of the cosmetics of (A5) include PPG-1 deceth-4, PPG-1 deceth-5, PPG-1 deceth-6, PPG-1 deceth-7, PPG-2 deceth-3, PPG-2 deceth-5, PPG-2 deceth-7, PPG-2 deceth-10, PPG-2 deceth-12, PPG-2 deceth-15, PPG-2 deceth-20, PPG-2 deceth-30, PPG-1 isodeceth-4, PPG-1 isodeceth-6, PPG-1 isodeceth-7, PPG-1 isodeceth-9, PPG-2 isodeceth-4, PPG-2 isodeceth-6, PPG-2 isodeceth-8, PPG-2 isodeceth-10, PPG-2 isodeceth-12, PPG-2 isodeceth-18, PPG-2 Isodeceth-25, PPG-4 Isodeceth-10, PPG-2(C9-11) Palace-5, PPG-2(C9-11) Palace-7, PPG-2(C9-11) Palace-8, PPG-2(C9-11) Palace-11, PPG-6(C9-11) Palace-5, PPG-2 Laureth-5, PPG-2 Laureth-8, PPG-2 Laureth -12, PPG-3 Laureth-8, PPG-3 Laureth-9, PPG-3 Laureth-10, PPG-4 Laureth-15, PPG-5 Laureth-5, PPG-5 Laureth-6, PPG-6 Laureth-3, PPG-20 Laureth-12, PPG-25 Laureth-25, PPG-1 Trideceth-6, PPG-6 Trideceth-8, PPG-2(C12,13) Palace-8, PPG-3 (C12-14) s-Palace-7, PPG-4 (C12-14) s-Palace-5, PPG-5 (C12-14) s-Palace-7, PPG-5 (C12-14) s-Palace-9, PPG-1 Seteth-1, PPG-1 Seteth-5, PPG-1 Seteth-10, PPG-1 Seteth-20, PPG-2 Seteth-1, PPG-2 Seteth-5, PPG-2 Seteth-10, PPG-2 Seteth-12, PPG-2 Seteth-20, PPG-4 Seteth-1, PPG-4 Seteth-5, PPG-4 Seteth-10, PPG-4 Seteth-20, PPG-5 Seteth-20, P Examples include PG-8 ceteth-1, PPG-8 ceteth-2, PPG-8 ceteth-5, PPG-8 ceteth-10, PPG-8 ceteth-20, PPG-9 steareth-3, PPG-23 steareth-34, PPG-30 steareth-4, PPG-34 steareth-3, PPG-38 steareth-6, PPG-6 (C12-18) pareth-11, PPG-1 beheneth-15, PPG-6 decyltetradeceth-12, PPG-6 decyltetradeceth-20, PPG-6 decyltetradeceth-30, PPG-13 decyltetradeceth-24, and PPG-20 decyltetradeceth-10.

[0052] (A6) Polyoxyethylene hydrogenated castor oil The emulsion composition of this embodiment may contain one or more polyoxyethylene hydrogenated castor oils (hereinafter, sometimes referred to as "(A6)") as component (A).

[0053] (A6) may be, for example, one represented by the following general formula (6). [ka] [In the above general formula (6), the sum of g, h, i, j, k, and l represents the average number of moles of oxyethylene added. The average number of moles of oxyethylene added is, for example, more than 20 and 200 or less.]

[0054] Examples of (A6) include polyoxyethylene hydrogenated castor oil having an average number of moles of oxyethylene added of 25 or more and 200 or less.

[0055] Examples of ingredient names for cosmetics (A6) include PEG-25 hydrogenated castor oil, PEG-30 hydrogenated castor oil, PEG-35 hydrogenated castor oil, PEG-40 hydrogenated castor oil, PEG-45 hydrogenated castor oil, PEG-50 hydrogenated castor oil, PEG-54 hydrogenated castor oil, PEG-55 hydrogenated castor oil, PEG-60 hydrogenated castor oil, PEG-65 hydrogenated castor oil, PEG-80 hydrogenated castor oil, PEG-100 hydrogenated castor oil, and PEG-200 hydrogenated castor oil.

[0056] (A7) Fatty acid N-methylethanolamide The emulsion composition of this embodiment may contain one or more fatty acid N-methylethanolamides (hereinafter, sometimes referred to as "(A7)") as component (A). The fatty acid N-methylethanolamides are represented by the following general formula (7): R 5 CO-N(CH3)-CH2CH2OH (7) [In the above general formula (7), R 5 represents a linear or branched, saturated or unsaturated hydrocarbon group having from 8 to 22 carbon atoms.

[0057] (A7) includes, for example, coconut oil fatty acid N-methylethanolamide.

[0058] An example of the ingredient name of the cosmetic product (A7) is cocamidomethyl MEA.

[0059] (A8) Tetra-fatty acid polyoxyethylene sorbitol The emulsion composition of this embodiment may contain one or more types of tetra fatty acid polyoxyethylene sorbitol (hereinafter, sometimes referred to as "(A8)") as component (A).

[0060] (A8) may be, for example, one represented by the following general formula (8). [ka] [In the above general formula (8), R 6 , R 7 , R 8 , R 9 , R 10 , R 11 is H or COR', and R' is a saturated or unsaturated hydrocarbon group having a straight or branched chain with 12 to 24 carbon atoms. 6 , R 7 , R 8 , R 9 , R 10 , R 11 any two of these are H. m, n, o, p, q, and r represent the average number of moles of oxyethylene added, and the sum of m, n, o, p, q, and r is, for example, more than 0 and 55 or less.]

[0061] Examples of (A8) include polyoxyethylene sorbitol tetraoleate having an average number of moles of oxyethylene added of 1 to 55, polyoxyethylene sorbitol tetrastearate having an average number of moles of oxyethylene added of 1 to 55, and polyoxyethylene sorbitol tetraisostearate having an average number of moles of oxyethylene added of 1 to 55.

[0062] Examples of ingredient names for cosmetics (A8) include sorbeth-4 tetraoleate, sorbeth-6 tetraoleate, sorbeth-30 tetraoleate, sorbeth-40 tetraoleate, sorbeth-20 tetraisostearate, sorbeth-30 tetraisostearate, sorbeth-40 tetraisostearate, and sorbeth-50 tetraisostearate.

[0063] (A9) Tri-fatty acid polyoxyethylene glyceryl The emulsion composition of this embodiment may contain one or more types of tri-fatty acid polyoxyethylene glyceryl (hereinafter, sometimes referred to as "(A9)") as component (A).

[0064] (A9) may be, for example, one represented by the following general formula (9). [ka] [In the above general formula (9), R 12 , R 13 , R 14 represents a saturated or unsaturated hydrocarbon group having a straight or branched chain and having 12 to 24 carbon atoms. 6 , R 7 , R 8 , R 9 , R 10 , R 11 any two of these are H. In addition, in the general formula (8), s, t, and u represent the average number of moles of oxyethylene added, and the sum of s, t, and u is, for example, more than 0 and 100 or less.]

[0065] Examples of (A9) include polyoxyethylene glyceryl trilaurate having an average number of moles of oxyethylene added of 1 to 100, polyoxyethylene glyceryl trioleate having an average number of moles of oxyethylene added of 1 to 100, polyoxyethylene glyceryl tristearate having an average number of moles of oxyethylene added of 1 to 100, and polyoxyethylene glyceryl triisostearate having an average number of moles of oxyethylene added of 1 to 100.

[0066] Examples of ingredient names for cosmetics (A9) include PEG-8 glyceryl trilaurate, PEG-3 glyceryl trioleate, PEG-5 glyceryl trioleate, PEG-10 glyceryl trioleate, PEG-20 glyceryl trioleate, PEG-25 glyceryl trioleate, PEG-30 glyceryl trioleate, PEG-40 glyceryl trioleate, PEG-50 glyceryl trioleate, PEG-60 glyceryl trioleate, PEG-3 glyceryl tristearate, PEG-4 glyceryl tristearate, PEG-5 glyceryl tristearate, PEG-6 glyceryl tristearate, and PEG-6 glyceryl tristearate. PEG-10 glyceryl tristearate, PEG-13 glyceryl tristearate, PEG-15 glyceryl tristearate, PEG-20 glyceryl tristearate, PEG-140 glyceryl tristearate, PEG-3 glyceryl triisostearate, PEG-5 glyceryl triisostearate, PEG-10 glyceryl triisostearate, PEG-15 glyceryl triisostearate, PEG-20 glyceryl triisostearate, PEG-30 glyceryl triisostearate, PEG-40 glyceryl triisostearate, PEG-50 glyceryl triisostearate, PEG-60 glyceryl triisostearate.

[0067] (A10) Polyoxyethylene alkyl ether carboxylic acid or salt thereof The emulsion composition of this embodiment may contain, as component (A), one or more polyoxyethylene alkyl ether carboxylic acids or salts thereof (hereinafter, sometimes referred to as "(A10)").

[0068] (A10) may be, for example, one represented by the following general formula (10). R 15 -(OCH2CH2) v -OCH2COOX 1 (10) [In the above general formula (10), R 15represents a linear or branched saturated hydrocarbon group having 8 to 22 carbon atoms; v represents the average number of moles of oxyethylene added, and is greater than 0 and less than 20; X 1 represents a hydrogen atom, an alkali metal, an alkanolamine, or a basic amino acid.

[0069] Examples of (A10) include polyoxyethylene lauryl ether carboxylic acid or a salt thereof having an average number of moles of oxyethylene added of 1 to 20, polyoxyethylene tridecyl ether carboxylic acid or a salt thereof having an average number of moles of oxyethylene added of 1 to 20, and polyoxyethylene myristyl ether carboxylic acid or a salt thereof having an average number of moles of oxyethylene added of 1 to 20.

[0070] Examples of ingredient names for cosmetics (A10) include laureth-3 carboxylic acid (laureth-3 acetic acid), sodium laureth-3 carboxylic acid (sodium laureth-3 acetate), potassium laureth-3 carboxylic acid (potassium laureth-3 acetate), laureth-3 carboxylic acid TIPA, laureth-4 carboxylic acid (laureth-4 acetic acid), sodium laureth-4 carboxylic acid (sodium laureth-4 acetate), potassium laureth-4 carboxylic acid (potassium laureth-4 acetate), potassium laureth-4 carboxylic acid (potassium laureth-4 acetate), potassium laureth-4.5 carboxylic acid (laureth-5 acetic acid), potassium laureth-5 carboxylic acid (potassium laureth-5 acetate), sodium laureth-5 carboxylic acid (sodium laureth-5 acetate), laureth-6 carboxylic acid (laureth-6 acetic acid), potassium laureth-6 carboxylic acid (potassium laureth-6 acetate), sodium laureth-6 carboxylic acid (sodium laureth-6 acetate), laureth-8 carboxylic acid, laureth- Examples of suitable carboxylic acids include sodium laureth-8 carboxylate, laureth-10 carboxylic acid (laureth-10 acetic acid), potassium laureth-10 carboxylate (potassium laureth-10 acetate), laureth-11 carboxylic acid, sodium laureth-11 carboxylate (sodium laureth-11 acetate), laureth-12 carboxylic acid, sodium laureth-12 carboxylate, laureth-13 carboxylic acid, sodium laureth-13 carboxylate (sodium laureth-13 acetate), laureth-14 carboxylic acid, sodium laureth-13 carboxylate (sodium laureth-13 acetate), sodium laureth-14 carboxylate (sodium laureth-14 acetate), sodium laureth-16 carboxylate (sodium laureth-16 acetate), laureth-17 carboxylic acid, sodium laureth-17 carboxylate (sodium laureth-17 acetate), myreth-3 carboxylic acid, myreth-5 carboxylic acid, and (C12-14)s-pareth-8 carboxylate.

[0071] (A11) Polyoxyethylene alkyl ether sulfate or its salt The emulsion composition of this embodiment may contain, as component (A), one or more types of polyoxyethylene alkyl ether sulfate or a salt thereof (hereinafter, sometimes referred to as "(A11)").

[0072] (A11) may be, for example, one represented by the following general formula (11). R 16 -O-(CH2CH2O)w -SO3X 2 (11) [In the above general formula (11), R 16 represents a linear or branched saturated hydrocarbon group having 8 to 22 carbon atoms; w represents the average number of moles of oxyethylene added, and is greater than 0 and less than 20; X 2 represents a hydrogen atom, an alkali metal, an alkanolamine, or a basic amino acid.

[0073] Examples of (A11) include polyoxyethylene lauryl ether sulfate or a salt thereof having an average number of moles of oxyethylene added of 1 to 20, and polyoxyethylene myristyl ether sulfate or a salt thereof having an average number of moles of oxyethylene added of 1 to 20.

[0074] Examples of ingredient names for cosmetics (A11) include sodium laureth sulfate, magnesium laureth sulfate, TEA laureth sulfate, MIPA laureth sulfate, TIPA laureth sulfate, arginine laureth sulfate, ammonium laureth sulfate, TEA laureth-3 sulfate, ammonium laureth-2 sulfate, ammonium laureth-3 sulfate, PEG-4 DEA lauryl sulfate, sodium laureth-5 sulfate, sodium laureth-7 sulfate, sodium laureth-8 sulfate, magnesium laureth-8 sulfate, sodium laureth-12 sulfate, sodium laureth-40 sulfate, sodium trideceth sulfate, polyoxyethylene sodium tridecyl sulfate, (C12,13) ​​palace sulfate, Examples include sodium myreth-3 sulfate, (C12,13) ​​sodium myreth-3 sulfate, (C12,13) ​​TEA-myreth-3 sulfate, (C12,13) ​​sodium myreth-3 sulfate (TEA / Na), (C12,13) ​​DEA-myreth-3 sulfate, sodium myreth-3 sulfate, sodium myreth-4 sulfate, sodium coceth sulfate, magnesium coceth sulfate, zinc coceth sulfate, (C10-15) sodium myreth-3 sulfate, (C11-15) TEA-myreth-3 sulfate, (C11-15) sodium myreth-3 sulfate, (C11,13,15) sodium myreth-1 sulfate, (C11,13,15) TEA-myreth-1 sulfate, (C12-14) sodium myreth-3 sulfate, and (C12-14) sodium s-myreth-3 sulfate.

[0075] (A12) N-Acylmethylalanine or a salt thereof The emulsion composition of the present embodiment contains, as component (A), N-acylmethylalanine or a salt thereof. (hereinafter, sometimes referred to as "(A12)") may be blended in one or more types.

[0076] (A12) may be, for example, one represented by the following general formula (12). R 17 -CO-N(CH3)-CH2CH2COOX 3 (12) [In the above general formula (12), R 17 represents a linear or branched saturated hydrocarbon group having 8 to 22 carbon atoms, and X 3 represents a hydrogen atom, an alkali metal, an alkanolamine, or a basic amino acid.

[0077] Examples of (A12) include N-lauroylmethylalanine or a salt thereof, N-myristoylmethylalanine or a salt thereof, and N-coconut oil fatty acid methylalanine or a salt thereof.

[0078] Examples of ingredient names for (A12) cosmetics include lauroyl methyl alanine, sodium lauroyl methyl alanine, potassium lauroyl methyl alanine, tea-derived lauroyl methyl alanine, sodium myristoyl methyl alanine, cocoyl methyl alanine, and sodium cocoyl methyl alanine.

[0079] (A13) α-Olefin sulfonic acid or a salt thereof The emulsion composition of this embodiment may contain one or more α-olefin sulfonic acids or salts thereof (hereinafter, sometimes referred to as "(A13)") as component (A). The α-olefin sulfonic acids or salts thereof are alkyl sulfonic acids or salt adducts thereof in which an α-olefin having from 10 to 20 carbon atoms is sulfonated. Examples of salts include sodium salts, potassium salts, and alkanolamine salts.

[0080] Examples of (A13) include α-olefin sulfonic acids in which an α-olefin having 12 to 18 carbon atoms is sulfonated, and salts thereof (such as sodium tetradecene sulfonate).

[0081] Examples of the ingredient names for (A13) cosmetics include sodium olefin (C12-14) sulfonate, sodium olefin (C14-16) sulfonate, sodium olefin (C14-18) sulfonate, and sodium olefin (C16-18) sulfonate.

[0082] (A14) Mono-long-chain alkyltrimethylammonium salt The emulsion composition of this embodiment may contain, as component (A), one or more types of mono-long-chain alkyltrimethylammonium salts (hereinafter, sometimes referred to as "(A14)").

[0083] (A14) may be, for example, one represented by the following general formula (13). R 18 -N + (CH3)3Y - (13) [In the above general formula (13), R 18 represents an alkyl group having 12 to 22 carbon atoms (preferably 14 to 22, more preferably 20 to 22), and Y - represents the ionized form of a halogen atom (e.g., chlorine, bromine, iodine), the ionized form of methosulfate (CH3SO4), or the ionized form of saccharin.]

[0084] Of the (A14) emulsion compositions of this embodiment, those containing one or more mono-long-chain alkyltrimethylammonium salts having 20 or more carbon atoms are preferred, from the viewpoint of excellent storage stability when stored at room temperature and at 50°C.

[0085] Examples of (A14) include lauryltrimethylammonium salt, myristyltrimethylammonium salt, cetyltrimethylammonium salt, stearyltrimethylammonium salt, and behenyltrimethylammonium salt.

[0086] Examples of the ingredient names of (A14) cosmetics include lauryltrimonium chloride, laurtrimonium bromide, cetrimonium chloride, cetrimonium bromide, cetrimonium methosulfate, cetrimonium saccharin, myrtrimonium bromide, steartrimonium chloride, steartrimonium bromide, stearyltrimonium bromide, steartrimonium methosulfate, stearyltrimonium saccharin, cetearitrimonium chloride, behentrimonium chloride, behentrimonium methosulfate, hydrogenated palmtrimonium chloride, and soytrimonium chloride.

[0087] In order to achieve excellent storage stability when stored at room temperature, the emulsion composition of this embodiment preferably contains, as component (A), one or more selected from (A1) to (A12) and (A14), more preferably one or more selected from (A1) to (A8), (A10), (A11) and (A14), and even more preferably one or more selected from (A1) to (A7), (A10), (A11) and (A14).

[0088] Furthermore, from the viewpoint of excellent storage stability when stored at room temperature and at 50°C, the emulsion composition of this embodiment preferably contains, as component (A), one or more selected from mono-long-chain alkyltrimethylammonium salts having 20 or more carbon atoms among (A1) to (A7), (A10), (A11), and (A14), more preferably one or more selected from (A1), (A2), (A4) to (A7), and (A10), even more preferably one or more selected from (A1), (A2), and (A4) to (A7), and particularly preferably one or more selected from polyoxyethylene alkyl ethers (A1) having an alkyl group having 16 or more carbon atoms and having an average number of oxyethylene added moles of 15 or more, and (A2), and (A4) to (A7).

[0089] The amount of component (A) blended in the emulsion composition of this embodiment is not particularly limited and may be set appropriately.

[0090] The blending amount of component (A) in the emulsion composition of this embodiment is, for example, 0.05% by mass or more, but from the viewpoint of further improving the storage stability of the emulsion composition, it is preferably 0.1% by mass or more, and more preferably 0.3% by mass or more.

[0091] The blending amount of component (A) in the emulsion composition of this embodiment is, for example, 10% by mass or less, but from the viewpoint of further increasing the viscosity of the emulsion composition, it is preferably 8% by mass or less, and more preferably 5% by mass or less.

[0092] The blending amount of component (A) in the emulsion composition of this embodiment ranges, for example, from 0.05% by mass to 10% by mass, but from the viewpoints described above, the blending amount of component (A) is preferably from 0.1% by mass to 8% by mass, and more preferably from 0.3% by mass to 5% by mass.

[0093] When the emulsion composition of this embodiment contains at least (A14) as component (A), the amount of (A14) in the emulsion composition of this embodiment is, for example, 0.8% by mass or more and 10% by mass or less. From the viewpoint of further improving emulsion stability, the amount of (A14) in the above case is preferably 1% by mass or more.

[0094] [(B) Component] The emulsion composition of this embodiment contains one or more silicones that are liquid at 25°C as component (B).

[0095] The term "liquid" means that the substance has fluidity when left standing at 25°C (hereinafter, the term "liquid" will be used in the same sense).

[0096] As the component (B) blended in the emulsion composition of this embodiment, for example, a silicone having a melting point of 20° C. or less can be used.

[0097] As component (B), any known silicone that is liquid at 25°C and can be incorporated into cosmetics can be used.

[0098] Examples of component (B) include volatile silicones that are liquid at 25° C. and non-volatile silicones that are liquid at 25° C. Examples of volatile silicones that are liquid at 25° C. include silicones with a kinematic viscosity of 5 mm at 25° C. 2 A liquid silicone at 25°C with a kinematic viscosity of 5 mm / s or less can be used. 2 Liquid silicone having a kinematic viscosity exceeding 1 / s can be used. The kinematic viscosity at 25°C is a value measured at 25°C in accordance with the Quasi-drug Ingredients Standards 2021, General Test Method, Viscosity Measurement Method 1.

[0099] The volatile silicone that is liquid at 25°C is, for example, a silicone having a kinematic viscosity of 5mm at 25°C. 2 / s or less linear siloxane (kinematic viscosity at 25°C is 2mm 2 / s or less), dimethicone, disiloxane, trisiloxane, etc.), kinematic viscosity at 25°C 5mm 2 / s or less cyclic siloxanes (cyclotetrasiloxane, cyclopentasiloxane, cyclohexasiloxane, etc.), kinematic viscosity at 25°C of 5mm 2 Alkyl methicone (ethyl methicone, caprylyl methicone, etc.) with a kinematic viscosity of 5mm / s or less at 25°C 2 Examples include branched siloxanes (such as methyl trimethicone) with a maximum of / s.

[0100] The non-volatile silicone that is liquid at 25°C is, for example, dimethyl silicone (kinematic viscosity at 25°C is 5 mm 2 / s or more (including highly polymerized dimethicone with an average degree of polymerization of 650 or more)), amino-modified silicone (amodimethicone (including highly polymerized amodimethicone with an average degree of polymerization of 650 or more), aminopropyl dimethicone (amodimethicone (including highly polymerized aminopropyl dimethicone with an average degree of polymerization of 650 or more), Quaternium-80, Silicone Quaternium-22, etc.), amino-polyether-modified silicone ((bisisobutyl PEG-14 / amodimethicone) copolymer, methoxy PEG / PPG-7 / 3 aminopropyl dimethicone, etc.), aminophenyl-modified silicone (for example, aminopropyl phenyl trimethicone, etc.), phenyl-modified silicone (phenyl trimethicone, diphenyl dimethicone, phenylpropyl dimethylsiloxysilicate, etc.), silanol group-containing silicone (kinematic viscosity of 5mm at 25°C or more) 2 / s or more dimethiconol (including highly polymerized dimethiconol with an average degree of polymerization of 650 or more)), long-chain alkyl-modified silicone (cetyl dimethicone, stearoxy dimethicone, stearoxymethyl polysiloxane, (stearoxymethicone / dimethicone) copolymer, etc.), polyether-modified silicone (for example, PEG-9 polydimethylsiloxyethyl dimethicone, lauryl PEG-9 polydimethylsiloxyethyl dimethicone, PEG-12 dimethicone, PEG-32 methyl ether dimethicone, PEG / PPG-20 / 22 butyl ether dimethicone, Cetyl PEG / PPG-10 / 1 Dimethicone, PEG / PPG-25 / 25 Dimethicone, etc.), silicone 3D crosslinked products ((vinyl dimethicone / lauryl dimethicone) crosspolymer, (lauryl polydimethylsiloxyethyl dimethicone / bisvinyl dimethicone) crosspolymer, (dimethicone / vinyl dimethicone) crosspolymer, (dimethicone / phenyl vinyl dimethicone) crosspolymer, etc.), silicones with betaine groups (dimethicone propyl PG betaine, etc.) (The ingredient names given in parentheses above are all the ingredient names listed on the cosmetic product label).

[0101] From the viewpoint of increasing the viscosity of the emulsion composition, the emulsion composition of this embodiment preferably contains, as component (B), one or more highly polymerized silicones having an average degree of polymerization of 650 or more. Examples of highly polymerized silicones having an average degree of polymerization of 650 or more include dimethyl silicones having an average degree of polymerization of 650 or more (such as highly polymerized dimethicones having an average degree of polymerization of 650 or more), amino-modified silicones having an average degree of polymerization of 650 or more (such as highly polymerized amodimethicones having an average degree of polymerization of 650 or more, and highly polymerized aminopropyl dimethicones having an average degree of polymerization of 650 or more), and silanol group-containing silicones having an average degree of polymerization of 650 or more (such as highly polymerized dimethiconols having an average degree of polymerization of 650 or more).

[0102] From the viewpoint of realizing a smooth feel when running your fingers through your hair, the emulsion composition of this embodiment preferably contains, as component (B), one or more volatile silicones that are liquid at 25°C. Furthermore, from the viewpoint of further realizing a smooth feel when running your fingers through your hair, the volatile silicones that are liquid at 25°C preferably have a kinematic viscosity of 5mmHg at 25°C. 2 Silicone that is liquid at 25°C is preferred, and its kinematic viscosity at 25°C is 3mm / s or less. 2 Silicones that are liquid at 25°C or below are more preferred.

[0103] From the viewpoint of achieving a smooth, runny feel on hair while increasing the viscosity of the emulsion composition, the emulsion composition of this embodiment preferably contains, as component (B), one or more highly polymerized silicones having an average degree of polymerization of 650 or more and one or more volatile silicones that are liquid at 25°C.

[0104] The amount of component (B) blended in the emulsion composition of this embodiment is not particularly limited and may be set appropriately.

[0105] The blending amount of component (B) in the emulsion composition of the present embodiment is, for example, 40% by mass or more, but from the viewpoint of improving the smoothness when running your hands through the hair after treatment, it is preferably 50% by mass or more, and more preferably 55% by mass or more.

[0106] The blending amount of component (B) in the emulsion composition of the present embodiment is, for example, 90% by mass or less, but from the viewpoint of improving the moisturized feel of the hair when touched with the hands after treatment on the hair, 85% by mass or less is preferred, and 80% by mass or less is more preferred.

[0107] The blending amount of component (B) in the emulsion composition of this embodiment ranges, for example, from 40% by mass to 90% by mass. However, from the viewpoints described above, the blending amount of component (B) is preferably from 50% by mass to 85% by mass, and more preferably from 55% by mass to 80% by mass.

[0108] [(C) component] The emulsion composition of the present embodiment contains, as component (C), one or more selected from vegetable oils, liquid ester oils, and liquid waxes.

[0109] (vegetable oil) The emulsion composition of the present embodiment may contain one or more types of vegetable oils. The term "vegetable oil" refers to an oil or fat whose main component is triglyceride obtained from a plant and which is liquid at 25° C. For example, the vegetable oil may have a melting point of 20° C. or lower.

[0110] The vegetable oil may be any known vegetable oil that can be incorporated into cosmetics, such as almond oil, rapeseed oil, avocado oil, camellia seed oil, linseed oil, argania spinosa kernel oil, apricot kernel oil, perilla oil, olive oil, orange seed oil, rosa canina fruit oil, canola oil, apricot kernel oil, kukui nut oil, passionflower seed oil, crambe abyssinica seed oil, cranberry seed oil, walnut seed oil, black currant seed oil, corn oil, sesame oil, wheat germ oil, rice bran oil, rice germ oil, camellia sasanqua oil, safflower oil, pomegranate seed oil, shea butter oil, perilla seed oil, watermelon seed oil, Sclerocarya birrea seed oil, soybean oil, Examples of oils that may be used include: tea seed oil, evening primrose oil, camellia oil, tomato seed oil, carrot seed oil, persic oil, palm oil, hybrid safflower oil, Job's tears oil, baobab seed oil, babassu oil, peanut oil, pistachio seed oil, castor oil, sunflower seed oil, helianthus annuus (sunflower) oil, grape seed oil, Plukenetia volubilis seed oil, broccoli seed oil, hazelnut oil, macadamia nut oil, mango seed oil, meadowfoam oil, cottonseed oil, peach kernel oil, vegetable oil, coconut oil, camellia sinensis (tea tree) oil, European rubus seed oil, borage seed oil, rosehip oil, and moringa seed oil (the ingredient names exemplified here are all the ingredient names listed on the cosmetic product label).

[0111] The vegetable oil blended in the emulsion composition of this embodiment may be, for example, any of drying oil, semi-drying oil, and non-drying oil. The "drying oil" is a vegetable oil with an iodine value of 130 or more, "semi-drying oil" is a vegetable oil with an iodine value of more than 100 but less than 130, and "non-drying oil" is a vegetable oil with an iodine value of 100 or less. The iodine value of vegetable oil can be measured in accordance with the method of the Quasi-drug Ingredients Standards 2021.

[0112] As the vegetable oil to be blended in the emulsion composition of the present embodiment, from the viewpoint of improving the hair styling power when the emulsion composition is used to style hair with heat, a drying oil or a semi-drying oil is preferred, and a drying oil is more preferred.

[0113] Examples of the drying oil include soybean oil, grape seed oil, borage seed oil, sunflower seed oil, safflower oil, cranberry seed oil, flaxseed oil, pomegranate seed oil, kukui nut oil, black currant seed oil, rose canina fruit oil, linseed oil, European rubus seed oil, evening primrose oil, and Plukenetia volubilis seed oil. Examples of semi-drying oils include rice bran oil, orange seed oil, carrot seed oil, canola oil, apricot kernel oil, peach kernel oil, almond oil, crambe abyssinica seed oil, sesame oil, rice germ oil, watermelon seed oil, tomato seed oil, passionflower seed oil, wheat germ oil, and corn oil. Non-drying oils include pistachio seed oil, baobab seed oil, argania spinosa kernel oil, sclerocarya birrea seed oil, and avocado oil.

[0114] (liquid ester oil) The emulsion composition of the present embodiment may contain one or more liquid ester oils. The liquid ester oil is a liquid ester oil that exhibits fluidity when tilted after being left to stand at 25° C. For example, a liquid ester oil having a melting point of less than 25° C. can be used as the liquid ester oil.

[0115] Examples of liquid ester oils include liquid esters of linear or branched fatty acids and monovalent linear or branched alcohols, liquid esters of linear or branched fatty acids and polyhydric alcohols, liquid esters of liquid monovalent linear or branched alcohols and monovalent or polycarboxylic acids, and liquid esters of ester compounds of linear or branched fatty acids having a hydroxyl group and linear or branched fatty acids with monovalent linear or branched alcohols.

[0116] Examples of the liquid ester of a linear or branched fatty acid and a monovalent linear or branched alcohol include a liquid ester of a linear fatty acid and a monovalent linear alcohol, a liquid ester of a linear fatty acid and a monovalent branched alcohol, a liquid ester of a branched fatty acid and a monovalent linear alcohol, and a liquid ester of a branched fatty acid and a monovalent branched alcohol. Examples of the liquid esters of straight-chain fatty acids and monovalent straight-chain alcohols include cetyl caprylate, hexyl laurate, ethyl oleate, decyl oleate, oleyl oleate, and decyl myristate. Examples of the liquid esters of straight-chain fatty acids and monohydric branched alcohols include isopropyl myristate, isopropyl palmitate, isopropyl linoleate, isostearyl laurate, isotridecyl myristate, 2-hexyldecyl myristate, isostearyl myristate, 2-octyldodecyl myristate, 2-ethylhexyl palmitate, 2-hexyldecyl palmitate, isostearyl palmitate, 2-ethylhexyl stearate, 2-hexyldecyl stearate, isodecyl oleate, 2-octyldodecyl oleate, and 2-octyldodecyl ricinoleate. Examples of the liquid ester of a branched fatty acid and a monovalent linear alcohol include ethyl isostearate, cetyl 2-ethylhexanoate, cetostearyl 2-ethylhexanoate, stearyl 2-ethylhexanoate, and hexyl isostearate. Examples of the liquid ester of a branched fatty acid and a monohydric branched alcohol include isopropyl isostearate, isopropyl isostearate, 2-octyldodecyl neopentanoate, 2-hexyldecyl 2-ethylhexanoate, isostearyl 2-ethylhexanoate, 2-ethylhexyl isononanoate, isononyl isononanoate, 2-hexyldecyl dimethyloctanoate, 2-octyldodecyl dimethyloctanoate, 2-ethylhexyl isopalmitate, 2-hexyldecyl isostearate, isostearyl isostearate, and 2-octyldodecyl isostearate.

[0117] Examples of the liquid esters of linear or branched fatty acids and polyhydric alcohols include glycerin fatty acid esters (glyceryl tricaprylate, glyceryl tri-2-ethylhexanoate, glyceryl tri(caprylic / capric acid), glyceryl triisopalmitate, glyceryl triisostearate, etc.), propylene glycol fatty acid esters (PG dilaurate, PG diisostearate, etc.), and pentaerythritol esters (pentaerythritol tetra-2-ethylhexanoate, pentaerythritol tetraisostearate, dipentaerythrityl tri-polyhydroxystearate, etc.).

[0118] Examples of the liquid esters of monovalent linear or branched alcohols and monovalent or polyvalent carboxylic acids include lactate esters (lauryl lactate, isostearyl lactate, 2-octyldodecyl lactate, etc.), carbonate esters (dicaprylyl carbonate, diethylhexyl carbonate, etc.), citrate esters (tri-2-ethylhexyl citrate, triisocetyl citrate, tri-2-octyldodecyl citrate, etc.), malate esters (distearyl malate, etc.), succinate esters, Examples of suitable esters include esters (di-2-ethylhexyl succinate, diethoxyethyl succinate, etc.), adipates (diisopropyl adipate, diisobutyl adipate, di-2-ethylhexyl adipate, etc.), sebacates (diethyl sebacate, diisopropyl sebacate, di-2-ethylhexyl sebacate, dibutyloctyl sebacate, etc.), and benzoates (alkyl benzoates (C12-15), isostearyl benzoate, etc.).

[0119] Examples of the liquid ester of an ester compound of a linear or branched fatty acid having a hydroxyl group and a linear or branched fatty acid with a monovalent linear or branched alcohol include isocetyl 12-stearoylhydroxystearate, stearyl 12-stearoylhydroxystearate, and isostearyl 12-stearoylhydroxystearate.

[0120] (liquid wax) The emulsion composition of the present embodiment may contain one or more liquid waxes. The liquid wax is a liquid wax that exhibits fluidity when tilted after being left to stand at 25° C. For example, a liquid wax having a melting point of 20° C. or less can be used as the liquid wax.

[0121] As the liquid wax, any known liquid wax that can be blended into cosmetics can be used, and examples thereof include jojoba oil and orange roughy oil (the names of the ingredients exemplified are all the names of ingredients displayed in cosmetics).

[0122] The amount of component (C) blended in the emulsion composition of this embodiment is not particularly limited and may be set appropriately.

[0123] The blending amount of component (C) in the emulsion composition of the present embodiment is, for example, 1% by mass or more, but from the viewpoint of improving the moisturized feel of the hair when touched with the hands after treatment on the hair, 3% by mass or more is preferred, and 5% by mass or more is more preferred.

[0124] The blending amount of component (C) in the emulsion composition of the present embodiment is, for example, 30% by mass or less, but from the viewpoint of improving the smoothness when running your hands through the hair after treatment, it is preferably 25% by mass or less, and more preferably 20% by mass or less.

[0125] The blending amount of component (C) in the emulsion composition of this embodiment ranges, for example, from 1% by mass to 30% by mass, but from the viewpoints described above, the blending amount of component (C) is preferably from 3% by mass to 25% by mass, and more preferably from 5% by mass to 20% by mass.

[0126] [Mass ratio: (B) component / (C) component] The mass ratio of the amount of component (B) to the amount of component (C) in the emulsion composition of this embodiment (amount of component (B) / amount of component (C)) may be set appropriately, and is, for example, 1 or more and 10 or less.

[0127] [Total amount: (B) component + (C) component] The total blend amount of the (B) component and the (C) component in the emulsion composition of this embodiment may be, for example, 50% by mass or more and 95% by mass or less, 70% by mass or more and 95% by mass or less, or 80% by mass or more and 95% by mass or less.

[0128] [Mass ratio: (B) component + (C) component / (A) component] The mass ratio of the total amount of the blended amount of the blended amount of the (B) component and the blended amount of the (C) component to the blended amount of the (A) component in the emulsion composition of this embodiment ({blend amount of the (B) component + blend amount of the (C) component} / blend amount of the (A) component) may be set appropriately, and is, for example, 2 or more and 300 or less.

[0129] [(D) component] The emulsion composition of this embodiment contains water as component (D), and the amount of water is 25 mass % or less. In the emulsion composition of this embodiment, water serves as a dispersion medium for components (A), (B), and (C).

[0130] The blending amount of component (D) in the emulsion composition of this embodiment is 25% by mass or less, but from the viewpoint of further improving emulsion stability, it is preferably 20% by mass or less, more preferably 15% by mass or less, and even more preferably 10% by mass or less.

[0131] The lower limit of the amount of component (D) in the emulsion composition of the present embodiment is, for example, 0.01% by mass or more. However, from the viewpoint of improving the softness of the hair when touched with the hands after treatment, the amount is preferably 0.1% by mass or more, more preferably 1% by mass or more, and even more preferably 3% by mass or more.

[0132] The blending amount of component (D) in the emulsion composition of this embodiment ranges, for example, from 0.01% by mass to 25% by mass. From the viewpoints described above, the blending amount of component (D) is preferably from 0.1% by mass to 20% by mass, more preferably from 1% by mass to 15% by mass, and even more preferably from 3% by mass to 10% by mass.

[0133] (optional ingredient) The emulsion composition of this embodiment may contain components other than the above-described components (A), (B), (C), and (D) (hereinafter sometimes referred to as "optional components"). The type and amount of the optional components can be appropriately determined depending on the formulation of the emulsion composition of this embodiment. Examples of optional components include surfactants (excluding component (A)), higher alcohols, lower alcohols, polyhydric alcohols (hereinafter sometimes referred to as component (E)), sugars, oily components (excluding components (B) and (C)), synthetic polymer compounds, semi-synthetic polymer compounds, natural polymer compounds, proteins, animal and plant extracts, microbial-derived substances, inorganic compounds, fragrances, preservatives, UV absorbers, acids, alkalis, and pigments.

[0134] [(E) component] The emulsion composition of the present embodiment may contain one or more polyhydric alcohols as component (E). When a polyhydric alcohol is added to the emulsion composition of the present embodiment, the viscosity of the emulsion composition can be increased.

[0135] As the component (E), for example, a polyhydric alcohol having 2 to 24 carbon atoms can be used.

[0136] As the component (E), for example, a polyhydric alcohol having a valence of from 2 to 6 can be used.

[0137] In the emulsion composition of this embodiment, from the viewpoint of increasing the viscosity of the emulsion composition, it is more preferable to use a dihydric polyhydric alcohol as component (E). Furthermore, as the dihydric polyhydric alcohol, dipropylene glycol, 1,3-butylene glycol, or propylene glycol is preferable, dipropylene glycol or 1,3-butylene glycol is more preferable, and dipropylene glycol is even more preferable.

[0138] Examples of component (E) include ethylene glycol, propylene glycol (1,2-propanediol), 1,3-propanediol, glycerin, 1,3-butylene glycol, diethylene glycol, pentylene glycol, isopentyldiol, diglycerin, dipropylene glycol, hexanediol, octanediol, tripropylene glycol, polyglycerin-3, polyethylene glycol 300, polyethylene glycol 400, and polyethylene glycol 600.

[0139] When the emulsion composition of the present embodiment contains the component (E), the amount of the component (E) contained is, for example, from 0.01% by mass to 10% by mass.

[0140] (solid oil) The emulsion composition of the present embodiment may contain a solid oil. Here, the term "solid oil" refers to an oil that does not flow and maintains a fixed shape (including paste, flake, or powder) when left standing at 25°C, such as an oil with a melting point of 30°C or higher.

[0141] From the viewpoint of improving emulsion stability, the emulsion composition of this embodiment preferably contains no more than 5% by mass of solid oil, or does not contain any solid oil.

[0142] When a solid oil is blended into the emulsion composition of this embodiment, the blending amount of the solid oil is not particularly limited, but is, for example, 0.001 to 5% by mass. Furthermore, when a solid oil is blended into the emulsion composition of this embodiment, the blending amount of the solid oil is preferably 1% by mass or less, more preferably 0.5% by mass or less, and even more preferably 0.1% by mass or less, from the viewpoint of improving emulsion stability.

[0143] The solid oil may be selected from hydrocarbons, fatty acids, higher alcohols, waxes, esters, and silicones that are solid at 25°C.

[0144] Examples of hydrocarbons that are solid at 25°C include paraffin, petrolatum, and microcrystalline wax. Examples of higher alcohols that are solid at 25°C include myristyl alcohol, cetanol, oleyl alcohol, stearyl alcohol, and behenyl alcohol. Examples of fatty acids that are solid at 25°C include palmitic acid, stearic acid, and behenic acid. Examples of waxes that are solid at 25°C include candelilla wax, carnauba wax, rice bran wax, and sunflower seed wax. An example of an ester that is solid at 25°C is cetyl palmitate. Examples of silicones that are solid at 25°C include alkyl-modified silicones.

[0145] (emulsified form) When the emulsion composition of the present embodiment is used on hair, from the viewpoint of improving the compatibility with hair upon application, it is preferable that the outermost phase of the emulsion composition is phase D (a surfactant phase containing component (A) and component (D)) or an aqueous phase.

[0146] The emulsion composition of this embodiment may be an O / D emulsion composition or an O / W emulsion composition. In the emulsion composition of this embodiment, the O / D emulsion composition is one in which a D phase (surfactant phase) containing a surfactant including component (A), component (D), and component (E) is the outermost phase, and an oil phase, which is a dispersed phase, is dispersed as fine oil droplets within the D phase. When an O / D emulsion composition is added to water, the D phase dissolves in the water, releasing oil droplets from the outer phase, forming an O / W emulsion.

[0147] (viscosity) The viscosity of the emulsion composition of this embodiment is not particularly limited and can be set appropriately. The viscoelasticity value, which is an index of viscosity of the emulsion composition of this embodiment, is, for example, a G' value of 100 mPa·s or more and 5000 mPa·s or less at a stress of 2.4 Pa, measured using a rheometer (for example, a stress-controlled rheometer "HAAKE MARS" (trade name) manufactured by HAAKE) under the following conditions: measurement temperature: 25°C, cone-plate sensor diameter: 35 mm, cone-plate sensor inclination angle: 2°, measurement mode: stress-dependent dynamic viscoelasticity measurement, waiting time: 1 minute, stress: 0.1 Pa to 1000 Pa, and frequency: 1 Hz.

[0148] (pH) The pH of the emulsion composition of the present embodiment at 25° C. is not particularly limited and may be set appropriately, but is, for example, 3 or more and 9 or less.

[0149] [Application] The emulsion composition of the present embodiment may be, for example, an emulsion cosmetic. The emulsion cosmetic may be used on hair, scalp, or skin other than the scalp.

[0150] (emulsion cosmetics for hair) The emulsion composition of the present embodiment can be used, for example, as an emulsion cosmetic for hair. Examples of emulsion cosmetics for hair include emulsion cosmetics for hair care (for example, hair treatments, hair treatments that can also be used for styling, one component of a multi-component hair treatment, hair treatments for pre-treatment before perming, hair treatments for post-treatment after perming, hair treatments for pre-treatment before hair coloring, hair treatments for post-treatment after hair coloring, hair treatments for pre-treatment before bleaching, and hair treatments for post-treatment after bleaching), emulsion cosmetics for hair styling (for example, hair styling agents), emulsion cosmetics for hair coloring (for example, temporary hair dyes, semi-permanent hair dyes, permanent hair dyes (non-oxidative hair dyes, oxidative hair dyes, etc.), bleaches, bleaching agents), emulsion cosmetics for permanent waves, emulsion cosmetics for straight perms (for example, hair straighteners, straighteners, relaxers, etc.), and emulsion cosmetics for hair care or hair growth (for example, hair tonics, hair growth agents, etc.). The hair treatment may be a leave-in hair treatment or a wash-off hair treatment.

[0151] From the viewpoint of providing hair with a moisturized feel when touched with a hand and maintaining smoothness when running one's hands through the hair, the emulsion composition of the present embodiment is preferably used as an emulsion cosmetic for hair that is not rinsed off after application to the hair. Examples of emulsion cosmetic for hair that is not rinsed off after application to the hair include leave-in hair treatments and hair styling agents.

[0152] When the emulsion composition of the present embodiment contains a drying oil or semi-drying oil as component (C), it is preferably used as a hair styling agent for styling hair by heat treatment, because when the emulsion composition of the present embodiment contains a drying oil or semi-drying oil as component (C), the hair styling power when setting hair by heat is enhanced.

[0153] The heat treatment of hair is carried out, for example, by using a tool equipped with a heating element, bringing the heating element into contact with the hair, and styling the hair into a desired shape. Examples of tools equipped with a heating element include hair irons such as curling irons equipped with a cylindrical heating element and straightening irons equipped with a pair of opposing heating elements. The temperature setting of the heating element in the hair iron can be set as appropriate, but is, for example, 100°C or higher and 220°C or lower. Examples of curling irons equipped with a cylindrical heating element include the "DIGITAL Perming Iron" manufactured by Hakko Co., Ltd., the "Ibil DH Ceramic Iron" manufactured by Tricho Industries, Inc., the "Create Curl Pro SR" manufactured by Create, and the "ReFaRE-AG00A" manufactured by MTG. Examples of straightening irons equipped with a pair of opposing heating elements include the "ADST Premium DS" manufactured by Hakko Co., Ltd., the "KHS-8740" manufactured by Koizen Seiki Co., Ltd., and the "Straight Pro SR" manufactured by Create.

[0154] As a method for heat treating hair using a curling hair iron equipped with the cylindrical heating element, for example, the hair is wrapped around the cylindrical heating element of the curling hair iron, clamped with a clip body facing the heating element, and heated for a predetermined period of time.

[0155] Furthermore, examples of methods for heat treating hair using a straightening iron equipped with a pair of opposing heating elements include a process in which the hair is clamped between the opposing heating elements of the straightening iron and then slid along the length of the hair toward the ends of the hair while the hair is held in place while being straightened with a tool such as a hand, a comb or a brush, and a method that combines both of these.

[0156] (emulsified cosmetics for scalp) The emulsion composition of the present embodiment can be used, for example, as an emulsion cosmetic for the scalp. Examples of emulsion cosmetics for the scalp include scalp treatments (for example, leave-in scalp treatments, rinse-off scalp treatments, and one component of multi-ingredient scalp treatments).

[0157] (Emulsified cosmetics for skin other than the scalp) The emulsion composition of the present embodiment can be used, for example, as an emulsion cosmetic for skin other than the scalp. Examples of emulsion cosmetics for skin other than the scalp include lotions, creams, packs, and masks.

[0158] The emulsion composition of the present embodiment may, for example, serve as both an emulsion cosmetic for hair and an emulsion cosmetic for the scalp, or may serve as both an emulsion cosmetic for the scalp and an emulsion cosmetic for skin other than the scalp, or may serve as both an emulsion cosmetic for hair, an emulsion cosmetic for the scalp, and an emulsion cosmetic for skin other than the scalp.

[0159] (Dosage form) The dosage form of the emulsion composition of this embodiment may be selected appropriately, and examples thereof include emulsion, cream, wax, paste, solid, foam, and mist.

[0160] (Product form) The product form of the emulsion composition of the present embodiment may be, for example, a product form that can be commonly used as a cosmetic or quasi-drug.

[0161] Furthermore, the emulsion composition of the present embodiment may be formulated, for example, with a drying oil or semi-drying oil blended as component (C), and when used as a hair styling agent, it may be in the form of an emulsion cosmetic product, with the explanatory materials such as packaging, pamphlets, and instructions indicating that it is for styling hair by heat treatment.

[0162] [Manufacturing method] The emulsion composition of this embodiment can be produced using a known method for producing cosmetics or quasi-drugs, for example, by heating and mixing component (A) and component (D), and then further mixing component (B) and component (C).

[0163] [How to use] The method of using the emulsion composition of this embodiment can be the same as that of known emulsion compositions, depending on the dosage form of the emulsion composition of this embodiment.

[0164] When the emulsion composition of the present embodiment is used as an emulsion cosmetic to be applied to at least one of hair, scalp, and skin other than the scalp, a known method for treating cosmetics for hair, scalp, and skin other than the scalp may be employed.

[0165] <Processing method> The treatment method of this embodiment is a method of treating at least one of hair, scalp, and skin other than the scalp using the emulsion composition of this embodiment described above.

[0166] The treatment method of this embodiment may be the same as the method of using the emulsion composition of this embodiment, and may be used to treat at least one of hair, scalp, and skin other than the scalp. [Example]

[0167] The present invention will be described in detail below based on examples, but the present invention should not be construed as being limited by the descriptions in these examples.

[0168] (Production of emulsion compositions of Examples 1 to 29, Comparative Examples 1 to 5, and Reference Examples A and B) The emulsion compositions of Examples 1 to 29, Comparative Examples 1 to 5, and Reference Examples A and B were produced by conventional emulsification procedures using any of the components used in the production described below to obtain the compositions shown in Tables 1 to 12. In the following component (A) and other components, EO stands for ethylene oxide, and the number immediately before EO indicates the average mole of ethylene oxide added. Furthermore, the highly polymerized dimethicone and highly polymerized dimethiconol used in the following component (B) both had an average degree of polymerization of 650 or more.

[0169] The emulsion compositions of Examples 1 to 29 and Reference Examples A to B were O / D type emulsion compositions or O / W type emulsion compositions immediately after production. Note that the numerical values ​​in the component columns in Tables 1 to 12 are % by mass, and the notation "-" indicates that the component is not blended.

[0170] (Ingredients used in producing emulsion composition) Component (A) Polyoxyethylene cetyl ether (40 E.O.), polyoxyethylene cetyl ether (10 E.O.), polyoxyethylene behenyl ether (20 E.O.), polyoxyethylene oleyl ether (20 E.O.), polyoxyethylene lauryl ether (9 E.O.), polyoxyethylene phytosterol (30 E.O.), polyoxyethylene polyoxypropylene cetyl ether (20 E.O.) (4 P.O.), polyoxyethylene hydrogenated castor oil (40 E.O.), coconut oil fatty acid N-methylethanolamide, polyoxyethylene sorbitan tetraoleate (30 E.O.), polyoxyethylene glyceryl triisostearate (20 E.O.), polyoxyethylene (10) lauryl ether sodium acetate, polyoxyethylene lauryl ether sodium sulfate, sodium tetradecene sulfonate, sodium lauroylmethyl-β-alanine, stearyl trimethylammonium chloride, behenyl trimethylammonium chloride ·(B) Component Highly polymerized dimethicone and dimethicone (10mm 2 / s) mixture, highly polymerized dimethicone, highly polymerized dimethiconol and dimethicone (2mm 2 / s) mixture, dimethicone (1.5mm 2 / s), dimethicone (5mm 2 / s), dimethicone (20mm 2 / s) ·(C) component Evening primrose oil, grape seed oil, sunflower seed oil, macadamia nut oil, pentaerythritol tetra 2-ethylhexanoate, jojoba oil ·(D) Component purified water ·(E) Component Dipropylene glycol, 1,3-butylene glycol, propylene glycol, glycerin Other ingredients Polyoxyethylene alkyl (12-14) ether (12E.O.), polyoxyethylene stearyl ether (2E.O.), sodium coconut oil fatty acid methyl taurate, distearyl dimethyl ammonium chloride, squalane, phenoxyethanol, isopropanol, fragrance

[0171] (Evaluation method) The emulsion compositions prepared above were evaluated as follows. After producing the emulsion compositions of Examples 1 to 29, Comparative Examples 1 to 5, and Reference Examples A to B, 80 g of each emulsion composition was placed in a sealed glass tube (diameter: 40 mm, height: 120 mm) when it had reached near room temperature.

[0172] (Evaluation 1: Appearance 3 hours after production) The emulsion compositions of Examples 1 to 29, Comparative Examples 1 to 5, and Reference Examples A and B were placed in sealed glass tubes and allowed to stand at room temperature for 3 hours. The appearance of each emulsion composition 3 hours after production was then visually observed and evaluated according to the following criteria. During the evaluation, the appearance of each emulsion composition placed in the sealed glass tube was also photographed.

[0173] (Evaluation criteria for rating 1) ◯: The emulsion composition is not separated (the emulsion composition has a uniform appearance and no two-phase separation, oil separation (including floating oil), or water separation is observed). ×: The emulsion composition is separated (the entire emulsion composition is separated into two phases, or oil separation (including floating oil) or water separation is observed in part of the emulsion composition, resulting in a non-uniform appearance).

[0174] The emulsion compositions of Examples 1 to 29 that were rated as ○ in the above Evaluation 1 (the emulsion composition did not separate 3 hours after production) were subjected to a storage stability test in which the emulsion compositions were stored at room temperature and at 50°C.

[0175] (Evaluation 2: Appearance after storage at room temperature (15 days)) The emulsion compositions of Examples 1 to 29 and Reference Examples A to B contained in sealed glass tubes were stored at room temperature for 15 days, with the date of production being Day 0. On Days 1, 2, 4, 5, 6, 10, 11, 14, and 15 after storage at room temperature, the appearance of each emulsion composition was visually observed and evaluated according to the following evaluation criteria. In addition, during the evaluation on Day 15 after storage at room temperature, the appearance of each emulsion composition contained in a sealed glass tube was photographed.

[0176] (Evaluation criteria for rating 2) ◯: The emulsion composition is not separated (the emulsion composition has a uniform appearance and no two-phase separation, oil separation (including floating oil), or water separation is observed). ×: The emulsion composition is separated (the entire emulsion composition is separated into two phases, or oil separation (including floating oil) or water separation is observed in part of the emulsion composition, resulting in a non-uniform appearance).

[0177] In Evaluation 2, for emulsion compositions in which clear two-phase separation was observed at the surface or bottom of the sealed glass tube, the percentage of separation was calculated on the observation day when separation was first observed. The percentage of separation was calculated according to the formula shown below after measuring the "separated portion at the surface or bottom of the emulsion composition (height of the separated portion)" and the "height of the emulsion composition in the sealed glass tube (height of the emulsion composition)" on the observation day when separation was first observed. Note that for the emulsion composition of Example 15, no clear two-phase separation was observed, so the percentage of separation was not calculated. "Separation ratio (%)" = ("height of separation part (mm)" / "height of emulsion composition (mm)")

[0178] Regarding the rate of separation, if the observation date on which separation was first confirmed was the same, a larger value indicates poorer storage stability than a smaller value.

[0179] (Evaluation 3: Appearance after storage at 50°C (15 days)) The emulsion compositions of Examples 1 to 29 and Reference Examples A to B contained in sealed glass tubes were stored in an incubator at 50°C for 15 days, with the date of production being Day 0. The appearance of each emulsion composition was visually observed on Day 1, Day 2, Day 4, Day 5, Day 6, Day 10, Day 11, Day 14, and Day 15 after storage at 50°C, and each emulsion composition was evaluated according to the following evaluation criteria. Furthermore, during evaluation on Day 15 after storage at 50°C, the appearance of each emulsion composition contained in a sealed glass tube was photographed.

[0180] (Evaluation criteria for rating 3) ◯: The emulsion composition is not separated (the emulsion composition has a uniform appearance and no two-phase separation, oil separation (including floating oil), or water separation is observed). ×: The emulsion composition is separated (the entire emulsion composition is separated into two phases, or oil separation (including floating oil) or water separation is observed in part of the emulsion composition, resulting in a non-uniform appearance).

[0181] For those in which separation was confirmed in Evaluation 3, the percentage of separation on the observation day when separation was first confirmed was calculated using the same method as in Evaluation 2. Note that for the emulsion composition of Example 14, no clear two-phase separation was confirmed, so the percentage of separation was not calculated (indicated as (-) in Table 6).

[0182] (Evaluation results) The following Tables 1 to 12 show the results of Evaluations 1 to 3 for the emulsion compositions of Examples 1 to 29, Comparative Examples 1 to 5, and Reference Examples A to B. Table 9 shows the results of Evaluations 1 to 3 and the viscoelasticity values, and Table 11 shows the results of Evaluations 1 to 3 and the curl rate evaluation results after 24 hours (methods for evaluating viscoelasticity values ​​and curl rate after 24 hours will be described later). Note that since Evaluations 2 and 3 were not performed for Comparative Examples 1 to 5, the evaluation columns for Evaluations 2 and 3 are shaded.

[0183] (Evaluation results of Reference Examples A and B, and Comparative Example 1) Table 1 shows the evaluation results for the emulsion compositions of Reference Examples A and B and Comparative Example 1. Figure 1 also shows photographs of the appearance of the emulsion compositions of Reference Examples A and B and Comparative Example 1 when evaluations 1 to 3 were performed.

[0184] [Table 1]

[0185] From the results shown in Table 1 and FIG. 1, the emulsion composition of Reference Example A (not containing component (C)) showed no separation in appearance 3 hours after production in Evaluation 1, and a stable emulsion composition was obtained. Furthermore, the emulsion composition of Reference Example B (the emulsion composition of Reference Example A in which the silicone (component (B)) liquid at 25°C was partially replaced with squalane (comparison C): not containing component (C)) showed no separation in appearance 3 hours after production in Evaluation 1, similar to the emulsion composition of Reference Example A, and a stable emulsion composition was obtained. However, the emulsion composition of Comparative Example 1 (the emulsion composition of Reference Example A in which the silicone (component (B)) liquid at 25°C was partially replaced with evening primrose oil (component (C)): containing components (B) and (C)) showed clear separation in appearance 3 hours after production in Evaluation 1, and a stable emulsion composition was not obtained. Therefore, from these results, it is clear that the compatibility between component (B) and component (C) in the emulsion composition is poor, and a stable emulsion composition cannot be obtained.

[0186] (Evaluation results of Example 1 and Comparative Example 1) Table 2 shows the evaluation results for the emulsion compositions of Example 1 and Comparative Example 1. Also, Fig. 1 shows photographs of the appearance of the emulsion compositions of Example 1 and Comparative Example 1 when evaluations 1 to 3 were performed.

[0187] [Table 2]

[0188] From the results shown in Table 2 and Figure 1, the emulsion composition of Example 1, which contained (A1) among the (A) components, showed no separation in appearance 3 hours after production in Evaluation 1, and a stable emulsion composition was obtained. However, the emulsion composition of Comparative Example 1, which did not contain component (A) (the emulsion composition of Example 1 in which (A1) was replaced with comparative component A), showed clear separation in appearance 3 hours after production in Evaluation 1, and a stable emulsion composition was not obtained. Therefore, from these results, it can be seen that the emulsion composition of this embodiment can provide a stable emulsion composition by using (A1), even when the emulsion composition contains the poorly compatible components (B) and (C).

[0189] (Evaluation results of Examples 2 to 12 and Comparative Example 2) Tables 3 to 5 show the evaluation results for the emulsion compositions of Examples 2 to 12 and Comparative Example 2. Also, Figures 2 to 4 show photographs of the appearance of the emulsion compositions of Examples 2 to 12 and Comparative Example 2 when evaluations 1 to 3 were performed.

[0190] [Table 3]

[0191] [Table 4]

[0192] [Table 5]

[0193] From the results shown in Tables 3 to 5 and Figures 2 to 4, the emulsion compositions of Examples 2 to 12, which contained any of (A1) to (A9) among the (A) components, showed no apparent separation in appearance 3 hours after production in Evaluation 1, and stable emulsion compositions were obtained. However, the emulsion composition of Comparative Example 2, which did not contain the (A) component (comparative component A was blended in place of the (A) component), showed clear separation in appearance 3 hours after production in Evaluation 1, and no stable emulsion composition was obtained. Therefore, from these results, it can be seen that the emulsion composition of this embodiment can provide a stable emulsion composition by using any of (A1) to (A9), even when the emulsion composition contains the (B) component and the (C) component, which are poorly compatible.

[0194] (Evaluation results of Examples 13 to 16 and Comparative Examples 2 and 3) Table 6 shows the evaluation results for the emulsion compositions of Examples 13 to 16 and Comparative Examples 2 and 3. Fig. 5 shows photographs of the appearance of the emulsion compositions of Examples 13 to 16 and Comparative Example 3 when evaluations 1 to 3 were performed, and Fig. 2 shows a photograph of the appearance of the emulsion composition of Comparative Example 2 when evaluations 1 to 3 were performed.

[0195] [Table 6]

[0196] From the results shown in Table 6 and FIGS. 5 and 2, the emulsion compositions of Examples 13 to 16, which contained any of (A10) to (A13) of the (A) component, showed no visible separation in appearance 3 hours after production in Evaluation 1, and stable emulsion compositions were obtained. However, the emulsion compositions of Comparative Examples 2 and 3, which did not contain the (A) component (comparative component A was blended in place of the (A) component), showed clear separation in appearance 3 hours after production in Evaluation 1, and stable emulsion compositions were not obtained. Therefore, from these results, it can be seen that the emulsion composition of this embodiment can provide a stable emulsion composition by using any of (A10) to (A13), even when the emulsion composition contains the (B) component and the (C) component, which are poorly compatible.

[0197] (Evaluation results of Examples 17 to 18 and Comparative Examples 2 and 4) Table 7 shows the evaluation results for the emulsion compositions of Examples 17 to 18 and Comparative Examples 2 and 4. Fig. 6 shows photographs of the appearance of the emulsion compositions of Examples 17 to 18 and Comparative Example 2 when evaluations 1 to 3 were performed, and Fig. 2 shows photographs of the appearance of the emulsion composition of Comparative Example 2 when evaluations 1 to 3 were performed.

[0198] [Table 7]

[0199] From the results shown in Table 7 and FIGS. 6 and 2, the emulsion compositions of Examples 17 and 18, which contained (A14) of the (A) component, showed no apparent separation in appearance 3 hours after production in Evaluation 1, and stable emulsion compositions were obtained. However, the emulsion compositions of Comparative Examples 2 and 4, which did not contain component (A) (comparative component A was blended in place of component (A)), showed clear separation in appearance 3 hours after production in Evaluation 1, and stable emulsion compositions were not obtained. Therefore, from these results, it can be seen that the emulsion composition of this embodiment can be obtained as a stable emulsion composition by using (A14), even when the emulsion composition contains the poorly compatible components (B) and (C).

[0200] (Results of Evaluation 2 for the emulsion compositions of Examples 2 to 18) From the evaluation results shown in Tables 3 to 7, the emulsion compositions of Examples 2 to 10, 13, 14, 17, and 18 (containing any of (A1) to (A7), (A10), (A11), and (A14) as component (A)) did not show any separation in the appearance evaluation after storage at room temperature (15 days) in Evaluation 2. However, in the appearance evaluation after storage at room temperature (15 days) in Evaluation 2, the emulsion compositions of Examples 11, 12, and 15 (containing any of (A8), (A9), and (A12) as component (A)) showed separation on the 15th day after storage at room temperature. The emulsion composition of Example 16 (containing (A13)) showed separation on the 11th day after storage at room temperature. For the emulsion compositions of Examples 11, 12, and 15, the rate of separation (%) in Evaluation 2 was in the order of the emulsion composition of Example 11 (containing (A8)), followed by the emulsion composition of Example 12 (containing (A9)) (the rate of separation was not calculated for the emulsion composition of Example 15 (containing (A12)), as no clear two-phase separation was observed).

[0201] Therefore, from the results of Evaluation 2 for the emulsion compositions of Examples 2 to 18, it can be seen that, from the viewpoint of excellent storage stability when stored at room temperature, of the (A) components, those selected from (A1) to (A12) and (A14) are preferred, those selected from (A1) to (A8), (A10), (A11) and (A14) are more preferred, and those selected from (A1) to (A7), (A10), (A11) and (A14) are even more preferred.

[0202] (Results of Evaluation 3 for the emulsion compositions of Examples 2 to 18) From the evaluation results shown in Tables 3 to 7, the emulsion compositions of Examples 2, 4, 5, 7 to 10 (containing either (A1) polyoxyethylene cetyl ether (40 E.O.), polyoxyethylene behenyl ether (20 E.O.), (A2), or (A4) to (A7) as component (A)) showed no separation in the appearance evaluation after storage at 50°C (15 days) in Evaluation 3. However, in the appearance evaluation after storage at room temperature (15 days) in Evaluation 3, separation was observed in the emulsion composition of Example 3 (containing (A1) polyoxyethylene cetyl ether (10 E.O.) as component (A)) on the 15th day after storage at 50°C. Separation was observed in the emulsion composition of Example 13 (containing (A10) as component (A)) on the 14th day after storage at room temperature. The emulsion compositions of Examples 6 and 14 (containing (A3) or (A11) as component (A)) showed separation on the 10th day after storage at 50°C. The emulsion composition of Example 18 (containing (A14) behenyltrimethylammonium chloride as component (A)) showed separation on the 2nd day after storage at room temperature. The emulsion compositions of Examples 11, 12, 15, 16, and 17 (containing (A8), (A9), (A12), (A13), and (A14) stearyltrimethylammonium chloride as component (A)) showed separation on the 1st day after storage at room temperature.

[0203] Therefore, based on the results of Evaluations 2 and 3 for the emulsion compositions of Examples 2 to 18, from the viewpoint of excellent storage stability when stored at room temperature and when stored at 50°C, of ​​the component (A), those selected from behenyltrimethylammonium chloride (A1) to (A7), (A10), (A11), and (A14) are preferred, those selected from (A1), (A2), (A4) to (A7), and (A10) are more preferred, those selected from (A1), (A2), and (A4) to (A7) are even more preferred, and those selected from polyoxyethylene cetyl ether (40 E.O.) of (A1), polyoxyethylene behenyl ether (20 E.O.), (A2), and (A4) to (A7) are particularly preferred.

[0204] (Evaluation results of Examples 2, 19, and Comparative Example 5) Table 8 shows the evaluation results for the emulsion compositions of Examples 2 and 19 and Comparative Example 5. Also, Fig. 7 shows photographs of the appearance of the emulsion compositions of Examples 2 and 19 and Comparative Example 5 when evaluations 1 to 3 were performed.

[0205] [Table 8]

[0206] 7, the emulsion compositions of Examples 2 and 19, in which the component (D) was blended in an amount of 10% by mass or 25% by mass, showed no separation in appearance 3 hours after production in Evaluation 1, and stable emulsion compositions were obtained. However, the emulsion composition of Comparative Example 5, in which the component (D) was blended in an amount of 50% by mass, showed clear separation in appearance 3 hours after production in Evaluation 1, and no stable emulsion composition was obtained. Therefore, these results show that, among emulsion compositions of the present embodiment in which the components (A) to (D) are blended, stable emulsion compositions can be obtained as long as the component (D) is blended in an amount of 25% by mass or less.

[0207] (Evaluation Results of Examples 1, 2, 20 to 22) Table 9 shows the evaluation results for the emulsion compositions of Examples 1, 2, and 20 to 22. Also, Fig. 8 shows photographs of the appearance of the emulsion compositions of Examples 1, 2, and 20 to 22 when evaluations 1 to 3 were performed.

[0208] The viscoelasticity (mPa s) values ​​for the emulsion compositions of each example in Table 9 indicate the measured values ​​of G' at a stress of 2.4 Pa using a rheometer (HAAKE MARS (trade name) stress-controlled rheometer manufactured by HAAKE) under the following conditions: measurement temperature: 25°C, cone-plate sensor diameter: 35 mm, cone-plate sensor inclination angle: 2°, measurement mode: stress-dependent dynamic viscoelasticity measurement, waiting time: 1 minute, stress: 0.1 Pa to 1000 Pa, and frequency: 1 Hz.

[0209] [Table 9]

[0210] From the results shown in Table 9 and FIG. 8, the emulsion compositions of Examples 1, 2, and 20 to 22 (with or without component (E)) showed no separation in appearance 3 hours after production in Evaluation 1, and stable emulsion compositions were obtained. Furthermore, the emulsion compositions of Examples 1, 2, and 20 to 22 showed no separation in appearance evaluation after storage at room temperature (15 days) in Evaluation 2, and after storage at 50°C (15 days) in Evaluation 3. Therefore, from these results, it can be seen that the emulsion composition of this embodiment, regardless of whether component (E) is added or not, provides a stable emulsion composition without separation and has excellent storage stability when stored at room temperature and at 50°C.

[0211] The results shown in Table 9 show that the emulsion compositions of Examples 1, 2, and 20-21, which contain component (E), have higher viscoelasticity values ​​and higher viscosity than the emulsion composition of Example 22, which does not contain component (E). Differences in viscoelasticity values ​​were observed among the emulsion compositions of Examples 1, 2, and 20-21. This is due to differences in the type of component (E), but from the perspective of further increasing the viscoelasticity of the emulsion composition, it can be seen that the most effective (E) components are dipropylene glycol, 1,3-butylene glycol, propylene glycol, and glycerin, in that order.

[0212] (Evaluation results of Examples 2, 23, and 24) Table 10 shows the evaluation results for the emulsion compositions of Examples 2, 23, and 24. Also, Fig. 9 shows photographs of the appearance of the emulsion compositions of Examples 2, 23, and 24 when evaluations 1 to 3 were performed.

[0213] [Table 10]

[0214] 9, the emulsion compositions of Examples 2, 23, and 24, which used different types of component (B), showed no separation in appearance 3 hours after production in Evaluation 1, and were stable emulsion compositions. Furthermore, the emulsion compositions of Examples 2, 23, and 24 showed no separation in appearance evaluation after storage at room temperature (15 days) in Evaluation 2, and after storage at 50°C (15 days) in Evaluation 3. Therefore, these results show that the emulsion compositions of this embodiment, even when using different types of component (B), are stable emulsion compositions without separation and have excellent storage stability when stored at room temperature and at 50°C.

[0215] (Evaluation results of Examples 2, 25 to 27) Table 11 shows the evaluation results for the emulsion compositions of Examples 2 and 25 to 27. Fig. 10 shows photographs of the appearance of the emulsion compositions of Examples 25 to 27 when evaluations 1 to 3 were performed, and Fig. 2 shows photographs of the appearance of the emulsion composition of Example 1 when evaluations 1 to 3 were performed.

[0216] The curl ratio (%) after 24 hours for the emulsion compositions of Examples 2 and 25 to 27 in Table 11 was evaluated by the following evaluation method.

[0217] Using a hair bundle (hair colored hair) for evaluation, 18 cm in length and 0.8 g in weight, 0.02 g of the emulsion composition of Examples 2, 25 to 27 was applied, and the hair bundle was wrapped around a curling iron (manufactured by Creats, product name: Curl Pro SR-26) set at 180°C and heat-treated for 10 seconds. After the heat treatment, the hair bundle for evaluation was left at room temperature of 25°C and humidity of 50% in a state where only the root portion was fixed and hung, and the length of the hair bundle (L 24 ) was measured, and the curl ratio (C) was calculated according to the following formula. C=(18-L 24 ) / 18

[0218] [Table 11]

[0219] From the results shown in Table 11 and Figs. 10 and 2, the emulsion compositions of Examples 2 and 25 to 27, which used different types of component (C), showed no separation in appearance 3 hours after production in Evaluation 1, and stable emulsion compositions were obtained. Furthermore, the emulsion compositions of Examples 2 and 25 to 27 showed no separation in appearance evaluation after storage at room temperature (15 days) in Evaluation 2, and after storage at 50°C (15 days) in Evaluation 3. Therefore, from these results, it can be seen that the emulsion compositions of this embodiment, even when using different types of component (C), provide stable emulsion compositions without separation and have excellent storage stability when stored at room temperature and at 50°C.

[0220] From the results shown in Table 11, the emulsion compositions of Examples 2, 25 and 26 (containing either evening primrose oil, grape seed oil, or sunflower seed oil (drying or semi-drying oil) as the vegetable oil in the (C) component) had a higher curl rate (%) after 24 hours than the emulsion composition of Example 27 (containing macadamia nut oil (non-drying oil) as the vegetable oil in the (C) component). Also, the emulsion compositions of Examples 2 and 25 (containing either evening primrose oil or grape seed oil (drying oil) as the vegetable oil in the (C) component) had a higher curl rate (%) after 24 hours than the emulsion composition of Example 27 (containing sunflower seed oil (semi-drying oil) as the vegetable oil in the (C) component). Therefore, when the emulsion composition of this embodiment contains a vegetable oil as component (C), it is clear that drying oil, semi-drying oil, and non-drying oil are superior in this order from the viewpoint of further improving hair curl formation.

[0221] (Evaluation results of Examples 2, 28, and 29) Table 12 and FIG. 10 show the evaluation results for the emulsion compositions of Examples 2, 28, and 29.

[0222] [Table 12]

[0223] From the results shown in Table 12 and Figs. 10 and 2, the emulsion compositions of Examples 2, 28, and 29, which used different types of component (C), showed no separation in appearance 3 hours after production in Evaluation 1, and stable emulsion compositions were obtained. Furthermore, the emulsion compositions of Examples 2, 28, and 29 showed no separation in appearance evaluation after storage at room temperature (15 days) in Evaluation 2, and after storage at 50°C (15 days) in Evaluation 3. Therefore, from these results, it can be seen that the emulsion composition of this embodiment, even when the component (C) is different, provides a stable emulsion composition without separation and has excellent storage stability when stored at room temperature and at 50°C.

Claims

1. (A) one or more selected from the following (A1) to (A14): (A1) a polyoxyethylene alkyl ether having an alkyl group having 16 or more carbon atoms and an average number of moles of oxyethylene added of 10 or more; (A2) polyoxyethylene alkylene ether, (A3) polyoxyethylene lauryl ether, (A4) polyoxyethylene phytosterol ether, (A5) polyoxyethylene polyoxypropylene alkyl ether, (A6) polyoxyethylene hydrogenated castor oil, (A7) fatty acid N-methylethanolamide, (A8) tetra-fatty acid polyoxyethylene sorbitan, (A9) tri-fatty acid polyoxyethylene glyceryl, (A10) polyoxyethylene alkyl ether carboxylic acid or a salt thereof, (A11) polyoxyethylene alkyl ether sulfate or a salt thereof, (A12) N-acylmethylalanine or a salt thereof, (A13) α-olefin sulfonic acid or a salt thereof, (A14) mono-long chain alkyl trimethyl ammonium salt, (B) a silicone that is liquid at 25°C; (C) one or more selected from vegetable oils, liquid ester oils, and liquid waxes; and (D) water; is blended, The emulsion composition, wherein the blending amount of (D) water is 25 mass % or less.

2. 2. The emulsion composition according to claim 1, wherein (A) is one or more selected from (A1) to (A12) and (A14).

3. The (A) is one or more selected from the (A1), (A2), and (A4) to (A7), The emulsion composition according to claim 2, wherein (A1) is a polyoxyethylene alkyl ether having an alkyl group having 16 or more carbon atoms and an average number of moles of oxyethylene added of 15 or more.

4. 3. The emulsion composition according to claim 1, wherein the blending amount of the silicone (B) that is liquid at 25°C is 40% by mass or more.

5. The emulsion composition according to claim 1 or 2, further comprising (E) a polyhydric alcohol.

6. The emulsion composition according to claim 1 or 2, wherein the component (C) is a vegetable oil.

7. 6. The emulsion composition according to claim 5, wherein the vegetable oil is one or more selected from the group consisting of drying oils and semi-drying oils.

8. The emulsion composition according to claim 1 or 2, which is an O / D type emulsion composition or an O / W type emulsion composition.

9. The emulsion composition according to claim 1 or 2, which is an emulsion cosmetic.

10. A method for treating at least one of hair, scalp, and skin other than the scalp, using the emulsion composition according to claim 1 or 2.

11. 10. The method of claim 9, which is a hair styling method.

Images