Hair cosmetic and hair treatment method

Abstract

To provide a hair cosmetic that is effective in adding volume to the hair and offers excellent finger-combing feel, and a hair treatment method using the hair cosmetic.SOLUTION: A hair cosmetic of the present invention comprises (A) a nonionic polymer, (B) an ionic polymer, (C) a salt, and (D) an ester oil having an IOB value of 0.15 or more. It is preferable that the hair cosmetic further contains (E) ethanol. A hair treatment method of the present invention employs the hair cosmetic of the present invention.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a hair cosmetic composition and a hair treatment method which impart volume to hair and make it easy to run your fingers through. [Background technology]

[0002] Hair cosmetics that can impart various functions to hair have been proposed. In some cases, the imparting of volume to hair is emphasized as a function that hair cosmetics can impart to hair. Due to changes in hair condition caused by aging or the environment, hair volume can decrease due to weaker rising from the roots, and many consumers are troubled by this.

[0003] In order to solve these problems, cosmetics that have the function of increasing the volume of keratin fibers such as hair have been developed (Patent Document 1, etc.). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2020-70248 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, in cosmetics having the function of increasing hair volume as disclosed in Patent Document 1, polymers that form a film on the surface of the hair and powders are often used as ingredients that impart this function. However, when cosmetics using these ingredients are applied to hair, the hair tends to clump after application, making it difficult to run fingers through the hair.

[0006] Furthermore, in addition to the cosmetic composition of Patent Document 1, there is a demand for proposals of new cosmetic compositions that can impart volume to hair.

[0007] The present invention has been made in consideration of the above circumstances, and aims to provide a hair cosmetic composition that imparts volume to hair and provides excellent finger-running properties, and a hair treatment method using said hair cosmetic composition. [Means for solving the problem]

[0008] The hair cosmetic composition of the present invention contains (A) a nonionic polymer, (B) an ionic polymer, (C) a salt, and (D) an ester oil having an IOB value of 0.15 or more.

[0009] The hair treatment method of the present invention is a hair treatment method using the hair cosmetic composition of the present invention. Effect of the Invention

[0010] According to the hair cosmetic composition of the present invention, it is possible to provide a hair cosmetic composition which imparts volume to hair and has excellent finger-compressibility.

[0011] Furthermore, according to the hair treatment method of the present invention, a hair treatment method using the hair cosmetic composition of the present invention can be provided. [Brief description of the drawings]

[0012] [Figure 1] 1 is a photograph for explaining a method for measuring the degree of hair deflection in evaluating hair firmness in an embodiment. [Diagram 2] 1 is a photograph of a haircutting mannequin after half of the head was treated with the hair cosmetic composition of Example 1 and half with the hair cosmetic composition of Comparative Example 1 in an evaluation of hair volume. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, the present invention will be described based on an embodiment of the present invention (hereinafter, referred to as the present embodiment).

[0014] <Hair cosmetics> The hair cosmetic composition of the present embodiment contains (A) a nonionic polymer, (B) an ionic polymer, (C) a salt, and (D) an ester oil having an IOB value of 0.15 or more.

[0015] Nonionic polymers and ionic polymers have the ability to form a film on the hair surface, and when they are incorporated into hair cosmetics, they function as an effective ingredient for maintaining a hairstyle, for example. On the other hand, as described above, when these polymers are used to form a bundle of multiple hairs, the rising of the hair from the roots is impaired, and the volume of the hair is reduced due to the weight of the bundled hair. In addition, when a bundle of multiple hairs is formed using the above polymers, the problem of the hair being difficult to pass through when the hair bundle is passed through may occur.

[0016] The hair cosmetic composition of this embodiment is excellent in imparting volume to hair and making it easy to run your fingers through, by combining (A) a nonionic polymer and (B) an ionic polymer, and further combining (C) a salt and (D) an ester oil with an IOB value of 0.15 or more. Therefore, the hair cosmetic composition of this embodiment can improve the problems caused by the use of the above-mentioned polymers. In addition, the hair cosmetic composition of this embodiment is less sticky when applied to the hands, and is excellent in imparting elasticity to hair after application.

[0017] (A) Nonionic polymer The hair cosmetic composition of the present embodiment contains one or more types of nonionic polymers (sometimes referred to as component (A)).

[0018] Examples of component (A) include cellulose, guar gum, dextrin, methyl cellulose, ethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxypropyl methyl cellulose, hydroxypropyl ethyl cellulose, polyethylene glycol, highly polymerized polyethylene glycol (polyethylene glycol having an average degree of polymerization of ethylene oxide of 2000 or more), and polyvinylpyrrolidone. Only one of these may be used, or two or more may be used in combination.

[0019] For example, the component (A) is measured in a 0.5% by mass aqueous solution using a stress-controlled rheometer (e.g., "Rheo Stress 6000" manufactured by HAAKE) at a measurement temperature of 25°C, a cone-plate sensor diameter of 35 mm and an inclination angle of 2°, in a steady flow curve mode, with a waiting time of 1 minute and a shear rate of 36 s -1 The component (A) blended in the hair cosmetic composition of the present embodiment may be a commercially available product.

[0020] Of the (A) components, polyvinylpyrrolidone and hydroxyethyl cellulose are preferred from the viewpoint of providing better volume to hair, and highly polymerized polyethylene glycol is preferred from the viewpoint of reducing stickiness. Therefore, from the above viewpoints, the hair cosmetic composition of the present embodiment preferably contains one or more selected from polyvinylpyrrolidone, hydroxyethyl cellulose, and highly polymerized polyethylene glycol as the (A) component.

[0021] The blending amount of the (A) component in the hair cosmetic of this embodiment is preferably 0.01% by mass or more, more preferably 0.03% by mass or more, from the viewpoint of excellent hair resilience. If the amount of the (A) component in the hair cosmetic is too large, the weight of the hair after the application of the hair cosmetic may increase, and the volume of the hair may be reduced. Therefore, from the viewpoint of excellent hair volume, the blending amount of the (A) component in the hair cosmetic of this embodiment is preferably 5.0% by mass or less, more preferably 3.0% by mass or less.

[0022] (B) Ionic polymer The hair cosmetic of the present embodiment contains one or more ionic polymers (sometimes referred to as component (B)). Examples of the component (B) include an ionic polymer containing a cationic group (sometimes referred to as component (B1) below) and an anionic polymer (sometimes referred to as component (B2) below). The polymer containing a cationic group is an ionic polymer having a structural unit derived from a cationic monomer having a cationic group (such as a quaternary ammonium structure or a tertiary amine structure) or a structural unit derived from an amphoteric monomer having a cationic group and an anionic group. The component (B) contained in the hair cosmetic of the present embodiment may be one or more selected from the components (B1) and (B2).

[0023] Examples of the ionic polymer containing a cationic group of component (B1) include cationic cellulose (O-[2-hydroxy-3-(trimethylammonio)propyl] hydroxyethyl cellulose chloride, polyquaternium-4, etc.), cationic guar gum (O-[2-hydroxy-3-(trimethylammonio)propyl] guar gum chloride, etc.), vinylpyrrolidone·N,N-dimethylaminoethyl methacrylic acid copolymer diethyl sulfate, polydimethylmethylene piperidinium chloride, and ionic polymers containing diallyl quaternary ammonium salt as a constituent unit (dimethyldiallylammonium chloride·acrylamide copolymer, acrylamide·acrylic acid·dimethyldiallylammonium chloride). Copolymer, dimethyldiallylammonium chloride-acrylic acid copolymer (Polyquaternium-22), acrylamide-acrylic acid-dimethyldiallylammonium chloride copolymer (Polyquaternium-39), etc.), 2-methacryloyloxyethyl phosphorylcholine-2-hydroxy-3-methacryloyloxypropyltrimethylammonium chloride copolymer (Polyquaternium-64), Polyquaternium-47, Polyquaternium-52, Polyquaternium-53, acrylic acid-acrylamide-methacrylamidopropyltrimonium chloride, cationic starch, cationic polypeptide, etc., may be used alone or in combination of two or more of these. Note that the above-mentioned examples of Polyquaternium-4, Polyquaternium-22, Polyquaternium-39, Polyquaternium-64, Polyquaternium-47, Polyquaternium-52, and Polyquaternium-53 are cosmetic display names.

[0024] Examples of the anionic polymer of component (B2) include acrylic acid-acrylamide-ethyl acrylate copolymer, acrylic acid alkyl ester-methacrylic acid alkyl ester-diacetoneacrylamide-methacrylic acid copolymer, acrylic acid-alkyl methacrylate copolymer, acrylic resin alkanolamine, carboxyvinyl polymer, xanthan gum, and sodium hyaluronate. Only one of these may be used, or two or more may be used in combination.

[0025] For example, a 0.5% by mass aqueous solution of component (B) is used, and the measurement is performed using a stress-controlled rheometer (e.g., "Rheo Stress 6000" manufactured by HAAKE) at a measurement temperature of 25°C, a cone-plate sensor diameter of 35 mm and an inclination angle of 2°, in steady flow curve mode, with a waiting time of 1 minute and a shear rate of 36 s -1 The component (B) blended in the hair cosmetic composition of the present embodiment may be a commercially available product.

[0026] Of the (B) components, from the viewpoint of providing better volume to hair, 2-methacryloyloxyethyl phosphorylcholine·2-hydroxy-3-methacryloyloxypropyl trimethylammonium chloride copolymer, xanthan gum, hyaluronic acid or a salt thereof are preferred, and from the viewpoint of reducing stickiness, O-[2-hydroxy-3-(trimethylammonio)propyl]hydroxyethylcellulose chloride is preferred. Therefore, from the above viewpoint, the hair cosmetic of this embodiment is preferably one in which one or more selected from 2-methacryloyloxyethyl phosphorylcholine·2-hydroxy-3-methacryloyloxypropyl trimethylammonium chloride copolymer, xanthan gum, hyaluronic acid or a salt thereof, and O-[2-hydroxy-3-(trimethylammonio)propyl]hydroxyethylcellulose chloride are blended as the (B) component.

[0027] The blending amount of the (B) component in the hair cosmetic of this embodiment is preferably 0.01% by mass or more, more preferably 0.03% by mass or more, from the viewpoint of excellent hair resilience after application. Also, if the amount of the (B) component in the hair cosmetic is too large, the weight of the hair after application of the hair cosmetic may increase, and the volume of the hair may be reduced. Therefore, from the viewpoint of excellent hair volume, the blending amount of the (B) component in the hair cosmetic of this embodiment is preferably 5.0% by mass or less, more preferably 3.0% by mass or less.

[0028] (C) Salt The hair cosmetic composition of the present embodiment contains one or more salts (sometimes referred to as component (C)). Examples of the salt include salts of organic acids and salts of inorganic acids. The salts of the organic acids may be, for example, salts of organic acids having 10 or less carbon atoms (or 6 or less carbon atoms), and the salts of the inorganic acids may be, for example, salts of inorganic acids having a molecular weight of 500 or less.

[0029] The salt of the organic acid may be a light metal salt of an organic acid. The salt of the inorganic acid may be a light metal salt of an inorganic acid. The light metal salt is a salt of a metal having a specific gravity of 4 or less, and examples of the light metal salt include alkali metal salts (sodium salt, potassium salt, etc.), alkaline earth metal salts (magnesium salt, calcium salt, etc.), and aluminum salts. Among the light metal salts, sodium salts are preferred from the viewpoint of providing better volume to hair.

[0030] The hair cosmetic composition of the present embodiment may contain, as component (C), one or more selected from light metal salts of organic acids and light metal salts of inorganic acids. The light metal salts of inorganic acids may have a molecular weight of 500 or less. The light metal salts of organic acids may have a molecular weight of less than 350.

[0031] Examples of the salts of inorganic acids include sodium chloride, potassium chloride, magnesium chloride, magnesium sulfate, sodium phosphate, disodium hydrogen phosphate, sodium dihydrogen phosphate, aluminum sulfate, and potassium aluminum sulfate.

[0032] Examples of the salts of organic acids include sodium citrate, disodium citrate, trisodium citrate, sodium malate, potassium malate, aluminum lactate, sodium lactate, potassium lactate, sodium edetate, and sodium benzoate.

[0033] As the component (C) incorporated in the hair cosmetic composition of the present embodiment, from the viewpoints of imparting volume to hair and excellent finger-combability, sodium chloride and sodium citrate are preferred, and sodium chloride is more preferred.

[0034] The blending amount of the (C) component in the hair cosmetic of this embodiment is, for example, 0.1% by mass or more, but from the viewpoint of improving the smoothness of running fingers through hair, it is preferably 0.3% by mass or more, and more preferably 1.0% by mass or more. Also, from the viewpoint of improving the smoothness of running fingers through hair, the blending amount of the (C) component in the hair cosmetic of this embodiment is preferably 10.0% by mass or less, and more preferably 5.0% by mass or less.

[0035] (D) Ester oil with an IOB value of 0.15 or more The hair cosmetic composition of the present embodiment contains one or more ester oils (sometimes referred to as component (D)) having an IOB value of 0.15 or more. By combining an ester oil satisfying the above IOB value with the above components (A), (B) and (C) in the hair cosmetic composition, it is possible to impart excellent volume to hair.

[0036] Here, the "IOB (Inorganic Organic Balance) value" is widely known as an index of polarity of organic compounds, and is based on the organic conceptual diagram proposed by Atsushi Fujita, and is expressed as the ratio of inorganic value (IV) to organic value (OV), i.e., "IOB value = IV / OV". The higher the IOB value, the higher the polarity. The OV of component (D) is the value of the number of carbon atoms in component (D) x 20. The IV of component (D) is the sum of the IVs of each substituent contained in the ester oil. For the IV, for example, the values ​​described in Organic Conceptual Diagram - Basics and Applications - (1984) by Yoshio Koda: Sankyo Publishing; can be referred to.

[0037] Examples of component (D) include isotridecyl isononanoate (IOB value: 0.15), isopropyl isostearate (IOB value: 0.15), ethyl isostearate (IOB value: 0.15), isopropyl palmitate (IOB value: 0.16), pentaerythritol tetraisostearate (IOB value: 0.16), trimethylolpropane triisostearate (IOB value: 0.16), di-2-hexyldecyl adipate (IOB value: 0.16), ethyl oleate (IOB value: 0.16), glyceryl triisostearate (IOB value: 0.16), and the like. .16), Glyceryl Trioleate (IOB Value: 0.16), Hexyl Laurate (IOB Value: 0.17), Isopropyl Myristate (IOB Value: 0.18), Isodecyl Isononanoate (IOB Value: 0.18), 2-Ethylhexyl Isononanoate (IOB Value: 0.18), Alkyl Benzoate (C12-C15) (IOB Value: 0.18), Isodecyl Pivalate (IOB Value: 0.18), 2-Ethylhexyl Pelargonate (IOB Value: 0.18), Alkyl Benzoate (C12-15) (IOB Value: 0.18), Isononyl Isononanoate (IOB Value: 0.20), isodecyl pivalate (IOB value: 0.22), octyldodecyl ricinoleate (IOB value: 0.22), di-2-ethylhexyl sebacate (IOB value: 0.24), neopentyl glycol dicaprate (IOB value: 0.25), triisocetyl citrate (IOB value: 0.27), diisostearyl malate (IOB value: 0.28), 2-ethylhexyl paramethoxycinnamate (IOB value: 0.28), di-2-ethylhexyl adipate (IOB value: 0.29), tri(caprylic / capric acid)glyceryl (IOB value: 0.3), la Diisostearyl lauroyl glutamate (IOB value: 0.31), bis(hexyldecyl / octyldodecyl) lauroyl glutamate (IOB value: 0.31), propylene glycol dicaprylate (IOB value: 0.32), di-2-ethylhexyl succinate (IOB value: 0.32), di-2-ethylhexyl maleate (IOB value: 0.32), trimethylolpropane tri-2-ethylhexanoate (IOB value: 0.33), glyceryl tricaprylate (IOB value: 0.33), di-2-hexyldecyl N-lauroyl-L-glutamate (IOB value: 0.33), pentaerythritol tetra 2-ethylhexanoate (IOB value: 0.35), glyceryl tri 2-ethylhexanoate (IOB value: 0.35), 2-hexyldecyl myristoyl methylaminopropionate (IOB value: 0.39), diisopropyl sebacate (IOB value: 0.4), dibutyl adipate (IOB value: 0.43), diethyl sebacate (IOB value: 0.43), adipic acid Examples of suitable esters include diisobutyl acetate (IOB value: 0.46), tri-2-ethylhexyl citrate (IOB value: 0.5), diisopropyl adipate (IOB value: 0.55), 2-ethylhexyl salicylate (IOB value: 0.6), diethoxyethyl succinate (IOB value: 1.13), and triethyl citrate (IOB value: 1.22). Only one of these may be used, or two or more may be used in combination.

[0038] The IOB value of the component (D) is preferably 0.16 or more from the viewpoint of providing better volume to hair. The upper limit of the IOB value of the ester oil is not particularly limited, but may be, for example, 0.75 or less, 0.5 or less, 0.3 or less, or 0.25 or less.

[0039] As the component (D) incorporated in the hair cosmetic composition of this embodiment, from the viewpoint of being excellent in imparting volume and firmness to hair, alkyl benzoate (C12-C15) and glyceryl triisostearate are preferred.

[0040] The blending amount of component (D) in the hair cosmetic composition of this embodiment is preferably 0.02% by mass or more, more preferably 0.05% by mass or more, from the viewpoint of improving the smoothness of hair runnability. Also, the blending amount of component (D) in the hair cosmetic composition of this embodiment is preferably 3.0% by mass or less, more preferably 1.0% by mass or less, from the viewpoint of improving the volume of hair.

[0041] (E) Ethanol From the viewpoint of reducing stickiness, it is preferable that the hair cosmetic composition of the present embodiment further contains ethanol (sometimes referred to as component (E)).

[0042] The blending amount of component (E) in the hair cosmetic composition of this embodiment is preferably 15% by mass or more from the viewpoint of reducing stickiness, and the blending amount of component (E) in the hair cosmetic composition of this embodiment is preferably 30% by mass or less from the viewpoint of reducing the odor of ethanol.

[0043] solvent In the hair cosmetic composition of the present embodiment, water is usually used as a solvent. The blending amount of water in the hair cosmetic composition of the present embodiment is, for example, 30% by mass or more and 98% by mass or less.

[0044] Compatible ingredients In addition to the above-mentioned components, the hair cosmetic composition of the present embodiment may contain various components that are typically used in hair cosmetic compositions, such as surfactants, preservatives, polyhydric alcohols, anti-inflammatory agents, and pH adjusters.

[0045] Specific examples of the surfactant include nonionic surfactants such as polyoxyethylene alkyl ethers, polyoxyethylene polyoxypropylene alkyl ethers, polyoxyethylene fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene hydrogenated castor oil, polyoxyethylene sorbitol tetra fatty acid esters, glycerin fatty acid esters, alkyl glucosides, sorbitan fatty acid esters, polyglycerin fatty acid esters, polyoxyethylene glycerin fatty acid esters, and sucrose fatty acid esters. When a surfactant is blended in the hair cosmetic composition of the present embodiment, the blending amount is, for example, 0.01% by mass or more and 5.0% by mass or less.

[0046] Specific examples of preservatives include parahydroxybenzoic acid esters such as methyl parahydroxybenzoate, propyl parahydroxybenzoate, and butyl parahydroxybenzoate, and their salts (such as sodium salts); salicylic acid and its salts; sorbic acid and its salts; phenoxyethanol; methylchloroisothiazolinone and methylisothiazolinone.

[0047] Specific examples of polyhydric alcohols include polyethylene glycol, propylene glycol, dipropylene glycol, glycerin, ethylene glycol, diethylene glycol, butylene glycol, pentanediol, isoprene glycol, and hexanediol.

[0048] Specific examples of anti-inflammatory agents include glycyrrhizinic acid, glycyrrhetinic acid, carbenoxolone and their salts (sodium salt, potassium salt, ammonium salt, etc.); 3-succinyloxyglycyrrhetinic acid and its salts (sodium salt, potassium salt, ammonium salt, etc.); allantoin; guaiazulene; and various plant extracts having anti-inflammatory effects (chamomile extract, gentian extract, Scutellaria root extract, perilla extract, horse chestnut extract, etc.).

[0049] Specific examples of pH adjusters include acids such as citric acid, phosphoric acid, malic acid, tartaric acid, and lactic acid; and alkalis such as ammonia, sodium hydroxide, triethanolamine, and arginine.

[0050] The hair cosmetic composition of this embodiment preferably has a pH of 3.0 or more and 8.5 or less at 25° C., and when a pH adjuster is used, it is preferably used in an amount that adjusts the pH of the hair cosmetic composition to such a value.

[0051] Furthermore, the hair cosmetic composition of this embodiment may also contain ingredients other than those listed above, such as oils such as lanolin derivatives, hydrocarbons (such as liquid paraffin), higher fatty acids, higher alcohols, and silicone oils; thickeners; conditioning agents (conditioning agents other than the above-mentioned ingredients); antioxidants and chelating agents for preventing discoloration and oxidation; anti-dandruff agents; bactericides; ultraviolet absorbers; fragrances; and other water-soluble ingredients (such as vitamin derivatives such as pantothenyl alcohol).

[0052] others The hair cosmetic composition of the present embodiment is used, for example, in a form in which it is applied to the hair and then not washed off. The hair cosmetic composition of the present embodiment can be used, for example, as a leave-in treatment, a leave-in beauty serum, or a hair styling agent.

[0053] The formulation of the hair cosmetic of this embodiment is not particularly limited, and may be, for example, a liquid, cream, or gel. The hair cosmetic of this embodiment may be used by putting the hair cosmetic together with a propellant in a spray container and applying it to the hair as a spray, or by putting the hair cosmetic in a spray container without using a propellant and applying it to the hair as a mist. When the hair cosmetic of this embodiment is used as a spray or mist, the formulation of the hair cosmetic is preferably a liquid.

[0054] The viscosity of the hair cosmetic composition of this embodiment, when it is in a liquid formulation, is, for example, 500 mPa·s or less. The lower limit of the viscosity is, for example, 1 mPa·s or more. The viscosity of the hair cosmetic composition as referred to in this specification is the value measured 60 seconds later at 25°C and at an appropriate rotation speed (6 rpm, 12 rpm, etc.) using a B-type viscometer with a rotor selected according to the viscosity.

[0055] The hair cosmetic of this embodiment can be used in various ways depending on its purpose. Therefore, the hair cosmetic of this embodiment can be used on dry or wet hair. For example, when used on wet hair, it is recommended to apply it to wet hair and then dry the hair with a hair dryer or the like before use. When the hair cosmetic of this embodiment is used as a hair styling agent, it can be used, for example, as described above, by applying it as a spray or mist to dry hair or towel-dried hair after washing. In addition, in the case of a cream-type hair cosmetic, it can be used by taking an appropriate amount in the hand and applying it to dry hair or towel-dried hair after washing. The hair after applying the hair cosmetic can be dried with a hair dryer as necessary.

[0056] When the hair cosmetic composition of the present embodiment is used as a leave-in treatment or leave-in beauty serum, it can be applied to the scalp or roots of the hair.

[0057] When the hair cosmetic composition of the present embodiment is applied to the roots of the hair, it provides better lift at the roots and is more effective at imparting volume to the hair.

[0058] The hair cosmetic composition of the present embodiment can be produced by a known method for producing hair cosmetics depending on the formulation and other factors.

[0059] <Hair treatment method> The hair treatment method of the present embodiment uses the above-mentioned hair cosmetic composition of the present embodiment. The hair treatment method of the present embodiment can be used according to the above-mentioned method for using the hair cosmetic composition of the present embodiment. EXAMPLES

[0060] The present invention will be described in detail below based on examples. However, the following examples do not limit the present invention. In Tables 1 to 6 below, the blending amount of each component is shown in % so that the total amount of the hair cosmetic composition is 100%, but the % is always mass %, and the % is omitted in these tables, and only the numerical value indicating the blending amount is shown.

[0061] Examples 1 to 17 and Comparative Examples 1 to 9 Polyvinylpyrrolidone, hydroxyethyl cellulose, PEG-14M (highly polymerized polyethylene glycol), 2-methacryloyloxyethyl phosphorylcholine / 2-hydroxy-3-methacryloyloxypropyl trimethylammonium chloride copolymer, O-[2-hydroxy-3-(trimethylammonio)propyl]hydroxyethylcellulose chloride, acrylamide / acrylic acid / dimethyldiallylammonium chloride copolymer, xanthan gum, sodium hyaluronate, sodium chloride, magnesium sulfate, sodium citrate, magnesium chloride, alkyl benzoate (C12-C15), glyceryl triisostearate, pentaerythritol tetra-2-ethylhexanoate, ethylhexyl palmitate, octyldodecyl myristate, olive oil, mineral oil, absolute ethanol, polyoxyethylene hydrogenated castor oil (40E.O.), fragrance, and purified water were used to prepare the hair cosmetics of Examples 1 to 17 and Comparative Examples 1 to 9 by mixing them in a conventional manner to obtain the compositions shown in Tables 1 to 6. The obtained hair cosmetics were all liquids with a viscosity of 500 mPa·s or less. These hair cosmetics were placed in a non-aerosol spray container capable of spraying mist, and the following evaluations were carried out.

[0062] The components (A), (B1), and (B2) used in Examples 1 to 17 and Comparative Examples 1 to 9 were dissolved in 0.5% by mass aqueous solution using a stress-controlled rheometer, HAAKE's "Rheo Stress 6000," at a measurement temperature of 25°C, a cone-plate sensor diameter of 35 mm, an inclination angle of 2°, steady flow curve mode, a waiting time of 1 minute, and a shear rate of 36 s -1 The viscoelasticity measured under the above conditions was 2000 mPa s or less for the (A) component, and 1000 mPa s or less for the (B1) component and the (B2) component.

[0063] <Evaluation of hair volume> A mannequin for hair cutting was prepared with hair cut to a length of about 25 cm, and the hair was washed with Milbon's Grand Linkage Willow Luxe Shampoo, rinsed with water, and then towel-dried. Then, a mist (application amount: 2 mL) of the hair cosmetic of Comparative Example 1 as a reference was sprayed on the root part of the hair of half of the wig, and the sprayed hair cosmetic was stretched and applied to the entire hair of the half. Next, a mist (application amount: 2 mL) of any of the hair cosmetics of Examples 1 to 13 and Comparative Examples 2 to 9 was sprayed on the root part of the hair of the remaining half, and the sprayed hair cosmetic was stretched and applied to the entire hair of the half. The wig hair to which the mist of each hair cosmetic was applied was dried using a hair dryer, and the volume of the hair after drying was visually evaluated by five evaluators who routinely evaluate hair cosmetics.

[0064] The evaluation of hair volume was carried out according to the following procedure: First, each evaluator assigned a score according to the following criteria. (Evaluation criteria for hair volume) 5 points: The overall volume of the hair is much increased compared to when the hair cosmetic product of Comparative Example 1 was used (the overall volume of the hair is much increased compared to when the hair cosmetic product of Comparative Example 1 was used, and the hair stands up very well at the roots). 4 points: The overall hair volume is increased compared to when the hair cosmetic product of Comparative Example 1 was used (the overall hair volume is increased compared to when the hair cosmetic product of Comparative Example 1 was used, and the hair roots stand up better). 3 points: Overall hair volume is equivalent to that when the hair cosmetic product of Comparative Example 1 was used (the increase in overall hair volume and the lift at the roots of the hair are the same as when the hair cosmetic product of Comparative Example 1 was used). 2 points: The overall volume of the hair was not increased compared to when the hair cosmetic product of Comparative Example 1 was used (the overall volume of the hair was not increased compared to when the hair cosmetic product of Comparative Example 1 was used, and the hair roots were not as well lifted). 1 point: The overall volume of the hair is not increased at all compared to when the hair cosmetic product of Comparative Example 1 was used (the overall volume of the hair is not increased at all compared to when the hair cosmetic product of Comparative Example 1 was used, and the hair roots stand up much less well).

[0065] The sum of the scores given by each evaluator was then divided by 5 (total number of evaluators) to obtain an average score, which was then ranked according to the following criteria to evaluate the hair cosmetics of each Example and Comparative Example. The higher the average score (rank), the greater the overall volume of the hair cosmetic product, and the better it is at imparting volume to hair. (Average score ranking criteria) ◎: Average score is 4 points or higher. ○: Average score is between 3.2 and 4 points. Equivalent: Mean score is 2.8 or more but less than 3.2. △: Average score is between 2 and 2.8 points. ×: Average score is less than 2 points.

[0066] <Evaluation of hair smoothness> A number of black hair bundles (20 cm long human hair bundles, 5 g per bundle) were prepared from the same Japanese female, and one bundle was assigned to each of the five evaluators. Each evaluator sprayed a mist (application amount: about 0.5 mL) of the hair cosmetic composition of either the Example or Comparative Example onto the hair bundle while it was wet with water, ran a comb through it 10 times, and then dried it with a hair dryer. The combability of the hair in the dry state was then evaluated.

[0067] The evaluation of the ease of running fingers through the hair was carried out according to the following procedure. First, each evaluator assigned a score according to the following criteria. (Evaluation standard for hair smoothness) 5 points: Compared to when the hair cosmetic composition of Comparative Example 1 was used, the hair felt very smooth when running fingers through it from the roots to the ends. 4 points: Compared to when the hair cosmetic composition of Comparative Example 1 was used, the hair felt smooth when running fingers through it from the roots to the ends. 3 points: The ease of running fingers through the hair from the roots to the ends is equivalent to when the hair cosmetic product of Comparative Example 1 was used. 2 points: Compared to when the hair cosmetic composition of Comparative Example 1 was used, the hair was less smooth to run fingers through when running fingers through the hair from the roots to the ends. 1 point: Compared to when the hair cosmetic composition of Comparative Example 1 was used, the hair felt much smoother when running fingers through it from the roots to the ends.

[0068] The sum of the scores given by each evaluator was then divided by 5 (total number of evaluators) to obtain an average score, which was then ranked according to the same criteria as for evaluating hair volume to evaluate the hair cosmetics of each Example and Comparative Example.

[0069] <Evaluation of low stickiness> Each of the five evaluators applied a mist (0.5 mL) of the hair cosmetic composition of each of the Examples and Comparative Examples to their hands, and evaluated the stickiness of the hands after 30 seconds had passed.

[0070] The evaluation of stickiness was carried out according to the following procedure: First, each evaluator assigned a score according to the following criteria. (Evaluation criteria for stickiness) 5 points: Much less sticky than when the hair cosmetic composition of Comparative Example 1 was used. 4 points: Less stickiness than when the hair cosmetic composition of Comparative Example 1 was used. 3 points: Stickiness is equivalent to that when the hair cosmetic composition of Comparative Example 1 was used. 2 points: Stickier than when the hair cosmetic composition of Comparative Example 1 was used. 1 point: Very sticky compared to when the hair cosmetic composition of Comparative Example 1 was used.

[0071] The sum of the scores given by each evaluator was then divided by 5 (total number of evaluators) to obtain an average score, which was then ranked according to the same criteria as for evaluating hair volume to evaluate the hair cosmetics of each Example and Comparative Example.

[0072] <Evaluation of hair firmness> Black hair bundles (hair bundles of human hair about 17 cm long, 0.5 g per bundle; 12 cm from the tip to the root bound with a rubber band) collected from the same Japanese woman were washed with a 50% sodium laureth sulfate aqueous solution, rinsed with water, and towel-dried. After that, a mist containing one of the hair cosmetics of the Examples and Comparative Examples was sprayed onto the hair bundle in an amount of about 0.5 mL, and then dried with a hair dryer. Using the dried hair bundle, the degree of hair sagging was measured by the following method, and the stiffness of the hair was evaluated.

[0073] FIG. 1 shows a photograph for explaining a method for measuring the degree of hair deflection. As shown in FIG. 1, a hair bundle 10, which was applied with a mist of hair cosmetics and dried with a hair dryer, was placed on graph paper 11 and attached with tape 12. Then, the length L (cm) from the root 10a (above the part attached with tape 12) of the hair bundle 10 to the highest point 10b (the point with the longest vertical distance from the root 10a in the figure) was measured, and this was taken as the degree of hair deflection. In other words, the larger the value of the length L, the smaller the degree of hair deflection and the stronger the bounciness of the hair, indicating that it is excellent in imparting bounciness to the hair. The length from the root 10a of the hair bundle to the tip part (left side of FIG. 1) is 12 cm.

[0074] The above evaluation results are shown in Tables 1 to 6. In Tables 1 to 6, "(B1)" refers to the (B1) component, and "(B2)" refers to the (B2) component. Additionally, "40 E.O." in parentheses following "polyoxyethylene hydrogenated castor oil" in Tables 1 to 6 means that the average number of moles of ethylene oxide added is 40. Additionally, "total 100" in the purified water column in Tables 1 to 6 means that the total amount of each component other than purified water constituting the hair cosmetic product is added to the amount of purified water to make up 100%.

[0075] [Table 1]

[0076] [Table 2]

[0077] [Table 3]

[0078] [Table 4]

[0079] [Table 5]

[0080] [Table 6]

[0081] As shown in Table 1, the hair cosmetics of Examples 1 to 7, which were prepared by combining (A) a nonionic polymer, (B) the (B1) or (B2) component of an ionic polymer, (C) a salt, and (D) an ester oil having a specific IOB value, were superior in imparting volume to hair and in smoothness after treatment, compared to the hair cosmetics of Comparative Example 1, which did not contain the components (A) and (B). Note that FIG. 2 shows a photograph of a mannequin for cutting hair treated with the hair cosmetics of Example 1 and the hair cosmetics of Comparative Example 1, and this photograph also shows that the hair cosmetics of Example 1 are superior in imparting volume to hair, compared to the hair cosmetics of Comparative Example 1. Furthermore, the hair cosmetics of Examples 1 to 7 were less sticky and superior in imparting firmness to hair, compared to the hair cosmetics of Comparative Example 1. The hair cosmetic composition of Comparative Example 2 not containing component (B) and the hair cosmetic composition of Comparative Example 3 not containing component (A) were inferior in imparting volume to hair compared to the hair cosmetics of Examples 1 to 7. Furthermore, the hair cosmetic composition of Comparative Example 3 was inferior in the ease of running fingers through the hair after treatment compared to the hair cosmetics of Examples 1 to 7, and caused stickiness.

[0082] As shown in Table 2, the hair cosmetic composition of Example 1 was superior in adding volume to hair after treatment compared to the hair cosmetic composition of Example 8 (an example in which the blended amounts of (A) nonionic polymer and (B) ionic polymer were relatively high from Example 1).

[0083] As shown in Table 3, the hair cosmetics of Examples 9 to 11, which were prepared by replacing the sodium chloride [ingredient (C)] in the hair cosmetic of Example 1 with another salt, were superior in imparting volume to hair and in making it easier to run your fingers through after treatment, as was the case with the hair cosmetic of Example 1, compared to the hair cosmetic of Comparative Example 4 [containing no ingredient (C)]. Furthermore, the hair cosmetics of Examples 1 and 9 to 11 were less sticky and superior in imparting firmness to hair compared to the hair cosmetics of Comparative Examples 1 and 4. With regard to imparting firmness to hair, the hair cosmetic of Example 1, which used sodium chloride as ingredient (C), was the most superior among Examples 1 and 9 to 11.

[0084] As shown in Table 4, the hair cosmetics of Examples 12, 13, and 1, which were prepared with sodium chloride [ingredient (C)] amounts of 0.3 mass%, 1.5 mass%, and 3 mass%, respectively, were superior in imparting hair volume and ease of running fingers through hair compared to the hair cosmetics of Comparative Example 4, which did not contain sodium chloride, and the hair cosmetics of Comparative Example 1. Furthermore, the hair cosmetics of Examples 12, 13, and 1 were less sticky and superior in imparting firmness and elasticity to hair compared to the hair cosmetics of Comparative Examples 1 and 4.

[0085] As shown in Table 5, the hair cosmetics of Examples 14 and 15, in which the alkyl benzoate (C12-C15) [component (D)] in the hair cosmetic of Example 1 was replaced with another ester oil, were superior in imparting hair volume and smoothness to the hair compared to the hair cosmetic of Comparative Example 1, as was the hair cosmetic of Example 1. Furthermore, the hair cosmetics of Examples 1, 14, and 15 were less sticky and superior in imparting firmness to hair compared to the hair cosmetic of Comparative Example 1. The hair cosmetics of Examples 1 and 14, which used an ester oil with an IOB value of less than 0.35 as component (D), were superior in imparting hair volume and firmness to hair compared to the hair cosmetic of Example 15.

[0086] In contrast, the hair cosmetics of Comparative Examples 5 and 6, which used an ester oil with an IOB value of less than 0.15 instead of component (D), the hair cosmetics of Comparative Example 7, which used olive oil, a vegetable oil, and the hair cosmetics of Comparative Example 8, which used mineral oil, a hydrocarbon, were inferior in imparting volume to hair compared to the hair cosmetics of Examples 1, 14, and 15. In Table 5, the hair cosmetics of Example 15 and the hair cosmetics of Comparative Example 9 were both rated as ○ for imparting volume to hair, but this is because the evaluation was based on the hair cosmetics of Comparative Example 1. When the volume of hair treated with the hair cosmetics of Example 15 and the hair cosmetics of Comparative Example 9 was evaluated, the hair cosmetics of Example 15 was superior in imparting volume to hair compared to the hair cosmetics of Comparative Example 9. In addition, the hair cosmetics of Comparative Examples 7 and 8 were sticky compared to the hair cosmetics of Examples 1, 14, and 15.

[0087] As shown in Table 6, the hair cosmetics of Examples 12, 16, and 17, which have different combinations of components (A) and (B), were superior in imparting volume to hair and making it easier to run your fingers through, compared to the hair cosmetic of Comparative Example 1, which does not contain either component (A) or (B). Furthermore, they were less sticky and superior in imparting firmness and strength to hair.

[0088] The viscosity of each of the hair cosmetics of Examples 12, 16, and 17 shown in Table 6 was measured under the following conditions, and was 10 mPa·s for Example 12, 107 mPa·s for Example 16, and 270 mPa·s for Example 17. It can be seen that hair cosmetics having a viscosity in the range of more than 10 mPa·s and less than 270 mPa·s are excellent at imparting volume to hair. (Measurement conditions) 80 g of each of the hair cosmetics of Examples 12, 16, and 17 was filled into a 100 mL screw-cap bottle and allowed to stand at 25°C for at least 1 hour. The viscosity was then measured using a B-type viscometer with a No. 1 rotor for 1 minute at a rotation speed of 12 rpm or 30 rpm.

Claims

1. (A) a nonionic polymer, (B) an ionic polymer, (C) a salt, and (D) Ester oil having an IOB value of 0.15 or more A hair cosmetic containing

2. The hair cosmetic composition according to claim 1, further comprising (E) ethanol.

3. The hair cosmetic composition according to claim 1 or 2, wherein the blending amount of the salt (C) is 0.3% by mass or more.

4. 3. The hair cosmetic composition according to claim 1, which has a viscosity at 25° C. of 500 mPa·s or less.

5. 3. The hair cosmetic composition according to claim 1 or 2, which is applied to the roots of hair.

6. A hair treatment method using the hair cosmetic composition according to claim 1 or 2.

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