Multi-agent type hair cosmetic and hair treatment method

Abstract

To provide a multi-agent type hair cosmetic capable of imparting to hair a uniform touch feeling and thickness, and a hair treatment method using the multi-agent type hair cosmetic.SOLUTION: There is provided a multi-agent type hair cosmetic which contains a first agent obtained by blending a cationic surfactant, a higher alcohol and an amino-modified silicone and / or ester (a) and a cream-like second agent obtained by blending an amphoteric surfactant or a nonionic surfactant. The ester (A) is an ester which is solid at 25°C or has a viscosity at 25°C of 10000 mPa s or more. Further, there is provided a hair treatment method which has a step of applying the first agent to the hair using the multi-agent type hair cosmetic and further applying the second agent without washing off the first agent or applying the second agent to the hair and further applying the first agent without washing off the second agent.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to a multi-agent hair cosmetic that can impart a uniform touch and thickness to hair, and a hair treatment method using the multi-agent hair cosmetic.

Background Art

[0002] Conventionally, single-agent (one-agent type) hair cosmetics (such as hair treatments) have been widely used for the purpose of improving the feel of hair and the like. On the other hand, multi-agent hair cosmetics used by a method of combining a plurality of agents containing different active ingredients and the like and sequentially applying them to hair are also known. Multi-agent hair cosmetics are used in situations where various state improvements such as the softness of hair, combability, volume, and thickness are required. Generally, it is expected that the effect of improving such hair can be enhanced compared to single-agent hair cosmetics.

[0003] As a multi-agent hair cosmetic, for example, Patent Document 1 proposes a multi-agent hair treatment agent that combines a first agent containing an amino-modified silicone and a second agent containing an anionic surfactant, ethanol, or the like. Patent Document 1 discloses that, with the above multi-agent hair treatment agent, stickiness after treatment that may occur when applying an agent containing an amino-modified silicone to hair and the squeaking of hair during washing with water can be suppressed by the action of the second agent.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In order to improve the condition of hair, various oily components are used as components incorporated into hair cosmetics. Among the oily components, amino-modified silicone or highly viscous esters may be used to impart thickness to the hair (a texture as if each individual hair surface is coated with some substance).

[0006] However, in treatments containing amino-modified silicone or highly viscous esters, when applied to the hair, these components tend to cause uneven adhesion to the hair, and it is not easy to uniformly adhere these components over the entire hair. Therefore, hair cosmetics using these components had a problem in that the texture of the hair after application tended to be uneven.

[0007] Here, in the multi-agent hair treatment agent of Patent Document 1 described above, when a first agent containing amino-modified silicone is combined with a second agent containing an anionic surfactant, ethanol, etc., it is relatively possible to achieve a uniform texture in the hair after treatment. However, there was still room for further study regarding achieving a uniform texture in the hair after treatment in hair cosmetics containing amino-modified silicone or highly viscous esters. Also, in the multi-agent hair treatment agent of Patent Document 1, although amino-modified silicone is used, there were cases where the imparting of thickness to the hair could not be fully exhibited.

[0008] The present invention has been made in view of the above circumstances, and its object is to provide a multi-agent hair cosmetic capable of imparting a uniform texture and thickness to the hair, and a hair treatment method using the multi-agent hair cosmetic.

Means for Solving the Problems

[0009] The multi-agent hair cosmetic of the present invention is a first agent containing a cationic surfactant, a higher alcohol, and amino-modified silicone and / or ester (a), and a cream-like second agent containing an amphoteric surfactant or a nonionic surfactant which has The ester (a) is a solid at 25°C or an ester having a viscosity of 10,000 mPa·s or more at 25°C.

[0010] In addition, the hair treatment method of the present invention uses the multi-agent hair cosmetic of the present invention, applies the first agent to the hair, and without rinsing, further applies the second agent, or applies the second agent to the hair, and without rinsing, further applies the first agent.

Advantages of the Invention

[0011] According to the present invention, it is possible to provide a multi-agent hair cosmetic capable of imparting a uniform feel and thickness to the hair, and a hair treatment method using the multi-agent hair cosmetic.

Embodiments for Carrying Out the Invention

[0012] Hereinafter, the present invention will be described based on embodiments of the present invention (hereinafter referred to as the present embodiments).

[0013] <Multi-agent hair cosmetic> The multi-agent hair cosmetic of the present embodiment is applied to the hair and has a first agent and a second agent described below. In the multi-agent hair cosmetic of the present embodiment, by applying the first agent and the second agent to the hair separately, each compounding component including the amino-modified silicone and / or the ester (a) in the first agent can be uniformly acted on the entire hair by the second agent, and moreover, the effect of improving the thickness of the hair by the amino-modified silicone and / or the ester (a) can also be made good. Therefore, by using the multi-agent hair cosmetic of the present embodiment, it becomes possible to impart a uniform feel and thickness to the hair.

[0014] [First agent] The first agent (hereinafter sometimes referred to as the first agent) in the multi-agent hair cosmetic of the present embodiment contains a cationic surfactant, a higher alcohol, and an amino-modified silicone and / or an ester (a). The ester (a) is an ester that is solid at 25°C or has a viscosity of 10,000 mPa·s or more at 25°C. The "viscosity at 25°C" of the ester referred to in this specification means the viscosity 60 seconds after measurement at 25°C and 12 rpm using a B-type viscometer with a No. 4 rotor. Also, "solid at 25°C" in the ester (a) means that the viscosity cannot be measured because it exceeds the measurement upper limit under the above measurement conditions using a B-type viscometer.

[0015] (Cationic surfactant) Examples of the cationic surfactant blended in the first agent include a quaternary ammonium salt having a hydrocarbon group with 12 to 22 carbon atoms or a tertiary amine salt having a hydrocarbon group with 12 to 22 carbon atoms. Examples of the above salts include halogen salts and alkyl sulfates. The hydrocarbon group may be linear or branched, and may be saturated or unsaturated. The first agent may contain one or more cationic surfactants.

[0016] Examples of the quaternary ammonium salt having a hydrocarbon group with 12 to 22 carbon atoms include mono-long-chain alkyl-type quaternary ammonium salts (for example, stearyltrimethylammonium chloride, cetyltrimethylammonium chloride, behenyltrimethylammonium chloride, behenyltrimethylammonium methyl sulfate), di-long-chain alkyl-type quaternary ammonium salts (for example, dicocoyldimethylammonium chloride, distearyldimethylammonium chloride), and ethylene oxide (E.O.)-added type quaternary ammonium salts. Examples of the tertiary amine salt having a hydrocarbon group with 12 to 22 carbon atoms include fatty acid amidoamines (for example, dimethylaminopropylamide stearate), polyoxyethylene alkylamines (for example, polyoxyethylene oleylamine), and polyoxyethylene fatty acid amides.

[0017] The blending amount of the cationic surfactant blended in the first agent may be appropriately set. For example, it is 0.01% by mass or more and 10% by mass or less. Here, when the dosage form of the first agent is cream-like, the blending amount of the cationic surfactant in the first agent is, for example, 1% by mass or more and 10% by mass or less. From the viewpoint of making the hair feel softer, 2% by mass or more and 5% by mass or less is preferable. Further, when the dosage form of the first agent is liquid, the blending amount of the cationic surfactant in the first agent is, for example, 0.01% by mass or more and 10% by mass or less.

[0018] (Higher alcohol) As the higher alcohol blended in the first agent, a monohydric alcohol having 12 or more and 22 or less carbon atoms can be used. The first agent may be blended with one or more higher alcohols.

[0019] Examples of the higher alcohol include linear higher alcohols (for example, myristyl alcohol, cetyl alcohol, oleyl alcohol, stearyl alcohol, behenyl alcohol), and branched higher alcohols (for example, hexyl decanol, isocetyl alcohol, isostearyl alcohol, octyldodecanol).

[0020] The blending amount of the higher alcohol blended in the first agent may be appropriately set. For example, it is 0.1% by mass or more and 20% by mass or less. Here, when the dosage form of the first agent is cream-like, from the viewpoint of increasing the viscosity of the first agent, the blending amount of the higher alcohol in the first agent is preferably 1% by mass or more, and more preferably 5% by mass or more. Further, when the dosage form of the first agent is cream-like, from the viewpoint of making the hair feel softer, the blending amount of the higher alcohol in the first agent is preferably 15% by mass or less, and more preferably 10% by mass or less.

[0021] (Amino-modified silicone and / or ester (a)) The first agent contains amino-modified silicone and / or ester (a). These components have the effect of imparting thickness to hair to which a multi-agent hair cosmetic has been applied. The first agent may contain only one of amino-modified silicone and ester (a), or both may be contained. However, from the viewpoint of being able to impart more thickness, it is preferable that both amino-modified silicone and ester (a) are contained.

[0022] (Amino-modified silicone) The amino-modified silicone contained in the first agent is a silicone having an amino group in its structure. The first agent may contain one or more kinds of amino-modified silicone.

[0023] Examples of the amino-modified silicone include aminoethylaminopropylmethylsiloxane-dimethylsiloxane copolymer (trade name: amodimethicone in cosmetic labeling) and aminopropyldimethylsilicone (trade name in cosmetic labeling).

[0024] When amino-modified silicone is contained in the first agent, from the viewpoint of being able to impart more thickness to the hair, the content is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, and even more preferably 1% by mass or more. Also, when amino-modified silicone is contained in the first agent, from the viewpoint of reducing the oily feeling in the texture of the hair, the content of amino-modified silicone in the first agent is preferably 10% by mass or less, more preferably 5% by mass or less.

[0025] (Ester (a)) The ester (a) contained in the first agent is an ester that is solid at 25°C or an ester having a viscosity of 10,000 mPa·s or more at 25°C. The first agent may contain one or more kinds of ester (a). Note that as the ester (a) contained in the first agent, an ester that is solid at 25°C is preferable from the viewpoint of being able to impart a more uniform texture and thickness to the hair.

[0026] Examples of the ester (a) formulated in the first agent include esters of an acid and a monohydric alcohol (myristyl myristate, cetyl myristate, cetyl palmitate, ethyl stearate, butyl stearate, stearyl stearate, cetyl lactate); esters of a fatty acid and a sugar alcohol; esters of a fatty acid and glycerin; esters of a fatty acid diglyceride and a dicarboxylic acid; esters of a fatty acid and sterols (cholesteryl stearate, cholesteryl oleate, cholesteryl hydroxystearate, phytosteryl hydroxystearate, etc.); lanolin; esters of dimer acid (dimer dilinoleic acid dimer dilinoleyl bis(phytosteryl / behenyl / isostearyl), dimer dilinoleic acid (phytosteryl / isostearyl / cetyl / stearyl / behenyl), dimer dilinoleic acid dimer dilinoleyl).

[0027] Examples of the ester of a fatty acid and a sugar alcohol among the esters (a) include esters of dipentaerythritol and stearic acid (dipentaerythrityl pentaisostearate), esters of dipentaerythritol and isostearic acid, esters of dipentaerythritol and 12-hydroxystearic acid (dipentaerythrityl tripolyhydroxystearate, dipentaerythrityl hexahydroxystearate, etc.), esters of dipentaerythritol and mixed fatty acids (dipentaerythrityl hexa(hydroxystearic acid / stearic acid / rosin acid), dipentaerythrityl tetra(hydroxystearic acid / isostearic acid), etc.).

[0028] Examples of the ester of a fatty acid and glycerin among the esters (a) include esters of mixed fatty acids (mixed fatty acids containing caprylic acid, capric acid, myristic acid, stearic acid, etc.) and glycerin ((ethylhexanoic acid / stearic acid / adipic acid) glyceryl, tri(caprylic acid / capric acid / myristic acid / stearic acid) glyceryl, etc.).

[0029] Among the esters (a), examples of the ester of fatty acid diglyceride and dicarboxylic acid include diglyceryl adipate mixed fatty acid ester (diester of mixed diglyceryl of caprylic acid, capric acid, stearic acid, isostearic acid and hydroxystearic acid and adipic acid (such as bisdiglyceryl polyacyl adipate-2, etc.)).

[0030] As the ester (a) formulated in the first agent, from the viewpoint of being able to impart more uniform touch and thickness to the hair, bisdiglyceryl polyacyl adipate-2, hexa(hydroxystearic acid / stearic acid / rosin acid) dipentaerythrityl, dimer dilinoleic acid dimer dilinoleyl bis(phytosteryl / behenyl / isostearyl), dimer dilinoleic acid (phytosteryl / isostearyl / cetyl / stearyl / behenyl), lanolin are preferred.

[0031] When the ester (a) is formulated in the first agent, from the viewpoint of being able to impart more thickness to the hair, the blending amount is preferably 0.5% by mass or more, more preferably 1% by mass or more, and further preferably 2% by mass or more. Also, when the ester (a) is formulated in the first agent, from the viewpoint of reducing the oily feeling in the touch of the hair, the blending amount of the ester (a) in the first agent is preferably 15% by mass or less, and more preferably 10% by mass or less.

[0032] Usually, water is formulated as a solvent in the first agent. The blending amount of water in the first agent is, for example, 40% by mass or more and 90% by mass or less.

[0033] (Other components) In addition to the above components, the first agent can contain various components that are typically incorporated into ordinary hair cosmetics such as treatments, as needed. Examples of such components that can be incorporated include nonionic surfactants, anionic surfactants, resins (such as silicone resins and polyvinylpyrrolidone), oily components (hydrocarbons, fats and oils, waxes or esters (with a viscosity of less than 10,000 mPa·s at 25°C), fatty acids, silicones other than amino-modified silicones, ethers, etc.), cationic polymer compounds, anionic polymer compounds, water-soluble polyhydric alcohols (such as ethylene glycol, propylene glycol, 1,3-butylene glycol, dipropylene glycol, glycerin, sorbitol, polyethylene glycol, etc.), humectants (such as pyrrolidone carboxylate), proteins or protein degradation products (such as soy protein, gelatin, collagen, silk fibroin, elastin, etc.), preservatives (such as ethyl paraben and butyl paraben), activators (such as various amino acids, biotin, pantothenic acid derivatives, etc.), γ-alizarinol, vitamin E derivatives, lower alcohols (alcohols with 1 to 6 carbon atoms such as ethanol and isopropanol), thickeners (such as carboxyvinyl polymer), chelating agents, fragrances, and pigments (however, excluding cationic surfactants, higher alcohols, amino-modified silicones, and ester (a)).

[0034] (Dosage form) There are no particular restrictions on the dosage form of the first agent, and dosage forms such as liquid, gel, and cream can be adopted. When applying the first agent and the second agent on the hair in layers, from the perspective of facilitating the layered application of the first agent and the second agent on the hair by reducing the viscosity difference between the two agents, a cream form is preferred for the first agent. Here, the "applying in layers the first agent and the second agent" means applying either the first agent or the second agent to the hair without rinsing it off, and then applying the unapplied agent (either the first agent or the second agent) to the hair after application.

[0035] (Viscosity) When the first agent is in a cream form, its viscosity is, for example, 1000 mPa·s or more and 50000 mPa·s or less at 25°C. The viscosities of the first agent and the second agent described below in this specification are the values after 60 seconds measured at 25°C under the conditions of an appropriate rotational speed (such as 6 rpm, 12 rpm) using a rotor selected according to the viscosity in a B-type viscometer.

[0036] (pH) The pH of the first agent is, for example, 3.0 or more and 12.0 or less. Note that the pH values of the first agent and the second agent described below in this specification are the values measured at 25°C using a known pH meter.

[0037] The first agent can be prepared, for example, by mixing the above components according to a conventional method.

[0038] [Second agent] The second agent (hereinafter sometimes referred to as the second agent) in the multi-agent type hair cosmetic of this embodiment is in a cream form and contains an amphoteric surfactant or a nonionic surfactant.

[0039] (Amphoteric surfactant or nonionic surfactant) The second agent may contain only one of the amphoteric surfactant and the nonionic surfactant, or both.

[0040] (Amphoteric surfactant) As the amphoteric surfactant contained in the second agent, a known amphoteric surfactant used in hair cosmetics can be used. The second agent may contain one or more amphoteric surfactants.

[0041] Examples of the amphoteric surfactant include amide propyl betaine type amphoteric surfactants such as lauric acid amide propyl betaine (lauramidopropyl betaine), myristic acid amide propyl betaine (myristamidopropyl betaine), coconut oil fatty acid amide propyl betaine (cocamidopropyl betaine), isostearic acid amide propyl betaine (isostearamidopropyl betaine), linoleic acid amide propyl, palm kernel fatty acid amide propyl betaine; imidazoline type amphoteric surfactants such as undecyl-N-hydroxyethyl-N-carboxymethyl imidazolinium betaine, 2-alkyl-N-carboxymethyl-N-hydroxyethyl imidazolinium betaine; sulfobetaine type amphoteric surfactants such as lauryl hydroxy sulfobetaine (lauryl hydroxysultaine), sodium N-alkyl-N,N-dimethyl ammonium-N-propyl sulfonate, sodium N-alkyl-N,N-dimethyl ammonium-N-(2-hydroxypropyl) sulfonate, sodium N-fatty acid amide propyl-N,N-dimethyl ammonium-N-(2-hydroxypropyl) sulfonate; amide amine oxide type amphoteric surfactants such as lauric acid amide propyl dimethyl amine oxide; aminoacetic acid betaine type amphoteric surfactants such as lauryl dimethyl aminoacetic acid betaine (lauryl betaine) (among the descriptions of the above specific examples, the component names shown in parentheses are the cosmetic display names).

[0042] As the amphoteric surfactant formulated in the second agent, from the viewpoint of being able to more impart a uniform touch to the hair or being able to more impart thickness to the hair, amide propyl betaine type amphoteric surfactants, imidazoline type amphoteric surfactants, sulfobetaine type amphoteric surfactants, and aminoacetic acid betaine type amphoteric surfactants selected from myristic acid amide propyl betaine, isostearic acid amide propyl betaine, and coconut oil fatty acid amide propyl betaine are preferred.

[0043] As for the amphoteric surfactant blended in the second agent, from the viewpoint of imparting a more uniform texture to the hair, an amide propyl betaine type amphoteric surfactant selected from amidopropyl betaine and isostearic acid amide propyl betaine, an imidazoline type amphoteric surfactant, a sulfobetaine type amphoteric surfactant, and an aminoacetic acid betaine type amphoteric surfactant are preferable. Further, as the amphoteric surfactant blended in the second agent, from the viewpoint of imparting more thickness to the hair, an amide propyl betaine type amphoteric surfactant selected from isostearic acid amide propyl betaine and coconut oil fatty acid amide propyl betaine is preferable. Incidentally, as the amphoteric surfactant blended in the second agent, isostearic acid amide propyl betaine is particularly preferable from the viewpoint of imparting a more uniform texture and thickness to the hair.

[0044] When an amphoteric surfactant is blended in the second agent, the blending amount is preferably 0.1% by mass or more, more preferably 0.2% by mass or more, from the viewpoint of ensuring the function of the second agent such as uniformly adhering these components to the hair without impairing the effect of improving the thickness of the hair by the amino-modified silicone and / or ester (a) blended in the first agent. There is no particular limitation on the upper limit value of the blending amount of the amphoteric surfactant in the second agent, and for example, it may be 10% by mass or less, or may be 5% by mass or less.

[0045] (Nonionic surfactant) As the nonionic surfactant blended in the second agent, known nonionic surfactants used in hair cosmetics can be used. The second agent may be one blended with one or more nonionic surfactants.

[0046] Examples of the nonionic surfactant include alkyl alkanol type nonionic surfactants (such as coconut fatty acid N-methyl ethanolamide, lauric acid diethanolamide, palm kernel fatty acid diethanolamide, stearic acid monoethanolamide, lauric acid monoisopropanolamide, etc.), polyoxyethylene glycerin fatty acid esters, polyoxyethylene sorbit fatty acid esters (such as polyoxyethylene sorbit tetraoleate), polyglycerin fatty acid esters, polyethylene glycol derivatives of monoglycerides or diglycerides obtained from vegetable oils, polyoxyethylene polyoxypropylene alkyl ethers, polyoxyethylene polyoxypropylene alkylene ethers, polyoxyethylene alkyl ethers (such as polyoxyethylene cetyl ether), polyoxyethylene alkylene ethers (such as polyoxyethylene oleyl ether), polyoxypropylene alkyl ethers, polyoxypropylene alkylene ethers, sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters, and polyoxyethylene hydrogenated castor oil.

[0047] As the nonionic surfactant formulated in the second agent, polyoxyethylene alkylene ether is preferable from the viewpoint of imparting more uniform touch and thickness to the hair. For the polyoxyethylene alkylene ether, for example, those having 12 or more and 24 or less carbon atoms in the alkylene group and 1 or more and 100 or less average added moles of ethylene oxide can be used. As the polyoxyethylene alkylene ether, for example, polyoxyethylene oleyl ether having 1 or more and 100 or less average added moles of ethylene oxide may be used, or polyoxyethylene oleyl ether having 1 or more and 20 or less average added moles of ethylene oxide may be used.

[0048] When a nonionic surfactant is incorporated into the second agent, the amount thereof is preferably 0.1% by mass or more, more preferably 0.2% by mass or more, from the viewpoint of ensuring well the functions of the second agent such as uniformly adhering these components to the hair without impairing the effect of improving the hair thickness by the amino-modified silicone and / or ester (a) incorporated in the first agent. There is no particular limitation on the upper limit of the amount of the nonionic surfactant incorporated in the second agent, and for example, it may be 10% by mass or less, or may be 5% by mass or less.

[0049] (Oil component) The second agent is in a cream form and usually contains an oil component. Examples of the oil component that can be incorporated into the second agent include hydrocarbons, fats and oils, waxes, esters, higher alcohols, fatty acids, silicones, and ethers, and those containing one or more of these may be used. Note that the amount of the oil component incorporated in the second agent is, for example, 0.1% by mass or more and 20% by mass or less.

[0050] As the oil component in the second agent, higher alcohols are preferred from the viewpoint that the viscosity of the second agent can be adjusted relatively easily. Examples of the higher alcohols incorporated in the second agent include the same various higher alcohols as those exemplified above for the first agent. The second agent may contain one or more of these higher alcohols.

[0051] The amount of the oil component incorporated in the second agent may be an amount that can maintain the cream form. For example, when a higher alcohol is incorporated as the oil component, it is, for example, 0.1% by mass or more and 20% by mass or less.

[0052] Water is usually incorporated as a solvent into the second agent. The amount of water incorporated in the second agent is, for example, 40% by mass or more and 90% by mass or less.

[0053] (Other components) In addition to the above components, the second agent can contain various components that are typically included in ordinary hair cosmetics such as treatments, as needed. Examples of such components that can be included are cationic surfactants, anionic surfactants, resins (such as polyvinylpyrrolidone), cationic polymer compounds, anionic polymer compounds (such as hydroxypropyl starch phosphate or its salts), water-soluble polyhydric alcohols (such as ethylene glycol, propylene glycol, 1,3-butylene glycol, dipropylene glycol, glycerin, sorbitol, polyethylene glycol, etc.), moisturizing agents (such as pyrrolidone carboxylate), proteins or protein hydrolysates (such as soy protein, gelatin, collagen, silk fibroin, elastin, etc.), preservatives, activators (such as various amino acids, biotin, etc.), lower alcohols (alcohols with 1 to 6 carbon atoms such as ethanol and isopropanol), thickeners (such as carboxyvinyl polymer), chelating agents, fragrances, and pigments (however, amphoteric surfactants and nonionic surfactants are excluded).

[0054] From the perspective of the hair having a softer texture, the second agent preferably contains one or more cationic surfactants. Examples of the cationic surfactant include the same ones as those contained in the first agent. Also, the content of the cationic surfactant in the second agent is, for example, 1% by mass or more and 10% by mass or less.

[0055] (Hydroxypropyl starch phosphate or its salt) From the perspective of excellent application feel (softness of the hair when the second agent is applied to the hair), the second agent preferably contains hydroxypropyl starch phosphate or its salt. The content of hydroxypropyl starch phosphate or its salt in the second agent is, for example, 0.5% by mass or more and 10% by mass or less, but from the perspective of even better application feel, 3% by mass or more and 8% by mass or less is preferred.

[0056] The dosage form of the second agent is cream-like. The multi-agent hair cosmetic of the present embodiment contains an amphoteric surfactant or a nonionic surfactant, and by combining the cream-like second agent with the first agent, the action of the amino-modified silicone and / or ester (a) contained in the first agent can be effectively elicited, while enabling them to adhere uniformly over the entire hair, thereby imparting a uniform texture and thickness to the hair after application.

[0057] (Viscosity) The viscosity of the second agent is, for example, 1000 mPa·s or more and 50000 mPa·s or less at 25°C.

[0058] (pH) The pH of the second agent is, for example, 3.0 or more and 12.0 or less.

[0059] The second agent can be prepared, for example, by mixing the above components according to a conventional method.

[0060] (Applications) The multi-agent hair cosmetic of the present embodiment can be used, for example, as a multi-agent hair treatment, a hair shaping treatment agent (permanent wave agent, hair straightening agent), a pretreatment agent, an intermediate treatment agent, and a post-treatment agent for hair shaping treatment agents, or a pretreatment agent and a post-treatment agent for hair dyes or hair bleaching agents.

[0061] The multi-agent hair cosmetic of the present embodiment can be a two-agent hair cosmetic having the above first agent and second agent, but can also be a three-agent or more hair cosmetic (for example, a three-agent, four-agent hair cosmetic) further combined with another agent as needed. When the multi-agent hair cosmetic of the present embodiment is a three-agent or more hair cosmetic, it can be used in a mode without using another agent between the above first agent and second agent. The multi-agent hair cosmetic of the present embodiment may be a two-agent hair treatment having the first agent and the second agent, or a three-agent or more hair treatment.

[0062] (Method of use) In the multi-agent hair cosmetic of this embodiment, the order of using the first agent and the second agent is arbitrary. Therefore, after applying the first agent to the hair, the first agent may or may not be rinsed off from the hair, and then the second agent may be further applied. Also, after applying the second agent to the hair, the second agent may or may not be rinsed off from the hair, and then the first agent may be further applied. From the viewpoint of being able to further impart a uniform texture and thickness to the hair, after applying the first agent to the hair, without rinsing off the first agent from the hair, it is preferable to further apply the second agent, or after applying the second agent to the hair, without rinsing off the second agent from the hair, it is preferable to further apply the first agent.

[0063] In addition, from the viewpoint of being able to further impart a uniform texture and thickness to the hair, in the multi-agent hair cosmetic of this embodiment, after applying the first agent to the hair, without rinsing off the first agent from the hair, it is more preferable to further apply the second agent.

[0064] <Hair treatment method> The hair treatment method of this embodiment is a method of treating hair using the multi-agent hair cosmetic of this embodiment described above. When treating the hair, apply the first agent to the hair (for example, hair that has been washed with shampoo and rinsed with water), and without rinsing it off, further apply the second agent, or apply the second agent to the hair, and without rinsing it off, further apply the first agent, and use the multi-agent hair cosmetic.

[0065] Also, in the case of a multi-agent hair cosmetic of three agents or more that also includes agents other than the first agent and the second agent in the hair treatment method of this embodiment, the timing of applying the agents other than the first agent and the second agent can be before or after the application of the first agent, or before or after the application of the second agent, according to the characteristics of these agents. In addition, in the hair treatment method of this embodiment, when the multi-agent hair cosmetic of this embodiment used is a multi-agent hair cosmetic of three agents or more, the multi-agent hair cosmetic of three agents or more can be used in a mode where no other agent is used between the first agent and the second agent.

[0066] After applying all the agents of the multi-agent hair cosmetic, the hair can be washed with water and dried with a dryer or the like to finish.

Examples

[0067] Hereinafter, the present invention will be described in detail based on examples. However, the following examples do not limit the present invention. In Tables 1 and 2 below, the blending amounts of the respective components are shown in % so as to be 100% for the entire first agent, and in Tables 3 to 5, for the entire second agent. All of these % are mass %, and in these tables, the display of % is omitted and only the numerical values representing the blending amounts are shown.

[0068] (Preparation of the first agent) Using a cationic surfactant (stearyltrimethylammonium chloride, behenyltrimethylammonium chloride), a nonionic surfactant [polyoxyethylene oleyl ether (2 E.O.), polyoxyethylene sorbitol tetraoleate (60 E.O.)], a higher alcohol (cetyl alcohol, stearyl alcohol), an amino-modified silicone (amodimethicone), an ester (a) [bisdiglyceryl polyacyl adipate-2, hexakis (hydroxystearic acid / stearic acid / rosin acid) dipentaerythrityl, lanolin, tripolyhydroxystearic acid dipentaerythrityl], liquid paraffin, isopropanol, dipropylene glycol, glycerin, phenoxyethanol, lactic acid, and purified water, the first agents of Preparation Examples 1-1 to 1-8 were prepared by mixing according to a conventional method so as to have the compositions shown in Tables 1 and 2. Tables 1 and 2 also show the viscosities and pH values of the respective first agents.

[0069] Note that in polyoxyethylene oleyl ether (2E.O.) in Table 1 and Table 2, the "(2E.O.)" in parentheses, and in polyoxyethylene sorbitol tetraoleate (60E.O.), the "(60E.O.)" in parentheses mean that the average number of moles of ethylene oxide added is 2 and 60, respectively. Also, among the esters (a) in Table 1 and Table 2, bisdiglyceryl polyacyl adipate-2, hexa (hydroxystearic acid / stearic acid / rosin acid) dipentaerythrityl, and lanolin are esters that are solid at 25°C, and tripolyhydroxystearic acid dipentaerythrityl is an ester with a viscosity of 10,000 mPa·s or more at 25°C. Furthermore, "set to 100 in total" for the purified water in Table 1 and Table 2 means that the amount of purified water is added to the total amount of each component other than the purified water constituting the first agent so that it becomes 100%.

[0070]

Table 1

[0071]

Table 2

[0072] (Preparation of the second agent) Cationic surfactants (stearyl trimethyl ammonium chloride, behenyl trimethyl ammonium chloride), anionic surfactants (dicityl phosphate, ceteth-20 phosphate), nonionic surfactants [polyoxyethylene cetyl ether (40 E.O.), polyoxyethylene oleyl ether (20 E.O.)], higher alcohols (cetyl alcohol, stearyl alcohol, cetostearyl alcohol), amphoteric surfactants (isostearamidopropyl betaine, myristamidopropyl betaine, lauric acid amidopropyl betaine, coconut oil fatty acid amidopropyl betaine, 2-alkyl-N-carboxymethyl-N-hydroxyethyl imidazolinium betaine, lauryl hydroxysulfobetaine, lauryl dimethylaminoacetic acid betaine), hydroxypropyl starch phosphate, dipropylene glycol, isopropanol, sodium hydroxide, phenoxyethanol, and purified water were used to prepare the second agents of Preparation Examples 1-1 to 1-13 by mixing them according to a conventional method so as to have the compositions shown in Tables 3 to 5. The viscosity and pH of each second agent are also shown in Tables 3 to 5. In Preparation Examples 2-2 to 2-5 in Table 3, the slanted notation of viscosity indicates that the viscosity was too low to measure with a B-type viscometer.

[0073] In addition, the “40 E.O.” in parentheses in polyoxyethylene cetyl ether (40 E.O.) and the “20 E.O.” in parentheses in polyoxyethylene oleyl ether (20 E.O.) in Tables 3 to 5 each mean that the average number of moles of ethylene oxide added is 40 and 20, respectively. Also, “total 100” for purified water in Tables 3 to 5 means that the amount of purified water was added to the total amount of each component other than purified water constituting the second agent so as to be 100%. Furthermore, “solubilized” in Preparation Example 2-5 in Table 3 means a state (solution) in which all of the added components are dissolved in the solvent.

[0074]

Table 3

[0075]

Table 4

[0076]

Table 5

[0077] (Evaluation of Multi - agent Hair Cosmetics) Examples 1 - 15, Comparative Examples 1 - 5 The first agents of Preparation Examples 1 - 1 to 1 - 8 and the second agents of Preparation Examples 2 - 1 to 2 - 13 were combined as shown in Tables 6 - 10 to obtain the multi - agent hair cosmetics of Examples 1 - 15 and Comparative Examples 1 - 5.

[0078] For the obtained multi - agent hair cosmetics, the combability, uniformity of touch, and thickness of the hair were evaluated by the following method.

[0079] A plurality of black hair bundles (hair bundles consisting of human hair with a length of 20 cm, 5 g per hair bundle) collected from Japanese women of the same person were prepared and distributed, one bundle each, to 5 evaluators who routinely evaluate hair treatments. Then, each of the evaluators evaluated these hair bundles according to the following procedure.

[0080] First, the hair bundles were rinsed with water, further washed with shampoo [“Grand Linkage Willow Lux Shampoo” (trade name) manufactured by Milbon Co., Ltd.], and then rinsed with water. Next, 0.5 g of the first agent related to the multi - agent hair cosmetics of either the example or the comparative example was taken by hand and applied to the washed hair bundles and kneaded for about 10 seconds. Subsequently, 0.5 g of the second agent related to the multi - agent hair cosmetics of either the example or the comparative example was taken by hand and applied to the hair bundles after the first agent was applied, kneaded for about 10 seconds, and then rinsed with water. At this time, the combability of the hair (the combability of wet hair) was evaluated. Then, the hair bundles after rinsing with water were dried using a dryer to finish, and the uniformity of touch and thickness of the hair after finishing were evaluated.

[0081] Regarding the multi-agent hair cosmetic of Example 1, evaluation was also conducted when the application order of the first agent and the second agent to the hair bundle was changed (when the second agent was applied to the hair bundle after washing first, and then the first agent was applied).

[0082] In the evaluation of the combability of wet hair, the uniformity of the feel of the hair, and the thickness of the hair, first, each evaluator used the multi-agent hair cosmetic of Comparative Example 4 as a reference (3 points), and scored in increments of 0.5 points, with a very poor case being 1 point and a very good case being 5 points, and ranked according to the following criteria.

[0083] [Ranking of scores by each evaluator] 2 ranks: The evaluation score by the evaluator is 4.5 points or 5 points (considerably better (4.5 points) or very good (5 points) than Comparative Example 4 (reference)). 1 rank: The evaluation score by the evaluator is 3.5 points or 4 points (slightly better (3.5 points) or good (4 points) than Comparative Example 4 (reference)). 0 rank: The evaluation score by the evaluator is 3 points (almost equivalent to Comparative Example 4 (reference)). -1 rank: The evaluation score by the evaluator is 2 points or 2.5 points (slightly worse (2 points) or worse (2.5 points) than Comparative Example 4 (reference)). -2 ranks: The evaluation score by the evaluator is 1 point or 1.5 points (very bad (1 point) or considerably bad (1.5 points) than Comparative Example 4 (reference)).

[0084] Next, for each evaluation item, the values of the ranks given by all evaluators were summed to calculate the average value (average rank), and the final ranking was performed according to the following criteria.

[0085] [Ranking by average rank] ◎◎◎: The average rank is 1.5 or more. ◎◎: The average rank is 1 or more and less than 1.5. ◎: The average rank is 0.5 or more and less than 1. ○: The average rank is 0.1 or more and less than 0.5. Equivalent: The average rank is 0. △: The average rank is -0.5 or more and less than 0. ×: The average rank is -1 or more and less than -0.5. ××: The average rank is -1.5 or more and less than -1. ×××: The average rank is less than -1.5.

[0086] Also, regarding the multi-agent hair cosmetics of Example 1 and Example 15, for the application feeling (softness of the hair when the second agent is applied to the hair) when the first agent is first applied to the hair bundle after washing and then the second agent is applied and rubbed in, except when using the multi-agent hair cosmetics of Example 1 as a reference, the same method such as the combability of wet hair was used to score by each evaluator, calculate the average rank, and perform the final ranking.

[0087] These results are also shown in Tables 6 to 10. In Tables 6 to 10, "1→2" in the "application order" means that the first agent and the second agent were applied to the hair bundle in this order, and "2→1" means that the second agent and the first agent were applied to the hair bundle in this order. Also, in Table 6, regarding the multi-agent hair cosmetics of Example 1, when the first agent was first applied to the hair bundle, it is simply described as "Example 1", and when the second agent was first applied to the hair bundle, it is described as "Example 1-2".

[0088]

Table 6

[0089]

Table 7

[0090]

Table 8

[0091]

Table 9

[0092]

Table 10

[0093] As shown in Table 6, the multi-agent hair cosmetic of Example 1, which is a combination of a first agent containing a cationic surfactant, a higher alcohol, an amino-modified silicone, and an ester (a) and a creamy second agent containing an amphoteric surfactant, when applied to a tuft of hair in the order of the first agent and then the second agent, and when applied to a tuft of hair in the order of the second agent and then the first agent (Example 1-2), in both cases, the uniformity and thickness of the texture of the hair after finishing were better than those of the multi-agent hair cosmetics of Comparative Examples 1 to 4 using a liquid second agent. Also, in the multi-agent hair cosmetic of Example 1, the texture of the wet hair before rinsing with water was also good. Incidentally, the multi-agent hair cosmetic of Example 1 applied to a tuft of hair in the order of the first agent and then the second agent had better uniformity and thickness of the texture of the hair after finishing than the multi-agent hair cosmetic of Example 1-2 applied to a tuft of hair in the order of the second agent and then the first agent.

[0094] Table 7 shows the evaluation results of the multi-agent hair cosmetics of Examples 2 to 7, in which the amphoteric surfactant formulated in the second agent of the multi-agent hair cosmetic of Example 1 was changed, and the multi-agent hair cosmetic of Example 8, in which a nonionic surfactant was formulated in the second agent instead of the amphoteric surfactant. As shown in this Table 7, in any case of using these multi-agent hair cosmetics, the uniformity and thickness of the texture of the hair after finishing were good. Among these, in the case of the multi-agent hair cosmetic of Example 1 having a second agent using isostearamidopropyl betaine, all of these results were particularly good. Also, regarding the texture of the wet hair before rinsing with water, the case of the multi-agent hair cosmetic of Example 1 having a second agent using isostearamidopropyl betaine was particularly good compared to the multi-agent hair cosmetics of other examples, and the cases of the multi-agent hair cosmetics of Example 6 having a second agent using lauryl hydroxysulfobetaine and Example 7 having a second agent using lauryldimethylaminoacetic acid betaine were also relatively good.

[0095] Table 8 shows the evaluation results of the multi-agent hair cosmetics of Example 9, in which the first agent of the multi-agent hair cosmetics of Example 1 was changed to a formulation containing only amino-modified silicone without using ester (a), the multi-agent hair cosmetics of Example 10, in which the first agent was changed to a formulation containing only ester (a) without using amino-modified silicone, and the multi-agent hair cosmetics of Example 11, in which the amounts of amino-modified silicone and ester (a) were reduced. As shown in this Table 8, in the case of using any of the multi-agent hair cosmetics, the uniformity and thickness of the texture of the hair after finishing were good. Among these, in the case of the multi-agent hair cosmetics of Example 1 having the first agent using a relatively high amount of amino-modified silicone and ester (a), all of these results were particularly good. Also, regarding the texture of the wet hair before rinsing with water, the case of the multi-agent hair cosmetics of Example 11 was as good as that of the multi-agent hair cosmetics of Example 1, and the case of the multi-agent hair cosmetics of Example 9 was also relatively good.

[0096] Table 9 shows the evaluation results of the multi-agent hair cosmetics of Examples 12 to 14, in which the type of ester (a) in the first agent of the multi-agent hair cosmetics of Example 1 was changed, and the multi-agent hair cosmetics of Comparative Example 5, in which the first agent was changed to a formulation containing liquid paraffin as a comparative component without using amino-modified silicone and ester (a). As shown in this Table 9, in the case of using the multi-agent hair cosmetics of Examples 12 to 14, the uniformity and thickness of the texture of the hair after finishing were good, similar to the case of using the multi-agent hair cosmetics of Example 1. On the other hand, in the case of using the multi-agent hair cosmetics of Comparative Example 5, both the uniformity and thickness of the texture of the hair after finishing were inferior.

[0097] As shown in Table 9, the evaluation results of the feel uniformity and thickness of the hair after finishing are the same between the multi-agent hair cosmetic of Example 13 and the multi-agent hair cosmetic of Example 14. However, the average rank values are "feel of hair: 0.8" and "thickness of hair: 0.8" when using the multi-agent hair cosmetic of Example 13, while they are "feel of hair: 0.6" and "thickness of hair: 0.6" when using the multi-agent hair cosmetic of Example 14. The multi-agent hair cosmetic of Example 13 had better evaluation results. In the multi-agent hair cosmetics of Examples 1, 12, and 13, ester (a) that is solid at 25°C was used in the first agent, while in the multi-agent hair cosmetic of Example 14, paste-like ester (a) that is not solid was used in the first agent. It was confirmed that better results tend to be obtained when using ester (a) that is solid at 25°C.

[0098] Regarding the feel of the wet hair before rinsing with water, the cases of the multi-agent hair cosmetics of Examples 12 and 13 were as good as those of the multi-agent hair cosmetic of Example 1, and the case of the multi-agent hair cosmetic of Example 14 was also relatively good.

[0099] Table 10 shows the evaluation results of the multi-agent hair cosmetic of Example 15, in which the second agent of the multi-agent hair cosmetic of Example 1 was changed to one further blended with hydroxypropyl starch phosphate. As shown in this Table 10, when using the multi-agent hair cosmetic of Example 15, although the feel uniformity at the time of finishing was inferior to that of the multi-agent hair cosmetic of Example 1, the application feel after applying the second agent was greatly improved compared to that of the multi-agent hair cosmetic of Example 1.

Claims

1. A first agent containing a cationic surfactant, a higher alcohol, and an amino-modified silicone and / or an ester (a), and A creamy second agent containing an amphoteric surfactant or a nonionic surfactant A multi-agent hair cosmetic having the above. The above ester (a): an ester that is solid at 25°C or an ester having a viscosity of 10,000 mPa·s or more at 25°C.

2. The multi-agent hair cosmetic according to Claim 1, wherein hydroxypropyl starch phosphate or a salt thereof is further blended in the second agent.

3. The multi-agent hair cosmetic according to Claim 1 or Claim 2, wherein the ester (a) is solid at 25°C.

4. As the above amphoteric surfactant, an amide propyl betaine type amphoteric surfactant selected from amidopropyl betaine, isostearic acid amide propyl betaine, and coconut oil fatty acid amide propyl betaine, an imidazoline type amphoteric surfactant, a sulfobetaine type amphoteric surfactant, or an aminoacetic acid betaine type amphoteric surfactant, any one or two or more of which are blended. The multi-agent hair cosmetic according to Claim 1 or Claim 2.

5. The multi-agent hair cosmetic according to Claim 1 or Claim 2, wherein the first agent is applied to the hair and, without rinsing, the second agent is further applied.

6. A hair treatment method using the multi-agent hair cosmetic according to Claim 1 or Claim 2, comprising: Applying the first agent to the hair and, without rinsing, further applying the second agent, or Applying the second agent to the hair and, without rinsing, further applying the first agent.

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