Hair treatment agent, hair treatment agent set, and hair treatment method

Abstract

To provide a hair treatment agent that is suitable for suppressing the discoloration of dyed hair due to heat.SOLUTION: The present disclosure provides a hair treatment agent that is suitable for suppressing the discoloration of dyed hair due to heat, the hair treatment agent containing components (A) and (B). The component (A) is represented by the following general formula. In the formula (A), n is 1 or 2, R is a C9-22 linear or branched, saturated or unsaturated hydrocarbon group. The component (B) is a permeation component. The component (B) has a molecular weight of 280 or less.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a hair treatment agent, a hair treatment agent set, and a hair treatment method, and more specifically, to a hair treatment agent that can suppress discoloration even when dyed hair is heated, and a hair treatment agent set and a hair treatment method using the same. [Background technology]

[0002] In the market, fashion colors that lighten hair and gray colors that dye gray hair are widely used. Hair dyed with these hair dyes fades as it is washed repeatedly with a detergent such as shampoo. For this reason, anti-fading agents for hair washing have been proposed.

[0003] For example, Patent Document 1 describes that a discoloration prevention agent containing a lactone derivative is applied to hair, followed by heat treatment, to prevent discoloration of dyed hair. In the technology described in Patent Document 1, in order to obtain a discoloration prevention effect when washing hair, the discoloration prevention agent is applied to the hair, and then immediately heat-treated without washing. It is considered that the lactone derivative is fixed to the hair by reacting with the surface of the hair, etc., through this heat treatment. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2015-140326 A Summary of the Invention [Problem to be solved by the invention]

[0005] In beauty salons and at home, dyed hair is often subjected to finishing treatment involving heating using a hair iron or the like. According to the studies of the present inventors, the dye is decomposed or inactivated during this finishing treatment, which can cause discoloration of the hair. However, conventional anti-fading agents are not designed to suppress discoloration of hair due to heat.

[0006] The present invention aims to provide a hair treatment agent suitable for suppressing discoloration of dyed hair due to heat. Another aim of the present invention is to provide a hair treatment agent set suitable for suppressing fading due to washing and discoloration due to heat for dyed hair. [Means for solving the problem]

[0007] The present invention provides a hair treatment composition for inhibiting discoloration of dyed hair due to heat, comprising the following components (A) and (B): [ka] [In formula (A), n is 1 or 2, and R is a linear or branched, saturated or unsaturated hydrocarbon group having 9 to 22 carbon atoms.] (B) Penetrating components with molecular weights of 280 or less

[0008] From another aspect, the present invention provides A first agent containing polyquaternium-22; A second agent which is the hair treatment agent described above; To provide a hair treatment set comprising:

[0009] From another aspect, the present invention provides The present invention provides a method for treating hair to inhibit discoloration of dyed hair due to heat, the method comprising applying to the hair a hair treatment agent containing the following components (A) and (B): [ka] [In formula (A), n is 1 or 2, and R is a linear or branched, saturated or unsaturated hydrocarbon group having 9 to 22 carbon atoms.] (B) Penetrating components with molecular weights of 280 or less Effect of the Invention

[0010] The hair treatment agent according to the present invention is suitable for suppressing discoloration of dyed hair due to heat. The hair treatment agent set according to the present invention is suitable for suppressing fading due to washing and discoloration due to heat. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, embodiments of the present invention will be described, but the present invention is not limited to the following embodiments.

[0012] (Embodiment 1) Component (A) is a lactone derivative and is represented by the following general formula: [ka]

[0013] In formula (A), n is 1 or 2. When n=1, the lactone derivative has a 5-membered ring. When n=2, the lactone derivative has a 6-membered ring. R is a linear or branched, saturated or unsaturated hydrocarbon group having 9 to 22 carbon atoms.

[0014] R in formula (A) is not particularly limited as long as it is a linear or branched, saturated or unsaturated hydrocarbon group having 9 to 22 carbon atoms. From the viewpoint of the stability of the hair treatment agent, R may be a saturated hydrocarbon group. Examples of R include nonyl, decyl, undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl, nonadecyl, eicosyl, henicosyl, and docosyl groups.

[0015] The content of component (A) is not particularly limited, and may be 0.005% by mass or more, may be in the range of 0.01 to 10.0% by mass, or may be in the range of 0.1 to 5.0% by mass, based on the total mass of the hair treatment agent. By appropriately adjusting the content of component (A), the hair treatment agent can have a more excellent effect of inhibiting discoloration due to heat.

[0016] When the hair treatment agent is applied to dyed hair and then the hair is subjected to a heat treatment using a hair iron or the like, component (A) may react with other chemical species or the surface of the hair. This reaction is thought to involve the opening of the lactone ring. The thermal energy from the hair iron or the like is consumed to a certain extent in the reaction involving component (A). This is thought to enable the hair treatment agent of the present embodiment to exhibit an effect of inhibiting discoloration due to heat.

[0017] Component (B) is a penetrating component. The penetrating component means a compound that can penetrate into hair. Oxidative hair dyes that can generally be used for dyeing hair have a high pH, ​​so that hair swells during dyeing. The hair treatment agent contains component (B), so it is easy to penetrate into hair and is easy to remain in hair even without heating. Furthermore, it can also improve the texture of hair (softness and smoothness to the touch). By blending component (B), the hair treatment agent of this embodiment can be washed after application to hair and before heating the hair. For this washing, running water or a washing agent may be used. Washing is, for example, washing with shampoo or the like. In contrast, in the technology of Patent Document 1, the hair is immediately heated after the anti-fading agent is applied to the hair.

[0018] The penetrating component is, for example, a carboxylate ester. Examples of the carboxylate ester include isodecyl pivalate, diisopropyl adipate, and diethyl sebacate. The component (B) may contain at least one selected from the group consisting of isodecyl pivalate, diisopropyl adipate, and diethyl sebacate. The component (B) may be at least one selected from the group consisting of isodecyl pivalate, diisopropyl adipate, and diethyl sebacate.

[0019] Component (B) may be a mixture of two or more selected from the group consisting of isodecyl pivalate, diisopropyl adipate, and diethyl sebacate. In this case, the content of each compound in component (B) is not particularly limited. The content of each compound in component (B) may be the same or different.

[0020] The molecular weight of component (B) may be 280 or less, 270 or less, or 260 or less. When the molecular weight of component (B) is within this range, component (B) is more likely to penetrate into hair. As a result, the hair treatment agent can have a more excellent discoloration suppression effect.

[0021] The lower limit of the content of component (B) is not particularly limited, and may be 0.01% by mass or 0.1% by mass, based on the total mass of the hair treatment agent. The upper limit of the content of component (B) is not particularly limited, and may be 30% by mass, 20% by mass, 10% by mass, or 5% by mass, based on the total mass of the hair treatment agent. By appropriately adjusting the content of component (B), the hair treatment agent can have a better discoloration suppression effect.

[0022] The ratio of the content of component (B) to the content of component (A) may be in the range of 0.001 to 2000, 0.005 to 400, 0.01 to 200, 0.02 to 24, or 0.05 to 22, on a mass basis. By appropriately adjusting the ratio of the content of component (B) to the content of component (A), the hair treatment agent can have a more excellent discoloration suppression effect.

[0023] The pH of the hair treatment agent is preferably acidic. The pH of the hair treatment agent may be less than 7.0, may be 2.0 to 6.5, or may be 3.0 to 5.0. When the pH of the hair treatment agent is acidic, it can close the swollen hair. That is, when the pH of the hair treatment agent is acidic, it can easily close the cuticle opened by application of an oxidative hair dye or the like. As a result, it can suppress the outflow of dye due to washing. Furthermore, by treating the hair with the hair treatment agent, it is possible to bring the pH of the hair after dyeing closer to the isoelectric point of hair, which is pH 4.0 to 5.5. As a result, the hair treatment agent can have a better discoloration suppression effect and can also improve the hair treatment effect.

[0024] In order to suppress discoloration of the hair dye due to heat, the hair treatment agent may further contain a collagen derivative.

[0025] The collagen derivative is not particularly limited. Examples of collagen derivatives include hydrolyzed collagen, hydroxypropyltrimonium hydrolyzed collagen, cocodimonium hydroxypropyl hydrolyzed collagen, isostearoyl hydrolyzed collagen, isostearoyl hydrolyzed collagen AMP, isostearoyl hydrolyzed collagen AMPD, cocoyl hydrolyzed collagen, cocoyl hydrolyzed collagen K, cocoyl hydrolyzed collagen Na, cocoyl hydrolyzed collagen TEA, undecylenoyl hydrolyzed collagen K, (dihydroxymethylsilylpropoxy)hydroxypropyl hydrolyzed collagen, collagen amino acid, collagen extract, collagen water, succinyl atelocollagen, succinoyl atelocollagen, Saccharomyces / (hydrolyzed collagen / sucrose) fermentation liquid, steardimonium hydroxypropyl hydrolyzed collagen, stearoyl hydrolyzed collagen K, stearoyl hydrolyzed collagen Na, stearoyl hydrolyzed collagen Saccharomyces / sucrose ... Examples of such collagen include thearamidoethyldiethonium succinoyl hydrolyzed collagen, desamidocollagen, palmitoyl collagen amino acid, procollagen, myristoyl succinyl atelocollagen, myristoyl hydrolyzed collagen, myristoyl hydrolyzed collagen K, lauryldimonium hydroxypropyl hydrolyzed collagen, lauroyl collagen amino acid (Na / TEA), lauroyl collagen amino acid Na, lauroyl collagen amino acid TEA, lauroyl hydrolyzed collagen K, lauroyl hydrolyzed collagen Na, rosin hydrolyzed collagen, rosin hydrolyzed collagen AMPD, lactobacillus / collagen fermentation liquid, lactobacillus / hydrolyzed collagen fermentation liquid extract, hydrolyzed collagen PG propyl methylsilanediol, hydrolyzed collagen extract, hydrolyzed collagen ethyl, hydrolyzed collagen hexadecyl, water-soluble collagen, and water-soluble collagen crosspolymer.

[0026] The hair to which the hair treatment agent of the present embodiment is applied is not particularly limited as long as it is hair dyed by a commonly used method. Specific examples of dyed hair include hair dyed with a hair dye using an acid dye, a basic dye, a nitro dye, or the like, or a hair dye mainly containing an oxidation dye.

[0027] The hair treatment agent may contain any ingredient other than the ingredients described above. The optional ingredient may be an ingredient contained in a known hair treatment agent.

[0028] Optional components may be appropriately blended, such as nonionic surfactants, amphoteric surfactants, cationic surfactants, anionic surfactants, esters, higher fatty acids, oils and fats, higher alcohols, lower alcohols, fluorine compounds, silicones, UV absorbers, antioxidants, preservatives, plant extracts, hydrolyzed proteins, amino acids, fragrances, essential oils, pigments, water, pH stabilizers, chelating agents, solvents, anti-inflammatory agents, and gelling agents.

[0029] Nonionic surfactants include polyoxyethylene alkyl ethers, polyoxyethylene sorbitan fatty acid esters, sorbitan fatty acid esters, polyoxyethylene hydrogenated castor oil, alkyl glucosides, lipophilic glyceryl monostearate, and coconut oil fatty acid diethanolamide.

[0030] Examples of amphoteric surfactants include glycine-type amphoteric surfactants, aminopropionic acid-type amphoteric surfactants, aminoacetic acid betaine-type amphoteric surfactants, and sulfobetaine-type amphoteric surfactants. Examples of glycine-type amphoteric surfactants include alkyl glycine salts, carboxymethyl glycine salts, N-acylaminoethyl-N-2-hydroxyethyl glycine salts, and alkyl polyamino polycarboxy glycine salts. Examples of aminopropionic acid-type amphoteric surfactants include alkyl aminopropionate salts, alkyl imino dipropionate salts, and N-acylaminoethyl-N-2-hydroxyethyl propionate salts. Examples of aminoacetic acid betaine-type amphoteric surfactants include alkyl dimethyl aminoacetic acid betaine, fatty acid amidopropyl dimethyl aminoacetic acid betaine, and alkyl dihydroxyethyl aminoacetic acid betaine. Examples of sulfobetaine-type amphoteric surfactants include alkyl hydroxy sulfobetaine.

[0031] Cationic surfactants include alkyl quaternary ammonium salts, alkenyl quaternary ammonium salts, alkyl amine salts, and fatty acid amide amine salts.Alkyl quaternary ammonium salts include cetrimonium chloride, cetrimonium bromide, steartrimonium chloride, steartrimonium bromide, behentrimonium chloride, behentrimonium bromide, stearalkonium chloride, benzalkonium chloride, stearoxypropyltrimonium chloride, distearyldimonium chloride, distearyldimonium bromide, dibehenyldimonium chloride, dibehenyldimonium bromide, dicetyldimonium chloride, dicetyldimonium bromide, dilauryldimonium chloride, and dilauryldimonium bromide. Alkenyl quaternary ammonium salts include cetyloxypropyl trimonium chloride, stearoxypropyl trimonium chloride, behenyloxypropyl trimonium chloride, lauroxypropyl trimonium bromide, myristyloxypropyl trimonium bromide, cetyloxypropyl trimonium bromide, stearoxypropyl trimonium bromide, and behenyloxypropyl trimonium bromide.Alkylamine salts include lauramidopropyl dimethylamine, myristamidopropyl dimethylamine, palmitamidopropyl dimethylamine, stearamidopropyl dimethylamine, oleamidopropyl dimethylamine, isostearamidopropyl dimethylamine, arachimididopropyl dimethylamine, behenamidopropyl dimethylamine, coconut oil fatty acid amidopropyl dimethylamine, palm kernel oil fatty acid amidopropyl dimethylamine, beef tallow fatty acid amidopropyl dimethylamine, stearamidoethyl diethylamine, arachimididoethyl diethylamine, and behenamidoethyl diethylamine.Examples of fatty acid amide amine salts include myristic acid dimethylaminopropylamide, palmitic acid dimethylaminopropylamide, stearic acid dimethylaminopropylamide, behenic acid dimethylaminopropylamide, myristic acid diethylaminoethylamide, palmitic acid diethylaminoethylamide, stearic acid diethylaminoethylamide, behenic acid diethylaminoethylamide, myristic acid diethylaminopropylamide, palmitic acid diethylaminopropylamide, stearic acid diethylaminopropylamide, and behenic acid diethylaminopropylamide.

[0032] Examples of anionic surfactants include alkyl ether sulfates, alkyl sulfates, alkyl ether sulfate esters, alkenyl ether sulfates, alkenyl sulfates, olefin sulfonates, alkanesulfonates, saturated or unsaturated fatty acid salts, alkyl ether carboxylates, alkenyl ether carboxylates, α-sulfonic acid salts, phosphoric acid monoester surfactants, phosphoric acid diester surfactants, sulfosuccinates, N-acyl glutamic acid, N-acyl methyl taurine salts, alkyl sulfosuccinates, polyoxyethylene alkyl ether phosphoric acid, and derivatives thereof. Examples of alkyl ether sulfate esters include sodium polyoxyethylene lauryl ether sulfate. Examples of alkyl sulfates include sodium lauryl sulfate and sodium cetyl sulfate. Examples of derivatives of alkyl sulfates include sodium polyoxyethylene lauryl sulfate. Examples of alkyl ether carboxylates include sodium laureth-4 carboxylate. Examples of sulfosuccinate esters include disodium lauryl sulfosuccinate.

[0033] Esters include isostearyl myristate, octyldodecyl myristate, isononyl isononanoate, and stearyl stearate.

[0034] Higher fatty acids include myristic acid, palmitic acid, stearic acid, oleic acid, isostearic acid, and isopalmitic acid.

[0035] The fats and oils include animal and vegetable oils, lanolin, squalene, liquid paraffin, beeswax, and carnauba wax.The animal and vegetable oils include avocado oil, olive oil, safflower oil, pomegranate seed oil, and hydrogenated oil.

[0036] The number of carbon atoms of the higher alcohol is not particularly limited and may be 8 to 30 or 14 to 22. The higher alcohol may be a saturated alcohol or an unsaturated alcohol. Examples of the higher alcohol include lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol, cetearyl alcohol, oleyl alcohol, and behenyl alcohol.

[0037] Lower alcohols include ethanol and isopropanol.

[0038] The formulation of the hair treatment agent is not particularly limited, and any known formulation may be used. Preferred formulations are gel, solution, cream, or emulsion. When the hair treatment agent has an appropriate viscosity, it is less likely to drip when applied to hair, and can be applied evenly to hair. Therefore, it is easier to reliably obtain an excellent discoloration suppression effect.

[0039] (Embodiment 2) This embodiment relates to a hair treatment set. More specifically, this embodiment relates to a hair treatment set that can improve the discoloration suppression effect by using a combination of a first agent containing polyquaternium-22 and a second agent that is the hair treatment described in the above-mentioned embodiment 1 on dyed hair.

[0040] The first agent of the present embodiment contains polyquaternium-22. Polyquaternium-22 is a copolymer of dimethyldiallylammonium chloride and acrylic acid. The first agent contains polyquaternium-22, which provides an excellent effect of inhibiting fading when washing hair after dyeing, particularly when shampooing.

[0041] The content of polyquaternium-22 is not particularly limited, and may be in the range of 0.01 to 15.0% by mass, 0.03 to 12.0% by mass, or 0.05 to 10.0% by mass, based on the total mass of the first agent. By appropriately adjusting the content of polyquaternium-22, the first agent has an excellent effect of inhibiting fading, and also has a good feel after washing.

[0042] The first agent of this embodiment is used after dyeing and before washing. That is, the first agent is applied to dyed hair, and then the first washing after dyeing is performed. Polyquaternium-22 may be added to a cleaning agent such as shampoo. However, when polyquaternium-22 is applied to hair and then washed, the foam during washing is finer and the hair feels smoother than when a cleaning agent containing polyquaternium-22 is used.

[0043] The first agent may further contain a polyhydric alcohol. The polyhydric alcohol can further improve the fading inhibition effect. The polyhydric alcohol means a compound having two or more hydroxyl groups in one molecule.

[0044] Examples of polyhydric alcohols include ethylene glycol, propylene glycol, 1,3-butylene glycol, 1,4-butanediol, 1,2-pentanediol, 1,2-hexanediol, 1,6-hexanediol, neopentyl glycol, 1,8-octanediol, 1,10-decanediol, diethylene glycol, spiroglycol, propylene glycol, dipropylene glycol, glycerin, and diglycerin. Only one selected from these polyhydric alcohols may be used, or two or more may be used in combination.

[0045] The polyhydric alcohol may include at least one selected from the group consisting of glycerin, propylene glycol, 1,3-butylene glycol, and dipropylene glycol. The polyhydric alcohol may be at least one selected from the group consisting of glycerin, propylene glycol, 1,3-butylene glycol, and dipropylene glycol.

[0046] The lower limit of the polyhydric alcohol content is not particularly limited, and may be 1 mass%, 10 mass%, or 30 mass% based on the total mass of the hair treatment composition. The upper limit of the polyhydric alcohol content is not particularly limited, and may be 99 mass%, 95 mass%, 90 mass%, or 85 mass% based on the total mass of the hair treatment composition. By appropriately adjusting the polyhydric alcohol content, a hair treatment composition having a better fading suppression effect can be obtained.

[0047] The first agent may further contain a thickener. By containing a thickener, when the first agent is applied to hair, it is difficult to drip and can be applied evenly to the hair. Therefore, it is easy to reliably obtain an excellent fading suppression effect. Examples of the thickener include hydroxyethyl cellulose.

[0048] The first agent may contain any ingredient other than the ingredients described above. The optional ingredient may be an ingredient contained in the known hair treatment agent described in embodiment 1.

[0049] It is preferable that the first agent is substantially free of anionic surfactants. "Substantially free" means that a small amount of anionic surfactant is allowed to be mixed in, and the amount is less than 2% by mass, further less than 1% by mass, and particularly less than 0.5% by mass, based on the total mass of the first agent. By making the first agent substantially free of anionic surfactants, it is possible to obtain a first agent that has high stability over a long period of time.

[0050] The formulation of the first agent is not particularly limited, and any known formulation can be used. Preferred formulations are gel, solution, cream, or emulsion. If the first agent has an appropriate viscosity, it is less likely to drip when applied to hair and can be applied evenly to hair. Therefore, it is easier to reliably obtain an excellent fading suppression effect.

[0051] The second agent of this embodiment is the hair treatment agent described in embodiment 1 above.

[0052] The hair treatment agent set is used, for example, as follows. The first agent is used after dyeing and before washing. That is, the first agent containing polyquaternium-22 is applied to the dyed hair. Then, the hair is washed with a detergent containing an anionic surfactant. After washing, the hair is drained and the second agent containing the hair treatment agent is applied to the hair. Then, the hair is washed as necessary. The washing may be done with running water or with a detergent such as shampoo. By using the first agent and the second agent on the dyed hair, it is possible to suppress discoloration due to washing immediately after dyeing while suppressing discoloration due to heat treatment such as a hair iron. Furthermore, in a preferred embodiment, by using the first agent and the second agent on the dyed hair, a highly transparent coating can be formed on the hair surface. This makes the color and luster of the hair more beautiful and gives the hair a smooth texture. EXAMPLES

[0053] The present invention will be described in more detail below with reference to examples, although the present invention is not limited to the following examples.

[0054] <Examples 1 to 3, 5 ,7 ~10, Reference example 1 ~2 and Comparative Examples 1 to 3> Examples 1 to 3, 5 are based on a basic composition consisting of steartrimonium chloride and cetearyl alcohol, and contain meadowfoam-δ-lactone as component (A) and diisopropyl adipate, isodecyl pivalate, diethyl sebacate, diisopropyl sebacate, or bisethoxydiglycol cyclohexane-1,4-dicarboxylate as component (B) in the amounts shown in Tables 1 to 3 below. ,7 ~10, Reference example 1 ~2 and hair treatment agents according to Comparative Examples 1 to 3 were prepared. Note that meadowfoam-δ-lactone refers to a compound in which n=2 and R=pentadecyl group in the above general formula (A). The balance in the prepared hair treatment agent is purified water. After preparing the hair treatment agent, the pH was adjusted using lactic acid or sodium lactate as a pH adjuster. The notations (A) and (B) in the "Component Name" column in the tables correspond to component (A) and component (B), respectively. All units in the tables are mass %. The notation "-" in the "Component" column in each table means that the component is not contained. In Table 3, "B / A" indicates the ratio of the content of component (B) to the content of component (A).

[0055] (Resistance to discoloration) A human hair bundle was dyed with an oxidative hair dye at about 25°C for 25 minutes, and then the oxidative hair dye was thoroughly washed off with running water. The hair bundle was drained after the treatment, and then a hair treatment agent was evenly applied to the hair bundle. The hair was washed with running water and then dried with a hair dryer. The hair bundle was treated with a hair iron set at 180°C about five times. After that, 10 panelists visually evaluated the "resistance to discoloration" of the color change of the hair bundle before and after the treatment with the hair iron. If 8 or more panelists rated the hair bundle as "almost no discoloration," the panelists were given the grade "◎," if 6 to 7 panelists rated it as "○," if 4 to 5 panelists rated it as "△," and if 3 or less panelists rated it as "×."

[0056] [Table 1]

[0057] [Table 2]

[0058] [Table 3]

[0059] Example 11 and Reference Example 3 , 4 > A human hair bundle was dyed with an oxidative hair dye at about 25°C for 25 minutes, and then the oxidative hair dye was thoroughly washed off. After draining the hair bundle, the first agent was applied evenly to the hair bundle. The hair bundle was then washed with a detergent containing an anionic surfactant. After washing, the hair bundle was thoroughly rinsed with running water and dried with a hair dryer. The color change of the hair bundle before and after washing was visually evaluated by 10 panelists for "resistance to fading due to washing immediately after dyeing." If 8 or more panelists rated the color as "almost no fading," the panelists were given the grade "◎," if 6 to 7 panelists rated it as "○," if 4 to 5 panelists rated it as "△," and if 3 or less panelists rated it as "×." The evaluation results are shown in Table 4.

[0060] Next, the second agent was applied evenly to the hair bundle. The hair bundle was washed with running water and then dried with a hair dryer. The hair bundle was treated with a hair iron set at 180°C about five times. After that, the color change of the hair bundle before and after the treatment with the hair iron was visually evaluated by 10 panelists for "resistance to discoloration before and after treatment with the hair iron". When 8 or more panelists evaluated that "there was almost no discoloration before and after treatment with the hair iron", it was marked as "◎", when 6 to 7 panelists evaluated it as "○", when 4 to 5 panelists evaluated it as "△", and when 3 or less panelists evaluated it as "×". The evaluation results are shown in Table 4.

[0061] [Table 4]

[0062] In each example, discoloration of hair was suppressed. By including components (A) and (B), an excellent effect of suppressing discoloration against heat could be obtained. As shown in Table 4, by treating hair with a first agent containing polyquaternium-22 after hair dyeing, discoloration due to washing immediately after hair dyeing was suppressed. Furthermore, by treating hair with a second agent containing components (A) and (B) after washing, an excellent effect of suppressing discoloration against heat could be obtained.

Claims

1. The composition contains the following components (A) and (B) and water: A hair treatment agent for inhibiting discoloration of dyed hair due to heat, having a pH of 3.0 or more and 6.5 or less. 【Chemistry 1】 [In formula (A), n is 1 or 2, and R is a linear or branched, saturated or unsaturated hydrocarbon group having 9 to 22 carbon atoms.] (B) a penetrating component containing a carboxylic acid ester having a molecular weight of 242 or less In addition to gamma-docosalactone, the ingredients include water, honey, PEG-20 sorbitan cocoate, amodimethicone, sodium lactate, propanediol, cyclopentasiloxane, sorbic acid, soybean sterol, squalane, malic acid, cholesterol, ceramide 1, ceramide 2, ceramide 3, ceramide 5, ceramide 62, (C12-14) pareth-12, and caprylic acid P. An out-bath treatment agent containing G, BG, (C12-14) Palace-3, ceteth-20, ethanol, lauryltrimonium chloride, PG, isopropanol, phosphoric acid, sodium hydroxide, quaternium-33, PEG-100 hydrogenated castor oil, dicocodimonium chloride, pentasodium pentetate, caramel, quaternium-18, steartrimonium chloride, ethylparaben, methylparaben, and behentrimonium chloride, and a mist-like solvent in which carbon dioxide gas is dissolved in the out-bath treatment agent, Except hair wax.

2. 2. The hair treatment agent according to claim 1, wherein the carboxylic acid ester comprises at least one selected from the group consisting of isodecyl pivalate and diisopropyl adipate.

3. The hair treatment agent according to claim 1 or 2, wherein the content of the component (A) is 0.005% by mass or more.

4. The hair treatment agent according to any one of claims 1 to 3, wherein the ratio of the content of component (B) to the content of component (A) is 0.001 to 2000 on a mass basis.

5. The hair treatment agent according to any one of claims 1 to 4, further comprising a collagen derivative.

6. A first agent containing polyquaternium-22; A second agent containing the following components (A) and (B) and water; Equipped with A hair treatment agent set, wherein the second agent has a pH of 3.0 or more and 6.5 or less. 【Chemistry 2】 [In formula (A), n is 1 or 2, and R is a linear or branched, saturated or unsaturated hydrocarbon group having 9 to 22 carbon atoms.] (B) a penetrating component containing a carboxylic acid ester having a molecular weight of 242 or less In addition to gamma-docosalactone, the ingredients include water, honey, PEG-20 sorbitan cocoate, amodimethicone, sodium lactate, propanediol, cyclopentasiloxane, sorbic acid, soybean sterol, squalane, malic acid, cholesterol, ceramide 1, ceramide 2, ceramide 3, ceramide 5, ceramide 62, (C12-14) pareth-12, and caprylic acid P. Excluding out-bath treatment agents containing G, BG, (C12-14) Pareth-3, Ceteth-20, Ethanol, Lauryltrimonium chloride, PG, Isopropanol, Phosphoric acid, Sodium hydroxide, Quaternium-33, PEG-100 Hydrogenated Castor Oil, Dicocodimonium chloride, Pentasodium pentetate, Caramel, Quaternium-18, Steartrimonium chloride, Ethylparaben, Methylparaben, Behentrimonium chloride, and mist-like solvents in which carbon dioxide has been dissolved in said out-bath treatment agents.

7. The method includes applying a hair treatment agent containing the following components (A) and (B) and water to hair, The hair treatment method for suppressing discoloration of dyed hair due to heat, wherein the hair treatment agent has a pH of 3.0 or more and 6.5 or less. 【Chemistry 3】 [In formula (A), n is 1 or 2, and R is a linear or branched, saturated or unsaturated hydrocarbon group having 9 to 22 carbon atoms.] (B) a penetrating component containing a carboxylic acid ester having a molecular weight of 242 or less However, the hair treatment agent contains, in addition to gamma-docosalactone, water, honey, PEG-20 sorbitan cocoate, amodimethicone, sodium lactate, propanediol, cyclohexyl stearate, and cyclohexyl stearate. Pentathione, sorbic acid, soybean sterol, squalane, malic acid, cholesterol, ceramide 1, ceramide 2, ceramide 3, ceramide 5, ceramide 62, (C12-14) pareth-12, caprylic acid propylene glycol, butylene glycol, (C12-14) pareth-3, ceteth-20, An out-bath treatment agent containing ethanol, lauryltrimonium chloride, PG, isopropanol, phosphoric acid, sodium hydroxide, quaternium-33, PEG-100 hydrogenated castor oil, dicocodimonium chloride, pentasodium pentetate, caramel, quaternium-18, steartrimonium chloride, ethylparaben, methylparaben, and behentrimonium chloride, and a mist-like solvent in which carbon dioxide gas is dissolved in the out-bath treatment agent, Except hair wax.

8. A method of treating hair comprising applying to hair a hair treatment agent comprising the following components (A) and (B) and water; and washing the hair after applying the hair treatment agent to the hair and before heating the hair, The hair treatment method for suppressing discoloration of dyed hair due to heat, wherein the hair treatment agent has a pH of 3.0 or more and 6.5 or less. 【Chemistry 4】 [In formula (A), n is 1 or 2, and R is a linear or branched, saturated or unsaturated hydrocarbon group having 9 to 22 carbon atoms.] (B) a penetrating component containing a carboxylic acid ester having a molecular weight of 242 or less However, the hair treatment agent contains, in addition to gamma-docosalactone, water, honey, PEG-20 sorbitan cocoate, amodimethicone, sodium lactate, propanediol, cyclopentasiloxane, sorbic acid, soybean sterol, squalane, malic acid, cholesterol, ceramide 1, ceramide 2, ceramide 3, ceramide 5, ceramide 62, (C12-14) pareth-12, PG caprylic acid, BG, (C12-14) pareth-3, ceteth-20, Excluding out-bath treatment agents containing ethanol, lauryltrimonium chloride, PG, isopropanol, phosphoric acid, sodium hydroxide, quaternium-33, PEG-100 hydrogenated castor oil, dicocodimonium chloride, pentasodium pentetate, caramel, quaternium-18, steartrimonium chloride, ethylparaben, methylparaben, and behentrimonium chloride, as well as mist-like solvents in which carbon dioxide has been dissolved in said out-bath treatment agents.

9. The hair treatment method according to claim 7 or 8, wherein the hair treatment agent contains, as the carboxylic acid ester, at least one selected from the group consisting of isodecyl pivalate and diisopropyl adipate.

10. The hair treatment method according to any one of claims 7 to 9, wherein the content of component (A) in the hair treatment agent is 0.005 mass% or more.

11. The hair treatment method according to any one of claims 7 to 10, wherein in the hair treatment agent, a ratio of the content of component (B) to the content of component (A) is 0.001 to 2000 on a mass basis.

12. The hair treatment method according to any one of claims 7 to 11, wherein the hair treatment agent further comprises a collagen derivative.

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