Hair dye first component composition

Abstract

The present invention provides a first hair dye composition that exhibits good foaming properties, uniformity of foaming after dispensing, and high-temperature stability. [Solution] The present invention provides an aerosol-type foamy hair dye first component composition for use, which is mixed with a second component hair dye composition containing an oxidizing agent at the time of use, wherein the first component hair dye composition contains a first component hair dye stock solution containing one or more selected from oxidizing dyes or alkaline agents, and a foaming agent, the viscosity of the first component hair dye stock solution being 30,000 mPa·s or less, the first component hair dye stock solution containing (A) one or more selected from carboxyvinyl polymer or acrylic acid / alkyl methacrylate copolymer, and (B) one or more selected from coconut oil fatty acid diethanolamide or lauric acid diethanolamide, the content of component (B) in the first component hair dye stock solution being 1 to 10% by mass, and the mass ratio of the first component hair dye stock solution to the foaming agent being (first component hair dye stock solution: foaming agent = 99:1 to 90:10).

Description

Technical Field

[0001] The present invention relates to an aerosol-type foamy first hair dye composition that is used by mixing with an oxidizing agent-containing second hair dye composition at the time of use, and which is excellent in foamability, uniformity of foam after discharge, and high-temperature stability.

Background Art

[0002] Oxidative hair dyes, bleaching agents and the like are generally known as hair dyes. Among hair dyes, two-component hair dyes are widely used by many people, which are used by mixing at the time of use a first hair dye composition containing one or more selected from oxidative dyes or alkaline agents, and a second hair dye composition containing an oxidizing agent. This two-component hair dye changes the color of hair by, for example, oxidizing the oxidative dye in the hair to develop color, and decomposing melanin pigment with the alkaline agent and oxidizing agent to lighten the hair.

[0003] As for the dosage form of two-component hair dyes, creamy and milky liquid dosage forms are widely prevalent. However, a certain level of skill is required to apply the creamy or milky liquid two-component hair dye uniformly and without unevenness to the entire hair. Therefore, foamy two-component hair dyes, which spread more easily than creamy and milky liquid dosage forms and are easy to apply uniformly and without unevenness to the entire hair, have come into use.

[0004] Foamy two-component hair dyes are roughly classified into an aerosol type in which liquefied petroleum gas such as LPG or isopentane is used as a foaming agent to discharge the product in foam form, a non-aerosol type in which the product is discharged in foam form from a foamer container, and a non-aerosol type in which foaming occurs spontaneously when the first hair dye composition and the second hair dye composition are mixed. Among these, the aerosol type allows the user to discharge and use only the desired amount of the first hair dye composition and the second hair dye composition from the aerosol container, so that the first hair dye composition and the second hair dye composition can be used without waste.

[0005] As an aerosol-type foamy two-part hair dye, for example, it is possible to use a system in which two aerosol containers, each containing a first hair dye composition (prepared by filling and mixing the first hair dye concentrate with liquefied petroleum gas that functions as a propellant and foaming agent) and a second hair dye composition (prepared by filling and mixing the second hair dye concentrate with liquefied petroleum gas that functions as a propellant and foaming agent), are connected together and simultaneously dispensed and mixed to produce a foamy hair dye composition.

[0006] Furthermore, an inner bag can be provided inside the aerosol container, and the first hair dye composition, which is a mixture of the first hair dye concentrate and a foaming agent, and the second hair dye composition, which is a mixture of the second hair dye concentrate and a foaming agent, are stored separately in the inner bag. In addition, a propellant is filled into the inner space of the aerosol container, excluding the inside of the inner bag, and the first and second hair dye compositions, which are dispensed by the propellant, are converted into a foamy hair dye composition by the foaming agent.

[0007] Patent Document 1 discloses a two-part aerosol-type foam hair dye in which, by using higher alcohols, a predetermined nonionic surfactant, oils and fats, and a foaming agent in predetermined amounts, the first hair dye concentrate and the foaming agent, and the second hair dye concentrate and the foaming agent, are uniformly mixed for a long period of time, resulting in good foaming properties when dispensed and smooth hair after application. [Prior art documents] [Patent Documents]

[0008] [Patent Document 1] Japanese Patent Publication No. 2021-155341 [Overview of the project] [Problems that the invention aims to solve]

[0009] However, in the case of aerosol containers that dispense a foamy hair dye component by filling them with the first component concentrate along with a propellant, while foaming is good, the first component concentrate and propellant are mixed together, often resulting in the hair dye component being stored in the aerosol container in a separated state. Therefore, it is often necessary to shake the aerosol container before use to make the first component concentrate uniform before dispensing. In this case, depending on the ingredients and storage conditions, the first component concentrate may not become uniform in the aerosol container even after shaking. If dispensed in this state, the first component concentrate may not become foamy, or even if it does, the size and appearance of the foam may not be uniform.

[0010] On the other hand, in aerosol containers where an inner bag is provided inside to house the first hair dye component, which is a mixture of the first hair dye component concentrate and a foaming agent, and where a propellant is filled into the inner space of the aerosol container excluding the inside of the inner bag, and the product is dispensed by the propellant and foamed by the foaming agent to form a foamy first hair dye component, the foaming properties of the first hair dye component were sometimes insufficient. Furthermore, the first hair dye component is contained in the inner bag inside the aerosol container with no excess space due to the pressure of the propellant. In this state where there is no excess space inside the inner bag inside the aerosol container, if the first hair dye component separates, it cannot be mixed even by shaking. Therefore, it was necessary to maintain a uniformly mixed state of the first hair dye component concentrate and the foaming agent until use. In particular, when stored under high temperature conditions of around 45°C, as observed in vehicles and warehouses, the first hair dye component could separate, indicating room for improvement in high-temperature stability.

[0011] Therefore, the object of the present invention is to provide a first hair dye composition that exhibits good foaming properties, uniform foam size and appearance after dispensing (hereinafter referred to as "uniformity of foaming after dispensing"), and high-temperature stability. [Means for solving the problem]

[0012] As a result of diligent research to solve the above problems, the present inventor has developed an aerosol-type foamy hair dye first component composition that is used by mixing it with a second component hair dye composition containing an oxidizing agent at the time of use, wherein the first component hair dye composition contains a first component hair dye stock solution containing one or more selected from oxidizing dyes or alkaline agents and a foaming agent. The viscosity of the first solution of the hair dye is 30,000 mPa·s or less. The first solution of the hair dye contains: (A) One or more selected from carboxyvinyl polymer or acrylic acid / alkyl methacrylate copolymer, (B) One or more selected from coconut oil fatty acid diethanolamide or lauric acid diethanolamide It contains, The content of component (B) in the first solution of the hair dye is 1 to 10% by mass. We have discovered that a hair dye first agent composition characterized by a mass ratio of the hair dye first agent concentrate to the foaming agent (hair dye first agent concentrate: foaming agent = 99:1 to 90:10) can be obtained that exhibits good foaming properties, uniformity of foaming after dispensing, and high-temperature stability, thus completing the present invention. [Effects of the Invention]

[0013] The present invention provides a first hair dye composition that exhibits good foaming properties, uniformity of foaming after dispensing, and high-temperature stability. [Modes for carrying out the invention]

[0014] The present invention will be described in detail below.

[0015] The present invention relates to an aerosol-type foamy hair dye first component composition used by mixing it with a second component hair dye composition containing an oxidizing agent at the time of use, wherein the first component hair dye composition contains a first component hair dye stock solution containing one or more selected from oxidizing dyes or alkaline agents and a foaming agent. The viscosity of the first solution of the hair dye is 30,000 mPa·s or less. The first solution of the hair dye contains: (A) One or more selected from carboxyvinyl polymers or acrylic acid-alkyl methacrylate copolymers, (B) One or more selected from coconut oil fatty acid diethanolamides or lauric acid diethanolamides is contained, the content of the component (B) in the stock solution of the first hair dye agent is 1 to 10% by mass, and the mass ratio of the stock solution of the first hair dye agent to the foaming agent is (stock solution of the first hair dye agent: foaming agent = 99:1 to 90:10), this is a first agent composition for hair dyes.

[0016] From the viewpoint of foamability, the viscosity of the stock solution of the first hair dye agent used in the present invention is 30,000 mPa·s or less at 20°C. From the viewpoints of foamability and high-temperature stability, the viscosity is preferably 6,000 to 30,000 mPa·s, more preferably 8,000 to 25,000 mPa·s, and even more preferably 8,000 to 18,000 mPa·s. If the viscosity of the stock solution of the first hair dye agent exceeds 30,000 mPa·s, the foamability will decrease. If the viscosity of the stock solution of the first hair dye agent is less than 6,000 mPa·s, the high-temperature stability may decrease.

[0017] The viscosity at 20°C of the stock solution of the first hair dye agent in the present invention is measured as follows: 130 g of the stock solution of the first hair dye agent prepared by a conventional method is filled into a sample bottle (Food 140: manufactured by Daiichi Glass Co., Ltd.), allowed to stand at 20°C for 48 hours, and then measured with a B-type viscometer (Model: Digital Viscometer TVB-10M, manufactured by Toki Sangyo Co., Ltd.) using an M4 rotor at 12 rpm for 1 minute of rotation.

[0018] From the viewpoint of the uniformity of foaming after discharge, the present invention contains (A) one or more selected from carboxyvinyl polymers or acrylic acid-alkyl methacrylate copolymers.

[0019] The content of the component (A) used in the present invention in the stock solution of the first hair dye agent is preferably 0.12 to 2.4% by mass, more preferably 0.2 to 1.35% by mass.

[0020] From the viewpoint of foam uniformity after discharge, the present invention contains (B) one or more selected from coconut oil fatty acid diethanolamide and lauric acid diethanolamide.

[0021] The content of the component (B) used in the present invention is 1 to 10% by mass, preferably 3 to 9% by mass, in the stock solution of the first hair dye agent, from the viewpoints of foam uniformity after discharge and high-temperature stability. When the content of the component (B) is less than 1% by mass, the foam uniformity after discharge decreases. When the content of the component (B) exceeds 10% by mass, the high-temperature stability decreases.

[0022] The present invention contains a foaming agent from the viewpoint of foamability.

[0023] The mass ratio of the stock solution of the first hair dye agent to the foaming agent (stock solution of the first hair dye agent: foaming agent) used in the present invention is 99:1 to 90:10, preferably 98:2 to 90:10, more preferably 97:3 to 91:9, from the viewpoints of foamability and high-temperature stability. When the mass ratio of the stock solution of the first hair dye agent to the foaming agent (stock solution of the first hair dye agent: foaming agent) is outside the range of 99:1 to 90:10, the foamability or high-temperature stability decreases.

[0024] As the foaming agent used in the present invention, for example, isopentane, isobutane, n-pentane, n-butane, propane, trichlorotrifluoroethane, dichlorotetrafluoroethane and the like can be used. The foaming agent may contain one or more types.

[0025] From the viewpoint of improving foamability, the foaming agent used in the present invention is preferably one or more selected from isopentane, isobutane, n-pentane and n-butane, more preferably one or more selected from isopentane and isobutane.

[0026] The first hair dye agent composition of the present invention contains one or more selected from oxidation dyes and alkali agents.

[0027] The oxidation dyes used in the present invention include, for example, paraphenylenediamine, toluene 2,5-diamine, orthoaminophenol, paraaminophenol, metaaminophenol, 5-amino-orthocresol, 5-(2-hydroxyethylamino)-2-methylphenol, 2,6-diaminopyridine, 2,4-diaminophenoxyethanol, 2,2'-[(4-aminophenyl)imino]bisethanol, 1-naphthol, resorcinol, and their salts. Other dyes listed in the "Standards for Ingredients of Quasi-Drugs 2021 [Revised March 2023]" (published December 2023, Yakuji Nippo Co., Ltd.) can also be used. The oxidation dyes may contain one or more types.

[0028] The alkaline agent used in the present invention can be, for example, monoethanolamine, diethanolamine, triethanolamine, morpholine, guanidine, ammonia, ammonium carbonate, ammonium bicarbonate, potassium carbonate, potassium bicarbonate, sodium carbonate, sodium bicarbonate, potassium hydroxide, sodium hydroxide, arginine, lysine, histidine, etc. The alkaline agent is preferably monoethanolamine, ammonia, ammonium carbonate, ammonium bicarbonate, potassium carbonate, potassium hydroxide, or arginine. The alkaline agent may contain one or more of these.

[0029] The first hair dye composition of the present invention may optionally contain, to the extent that it does not impair the effects of the present invention, various components such as antioxidants such as sulfites, ascorbic acid, ascorbates, dibutylhydroxytoluene, cysteine, and cysteine ​​salts; chelating agents such as edetates; preservatives such as phenoxyethanol and methyl parahydroxybenzoate; water; anionic surfactants; amphoteric surfactants; cationic surfactants; nonionic surfactants other than those in component (B); higher alcohols; hydrocarbons other than those in the foaming agent; oils and fats; waxes; higher fatty acids; esters; ethers; silicones; ultraviolet absorbers; polyhydric alcohols; lower alcohols; water-soluble thickeners other than those in component (A); sugars; amino acids; plant extracts; proteins such as collagen, keratin, elastin, fibroin, conchiolin, soy protein, casein, and gelatin; hydrolysates obtained by hydrolysis with acids, alkalis, enzymes, etc., and quaternarily modified cation-modified proteins thereof; direct dyes; pigments; acids; fragrances; vitamins, etc. Each of the above components may contain one or more types.

[0030] The pH of the first hair dye solution in this invention is preferably 9 to 12 under conditions of 20°C.

[0031] The pH of the first hair dye solution under 20°C conditions in this invention is obtained by filling 130g of the first hair dye solution, prepared by a conventional method, into a sample bottle (Food 140: manufactured by Daiichi Glass Co., Ltd.), leaving it for 24 hours under 20°C conditions, and then measuring the pH of the solution using a glass electrode type hydrogen ion concentration indicator (F-71, manufactured by Horiba, Ltd.).

[0032] The hair dye second composition of the present invention, which is used by mixing it with the first hair dye composition at the time of use, contains an oxidizing agent.

[0033] The oxidizing agent used in the second hair dye composition, which is mixed with the first hair dye composition of the present invention at the time of use, can be, for example, hydrogen peroxide, sodium percarbonate, sodium bromate, etc. Hydrogen peroxide is preferred as the oxidizing agent. One or more types of oxidizing agents may be included.

[0034] The hair dye second composition, which is used by mixing it with the first hair dye composition of the present invention at the time of use, contains, as necessary, various components, such as acids such as citric acid, phosphoric acid, and phosphates; inorganic alkalis such as potassium carbonate, potassium bicarbonate, sodium carbonate, sodium bicarbonate, potassium hydroxide, and sodium hydroxide; chelating agents such as hydroxyethanediphosphonic acid and hydroxyethanediphosphonates; preservatives such as phenoxyethanol and methyl parahydroxybenzoate; water; anionic surfactants; amphoteric surfactants; cationic surfactants; and nonionic surfactants. Surfactants, higher alcohols, hydrocarbons, oils and fats, waxes, higher fatty acids, esters, ethers, silicones, UV absorbers, polyhydric alcohols, lower alcohols, water-soluble thickeners, sugars, amino acids, plant extracts, proteins such as collagen, keratin, elastin, fibroin, conchiolin, soy protein, casein, and gelatin, hydrolysates obtained by hydrolysis with acids, alkalis, enzymes, etc., and quaternarily modified cation-modified proteins, etc., direct dyes, pigments, fragrances, vitamins, etc., can be used. One or more of the above components may be included.

[0035] The first hair dye composition of the present invention can be used by filling it into, for example, a double-walled container equipped with a mechanism that separates the first hair dye composition filling space and the second hair dye composition filling space within a compressed gas-filled space filled with a pressurizing propellant, and that simultaneously discharges the first and second hair dye compositions, respectively, into these filling spaces by separating them using the propellant.

[0036] The double-walled container used in the present invention can be, for example, the double-walled container described in Japanese Patent Application Publication No. 2013-220818.

[0037] The propellant used in the present invention can be, for example, nitrogen, LPG, dimethyl ether, alternative fluorocarbons, compressed air, etc. Nitrogen is preferred as the propellant.

[0038] From the viewpoint of usability, the amount of propellant used in the present invention is preferably such that the internal pressure at 35°C is 0.2 to 1 MPa, and more preferably such that it is 0.3 to 0.8 MPa.

[0039] The container constituting the compressed gas-filled space used in the present invention can be, for example, a pressure-resistant container made of aluminum, aluminum alloy, tinplate, polyethylene terephthalate, polyacrylate, polypropylene, nylon, or the like.

[0040] The containers constituting the space for filling the first hair dye composition and the space for filling the second hair dye composition used in the present invention can be, for example, a pouch container made by bonding the edges of two multilayered sheet materials together, or a pouch container made by folding a single multilayered sheet material and bonding the edges of the pair of folded pieces together. The containers constituting the space for filling the first hair dye composition and the containers constituting the space for filling the second hair dye composition may also be fitted with joint materials for connecting to a dispensing mechanism. The containers constituting the space for filling the first hair dye composition and the containers constituting the space for filling the second hair dye composition may not be the same.

[0041] The multilayer sheet material used in the present invention may be, for example, a multilayer sheet material in which the innermost layer is a polyolefin layer, the middle layer contains a metal layer, and the outermost layer is a polyester layer. From the viewpoint of the stability of the oxidation dye, alkaline agent and oxidizing agent, the multilayer sheet material is preferably one in which the innermost layer is a polyethylene layer, the middle layer contains an aluminum layer, and the outermost layer is a polyethylene terephthalate layer. The multilayer sheet material may also be one in which an adhesive or the like is applied between each layer to bond them together. The multilayer sheet material used in the container that constitutes the space for filling the first hair dye composition and the multilayer sheet material used in the container that constitutes the space for filling the second hair dye composition may not be the same.

[0042] The thickness of each layer of the multilayer sheet material used in the present invention may be, for example, 20 to 200 μm for the innermost layer, 5 to 15 μm for the intermediate metal layer, 0 to 25 μm for the intermediate layers other than the metal layer, and 10 to 25 μm for the outermost layer. The thickness of each layer of the multilayer sheet material used in the container constituting the space for filling the first hair dye composition may not be the same as the thickness of each layer of the multilayer sheet material used in the container constituting the space for filling the second hair dye composition.

[0043] The thickness of the multilayer sheet material used in the present invention can be, for example, 35 to 265 μm. The thickness of the multilayer sheet material is the sum of the thickness of each layer, the adhesive, etc. The thickness of the multilayer sheet material used in the container that constitutes the space for filling the first hair dye composition and the thickness of the multilayer sheet material used in the container that constitutes the space for filling the second hair dye composition may not be the same.

[0044] The bending rigidity of the multilayer sheet material used in the present invention is preferably 0.15 to 3.0 gf·cm² / cm from the viewpoint of reducing residual amount. The bending rigidity of the multilayer sheet material used in the container constituting the space for filling the first hair dye composition and the bending rigidity of the multilayer sheet material used in the container constituting the space for filling the second hair dye composition may not be the same.

[0045] The hysteresis of the multilayer sheet material used in the present invention is preferably 1.5 gf·cm / cm or less, from the viewpoint of reducing residual amount. The hysteresis of the multilayer sheet material used in the container constituting the space for filling the first hair dye composition and the hysteresis of the multilayer sheet material used in the container constituting the space for filling the second hair dye composition may not be the same.

[0046] In this invention, reducing the amount of residual product means, for example, reducing the amount of the first hair dye component and the second hair dye component that remain in the filling space because they cannot be dispensed from the double-walled container.

[0047] The bending stiffness and hysteresis of the multilayer sheet material used in the present invention can be measured, for example, using a bending test machine (KES-FB2-S (manufactured by Kato Tech Co., Ltd.)).

[0048] The multilayer sheet material used in the present invention may be, for example, a multilayer sheet material in which the innermost layer / intermediate layer / outermost layer consists of 60 μm polyethylene / 15 μm nylon / 9 μm aluminum / 12 μm polyethylene terephthalate, with each layer bonded together with an adhesive, the sheet material having a thickness of 107 μm, a bending stiffness of 1.13 gf·cm² / cm, and a hysteresis of 0.92 gf·cm / cm; or a multilayer sheet material in which the innermost layer / intermediate layer / outermost layer consists of 60 μm polyethylene / 12 μm polyethylene terephthalate / 9 μm aluminum / 12 μm polyethylene terephthalate, with each layer bonded together with an adhesive, the sheet material having a thickness of 104 μm, a bending stiffness of 1.10 gf·cm² / cm, and a hysteresis of 0.81 gf·cm / cm.

[0049] The dispensing mechanism provided in the double-walled container used in the present invention can be, for example, the dispensing mechanism described in International Publication No. 2011 / 067868. [Examples]

[0050] The present invention will be described in more detail below with reference to examples, but these examples are not intended to limit the present invention in any way.

[0051] In the evaluation tests described herein, the components and their content in the first hair dye composition were varied during the tests. All units indicating the content of each component are in mass%, and these were prepared by conventional methods.

[0052] The double-walled container used in the evaluation tests for "foaming properties" and "uniformity of foaming after dispensing" described herein is a double-walled container that has two sets of aerosol valves, and in which a pouch container constituting the space for filling the first hair dye composition and a pouch container constituting the space for filling the second hair dye composition are housed in an aluminum container constituting a compressed gas-filled space, and nitrogen is filled as a propellant so that the internal pressure at 35°C is 0.7 MPa.

[0053] The pouch container used in the evaluation tests for "foaming properties" and "uniformity of foaming after dispensing" described herein is a bag-shaped pouch container made by bonding the edges of two multilayer sheet materials together and attaching a joint material for connecting to a dispensing mechanism. The multilayer sheet material consists of 60 μm polyethylene / 15 μm nylon / 9 μm aluminum / 12 μm polyethylene terephthalate in the order of innermost layer / middle layer / outermost layer, with each layer bonded together with adhesive, a sheet material thickness of 107 μm, a bending rigidity of 1.13 gf·cm² / cm, and a hysteresis of 0.92 gf·cm / cm.

[0054] The pouch container used in the evaluation tests for "foaming properties" and "uniformity of foaming after dispensing" described herein is a bag-shaped pouch container made by bonding the edges of two multilayer sheet materials together and attaching a joint material for connecting to a dispensing mechanism. The multilayer sheet material consists of 60 μm polyethylene / 12 μm polyethylene terephthalate / 9 μm aluminum / 12 μm polyethylene terephthalate in the order of innermost layer / middle layer / outermost layer, with each layer bonded together with adhesive, and the sheet material thickness is 104 μm, the bending rigidity of the sheet material is 1.10 gf·cm² / cm, and the hysteresis of the sheet material is 0.81 gf·cm / cm.

[0055] The viscosity of the first hair dye solution for Examples 1 to 24, Comparative Examples 1 to 8, and Examples 25 to 27, as shown in Tables 1 to 3, is the value measured by the method described in paragraph 0016.

[0056] In the evaluation tests described herein, "foaming properties," "uniformity of foaming after dispensing," and "high-temperature stability" were evaluated using the following methods.

[0057] "Effervescent" In the evaluation test for "foaming properties" described herein, 56 g of the first hair dye composition of the examples and comparative examples described herein was filled into a pouch container constituting the space for filling the first hair dye composition within a double-walled container, and 44 g of the second hair dye composition of Reference Example 1, described later in this specification, was filled into a pouch container constituting the space for filling the second hair dye composition within a double-walled container. Under conditions of 25°C, the first and second hair dye compositions were simultaneously dispensed from the double-walled container, and the entire amount of only the first hair dye composition was dispensed into a 1000 mL beaker (IWAKI 1000BK1000; manufactured by AGC Technoglass Co., Ltd.). After 5 minutes of dispensing, one expert panelist visually evaluated the state of the first hair dye composition according to the evaluation criteria below.

[0058] Evaluation criteria for "foaming properties" AAA: Showed excellent foaming properties. AA: Exhibited excellent foaming properties. A: Showed good effervescence. B: Showed weak effervescence. C: Does not show foaming

[0059] "Uniformity of foaming after dispensing" In the evaluation test for "uniformity of foaming after dispensing" as described herein, 56 g of the first hair dye composition of the examples and comparative examples described herein was filled into pouch containers constituting the space for filling the first hair dye composition within a double-walled container, and 44 g of the second hair dye composition of Reference Example 1, described later in this specification, was filled into pouch containers constituting the space for filling the second hair dye composition within a double-walled container. The first and second hair dye compositions were simultaneously dispensed from the double-walled container at a temperature of 25°C, and 10 g of only the first hair dye composition was dispensed into five 500 mL beakers (IWAKI 1000BK500; manufactured by AGC Technoglass Co., Ltd.). After 5 minutes, the state of the first hair dye composition dispensed into each beaker was visually evaluated by one expert panelist according to the evaluation criteria below.

[0060] Evaluation criteria for "uniformity of foaming after dispensing" AA: The first component of the hair dye in the beaker foams very uniformly, and the size and appearance of the bubbles are very uniform. A: The first component of the hair dye in the beaker foams almost uniformly, and the size and appearance of the bubbles are almost uniform. B: The first component of the hair dye in the beaker does not foam uniformly, and the size and appearance of the bubbles are not uniform.

[0061] "High temperature stability" In the evaluation test for "high temperature stability" described herein, 50 g of the first hair dye composition was filled into a 100 mL aerosol test bottle (manufactured by Tokyo Polymer Co., Ltd.), and nitrogen gas was filled to achieve an internal pressure of 0.7 MPa at 35°C. This test was then stored at 45°C for one month. After one month of storage at 45°C, the condition of the first hair dye composition was visually evaluated by one expert panelist according to the evaluation criteria.

[0062] Evaluation criteria for "high temperature stability" AA: Separation was not confirmed. A: A very slight separation was observed, but it's not a problem. B: Clear separation was confirmed.

[0063] [Table 1] *1: Carbopol Ultrez 10 Polymer (manufactured by Lubrizol) *2: Carbopol ETD 2050 Polymer (manufactured by Lubrizol) *3: Carbopol ETD 2020 Polymer (manufactured by Lubrizol)

[0064] [Table 2]

[0065] [Table 3]

[0066] Examples 1 to 24, shown in Tables 1 to 3, confirmed that good results were obtained regarding foaming properties, uniformity of foaming after dispensing, and high-temperature stability.

[0067] When various tests were conducted using Examples 25, 26, and 27, it was confirmed that good results were obtained regarding foaming properties, uniformity of foaming after dispensing, and high-temperature stability.

[0068] Example 25 <Hair dye component 1 composition> Hair dye solution (1): Foaming agent (1) = 95:5 (mass ratio)

[0069] <Hair dye solution, first component (1)> Component Content (mass%) (A) Carboxyvinyl polymer*1 1.00 (B) Coconut oil fatty acid diethanolamide 6.00 Resorcinol 0.10 Meta-aminophenol 0.06 5-amino-o-cresol 0.15 2,4-Diaminophenoxyethanol hydrochloride 0.03 Toluene-2,5-diamine 0.17 Monoethanolamine 8.00 Ammonia 1.00 L-ascorbic acid 0.50 Sodium sulfite 0.50 Tetrasodium EDTA tetrahydrate 0.20 Polyoxyethylene lauryl ether (5E.O.) 1.00 Polyoxyethylene cetyl ether (15 E.O.) 1.00 Polyoxyethylene cetyl ether (40 E.O.) 1.00 Methylpolysiloxane 1.00 Liquid paraffin 1.00 Dimethyldiallylammonium chloride / acrylamide copolymer 0.26 Fragrance 0.90 Purified water 76.13 Total 100.00 Viscosity (20℃) 9,500mPa·s pH (20℃) 10.9

[0070] <Foaming agent (1)> Component Content (mass%) Isopentane 75.00 Isobutane 25.00 Total 100.00

[0071] Example 26 <Hair dye component 1 composition> Hair dye solution (2): Foaming agent (2) = 93:7 (mass ratio)

[0072] <Hair dye solution, first agent (2)> Component Content (mass%) (A) Acrylic acid / alkyl methacrylate copolymer *3 0.60 (B) Coconut oil fatty acid diethanolamide 8.00 Para-aminophenol 0.50 Resorcinol 1.00 Meta-aminophenol 0.40 5-amino-o-cresol 0.10 2,4-Diaminophenoxyethanol hydrochloride 0.05 Toluene-2,5-diamine 2.36 Monoethanolamine 6.40 L-ascorbic acid 1.50 Sodium sulfite 0.20 Tetrasodium EDTA tetrahydrate 0.20 Dimethyldiallylammonium chloride / acrylamide copolymer 0.26 Potassium laurate 0.37 Potassium myristate 0.25 Potassium palmitate 0.19 Glycerin 0.06 Purified water 77.56 Total 100.00 Viscosity (20℃) 10,700mPa·s pH (20℃) 10.4

[0073] <Foaming agent (2)> Component Content (mass%) Isopentane 75.00 Isobutane 25.00 Total 100.00

[0074] Example 27 <Hair dye component 1 composition> Hair dye solution (3): Foaming agent (3) = 95:5 (mass ratio)

[0075] <Hair dye solution, first agent concentrate (3)> Component Content (mass%) (A) Acrylic acid / alkyl methacrylate copolymer *3 0.60 (B) Coconut oil fatty acid diethanolamide 3.00 Xanthan gum 0.10 Monoethanolamine 5.60 Ammonia 1.00 Ammonium bicarbonate 3.00 Stearyl alcohol 1.00 Polyoxyethylene cetyl ether (15 E.O.) 1.00 Polyoxyethylene cetyl ether (40 E.O.) 1.00 Methylpolysiloxane 1.00 Tetrasodium EDTA tetrahydrate 0.50 Dimethyldiallylammonium chloride / acrylamide copolymer 0.50 Potassium laurate 0.90 Potassium myristate 0.60 Potassium palmitate 0.45 Glycerin 5.00 Purified water 74.75 Total 100.00 Viscosity (20℃) 17,700mPa·s pH (20℃) 11.1

[0076] <Foaming agent (3)> Component Content (mass%) Isopentane 75.00 Isobutane 25.00 Total 100.00

[0077] The present invention allows for the production of a two-part hair dye by mixing a second hair dye composition containing an oxidizing agent with the hair dye composition immediately before use. Furthermore, by mixing a second hair dye composition containing a foaming agent immediately before use, an aerosol-type foamy two-part hair dye can be produced. For example, the second hair dye composition shown in Reference Example 1 below can be used.

[0078] Reference example 1 <Hair dye second component composition> Hair dye solution (1): Foaming agent (4) = 95:5 (mass ratio)

[0079] <Hair dye solution, second component (1)> Component Content (mass%) Stearyl alcohol 8.35 Liquid paraffin 9.50 Polyoxyethylene behenyl ether (5E.O.) 1.80 Polyoxyethylene behenyl ether (10 E.O.) 1.50 Polyoxyethylene behenyl ether (20 E.O.) 1.35 Polyoxyethylene behenyl ether (30 E.O.) 3.05 Hydroxyethanediphosphonic acid 0.20 Phenoxyethanol 0.04 Diethylene glycol monoethyl ether 0.02 Potassium hydroxide 0.05 Hydrogen peroxide 5.80 Purified water 68.34 Total 100.00 Viscosity (20℃) 18,000mPa·s pH (20℃) 2.66

[0080] <Foaming agent (4)> Component Content (mass%) Isopentane 75.00 Isobutane 25.00 Total 100.00

[0081] By mixing Examples 1 to 27 and Reference Example 1 at the time of use, an aerosol-type foamy two-part hair dye can be obtained. [Industrial applicability]

[0082] The present invention provides a first hair dye composition that exhibits good foaming properties, uniformity of foaming after dispensing, and high-temperature stability.

Claims

1. An aerosol-type foamy hair dye first component composition is used by mixing it with a second component hair dye composition containing an oxidizing agent at the time of use, wherein the first component hair dye composition contains a first component hair dye stock solution containing one or more selected from oxidizing dyes or alkaline agents, and a foaming agent. The viscosity of the first solution of the hair dye is 30,000 mPa·s or less. The first solution of the hair dye contains: (A) One or more selected from carboxyvinyl polymer or acrylic acid / alkyl methacrylate copolymer, (B) One or more selected from coconut oil fatty acid diethanolamide or lauric acid diethanolamide It contains, The content of component (B) in the first hair dye solution is 1 to 10% by mass. A hair dye first agent composition characterized in that the mass ratio of the hair dye first agent concentrate to the foaming agent is (hair dye first agent concentrate: foaming agent = 99:1 to 90:10).

2. The first hair dye composition according to claim 1, characterized in that the foaming agent contains one or more selected from isopentane, isobutane, n-pentane, or n-butane.

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