JP5875257B2 - Method for producing oxidative hair dye - Google Patents

Description

  The present invention relates to an oxidative hair dye obtained by mixing a first agent containing an oxidative dye and a second agent containing an oxidant before the hair dyeing treatment.

  Examples of coloring agents used for coloring hair include an oxidative hair dye containing an oxidative dye and an acid hair dye containing an acidic dye. The oxidative hair dye is based on a hair coloring principle different from an acidic hair dye in which an oxidative dye permeated into hair is dyed by oxidative polymerization, and realizes long-lasting color retention of hair. When using an oxidation hair dye, the viscosity according to the usage method may be calculated | required. For example, Patent Document 1 discloses that a carboxyvinyl polymer is used for excellent operability such as mixing of the first agent and the second agent for obtaining an oxidative hair dye and application of the oxidative hair dye to hair. There is also a proposal of a hair dye composition containing an acrylic acid / alkyl methacrylate copolymer and a copolymer of acrylic acid amide and 2-acrylamido-2-methylpropanesulfonic acid.

JP 2001-328927 A

  By the way, while the operability at the time of using an oxidation hair dye may be calculated | required, there exists a request | requirement with respect to the dyed hair after the use, and the request | requirement with respect to the hair dyeing process. That is, there are demands such as the gloss of the dyed hair, the dyeability to the hair, the bundling of hair ends, and the reduction of squeaking when the oxidative hair dye is washed away from the hair.

  In view of the above circumstances, an object of the present invention is to provide an oxidative hair dye that can at least improve the gloss of dyed hair.

  As a result of intensive studies by the present inventors in order to improve the gloss of hair after using an oxidative hair dye, the hair shine can be obtained by adding polyacrylic acid amide and carboxyvinyl polymer to the oxidative hair dye. Has been found to improve, and the present invention has been completed.

  That is, the oxidative hair dye according to the present invention is obtained by mixing the first agent containing the oxidative dye and the second agent containing the oxidant, and includes polyacrylamide and carboxyvinyl polymer. It is characterized by being blended. If this oxidative hair dye is used, at least the gloss of the dyed hair can be improved, and in addition, the dyeability to the hair and the unity of the hair tips are also improved.

  The oxidative hair dye according to the present invention preferably contains a cationic polymer. If cationic polymer is blended, polyacrylamide and carboxyvinyl polymer are blended, so the gloss of the hair is good and the unity to the hair ends is improved, and the oxidative hair dye is washed away from the hair. Squeaking can be reduced.

  The oxidative hair dye according to the present invention preferably has a polyacrylic acid amide blending concentration higher than that of an anionic polymer other than the carboxyvinyl polymer, and the anionic polymer other than the carboxyvinyl polymer. Is preferably 0.5% by mass or less, more preferably not containing the anionic polymer. When carboxyvinyl polymer is blended, it is more advantageous to blend polyacrylamide than anionic polymers other than carboxyvinyl polymer with respect to the gloss of the dyed hair. It is preferable to increase the concentration. In addition, with respect to the gloss of the dyed hair, anionic polymers other than carboxyvinyl polymer may be inferior to polyacrylic amide in terms of improving the gloss or may reduce the gloss. In the oxidative hair dye, the blending concentration of the anionic polymer other than the carboxyvinyl polymer is preferably 0.5% by mass or less, and it is more preferable that the anionic polymer is not blended.

  According to the oxidation hair dye which concerns on this invention, since both raw materials of polyacrylic acid amide and a carboxy vinyl polymer are mix | blended, the glossiness of the hair after dyeing becomes favorable.

Based on the oxidative hair dye which concerns on this embodiment, this invention is demonstrated below.
(Oxidative hair dye)
The oxidative hair dye according to this embodiment is obtained by mixing the first agent and the second agent in the same manner as the known oxidative hair dye, and is blended with polyacrylic acid amide and carboxyvinyl polymer. (A typical example of the oxidative hair dye of this embodiment has a water content of 70% by mass or more). If it is an oxidative hair dye blended with these polyacrylic acid amides and carboxyvinyl polymers, the gloss of the hair after use will be good, and the dyeability of the hair after use and the unity to the hair tip will also be good. Become. Moreover, the oxidative hair dye which concerns on this embodiment has a suitable cationic polymer mix | blended.

  In addition, it is as above-mentioned that the oxidative hair dye of this embodiment is obtained by mixing the 1st agent and the 2nd agent, and before the mixing, the 1st agent and / or the 2nd agent Are blended with polyacrylamide, carboxyvinyl polymer, or cationic polymer.

Polyacrylic amide is a polymer of acrylic acid amide. The polyacrylic amide blended in the oxidative hair dye is distributed by SNF's “Flocare T 290 GC” and the like. In addition, as polyacrylic acid amide blended with other raw materials, “Egel305” of Essential Ingredients Co., Ltd. blended with polyacrylic acid amide, isoparaffin, and polyoxyethylene lauryl ether (7EO) is distributed. Yes.

  The blending concentration of polyacrylic acid amide in the oxidative hair dye of this embodiment is, for example, 0.02% by mass or more and 1.5% by mass or less, preferably 0.05% by mass or more and 1.0% by mass or less. 1 mass% or more and 0.8 mass% or less are preferable. When the amount is less than 0.02% by mass, the gloss of the hair may not be sufficient. When the amount exceeds 1.5% by mass, the viscosity of the oxidative hair dye becomes too high, making it difficult to apply to the hair. There is.

  The carboxyvinyl polymer is a copolymer of acrylic acid crosslinked with pentaerythryl allyl ether, sucrose allyl ether, propylene allyl ether or the like. As for carboxyvinyl polymer, Lubrizol's “Carbopol Ultrez 10 Polymer”, “Carbopol 934 Polymer”, “Carbopol 940 Polymer”, “Carbopol 941 Polymer”, “Carbopol 980 Polymer”, “Carbopol 981 Polymer” etc. are distributed as commercial products. doing.

  The blending concentration of the carboxyvinyl polymer in the oxidative hair dye of this embodiment is, for example, 0.01% by mass or more and 1.0% by mass or less, preferably 0.03% by mass or more and 0.5% by mass or less. 05 mass% or more and 0.4 mass% or less are preferable. When the amount is less than 0.01% by mass, the gloss of the hair may not be sufficient. When the amount exceeds 1.0% by mass, the viscosity of the oxidative hair dye becomes too high, making it difficult to apply to the hair. There is.

  The oxidative hair dye of the present embodiment is preferably blended with a cationic polymer having a quaternary ammonium group. By further blending the cationic polymer, the unity to the hair ends after use is improved, and the squeakage when the oxidative hair dye is washed away from the hair is reduced.

  Examples of the cationic polymer include known cationic polymers such as O- [2-hydroxy-3- (trimethylammonio) propyl] hydroxyethylcellulose (polyquaternium-10), hydroxyethylcellulose dimethyldiallylammonium chloride (polyquaternium- 4) O- [2-hydroxy-3- (trimethylammonio) propyl] guar gum, vinylpyrrolidone / N, N-dimethylaminoethylmethacrylic acid copolymer diethyl sulfate (polyquaternium-11), N, N- Dimethylaminoethyl diethyl methacrylate sulfate, N, N-dimethylacrylamide, polyethylene glycol dimethacrylate (polyquaternium-52), dimethyldiallylammonium chloride / acrylamide copolymer (polyquater Bromide -7), and the like. Among these exemplified, O- [2-hydroxy-3- (trimethylammonio) propyl] hydroxyethylcellulose (polyquaternium-10) is inexpensive and preferable, and polyquaternium-10 having a nitrogen content of 1.0 to 2.5% is used. It is good to choose. For example, if it is distributed as polyquaternium-10 having a nitrogen content of 1.0 to 2.5%, Leogard GP and MGP manufactured by Lion Corporation; Polymers JR-400 and JR-30M manufactured by Union Carbide Corporation; It is.

  The blending concentration of the cationic polymer in the oxidative hair dye of this embodiment is, for example, 0.01% by mass or more and 1.0% by mass or less, and preferably 0.1% by mass or more and 0.8% by mass or less. When the amount is less than 0.01% by mass, there is a case where the amount of squeezing at the hair ends and the squeeze reduction at the time of washing is insufficient, and even if the blending amount exceeds 1.0% by mass, 1.0% by mass or less Compared to the above, there is not much difference between the uniting up to the tip of the hair and the reduction in squeaking when washing.

  Although the oxidative hair dye of this embodiment may be blended with an anionic polymer other than the carboxyvinyl polymer, the one without the anionic polymer is optimal.

  When an anionic polymer other than the carboxyvinyl polymer is blended in the oxidative hair dye of this embodiment, the blending concentration of the polyacrylic amide is higher than the blending concentration of the anionic polymer other than the carboxyvinyl polymer. And good. In this case, the blending concentration of the anionic polymer other than the carboxyvinyl polymer in the oxidative hair dye of this embodiment is preferably 0.5% by mass or less, preferably 0.3% by mass or less, and 0.1% by mass or less. Is more preferable.

  Examples of known anionic polymers other than the carboxyvinyl polymer include those obtained by a polymerization reaction using acrylic acid, vinyl acetate, or the like. Examples of the anionic polymer include alkyl acrylate copolymers (in terms of cosmetic labels, alkyl acrylate copolymer Na, alkyl acrylate copolymer ammonium, etc.), alkyl acrylate / vinyl acetate copolymers, acrylic acid, and the like. -An acrylamide-ethyl acrylate copolymer is mentioned.

  The compounding density | concentration of the oxidation dye in the oxidation hair dye of this embodiment is 0.03 mass% or more and 5 mass% or less, for example.

  The compounding concentration of the oxidizing agent in the oxidative hair dye of this embodiment is, for example, 0.2% by mass or more and 4% by mass or less.

  The mixing ratio of the first agent and the second agent for obtaining the oxidative hair dye of the present embodiment is, for example, the mass of the first agent: the mass of the second agent = 1: 0.5-2.

  The dosage form at the time of use of the oxidative hair dye which concerns on this embodiment is not specifically limited, For example, liquid form, cream form, wax form, gel form, foam form (foam form) is mentioned. The viscosity of the oxidative hair dye of the present embodiment is creamy in consideration of handling properties such as application to hair and dripping.

  The pH of the oxidative hair dye of this embodiment is, for example, 8.0 to 12.0, and is 9.0 to 11.0 in order to reduce good dyeability and irritation to the scalp. 5 to 10.5 is good.

(First agent)
The first agent for obtaining the oxidative hair dye of the present embodiment is one in which an oxidative dye is blended (typical as the first agent of the present embodiment, the blending amount of water is 70% by mass or more. belongs to.). In the first agent, when not all of the polyacrylic acid amide, the carboxyvinyl polymer, and the cationic polymer are blended in the second agent of the present embodiment, all of them are blended. When any one of polyacrylic acid amide, carboxyvinyl polymer, and cationic polymer is blended, the blending raw material for the second agent is also blended appropriately in the first agent. Moreover, you may mix | blend the known 1st agent raw material with the 1st agent which concerns on this embodiment as an arbitrary raw material.

  As the oxidation dye blended in the first agent, one or more selected from known dye intermediates that develop color independently by oxidation reaction are employed. Examples of dye intermediates include phenylenediamine derivatives such as toluene-2,5-diamine sulfate, nitroparaphenylenediamine hydrochloride and paraphenylenediamine; phenol derivatives such as hydrochloric acid 2,4-diaminophenol, orthoaminophenol and paraaminophenol; Is mentioned.

  Moreover, you may employ | adopt 1 type, or 2 or more types selected from the well-known coupler which is oxidized with a dye intermediate body and exhibits a color tone as an oxidation dye of a 1st agent. Examples of the coupler include phenylenediamine derivatives such as 2,4-diaminophenoxyethanol hydrochloride and metaphenylenediamine hydrochloride; aminophenol derivatives such as 5-aminoorthocresol and metaaminophenol; resorcin;

  The compounding density | concentration of the oxidation dye in the 1st agent of this embodiment is 0.05 to 10 mass%, for example.

  When polyacrylic acid amide is blended with the first agent of this embodiment, the blending concentration is, for example, 0.04% by mass or more and 3.0% by mass or less, and 0.1% by mass or more and 2.0% by mass or less. It is good, and 0.2 mass% or more and 1.6 mass% or less are preferable.

  When the carboxyvinyl polymer is blended with the first agent of the present embodiment, the blending concentration is, for example, 0.02% by mass or more and 2.0% by mass or less, and 0.06% by mass or more and 1.0% by mass or less. Good, 0.1 mass% or more and 0.8 mass% or less are preferable.

  When the cationic polymer is blended with the first agent of the present embodiment, the blending concentration is, for example, 0.02% by mass or more and 2.0% by mass or less, and 0.2% by mass or more and 1.6% by mass or less. Is good.

  As a known first agent raw material arbitrarily blended in the first agent of the present embodiment, for example, higher alcohols, nonionic surfactants, cationic surfactants, polyhydric alcohols, hydrocarbons, fats and oils, pH adjusters, antioxidants Agents, chelating agents, and direct dyes.

  Examples of the higher alcohol as the raw material for the first agent include cetanol, isocetyl alcohol, stearyl alcohol, isostearyl alcohol, behenyl alcohol, octyldodecanol, and myristyl alcohol. One or two or more higher alcohols may be blended in the first agent, and the blending concentration of the higher alcohol is appropriately set, and is, for example, 2% by mass or more and 20% by mass or less.

  Nonionic surfactants as raw materials for the first agent are, for example, polyoxyethylene alkyl ether, polyoxyethylene polyoxypropylene alkyl ether, polyoxyethylene fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene sorbitol tetra fatty acid ester Glycerin fatty acid ester, sorbitan fatty acid ester, polyglycerin fatty acid ester, and sucrose fatty acid ester. One or two or more kinds of nonionic surfactants may be blended in the first agent. The blending concentration of the nonionic surfactant is, for example, 0.1% by mass or more and 15% by mass or less.

  Cationic surfactants as raw materials for the first agent include, for example, alkylamine salts, fatty acid amide amine salts, ester-containing tertiary amine salts, arkol-type tertiary amine salts, long-chain alkyltrimethylammonium salts, and di-long-chain alkyldimethylammonium salts. Examples thereof include salts, tri-long chain alkyl monomethyl ammonium salts, benzalkonium type quaternary ammonium salts, and monoalkyl ether type quaternary ammonium salts. One or two or more cationic surfactants may be added to the first agent, and the concentration of the cationic surfactant is, for example, 0.1% by mass or more and 3% by mass or less.

  Examples of the polyhydric alcohol as a raw material for the first agent include ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, dipropylene glycol, glycerin, diglycerin, and butylene glycol. One or more polyhydric alcohols may be blended in the first agent, and the blending concentration of the polyhydric alcohol is, for example, 0.1% by mass or more and 3% by mass or less.

  Examples of the hydrocarbon as the first agent raw material include liquid paraffin, squalane, pristane, ozokerite, paraffin, ceresin, petrolatum, and microcrystalline wax. One or two or more hydrocarbons may be blended in the first agent, and the blending concentration of the hydrocarbon is, for example, 0.1% by mass or more and 10% by mass or less.

  Examples of the oil and fat as the first agent raw material include hardened oil, almond oil, avocado oil, olive oil, shea fat oil, evening primrose oil, camellia oil, peanut oil, and rosehip oil. One or two or more types of fats and oils may be blended in the first agent, and the blending concentration of the fats and oils is, for example, 0.1% by mass or more and 10% by mass or less.

  Examples of the pH adjuster as the first agent raw material include ammonia, 2-amino-2-methyl-1-propanol, triethanolamine, arginine, lactic acid, citric acid, succinic acid, and glycolic acid.

  Examples of the antioxidant as the raw material for the first agent include ascorbic acid and sulfite.

  Examples of the chelating agent as the raw material for the first agent include ethylenediaminetetraacetic acid and its salt, diethylenetriaminepentaacetic acid and its salt, and hydroxyethanediphosphonic acid and its salt.

  The pH of the first agent of this embodiment is, for example, 8.5 to 12.5, and is 9.5 to 11.5 in order to reduce good staining and irritation to the scalp, and 10.0. ~ 11.0 is good.

  Moreover, the dosage form of the 1st agent which concerns on this embodiment is not specifically limited, It is O / W emulsions, such as liquid form, cream form, wax form, and gel form. The viscosity of the first agent in the case of a creamy dosage form is, for example, 10000 mPa · s or more and 60000 mPa · s or less after 60 seconds measured at 25 ° C. and 12 rpm using a B-type viscometer.

(Second agent)
The second agent for obtaining the oxidative hair dye of the present embodiment is one in which an oxidant is blended (typical as the second agent of the present embodiment, the blending amount of water is 70% by mass or more. belongs to.). In the second agent, when not all of the polyacrylamide, the carboxyvinyl polymer, and the cationic polymer are blended in the first agent of the present embodiment, all of them are blended. When any one of polyacrylic acid amide, carboxyvinyl polymer, and cationic polymer is blended, the blending raw material for the first agent is blended as appropriate in the second agent. Moreover, you may mix | blend with the 2nd agent which concerns on this embodiment by using a well-known 2nd agent raw material as an arbitrary raw material.

  Examples of the oxidizing agent blended in the second agent include hydrogen peroxide, bromate, percarbonate, and perborate. Although the compounding density | concentration of the oxidizing agent in a 2nd agent is not specifically limited, For example, they are 0.3 mass% or more and 7 mass% or less.

  When polyacrylic acid amide is blended with the second agent of the present embodiment, the blending concentration is, for example, 0.04 mass% or more and 3.0 mass% or less, and 0.1 mass% or more and 2.0 mass% or less. It is good, and 0.2 mass% or more and 1.6 mass% or less are preferable.

  When the carboxyvinyl polymer is blended with the second agent of the present embodiment, the blending concentration is, for example, 0.02% by mass or more and 2.0% by mass or less, and 0.06% by mass or more and 1.0% by mass or less. Good, 0.1 mass% or more and 0.8 mass% or less are preferable.

  When the cationic polymer is blended with the second agent of this embodiment, the blending concentration is, for example, 0.02% by mass or more and 2.0% by mass or less, and 0.2% by mass or more and 1.6% by mass or less. Is good.

  As the known second agent raw material optionally blended in the second agent of the present embodiment, higher alcohol (the blending concentration is, for example, 2% by mass or more and 15% by mass or less), nonionic surfactant (the blending concentration is, for example, 0.8%). 5 wt% or more and 6 wt% or less), a cationic surfactant (formulation concentration is 0.1 wt% or more and 3 wt% or less, for example), polyhydric alcohol, ester oil, antioxidant, chelating agent, and the like.

  The dosage form of the second agent is not particularly limited, and examples thereof include liquid, cream, and gel.

  Hereinafter, the present invention will be described more specifically with reference to examples. However, the present invention is not limited to the following examples unless departing from the gist of the present invention.

(First agent)
The raw material shown to the following Tables 1-4 was mix | blended with water, and the 1st agent for obtaining the oxidation hair dye of an Example and a comparative example was prepared. The dosage form of these first agents was a cream O / W emulsion.

(Second agent)
As a common second agent for obtaining the oxidative hair dye of Examples and Comparative Examples, hydrogen peroxide 6% by mass, coconut oil fatty acid amidopropyl betaine 0.1% by mass, myristyl alcohol 3% by mass, liquid paraffin 0.4 A mixture of raw materials having a blending concentration of mass%, lanolin 0.4 mass%, and polyoxyethylene cetyl ether 2 mass% in water was prepared.

(Oxidative hair dye)
The 1st agent and 2nd agent which were prepared above were mixed by mass ratio 1: 1, and the oxidative hair dye of the Example and the comparative example was obtained. The dosage form of the oxidative hair dye was creamy, and the pH ranged from 10.0 to 10.5.

(Hair dyeing treatment)
One of the oxidative hair dyes of Examples and Comparative Examples was applied to a hair bundle (5 to 8 g of a hair bundle of about 30 cm in length collected from a general woman), and the hair bundle was left at room temperature for 20 minutes. Then, the oxidative hair dye was washed away from the hair bundle with warm water, and dried with warm air while combing the hair bundle. The above was used as the hair dyeing process.

(Evaluation of oxidative hair dye)
Three professional evaluators evaluated the “gloss” of the hair bundle when natural light was irradiated after the hair dyeing treatment, “dyeability” of the hair bundle when natural light was irradiated after the hair dyeing treatment, and dyeing. The hair bundle after the hair treatment was evaluated for “grouping up to the hair tips” and “squeaking when the hair dye was washed away” from the hair bundle during the hair dyeing process. The evaluation in Table 1 is based on Comparative Example 1c, the evaluation in Table 2 is based on Example 2, the evaluation in Table 3 is based on Example 3, and the evaluation in Table 4 is Based on Example 4a.

  The evaluation results are as shown in Tables 1 to 4 below, and the results are the same for all the evaluators. Details of the evaluation results are as follows.

Gloss of hair A: There was gloss more than the hair bundle evaluated as “◯” below.
○: The gloss was higher than the standard.
-: Standard or equivalent to standard ×: There was no gloss than the standard.

Dyeability ○: Dyeed more than the standard.
―: Standard or equivalent.
X: It was not dye | stained rather than the reference | standard.

Coarse up to the hair ends ○: The hair ends up to the standard.
―: Standard or equivalent.
X: The hair tip was not settled rather than the reference | standard.

Squeak when washing away ○: There was no squeak (bad fingering, tangled hair on the finger) than the standard.
―: Standard or equivalent.
X: There was a squeaker than the standard.

  Separately from the evaluation of the oxidation hair dye, a raster value was calculated for the hair bundle subjected to the hair dyeing treatment. The raster value was calculated using “SAMBA Hair System” manufactured by Bossa Nova Technologies. In each table below, “Δ raster value (%)” indicates a difference when the standard raster value in each table is 100%. In addition, it is said that a high raster value is an element that increases the gloss of hair.

  In Table 1 above, it is shown that only Example 1 in which polyacrylic acid amide and carboxyvinyl polymer were blended had particularly good gloss, good dyeability, and unity to the ends. That is, according to the oxidative hair dye which concerns on this invention, it can confirm that gloss is especially favorable and dyeability and the unity to a hair tip become favorable.

  In Table 2 above, Example 2 using polyacrylic acid amide in combination with a carboxyvinyl polymer is an anionic polymer alkyl acrylate copolymer, alkyl acrylate / vinyl acetate copolymer, Alternatively, it is shown that the gloss and dyeing properties were superior to those of Comparative Example 2a, Comparative Example 2b, and Comparative Example 2c using an acrylic acid / acrylic acid amide / ethyl acrylate copolymer. That is, it can be confirmed that the use of polyacrylic acid amide as a raw material used in combination with a carboxyvinyl polymer in an oxidative hair dye is advantageous for gloss and dyeability. Also, blending anionic polymer (alkyl acrylate copolymer, alkyl acrylate / vinyl acetate copolymer, acrylic acid / acrylic acid amide / ethyl acrylate copolymer) with oxidative hair dye is It can be confirmed that it is disadvantageous to dyeability.

  In Table 2 above, Example 2 using polyacrylic acid amide in combination with carboxyvinyl polymer is polyvinyl pyrrolidone or acrylic acid octylamide / hydroxypropyl acrylate / butylaminoethyl methacrylate copolymer. It is shown that the gloss and the dyeability were superior to those of Comparative Example 2d and Comparative Example 2e used. Even from these evaluation results, it can be confirmed that the use of polyacrylic acid amide as a raw material used in combination with the carboxyvinyl polymer in the oxidative hair dye is advantageous in terms of gloss and dyeability.

  In Table 3, as in the results in Table 2, it is advantageous for gloss and dyeing properties to employ polyacrylamide as a raw material used in combination with a carboxyvinyl polymer in an oxidative hair dye. Can be confirmed.

  In Table 4, it is shown that the gloss and dyeing properties of Example 4a not containing the cationic polymer and Examples 4b to 4e containing the same polymer were equivalent. The amount of the cationic polymer (chlorinated O- [2-hydroxy-3- (trimethylammonio) propyl] hydroxyethylcellulose) is increased in Example 4c than in Example 4b, but the gloss and dyeing properties are increased. It is equivalent. These facts show that even if a cationic polymer is added to the oxidative hair dye according to the present invention, the gloss and dyeability are not affected, or the reduction thereof can be suppressed. In addition, the results of evaluation of “group to hair tips” and “squeak when washed out” of Examples 4b to 4e containing the cationic polymer were better than those of Example 4a. In the case of the agent, it is shown that the combination of the cationic polymer improves the uniting to the hair tips and the squeak when washing off.

Claims (6)

A first agent containing an oxidative dye and a second agent containing an oxidant are mixed , the pH is 8.0 to 12.0 , polyacrylamide, carboxyvinyl polymer, and cationic polymer A method for producing an oxidative hair dye characterized by obtaining an oxidative hair dye blended with The method for producing an oxidative hair dye according to claim 1, wherein the concentration of the cationic polymer in the oxidative hair dye is 0.01% by mass or more and 1.0% by mass or less. Polyacrylic acid amide, carboxy manufacturing method of oxidizing hair dye according to claim 1 or 2 vinyl polymers and cationic polymers uses a first agent engaged distribution. The oxidative hair dye contains an anionic polymer other than the carboxyvinyl polymer, and the concentration of the polyacrylic amide is higher than the concentration of the anionic polymer other than the carboxyvinyl polymer. The method for producing an oxidative hair dye according to any one of claims 1 to 3. The method for producing an oxidative hair dye according to claim 4, wherein the blending concentration of the anionic polymer other than the carboxyvinyl polymer in the oxidative hair dye is 0.5% by mass or less. The method for producing an oxidative hair dye according to any one of claims 1 to 3, wherein the oxidative hair dye contains no anionic polymer other than the carboxyvinyl polymer.