JP2021161028A - Oxidative hair dye first agent - Google Patents

Abstract

To provide an oxidative hair dye first agent that can dye the hair with a bright warm color using an oxidative dye and has excellent finger passage and soft touch during rinsing.SOLUTION: The oxidative hair dye first agent of the present invention contains 4 to 12 mass% of a component (A) consisting of monoethanolamine (MEA) and 2-amino-2-methyl-1-propanol (AMP), 2.5 to 7.5 mass% of an anionic surfactant (B), and 14 to 22 mass% of a nonionic surfactant (C) consisting of coconut oil fatty acid monoethanolamide and a nonionic surfactant with HLB3 to 15 (but excluding coconut oil fatty acid monoethanolamide), the mass ratio (AMP/MEA) of the monoethanolamine (MEA) to the 2-amino-2-methyl-1-propanol (AMP) being 0.5 to 14, and the mass ratio of the coconut oil fatty acid monoethanolamide to the nonionic surfactant with HLB3 to 15 (coconut oil fatty acid monoethanolamide/nonionic surfactant with HLB3 to 15) being 0.5 to 1.5.SELECTED DRAWING: None

Description

The present invention relates to the first oxidative hair dye.

Oxidative hair dye is widely used as one of the hair coloring agents. Oxidative hair dyes are commercially available as one-agent type, two-agent type, three-agent type, etc. Among them, the first agent containing an oxidation dye and the second agent containing hydrogen peroxide are composed. The two-agent type is the mainstream.

As the physical characteristics of the oxidative hair dye, it is required that the first agent and the second agent are easily mixed and that they do not drip from the hair or brush when applied to the hair. The mainstream dosage forms of oxidative hair dyes are milky and creamy, and foamy ones are also commercially available.

Dyes to be blended in oxidative hair dyes include oxidative dyes and direct dyes. Oxidation dyes are preferred as dyes to be blended in oxidative hair dyes because they cause less discoloration after dyeing. The oxidative dye allows the hair to be dyed with a desired color by infiltrating the oxidative dye into the hair and developing a color by oxidative polymerization. Although the direct dye tends to fade after dyeing, the dye can be directly permeated into the hair and the hair can be dyed directly to the color tone of the dye, so that it is suitable when it is desired to develop a vivid color.

In particular, among bright colors, when dyeing warm colors, it is difficult to achieve vividness with oxidation dyes, so direct dyes have been used. However, since the direct dye has a problem of easily fading, it is desired to dye the hair with a bright warm color by using an oxidation dye.

For example, Patent Document 1 discloses an oxidative hair dye that can dye hair to a yellow hue by combining a specific oxidative dye, makes it difficult for the dyed hair to fade, and has excellent toughness. ing.

JP-A-2010-126497

However, although the technique of Patent Document 1 can dye a yellowish color, the vividness is not a satisfactory quality. In addition, there is a problem that the hair gets caught and the texture becomes hard.

Therefore, according to the present invention, the first oxidative hair dye is capable of dyeing hair with a bright warm color using an oxidative dye, and is excellent in finger passage and softness to the touch during rinsing. The challenge is to provide the agent.

The present inventor has diligently studied to solve the above problems. As a result, they have found that the first oxidative hair dye having the following constitution can solve the above-mentioned problems, and have completed the present invention.
The present invention is, for example, the following [1] to [6].

[1] 4 to 12% by mass of a component (A) composed of monoethanolamine (MEA) and 2-amino-2-methyl-1-propanol (AMP), and an anionic surfactant (B) 2.5 to Nonionic surfactants (C) 14-22 consisting of 7.5% by mass, coconut oil fatty acid monoethanolamide, and nonionic surfactants of HLB 3 to 15 (excluding coconut oil fatty acid monoethanolamide). The coconut oil contains% by mass and has a mass ratio (AMP / MEA) of the monoethanolamine (MEA) to the 2-amino-2-methyl-1-propanol (AMP) of 0.5 to 14. Oxidation in which the mass ratio of the fatty acid monoethanolamide to the nonionic surfactant of HLB 3 to 15 (palm oil fatty acid monoethanolamide / nonionic surfactant of HLB 3 to 15) is 0.5 to 1.5. The first hair dye.

[2] The first oxidative hair dye according to [1], which further comprises an amphoteric surfactant (D).
[3] The first oxidative hair dye according to [1] or [2], which further comprises a cationized polymer (E).

[4] The first oxidative hair dye according to any one of [1] to [3], which is a transparent liquid.
[5] The first oxidative hair dye according to any one of [1] to [4], which has a pH of 9 to 13.

[6] The first oxidative hair dye according to any one of [1] to [5], which becomes a gel when the following test (I) is performed.
Test (I): 1 g of the first oxidative hair dye and 1 g of the second oxidative hair dye containing 2% by mass of hydrogen peroxide are mixed.

INDUSTRIAL APPLICABILITY The present invention provides a first oxidative hair dye that can dye hair with a bright warm color using an oxidative dye and is excellent in finger passage and softness to the touch during rinsing. can.

Next, the first oxidative hair dye of the present invention will be specifically described.
<Oxidation hair dye first agent>
In the present invention, the first oxidative hair dye refers to the first agent in the two-agent oxidative hair dye.
The first oxidative hair dye of the present invention is usually used together with the second oxidative hair dye containing hydrogen peroxide.
In the present invention, the first oxidative hair dye is also referred to as the first agent, and the second oxidative hair dye is also referred to as the second agent.

The first oxidative hair dye of the present invention contains 4 to 12% by mass of the component (A) composed of monoethanolamine (MEA) and 2-amino-2-methyl-1-propanol (AMP) and an anionic interface. Nonionic property consisting of 2.5 to 7.5% by mass of activator (B), coconut oil fatty acid monoethanolamide, and nonionic surfactant of HLB 3 to 15 (excluding coconut oil fatty acid monoethanolamide). It contains 14 to 22% by mass of the surfactant (C), and the mass ratio (AMP / MEA) of the monoethanolamine (MEA) to the 2-amino-2-methyl-1-propanol (AMP) is 0. The mass ratio of the coconut oil fatty acid monoethanolamide to the nonionic surfactant of HLB 3 to 15 (palm oil fatty acid monoethanolamide / nonionic surfactant of HLB 3 to 15) is 0. It is 5 to 1.5.

In the present invention, HLB (Hydrophile-Lipophilic Balance) means a value calculated from Griffin's formula.
The numerical value of each component in the present invention represents the mass% of each component when the first oxidative hair dye is 100% by mass, and shows the value converted into pure content.

<Ingredient (A)>
In the present invention, the component (A) composed of monoethanolamine (MEA) and 2-amino-2-methyl-1-propanol (AMP) is also referred to as a component (A).
The first oxidative hair dye of the present invention contains the component (A) in an amount of 4 to 12% by mass, preferably 6 to 8% by mass.

When the component (A) is within the above range, warm colors can be vividly dyed.
If the amount of the component (A) is less than the lower limit, the color will not be vividly developed even if a warm color is dyed, and the color will be dark. If the amount of the component (A) is more than the above upper limit amount, the finger passage during rinsing becomes poor and the hair feels firm.

In the present invention, the warm colors refer to red, orange, yellow, etc., and specifically, the hair dyed with an oxidative hair dye has a Munsell color hue of 10RP to 5Y. It shows a hue of 4 or more in lightness and 10 or more in saturation.

The first oxidative hair dye of the present invention has a mass ratio (AMP / MEA) of 0.5 to 14 of the monoethanolamine (MEA) and the 2-amino-2-methyl-1-propanol (AMP). , Preferably 2-6.

When the mass ratio (AMP / MEA) is within the above range, the dosage form becomes a transparent liquid, turbidity does not occur due to precipitation of components, and the stability is excellent.
The present inventor can vividly dye warm colors with an oxidation dye when the component (A) is in the above amount and has the above mass ratio (AMP / MEA). I found.

<Anionic surfactant (B)>
The first oxidative hair dye of the present invention contains the anionic surfactant (B) in an amount of 2.5 to 7.5% by mass, preferably 4 to 6.5% by mass, and more preferably 4.5 to 5. Contains 5% by mass.
When the anionic surfactant (B) is within the above range, the viscosity of the mixed solution obtained by mixing the first agent and the second agent in approximately equal amounts becomes extremely high, and the mixture drips when applied to hair. Excellent operability. In addition, it is excellent in finger passage and softness to the touch during rinsing.

The anionic surfactant (B) is preferably at least one selected from sodium tetradecene sulfonate, sodium POE lauryl ether sulfate, and triethanolamine N-palm oil fatty acid acyl-L-glutamate, and is anionic. More preferably, the sex surfactant (B) is sodium tetradecene sulfonate.
The anionic surfactant (B) may be used alone or in combination of two or more.

<Nonionic surfactant (C) consisting of coconut oil fatty acid monoethanolamide and nonionic surfactant of HLB3 to 15 (excluding coconut oil fatty acid monoethanolamide)>
In the present invention, the component (C) is a nonionic surfactant (C) composed of a coconut oil fatty acid monoethanolamide and a nonionic surfactant of HLB3 to 15 (excluding the coconut oil fatty acid monoethanolamide). Also written.

The first oxidative hair dye of the present invention contains the component (C) in an amount of 14 to 22% by mass, preferably 16 to 20% by mass, and has a nonionic surfactant of the coconut oil fatty acid monoethanolamide and the HLB 3 to 15. The mass ratio with the agent (palm oil fatty acid monoethanolamide / nonionic surfactant of HLB 3 to 15) is 0.5 to 1.5, preferably 0.8 to 1.2.

When the mass of the component (C) is within the above range, the viscosity of the mixed solution obtained by mixing the first agent and the second agent in approximately equal amounts becomes very high, and when applied to the hair, it drips from the hair. Excellent operability. In addition, it is excellent in finger passage and softness to the touch during rinsing.

When the mass ratio of the coconut oil fatty acid monoethanolamide to the nonionic surfactant of HLB3 to 15 (coconut oil fatty acid monoethanolamide / nonionic surfactant of HLB3 to 15) is within the above range, The viscosity of the mixed solution in which the first agent and the second agent are mixed in approximately equal amounts is extremely high, does not drip when applied to hair, and is excellent in operability.
The coconut oil fatty acid monoethanolamide is not particularly limited, but as a commercially available product, for example, Amizol CME (Kawaken Fine Chemical Co., Ltd.) can be used.

Nonionic surfactants of HLB 3-15 are POE tridecyl ether (HLB 7.9), POE oleyl ether (HLB 14.5), sorbitan sesquioleate (HLB 3.7), POE oleyl ether (HLB 17.4), and It is preferably at least one selected from POE cetyl ether (HLB20). Specifically, POE (3) tridecyl ether (HLB7.9), POE (16) oleyl ether (HLB14.5), sorbitan sesquioleate (HLB3.7), POE (20) oleyl ether (HLB17.4). ), And at least one selected from POE (150) cetyl ether (HLB20), POE (16) oleyl ether (HLB14.5), POE (3) tridecyl ether (HLB7.9), And at least one selected from sorbitan sesquioleate (HLB 3.7) is more preferred.
The nonionic surfactants of HLB3 to 15 may be used alone or in combination of two or more.

The first oxidative hair dye of the present invention contains 16 to 20% by mass of the component (C), and the component (C) is a coconut oil fatty acid monoethanolamide and POE (3) tridecyl ether (HLB7.9). It consists of POE (16) oleyl ether (HLB14.5) and HLB3-15 nonionic surfactant consisting of sorbitan sesquioleate (HLB3.7), said coconut oil fatty acid monoethanolamide and said HLB3-15. The mass ratio of oleic acid to the nonionic surfactant (palm oil fatty acid monoethanolamide / nonionic surfactant of HLB 3 to 15) is most preferably 0.8 to 1.2.

<Amphoteric surfactant (D)>
The first oxidative hair dye of the present invention contains the amphoteric surfactant (D) in an amount of preferably 0.05 to 3% by mass, more preferably 0.1 to 1% by mass.
It is preferable that the amphoteric surfactant (D) is within the above range because it is excellent in finger passage and softness to the touch during rinsing.

Examples of the amphoteric tenside (D) include betaine types such as cocamidopropyl betaine, lauryldimethylaminoacetic acid betaine, lauric acid amide propyl betaine, and coconut oil fatty acid amide propyl betaine; 2-undecyl-N, N, N- (Hydroxyethylcarboxymethyl) -2-imidazoline Imidazoline type such as sodium; amino acid type can be mentioned. Among these, the amphoteric surfactant (D) is preferably at least one selected from amide propyl betaine laurate, amide propyl betaine coconut oil fatty acid, and cocamidopropyl betaine, and is preferably the oxidative hair dye. Since one agent can be made more transparent and the mixed solution of the first oxidative hair dye and the second oxidative hair dye mixed in approximately equal amounts foams, it becomes a gel with extremely high viscosity. More preferably, it is amidopropyl betaine laurate.
The amphoteric surfactant (D) may be used alone or in combination of two or more.

<Cationized polymer (E)>
The first oxidative hair dye of the present invention preferably contains the cationized polymer (E) in an amount of 0.001 to 0.05% by mass, more preferably 0.005 to 0.01% by mass.

When the cationized polymer (E) is within the above range, it is preferable because it is excellent in finger passage and softness to the touch during rinsing.
Examples of the cationized polymer (E) include cationized cellulose, cationized guar gum, diallyl quaternary ammonium salt / acrylamide copolymer, cationized starch, cationized xanthan gum, vinyl imidazolium trichloride / vinyl pyrrolidone copolymer, and hydroxy. Ethylcellulose / dimethyldialylammonium chloride copolymer, vinylpyrrolidone / quaternized dimethylaminoethylmethacrylate copolymer, vinylpyrrolidone / alkylaminoacrylate copolymer, vinylpyrrolidone / alkylaminoacrylate / vinylcaprolactam copolymer, vinylpyrrolidone / Methylamidopropyl trimethylammonium chloride copolymer, alkylacrylamide / acrylate / alkylaminoalkylacrylamide / polyethylene glycol methacrylate copolymer, adipate / dimethylaminohydroxypropylethylenetriamine copolymer, cationized phenuglique gum, cationized tara gum, cation Examples include polymerized locust bean gum.

Specific examples of the cationized polymer (E) include cationized cellulose ether (polyquaternium-10), guarhydroxypropyltrimonium chloride, and dimethyldialylammonium chloride / acrylamide copolymer (polyquaternium-7). Among these, a dimethyldiallylammonium chloride / acrylamide copolymer is preferable because it is excellent in thickening.
The cationized polymer (E) may be used alone or in combination of two or more.

<Other ingredients>
The first oxidative hair dye of the present invention usually contains an oxidative dye. In the present invention, the oxidative dye is not particularly limited, and examples thereof include a dye intermediate that develops a color by oxidative polymerization, a coupler that changes to various colors by reaction with the dye intermediate, and a melanin precursor.

More specifically, for example, as an oxidation dye, phenylenediamine and its derivatives, phenol derivatives, aminophenols and its derivatives, diphenylamine and its derivatives, pyridine derivatives, pyrimidine derivatives, pyrazole derivatives, pyrrolidine derivatives, toluene derivatives, indol derivatives, etc. Examples thereof include pyrrole derivatives and imidazole derivatives.

More specifically, for example, as the dye intermediate, phenylenediamines (however, excluding metaphenylenediamine), aminophenols (however, metaaminophenol, 2,4-diaminophenol and paramethylaminophenol) are used. Excludes), toluylene diamines (excluding toluene-3,4-diamine and toluene-2,4-diamine), diphenylamines, diaminophenylamines, N-phenylphenylenediamines, diaminopyridines (excluding) However, 2,6-diaminopyridine) and the like can be mentioned.

Among the dye intermediates, para-aminophenol, para-phenylenediamine, para-tylylenediamine, N, N-bis (2-hydroxyethyl) -para-phenylenediamine, N-phenyl- Para-phenylenediamine, 4,4'-diaminodiphenylamine, 2-chloropara-phenylenediamine, N, N-dimethylpara-phenylenediamine, ortho-aminophenol, 2,6-dichloropara-phenylenediamine, para-aminophenyl sulfamic acid and the like are preferable, and warm colors are used. Para-aminophenol and para-phenylenediamine are more preferable because they can dye the system colors more vividly.

Couplers include paraaminoortocresol, resorcin, pyrogallol, catechol, metaaminophenol, metaphenylenediamine, 2,4-diaminophenol, 1,2,4-benzenetriol, toluene-3,4-diamine, toluene-2, 4-diamine, hydroquinone, α-naphthol, 2,6-diaminopyridine, 1,5-dihydroxynaphthalene, paramethylaminophenol, 2,4-diaminophenoxyethanol, gallic acid, tannic acid, ethyl gallate, methyl gallate, Examples thereof include propyl gallate, quintuple, 5- (2-hydroxyethylamino) -2-methylphenol and the like.

Among the couplers, paraaminooltocresol and metaaminophenol are more preferable because they develop a warm color by oxidative polymerization with a dye intermediate, and paraaminoortocresol is most preferable because they have a highly saturated color.

Since the oxidation dye of the present invention is particularly excellent in highly saturated color development, it is preferable to use para-aminophenol as a dye intermediate and para-amino orthocresol as a coupler.

The oxidative dye is a concept including a salt of a compound capable of developing a color by oxidative polymerization. Examples of the salt of the above compound include an acid addition salt and the like, and preferably an organic acid addition salt and an inorganic acid addition salt.
The oxidation dye may be used alone or in combination of two or more.

The content of the oxidative dye in the first oxidative hair dye of the present invention is not particularly limited, but the total amount of the dye intermediate and the coupler is preferably 0.005 to 5% by mass.

The first oxidative hair dye of the present invention usually contains water. The content of water is not particularly limited, and it can be appropriately adjusted and used according to the purpose of use. Specific examples of the water include tap water, ion-exchanged water, distilled water, purified water and natural water, and sterilized water is preferable.

The first oxidative hair dye of the present invention preferably contains 20 to 50% by mass, more preferably 25 to 43% by mass of water, and is preferably ion-exchanged water.
The first oxidative hair dyeing agent of the present invention may contain any component other than the above-mentioned components as long as the effects of the present invention are not impaired. Optional ingredients include, for example, emulsifiers, solubilizers, penetrants, water-soluble polymers, pH regulators, polyhydric alcohols, sugars, plant extracts, stabilizers, moisturizers, biologics, metal sequestering agents (chelates). Agents), preservatives, antioxidants, cooling agents, antioxidants, vitamins, proteins, fragrances, pigments, solvents.
The first oxidative hair dye of the present invention may contain a direct dye as long as the effect of the present invention is not impaired, but since discoloration is likely to occur, the direct dye is substantially not contained. Is preferable.

The fact that the direct dye is not substantially contained means that the amount of the direct dye in 100% by mass of the first oxidative hair dye is usually 0 to 0.01% by mass, preferably 0 to 0.005% by mass. Means that.
The first oxidative hair dye of the present invention can be used as an alkaline agent other than the component (A) as long as the effect of the present invention is not impaired, for example, ammonia such as ammonium hydrogencarbonate and ammonium salt; diethanolamine and triethanol. Alkanolamines such as amines, monopropanolamines and dipropanolamines; sodium hydroxide; sodium silicate; arginine; potassium carbonate; sodium hydrogencarbonate; may be contained, but these components may be substantially not contained. preferable.

The fact that the alkaline agent other than the component (A) is not substantially contained means that the amount of the alkaline agent in 100% by mass of the first oxidative hair dye is usually 0 to 1% by mass, preferably 0 to 0.5. It means that it is mass%.

The first oxidative hair dye of the present invention has a pH of preferably 9 to 13, more preferably 9 to 12. When the pH of the first oxidative hair dye is within the above range, it is preferable because it causes less irritation to the skin and can alleviate discomfort during the treatment.

Warm colors of oxidative dyes are easily dyed on hair when the pH of the first agent is high, but the stability of the first agent is poor and discoloration during storage has become a problem. Another problem is that high pH causes hair damage and skin irritation.

Further, in order to vividly dye warm colors, the present inventor makes it difficult for the pH of the mixed solution of the first agent and the second agent to be lower than the pH of the first agent, and the difference is different. We found that smallness is also important.

The first oxidative hair dye of the present invention is a test (I) in which 1 g of the first oxidative hair dye and 1 g of the second oxidative hair dye containing 2% by mass of hydrogen peroxide are mixed. At that time, it is preferably in the form of a gel, and more preferably in the form of a transparent gel.

<Manufacturing method>
The first oxidative hair dyeing agent of the present invention can be produced by, for example, stirring, mixing, heating, dissolving, dispersing, etc. by a known method, except that each of the above-mentioned components is used in the above-mentioned amount. , The manufacturing method is not particularly limited. As a production method, in order to uniformly mix each component, it may be carried out under heating conditions. Examples of the temperature in the case of manufacturing under heating conditions include 75 to 85 ° C.

<Dosage form>
The first oxidative hair dye of the present invention is preferably a transparent liquid.
The first oxidative hair dye of the present invention is preferably transparent because it reminds us of freshness and freshness.
The first oxidative hair dyeing agent of the present invention is more preferably non-thick and watery liquid from the viewpoint that the second oxidative hair dyeing agent can be easily mixed uniformly.

<How to use>
The first agent of the oxidative hair dye of the present invention is the first agent of the two-agent type oxidative hair dye.
When the first oxidative hair dye of the present invention is used, the first oxidative hair dye of the present invention and the second oxidative hair dye containing hydrogen peroxide are usually mixed immediately before use. After that, it is preferable to apply it to the hair.

When the first agent and the second agent containing hydrogen peroxide are mixed, the mixing ratio thereof is appropriately adjusted in order to dye the hair with a desired color. The weight ratio of is preferably 1: 1 to 1: 5.

In the present invention, it is preferable that the mixed solution of the first agent and the second agent is in the form of a gel. In the present invention, the mixture is preferably in the form of a transparent gel, more preferably in the form of a highly viscous transparent gel. The gel form is preferable because it does not drip from the hair or brush when applied to the hair and has excellent operability.

In the present invention, the oxidative hair dye comprises the first oxidative hair dye of the present invention and the second oxidative hair dye containing hydrogen peroxide, the first oxidative hair dye and the excess. A mixture of a second oxidative hair dye containing hydrogen oxide in a weight ratio (first oxidative hair dye: second oxidative hair dye) 1: 1 to 1: 5 is a transparent gel. Is preferable.

According to the present invention, since the first agent of the oxidative hair dye of the present invention is used, the mixed solution of the first agent and the second agent does not cause cloudiness, precipitation, precipitation, etc., and is transparent and very very. It was found that the viscosity is high.

Further, the present inventor presents the difference between the pH of the first agent of the present invention and the pH of the mixed solution obtained by mixing the first agent and the second agent in approximately equal amounts (pH of the first agent-pH of the mixed solution). It was found that the smaller the value, the more vividly the hair can be dyed. Specifically, the difference between the pH of the first agent of the present invention and the pH of the mixed solution (pH of the first agent-pH of the mixed solution) is preferably 1.0 to 1.5, more preferably 1.0 to 1.5. When it is 0.6 to 0.9, most preferably 0 to 0.5, the dyeing can be performed more vividly.

To dye the hair with a desired color using the first oxidative hair dye of the present invention, for example, the following procedure can be performed.
First, the first oxidative hair dye of the present invention and the second oxidative hair dye containing hydrogen peroxide are mixed to prepare a mixed solution. Next, the hair is wetted with running water, lightly towel-dried, and then the mixed solution is applied with a brush so as to cover the entire hair and left at 20 ° C. to 28 ° C. for 10 to 45 minutes. Then, by washing with hot water at 35 to 42 ° C. and appropriately using a shampoo and a treatment agent, the first oxidative hair dye of the present invention is used to give the hair a desired color, preferably bright. It is possible to dye warm colors.

It is also possible to prepare a mixed solution by mixing the first oxidative hair dye of the present invention and the second oxidative hair dye containing hydrogen peroxide in a container such as an applicator. After putting the mixed solution on the hair, it can be applied by rubbing it with a gloved hand.

Next, the present invention will be described in more detail with reference to examples, but the present invention is not limited thereto.

<Examples 1 to 50, Comparative Examples 1 to 21>
In the examples and comparative examples, the commercially available products shown in Table 1 were used.
The numerical values of the formulations in Table 2 represent the mass% of each component when the second oxidative hair dye is 100% by mass, and show the values converted to pure content.
The numerical values of the formulations in Tables 3 to 10 represent the mass% of each component when the first oxidative hair dye is 100% by mass, and show the values converted to pure content.

<Evaluation method>
The first oxidative hair dye produced in each of the manufactured Examples and Comparative Examples was evaluated according to the evaluation items and evaluation criteria described in (1) and (2).

Next, a mixed solution of 1 g of the first oxidative hair dye and the second oxidative hair dye prepared as shown in Table 2 was prepared. The mixed solution was in the form of a transparent gel. The pH of this mixed solution was measured and evaluated according to the evaluation items and evaluation criteria described in (4).

Ten professional panelists (cosmetologists) wet the hair bundles (10 cm, 1 g) (17 Lv hair bundles; BR-3-A; manufactured by Burax Co., Ltd.) with running water, lightly towel dry, and then the mixed solution. The entire amount of was applied to the hair bundle with a brush. After standing at 25 ° C. for 15 minutes, the hair bundle was washed with a 10% Alscope DA-330S (manufactured by Toho Chemical Industry Co., Ltd.) aqueous solution, rinsed, and the hair bundle was dried.

Finally, the vividness of the color of the hair bundle was observed. The hair bundles of the examples had hues of Munsell color system of 5R to 5YR, a lightness of 4 or more, and a saturation of 10 or more.
A series of treatments were evaluated by the above-mentioned specialized panelists (cosmetologists) according to the evaluation items and evaluation criteria described in (3) and (5) to (7). The average of the evaluation points was calculated and evaluated as follows.

<< Evaluation Criteria A >> Evaluation items (1) to (5)
⊚: The average evaluation score is 3.5 points or more.
◯: The average evaluation score is 2.5 points or more and less than 3.5 points.
Δ: The average of the evaluation points is 1.5 points or more and less than 2.5 points.

<< Evaluation Criteria B >> Evaluation items (6) and (7)
◎ ◎: The average evaluation score is 4.5 points or more.
⊚: The average evaluation score is 3.5 points or more and less than 4.5 points.
◯: The average evaluation score is 2.5 points or more and less than 3.5 points.
Δ: The average of the evaluation points is 1.5 points or more and less than 2.5 points.

<< Evaluation items and evaluation criteria >>
(1) Viscosity of First Oxidizing Hair Dyeing Agent 80 g of the first oxidative hair dyeing agent was filled in a glass container of 100 mL, and the container was tilted to evaluate the viscosity.
4 points: Completely liquid 3 points: Slightly thick liquid 2 points: Very thick liquid 1 point: Jelly-like semi-solid

(2) Transparency of the first oxidative hair dye The transparency of the first agent was visually evaluated.
4 points: completely transparent and not turbid 3 points: almost transparent and less turbid 2 points: turbid 1 point: very turbid

(3) Viscosity of mixed solution and ease of application Evaluate the viscosity of the mixed solution and the ease of application when the mixed solution of the first agent and the second agent is applied on the hair with a brush. bottom.
4 points: Easy to apply with very high viscosity and does not drip 3 points: Easy to apply with high viscosity and slightly drips 2 points: Difficult to apply with low viscosity and drips 1 point: Difficult to apply with very low viscosity and drips Does not stay on the hair

(4) pH reduction of the mixed solution The difference between the pH of the first agent and the pH of the mixed solution obtained by mixing the first agent and the second agent (pH of the first agent-pH of the mixed solution) is calculated and evaluated. bottom.
4 points: pH difference is 0 to 0.5
3 points: pH difference is 0.6 to 0.9
2 points: pH difference is 1.0 to 1.5
1 point: pH difference is 1.6 or more

(5) Color development After dyeing with a warm color, the hair bundles washed and dried were visually evaluated for vividness.
4 points: Very vivid color 3 points: Slightly vivid color 2 points: Slightly dark color 1 point: Almost no color

(6) Good finger passage during rinsing The finger passage when rinsing the dyed hair bundle was evaluated by touch.
5 points: Very good finger passage and feels soft 4 points: Very good finger passage 3 points: Good finger passage 2 points: Poor finger passage 1 point: Very poor finger passage

(7) Softness after drying After rinsing the dyed hair bundle and drying it with a dryer, the softness when touching the hair bundle or passing a finger through it was evaluated by touch.
5 points: Very soft and silky 4 points: Very soft 3 points: Soft 2 points: Hard 1 point: Very hard

The first oxidative hair dye produced in Examples 1 to 50 gave good results in the evaluations of (1) to (7). Examples 44, 45, 48, and 49 gave particularly good results.
It can be seen that the first oxidative hair dye of the present invention can dye hair with bright warm colors using an oxidative dye, and is excellent in finger passage and softness to the touch during rinsing.

Furthermore, it can be seen that the mixed solution of the first and second oxidative hair dyes of the present invention becomes a transparent gel, does not drip from the hair when applied, and is excellent in operability.
The first oxidative hair dye produced in Comparative Example 1 had a mass ratio (AMP / MEA) of 2-amino-2-methyl-1-propanol (AMP) and monoethanolamine (MEA) higher than the specified value. Due to its small size, the first agent became slightly turbid and did not become transparent. Further, the difference between the pH of the first agent and the pH of the mixed solution of the first agent and the second agent (pH of the first agent-pH of the mixed solution) was large, and the color was slightly dark.

The first oxidative hair dye produced in Comparative Example 2 had a mass ratio (AMP / MEA) of 2-amino-2-methyl-1-propanol (AMP) and monoethanolamine (MEA) higher than the specified value. Since it was large, the difference between the pH of the first agent and the pH of the mixed solution of the first agent and the second agent (pH of the first agent-pH of the mixed solution) was large, and the color was slightly dark.

The first oxidative hair dye produced in Comparative Example 3 had a slightly dark color because the mass of the component (A) was less than the specified value.
Since the mass of the component (A) of the first oxidative hair dye produced in Comparative Example 4 was larger than the specified value, finger passage during rinsing was poor and hardness was obtained after drying.

Since the first oxidative hair dye produced in Comparative Examples 5 to 9 does not use the component (A) specified in the present invention, the color is slightly dark or the first agent becomes turbid and becomes transparent. did not become.
Since the mass of the anionic surfactant (B) of the first oxidative hair dye produced in Comparative Example 10 was less than the specified value, the viscosity was too low to be applied and the hair drips.

The first oxidative hair dye produced in Comparative Example 11 had a mass of the anionic surfactant (B) larger than the specified value, so that it was difficult to pass through the fingers during rinsing and had hardness after drying.
The first oxidative hair dye produced in Comparative Examples 12 and 13 had a mass ratio of coconut oil fatty acid monoethanolamide to a nonionic surfactant of HLB3 to 15 (coconut oil fatty acid monoethanolamide / HLB3 to 15). Since the nonionic surfactant) did not satisfy the specified value, the viscosity was too low to be applied, and the nonionic surfactant drips.

Since the mass of the component (C) of the first oxidative hair dye produced in Comparative Example 14 was smaller than the specified value, the viscosity was too low to be applied, and the hair dripping was dripping.
The first oxidative hair dye produced in Comparative Example 15 had a mass of the component (C) larger than the specified value, so that it was difficult for fingers to pass through during rinsing and had hardness after drying.

The first oxidative hair dye produced in Comparative Examples 16 to 21 had a mass ratio of coconut oil fatty acid monoethanolamide to a nonionic surfactant of HLB3 to 15 (coconut oil fatty acid monoethanolamide / HLB3 to 15). Since the nonionic surfactant) did not meet the specified value, the viscosity was too low to be applied, and the oil drips.

Claims (6)

4 to 12% by mass of the component (A) composed of monoethanolamine (MEA) and 2-amino-2-methyl-1-propanol (AMP),
Anionic surfactant (B) 2.5 to 7.5% by mass,
It contains 14 to 22% by mass of a nonionic surfactant (C) composed of a coconut oil fatty acid monoethanolamide and a nonionic surfactant of HLB 3 to 15 (excluding the coconut oil fatty acid monoethanolamide).
The mass ratio (AMP / MEA) of the monoethanolamine (MEA) to the 2-amino-2-methyl-1-propanol (AMP) is 0.5 to 14.
The mass ratio of the coconut oil fatty acid monoethanolamide to the nonionic surfactant of HLB3 to 15 (coconut oil fatty acid monoethanolamide / nonionic surfactant of HLB3 to 15) is 0.5 to 1.5. There is an oxidative hair dye first agent. The first oxidative hair dye according to claim 1, further comprising an amphoteric surfactant (D). The first oxidative hair dye according to claim 1 or 2, further comprising a cationized polymer (E). The first oxidative hair dye according to any one of claims 1 to 3, which is a transparent liquid. The first oxidative hair dye according to any one of claims 1 to 4, which has a pH of 9 to 13. The first oxidative hair dye according to any one of claims 1 to 5, which becomes a gel when the following test (I) is performed.
Test (I): 1 g of the first oxidative hair dye and 1 g of the second oxidative hair dye containing 2% by mass of hydrogen peroxide are mixed.