JP7103706B1 - Hair dyeing agent and hair dyeing method - Google Patents

Abstract

[Problem] To provide a hair dyeing agent and a hair dyeing method capable of vividly dyeing hair without damaging the hair, regardless of the type of dye. The present invention relates to N-acyl amino acid surfactants, an anionic surfactant whose acyl group is a cocoyl group, a nonionic surfactant which is an alkyl glucoside surfactant, and the present hair dye. contains a pH adjuster that adjusts the pH within the range of 4.0 to 6.0, a dye, and water. Further, the present invention comprises a first treatment step of applying a hair dye to the hair and leaving it for a predetermined time, a second treatment step of washing the hair after leaving, and a third treatment step of drying the hair after washing. and the hair dyeing agent is a hair dyeing method using the above. [Selection drawing] Fig. 1

Description

The present invention relates to a hair dyeing agent and a hair dyeing method.

In recent years, hair dyeing techniques have been developed with the permeation of hair coloring culture, and there is a demand in the market for hair dyeing agents (hair dyeing agents) that make the color of hair after dyeing clear. Therefore, various techniques related to hair dyeing have been conventionally proposed.

For example, Japanese Patent Application Laid-Open No. 2007-308427 (Patent Document 1) comprises a first agent containing an alkaline agent and a second agent containing an oxidizing agent, and the first agent and the second agent are described. Oxidized hair dye compositions used in combination are disclosed. In this oxidized hair dye composition, at least the following (a) is blended in the first agent, and at least the following (b) and (c) are blended in the first agent and / or the second agent. .. Further, in this oxidized hair dye composition, after mixing the first agent and the second agent, the pH is 8 to 11, and the amount of the following (b) is 0.5 to 20% by mass. (A) is paraaminophenol and 5-aminoortocresol and / or 5- (2-hydroxyethylamino) -2-methylphenol, and (b) has a branched structure and is liquid at room temperature. It is a higher alcohol that has an unsaturated bond with the higher alcohol and is liquid at room temperature, and (c) is a nonionic surfactant having an HLB of 9 to 20. As a result, an oxidative hair dye composition having high deep dyeing property while using an oxidative dye composed of paraaminophenol and 5-aminoorthocresol and / or 5- (2-hydroxyethylamino) -2-methylphenol. It is said that it is possible to improve the feel of the hair after dyeing.

Further, Japanese Patent Application Laid-Open No. 2008-56621 (Patent Document 2) describes components (A) direct dye, (B) hydrocarbon oil, (C) polyoxyalkylene-modified dimethylpolysiloxane having HLB7 or higher, and (D) fragrance. Disclosed is a one-part oil-in-water hair dye composition containing a group alcohol and having a mass ratio of component (B) to component (C) of (B) / (C) = 0.05 to 10. ing. The pH of this one-agent oil-in-water hair dye composition is determined from the viewpoint of uniformity of dyeing and suppression of irritation to the hand skin, for example, when an acid dye is used as the direct dye of the component (A). It is 2 to 5 when diluted 10 times by mass with water. As a result, the scalp and skin are less likely to be colored, the dyeability immediately after dyeing and the color persistence are excellent, the feel of the hair during rinsing and finishing is extremely good, and the odor is also good. ..

JP-A-2007-308427 Japanese Unexamined Patent Publication No. 2008-56621

Since hair is composed of proteins, it produces a positive charge and a negative charge, respectively, depending on the environment around the hair. Therefore, the dyeability of hair is greatly affected by the state of positive or negative charge of hair and the type of dye. For example, when a positive charge is generated on the hair, when an acid dye having a negative charge is applied to the hair, the negative charge of the acid dye is attached to the positive charge of the hair, and the hair is dyed vividly. Will be done. In addition, when a negative charge is generated on the hair, when a basic dye having a positive charge is applied to the hair, the positive charge of the basic dye adheres to the negative charge of the hair and the hair becomes clear. Is dyed in. As described above, the state of charge of hair is extremely important in selecting a dye.

Here, in the technique described in Patent Document 1, an oxidative dye is used for hair in a basic environment. Further, in the technique described in Patent Document 2, an acid dye is used for hair in an acidic environment. Therefore, the technique described in Patent Document 1-2 has a problem that it cannot be applied to a basic dye.

Therefore, the present invention has been made to solve the above problems, and a hair dyeing agent and a hair dyeing agent capable of vividly dyeing any kind of dye without damaging the hair. The purpose is to provide a method.

The hair dye according to the present invention is an N-acylamino acid-based surfactant, which is an anionic surfactant having a cocoyl group as an acyl group, a nonionic surfactant as an alkyl glucoside surfactant, and a real hair dye. It contains a pH adjuster that adjusts the pH of the agent in the range of 4.0 to 6.0, a dye, and water.

The hair dyeing method according to the present invention includes a first treatment step of applying a hair dye to the hair and leaving it for a predetermined time, a second treatment step of washing the hair after leaving it with water, and drying the hair after washing with water. It is provided with a third processing step for making the hair. The hair dye has an anionic surfactant of an acylamino acid-based surfactant having an acyl group as a cocoyl group, a nonionic surfactant of an alkyl glucoside, and a pH of the real hair dye, which corresponds to the isoelectric point of the hair. It contains a pH adjuster for adjusting in the range of 4.0 to 6.0, a dye, and water.

According to the present invention, any kind of dye can be dyed vividly without damaging the hair.

It is a table of each component of the hair dyeing agent of Examples 1 to 3 and Comparative Examples 1 and 2, and the evaluation result. It is a table of each component of the hair dye of Example 3 and Comparative Examples 3 to 6 and the evaluation result. It is a table of each component of the hair dye of Example 3 and Comparative Examples 7 to 10 and the evaluation result. It is a table of each component of the hair dye of Examples 3 to 7 and the evaluation result. It is a table of each component of the hair dyeing agent of Examples 3, 8 to 11 and the evaluation result. It is a table of each component of the hair dyeing agent of Examples 3, 12 to 15 and the evaluation result. It is a table of each component of the hair dyeing agent of Examples 3, 16 to 19 and the evaluation result. It is a table of each component of the hair dye of Examples 3, 20 and 21 and Comparative Examples 11 and 12 and the evaluation result. It is a photograph which shows the example of the hair dyeing agent of evaluation of "⊚" and the example of the hair dyeing agent of evaluation of "x" in the dyeability.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings for the purpose of understanding the present invention. It should be noted that the following embodiment is an example embodying the present invention and does not limit the technical scope of the present invention.

Hair is composed of a three-layer structure consisting mainly of a protein called keratin, with the outermost layer being cuticle (hair follicles), the middle layer being cortex (fur), and the central layer being medula (hair medulla). There is.

Here, when the hair is exposed to a basic environment with a high pH, the cuticle of the hair is damaged and relaxed by the basic solution, the basic solution enters the hair, and the proteins constituting the hair are basic. It is known that it dissolves in a solution and elutes to the outside. On the other hand, it is known that when hair is exposed to an acidic environment with low pH, the cuticle of hair is damaged and contracted by the acidic solution, and the hydrolysis of protein is promoted by a chemical reaction with the acidic solution. Has been done. In this way, damage to the cuticle of the hair is promoted in both basic and acidic environments, and the damage to the cuticle causes damage to the cortex in the middle layer, leading to cavitation inside the hair, and the hair fiber itself. Cuts, dryness, and split ends.

On the other hand, the charges of the side chains, amino ends, and carboxyl ends of the amino acids that make up the protein change depending on the pH conditions of the external environment, but the amino ends are positively charged and the carboxyl ends are negatively charged. Due to its properties, proteins have a specific pH in which the positive and negative charges are equal and the overall charge is lost (zero charge), and that specific pH is called the isoelectric point. It has been. Since the hair is also composed of protein, the isoelectric point exists, and the isoelectric point of the hair is in the range of 4.5 to 5.5.

Here, when the hair is exposed to a solution of the isoelectric point of the hair, the positive charge and the negative charge of the hair become equal to each other, so that the above-mentioned damage to the cuticle of the hair can be suppressed.

On the other hand, even if an acidic dye having a negative charge or a basic dye having a positive charge is applied to the hair when the charge of the hair is zero, the acidic dye or the basic dye is attracted to the hair. Since there is no charge, the dyeability of the hair is significantly deteriorated, and clear dyeing cannot be performed.

Here, the relationship between the dye, the pH, and the hair will be specifically described. For example, in an acidic environment with a low pH in which a positive charge is generated in the hair, an acidic dye having a negative charge is strongly attracted to the hair. , Allows for vivid dyeing, but on the other hand promotes the hydrolysis of hair cuticles. Further, in a high pH basic environment in which a negative charge is generated on the hair, a basic dye having a positive charge is strongly attracted to the hair, and clear dyeing becomes possible, but on the other hand, the hair Elution of protein is promoted. That is, by changing the pH environment around the hair, even if the dyeability of the hair is improved, the damage to the cuticle of the hair is promoted.

Furthermore, regardless of the type of dye such as acid dye or basic dye, if the pH is too low, the decomposition of the dye itself is promoted, and if the pH is too high, the dye itself becomes unstable and the hair is dyeable. Is lost. Therefore, in an environment of extreme pH, the dye itself cannot be expected to be dyeable as well as damage to the cuticle of the hair.

In this way, when the pH of the hair dye is brought close to the isoelectric point of the hair in order to prevent damage to the hair, the damage to the hair is suppressed, but the dyeability of the hair itself deteriorates, while the hair is dyed. When the pH of the dyeing agent is brought close to the pH at which the dyeing property of the dye works effectively, the dyeing property of the hair is improved, but the hair is damaged, which is a contradictory state.

The present inventor has been diligently researching hair dyes for many years, and by constructing the following components, surprisingly, it can be applied to any kind of dye, without damaging the hair. Moreover, it was discovered that the dyeability was improved, and the present invention was completed based on the examples described later.

That is, the hair dye according to the present invention has an anionic surfactant of an acylamino acid-based surfactant having an acyl group as a cocoyl group, a nonionic surfactant of an alkyl glucoside, and a pH of the real hair dye. It contains a pH adjuster that adjusts to the range of 4.0 to 6.0 corresponding to the isoelectric point, water, and a dye. This makes it possible to dye any kind of dye vividly without damaging the hair.

That is, in the present invention, since the pH of the hair dye is set to the isoelectric point of the hair by the pH adjuster, even if the real hair dye is exposed to the hair, the cuticle of the hair is hydrolyzed and the protein of the hair is eluted. Therefore, it is possible to reliably suppress damage to the cuticle of the hair.

Here, in the present invention, in order to efficiently adsorb (dye) hair and dye in an environment of pH corresponding to the isoelectric point of hair, a specific anionic surfactant and a specific nonionic surfactant are used. Use in combination with the agent.

As a specific anionic surfactant, an acylamino acid-based surfactant in which the acyl group is a cocoyl group is adopted. Amino acid-based surfactants are surfactants composed of acyl groups (fatty acid residues) and amino acids, and are generally weakly irritating to the skin and weak in detergency (defatting power). It is an ingredient.

Further, as the specific anionic surfactant, a cocoyl group is adopted as the acyl group among the acyl amino acid-based surfactants. The coconut group is an acyl group (a component derived from coconut oil) derived from a coconut oil fatty acid, has a strong lipophilicity as compared with other acyl groups, and has a specific adsorptive power for hair and dyes.

In addition, certain nonionic surfactants employ alkyl glucosides. The alkyl glucoside is a nonionic surfactant in which a sugar and a higher alcohol are glycosidic bonded, and is generally weak in irritation to the skin and the like, has excellent detergency, and has good compatibility with other surfactants.

In the present invention, when these two specific anionic surfactants and a specific nonionic surfactant are used in combination, the dye can be strongly adsorbed on the hair even when the electric charge of the hair is zero. First, a particular anionic surfactant captures the dye because of its chemical skeletal structure specificity. In particular, since dyes often have hydrophobic groups that are larger in size than ordinary molecules, the lipophilicity of a particular anionic surfactant attracts the hydrophobic groups of the dye and captures the dye well. do. Further, the specific anionic surfactant exhibits lipophilicity even for hair in a state of zero charge, is attracted to the hair and is adsorbed on the hair, and also adsorbs the dye on the hair. As a result, the specific anionic surfactant functions as a bridge for efficiently adsorbing the hair and the dye, and the dyeability can be obtained even when the electric charge of the hair is zero.

Here, since sufficient dyeability cannot be obtained only by adsorbing the dye on the hair, by using a specific nonionic surfactant in combination, the dye attracted by the specific anionic surfactant to the hair can be obtained. Infiltrate the inside of the hair. As a result, the dyeability of the hair can be improved by dyeing the inside of the hair with the dye.

Due to these comprehensive effects, the present invention makes it possible to dye any kind of dye vividly without damaging the hair.

Here, the type of amino acid of the acyl amino acid-based surfactant is not particularly limited, and examples thereof include alanine, glycine, glutamic acid, N-methylglycine, and taurine. For example, cocoyl alanine, cocoyl glycine, cocoyl glutamic acid, cocoyl sarcosine, cocoyl methyl taurine taurine and salts thereof can be mentioned. Examples of the salt include metal salts such as sodium salt, potassium salt, lithium salt, magnesium salt and calcium salt, ammonium salt, amine salt, basic amino acid salt, choline salt and the like. Specifically, cocoyl alanine Na, cocoyl alanine K, cocoyl alanine TEA (triethanolamine), cocoyl glycine K, cocoyl glutamic acid Na, cocoyl glutamic acid 2Na, cocoyl glutamic acid K, cocoyl glutamic acid TEA, cocoyl sarcosine Na, cocoyl methyl taurine Na. And so on. Here, the acylamino acid-based surfactant may be one kind or a combination of two or more kinds.

The concentration of the specific anionic surfactant is not particularly limited, but is preferably in the range of 1.0% by weight to 30.0% by weight with respect to the whole hair dye, for example, as a whole hair treatment agent. On the other hand, it is more preferably in the range of 3.0% by weight to 15.0% by weight. This makes it possible to promote adsorption to the hair and capture of the dye. The concentration of the acyl amino acid-based surfactant means a substantially effective concentration of the acyl amino acid-based surfactant. For example, a raw material containing 1/3 of the concentration of the amino acid-based surfactant is used as a whole hair dye. When 9.0% by weight is added, the concentration of the amino acid-based surfactant is calculated by taking 9.0 × 1/3 = 3.0% by weight as a substantially effective concentration.

The type of alkyl glucoside of a specific nonionic surfactant is not particularly limited, but for example, octyl glucoside, nonyl glucoside, decyl glucoside, undecyl glucoside, dodecyl glucoside (lauryl glucoside), tridecyl glucoside, myristyl glucoside, penta. Examples thereof include decyl glucoside, (caprylyl / capryl) glucoside, palmityl glucoside, cetostearyl glucoside, alkyl (8-16) glucoside and the like. Here, the number of carbon atoms of the alkyl group of the alkyl glucoside is not particularly limited, but for example, it is preferably in the range of 8 or more and 18 or less, and more preferably in the range of 8 or more and 16 or less. The alkyl (8 to 16) glucoside is mainly obtained by a condensation reaction between an alcohol having an alkyl group having 8 to 16 carbon atoms and glucose. As a result, the penetration of the dye into the hair can be strengthened and the dyeability of the hair can be improved. The alkyl glucoside may be one kind or a combination of two or more kinds.

The concentration of the specific nonionic surfactant is not particularly limited, but is preferably in the range of 0.1% by weight to 10.0% by weight with respect to the total hair dye, for example, as a total hair treatment agent. On the other hand, it is more preferably in the range of 0.5% by weight to 5.0% by weight. This makes it possible to improve the penetration of the dye into the hair. The concentration of the specific nonionic surfactant means a substantially effective concentration of the specific nonionic surfactant, as described above, and for example, the concentration of the specific nonionic surfactant is contained in 1/5. When the raw material was added in an amount of 2.5% by weight based on the total hair dye, the concentration of the specific nonionic surfactant was 2.5 × 1/5 = 0.5% by weight, which was a substantially effective concentration. Calculated.

The ratio of the concentration of the specific nonionic surfactant to the concentration of the specific anionic surfactant is not particularly limited, but is preferably in the range of 1.0: 0.3 to 30.0, for example. It is more preferably in the range of 1.0: 0.6 to 20.0. This makes it possible to perform dyeing of the hair and the dye and permeation of the dye into the hair in a well-balanced manner.

The pH adjusted by the pH adjuster is not particularly limited as long as it is in the range of 4.0 to 6.0, but for example, it is in the range of 4.5 to 5.5, which is closer to the isoelectric point of the hair. It is more preferable to use the inside. This makes it possible to bring the pH closer to the isoelectric point of the hair, and it is possible to reliably suppress damage to the cuticle of the hair. Further, the concentration of the pH adjusting agent is not particularly limited, and for example, an appropriate amount can be added so as to be within the above-mentioned pH range.

The type of pH adjuster is not particularly limited, but for example, citric acid, malic acid, lactic acid, phosphoric acid, sodium hydroxide, sodium citrate, arginine, organic acid, boric acid, 2-amino-2-methyl. -1-propanol, borosand, potassium hydrogen phosphate, triethanolamine, monoethanolamine and the like can be mentioned. Further, the pH adjuster may be one kind or a combination of two or more kinds.

The type of dye is not particularly limited, and examples thereof include acid dyes, basic dyes, HC dyes, anthraquinone dyes, and oil-soluble dyes.

Here, the type of the acidic dye is not particularly limited, but for example, Red No. 2, Red No. 3, Red No. 102, Red No. 104, Red No. 105, Red No. 106, Red No. 201, Red No. 227, Red No. 230. No., Red No. 232, Red No. 401, Red No. 502, Red No. 503, Red No. 504, Red No. 506, Orange No. 205, Orange No. 206, Orange No. 207, Yellow No. 4, Yellow No. 5, Yellow No. 202, Yellow 203, Yellow 402, Yellow 403, Yellow 406, Yellow 407, Green 3, Green 201, Green 204, Green 205, Green 401, Green 402, Blue 1, Blue 2 No., Blue 202, Blue 205, Purple 401, Black 401, Acid Blue 1, Acid Blue 3, Acid Blue 62, Acid Black 52, Acid Brown 13, Acid Green 50, Acid Orange 6, Acid Red 14, Acid Red 35, Acid Red 73, Acid Red 184, Brilliant Black 1 and the like can be mentioned.

The type of basic dye is not particularly limited, but for example, basic blue 3 (basic blue 3), basic blue 7 (basic blue 7), basic blue 9 (basic blue 9), and basic blue 26 (Basic Blue 26), Basic Blue 75 (Basic Blue 75), Basic Blue 77 (Basic Blue 77), Basic Blue 99 (Basic Blue 99), Basic Blue 124 (Basic Blue 124), Basic Red 51 (Basic Red 51), Basic Red 76 (Basic Red 76), Basic Yellow 57 (Basic Yellow 57), Basic Purple 2 (Basic Violet 2), Basic Tea 16 (Basic Brown 16), or Basic Tea 17 (basic brown 17) and the like can be mentioned.

The type of HC dye is not particularly limited, but for example, HC blue 2, HC blue 5, HC blue 11, HC blue 12, HC blue 13, HC red 1, HC red 13, HC orange 1, and HC yellow 2. , HC yellow 4, HC purple 1, and the like.

The type of anthraquinone dye is not particularly limited, and examples thereof include 1-amino-4-methylaminoanthraquinone and 1,4-diaminoanthraquinone. The type of oil-soluble dye is not particularly limited, but for example, red 215, red 218, red 225, orange 201, orange 206, yellow 201, yellow 204, green 202, and purple 201. No., Red No. 501, Red No. 505, Orange No. 403, Yellow No. 404, Yellow No. 405, Blue No. 403 and the like can be mentioned. In addition, these dyes may be one kind or a combination of two or more kinds.

The concentration of the dye is not particularly limited, but is preferably in the range of 0.01% by weight to 5.0% by weight with respect to the total hair dyeing agent, and 0.10 with respect to the total hair treating agent. It is more preferably in the range of% by weight to 1.00% by weight.

The type of water is not particularly limited, and examples thereof include purified water and ion-exchanged water. Water is added as a residue other than the components of the above-mentioned anionic surfactant, nonionic surfactant, pH adjuster, and dye.

Further, the hair dye according to the present invention may contain a cationic surfactant having weak cationic properties (hereinafter referred to as a weak cationic surfactant) as long as the object of the present invention is not impaired. .. By adding a weak cationic surfactant, it is possible to promote the immobilization of the dye inside the hair and obtain a conditioning effect.

Here, the type of the weakly cationic surfactant is not particularly limited, and examples thereof include a cellulose derivative to which a cationic group is added (cationized cellulose). Examples of the cationic group include dimethyldiallylammonium and 2-hydroxy-3 (trimethylammonio) propyl. The cationized cellulose is, for example, polyquaternium-10 {O- [2-hydroxy-3- (trimethylammonio) propyl] hydroxyethyl cellulose}, polyquaternium-4, polyquaternium-5, polyquaternium-6, polyquaternium-7, polyquaternium-. 14, Polyquaternium-15, Polyquaternium-22, Polyquaternium-24, Polyquaternium-28, Polyquaternium-32, Polyquaternium-33, Polyquaternium-36, Polyquaternium-37, Polyquaternium-39, Polyquaternium-45, Polyquaternium-47, Hydroxyethylcellulose Examples thereof include ammonium chloride and derivatives thereof. In addition, these weak cationic surfactants may be one kind or a combination of two or more kinds.

The weak cationic surfactant is preferably in the range of 0.01% by mass to 6.00% by mass with respect to the total hair treatment agent, and 0.20% by weight to 2.20% by weight with respect to the total hair treatment agent. It is more preferably in the range of 00% by weight.

Further, the hair dye according to the present invention may contain a chelating agent as long as the object of the present invention is not impaired. By adding a chelating agent, metal ions contained in water can be inactivated in advance, and the permeation of the dye into the hair can be promoted by the combined use of a specific anionic surfactant and a specific nonionic surfactant. You can.

Here, the type of chelating agent is not particularly limited, and for example, pentetoate (diethylenetriamine pentaacetate), edetate (ethylenediamine tetraacetate), hydroxyethylethylenediamine triacetate, phytic acid, phosphonic acid and the like. Salts such as sodium salts, sodium oxalate, polyaspartic acid, polypolyamino acids, sodium polyphosphate, sodium metaphosphate, phosphoric acid, citric acid, sodium citrate, malic acid, fruit acid, alanine, dihydroxyethylglycine, gluconic acid , Ascorbic acid, succinic acid, tartrate acid and the like. Examples of the pentetate include pentetic acid 5Na and the like. Examples of the edetate include EDTA, EDTA2Na, EDTA3Na, EDTA4Na and the like. Examples of the hydroxyethylethylenediamine triacetate include HEDTA3Na and the like. Examples of the phosphonic acid include etidronic acid and the like. Examples of polypolyamino acids include polyglutamic acid and the like. In addition, these chelating agents may be one kind or a combination of two or more kinds.

The concentration of the chelating agent is preferably in the range of 0.01% by mass to 6.00% by mass with respect to the total hair dyeing agent, and 0.20% by weight to 2.00% by weight with respect to the total hair dyeing agent. It is more preferably in the range of% by weight.

In addition to the above-mentioned components, the hair dye according to the present invention is, for example, an anionic surfactant, an amphoteric surfactant, a nonionic surfactant, and a cationic surfactant, as long as the object of the present invention is not impaired. Other ingredients such as surfactants, preservatives, thickeners, antioxidants, fragrances, amino acids and their derivatives, proteins and their derivatives, vitamins, UV inhibitors, oils, higher alcohols, polymer compounds, etc. Can include.

The form of the hair dye according to the present invention is not particularly limited, and for example, it may be in the form of liquid, milk, cream, gel, foam (form when used), atomized (form when used), or the like. The aerosol form and the like can be mentioned.

Further, the method for producing the hair dye according to the present invention is not particularly limited, and for example, a method of blending and mixing the above-mentioned components of the hair dye can be adopted.

Further, the hair dyeing method according to the present invention includes a first treatment step of applying a hair dye to the hair and leaving it for a predetermined time, a second treatment step of washing the hair after leaving it with water, and a hair after washing with water. A third processing step of drying the hair is provided. The hair dye has an anionic surfactant of an acylamino acid-based surfactant having an acyl group as a cocoyl group, a nonionic surfactant of an alkyl glucoside, and a pH of the real hair dye, which corresponds to the isoelectric point of the hair. It contains a pH adjuster for adjusting in the range of 4.0 to 6.0, a dye, and water. Even with this configuration, the same effects as those of the present invention can be obtained.

Here, the coating method and the leaving method in the first treatment step are not particularly limited. Further, the washing method in the second treatment step is not particularly limited, and the drying method in the third treatment step is not particularly limited.

Further, in the hair dyeing method according to the present invention, other treatment steps may be added as appropriate in addition to the above-mentioned first treatment step, second treatment step and third treatment step. Examples of other treatment steps include a curl treatment step of curling the hair, a hair iron treatment step of applying a hair iron to the hair, and the like.

In addition to hair coloring, the hair dyeing agent and hair dyeing method according to the present invention can be used in combination with any hair deformation treatment method such as permanent wave treatment and straightening treatment.

Hereinafter, examples, comparative examples, and the like in the present invention will be specifically described, but the application of the present invention is not limited to the present examples and the like.

(Manufacturing of hair dye)
As shown in the tables of FIGS. 1 to 8, each component was blended to produce hair dyes of Examples and Comparative Examples. The numerical values in the table indicate the concentration (% by weight).

As shown in FIG. 1, in Example 1, the anionic surfactant was cocoylalanine TEA, the nonionic surfactant was lauryl glucoside, the pH was adjusted to 5.0, and the dye was purple 401, an acid dye. In Example 2, the weak cationic surfactant Polyquaternium-10 was added in Example 1, and in Example 3, the chelating agent pentatic acid 5Na was added in Example 2. In Examples 1 to 3, the concentration of the anionic surfactant was 10.0% by weight, the concentration of the nonionic surfactant was 5.0% by weight, the concentration of the nonionic surfactant and the concentration of the anionic surfactant. The ratio with and is 1: 2. On the other hand, Comparative Example 1 was a hair dye when no nonionic surfactant was used in Example 1, and Comparative Example 2 was a hair dye when no anionic surfactant was used in Example 1.

As shown in FIG. 2, Comparative Example 3 changed the anionic surfactant to lauroylmethylalanine TEA in Example 3, and Comparative Example 4 changed the anionic surfactant to Na stearoyl glutamate in Example 3. In Comparative Example 5, the anionic surfactant was changed to myristylmethylalanine Na in Example 3, and in Comparative Example 6, the anionic surfactant was changed to olefin (C14-16) sodium sulfonate in Example 3.

As shown in FIG. 3, in Comparative Example 7, the anionic surfactant was changed to Na laureth sulfate in Example 3, and in Comparative Example 8, the anionic surfactant was changed to the amphoteric surfactant cocamidopropyl in Example 3. In Comparative Example 9, the anionic surfactant was changed to the amphoteric surfactant lauramidepropyl betaine in Example 3, and in Comparative Example 10, the anionic surfactant was changed to the amphoteric surfactant in Example 3. It was changed to Na cocoamphopropionate.

As shown in FIG. 4, in Example 4, the anionic surfactant was changed to cocoylalanine Na in Example 3, and in Example 5, the anionic surfactant was changed to sarcosine glycine K in Example 3. In Example 6, the anionic surfactant was changed to cocoyl sarcosine Na in Example 3, and in Example 7, the anionic surfactant was changed to cocoyl methyl taurine Na in Example 3.

As shown in FIG. 5, Example 8 changed the nonionic surfactant to octyl glucoside in Example 3, and Example 9 changed the anionic surfactant to myristyl glucoside in Example 3. In Example 3, the anionic surfactant was changed to cetostearyl glucoside, and in Example 11, the anionic surfactant was changed to alkyl (8-16) glucoside in Example 3.

As shown in FIG. 6, in Example 12, the concentration of the anionic surfactant in Example 3 was 3.0% by weight, and the ratio of the concentration of the nonionic surfactant to the concentration of the anionic surfactant was 1: 1. It is 0.6. In Example 13, the concentration of the anionic surfactant in Example 3 was 15.0% by weight, and the ratio of the concentration of the nonionic surfactant to the concentration of the anionic surfactant was 1: 3. In Example 14, the concentration of the nonionic surfactant in Example 3 was 0.5% by weight, and the ratio of the concentration of the nonionic surfactant to the concentration of the anionic surfactant was 1:20. In Example 15, the concentration of the anionic surfactant was 3.0% by weight, the concentration of the nonionic surfactant was 0.5% by weight, the concentration of the nonionic surfactant and the concentration of the anionic surfactant in Example 3. The ratio with and is 1: 6.

As shown in FIG. 7, in Example 16, the dye was changed to the basic dye blue 124 in Example 3, and in Example 17, the dye was changed to the basic dye brown 17 in Example 3. In Example 18, the dye was changed to the basic dye purple 2 in Example 3, and in Example 19, the dye was changed to the HC dye HC Yellow 4 in Example 3.

As shown in FIG. 8, in Example 20, the concentration of the anionic surfactant was 1.0% by weight, the concentration of the nonionic surfactant was 0.1% by weight, and the concentration of the nonionic surfactant in Example 3. The ratio of to the concentration of the anionic surfactant is 1:10. In Example 21, the concentration of the anionic surfactant was 30.0% by weight, the concentration of the nonionic surfactant was 10.0% by weight, the concentration of the nonionic surfactant and the concentration of the anionic surfactant in Example 3. The ratio with and is 1: 3. Comparative Example 11 adjusted the pH to 3.0 in Example 3, and Comparative Example 12 adjusted the pH to 7.0 in Example 3.

(Hair dyeing method)
A hair dye (Example or Comparative Example) is applied to a hair bundle (white hair bundle}, left for a predetermined time (for example, several minutes to several tens of minutes), washed with water after being left, and then the hair after washing with water. The bundle was dried with a dryer. The dried hair bundle was evaluated by the following evaluation method.

(Evaluation method)
The evaluation items are (1) dyeability and (2) feel shown below.

(1) Stainability Measure the chromaticity (L * value, a * value, b * value) of the hair bundle before and after the hair dyeing method with a commercially available color difference meter, and visually check the chromaticity value and the following evaluation criteria. Evaluated according to. Evaluations of "◎" and "○" are acceptable as products. The smaller the chromaticity value, the deeper the color is dyed.

<Criteria>
⊚: The chromaticity is extremely low in all three types and the appearance is also deeply dyed. ○: The chromaticity is low in all three types and the appearance is also dyed to some extent. , The appearance is also dyed to some extent ×: The chromaticity is high in all three types, and the appearance is not dyed.

In addition, FIG. 9 is a photograph showing an example of a hair dyeing agent evaluated as "⊚" and an example of a hair dyeing agent evaluated as "x" in terms of dyeability.

(2) Feel The hair bundles before and after the hair dyeing method were touched by hand to confirm the degree of damage to the hair, and the hair was evaluated according to the following evaluation criteria based on the feel of the hair. Evaluations of "◎" and "○" are acceptable as products.

<Criteria>
⊚: Hair is not damaged at all and feels good ○: Hair is not damaged and feels good △: Some parts of hair are damaged, but feel is good overall ×: Hair is damaged and feels bad

(Evaluation results)
As shown in FIG. 1, in Comparative Example 1 which does not contain a specific nonionic surfactant and Comparative Example 2 which does not contain a specific anionic surfactant, the pH is 5.0, so that the “feel” of (2) is Although the evaluation result was "⊚", the evaluation result of "dyeability" in (1) was "Δ" or "x", and the product was rejected. On the other hand, in Examples 1 to 3, the evaluation results of (1) "dyeability" and (2) "feel" were "⊚", respectively, and the product was acceptable.

As shown in FIG. 2, in Comparative Examples 3 to 6 in which the anionic surfactant was changed to lauroylmethylalanine TEA, stearoyl glutamate Na, myristylmethylalanine Na, and olefin (C14 to 16) sulfonate Na, respectively, (2). Although the evaluation result of "feel" in) was "◎", the evaluation result of "dyeability" in (1) was "Δ" or "x", and the product was rejected.

As shown in FIG. 3, Comparative Example 7 in which the anionic surfactant was changed to sodium laureth sulfate and the amphoteric surfactants cocamidopropyl betaine, lauramidopropyl betaine and Na cocoamphopropionate were used as the anionic surfactants, respectively. In Comparative Examples 8 to 10 changed to, the evaluation result of "feel" in (2) was "◎", but the evaluation result of "dyeability" in (1) was "x", and the product was rejected. Met.

As shown in FIG. 4, in Examples 4 to 7, in which the anionic surfactant was changed to cocoylalanine Na, cocoylglycine K, cocoyl sarcosine Na, and cocoyl methyl taurine Na, respectively, the “stainability” of (1) was used. The evaluation results of "feel" in (2) were "◎", respectively, and the product was accepted.

As shown in FIG. 5, in Examples 8 to 11 in which the nonionic surfactant was changed to octyl glucoside, myristyl glucoside, cetostearyl glucoside and alkyl (8 to 16) glucoside, respectively, the “stainability” of (1) was observed. The evaluation results of "feel" in (2) and (2) were "◎", respectively, and the product was accepted.

As shown in FIG. 6, the concentration of the anionic surfactant was changed from 3.0% by weight to 15.0% by weight, and the concentration of the nonionic surfactant was changed from 0.5% by weight to 5.0% by weight. In Examples 12 to 15 in which the ratio of the concentration of the nonionic surfactant to the concentration of the anionic surfactant was changed to 1: 0.6 to 20.0, the "stainability" of (1) and (2) The evaluation result of "feel" was "◎" respectively, and it was passed as a product.

As shown in FIG. 7, in Examples 16 to 19 in which the dyes were changed to the basic dye blue 124, the basic dye brown 17, the basic dye purple 2 and the HC dye HC yellow 4, respectively, ( The evaluation results of "dyeability" in 1) and "feel" in (2) were "◎", respectively, and the product was accepted.

As shown in FIG. 8, the concentration of the anionic surfactant was changed to 1.0% by weight and 30.0% by weight, and the concentration of the nonionic surfactant was changed to 0.1% by weight and 10.0% by weight. In Examples 20 to 21, the evaluation results of (1) "stainability" and (2) "feel" were "○" or "◎", and the product was acceptable. On the other hand, in Comparative Examples 10 and 11 in which the pH was changed to 3.0 and 7.0, respectively, the evaluation results of "dyeability" in (1) and "feel" in (2) were "Δ" or "x". It was rejected as a product.

In the examples and comparative examples of the present invention, the hair dyeing treatment with a hair dyeing agent was applied to a single substance, but in addition to this, the same effect can be obtained by combining with a straightening treatment or a straightening treatment for hair. I guess it will play.

As described above, the hair dyeing agent and the hair dyeing method according to the present invention are used not only for hair dyeing treatment (hair coloring treatment) but also for hair straightening treatment, curly hair straightening treatment, permanent wave treatment and the like. It is useful as a dyeing agent and a hair dyeing method, and is effective as a hair dyeing agent and a hair dyeing method capable of vividly dyeing any kind of dye without damaging the hair.

Claims (4)

With one or more acyl amino acid-based surfactants selected from cocoyl alanine, cocoyl glycine, cocoyl sarcosine, cocoyl methyl taurine and salts thereof ,
Alkyl glucoside and
A pH adjuster that adjusts the pH of the real hair dye within the range of 4.0 to 6.0 corresponding to the isoelectric point of the hair, and
water and,
With dyes
A hair dye containing a pH of 4.0 to 6.0 . The concentration of the acyl amino acid-based surfactant is in the range of 1.0% by weight to 30.0% by weight with respect to the whole hair dyeing agent.
The concentration of the alkyl glucoside is in the range of 0.1% by weight to 10.0% by weight with respect to the whole hair dye.
The hair dye according to claim 1. The ratio of the concentration of the alkyl glucoside to the concentration of the acyl amino acid-based surfactant is in the range of 1.0: 0.3 to 30.0.
The hair dye according to claim 1 or 2. The first treatment step of applying a hair dye to the hair and leaving it for a predetermined time,
The second treatment process to wash the hair after leaving it with water,
The third treatment process to dry the hair after washing with water,
With
The hair dye is
With one or more acyl amino acid-based surfactants selected from cocoyl alanine, cocoyl glycine, cocoyl sarcosine, cocoyl methyl taurine and salts thereof ,
Alkyl glucoside and
A pH adjuster that adjusts the pH of the real hair dye within the range of 4.0 to 6.0 corresponding to the isoelectric point of the hair, and
With dyes
water and,
The pH is 4.0 to 6.0 .
Hair dyeing method.

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