JPH1171248A - Hair-dyeing agent and hair-dyeing using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a two-pack type hair-dyeing agent that has excellent dyeing properties, stability and color fastness with reduced skin staining and a method of dyeing hair using the same. SOLUTION: This hair-dyeing agent comprises the first agent of which pH is adjusted to 1.5-5 and the second agent that contains an acidic dye and is adjusted its pH to 1.5-4 where at least one contains a thickener. This hair-dyeing method comprises the first step where the first agent is applied to the hair and the second step where the second agent is coated on the hair where the first step is followed to the second step thereby dyeing the hair.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hair dye containing an acid dye and a hair dyeing method using the same.
It has excellent dyeing properties and stability and good color durability.
The present invention relates to a two-part hair dye that causes less stain on the skin and a hair dyeing method using the same.

[0002]

2. Description of the Related Art Conventionally, an oxidative hair dye using an oxidative dye such as paraphenylenediamine has been widely used as a hair dye for hair. Oxidative hair dyes are excellent in dyeing properties and fastness, but have problems such as sensitization of oxidation dyes and damage to skin and hair due to treatment under strong alkaline conditions.

[0003] For this reason, the development of acid hair dyes using acid dyes having less of the above problems has been promoted. Acid hair dyes are generally acid dyes, organic solvents such as aromatic alcohols,
It contains an acid for pH adjustment as a main component, and a thickener is blended with the acid for preventing dripping from hair during use. These acidic hair dyes are usually of a single-drug type, but may be first used when used as described in Japanese Patent Publication No. 2-32254.
There is also a two-part type acidic hair dye and the like which is used by mixing an agent and a second part. In addition, as a two-part hair dye, a technique described in, for example, JP-A-7-109211 has been proposed.

[0004]

However, the conventional one-part type acidic hair dye has a low hair dyeing power, and may be stained on the skin during hair dyeing, and it is difficult to remove the stain. However, it was not always satisfactory. Further, even in the conventional two-pack type, it has not yet been possible to sufficiently solve the above-mentioned problems such as the removal of contamination.

[0005] The present invention has been made in view of the above circumstances, and provides a hair dye and a hair dyeing method using the same, which are excellent in hair dyeing power, high in safety and less stained during treatment. The purpose is to do.

[0006]

Means for Solving the Problems The present invention provides a method for measuring the pH
It comprises a first agent adjusted to 1.5 to 4 and a second agent adjusted to pH 1.5 to 4 containing an acid dye, and a thickener is added to at least one of the first agent and the second agent. The present invention relates to a hair dye comprising:

[0007] The present invention also relates to a first hair dye using the above hair dye.
A first step of applying the agent to the hair and a second step of applying the second agent to the hair, and dyeing the hair by performing the second step after the first step. The present invention relates to a method for coloring hair.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.

The hair dye of the present invention comprises a first agent and a second agent, wherein the first agent is adjusted to pH 1.5 to 4, the second agent contains an acid dye and has a pH of 1.5. Adjusted to ~ 4. And the thickener is contained in at least one of the first agent and the second agent. Further, as a preferred embodiment, at least one of the first agent and the second agent contains an organic solvent.

[0010] Both the first and second agents have a pH of 1.5 to 4
Has been adjusted. Both the first and second agents are preferably p
H2 to 3.5. Organic acids, inorganic acids, and the like are preferably used as a pH adjuster for adjusting the pH to the above range. As the organic acid used in the present invention, for example,
Citric acid, acetic acid, glycolic acid, formic acid, levulinic acid, oxalic acid, lactic acid, tartaric acid, lactic acid, succinic acid, malic acid, L
-Glutamic acid, L-aspartic acid, pyrrolidonecarboxylic acid and the like. As the inorganic acid, for example, hydrochloric acid,
Phosphoric acid and the like. One or more of these pH adjusters represented by organic acids and inorganic acids can be used.

Examples of the organic solvent include aliphatic alcohols having low solubility in water, such as n-butyl alcohol, sec-butyl alcohol, cyclohexane, butyl cellosolve, benzyl alcohol, 2-phenoxyethanol and phenylethanol; benzyl alcohol, 2-phenoxyethanol , Aromatic alcohols such as phenylethanol; cyclic ketones and ethers such as tetrahydrofurfuryl alcohol, N-methylpyrrolidone and ethylene carbonate; glycerin, propylene glycol, 1,3-butylene glycol, dipropylene glycol, sorbitol, xylitol, Ethylene glycol, diethylene glycol, diglycerin, polyethylene glycol, polyglycerin, ethylene glycol monoethyl ether, diethylene glycol Polyhydric alcohols such as monoethyl ether and ethylene glycol dimethyl ether; lower alcohols such as ethanol, butanol, propanol and isopropanol; 2-ethylhexyl alcohol, 2-hexyldecyl alcohol, 2-decyltetradecyl alcohol, isostearyl alcohol and cetostearyl Alcohol, lauryl alcohol, oleyl alcohol, myristyl alcohol, cetyl alcohol,
And higher alcohols such as stearyl alcohol and behenyl alcohol. One or more of these organic solvents can be used.

Among these, benzyl alcohol, 2-
Aromatic alcohols such as phenoxy alcohol are preferably used.

Further, it is more preferable to use the aromatic alcohol and one or more selected from lower alcohols, polyhydric alcohols and higher alcohols as the organic solvent.

These organic solvents are preferably a first agent,
Particularly, the first agent is contained in at least one of the second agents.
It is preferably contained in the agent. Most preferably, the organic solvent is also blended in the first agent and not in the second agent, which has a remarkable effect of preventing the skin from being stained. It can also be blended into an agent. The compounding amount of the organic solvent is preferably 10% by weight or more, more preferably 20% by weight or more in the first agent. Also, when compounded in the second agent, the amount of the compound is 50% in the second agent.
It is preferably at most 30% by weight, more preferably at most 30% by weight.

The acid dye is not particularly limited as long as it is an acid dye that can be usually used in hair dyes. For example, Red No. 3 (erythrosin), Red No. 102 (New Coccin), Red No. 106 ( Acid red), red 20
No. 1 (Resole Rubin B), Red No. 227 (Fast Acid Magenta), Red No. 203 (1) (Erythrosin YS), Red No. 203 (2) (Erythrosin YS)
K), Red No. 231 (Phloxine BK), Red No. 232 (Rose Bengal K), Red No. 401 (Violamin R), Red No. 502 (Bonso 3R), Red No. 503 (Bonso R), Red No. 504 (Bonso SX) ), Red 506 (fast red S), orange 202 (uranine K), yellow 4 (tartrazine), yellow 402 (polar yellow 5G), yellow 403 (1) (naphthol yellow S), yellow 406 (Methanyl Yellow), Green No. 3 (Fast Green FCF), Green No. 201 (Alizanin Cyanine Green F), Green No. 204 (Pyranin Conch), Green No. 205 (Light Green SF), Green No. 401 (Naphthol Green B) ), Green 402 (Ginea Green B), Blue 1 (Brilliant Blue FC)
F), Blue No. 2 (indigo carmine), Blue No. 202 (Patent Blue NA), Blue No. 205 (Alphazurin FG), Brown No. 201 (Resorcinol Brown), Purple No. 401 (Alizur Purple), Black No. 401 (Naphthol blue black) and the like. One or more of these acid dyes can be used.

Although such an acid dye is contained as an essential component in the second agent, it can be incorporated not only into the second agent but also into the first agent as long as the effect of preventing stain on the skin is not impaired. is there. The compounding amount of the acid dye is preferably 0.01 to 5% by weight, more preferably 0.05 to 2% by weight in the second agent. Further, when it is blended with the first agent, the blending amount is preferably 0.5% by weight or less, more preferably 0.1% by weight or less.

Examples of the thickener include carboxymethylcellulose, carboxyvinyl polymer, hydroxyethylcellulose, hydroxypropylcellulose, methylcellulose, ethylcellulose, xanthan gum, carrageenan, alginate, pectin, ferrasene,
Gum arabic, gatch gum, karaya gum, tragacanth gum, powdered agar, bentonite, tamarind gum, polydimethylallylammonium halide type cationic polymer, cation which is a condensation product type of taroylamine obtained from polyethylene glycol, epichlorohydrin, propyleneamine and tallow fatty acid Polymers such as polymers, vinylpyrrolidone, dimethylaminomethacrylate copolymer-type cationic polymers, quaternary nitrogen-containing cellulose ether-type cationic polymers, and crosslinkable polyacrylates. One or more of these thickeners can be used.

The thickener is contained in at least one of the first agent and the second agent, but is preferably contained in both the first agent and the second agent from the viewpoint of preventing dripping onto the skin. .

The compounding amount of these thickeners is not particularly limited as long as the effect of the present invention can be obtained, but is preferably 0.1 to 20% by weight in the compounding agent. In particular, it is 0.5 to 10% by weight.

In addition to the above, an oil component, a surfactant and the like can be added to the first and second agents, respectively, if desired.

Examples of the oily component include avocado oil, camellia oil, turtle oil, macadamia nut oil, corn oil, mink oil, olive oil, rapeseed oil, egg yolk oil, sesame oil, persic oil, wheat germ oil, sasanqua oil, castor oil, Linseed oil, safflower oil, cottonseed oil, eno oil, soybean oil, peanut oil, teaseed oil, kaya oil, rice bran oil, sinagiri oil, Japanese kiri oil, jojoba oil, germ oil, triglycerin,
Liquid fats and oils such as glycerin trioctanoate, pentaerythritate tetraoctanoate and glycerin triisopalmitate; hydrocarbon oils such as liquid paraffin, ozokerite, squalene, pristane, paraffin, ceresin, squalane, petrolatum, and microcrystalline wax; isopropyl myristate , Cetyl octanoate, octyl dodecyl myristate, isopropyl palmitate, butyl stearate, hexyl laurate, myristyl myristate, decyl oleate, hexyl decyl dimethyl octanoate, cetyl lactate, myristyl lactate, lanolin acetate, isocetyl stearate, isostearin Isocetyl acid, cholesteryl 12-hydroxystearylate,
Ethylene glycol di-2-ethylhexylate, fatty acid ester of dipentaerythritol, N-alkyl glycol monoisostearate, neopentyl glycol dicaprate, diisostearyl malate, glycerin di-2-heptylundecanoate, tri-2-ethylhexyl acid Trimethylolpropane, trimethylolpropane triisostearate, pentaerythritol tetra-2-ethylhexylate, glycerin 2-ethylhexylate, trimethylolpropane triisostearate, cetyl 2-ethylhexanoate, 2-ethylhexyl palmitate, trimyristin Acid glycerin, tri-2-heptylundecanoic acid glyceride, castor oil fatty acid methyl ester, oleic acid oil, cetostearyl alcohol, alcohol Toguriseraido, palmitic acid 2-
Heptylundecyl, N-lauroyl-L-glutamic acid-2-octyldodecyl ester, ethyl laurate, 2-hexyldecyl myristate, palmitic acid 2
-Synthetic ester oils such as hexyldecyl, ethyl acetate, butyl acetate, amyl acetate, triethyl citrate; linear polysiloxanes such as dimethylpolysiloxane, methylphenylpolysiloxane, methylhydrogenpolysiloxane; octamethylcyclotetrasiloxane, deca Cyclic silicones such as methylcyclopentasiloxane and dodecamethylcyclohexanesiloxane; One or more of these oily components can be used.

The amount of the oil component is preferably about 0.01 to 10% by weight, more preferably about 0.1 to 5% by weight, for both the first and second agents.

As the surfactant, a nonionic surfactant, an anionic surfactant, a cationic surfactant, an amphoteric surfactant and the like can be arbitrarily used.

Here, the lipophilic nonionic surfactant includes, for example, sorbitan monooleate, sorbitan monoisostearate, sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, sorbitan sesquioleate, sorbitan trioleate, Sorbitan fatty acid esters such as diglycerol sorbitan penta-2-ethylhexylate and diglycerol sulbitan tetra-2-ethylhexylate; glycerin mono-cottonseed oil fatty acid, glycerin monoerucate, glycerin sesquioleate, glyceryl monostearate
Glycerin polyglycerin fatty acids such as diglycerin diisostearate, glycerin pyroglutamate α, α'-oleate and glyceryl monostearate; propylene glycol fatty acid esters such as propylene glycol monostearate; hydrogenated castor oil derivatives; glycerin alkyl Ether and the like.

Examples of the hydrophilic nonionic surfactant include POE sorbitan monooleate, POE-sorbitan monostearate, POE sorbitan monooleate,
POE sorbitan fatty acid esters such as POE-sorbitan tetraolate; POE sorbitan fatty acid esters such as POE-sorbit monolaurate, POE-sorbit monooate, POE-sorbit pentaoleate, POE-sorbit monostearate; POE
POE fatty acid esters such as monooleate, POE monooleate, and eylene glycol distearate;
OE lauryl ether, POE oleyl ether, PO
E stearyl ether, POE behenyl ether, PO
POE alkyl ethers such as E-2-octyl dodecyl ether and POE cholestanol ether; POE alkyl phenyl ethers such as POE octyl phenyl ether, POE nonyl phenyl ether and POE dinonyl phenyl ether; Pluronic (polyoxyethylene poly) Pluronic types such as oxypropylene glycol); POE / POP cetyl ether, POE
POP monobutyl ether, POE POP-2-decyltetradecyl ether, POE POP monobutyl ether, POE POP hydrogenated lanolin, POE POP
Tetra POEs such as alkyl ethers and tetronic
Tetra POP ethylenediamine condensates; POE castor oil, POE hardened castor oil, POE hardened castor oil monoisostearate, POE hardened castor oil triisostearate, POE hardened castor oil monopyroglutamic acid diester, POE hardened castor oil maleic acid, etc. POE castor oil derivatives; POE beeswax lanolin derivatives such as POE sorbit beeswax; coconut oil fatty acid diethanolamide;
Alkanolamides such as lauric acid monoethanolamide and fatty acid isopropanolamide; POE fatty acid amide, sucrose fatty acid ester, POE nonylphenylformaldehyde condensate, alkylethoxydimethylamine oxide, and trioleyl phosphoric acid.

Examples of the anionic surfactant include soap base, fatty acid soaps such as sodium laurate, sodium palmitate and sodium stearate; higher alkyl sulfates such as sodium lauryl sulfate and potassium lauryl sulfate; POE Alkyl ether sulfates such as triethanolamine lauryl sulfate and POE sodium lauryl sulfate; N-acyl sarcosine acids such as sodium lauroyl sarcosine;
Higher fatty acid amide sulfonates such as sodium myristoyl-N-methyltaurine, sodium coconut oil methyltauride, sodium laurylmethyltauride; POE sodium oleyl ether phosphate, POE
Phosphoric acid ester salts such as stearyl ether phosphoric acid;
Sulfosuccinates such as sodium 2-ethylhexylsulfosuccinate and sodium monolauroylmonoethanolamide polyoxyethylene sodium sulfosuccinate; alkylbenzenesulfonic acids such as sodium linear dodecylbenzenesulfonate, linear dodecylbenzenesulfonate triethanolamine and linear dodecylbenzenesulfonate Salt; monosodium N-lauroylglutamate, N
N-acyl glutamates such as disodium stearoyl glutamate and monosodium N-myristoyl-L-glutamate; higher fatty acid ester sulfates such as hydrogenated castor oil fatty acid sodium glycerin sulfate; sulfated oils such as funnel oil; POE alkyl ether carboxylic acid , POE
Alkyl ether carboxylate, α-olefin sulfonate, higher fatty acid alkylolamide sulfate, sodium lauroyl monoethanolamidosuccinate, N-palmitoyl aspartate ditriethanolamine, sodium caseinate and the like.

Examples of the cationic surfactant include alkyltrimethylammonium salts such as stearyltrimethylammonium chloride and lauryltrimethylammonium chloride; distearyldimethylammonium dialkyldimethylammonium chloride; and poly (N, N'-dimethyl-3,5) chloride. Alkylpyridinium salts such as -methylenepiperidinium) and cetylpyridinium chloride; alkyl quaternary ammonium salts, alkyldimethylbenzylammonium salts, alkylisoquinolinium salts, dialkylmonophonium salts, POE alkylamines, alkylamine salts, polyamines Fatty acid derivatives, amyl alcohol fatty acid derivatives, benzalkonium chloride, benzethonium chloride and the like.

Examples of the amphoteric surfactant include imidazolinium betaines, amidobetaines, carbobetaines,
One or more selected from amide sulfobetaines are preferably used.

The imidazolinium betaines are represented by the following general formula (I)

[0030]

Embedded image Examples of imidazolinium-type amphoteric surfactants represented by
It is. These are “Obazoline 662-N” (Toho Chemical Co., Ltd.)
"Anon GLM" (manufactured by NOF CORPORATION),
"Sofdazoline LHL" (Kawaken Fine Chemicals Co., Ltd.)
), "Milanor DM" (Milanor Co., Ltd.), etc.
It is commercially available.

The amide betaines are represented by the following general formula (II)

[0032]

Embedded image The amidobetaine type amphoteric surfactant represented by is exemplified. These are "Levon 2000" (Sanyo Chemical Co., Ltd.)
Commercially available as “Anon BDF” (manufactured by NOF Corporation).

As the carbobetaines, the following general formula (III)

[0034]

Embedded image And a carbobetaine type amphoteric surfactant represented by the following formula: These are “Anon BL” (manufactured by NOF Corporation),
It is commercially available as "Dehainton AB-30" (Henkel Co., Ltd.) and the like.

The amide sulfobetaines are represented by the following general formula (IV)

[0036]

Embedded image The amidosulfobetaine type amphoteric surfactant represented by is exemplified. These are "Lonzain-CS" (manufactured by Lonza Co., Ltd.) and Miratine CBS (manufactured by Milanol Co., Ltd.).
Etc. are commercially available.

In the general formulas (I) to (IV), R ¹ represents an alkyl or alkenyl group having 9 to 21 carbon atoms, preferably an alkyl or alkenyl group having 11 to 17 carbon atoms. , Most preferably 1 carbon atom
Represents 1 to 13 alkenyl groups. If the number of carbon atoms is less than 9, the hydrophilicity is too strong, while if the number of carbon atoms exceeds 21, the solubility in water becomes poor. In addition, x is an integer of 2 to 4, y is an integer of 0 to 3, and z is an integer of 1 or 2.

One or more of these surfactants can be used. In the present invention, among these, nonionic surfactants are preferably used, and in particular, POE alkyl ethers, POE fatty acid esters, POE castor oil or hydrogenated castor oil derivatives are preferably used.

The surfactant is used as a dispersing agent, a solubilizing agent, and an emulsifying agent.
It is preferably about 0.01 to 10% by weight.

The hair dye of the present invention contains other components usually used in hair dyes, such as a pH adjuster, a silicone derivative, a sequestering agent, and a protein hydrolyzate as long as the effects of the present invention are not impaired. Products, preservatives, fragrances, pigments, fatty acids, esters, and the like can also be appropriately compounded.

The hair dyeing method of the present invention comprises a first step of applying the first agent to the hair using the above hair dye, and a second step of applying the second agent to the hair, The hair is dyed by performing the second step after the first step.

Specifically, for example, after the first agent is applied to the hair, it is left for about 5 to 15 minutes. During this time, 40-50 ° C
It may be heated to a degree. Next, the second agent is applied over the first agent. After application of the second agent, it is left for about 5 to 15 minutes. During this time, you may heat up to about 40-50 degreeC. After this, the first and second parts which are extra than the hair by means such as washing away, etc.
Remove the agent.

[0043]

EXAMPLES The present invention will be described in more detail with reference to the following Examples, but it should not be construed that the invention is limited thereto. In addition, the compounding amount shows weight%.

Prior to the examples, each evaluation method used in the present example will be described.

[Evaluation of Dyeing Ability] Using a special panel (5 persons), the dyeing power when a series of hair dyeing operations were performed using each sample was evaluated according to the following criteria. <Evaluation Criteria> ◎: Very high dyeing power ○: High dyeing power △: Low dyeing power ×: Remarkably low dyeing power

[Evaluation of color durability] After performing a series of hair dyeing operations on each sample using a specialized panel (5 persons), the degree of dyeing after 14 days was examined, and the color durability was evaluated according to the following criteria. evaluated. <Evaluation Criteria> ◎: Very good color retention ○: Good color retention △: Poor color retention ×: Color falls off immediately

[Evaluation of skin contamination] Specialized panel (5
), The stain on the skin when a series of hair dyeing operations were performed using each sample was evaluated according to the following criteria. <Evaluation Criteria> ◎: Extremely low contamination ○: Low contamination △: Prominent contamination ×: Extremely dirty

[Evaluation of Temperature Stability] Each sample was stored in a thermostat at 50 ° C. for one month, and then visually observed, and evaluated according to the following criteria. <Evaluation Criteria> ○: Invariable ：: Viscosity decreased or increased slightly △: Slightly separated ×: Separated

(Examples 1 and 2, Comparative Examples 1 to 3)
In, each component was sequentially dissolved in ion-exchanged water at room temperature to obtain samples of the first agent and the second agent, respectively.

Next, after applying 100 g of the first agent to the hair,
After leaving it for about 10 minutes while heating it to about 40 ° C., apply 100 g of the second agent to the hair, leave it for about 10 minutes while maintaining the above temperature, and wash it thoroughly with water to dye it. The hair went. Based on the evaluation criteria, dyeability, color durability, staining on skin, and temperature stability were evaluated. Table 1 shows the results.

[0051]

[Table 1]

(Synthesis Example) First Agent Synthesis Example (1) to (5): First Agent (1): Benzyl alcohol 30 Citric acid Adjusted to pH 2.5 Ethanol 10 Stearyl alcohol 5 Keratin hydrolyzate 0.5 Ion Exchange water balance (Production method) Each of the above components was sequentially dissolved in ion exchange water at room temperature to obtain a sample.

First agent (2): 2-phenoxyethanol 15 glycolic acid adjusted to pH 4.0 1,3-butylene glycol 10 cetostearyl alcohol 3 dimethylpolysiloxane (20cs) 0.1 sodium pyrrolidonecarboxylate 0.1 xanthan gum 2 Ion-exchanged water balance (Production method) Each of the above components was sequentially dissolved in ion-exchanged water at room temperature to obtain a sample.

First agent (3): benzyl alcohol 7 tartaric acid adjusted to pH 3.0 propylene glycol 15 polyethylene glycol 8 sterial trimethylammonium chloride 0.2 carboxyvinyl polymer 1 black 401 0.01 purple 401 0.02 orange No. 205 0.05 Ion-exchanged water balance (Production method) The above components were sequentially dissolved in ion-exchanged water at room temperature to obtain a sample.

First agent (4): phenylethanol 15 N-methylpyrrolidone 10 dynamite glycerin 5 n-butanol 8 disodium edetate 0.2 citric acid pH adjusted to 2.0 guar gum 1 amidobetaine 0.1 sodium lauryl sulfate 0 5.5 Avocado oil 2 Lauric acid 1 Black No. 401 0.01 Ion-exchanged water balance (Production method) The above components were sequentially dissolved in ion-exchanged water at room temperature to obtain a sample.

First agent (5): benzyl alcohol 10 dipropylene glycol 5 polyethylene glycol 15 glycolic acid adjusted to pH 3.0 oleyl alcohol 1 isostearyl alcohol 2 isopropyl myristate 5 sodium lauryl sulfate 0.5 sulfobetaine 0.3 mono Sorbitan stearate 1 Carboxymethylcellulose 2 Isopropanol 5 Cysteine 0.1 Oxybenzone 0.1 Fragrance 0.1 Ion-exchanged water Balance (Preparation method) The above components were sequentially dissolved in ion-exchanged water at room temperature to obtain a sample.

Second Agent Synthesis Example (1) to (4): Second Agent (1): Black 401 0.1 Purple 401 0.1 Yellow 4 0.1 Citric acid Adjusted to pH 3.5 Carboxy Vinyl polymer 1 avocado oil 1 stearic acid 4 cetostearyl alcohol 2 dimethylpolysiloxane (20cs) 0.1 alkyl betaine 5 POE sorbitan monostearate 3 1,3-butylene glycol 5 edetate 4 sodium 0.1 fragrance 0.1 ion Exchange water balance (Production method) Each of the above components was sequentially dissolved in ion exchange water at room temperature to obtain a sample.

Second agent (2): Orange No. 205 0.2 Adjusted to tartaric acid pH 2.5 Xanthan gum 3 Ethanol 5 Polyethylene glycol 2 N-methylpyrrolidone 10 Benzyl alcohol 3 Lauryl alcohol 1 Oxybenzone 0.1 Ion-exchanged water Balance (Production method) ) Each of the above components was sequentially dissolved in ion-exchanged water at room temperature to obtain a sample.

Second agent (3): Red No. 106 0.1 Yellow 403 (1) 0.05 Glycolic acid Adjusted to pH 3.5 Carboxymethyl cellulose 1 Xanthan gum 1 Cyclohexanol 3 Cetyl alcohol 2 Propanol 1 Camellia oil 0.5 Sorbitan monoisostearate 1 Sodium lauryl sulfate 2 Dimethyl polysiloxane 0.05 Fragrance 0.1 Cysteine 0.05 Keratin hydrolyzate 0.05 Ion exchange water Balance (Production method) The above components are sequentially dissolved in ion exchange water at room temperature. Then, a sample was obtained.

Second agent (4): Orange No. 205 0.1 Purple No. 401 0.1 Citric acid Adjusted to pH 3.0 Carboxyvinyl polymer 3 Xanthan gum 0.5 Disodium edetate 0.1 Oxybenzone 0.1 Collagen water Decomposed product 0.1 Dimethyl polysiloxane 0.1 Ion-exchange water balance (Preparation method) Each of the above components was sequentially dissolved in ion-exchange water at room temperature to obtain a sample.

(Example 3) After applying 70 g of the first agent (1) shown in the above synthesis example to hair, leaving it for about 10 minutes while heating it to about 40 ° C, 70 g of the second agent (2) was applied to the hair. The hair was then left for about 10 minutes while maintaining the above temperature, and then thoroughly washed with water to perform hair dyeing. When the dyeing property, color durability, staining to skin, and temperature stability were evaluated according to the above evaluation criteria, dyeing property: ◎, color durability: 、, staining to skin: 、, temperature stability:
◎

In addition to the combination of the first agent (1) and the second agent (2) shown in Example 3, the first agents (1) to (5) and the second agent ( In any of the combinations of 1) to (4), favorable evaluation results were obtained in all of the dyeing properties, the color durability, the staining on the skin, and the temperature stability.

[0063]

As described in detail above, according to the present invention, a two-part hair dye having excellent dyeing properties and stability, good color durability and little stain on the skin, and There is an effect that a hair dyeing method using the same is provided.

Claims (14)

[Claims] A first agent adjusted to pH 1.5 to 4,
A hair dye comprising a second agent adjusted to a pH of 1.5 to 4 containing an acid dye, wherein at least one of the first and second agents contains a thickener. 2. The hair dye according to claim 1, wherein at least one of the first agent and the second agent contains an organic solvent. 3. The hair dye according to claim 2, wherein the first agent contains an organic solvent and the second agent does not contain an organic solvent. 4. The hair dye according to claim 2, wherein one or more aromatic alcohols are blended as an organic solvent. 5. An organic solvent comprising benzyl alcohol, 2
-A mixture of one or more selected from phenoxyethanol and phenylethanol.
The hair dye according to any one of items 1 to 4, above. 6. The hair dye according to claim 2, wherein an organic solvent is blended in the first agent in an amount of 10% by weight or more. 7. The hair dye according to claim 1, wherein the acid dye is incorporated in the second agent in an amount of 0.01 to 5% by weight. 8. A first agent adjusted to a pH of 1.5 to 4,
A first agent comprising a second agent adjusted to a pH of 1.5 to 4 containing an acid dye, and a hair dye comprising a thickener in at least one of the first agent and the second agent; A first step of applying the agent to the hair and a second step of applying the second agent to the hair, and dyeing the hair by performing the second step after the first step. Characteristic hair coloring method. 9. The hair coloring method according to claim 8, wherein at least one of the first agent and the second agent contains an organic solvent. 10. The hair dyeing method according to claim 9, wherein the first agent contains an organic solvent and the second agent does not contain an organic solvent. 11. An organic solvent comprising aromatic alcohol 1
11. A compound comprising at least one species or two or more species.
The hair coloring method according to the above. 12. Benzyl alcohol as an organic solvent,
The hair coloring method according to any one of claims 9 to 11, wherein one or more kinds selected from 2-phenoxyethanol and phenylethanol are blended. 13. The hair coloring method according to claim 9, wherein an organic solvent is blended in the first agent in an amount of 10% by weight or more. 14. The hair coloring method according to claim 8, wherein the acid dye is incorporated in the second agent in an amount of 0.01 to 5% by weight.