EP3215114A1

EP3215114A1 - Oxidative hair dye

Info

Publication number: EP3215114A1
Application number: EP15775007.6A
Authority: EP
Inventors: Akira Matsutani; Masaki Kawai; Shoji Machida; Shoko NAGAFUCHI; Koji Takada; Hiroaki Fukuda
Original assignee: Henkel AG and Co KGaA
Current assignee: Henkel AG and Co KGaA
Priority date: 2014-11-05
Filing date: 2015-09-10
Publication date: 2017-09-13
Also published as: JP6636243B2; JP2016088891A; WO2016072040A1

Abstract

An oxidative hair dye which is used by mixing a first agent comprising an alkaline agent and a second agent comprising an oxidation agent, wherein the first agent comprises 1 to 20% by mass of an oxidation dye based on an overall mass of the first agent, wherein the first agent comprises at least one anionic surfactant, at least one ampholytic surfactant, and at least one alkyl glucoside-type nonionic surfactant, and wherein the oxidative hair dye is in a gel form or an emulsion form.

Description

OXIDATIVE HAIR DYE

The present invention relates to an oxidative hair dye capable of sufficiently dyeing hair and particularly white hair, capable of suppressing any dropping of the oxidative hair dye during application thereof to the hair, capable of also suppressing any dropping of the oxidative hair dye from the hair even during the leaving time, and also excellent in the storage stability.

A hair dye, that is, a so-called two-agent hair dye is used as a dye for hair, wherein the hair dye comprises a first agent comprising an alkaline agent and a second agent comprising an oxidation agent and wherein the first agent and the second agent are mixed immediately before the use of the hair dye (Patent Documents 1 to 4). In order to sufficiently dye hair, in particular white hair, with the two-agent hair dye, it is necessary to blend a large amount of the oxidation dye in the first agent. The two-agent hair dye can thereby sufficiently dye the hair. On the other hand, however, the presence of the large amount of oxidation dye in the hair dye may cause an interaction between the oxidation dye and an additive such as a surfactant or a polymer. This interaction leads to some problems such as that the viscosity of the hair dye is increased over time, that the storage stability is degraded due to generation of sediments, and that the temperature of the hair dye is increased during the use thereof.

[PTL 1] JP 2010-006804 A
[PTL 2] JP 2011-132213 A
[PTL 3]JP 2011-132228 A
[PTL 4] JP 2012-072128 A

As mentioned above, when the oxidation dye is added in the hair dye in high concentration, an interaction may be generated between the additive such as a surfactant or a polymer, and the oxidation dye. This interaction may cause a decrease of the viscosity of the hair dye and precipitation of sediments in the hair dye over time. As a result, the storage stability may be degraded which is the performance required as an oxidative hair dye. It is also required that the oxidative hair dye should stay on the hair and cause no dropping thereof during the application thereof to the hair.

An object of the present invention is to provide an oxidative hair dye excellent in the storage stability since the hair dye is stable over time even when an oxidation dye is blended in the first agent thereof in high concentration, capable of suppressing any dropping of the oxidative hair dye from the hair during the application thereof and during the leaving time after the application thereof, and capable of sufficiently dyeing the hair, in particular white hair.

The present inventors have earnestly considered to solve the above-mentioned problems in respect to oxidative hair dyes, and achieved the present invention.
The present invention includes the following preferred embodiments.
[1] An oxidative hair dye which is used by mixing a first agent comprising an alkaline agent and a second agent comprising an oxidation agent,
wherein the first agent comprises 1 to 20% by mass of an oxidation dye based on an overall mass of the first agent,
wherein the first agent comprises at least one anionic surfactant, at least one ampholytic surfactant, and at least one alkyl glucoside-type nonionic surfactant, and
wherein the oxidative hair dye is in a gel form or an emulsion form.
[2] The oxidative hair dye according to [1], wherein the oxidative hair dye has a viscosity of 100 to 2000 mPa.s at 25°C.
[3] The oxidative hair dye according to [1] or [2], wherein the mass ratio of the anionic surfactant and the ampholytic surfactant is from 1:3 to 3:1.
[4] The oxidative hair dye of any one of [1] to [3], wherein the oxidation dye comprises an oxidation dye in a salt form.

According to the oxidative hair dye of the present invention, hair and particularly white hair can sufficiently be dyed, any dropping of the oxidative hair dye from the hair can be suppressed when the oxidative hair dye is applied to the hair, and any dropping of the oxidative hair dye from the hair can be suppressed even during the leaving time. In the present invention, the first agent is stable over time and the oxidative hair dye of the present invention is therefore excellent in the storage stability.

The oxidative hair dye of the present invention comprises a first agent comprising an alkaline agent and a second agent comprising an oxidation agent. The oxidative hair dye of the present invention is a multi-agent oxidative hair dye and is used by mixing at least the first agent and the second agent. The first agent further comprises an oxidation dye in addition to the alkaline agent. The first agent further comprises at least one anionic surfactant, at least one ampholytic surfactant, and at least one alkyl glucoside-type nonionic surfactant.

Oxidation dyes are classified into dye intermediates and couplers. The oxidation dye preferably comprises a dye intermediate. These oxidation dyes may be used alone or in combination of two or more of them.

Examples of the dye intermediates include p-phenylenediamine, toluene-2,5-diamine, N-phenyl-p-phenylenediamine, 4,4'-diaminodiphenylamine, p-aminophenol, o-aminophenol, p-methylaminophenol, N,N-bis(2-hydroxyethyl)-p-phenylenediamine, 2-hydroxyethyl-p-phenylenediamine, o-chlor-p-phenylenediamine, 4-amino-m-cresol, 2-amino-4-hydroxyethylaminoanisole, 2,4-diaminophenol, and the salts thereof. The salts may be hydrochloride salts and sulfate salts. One type of the above may be comprised alone, or two or more types thereof may be comprised in combination as the dye intermediate.

The coupler develops its color by bonding with a dye intermediate. Examples of the couplers include resorcin, 5-amino-o-cresol, m-aminophenol, 5-(2-hydroxyethylamino)-2-methylphenol, m-phenylenediamine, 2,4-diaminophenoxyethanol, toluene-3,4-diamine, 2,6-diaminopyridine, diphenylamine, N,N-diethyl-m-aminophenol, phenylmethylpyrazolone, and the salts thereof. The salts may be hydrochloride salts and sulfate salts. One type of the above may be comprised alone, or two or more types thereof may be comprised in combination as the coupler.

The content of the oxidation dye in the first agent is from 1 to 20% by mass, preferably from 2 to 15% by mass, and more preferably from 3 to 10% by mass, based on an overall mass of the first agent. When the content of the oxidation dye in the first agent is equal to or larger than the lower limit value, the hair dyeing property further increases. When the content of the oxidation dye in the first agent is equal to or smaller than the upper limit value, the first agent can be established as a stable agent.

In the present invention, the oxidation dye may comprise an oxidation dye in the form of a salt. It is said that the oxidation dye in the form of a salt tends to cause problems such as degradation of the storage stability. According to the present invention, however, even when the first agent comprises the oxidation dye in the form of a salt, the oxidative hair dye of the present invention can achieve excellent storage stability.

For the purpose of adjusting the color tone, the first agent may further comprise a direct dye. Examples of the direct dyes include a nitro dye, an acidic dye, a disperse dye, an HC dye, and a basic dye. Examples of the nitro dyes include paranitroorthophenylenediamine, nitroparaphenylenediamine, paranitrometaphenylenediamine sulphate, 2-amino-5-nitrophenol, and picramic acid. Examples of the acidic dyes include Blue No. 1 and Acid Orange 7. Examples of the disperse dyes include Disperse Violet 1, Disperse Blue 1, and Disperse Black 9. Examples of the HC dyes include HC Red 1 and HC Yellow 2. Examples of the basic dyes include Basic Blue 99, Basic Brown 16, and Basic Yellow 87.

The first agent comprises at least one anionic surfactant, at least one ampholytic surfactant, and at least one alkyl glucoside-type nonionic surfactant. Examples of the anionic surfactants include a salt of higher fatty acid, a salt of an alkyl sulphuric acid ester, a salt of an alkyl phosphoric acid ester, a salt of an alkyl ether sulfate ester, a salt of an alkyl ether phosphateester, an alkyl ether carboxylate salt, N-acylmethyltauline salt, an alkylsulphosuccinic acid, acyllactate salt, N-acylsarcosine salt, N-acylglutamate salt, and N-acylmethylalanine salt. Among them, from the viewpoint of the foaming property, a salt of an alkyl sulphuric acid ester and a salt of an alkyl ether sulphate ester are preferable. The salt of alkyl sulphuric acid ester is not particularly limited, and the salt thereof comprises an alkyl group of preferably 10 to 22 carbons, and more preferably 10 to 16 carbons. The salt of alkyl ether sulphate ester is not particularly limited, and the salt thereof comprise an alkyl group based on a linear primary alcohol, a linear secondary alcohol, or a branched-chain alcohol of preferably 10 to 20 carbons and more preferably 12 to 14 carbons, and an alkylene oxide group of the salt has an average additional molar number of preferably 0.5 to 5, more preferably 0.5 to 4 and further more preferably 1 to 3. The alkylene oxide may be, for example, ethylene oxide and propylene oxide. The salt thereof is preferably an alkaline metal salt, and examples thereof include a sodium salt and a potassium salt. The use of the anionic surfactant is preferable, from the viewpoint of the foaming property and the stability of the agent. These anionic surfactants may be used alone or in combination of two or more of them. The content of the anionic surfactant in the first agent is preferably from 0.1 to 50% by mass, and more preferably from 1 to 20% by mass based on the overall mass of the first agent, from the viewpoint of the foaming property and the stability of the agent.

Examples of the ampholytic surfactants include carbobetaine-based, amidebetaine-based, sulfobetaine-based, hydroxysulfobetaine-based, amidesulfobetaine-based, phosphobetaine-based and imidazolinium-based surfactants, each of which comprises an alkyl group, an alkenyl group, or an acyl group, comprising 8 to 24 carbons. Among them, the carbobetaine-based surfactants and the sulfobetaine-based surfactants are preferable, from the viewpoint of viscosity. Examples of preferable ampholytic surfactants incelude amidopropylbetaine laurate, cocamidopropyl betaine, lauryldimethylaminoacetic acid betaine, and laurylhydroxysulfobetaine. These ampholytic surfactants may be used alone or in combination of two or more of them. In the present invention, the content of the ampholytic surfactant in the first agent is preferably from 0.1 to 50% by mass, and more preferably from 1 to 20% by mass based on the overall mass of the first agent, from the view point of acquiring a proper viscosity.

Examples of the alkyl glucoside-type nonionic surfactants include octyl glucodie, nonyl glucoside, decyl glucoside, octyl thioglucoside, lauryl glucoside, and coconut oil alkyl glucoside. The alkyl glucoside-type nonionic surfactant is preferably a C₆ to C₂₀-alkyl glucoside, more preferably a C₆ to C₁₅-alkyl glucoside, and further more preferably a C₆ to C₁₂-alkyl glucoside. The use of these alkyl glucoside-type nonionic surfactants is preferable, from the viewpoint of the foaming property. These alkyl glucoside-type nonionic surfactants may be used alone or in combination of two or more of them. In the present invention, the content of the alkyl glucoside-type nonionic surfactant is preferably from 0.1 to 10% by mass, and more preferably from 0.5 to 5% by mass based on the overall mass of the first agent, from the view point of the stability of the agent.

In the oxidative hair dye of the present invention, because the first agent comprises at least one anionic surfactant, at least one ampholytic surfactant, and at least one alkyl glucoside-type nonionic surfactant, the oxidative hair dye comprising the first agent and the second agent can be beaten to be in the form of foam after the oxidative hair dye is applied to the hair. The oxidative hair dye can be caused to evenly adhere to the hair by foaming the oxidative hair dye like shampooing. Therefore, it is possible to make no unevenness of the dyeing hardly occur in the hair after the dyeing.

The total content of the surfactants in the first agent is preferably from 5.0 to 50% by mass, and more preferably from 10 to 30% by mass based on the overall mass of the first agent, taking into consideration the dropping and the foaming.

The mass ratio of the anionic surfactant and the ampholytic surfactant in the first agent is preferably from 1:3 to 3:1, and more preferably from 1:2 to 2:1. When the mass ratio of the anionic surfactant and the ampholytic surfactant in the first agent is within the above range, the oxidative hair dye is excellent particularly in the hair dyeing property and the viscosity can be obtained with which the oxidative hair dye is easily applied.

In the present invention, the first agent comprises an alkaline agent. In the present invention, the alkaline agent is not particularly limited. Any conventionally known alkaline agent is usable as the alkaline agent. The alkaline agent may be an inorganic alkaline agent or an organic alkaline agent. These o alkaline agents may be used alone or in combination of two or more of them.

Examples of the alkaline agent include ammonia, sodium hydroxide, potassium hydroxide, ammonium carbonate, ammonium bicarbonate, sodium carbonate, isopropanolamine, monoethanolamine, diethanolamine, triethanolamine, and 2-amino-2-methyl-1-propanol.

In the present invention, the content of the alkaline agent in the first agent is not particularly limited, and this content can be properly adjusted taking into consideration a desired dyeing property and the like. The content of the alkaline agent in the first agent is preferably from 0.01 to 20% by mass, more preferably from 1 to 15% by mass, and further more preferably from 3 to 10% by mass, based on the overall mass of the first agent. When the content of the alkaline agent is equal to or larger than the lower limit value, the dyeing property is particularly enhanced. When the content of the alkaline agent is equal to or smaller than the upper limit value, skin stimulation is reduced.

In the present invention, it is preferable that the first agent further comprises a reducing agent in addition to the alkaline agent and the oxidation dye. The addition of the reducing agent can suppress development of the color of the oxidation dye when the first agent is exposed to atmosphere. Examples of the reducing agents include N-acetyl-L-cysteine, L-ascorbic acid, sodium sulfite, sodium pyrosulfite, thioglycolic acid, and the salts thereof. These reducing agents may be used alone or in combination of two or more of them. The content of the reducing agent in the first agent is preferably from 0 to 2% by mass, and more preferably from 0.01 to 1% by mass based on the overall mass of the first agent, from the viewpoint of improvement of the storage stability.

In the present invention, it is possible to blend other components, which may generally be added to a hair dye, in the first agent, if necessary. Examples of the other components which may be added thereto include water soluble cationic polymers such as cationized cellulose and derivatives thereof, cationic starch, cationized guar gum and derivatives thereof, diallyl quarternary ammonium salt/acrylamide copolymer, vinylimidazolium trichloride/vinylpyrolidone copolymer, hydroxyethyl cellulose/dimethyldiallyl ammonium chloride copolymer, vinylpyrolidone/quarternarized dimethylaminoethylmethacrylate copolymer, polyvinylpyrolidone/alkylaminoacrylate copolymer, polyvinylpyrolidone/alkylamino acrylate/vinylcaprolactam copolymer, and vinylpyrolidone/methacrylamidopropyl trimethyl ammonium chloride copolymer; esters such as isopropyl palmitate, isopropyl myristate, octododecyl myristate, hexyl laurate, cetyl lactate, propyleneglycol monostearate, oleyl oleate, hexadecyl 2-ethylhexanoate, isononyl isononanoate, and tridecyl isononanoate; waxes such as bees wax, whale wax, lanolin, and carnauba wax; alcohols such as ethanol, 1-propanol, 2-propanol, butanol, ethyleneglycol, propyleneglycol, benzyl alcohol, phenoxyethanol, 2-benzyloxyethanol, methylcarbitol, ethylcarbitol, propylcarbitol, butylcarbitol, triethyleneglycolmonoethyl ether, triethyleneglycolmonobutyl ether, and glycerin; silicones such as dimethylpolysiloxane, and amino-modified silicone; anti-dandruff agents such as pyrithione zinc and benzalkonium chloride; vitamin preparations; disinfecting agents; anti-inflammatory agents; preservative agents; chelating agents; moisturizing agents such as panthenol; coloring agents such as dyes and pigments; extracts such as protein obtained from silk or hydrolysates thereof, extracts comprising protein obtained from seeds of legume plants, extracts of Asian ginseng, extracts of rice germs, extracts of fucoid, extracts of camellia, extracts of aloe, extracts of galingale, and extracts of chlorella; pearl powder such as mica titanium; fragrances; coloring elements; ultraviolet absorbing agents; and antioxidants.

In the present invention, the second agent comprises an oxidation agent. In the present invention, the oxidation agent is not particularly limited, and any conventionally known oxidation agent is usable. These oxidation agents may be used alone or in combination of two or more of them. The oxidation agents are not particularly limited, and examples thereof include hydrogen peroxide, urea hydrogen peroxide, persulfate, perborate, percarbonate, bromate, and periodate. The oxidation agent is preferably hydrogen peroxide, from the view point of further enhancement of the dyeing property. In the present invention, the content of the oxidation agent in the second agent may be properly adjusted. The content of the oxidation agent in the second agent is preferably from 0.01 to 12% by mass, and more preferably from 0.1 to 6% by mass based on the overall mass of the second agent, from the viewpoint of improvement of the dyeing property.

The second agent may comprise an anionic polymer as a thickening polymer. In the case where the second agent comprises an anionic polymer, the oxidative hair dye of the present invention has more preferable viscosity when the second agent is mixed with the first agent, and there tends to be no dropping of the oxidative hair dye. Examples of the anionic polymers include alkyl acrylate/alkyl methacrylate/polyoxyethylenestearyl ether copolymer, alkyl acrylate/polyoxyethylenebeheneth ether methacrylate copolymer, alkyl acrylate/polyoxyethylenecetyl ether itaconate copolymer, and alkyl acrylate/polyoxyethylenestearyl ether methacrylate cross polymer. The content of the anionic polymer in the second agent may be properly adjusted taking into consideration the viscosity and the nature of the oxidative hair dye. The content of the anionic polymer in the second agent is preferably from 0 to 7% by mass, and more preferably from 0.3 to 5.0% by mass based on the overall mass of the second agent. When the content of the anionic polymer in the second agent is equal to or larger than the lower limit value, there tends to be no dropping of the oxidative hair dye during the application thereof and during the leaving time. When the content of the anionic polymer in the second agent is equal to or smaller than the upper limit value, application of the oxidative hair dye becomes easy for the overall hair and there tends to be no uneven dyeing.

The second agent has pH of preferably 2 to 5, and more preferably 2 to 4 at 25°C. When of the second agent has pH in this range, the hair dyeing property of the oxidative hair dye, which is used by mixing the first agent and the second agent, is excellent.

In the oxidative hair dye of the present invention, the mass ratio of the first agent and the second agent is not particularly limited. The mass ratio of the first agent and the second agent in the oxidative hair dye of the present invention (the first agent:the second agent) is preferably from 1:10 to 10:1, more preferably from 1:5 to 5:1, further more preferably from 1:4 to 3:1, and particularly more preferably from 1:3 to 2:1, from the viewpoint of the hair dyeing property.

It is preferable that the first agent and the second agent are each in a liquid form or a gel form. When the first agent and the second agent are each in a liquid form or a gel form, any uneven mixing can be suppressed when these agents are mixed with each other.

The oxidative hair dye of the present invention, which is used by mixing the first agent and the second agent, is in a gel form or an emulsion form. Because the oxidative hair dye of the present invention has a proper viscosity, there tends to be no dropping thereof when the oxidative hair dye is applied to the hair, and application thereof becomes easy for the overall hair. Preferably, the oxidative hair dye of the present invention can be applied to the hair to be spread over the overall hair, concurrently being foamed. Forming the oxidative hair dye on the hair, which is applied to the hair, can cause the oxidative hair dye to evenly be supplied to each hair. When the oxidative hair dye is foamed, the foaming is executed in a manner of shampooing and the oxidative hair dye can be caused to sufficiently cling to the hair. According to the present invention, the foamed oxidative hair dye tends to generate no dropping thereof during the leaving time. According to the present invention, the hair can be dyed with a small use amount of oxidative hair dye, and therefore, the hair can economically be dyed.

The oxidative hair dye of the present invention, which is used by mixing the first agent and the second agent, has a viscosity of preferably 100 to 2000 mPa.s, more preferably 200 to 1000 mPa.s, and further more preferably 350 to 1000 mPa.s at 25°C. When the viscosity of the oxidative hair dye is equal to or higher than the lower limit value, there tends to be no dropping thereof during the application thereof and during the leaving time. When the viscosity of the oxidative hair dye is equal to or lower than the higher limit value, application of the oxidative hair dye to the hair becomes further easy and the oxidative hair dye can be evenly supplied to each hair.

The oxidative hair dye of the present invention, which is used by mixing the first agent and the second agent, has pH of preferably 7 to 12, and more preferably 8 to 11 at 25°C. When the oxidative hair dye has pH in this range, the hair dyeing property is excellent.

After mixing the first agent and the second agent with each other, the oxidative hair dye of the present invention may be applied to dry hair or hair after washed with water and towel-dried, and the hair applied therewith may be left as it is for a predetermined time period, or the oxidative hair dye may be foamed on the hair and the hair may be left for a predetermine time period. After the predetermined time period elapses, the oxidative hair dye is washed with water from the hair and the hair is dried.

The time period from the application of the oxidative hair dye to the hair to the foaming thereof is preferably equal to or shorter than 10 minutes, more preferably equal to or shorter than five minutes, and further more preferably equal to or shorter than three minutes from the viewpoint of prevention of any dropping thereof. The leaving time, which was the time from the foaming of the oxidative hair dye to the dyeing of the hair, is preferably five minutes or longer and more preferably 10 minutes or longer, and the time is preferably 60 minutes or shorter and more preferably 40 minutes or shorter, from the viewpoint of the hair dyeing effect. After the hair dyeing sufficiently progresses, the oxidative hair dye is removed from the hair by washing.

The present invention will be described in detail with reference to the Examples and Comparative Examples. The present invention is not limited only to the following Examples.

In each of the Examples and Comparative Examples, oxidative hair dyes were each prepared, wherein each of oxidative hair dyes comprises the first agent and the second agent having the composition shown in Table 1.

The viscosity was measured for each of the oxidative hair dyes by means of the following method. For the measurement of the viscosity of the mixture of the first agent and the second agent, the first agent and the second agent were weighed to be 50 g in total at mixing ratio of 1:1 in a cylinder-shaped glass sample tube having the size of a diameter of 35 mm × a height of 78 mm, the lid of the tube was closed, the first agent and the second agent were mixed with each other to be a sufficiently mixed, and the obtained mixture was used. The mixture was dipped in a constant temperature bath at 25°C for 30 minutes and the mixture was thereafter taken out of the constant temperature bath. The viscosity of the mixture at 25°C was measured by means of a B-type viscosity meter (TVB-10M manufactured by Toki Sangyo Co., Ltd.) using a No. 3 rotor for one minute at 30 rpm and, when the viscosity was equal to or lower than 400 mPa.s, the viscosity was measured using a No. 2 rotor for one minute at 30 rpm. The result was presented in a value. The measurement was executed for three times and the average value of the obtained values was employed.

The following evaluation sessions were executed for each of the oxidative hair dyes prepared in the Examples and Comparative Examples. The evaluation sessions were executed by five professional panelists and the evaluation was determined according to the following determination criteria. When the evaluation of the five professional panelists was split into two, the evaluation supported by the majority was employed and, when the evaluation was split into three, the test and the evaluation were again executed.
Table 1 shows the results.

1. Organoleptic Evaluation on Dropping during Application
Such oxidative hair dye was used for the evaluation as that obtained by mixing 10 g of a first agent and 10 g of a second agent to be evenly mixed with each other. The evaluation was executed using a human head. The hair was firstly washed with a shampoo and the moisture of the hair was sufficiently swabbed using a towel. Then, the oxidative hair dye obtained in each of the Examples or Comparative Examples was applied to the hair. The five professional panelists determined dropping evaluation of the oxidative hair dye during the application thereof according to the following determination criteria.
<Determination Criteria for Dropping during Application>
A: There was no dropping at all.
B: Liquid pools were generated but there was no dropping.
C: There was a very small amount of dropping.
D: There was dropping to obstruct the application.

2. Organoleptic Evaluation on Foaming during Dyeing (Foaming Property)
After the above evaluation, the five professional panelists each tried foaming the oxidative hair dye applied to the hair in a manner of shampooing. The five professional panelists determined the foaming of the oxidative hair dye (the foaming property) according to the following determination criteria.
<Determination Criteria for Foaming>
A: Sufficient foaming was obtained and the foam was supplied to the overall hair.
B: The foaming was somewhat insufficient but the foam was supplied to the overall hair.
C: The foaming was insufficient and the foam was not supplied to the overall hair.
D: No foaming was obtained.

3. Organoleptic Evaluation on Dropping during Leaving Time
After the above evaluation, the five professional panelists each foamed the oxidative hair dye or, when no foaming was obtained, work was executed to try to foam the oxidative hair dye. The hair with the oxidative hair dye was thereafter left for 30 minutes. The five professional panelists determined the dropping of the oxidative hair dye during the leaving time according to the following determination criteria.
<Determination Criteria for Dropping during Leaving Time>
A: There was no dropping during the leaving time.
B: Liquid pools were generated but there was no dropping.
C: There was a very small amount of dropping.
D: Dropping was so significant that the hair could not be left for 30 minutes.

4. Organoleptic Evaluation on Finish after Dyeing
After the above evaluation, the five professional panelists each washed the oxidative hair dye with warm water after the leaving time for 30 minutes, shampooed the hair, and rinsed the hair. The five professional panelists each towel-dried the hair and dried the hair with hot air using a drier. The five professional panelists determined the finish of the dyed hair according to the following determination criteria.
<Determination Criteria for Finish>
A: No uneven dyeing was observed and each hair was evenly dyed to its root.
B: Substantially no uneven dyeing was observed and each hair was evenly dyed to its root.
C: A very small amount of uneven dyeing was observed.
D: Uneven dyeing was observed and each hair was not evenly dyed.

From the above results, in Examples 1 to 14 wherein first agents each comprise the anionic surfactant, the ampholytic surfactant, and the alkyl glucoside-type nonionic surfactant, good results were obtained for all of the organoleptic evaluation sessions on the dropping during the application, the foaming, the dropping during the leaving time, and the finish after the dyeing. Although the oxidative hair dye of the present invention comprised a large amount of an oxidation dye, the oxidative hair dye had good storage stability. On the other hand, in Comparative Examples 1 to 7 wherein first agents each did not comprise any one of the anionic surfactant, the ampholytic surfactant and the alkyl glucoside-type nonionic surfactant, dissatisfactory results were obtained for the organoleptic evaluation sessions and the object of the present invention could not be achieved.
For example, in Example 1 (417 mPa.s), Example 3 (609 mPa.s), Example 8 (388 mPa.s), Example 13 (510 mPa.s) and the like, there was no dropping during the application. On the other hand, in Comparative Examples 1, 3, and 7, the viscosities thereof were lower than 100 mPa.s and there was dropping and the application was obstructed.

Claims

An oxidative hair dye which is used by mixing a first agent comprising an alkaline agent and a second agent comprising an oxidation agent,
wherein the first agent comprises 1 to 20% by mass of an oxidation dye based on an overall mass of the first agent,
wherein the first agent comprises at least one anionic surfactant, at least one ampholytic surfactant, and at least one alkyl glucoside-type nonionic surfactant, and
wherein the oxidative hair dye is in a gel form or an emulsion form.
The oxidative hair dye according to claim 1, wherein the oxidative hair dye has a viscosity of 100 to 2000 mPa.s at 25°C.
The oxidative hair dye according to claim 1 or 2, wherein the mass ratio of the anionic surfactant and the ampholytic surfactant is from 1:3 to 3:1.
The oxidative hair dye of any one of claims 1 to 3, wherein the oxidation dye comprises an oxidation dye in a salt form.