KR102530510B1 - Hair dye composition for oxidative dyeing - Google Patents

Abstract

The present invention relates to a hair dye composition, and specifically, in an oxidation-type hair dye composition composed of a first agent containing an oxidation dye precursor, a coupler, and an alkali agent, and a second agent containing an oxidizing agent, ammonia as an alkali agent in the first agent, and optionally at least one selected from the group consisting of ammonium carbonate and ammonium bicarbonate, including monoethanolamine, as a pH buffer; And it relates to a hair dye composition for keratin fibers with reduced scalp irritation and hair damage and improved dyeing durability and leveling ability by including tromethamine.

Description

Oxidative hair dye composition {Hair dye composition for oxidative dyeing}

The present invention relates to a hair dye composition, and specifically, in an oxidation-type hair dye composition composed of a first agent containing an oxidation dye precursor, a coupler, and an alkali agent, and a second agent containing an oxidizing agent, ammonia as an alkali agent in the first agent, and optionally at least one selected from the group consisting of ammonium carbonate and ammonium bicarbonate, including monoethanolamine, as a pH buffer; And it relates to a hair dye composition for keratin fibers with reduced scalp irritation and hair damage and improved dyeing durability and leveling ability by including tromethamine.

In general, an oxidation-type hair dye composition of keratin fibers including hair exhibits color development when an oxidation dye precursor and a coupler penetrate into the hair and combine through an oxidative condensation reaction. In the process, the alkali agent contained in the first agent promotes the generation of perhydroxyl anion through mixing with the second agent containing an oxidizing agent, and these cause the oxidation reaction of the dye and melanin decomposition, resulting in color development and decolorization. show effect.

In addition, the alkali agent suppresses internal bonding of the hair, that is, ionic bonding and hydrogen bonding to swell the hair, thereby enhancing efficient penetration of the dye into the hair. However, since the increase in pH due to such an alkali agent promotes the hydrolysis of hair proteins or simultaneously causes an oxidation reaction of proteins, hair damage occurs.

Therefore, as an alkali agent used, ammonia, which has a small molecule and is easy to penetrate into the hair and has a relatively low pH as an alkali agent, causes less damage to hair compared to other alkali agents and exhibits excellent coloring and decoloring effects, but is most commonly used. Ammonia content is required, causing irritation of the scalp due to high pH, and high volatility, which causes strong irritation to the eyes and nose during dyeing. In order to solve the odor irritation problem, monoethanolamine is usually used as an alkali agent alone or in combination with ammonia to reduce the amount of ammonia, thereby alleviating the irritation caused by ammonia.

The blending amount of monoethanolamine may vary depending on the product's appeal. For example, in the case of targeting a hair dye without irritating odor, only monoethanolamine is used as the sole alkali agent excluding ammonia, and the dyeing power is the most important beauty salon. In the (salon) route, monoethanolamine and ammonia are mainly used in parallel, but the dependence on ammonia, which has a relatively excellent dyeing effect, is high.

However, when monoethanolamine is used as an alkali agent, although the irritating odor can be reduced, the pH of the hair dye is higher by monoethanolamine, so scalp irritation and hair damage are more severe than using only ammonia as an alkali agent. there is.

In order to reduce such irritation, Korean Patent Publication No. 2003-0015654 discloses a composition for external application for skin containing a raspberry leaf or fruit extract having skin irritation and inflammation relief effects, and Korean Patent Publication No. 2006-0070847 2 discloses a composition for external application for relieving scalp irritation containing raspberry leaf or fruit extracts, and attempts have been made to reduce skin or scalp irritation caused by hair dyes by containing mainly natural plant extracts.

In addition, the alkali agent contained in the first agent realizes color development through an oxidation reaction through mixing with the second agent containing an oxidizing agent. When the pH of the mixture exceeds 9.8, especially 10.0, the oxidation reaction of the dye occurs. It also has a problem that the color is developed from the outside, which is the surface of the hair, and the dyeing durability is lowered rather than the dye being penetrated into the hair. In addition, in the condition of gray hair in which dyed hair and white hair are mixed, there is a problem in that dyeing uniformity is lowered due to excessive color development in dyed hair compared to white hair.

1. Korean Patent Publication No. 2010-0079278 (published on July 8, 2010) 2. Korean Patent Publication No. 2011-0060201 (published on June 8, 2011)

Accordingly, the inventors of the present invention tried to find a combination of ingredients that can improve the scalp irritation and hair damage, which are chronic problems of hair dyeing products, and at the same time improve the durability of dyeing and the leveling quality between dyed hair and white hair. Alkaline agents mainly used in, tromethamine; And it was found that the above problems can be solved by combining with ammonium carbonate or ammonium bicarbonate.

Accordingly, an object of the present invention is to provide a composition with improved leveling properties while reducing scalp irritation and hair damage in an oxidation-type hair dye composition using ammonia as an alkali agent.

In order to achieve the above object, the present invention is an oxidation-type hair dye composition composed of an oxidation dye precursor, a coupler, and a first agent containing an alkali agent and a second agent containing an oxidizing agent, wherein the first agent includes ammonia as an alkali agent. and at least one selected from the group consisting of ammonium carbonate and ammonium bicarbonate as a pH buffer; And it provides an oxidative type hair dye composition containing tromethamine.

In the oxidation-type hair dye composition using ammonia as an alkali agent, the oxidation-type hair dye composition according to the present invention not only greatly reduces scalp irritation and hair damage, but also improves dyeing durability and leveling by controlling the oxidation reaction rate of the dye can

The oxidation-type hair dye composition of the present invention includes a first agent containing an oxidation dye precursor, a coupler, an alkali agent, and the like; It consists of a second agent containing an oxidizing agent, etc., the first agent includes ammonia as an alkali agent, and at least one selected from the group consisting of ammonium carbonate and ammonium bicarbonate as a pH buffer; and tromethamine.

In addition, the oxidation type hair dye composition of the present invention may further contain monoethanolamine as an alkali agent in the first agent. Specifically, in the oxidation-type hair dye composition of the present invention, ammonia may be partially replaced with monoethanolamine.

Tromethamine, which is used as a kind of pH buffer in the present invention, has no volatile stimulus such as ammonia, but is more effective than other organic amine alkali agents such as monoethanolamine, aminomethylpropanol, and isopropanolamine, which are most commonly used as ammonia substitutes. It forms a low pH, so there is little hair damage. Therefore, when used together with ammonia or monoethanolamine, it is possible to maintain a desired level of color development and decolorization, while preventing further severe hair damage, and to alleviate irritation and irritation caused by ammonia by sufficiently lowering the amount of ammonia in the composition.

The oxidation type hair dye composition according to the present invention contains tromethamine in an amount of 0.01 to 20% by weight, preferably 0.1 to 10% by weight, more preferably 0.1 to 5% by weight based on the total weight of the first agent composition do. If the content of tromethamine is less than 0.01% by weight, the amount of ammonia cannot be effectively reduced to the extent that stimulation by ammonia can be suppressed while maintaining sufficient color development and decolorization effects. Since it is not expected and represents a problem in which only hair damage is increased, it is preferable to use it within the above range.

The oxidation type hair dye composition according to the present invention contains ammonia in an amount of 0.02 to 10% by weight, preferably 0.05 to 8% by weight, or 0.1 to 6% by weight based on the total weight of the first agent composition. In addition, the oxidation-type hair dye composition according to the present invention contains monoethanolamine in an amount of 0.05 to 15% by weight, preferably 0.1 to 15% by weight, based on the total weight of the first agent composition.

In the oxidative hair dye composition according to the present invention, the combination ratio of ammonia and monoethanolamine is not particularly limited, but the weight ratio is preferably 3:1 to 10:1, more preferably 3:1 to 5:1. can If the weight ratio is less than 3:1, the degree of dyeing durability and leveling can be greatly reduced, and if it exceeds 10:1, the degree of dyeing durability and leveling can be maintained at a good level, but the degree of ammonia odor reduction As a result, monoethanolamine cannot replace ammonia.

In the oxidative hair dye composition according to the present invention, the combination ratio of ammonia and tromethamine is not particularly limited, but the weight ratio is preferably 2: 1 to 6: 1, more preferably 2: 1 to 4: 1 there is.

The oxidation-type hair dye composition of the present invention preferably has a pH range of 7.0 to 10.0 corresponding to neutral to weak alkali, and particularly preferably has a pH range of 9.0 to 9.8 considering color development. This means that when the pH is less than the pH range, decomposition of the oxidizing agent included in the second agent is not easy, and it is not easy to widen the cuticle of the hair and efficiently penetrate the treatment agent into the hair, and when the pH exceeds the pH range, the dye oxidation reaction This is because, since this is promoted, the dye is developed from the outside, which is the surface of the hair, rather than penetrating into the inside of the hair, resulting in a problem of lowering the dyeing durability.

An acid or a pH buffering agent may be used as a method for lowering the pH raised by the use of an alkali agent. In the present invention, at least one selected from the group consisting of ammonium carbonate and ammonium bicarbonate is used as the pH buffering agent. In order to lower the pH, when an organic acid commonly used in cosmetics other than ammonium carbonate or ammonium bicarbonate is used, it is not preferable because dyeing power may be greatly reduced.

In the present invention, when at least one selected from the group consisting of ammonium carbonate and ammonium bicarbonate is used as a pH buffer in combination with tromethamine, the effect of further improving dyeing durability and leveling can be obtained.

The oxidation type hair dye composition according to the present invention contains at least one selected from the group consisting of ammonium carbonate and ammonium bicarbonate in an amount of 0.01 to 20% by weight, preferably 0.1 to 10% by weight, based on the total weight of the first agent composition. However, it may be included within the range of content such that the pH of the mixed composition after mixing the hair dye composition does not exceed 10.0, preferably 9.8.

In particular, in the present invention, the combination ratio of at least one selected from the group consisting of ammonium carbonate and ammonium bicarbonate and tromethamine is not particularly limited, but may be preferably 1:1 to 3:1 in weight ratio.

The oxidation-type hair dye composition of the present invention contains a conventional oxidation dye precursor and a coupler in the first agent, and preferably contains two or more kinds of oxidation dye precursors and couplers, and most currently known oxidation dye precursors and couplers can be used. there is.

The type of oxide dye precursor is not particularly limited, but o-aminophenol, p-aminophenol, m-aminophenol, p-phenylenediamine, toluene-2,5-diamine hydrochloride, p-phenylenediamine hydrochloride, Toluene-2,5-diamine, sulfuric acid p-phenylenediamine, sulfuric acid p-methylaminophenol, sulfuric acid o-aminophenol, sulfuric acid p-aminophenol, sulfuric acid toluene-2,5-diamine, sulfuric acid p-phenylenediamine, etc. The oxidation dye precursor is used in an amount of 0.001 to 5.0% by weight based on the total weight of the first agent composition.

In addition, as a coupler, 2-methyl-5-hydroxyethyl aminophenol, p-amino-o-cresol, m-aminophenol, 2,4-diaminophenoxyethanol hydrochloride, m-phenylenediamine hydrochloride, m-phenylenediamine, α-naphthol, resorcinol, 2-methylresorcinol, etc. may be used, and the coupler is used in an amount of 0.001 to 5.0% by weight based on the total weight of the first agent composition. It can be used in combination with an oxidation dye precursor to show various shades to the hair.

In the oxidation type hair dye composition of the present invention, direct dyes commonly used may be added within the range of not impairing the object of the present invention. Such direct dyes include Arianol dyes, p- Nitro-o-phenylenediamine, nitro-p-phenylenediamine, 2-amino-4-nitrophenol, 2-amino-5-nitrophenol, nitro-p-phenylenediamine hydrochloride, picramic acid and other vegetable dyes Henna, etc. can be used.

In addition, components commonly used in hair dyes may be used in the oxidative hair dye composition of the present invention within a range that does not impair the effect of the present invention. For example, antioxidants, metal sequestering agents, solvents, surfactants, thickening agents, fragrances and conditioning agents, etc. are used, but are not particularly limited to those that can be commonly used in hair dyes.

The metal sequestering agent decreases the reactivity of the metal salt, so it should not be included in the composition of the present invention or contained in a very small amount. Examples of the metal sequestering agent include EDTA, disodium EDTA, tetrasodium-EDTA, pentasodium pentitate, etidronic acid, and salts thereof.

Examples of the antioxidant include ascorbic acid, erythorbic acid, cysteine hydrochloride, sodium sulfite and thioglycolic acid, and examples of the solvent include ethanol, propyl alcohol, isopropyl alcohol, propylene glycol, hexylene glycol, diethylene glycol, etc. may be used, and cationic surfactants, anionic surfactants, or nonionic surfactants may be used as surfactants, and higher alcohols having 14 to 22 carbon atoms may be used alone or in combination as thickeners, and nonionic surfactants may be used. Polymers and anionic polymers, paraffin, light liquid isoparaffin, etc. may be used, and cationic polymers, quaternized ammonium salts, or silicone may be used as the conditioning agent.

Next, the components of the second agent of the oxidative hair dye composition of the present invention are explained.

The second agent contains an oxidizing agent, and the oxidizing agent is at least one selected from the group consisting of hydrogen peroxide, urea peroxide, alkali metal bromate, ferricyanide, perborate and persulfate commonly used in oxidative hair dye compositions. It can be used, and it is preferable to use hydrogen peroxide in particular.

The oxidizing agent may be used in an amount of 0.1 to 10.0% by weight based on the total weight of the second agent composition. .

In addition, components commonly used in hair dyes can also be used in the second agent of the present invention within a range that does not impair the effect of the present invention. For example, emulsions such as paraffin, light liquid isoparaffin, higher fatty alcohols, higher fatty acid esters, cationic or nonionic surfactants, stabilizers such as phenacetin, pH adjusters such as phosphoric acid, and the like may be contained.

In addition, the first agent and the second agent of the hair dye composition according to the present invention usually contain water in addition to the above components. As water, it is preferable to use purified water such as ion-exchanged water or distilled water, and the content thereof is not particularly limited, and any amount can be used to sufficiently dissolve or disperse each component used in the hair dye composition.

The hair dye composition according to the present invention is used by mixing the first agent and the second agent immediately before application to hair. At this time, it is not particularly limited, but it is preferable to use a prescription in which the first agent and the second agent are mixed in a weight ratio usually in the range of 1:1 to 1:2.

When the ratio of the first agent is reduced during mixing, the amount of dye is reduced, and the amount of dye penetrating into the hair decreases, resulting in a decrease in color development. The lower the rate, the slower the reaction rate.

In addition, as a method of dyeing hair using the hair dye composition according to the present invention, a conventional method of preparing an oxidation hair dye by mixing the first agent and the second agent, applying the oxidation hair dye to the hair, and washing after a predetermined time has elapsed A dyeing method may be mentioned.

Hereinafter, the present invention will be described in more detail by way of Examples and Comparative Examples, but the present invention is not limited to these examples.

[Reference Example] Preparation of hair dye composition

The first and second hair dye agents of Examples 1 to 7 and Comparative Examples 1 to 8 were prepared with the compositions shown in Tables 1 (Comparative Examples) and 2 (Examples) and Table 3, respectively.

The first agent of the hair dye composition (unit: % by weight) comparative example One 2 3 4 5 6 7 8 Disodium EDT 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 erythorbic acid 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 sodium pyrosulfite 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 P-phenylenediamine 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 m-aminophenol 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 resorcinol 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 Cetearyl Alcohol 10 10 10 10 10 10 10 10 polyoxyethylene
Stearyl ether 3 3 3 3 3 3 3 3 behentrimonium
chloride One One One One One One One One Ammonia water (28%) 6 6 6 6 7 6 2 5.75 tromethamine - 2 2 6 One One One 2 Ammonium Bicarbonate 3 - - 3 One 4 3 - Ammonium Carbonate - - - - - - - 3 monoethanolamine - - - - - - 4 0.25 lactic acid - - 5 - - - - - combination flavor Appropriate amount Appropriate amount Appropriate amount Appropriate amount Appropriate amount Appropriate amount Appropriate amount Appropriate amount Purified water to 100 to 100 to 100 to 100 to 100 to 100 to 100 to 100 gun 100 100 100 100 100 100 100 100 First agent pH 9.65 10.16 9.68 9.61 9.89 9.52 10.29 9.75

The first agent of the hair dye composition (unit: wt%) Example One 2 3 4 5 6 7 Disodium EDT 0.1 0.1 0.1 0.1 0.1 0.1 0.1 erythorbic acid 0.5 0.5 0.5 0.5 0.5 0.5 0.5 sodium pyrosulfite 0.5 0.5 0.5 0.5 0.5 0.5 0.5 P-phenylenediamine 0.5 0.5 0.5 0.5 0.5 0.5 0.5 m-aminophenol 0.1 0.1 0.1 0.1 0.1 0.1 0.1 resorcinol 0.4 0.4 0.4 0.4 0.4 0.4 0.4 Cetearyl Alcohol 10 10 10 10 10 10 10 polyoxyethylene
Stearyl ether 3 3 3 3 3 3 3 behentrimonium
chloride One One One One One One One Ammonia water (28%) 6 6 6 6 4.5 5.25 5 tromethamine 2 2 3 One 2 2 2 Ammonium Bicarbonate 1.5 - 3 3 3 3 3 Ammonium Carbonate 1.5 3 - - - - - monoethanolamine - - - - 1.5 0.75 One lactic acid - - - - - - - combination flavor Appropriate amount Appropriate amount Appropriate amount Appropriate amount Appropriate amount Appropriate amount Appropriate amount Purified water to 100 to 100 to 100 to 100 to 100 to 100 to 100 gun 100 100 100 100 100 100 100 First agent pH 9.65 9.72 9.55 9.62 9.82 9.74 9.73

According to the composition ratios described in Tables 1 and 2, the water phase includes purified water, disodium EDTA, an antioxidant (erythorbic acid), a reducing agent (sodium pyrosulfite) and an oxide dye precursor (p-phenylenediamine, m -Aminophenol) and coupler (resorcinol) were added and dissolved by heating to 75°C. As an oil phase, cetearyl alcohol, polyoxyethylene stearyl ether, and behentrimonium chloride were added and dissolved by heating to 75°C. The oil phase and the aqueous phase were mixed and emulsified, and then cooled to 55 ° C., and then an alkali agent, a pH adjuster, and a combined fragrance were added and mixed uniformly to prepare a first agent of a hair dye composition.

The second agent of the hair dye composition (unit: % by weight) the second Cetearyl Alcohol 5 mineral oil 3 Polyoxyethylene stearyl ether One Disodium EDT 0.2 phosphoric acid Appropriate amount Hydrogen peroxide water (35%) 17 Purified water to 100

The second agent (oxidizing agent) of the hair dye composition dissolves cetearyl alcohol, mineral oil, and polyoxyethylene stearyl ether in an oil phase by heating to 75 ° C according to the composition ratio shown in Table 3 above, and disodium EDTA and Purified water was dissolved by heating to 75 ° C in the aqueous phase, the aqueous phase and the oil phase were mixed and emulsified at the same temperature, cooled to 55 ° C, phosphoric acid and hydrogen peroxide (35%) were added, and mixed and stirred uniformly.

The first agent and the second agent prepared as described above were mixed in a weight ratio of 1:1 to prepare a hair dye composition, and the prepared hair dye composition had pH values shown in Table 4 below.

comparative example Example One 2 3 4 5 6 7 8 One 2 3 4 5 6 7 pH 9.46 9.84 9.44 9.47 9.71 9.34 9.98 9.59 9.48 9.55 9.41 9.44 9.62 9.57 9.56

[Test Example 1] Sensory evaluation of scalp stimulation

The hair dye composition prepared in the reference example was applied to the upper arm, and irritation was evaluated while left for 30 minutes, which is a typical hair dye leaving time. Ten panelists were evaluated according to the criteria of ◎ no irritation / ○ moderate / △ irritation / × severe irritation, and the results are shown in Table 5 below.

comparative example Example One 2 3 4 5 6 7 8 One 2 3 4 5 6 7 scalp irritation ○ × △ ○ △ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○

Referring to Table 5, in the case of Comparative Example 2, which did not contain a component for adjusting the pH of the hair dye, scalp irritation was severe, and in the case of Comparative Example 3, in which lactic acid, an organic acid, was used to lower the pH of the hair dye, there was still scalp irritation. Able to know. In addition, it can be seen that there is scalp irritation even in the case of Comparative Example 5, which is out of the range of the appropriate combination ratio of ammonia and tromethamine.

On the other hand, in the case of Examples 1 to 7 in which ammonium carbonate or ammonium bicarbonate was mixed with an appropriate amount of tromethamine, it can be seen that irritation is greatly alleviated.

[Test Example 2] Sensory evaluation of hair damage

The hair dye composition prepared in the reference example was applied to the experimental human hair tresses, and left for 30 minutes, which is a typical hair dye leaving time, washed with shampoo and dried. The texture after drying was evaluated by 10 expert panelists according to the criteria of ◎ very soft / ○ soft / △ fair / × rough, and the results are shown in Table 6 below.

comparative example Example One 2 3 4 5 6 7 8 One 2 3 4 5 6 7 hair damage ○ × △ ○ △ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○

Referring to Table 6, in the case of Comparative Example 2, which did not contain a component for adjusting the pH of the hair dye, the degree of hair damage was severe, and even in the case of Comparative Example 3, in which lactic acid, an organic acid, was used to lower the pH of the hair dye, the hair was still damaged. It can be seen that there is In addition, it can be seen that there is hair damage even in the case of Comparative Example 5 in which the content of ammonia exceeds the range of the appropriate content and the range of the appropriate combination ratio of ammonia and tromethamine is out of range.

On the other hand, in the case of Examples 1 to 7 in which ammonium carbonate or ammonium bicarbonate was mixed with an appropriate amount of tromethamine, it could be confirmed that the feeling of hair damage was greatly alleviated.

[Test Example 3] Evaluation of dyeing durability

The hair dye composition prepared in the reference example was applied to an experimental human white hair tress, left for 30 minutes, which is a normal hair dye leaving time, and then washed with shampoo and dried. The dried tresses were put back into the shampoo solution, shaken at a speed of 200 rpm for 10 minutes using a shaker, and then rinsed in running water for 1 minute and dried. After drying, the L value was measured using a color difference meter (HunterLab Labscan XE), and the color durability was evaluated using the dL value, which is the difference from the L value before the water drain test. The smaller the dL value, the better the color durability, and the results are shown in Table 7 below.

comparative example Example One 2 3 4 5 6 7 8 One 2 3 4 5 6 7 dL (vitality) 2.86 3.82 3.65 3.02 3.48 2.95 7.32 2.22 2.02 2.18 1.03 2.58 2.49 2.27 2.24

Referring to Table 7, in the case of Comparative Example 2, in which the pH of the hair dye composition is high because it does not contain a component for adjusting the pH of the hair dye, the color durability is poor due to the promotion of the oxidation reaction of the dye, and Comparative Example 3 using lactic acid, an organic acid It can be seen that the color durability is greatly reduced even in the case of . In addition, it can be seen that the color durability is inferior even in the case of Comparative Examples 4 to 7, which are out of the appropriate combination ratio range of ammonia and tromethamine or monoethanolamine. In particular, it can be seen that in Comparative Example 7, where the combination ratio of ammonia and monoethanolamine is 1:2, which is less than the proper combination ratio, the dyeing durability is greatly reduced.

On the other hand, in the case of Examples 1 to 7 in which ammonia and tromethamine, and at least one of tromethamine, ammonium carbonate and ammonium bicarbonate, or monoethanolamine were mixed in an appropriate ratio according to the present invention, Comparative Examples 1 to 7 It was confirmed that the contrast color durability was greatly improved.

[Test Example 4] Evaluation of level dyeing

The hair dye composition prepared in the reference example was applied to experimental human dyed hair tresses and white hair tresses, left for 30 minutes, which is a normal hair dye leaving time, and then washed with shampoo and dried. After measuring the L value of the bleached hair tress and the white hair tress after drying using a color difference meter (HunterLab Labscan XE), the difference in L value between the dyed hair tress and the white hair tress was obtained and shown in Table 8 below. The color difference measurement was repeated 10 times for each value and the average value was recorded. The smaller the difference between the above values, the better the leveling property.

comparative example Example One 2 3 4 5 6 7 8 One 2 3 4 5 6 7 dL ( black hair -White mother) 5.49 8.55 6.78 6.64 7.02 6.57 7.82 4.89 4.58 4.82 3.18 5.08 4.98 4.91 4.92

Referring to Table 8, in the case of Comparative Example 2, in which the pH of the hair dye composition is high because it does not contain a component for adjusting the pH of the hair dye, excessive color development proceeds in bleached hair and uniform dyeing is not achieved, and lactic acid, an organic acid, is used. Even in the case of Comparative Example 3, improvement in leveling properties could not be confirmed. In addition, it can be seen that even in the case of Comparative Examples 4 to 7, which are out of the range of the proper combination ratio of ammonia and tromethamine or monoethanolamine, the leveling property is poor. In particular, it can be seen that in Comparative Example 7, where the combination ratio of ammonia and monoethanolamine is 1:2, which is less than the proper combination ratio, the leveling property is greatly reduced.

On the other hand, in the case of Examples 1 to 7 in which ammonia and tromethamine, and at least one of tromethamine, ammonium carbonate and ammonium bicarbonate, or monoethanolamine were mixed in an appropriate ratio according to the present invention, Comparative Examples 1 to 7 It was confirmed that the contrast uniformity was greatly improved.

[Test Example 5] Evaluation of irritation odor

The hair dye composition prepared in the reference example was applied to an experimental human white hair tress, and the irritating smell felt while being left for 30 minutes, which is a typical hair dye leaving time, was evaluated. Ten panelists were evaluated according to the criteria of ◎ no irritant odor / ○ normal / △ irritant odor / × irritant odor, and the results are shown in Table 9 below.

comparative example Example One 2 3 4 5 6 7 8 One 2 3 4 5 6 7 irritating odor ○ ○ ○ ○ △ ○ ◎ ○ ○ ○ ○ ○ ◎ ○ ◎

Since the amount of ammonia water contained in the hair dye composition prepared in the reference example is the same except for Comparative Example 5, most of the irritants were evaluated to be of a similar degree. However, in Comparative Example 7 and Examples 5 and 7, a significant amount of ammonia was replaced with monoethanolamine, and the irritating odor caused by ammonia was eliminated. However, in Example 6 in which the combination ratio of ammonia and monoethanolamine was 7:1 Compared to Examples 5 and 7, there was a slight irritating odor caused by ammonia, and in the case of Comparative Example 8, in which the combination ratio of ammonia and monoethanolamine exceeded the appropriate combination ratio, there was little effect of reducing the irritating odor of ammonia by replacing monoethanolamine. can confirm that

Claims (13)

a first agent containing an oxidation dye precursor, a coupler, and an alkali agent; And in the oxidation type hair dye composition composed of a second agent containing an oxidizing agent,
At least one selected from the group consisting of ammonia as an alkali agent in the first agent and ammonium carbonate and ammonium bicarbonate as a pH buffer; and tromethamine;
At least one selected from the group consisting of ammonium carbonate and ammonium bicarbonate is included in an amount of 0.1 to 10% by weight based on the total weight of the first agent composition, but an amount that adjusts the pH of the hair dye composition to the range of 9.0 to 9.8. Contained in, oxidative hair dye composition. The oxidation type hair dye composition according to claim 1, further comprising monoethanolamine in the first agent. The oxidation type hair dye composition according to claim 1, wherein the ammonia is included in an amount of 0.02 to 10% by weight based on the total weight of the first agent composition. The oxidation type hair dye composition according to claim 1, wherein the tromethamine is included in an amount of 0.01 to 20% by weight based on the total weight of the first agent composition. The oxidation type hair dye composition according to claim 2, wherein the monoethanolamine is included in an amount of 0.05 to 15% by weight based on the total weight of the first agent composition. The oxidation type hair dye composition according to claim 1, wherein the combination ratio of ammonia and tromethamine is 2:1 to 6:1 by weight. The oxidation type hair dye composition according to claim 2, wherein the combination ratio of the ammonia and monoethanolamine is 3:1 to 10:1 by weight. The oxidation type hair dye composition according to claim 1, characterized in that the combination ratio of at least one selected from the group consisting of ammonium carbonate and ammonium bicarbonate and tromethamine is 1:1 to 3:1 in weight ratio. The oxidation-type hair dye composition according to claim 1, wherein the hair dye composition reduces scalp irritation and hair damage. The oxidation type hair dye composition according to claim 1, wherein the hair dye composition has improved dyeing durability. The oxidative type hair dye composition according to claim 1, wherein the hair dye composition has improved leveling properties. delete delete