JP2617340B2 - Hair dye composition - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a hair dye composition, and more particularly, to a hair dye composition which is excellent in dyeing and has very little damage to hair. .

(Prior art and its problems) Conventionally, the first hair dye containing an oxidation dye intermediate was used.
2. Description of the Related Art A two-part type oxidative hair dye consisting of an agent and a second agent containing an oxidizing agent is widely used. This hair coloring agent is a dye that causes a colorless low-molecular weight oxidation dye intermediate to penetrate into the hair and causes oxidative polymerization in the hair to form a pigment to dye the hair. However, these hair dyes can dye hair in various colors as desired, and
It is very convenient because its hair dyeing power is also excellent, but the hair dyeing treatment damages the hair, so the hair loses moisture and luster and the dyeing becomes unnatural color, giving a strange feeling to a third party In addition, there is a disadvantage that the hair is not supple due to poor combing.

Therefore, various compounding agents have been studied in order to improve such disadvantages, but in the case of a compounding agent capable of sufficiently preventing damage to the hair, the compound exhibits a strong hair dyeing power as a hair dye. In many cases, the effect of the hair dye itself is impaired, and further improvement is desired.

(Problems and Solution to the Invention) In view of the above-mentioned circumstances, the present inventor has found that in the hair dyeing treatment, the hair dyeing power is not adversely affected, the hair is prevented from being damaged, and the hair after dyeing is moistened and glossy. As a result of intensive studies with the aim of obtaining a hair dye composition that has a natural dyeing, it has been found that the object of the present invention can be achieved by blending a specific compound, and to complete the present invention. It has arrived.

That is, the gist of the present invention is that paraaminobenzoic acid, ethyl paraaminobenzoate, glyceryl paraaminobenzoate, isobutyl paraaminobenzoate, amyl paradimethylaminobenzoate, octyl paradimethylaminobenzoate, isooctyl paradimethylaminobenzoate, paradiethoxy. A hair dye composition comprising at least one compound selected from ethyl aminobenzoate and ethyl paradipropoxyaminobenzoate.

 Hereinafter, the configuration of the present invention will be described in detail.

The hair dye targeted in the present invention is an oxidative hair dye comprising a first agent mainly containing an oxidation dye intermediate and a second agent mainly containing an oxidant. Examples of the oxidation dye intermediate include phenylenediamines, aminophenols, toluylenediamines, aminonitrophenols, diphenylamines, diaminophenylamines, N-phenylphenylenediamines, diaminopyridines, and salts thereof. Or one or more of these. The compounding amount is, for example, about 0.01 to 10% by weight based on the total weight of the first agent. In addition, resorcin, pyrogallol, catechol, metaaminophenol, metaphenylenediamine and the like can be blended as a coupler. Further, those described in "Hair Coloring Material Standards" (Revised 3rd Edition, published in May 1985, published by Japan Hair Color Industry Association and Hair Dyeing Society) can be used. Furthermore, surfactants such as polyoxyethylene alkyl ether and polyoxyethylene alkylamine fatty acid amide; humectants such as glycerin and propylene glycol; oily components such as lanolin, squalane and liquid paraffin; stabilizers such as sulfites and ascorbic acid. , A thickening agent such as carboxymethylcellulose, an alkali agent such as ammonia or alkanolamine, a higher alcohol, a fragrance and the like can be appropriately compounded as required. On the other hand, the second agent contains an oxidizing agent such as hydrogen peroxide, urea peroxide, etc., and also includes stabilizers such as phenacetin and EDTA, surfactants, fats and oils, higher alcohols, acids, pH adjusters, and fragrances. And the like can be appropriately compounded as needed. When this hair dye is used, the first and second agents are mixed and applied to the hair immediately before the hair dyeing treatment.

The present invention relates to the above hair dye, wherein para-aminobenzoic acid, ethyl para-aminobenzoate, glyceryl para-aminobenzoate, isobutyl para-aminobenzoate, amyl para-dimethyl amino benzoate, octyl para-dimethyl amino benzoate, iso-octyl para-dimethyl amino benzoate, para-diethoxy. It is an essential requirement that at least one compound selected from ethyl aminobenzoate and ethyl paradipropoxyaminobenzoate be blended. That is, by compounding these compounds, hair dyeing treatment can be performed while preventing damage to the hair, and a robust color tone can be obtained. The compounding amount of these compounds is usually 0.01 to 10% by weight, preferably 0.05 to 5% by weight based on the total amount of the hair dye. If the amount is less than 0.01% by weight, it is difficult to sufficiently prevent hair damage, and it is difficult to obtain moist and shiny hair. Conversely, if the amount is more than 10% by weight, there is no significant difference in the effect. Not economic.

(Examples) Next, the present invention will be described more specifically with reference to examples, but the present invention is not limited to the following examples unless it exceeds the gist.

Example 1 First agent p-phenylenediamine 1.0% propylene glycol 10.0% EDTA-Na 0.3% sodium sulfite 0.5% para-aminobenzoic acid 0.1% ammonia Amount to become pH 10.0 Make 100% with purified water.

Second agent Hydrogen peroxide 6.0% Make 100% with purified water.

The hair dye of the present invention having the above composition was prepared, the first agent and the second agent were mixed at a ratio of 1: 1, and this was mixed at room temperature with panelists (A to E 5).
) Was applied to the other half of the hair of the same panel as a control, with the same hair dye except that paraaminobenzoic acid was omitted from the above hair dye for comparison.

Then, after both hair dyes were applied, the hair was left for 20 minutes, and then the hair of each panelist was sufficiently rinsed with warm water at 40 ° C., and then dried. With respect to the hair of each paneler after the hair dyeing treatment, dyeing, finishing of the hair, and damage to the hair of the example with respect to the control example were performed according to the following criteria, and the results shown in Table 1 were obtained.

<Evaluation Criteria> (1) Dyeing ○: The example is a glossy dyeing as compared with the control example, and the gloss is maintained.

Δ: Dyeing of the example and the control was comparable. ×: Dyeing of the example lacking in gloss compared to the control. (2) Finishing of hair ○: The example was more supple than the control. Good combability Δ: flexibility of Example and control example, comparable degree of combability ×: less flexibility in Example than in Comparative Example,
Poor combability (3) Damage to hair The surface of the hair was observed with an electron microscope (3000 times magnification) to evaluate the degree of damage to the hair dermal.

：: Example has less damage as compared to control example Δ: Example and control example have similar damage ×: Example has more damage than control example Example 2 First agent p-phenylenediamine 1.0% propylene glycol 10.0% EDTA-Na 0.3% sodium sulfite 0.5% ethyl paraaminobenzoate 0.2% ammonia Amount to reach pH 10.0 Make up to 100% with purified water.

Second agent Hydrogen peroxide 6.0% Make 100% with purified water.

The hair dye of the present invention having the above composition was prepared, and the first and second agents were mixed at a ratio of 1: 1.
Name), and for comparison, a similar hair dye except that ethyl paraaminobenzoate was omitted from the above hair dye as a control was applied to the other half of the hair of the same paneler under the same conditions. .

Then, after both hair dyes were applied, the hair was left for 20 minutes, and then the hair of each panelist was sufficiently rinsed with warm water at 40 ° C., and then dried. The same evaluation as in Example 1 was performed on the hair of each paneler after the hair dyeing treatment, and the results shown in Table 2 were obtained.

Example 3 First Agent 2nd agent The first and second cream hair dyes of the above composition are:
The mixture was mixed in 1 and applied to gray hair, left at room temperature for 20 minutes, and then washed with shampoo. As a result, as in Examples 1 and 2, the dye was excellent in dyeing, and the hair was dyed into a strong blackish brown with good finish.

Example 4 First Agent 2nd agent The first and second gelled hair dyes having the above composition were mixed at a ratio of 1: 1 and applied to white hair. After standing at room temperature for 20 minutes, the hair was washed with a shampoo. As a result, as in Examples 1 and 2, the dye was excellent in dyeing, and the hair was dyed into a strong black with good finish.

Examples 5 to 8 In Example 3, the same amount of the compound of the present invention shown in Table 3 was blended in place of glyceryl paraaminobenzoate 1.0% in the composition of the first agent, and the others were completely the same as Example 3. When the hair was dyed in the same manner, no hair was damaged, and a robust hair dyeing excellent in dyeing was obtained.

(Effect of the Invention) According to the hair dye composition of the present invention, it is possible to prevent damage to the hair without impairing the dyeing effect as a hair dye, and as a result, moist and shiny natural color hair Can be obtained, and it has an excellent effect that combing is good. In addition, it has excellent fastness, particularly excellent fastness to sunlight.

Claims (1)

(57) [Claims] An oxidative hair dye comprising a first agent containing an intermediate of an oxidative dye and a second agent containing an oxidizing agent, wherein at least one or both of them comprises para-aminobenzoic acid, ethyl para-aminobenzoate, and para-aminobenzoic acid. One or more selected from glyceryl, isobutyl paraaminobenzoate, amyl paradimethylaminobenzoate, octyl paradimethylaminobenzoate, isooctyl paradimethylaminobenzoate, ethyl paradiethoxyaminobenzoate, ethyl paradipropoxyaminobenzoate A hair dye composition comprising: