JPH01213220A - Hair dye composition - Google Patents

Abstract

PURPOSE:To obtain a hair dye having reduced stimulating odor and extremely few damage of head skin and hair, by using ammonia and alkanol amine together as alkali agent. CONSTITUTION:In the hair dye composition composed of the first agent essentially consisting of intermediate for oxidation dye and the second agent essentially consisting of oxidant such as hydrogen peroxide, as the alkali agent added to the first agent, ammonia and alkanolamine, e.g., tri- or diethanolamine, tri- or monopropanolamine, aminoalkylpropanediol or aminoalkylpropanol are used together and 1-10% ammonia present as 28wt.% ammonia water and 0.1-5wt.% alkanolamine are added to adjust pH of the first agent to 8-12. Hair can be sufficiently dyed even in reduced ammonia amount and the aimed hair dye composition is free from stimulating odor and gives no unpleasant feeling to users in dyeing treatment.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention relates to a hair dye composition, and particularly to a hair dye composition that has little irritating odor and causes very little damage to the scalp and hair. .

[Prior Art] A hair dye is a product that permeates an oxidative dye into the hair and causes oxidative polymerization in the hair to generate a pigment and dye the hair. Such hair dyes generally consist of a first agent containing an oxidation dye intermediate such as paraphenylenediamine as a main component, and a second agent containing an oxidizing agent such as hydrogen peroxide as a main component. There are agent compositions. Both sides are mixed and used when dyeing hair.

The first agent is usually made alkaline by adding an alkaline agent. The addition of this alkaline agent usually adjusts the pH of the mixture on both sides to 9 to 10 or higher to moisten the hair and facilitate the penetration of the oxidative dye intermediate into the hair, and also removes the nascent oxygen from the oxidizing agent of the second agent. It is indispensable for promoting the release and also for the liquid property regulating effect when the oxidative dye intermediate is oxidatively polymerized and converted into a colored substance. These alkaline agents include conventional organic amines, such as alkylamines such as monoethylamine, diethylamine, and triethylamine, alkanolamines such as monoethanolamine, and others.
Ammonia (ammonia water), sodium hydroxide, potassium hydroxide, sodium carbonate, etc. are used.

[Problems to be Solved by the Invention] However, since such alkaline agents are used in relatively large amounts, there are problems in that they irritate the scalp and adversely affect the keratin of the hair during hair dyeing. Ta. In addition, asimonia is especially preferable to use in terms of its chemical action, but the conventional blending ratio has the drawback of giving off a pungent odor that gives the user a sense of discomfort.

Therefore, the present invention aims to solve the above-mentioned problems.It has a sufficient hair dyeing effect, has little negative effect on the scalp and hair, and has a low amount of ammonia that does not irritate the hair. To provide a hair dye composition with little odor.

[Means for Solving the Problems] That is, the gist of the present invention is to provide a hair dye composition containing an oxidation dye intermediate and an alkaline agent, wherein the alkaline agent contains at least ammonia and an alkanolamine. A hair dye composition characterized in that:

Examples of the alkanolamine used in the present invention include triethanolamine, jetanolamine, tripropanolamine, dipropanolamine, motuprobanolamine, aminoalkylpropanediol, aminoalkylpropanol, and the like. When blending, one or more of these alkanolamines are selected and used. The blending amount thereof is preferably 0.0000% of the first agent.
It is 1 to 5% by weight. If it is less than 0.1% by weight, the amount of ammonia reduced is relatively small, and even if it exceeds 5% by weight, hardly any further reduction effect can be expected.

The amount of ammonia (as ammonia water with a concentration of 28% by weight) is preferably 1 to 10% by weight of the first agent,
If it is less than 1% by weight, the dyeing effect tends to decrease, and if it exceeds 10% by weight, the irritating odor starts to increase and the scalp and hair are easily damaged.

The total amount of alkanolamine and ammonia is preferably selected so that the pH of the first agent is 8 to 12. In this pH range, the negative effect on hair is particularly small and the dyeing effect is high.

Oxidation dye intermediates include phenylene diamines, aminophenols, tolylene diamines, aminonitrophenols, diphenylamines, diaminophenylamines, N-phenylphenyl diamines, diaminopyridine necks, etc., and salts thereof. When blending, one or more of these oxidation dye intermediates are selected and used. The blending amount thereof is preferably about 0.01 to 10% by weight of the first agent. If it is less than 0.01% by weight, the dyeing effect tends to decrease, and even if it exceeds 10% by weight, almost no further dyeing effect can be expected.

In addition, the couplers to be added to the first agent include resorcinol,
pyrogallol, catechol, meta-aminophenol 5,
Examples include metaphenylenediamine, and when blending, one or more couplers are selected and used from these couplers.

Furthermore, the first agent contains polyoxyethylene alkyl ether, polyoxyethylene alkyl amine, fatty acid amide, etc. as a surfactant, and glycerin, as a humectant.
Propylene glycol, etc., as oily ingredients, lanolin,
Squalane, liquid paraffin, etc., sulfites, ascorbic acid, etc. are used as stabilizers, carboxymethyl cellulose, etc. are used as thickeners, and in addition, higher alcohols, fragrances, etc. are appropriately selected and blended as necessary.

As the second agent, hydrogen peroxide, urea peroxide, and the like are blended as oxidizing agents corresponding to the first agent. Furthermore, zenacetin, EDTA, its salts, etc. are used as stabilizers, paraffin, etc. are used as oils and fats, and in addition, higher alcohols, surfactants, acids, pH adjusters, fragrances, etc. are appropriately selected and blended as necessary. Ru.

The mixing ratio of the first agent and the second agent is usually 2:1 to 1 by weight.
:2, but it is preferably around 1:1.

[Operations] Although the functions of each component of the present invention are not clear, it is thought that they may have the following functions.

In other words, when alkanolamine and ammonia coexist, due to their interaction, the scalp ◆
It is thought that the negative effect on hair will be reduced. Therefore, even if the dyeing effect is sufficient, the scalp and hair will not be damaged. Further, since pHFI can be adjusted with a small amount of ammonia, irritating odor is suppressed.

Since the present invention is constructed as described above, there is extremely little negative effect on the scalp during dyeing, and it can be dyed sufficiently even with a moderate amount of ammonia, and there is no irritating odor and it can be used during hair dyeing. No one feels any discomfort.

[Example] Next, the present invention will be explained in detail. The present invention is not limited to these, but includes various embodiments without departing from the gist thereof.

The components shown in Tables 1 to 4 as the first agent and the components shown in Table 9 or Table 10 as the second agent are mixed in the proportions shown in the table to produce a second agent, and using this, A panel of 10 people evaluated the irritating odor and the effect on the skin and hair. As a comparative example, the components shown in Tables 5 to 8 were used as the first agent. The conditions and results are shown in Table 11 and below.

Table 1 Table 2 Table 3 Table 4 Table 5 Table 6 Table 7 Table 8 Table 9 Table 10 The pH and properties of each of the above Examples were as shown in Table 11.

Table 11 The above first agent and second agent were mixed at a ratio of 1:1 by weight and applied to the gray hair of 10 panelists, left at room temperature for 20 minutes, and then washed with shampoo. Each evaluation at that time will be explained. The first agent of Example 1 and the first agent of Comparative Example 1 were mixed with the second agent shown in Table 9, and the first agent of Example 1 to
4 and Comparative Examples 2 to 4, the first agent was the second agent shown in Table 10.
mixed with the agent.

(1) Stimulating Odor The mixture was mixed by hand using a panel, and the odor of the mixture was evaluated. The results are shown in page 12.

Table 12 A: No irritating odor at all.

B: Almost no irritating odor.

C: Slightly irritating odor.

D: I feel a strong irritating odor.

(2) Scalp irritation A panel of 10 people divided their hair into left and right halves at the top of their heads, used the hair dye of the example on one side, and the comparative example on the other. compared. The results are shown in Table 13.

Table 13 A: I don't feel any irritation at all.

B: I hardly feel any stimulation.

C: Slight irritation felt.

D: I feel a strong stimulation.

(3) Hair damage
00x) to evaluate the degree of damage to the hair cuticle.
The results are shown in Table 4.

No. 14 A: No damage was observed.

B: Slight damage such as bumps, cracks, and peeling is observed in the hair epidermis.

C: Moderate damage such as bumps, cracks, and peeling is observed in the hair epidermis.

D: Significant damage such as bumps, cracks, and peeling is observed in the hair epidermis.

(4) Dyeability The dyeability was sufficient in both Examples and Comparative Examples.

As mentioned above, the hair dye composition of this example, like the comparative example, has sufficient dyeing properties, has extremely low hair/scalp irritation despite having the same pH, and has a high level of ammonia content. Since the amount is small, there is also less irritating odor.

Claims (1)

[Scope of Claims] 1. A hair dye composition containing an oxidation dye intermediate and an alkaline agent, wherein the alkaline agent is a mixture of at least ammonia and an alkanolamine. . 2. The hair dye according to claim 1, wherein the alkanolamine is one or more selected from triethanolamine, diethanolamine, tripropanolamine, dipropanolamine, monopropanolamine, aminoalkylpropanediol, and aminoalkylpropanol. Composition. 3 1 to 10% by weight of ammonia water with a concentration of 28% by weight,
The hair dye composition according to claim 1 or 2, which contains 0.1 to 5% by weight of alkanolamine and has a pH adjusted to 8 to 12.