JPH09278636A - Dyeing agent for hair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a dyeing agent for hair, at least harmless to human bodies, and having good dyeing effect and durability. SOLUTION: This dyeing agent for hair is obtained by adding and dissolving urea, benzyl alcohol and ethanol in an aqueous dye solution containing at least one dye of an acidic dye, a basic dye, a reactive dye and a disperse dye.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hair dye, and more specifically, at least one of dyes harmless to the human body selected from acid dyes, basic dyes, reactive dyes and disperse dyes.
The present invention relates to a safe and good dyeing agent for keratin-based fibers, which contains seeds and is capable of dyeing keratin-based fibers such as human hair and wool at low temperature for a desired color tone and concentration for a long time.

[0002]

2. Description of the Related Art The most commonly used hair dyes in the past are mainly composed of phenylenediamine-based oxidative dyes. These oxidative dyes not only cause allergic diseases but also cause hair dyeing. Since it requires an alkali and a hydrogen peroxide solution that cause skin irritation and hair damage, it is not preferable in terms of safety and convenience in use. Therefore, there is a demand for other hair dyes that do not use phenylenediamine-based oxidative dyes, and in recent years hair dyes that use relatively safe reactive dyes, disperse dyes, etc. have been proposed. Is starting to appear. However, these proposed hair dyes using reactive dyes and disperse dyes have poor dyeing properties to keratin fibers at room temperature, and fibers are pretreated with a mercaptan reducing agent such as thioglycolate. However, it has been difficult to obtain a hair dye capable of dyeing hair to a satisfactory dyeing concentration in a temperature range and a pH range that can be used for the human body.

On the other hand, as a low temperature dyeing method for dyeing wool at a temperature of 100 ° C. or lower, it is known to add a solvent such as benzyl alcohol or a swelling agent such as urea to a dyeing bath. There is. Here, the solubility of benzyl alcohol in water is at most 3.0% (W / V), so the addition amount is usually 0.1 to 3.0% by volume, and in the case of urea 5 to 40% by weight. (W / V), in addition, in any case, the bath temperature must be 70 ° C. or higher, and a sufficient dyeing effect cannot be obtained by dyeing human hair at a temperature near room temperature or body temperature. It also has low washing resistance and abrasion resistance, and has the drawback that it can be easily decolorized by washing with a detergent.

[0004]

As a solution to these problems, an aqueous dye bath containing one or more dyes selected from the group consisting of acid dyes, basic dyes, reactive dyes and disperse dyes. In addition, a dyeing agent for keratin-based fibers, which is characterized in that urea and benzyl alcohol are added and dissolved, has been developed (JP-A-52-91028).
issue). By using this dyeing agent, keratin fibers such as human hair and wool can be dyed well at low temperature.
However, this dyeing agent has not reached the level intended by the present inventors, particularly in terms of dyeing power and durability of the dye. Therefore, an object of the present invention is to provide a hair dyeing agent which achieves a remarkable dyeing effect and has extremely good durability.

[0005]

Means for Solving the Problems The inventors of the present invention have disclosed in Japanese Patent Laid-Open No.
The present invention has been completed by discovering that the above object can be sufficiently achieved by further adding and dissolving ethanol to the dyeing agent described in JP-A 2-91028.
Therefore, according to the present invention, urea, benzyl alcohol and ethanol are added and dissolved in an aqueous dye bath containing at least one dye selected from the group consisting of acid dyes, basic dyes, reactive dyes and disperse dyes. A hair dye is provided.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail. In the hair dye of the present invention, urea is 0.
1 to 10% by weight, benzyl alcohol is 10 to 20% by weight, and ethanol is preferably added and dissolved within the range of 10 to 30% by weight, and a penetrant, a dispersant, a fragrance, a viscosity adjusting agent, a pH adjusting agent. , It is desirable to further add additives such as UV absorbers, and a dye that is particularly safe for the human body is selected and contained, and the pH is adjusted within the range of 2 to 10 according to the dye. Is desirable.

The dyes used in the present invention are acid dyes, basic dyes, reactive dyes, which have no harmful effect on the human body.
It can be arbitrarily selected from disperse dyes, and it is posted in the "Ministerial Ordinance for Defining Tar Dyes that can be Used for Pharmaceuticals", which is allowed to be used for coloring medical products, quasi drugs, and cosmetics. The legal dyes mentioned above, or anthraquinone compounds, iridoid compounds, secoilide compounds, and the like are also included. For example, the following dyes can be used.

Red No. 104 (legal dye name, the same applies hereinafter),
Red No. 105, Red No. 106 (or more acid dye), Red No. 201 (acid dye), Red No. 206 (pigment), Red 2
No. 13 (basic dye), Red No. 227, Red No. 401,
Red No. 503, Red No. 504 (or more acid dye), Orange No. 402, orange No. 205 (or more acid dye), Yellow 4
No., Yellow No. 5, Yellow No. 203, Yellow No. 402, Yellow 40
No. 3 (above, acid dye), yellow No. 405 (oil soluble dye),
Green No. 3, Green No. 205, Green No. 402 (above, acid dye), Blue No. 1, Blue No. 2, Blue No. 203, Blue No. 205
No. (above, acid dye), purple No. 401 (acid dye), brown No. 201 (acid dye), black No. 401 (acid dye), etc.

The hair dye of the present invention is as described above.
Characteristically, urea, benzyl alcohol, and ethanol are added together to an aqueous dye bath containing one or more dyes selected from the group consisting of oxidation dyes, basic dyes, reactive dyes, and disperse dyes. By this, the above-mentioned remarkable effect is exhibited. The reason why such an effect is obtained is probably that the coexistence of urea and ethanol markedly increased the solubility of benzyl alcohol, which increased the dyeing power of the dye. Further, in the product of the present invention, the hair softening action of urea brings about an effect of giving the treated hair a rich texture such as smoothness and good finger feeling, but the reason for this has not been clarified yet.

The present inventors have conducted dyeing experiments on dyeing baths containing an oxidative dye, a basic dye, a reactive dye and a disperse dye alone and a dyeing bath containing two or more kinds of dyes, and added urea, benzyl alcohol and ethanol. Especially when added together within the above range, a low temperature that can withstand the human body (about 50 ° C or less)
In addition, a pH range that does not adversely affect the human body (about pH 2-1
It was confirmed in 1) that hair and other keratin fibers can be dyed extremely easily and semi-permanently to a desired color tone and density, and that this dye bath has no foul odor and has no harmful effect on the human body. .

Further, goat hair, keratinous fibers such as wool dyed with the hair dye of the present invention, and hair were subjected to a hot water washing test containing a detergent, a light resistance test and a rubbing test to examine the dye fastness. However, almost no decolorization or discoloration was observed, and it was also confirmed that almost permanent hair dyeing and dyeing can be achieved.

As described above, the dyeing agent of the present invention is effective for dyeing human hair and keratin fibers. However, in the dyeing agent of the present invention, the dyeing bath is set to a desired pH value depending on the type of the dyeing agent. It is desirable to adjust to. Examples of the pH adjuster there include organic acids such as citric acid, glycolic acid,
Examples thereof include succinic acid, tartaric acid, lactic acid, fumaric acid, malic acid, levulinic acid, butyric acid, valeric acid, oxalic acid, maleic acid, fumaric acid, and mandelic acid. Examples of inorganic acids include phosphoric acid, sulfuric acid, nitric acid, etc. Can be mentioned. Sodium hydroxide, potassium hydroxide, calcium hydroxide, monoethanolamine, dimethanolamine as a base,
Examples thereof include triethanolamine, aminodihydroxymethylpropanediol, 2-amino-2-methyl-1-propanol, 2-amino-2-methyl-1,3-propanediol and the like. In addition to this, a basic amino acid such as arginine can also be used, and further,
Coexistence of these acids and bases, for example sodium salt,
Alkanolamine salts such as potassium salt, ammonium salt and triethanolamine salt can be used.

Further, a penetrant for enhancing penetration and dispersion, a dispersant, particularly a thickener such as hydroxyethyl cellulose and silicones for improving adhesion to the hair of the dye bath when used as a hair dye. It is needless to say that it is possible to appropriately add a texture improver such as the above, and additives normally used in conventional cosmetics such as a fragrance, an antiseptic, an ultraviolet absorber, an antioxidant and a bactericide.

[0014]

EXAMPLES Next, the present invention will be described with reference to examples. The concentration of each component in the formulation was expressed on a weight basis, and was set to 100 parts or 100% as a whole. The evaluation of the product of the present invention and the comparative product was based on the following criteria. (1) Hair dyeability during dyeing (once with shampoo) About 1 g of a white hair bundle was coated with 1 g of the product of the present invention and the comparative product and left for 15 minutes. Then rinsed under running water, shampoo / rinse and dried. The dyed hair bundle was measured for L, a, and b values with a color difference meter (manufactured by Nippon Denshoku Co., Ltd.), the color difference (ΔE) from the undyed hair was determined, and the hair dyeability was evaluated. In addition, ΔE ₁ means that the larger the value is, the better the hair dyeing property is. (2) Feeling of hair at the time of dyeing hair (1 time of shampoo) About 1 g of a white hair bundle, 1 g of the present invention product and the comparative product It was applied and treated in the same manner as described above, and the finish was evaluated by 5 professional panelists. ◎: Very smooth with good finger contact ○: Smooth and with good finger contact △: Hair does not slip and is slightly rough ×: Has squeaky texture and is considerably rough

Examples 1 to 4, Comparative Examples 1 to 5 Hair dye compositions of the present invention (Examples 1 to 4) and comparative hair dye compositions (Comparative Examples 1 to 1) having the compositions shown in Table 1 below. 5)
Was prepared, and the dyeability of each hair dye composition and the feel of the hair after dyeing were evaluated, and these are shown in Table 1.

[0016]

[Table 1]

Example 5 (Preparation of black hair dye) Naphthol blue black (acid dye) 0.5% Orange II (acid dye) 0.2% Citric acid 0.5% Benzyl alcohol 15.0% Urea 7. 0% ethanol 20.0% polyoxyethylene nonylphenyl ether 0.1% (surfactant for penetrant) Purified water balance First, urea is dissolved in water, and benzyl alcohol is added to this to dissolve it. Dissolve naphthol blue black and orange II in this solution, add polyoxyethylene nonyl phenyl ether, and finally add citric acid to adjust the pH.
Adjusted to 3.0-3.5. When this dye bath is used for dyeing hair, the hair is washed, the above hair dye is applied thereto according to a conventional method, and the hair is left to stand at room temperature or under mild heating at 50 ° C. or lower for 10 to 30 minutes. Finally, wash and dry your hair. As a result, a permanent black hair dyeing was achieved. This dye bath can also be used for dyeing keratin-based fibers such as wool and goat hair by the same means, and good results were obtained.

Example 6 (Preparation of red hair dye) Rhodamine B (basic dye) 0.5% Aqueous ammonia (28%) 0.1% Benzyl alcohol 4.0% Urea 10.0% Ethanol 25.0 % Hydroxyethyl cellulose (thickener) 2.0% Perfume 0.05% Purified water balance Urea and then benzyl alcohol are dissolved in purified water, and hydroxyethyl cellulose is dissolved in this solution to give a viscous liquid, Rhodamine B and a fragrance | flavor were melt | dissolved in this, and pH was adjusted to 9.5-10.0 with ammonia water finally. This dyebath (red hair dye) is particularly suitable as a hair dye, and when applied in the same manner as in Example 1, a permanent red hair dye was achieved.

Example 7 (Preparation of orange hair dye) Procion Brilliant Red 2BS ^* 0.2% Procion Yellow RS ^* 0.2% Lactic acid 0.5% Benzyl alcohol 15.0% Urea 5.0% Ethanol 30. 0% Lauryl betaine (surfactant) 0.2% Hydroxyethyl cellulose 1.8% Purified water Remainder (* Reactive dye manufactured by ICI) Urea and then benzyl alcohol are dissolved in purified water and added to this solution. Hydroxyethyl cellulose was dissolved into a viscous liquid, and lauryl betaine, Procion Brilliant Red 2BS and Procion Yellow RS were dissolved, and finally the pH was adjusted to 3.0 to 3.5 with lactic acid.
As in Example 1, this dyebath could be used particularly suitably for hair dyeing.

Example 8 (Preparation of brown hair dye) Miketone Fast Brown ML ^** 0.5% Miketone Fast Black BGL ^** 0.2% Benzyl Alcohol 14.0% Urea 5.0% Ethanol 15. 0% Polyoxyethylene alkanolamide 0.1% (surfactant) Naphthalene sulfonic acid condensate (dispersant) 0.1% Perfume 0.05% (** is a disperse dye manufactured by Mitsui Chemicals, Inc.) Purified water Urea and then benzyl alcohol are dissolved, polyoxyethylene alkanolamide is dissolved in this solution, and Miketone Fast Brown ML and Miketone Fast Black BGL, which are previously dispersed in a naphthalenesulfonic acid condensate, are added thereto, and finally, Perfume was added.
This dyebath was originally suitable for dyeing hair and dyeing keratin fibers such as wool.

Example 19 (Preparation of Reddish Brown Hair Coloring Agent) Basic Black BN (Basic Dye) 0.1% Rhodamine B (Basic Dye) 0.2% Tartrazine (Acidic Dye) 0.1% Alizulol Purple (Acidic) Dye) 0.1% Benzyl alcohol 12.0% Urea 3.0% Ethanol 20.0% Citric acid 1.0% Sodium citrate 1.0% Hydroxyethyl cellulose 2.0% Purified water Remainder Urea in purified water , Benzyl alcohol, hydroxyethyl cellulose is dissolved in this solution to make a viscous liquid, to which basic black BN, rhodamine B, tartrazine, and alizrole purple are added,
Finally, the pH is 6.0 with citric acid and sodium citrate.
It was adjusted to 7.0. This dyebath was suitably used as a hair dye as in Example 1, and excellent results were obtained.

[0022]

According to the use of the hair dye of the present invention,
Dyeing power of the dye is remarkably improved, and durability is also very good.

Claims (1)

[Claims] 1. Urea, benzyl alcohol and ethanol are added and dissolved in an aqueous dye bath containing at least one dye selected from the group consisting of acid dyes, basic dyes, reactive dyes and disperse dyes. A dyeing agent for hair characterized by: