JPS62126114A - Hair dye - Google Patents

Abstract

PURPOSE:A hair dye, containing 5-dihydroxynaphthalene and 2,4-diaminophenol as active ingredients and capable of coloring by oxidation with air and dyeing the hair to a natural hue, having improved dyeability, color fastness to daylight exposure and resistance to washing with ready usage. CONSTITUTION:A hair dye containing 2,4-diaminophenol and 1,5- dihydroxynaphthalene or a salt thereof as active ingredients. The amounts to be blended are preferably within 0.1-5% range respectively in view of hue and dyeability (density of color). If the blending ratio of the 2,4-diaminophenol is increased, the hue becomes brown. If the blending ratio of the 1,5- dihydroxynaphthalene is increased, the hue becomes black. The composition of the hair dye is particularly preferably the form of an aerosol product, etc., having improved preservation stability. Another dye, e.g. nitro dye, disperse dye, acid dye, etc., may be further blended to the combination recipe of the above-mentioned active ingredients for toning.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to hair dyes used for dyeing human hair. More specifically, the present invention can dye human hair to a natural tone of brown to blackish-brown, has excellent hair dyeing properties, sunlight fastness and washing resistance, causes little damage to the hair, and is easy to use. This invention relates to a simple air oxidation (auto-oxidation) one-component hair dye.

Conventional technology Various hair dyes have been known so far.

For example, (1), those using vegetable dyes such as henna and chamomile, +21. Those using organic metal salts such as bismuth tartrate and iron tannate, (3), copper, aluminum,
Items using metal salts such as iron or lead (4) Items using dyes such as acid dyes, basic dyes, metal-containing dyes, mordant dyes, disperse dyes or direct dyes, (5).

Those using an an-agent such as carbon black, and those using oxidative dyes such as (6), para-phenylene diamine, and para-aminophenol are already known.

However, (11 and (3)) have the drawbacks of weak color development and poor dyeability. (2) has an unnatural color tone, and the metal ions in the raw material have an adverse effect on permanent wave treatment later. Although (4) has the advantage of being able to obtain a variety of color tones, it generally has poor dyeability and often fades easily when washed.

(5) Since the pigment is simply physically attached and fixed to the hair, the abrasion fastness and washing fastness are very poor. Regarding (6), it has almost the best dyeability, color tone, sunlight fastness, washing fastness, etc. among conventionally known hair dyes, and is the mainstay of currently used hair dyes.

However, the hair dye (6) also has some drawbacks. Since hair dyes using oxidative dyes usually undergo an oxidative coloring reaction, it is essential to use an oxidizing agent in combination, and peroxides such as hydrogen peroxide, perborates, and percarbonates are used.

For this reason, commercially available hair dyes include one powder formula in which water is added and the inorganic peroxide salts undergo a decomposition reaction, and the other is a powder formula in which water is added and a two-part formula containing hydrogen peroxide is mixed at the time of use. There is a two-drug formula used.

Even in the case of dora, special equipment for mixing and operations that must be performed to mix uniformly are required.

Furthermore, this operation must be carried out immediately before hair dyeing, and there is a time constraint in that the hair dyeing must be completed promptly. In addition, all coloring peroxides are highly irritating to the skin, especially to the mucous membranes and eyes, and if they accidentally come into contact with the eyes, there is a risk of serious damage such as blindness. For this reason, we have developed oxidative dyes without using these oxidizing agents to make them usable as hair dyes. Dye compositions that satisfy these requirements have been studied, but all of them have shortcomings and are of low practicality. For example, resorcinol, catechol,
Even when polyhydric phenols such as pyrogallol are added to pomades and hair tonics, it takes several days to several weeks for the color to develop, the color tone is unnatural, and the dyeability is poor.

Problems to be Solved by the Invention The present inventors have developed an ideal hair dye that does not have the drawbacks of the various hair dyes known in the art as described above, that is, it is easy to use and eliminates gray hair. We have conducted a variety of research in order to obtain an air oxidation (auto-oxidation) l-component hair dye that has sufficient hiding properties, provides a natural color tone, is less likely to discolor or fade due to sunlight or washing, and does not use an oxidizing agent. Ta.

As a result, by combining specific dyes among known oxidation dyes, the air oxidation (auto-oxidation) type, which is not found in conventional hair dyes, develops color in a short time after application, resulting in natural color tone. We have discovered a one-part hair dye that does not come off even when washed.The present invention was completed.

Means to Solve the Problems Among the oxidative dyes commonly used in hair dyes, those that gradually develop color by themselves due to air oxidation include paraphenylene diamine or its salts (hereinafter referred to as its salts). (including salts), toluene-2,5-
Many of them are known, including diamine, para-aminophenol, ortho-aminophenol, para-methylaminophenol, 2,lt-diaminophenol, pyrogallol, catechol, hydroquinone, and resorcinol, but among these, 2,4-diaminophenol has no color development. It is particularly fast, developing color in a few minutes in alkaline solutions. With other oxidative dyes, even para-aminophenol, which develops color relatively quickly, requires several hours.

The present inventors attempted to develop an air-oxidized l-component hair dye using 2,4-diaminophenol, but the hair dye obtained using this dye alone had a fast color development rate, but the color tone was reddish-purple. The color is either reddish brown or reddish brown, which is an unnatural color for dyed gray hair. It also has poor dyeability, so it easily comes off when washed.

Therefore, we considered improvements to adjust this color tone and improve washing fastness, and tried using oxidation dyes other than 2,4-diaminophenol in combination with 2,4-diaminophenol. We have discovered a particularly excellent dye composition that has not been found in the past. The results are shown next.

Experimental method: Prepare the following hair dye, apply a certain amount to gray hair, and leave at room temperature for air oxidation. After 24 hours, wash with water and observe the dyeability (color depth) and color tone.

(Hair dye composition) The oxidation dye (toning component) used together with a total of 100 parts gave better dyeing properties than 2,4-diaminophenol alone.One component of the combination was catechol, 1. 5-dihydroxynaphthalene, para-aminophenol, para-methylaminophenol, para-phenylenediamine, toluene-2,
They were 5-diamine, N-phenylparaphenylenediamine, and the like.

Among these, the example in which two dyes, 1,5-dihydroxynaphthalene and paraphenylenediamine, were combined with 2,4-diaminophenol had particularly good color tone and dyeability.

However, in terms of color development and dyeing speed, paraphenylenediamine is clearly inferior to 1,5-dihydroxynaphthalene, and after applying the hair dye to gray hair,
After 10 minutes, the color is not sufficiently developed and most of it comes off when washed. On the other hand, 1,5-dihydroxynaphthalene starts to develop color after only 2 to 3 minutes, and reaches a sufficient color tone and dyeing property (color depth) as a hair dye after 10 minutes. Even after washing, there was almost no discoloration or fading. This is thought to be due to the difference in reaction rate and the lower solubility of the polymerized (condensed) dye produced by oxidation in water than in the case of other dye compositions.

The following Table 2 shows (1), 2,4-diaminophenol alone, (21,2,4-diaminophenol and various phenylene diamines, and (3+, 2.4-diaminophenol and 1,5-dihydroxynaphthalene). The results are the results of preparing hair dyes using the respective combinations of , , and , and after applying them for a certain period of time, leaving them at room temperature and allowing them to oxidize in the air, and observing the dyeability and color tone over time.

(Hair dye composition) ゛III! The inventors combined two types of dyes, 2,4-diaminophenol and 1゜5-dihydroxynaphthalene, and developed the color by oxidation with air to achieve sufficient dyeing in a short period of time. We were able to obtain a new, unprecedented hair dye that provides good adhesion and washing fastness.

It is known that 2,4-diaminophenol and 1,5-dihydroxynaphthalene are both used as coupler components to adjust color tone in ordinary hair dyes using oxidative dyes. However, these ingredients are known only in hair dyes in which they are used in combination with paraphenylene diamine or toluene-2,5-diamine, which are the main ingredients of oxidative hair dyes, and in which color is developed using an oxidizing agent. The hair dye of the present invention is different from ordinary oxidation dye type hair dyes,
Its greatest feature is that it develops color only with air without using an oxidizing agent such as hydrogen peroxide, and this is different from ordinary oxidation dye-type hair dyes that use the above two components as coupler components. . 2.4-diaminophenol and 1゜5
- Such a hair dye in combination with dihydroxynaphthalene is still completely unknown.

The above 2,4-diaminophenol of the hair dye of the present invention and 1
．． It is also possible to add other oxidation dyes, nitro dyes, disperse dyes, acid dyes, and other dyes to the 5-dihydroxynaphthalene combination formulation for color adjustment.

The amount of 2.4-diaminophenol and 1.5-dihydroxynaphthalene in the hair dye can be set arbitrarily, but considering the color tone and dyeability (color intensity), it is 0.1 to 5. % range is preferable. 2,4-
If the blending ratio of diaminophenol is increased, the color becomes brownish.1.
If the blending ratio of 5-dihydroxynaphthalene is increased, the color becomes black.

This hair dye has all pH ranges from acidic to alkaline.
Although it can be used for hair dyeing in the H range, the rate of color development and dyeing properties are much better in the alkaline range. In particular, from the viewpoint of protecting the hair and scalp, use in a neutral to slightly alkaline range is preferred.

The composition of the hair dye of the present invention can be applied to formulations used in ordinary hair cosmetics, such as pomades, hair creams, hair tonics, hair dyes, hair liquids, etc., and has particularly good storage stability. It can be suitably applied to aerosol products etc. with excellent properties. In addition to dyes, these formulations contain various surfactants, antioxidants, oils and fats, organic solvents, thickeners, polymers, fragrances, chelating agents, colorants, and (1) Conditioners, preservatives, propellants, etc. can be added.

Next, the hair dye of the present invention will be explained in more detail with reference to Examples.

Example 1. (Hair tonic) 2.4-diaminophenol 0.5 part 1.
5-dihydroxynaphthalene 0.5 parts Ethanol 50.0 parts Ammonium thioglycolate 0.1 parts Fragrance
0.1 part purified water
When a small amount of the composition with a total remaining amount of 100.0 parts or more was applied to gray hair and left to stand, the hair turned dark brown after a few minutes, and the color hardly changed or faded even after washing with shampoo.

Example 2. (Hair cream) 2,4-diaminophenol hydrochloride 0.2 parts 1.
5-dihydroxynaphthalene O, 1 part liquid paraffin 30.0 parts beeswax
5.0 parts Cetyl alcohol 5.0 parts Polyoxyethylene alkyl ether 5.0 parts Thioglycolic acid
Add an appropriate amount of triethanolamine to adjust the pH to 9.0.Purified water.Remaining volume: 100 parts.
．． When a small amount of the composition at a ratio of 0 parts or more was applied to gray hair and left to stand, the hair was dyed dark brown after about 10 minutes, and the color hardly changed or faded even after washing with shampoo.

Example 3. (Hair liquid) 2,4-diaminophenol sulfate 2.0 parts 1.
5-dihydroxynaphthalene 1.5 parts Polyoxypropylene butyl ether 20.0 parts Ethanol
40.0 copies EDTA
Q. 1 part fragrance
0.5 part sodium sulfite
0.1 part Add appropriate amount of sodium hydroxide to adjust pl+ to 8.0 Purified water Balance total 100
．． When a small amount of the composition at a ratio of 0 parts or more was applied to gray hair and left to stand, moderate hair styling ability was obtained and the hair was dyed black after a few minutes. Even after washing with shampoo, there was almost no discoloration or fading.

Example 4. (Aerosol mousse) 2.4-diaminophenol hydrochloride 0.2 parts 1.
5-dihydroxynaphthalene 0.3 parts Acrylic resin 0.5 parts Fatty acid alkanolamide 0.3 parts Polyoxyethylene alkyl ether O, 3g Ascorbic acid
0.2 parts ethanol
Adjust the PL+ to 10.0 by adding an appropriate amount of aqueous ammonia. Fill an aerosol can with 10.0 parts or more of the composition of a propellant (fluorocarbon gas) and spray it out in the form of foam. When a small amount of the product was applied to gray hair and left alone, the hair was dyed a grayish-black color after a few minutes, and the hair was properly styled. Even after washing with shampoo, there was almost no discoloration or fading.

Effects of the Invention 1. The one-component hair dye of the present invention containing 5-di-droxynaphthalene and 2,4-diaminophenol or its salt releases an oxidizing agent when applied to human hair. Even without using it, it can be immediately colored by air oxidation and dyed to a natural brown to blackish tone.Moreover, this dyed tone has excellent sunlight fastness, washing resistance, and abrasion fastness. Also, there is almost no damage to the hair.

Procedural amendment 60, :, -, 2R Showa year month day 1,! l! Display of 1985 Patent Application No. 2665
56 No. 2, Title of invention: Hair dye 3
, Relationship with the case of the person making the amendment Name of applicant: Kindai Kagaku Co., Ltd. 4, Agent 5, Date of amendment order: Voluntary 6 Subject of amendment Detailed explanation of the invention in the specification column 7
Ji, E(DrA) $ (""The statement in the specification is corrected as follows.

Claims (1)

[Claims] An air oxidation type one-component hair dye characterized by containing 1,5-dihydroxynaphthalene and 2,4-diaminophenol or a salt thereof.