JPS6145965B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to hair dyes. More specifically, among two-component oxidative hair dyes, the present invention relates to a liquid or cream-like first agent that is adjusted to be alkaline by containing a specific basic amino acid. It consists of a first agent whose main component is a paraphenylene diamine compound, which is an oxidation dye intermediate, and a second agent whose main component is an oxidizing agent such as hydrogen peroxide. In the so-called two-component oxidative hair dye, which is used in combination with the hair dye, the first component is adjusted to be alkaline by adding an alkaline agent. The addition of an alkaline agent swells the hair, making it easier for the oxidative dye intermediate to penetrate into the hair, and when mixed with the second agent, promotes the release of nascent oxygen, causing the oxidative dye intermediate to undergo oxidative polymerization and coloring. It is indispensable for its liquid property regulating effect when converted into substances, and conventionally organic amines such as alkylamines such as monoethylamine, diethylamine, and triethylamine, and alkanolamines such as monoethanolamine and diethanolamine have been used. In addition, ammonium hydroxide,
Inorganic alkalis such as sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate, sodium phosphate, sodium hydrogen phosphate, and sodium silicate have also been used infrequently. In this way, an alkaline agent is added as an essential ingredient to the first agent to maintain the pH at alkaline, but on the other hand, the presence of this alkaline agent irritates the scalp during the hair dyeing process and causes the dye solution to reach the scalp. It has the drawbacks of causing undesirable side effects such as adhesion of hair, having a negative effect on the keratin quality of the hair, making the hair dry and unnatural after dyeing, and making it difficult to comb. . The present invention has been developed as a result of intensive studies to improve the problems caused by the addition of alkaline agents in conventional two-component oxidative hair dyes. We have discovered that the above-mentioned drawbacks can be overcome by adding it to the first agent and adjusting the pH within a specific range. That is, the gist of the present invention is to provide a liquid or creamy oxidized product containing one or more basic amino acids selected from the group consisting of arginine, lysine, oxylysine, and histidine and having a pH adjusted to 8.0 to 12.0. It's a hair dye. Hereinafter, the present invention will be explained in more detail. The alkaline agent used in the hair dye of the present invention, that is, one or more basic amino acids selected from the group consisting of arginine, lysine, oxylysine, and histidine, is It may be of either right-handed or left-handed optical isomerism, and the amount used is 0.1 to 6 parts by weight based on the total weight of the first agent, and the pH value is in the range of 8 to 12. Ru. If the PH value is lower than this range, the dyeing of the hair dye will be insufficient, and if it is higher than this value, there is a risk of damaging the hair. Typical examples of the oxidation dye intermediate of the oxidation hair dye in the present invention include paraphenyl diamine, 2-
Examples include methylparaphenylenediamine, 2-nitroparaphenylenediamine, paraaminodiphenylamine, orthophenylenediamine, paraaminophenol, orthoaminophenol, among which paraphenylenediamine is the most representative. The amount used is approximately 0.5 to 10 parts by weight based on the total weight of the first agent. In preparing the first agent in the hair dye of the present invention, phenols such as aminophenols such as resorcinol and meta-aminophenol are used as a phenolic toning agent that can couple with the oxidative dye intermediate. Derivatives can be added. Further, it can be prepared in either a liquid form or a viscous cream form, and various auxiliaries are used in its preparation. That is, in liquid formulations, auxiliary agents for promoting the solubility of the oxidation dye intermediates, such as lower alkylene carbonates, lower alcohols such as ethyl alcohol and isopropanol, and additives such as carboxymethyl cellulose, hydroxyethyl cellulose, and sodium alginate, are used. Adhesive, sodium alkylbenzenesulfonate,
A dispersing agent such as polyoxyethylene alkyl phenyl ether, a wetting agent such as glycerin, an auxiliary agent such as propylene glycol, and a fragrance are blended. In addition, for viscous cream-like products, oil components such as cetanol, liquid paraffin, lanolin, refined wax, castor oil, etc. can be appropriately blended with the auxiliary agents used in preparing the above-mentioned liquid dosage forms. You can get it. As described above, the oxidative hair dye of the present invention contains one or more basic amino acids selected from the group consisting of arginine, lysine, oxylysine, and histidine as an alkaline agent in the first agent containing the oxidative dye intermediate. It is blended to make it alkaline and adjust the pH to a range of 8 to 12, and its action is milder than conventional products that use relatively strong alkaline agents. In addition, when hair is dyed using this together with a second agent whose main component is an oxidizing agent such as hydrogen peroxide, in combination with a phenolic toning agent,
To dye white hair robustly from black to blackish brown or brown, to have no unpleasant odor caused by a dye bath during hair dyeing, to cause no stinging to the scalp, and to suppress damage to hair after dyeing. Furthermore,
It has the advantage that the hue after dyeing is strong and stable, and the dyed finish is soft and moisturized with a mellow luster. Next, examples will be shown. In the description, "parts" represent "parts by weight." Example 1 Paraphenylene diamine 2 parts Resorcinol 1 part Polyoxyethylene nonyl phenyl ether 30 parts L-arginine 2 parts Isopropyl alcohol 5 parts Glycerin 5 parts Distilled water 55 parts Cream dye with pH adjusted to 9.8 Mix the composition with the same amount of 6% hydrogen peroxide solution,
After applying it evenly to gray hair and leaving it for 20 minutes at room temperature, the hair was thoroughly washed with shampoo. During the hair dyeing process, there was no irritation to the scalp, almost no staining of the scalp after dyeing was observed, and gray hair was dyed a solid blackish brown. Example 2 Paraphenylenediamine 2 parts Orthoaminophenol 0.5 parts Resorcinol 0.5 parts L-algin 1.0 parts L-lysine 1.0 parts Hydroxyethyl cellulose 2 parts Isopropyl alcohol 5 parts Glycerin 5 parts Distilled water 83 parts The pH was adjusted to 9.8. Using a liquid hair dye composition, gray hair was dyed in the same manner as in Example 1, and dyed to a strong black color. Further, no irritation to the scalp was observed during hair dyeing, and no staining of the scalp after hair dyeing was observed. Example 3 Paraphenylene diamine 1.5 parts Para-aminophenol 1.0 parts L-lysine 2.0 parts Polyoxyethylene nonyl phenyl ether
Using a liquid hair dye composition with a pH adjusted to 9.7, consisting of 30 parts isopropyl alcohol, 5 parts glycerin, 5 parts distilled water, and 55.5 parts, gray hair can be dyed to a strong brown color in the same manner as in Example 1. Ta. In addition, no irritation to the scalp during hair dyeing or staining of the scalp after hair dyeing was observed. Comparative Example 1 The effects on the scalp were compared between the hair dyes of Examples 1 to 3 and corresponding hair dyes containing a conventional alkaline agent instead of the alkaline agent, and the evaluation results shown in the following table were obtained.

[Table] Example 4 and Comparative Example 2 Comparative experiments were conducted using the basic amino acid of the present invention as an alkali agent and a conventional alkali agent in the first agent below, and the results shown in Table 1 were conducted. Obtained. Part 1 P-phenylenediamine 1.0% Propylene glycol 10.0 EDTA-Na 0.3 Sodium sulfite 0.5 Alkaline agent Make 100% with water until pH 10.0. Part 2: Hydrogen peroxide 6.0% Make 100% with water. Hair dyeing method Mix the first and second agents in a 1:1 ratio, apply to hair at room temperature, and leave for 20 minutes. Then, rinse thoroughly with 40°C water and dry.

[Table] Evaluation method (1) Finished dyeing The evaluation was conducted with 20 panelists, and the most common evaluation responses are shown in Table 1. 〇: Dye finish with a moist, mellow luster △: Dye finish that is slightly moist and lacks a mellow sheen Shampoo twice with shampoo (Sierina Moisture Shampoo for normal hair manufactured by Hoyu Co., Ltd.),
Next, the drying operation was repeated 30 times, and the dyed hair that was not subjected to the treatment was evaluated as follows. 〇: Excellent △: Slightly inferior ×: Inferior [] Light resistance Exposure of dyed hair to sunlight for 60 days (cumulative amount of solar radiation
27,000 cal/cm ² ) and was evaluated in the same manner as in [] above using dyed hair that was not subjected to the treatment.

Claims (1)

[Claims] 1. Contains one or more basic amino acids selected from the group consisting of arginine, lysine, oxylysine, and histidine, and has a pH of 8.0 to
A liquid or cream oxidation hair dye adjusted to 12.0. 2. The liquid or cream oxidative hair dye according to claim 1, which contains a phenolic toning agent.