JP5529359B2 - Oxidative hair dye composition - Google Patents

Description

Industrial application fields

  The present invention relates to an oxidative hair dye, and more particularly to an oxidative hair dye composition that is excellent in hair damage prevention effect and leveling property.

  2. Description of the Related Art Conventionally, as a hair dye, a two-component oxidative hair dye comprising a first agent containing an oxidative dye and an alkaline agent and a second agent containing an oxidant has been widely used. In this hair dye, a colorless low-molecular-weight oxidative dye is allowed to penetrate into hair, and oxidative polymerization is performed in the hair to produce and dye a pigment. This oxidation hair dye is very convenient because it can dye hair in various colors according to demand, and also has excellent hair dyeing power, and is widely used.

Problems to be solved by the invention

  In recent years, with the diversification of hairstyles, the hair has been increasingly chemically treated with hair dyes, bleaches, permanent wave agents, hair straighteners, etc., and these treatments are considered to be one of the causes of hair damage. ing. Once it is attempted to dye hair that has undergone such a chemical treatment, the conventional oxidative hair dye will further impose a burden on the hair due to the hair coloring treatment, and may damage the hair. There was a problem.

  Therefore, there is a method of dyeing hair with an acidic oxidative hair dye that does not use an alkaline agent, but there is a problem that a vivid color tone is difficult to obtain with an acidic oxidative hair dye, or uneven dyeing tends to occur.

Means for solving the problem

  The present inventor has conducted extensive research in view of the above-mentioned circumstances, and as a result, by adjusting the pH and alkalinity to specific ranges in the oxidative hair dye, oxidative dyeing that prevents hair damage and is excellent in levelness. The present inventors have found that a hair composition can be obtained and have completed the present invention. That is, the present invention contains an oxidation dye, an alkaline agent, and an oxidizing agent, and has an alkalinity defined by pH 7.5 to 8.9, 0.1N acid standard solution consumption of 0.3 to 0.8 ml / g. The present invention provides an oxidative hair dye composition characterized by the above. Hereinafter, the present invention will be described in more detail.

  The oxidation dye used in the present invention is usually divided into a main intermediate and a coupler. Examples of the main intermediate include one or more of phenylenediamines, aminophenols, diaminopyridines, and the like and salts thereof. Examples of the salt include hydrochloride, sulfate, acetate and the like. Among these, p-phenylenediamine, toluene-2,5-diamine, N, N-bis (β-hydroxyethyl) -p-phenylenediamine, 2- (β-hydroxyethyl) -p-phenylenediamine, N- ( β-hydroxyethyl) -N-ethyl-p-phenylenediamine, N-phenyl-p-phenylenediamine, 4,4′-diaminodiphenylamine, 2-chloro-p-phenylenediamine, N, N-dimethyl-p-phenylene Hair coloring ability of diamine, p-aminophenol, o-aminophenol, p-methylaminophenol, 2,6-dichloro-p-phenylenediamine, p-aminophenylsulfamic acid, 2,5-diaminopyridine and salts thereof From the point of view, it is preferable. The blending amount is usually 0.01 to 15% by weight, preferably 0.1 to 10% by weight, based on the total weight of the first agent.

  As couplers, resorcin, pyrogallol, catechol, m-aminophenol, m-phenylenediamine, 2,4-diaminophenol, 1,2,4-benzenetriol, toluene-3,4-diamine, toluene-2, 4-diamine, hydroquinone, α-naphthol, 2,6-diaminopyridine, diphenylamine, 2-methylresorcin, N, N-diethyl-m-aminophenol, phenylmethylpyrazolone, 3,3′-iminodiphenol, 1, 5-dihydroxynaphthalene, 5-amino-o-cresol, diphenylamine, p-methylaminophenol, phloroglucin, 2,4-diaminophenoxyethanol, gallic acid, tannic acid, ethyl gallate, methyl gallate, propyl gallate, pentaploid, 1-Metoki -2-amino-4- (2-hydroxyethyl) aminobenzene, 5- (2-hydroxyethylamino) -2-methylphenol and salts thereof can be formulated. The blending amount is usually 0.01 to 10% by weight relative to the total weight of the first agent, and if it is less than 0.01% by weight, sufficient dyeability cannot be obtained, and even if it exceeds 10% by weight, The effect remains the same and is not economical. Furthermore, 0.1 weight%-5 weight% is preferable, and the more outstanding dyeability is obtained by mix | blending 0.1 weight% or more. On the other hand, when it exceeds 5% by weight, the increase in dyeability is reduced. In addition, those listed in "Quasi-drug raw material standards" (issued in June 1991, Yakuji Nippo) can be used as appropriate.

  Furthermore, various color tones can be obtained by directly blending dyes. As the direct dye, known dyes such as tar pigments and natural pigments can be used, and one or two or more pigments may be used in combination. Among these, nitro dyes, azo dyes, nitroso dyes, triphenylmethane dyes, xanthene dyes, quinoline dyes, anthraquinone dyes, or indigo dyes can be mentioned. These compounding quantities are 0.01 to 10 weight% normally with respect to the total weight of a 1st agent. Specific examples include nitro-p-phenylenediamine, p-nitro-o-phenylenediamine, p-nitro-m-phenylenediamine, 2-amino-4-nitrophenol, 2-amino-5-nitrophenol, picramic acid. These are the acid dyes stipulated by their salts and the "Ministerial Ordinance for Determining Tar Colors that can be Used in Pharmaceuticals" (1960 Notification, Ministry of Health and Welfare). Red No. 2, Red No. 3, Red No. 102, Red No. 104 ( 1), red 105 (1), red 106, red 201, red 227, red 230 (1), red 230 (2), red 231, red 232, red 401 Red 502, Red 503, Red 504, Red 506, Yellow 4, Yellow 5, Yellow 202 (1), Yellow 202 (2), Yellow 203, Yellow 402 Yellow 403 (1), Yellow 406, Yellow 407, Orange 205, Orange 207, Orange 402, Green 3, Green 204, Green 205, Green 401, Green 402, Brown 201, purple 401, blue 1, blue 2, blue 202, blue 203, blue 205, black 401 and the like.

  Examples of the alkali agent include ammonia, monoethanolamine, diethanolamine, triethanolamine, monoisopropanolamine, diisopropanolamine, alkanolamines such as triisopropanolamine, sodium hydroxide, potassium hydroxide and the like. It can mix | blend combining a seed | species or 2 or more types. Among these, it is preferable to contain at least ammonia from the viewpoint of hair dyeing power.

  Furthermore, it is preferable to add a buffering agent to provide a buffering action. As the buffer, organic acids, inorganic acids, and salts thereof can be used. Examples of the organic acid include citric acid, glycolic acid, succinic acid, tartaric acid, lactic acid, fumaric acid, malic acid, levulinic acid, butyric acid, valeric acid, oxalic acid, maleic acid, mandelic acid, and the like. Examples include hydrochloric acid, phosphoric acid, sulfuric acid, nitric acid, and carbonic acid. Examples of these salts include sodium salts, potassium salts, ammonium salts, alkanolamine salts such as triethanolamine salts, and the like. Among these, ammonium salts of inorganic acids are preferable, and it is particularly preferable to mix one or more selected from ammonium chloride, ammonium sulfate, ammonium nitrate, and ammonium hydrogen carbonate.

  Examples of the oxidizing agent used in the present invention include hydrogen peroxide, urea peroxide, sodium percarbonate, sodium sulfate / hydrogen peroxide adduct, sodium pyrophosphate / hydrogen peroxide adduct, and the like. Among these, it is preferable to contain at least hydrogen peroxide from the viewpoint of hair dyeing power. The blending amount is such that the concentration during use is 0.5 to 1.5% by weight. If the concentration at the time of use is less than 0.5% by weight, sufficient hair dyeing power cannot be obtained, and if it exceeds 1.5% by weight, the hair tends to be damaged.

  The pH (measured as a 1% by weight aqueous solution) of the oxidative hair dye composition of the present invention is 7.5 to 8.9. If the pH is less than 7.5, uneven dyeing tends to occur and a vivid color tone cannot be obtained. When the pH exceeds 8.9, the hair is easily damaged.

  In addition, the oxidative hair dye composition of the present invention has an alkalinity defined by a consumption amount of 0.1N acid standard solution of 0.3 to 0.8 ml / g. If it is less than 0.3 ml / g, a vivid color tone cannot be obtained, and if it exceeds 0.8 ml / g, the hair tends to be damaged. Here, the consumption amount of the 0.1N acid standard solution is determined from the titration amount until the 1% by weight aqueous solution of the oxidative hair dye composition of the present invention is brought to pH 7.0.

  The oxidative hair dye composition of the present invention comprises a first agent containing an oxidative dye and an alkaline agent and a second agent containing an oxidant, and is a two-component type used by mixing at the time of use, or There is a so-called powder single-agent type that contains all these three components and dissolves in water when used. The first agent and the second agent of the two-component hair dye are usually mixed at a weight ratio of 2: 1 to 1: 5, and adjusted so that the pH and alkalinity after mixing are in the above ranges.

  In the present invention, as necessary, a cationized polymer, an anionic polymer, a nonionic polymer, an amphoteric polymer, a cationic surfactant, an anionic surfactant, a nonionic surfactant, and an amphoteric surfactant. An agent, a higher fatty acid, a higher alcohol, a hydrocarbon and a solvent can be blended.

  The cationized polymer is an aqueous solution containing an amino group or an ammonium group bonded to a polymer chain, or at least a dimethyldiallylammonium halide as a constituent unit, such as a cationized cellulose derivative, a cationic starch, or a cationized polymer. Examples include guar gum derivatives, diallyl quaternary ammonium salts / acrylamide copolymers, and quaternized polyvinyl pyrrolidone derivatives. Examples of commercially available cationized cellulose derivatives include Leogard G and GP manufactured by Lion Corporation, Polymers JR-125, JR-400, JR-30M, LR-400, and LR-30M manufactured by Union Carbide Corporation. Examples of other cationized cellulose derivatives include hydroxyethyl cellulose dimethyl diallylammonium chloride, and examples of commercially available products include Cellcoat H-100 and L-200 manufactured by National Starch and Chemical Co., Ltd. Examples of the cationized guar gum derivative are described in, for example, JP-B-58-35640, JP-B-60-46158, and JP-A-58-53996, Jaguar C-13S and -14S of RHONE-POULENC. It is commercially available as -17, -210, -162, and HI-CARE1000. Examples of the cationic diallyl quaternary ammonium salt / acrylamide copolymer include commercially available products such as Marcoat 100 and 550 manufactured by Calgon. As the quaternized polyvinyl pyrrolidone derivative, those having a molecular weight of 10,000 to 2,000,000 are preferable, and commercially available products include Guff Coat 734, 755, and 755N manufactured by ISP Japan.

  As an anionic polymer, acrylic acid / acrylic acid amide / ethyl acrylate copolymer, acrylic acid / acrylic acid amide / ethyl acrylate copolymer potassium salt solution, acrylic acid alkyl ester / methacrylic acid alkyl ester / diacetone acrylamide・ Methacrylic acid copolymer liquid, acrylic acid / alkyl methacrylate copolymer, acrylic resin alkanolamine liquid, carboxyvinyl polymer, hydroxypropyl acrylate, butylaminoethyl methacrylate, octylamide acrylate copolymer, vinyl acetate Crotonic acid copolymer, vinyl acetate / crotonic acid / vinyl neodecanoate copolymer, vinyl acetate / crotonic acid / vinyl propionate copolymer, methyl vinyl ether / maleic acid monobutyl ester copolymer, etc. .

  Nonionic polymers include natural, semi-synthetic and synthetic ones. Examples of natural nonionic polymers include cellulose, guar gum, agar, starch, hydrolyzed starch, and dextrin. Examples of the semisynthetic nonionic polymer include methyl cellulose, ethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxypropyl methyl cellulose, carboxymethyl dextran, and carboxymethyl chitin. Furthermore, synthetic nonionic polymers include polyethyl acrylate, polyacrylic amide, polyethylene glycol, polypropylene glycol, polyoxyethylene polyoxypropylene copolymer, polyoxyethylene polyoxypropylene decyl tetradecyl ether, polyoxy Ethylene polyoxypropylene butyl ether, polyoxyethylene polyoxypropylene hexylene glycol ether, polyoxypropylene butyl ether, polyvinyl pyrrolidone, polyoxypropylene glycol, dimethyl polysiloxane, phenylmethyl polysiloxane, polyether modified polysiloxane, amino modified polysiloxane, Examples include polyoxyethylene monostearate and polyoxyethylene distearate.

  Examples of the amphoteric polymer include N-methacryloylethyl N, N-dimethylammonium α-N-methylcarboxybetaine / butyl methacrylate copolymer (commercial name: Yucaformer AM-75; manufactured by Mitsubishi Chemical Corporation), hydroxypropyl acrylate・ Butylaminoethyl methacrylate / acrylic acid octylamide copolymer (commercial name; Amphomer 28-4910; manufactured by National Starch Co., Ltd.), dimethyldiallylammonium chloride / acrylic acid copolymer (commercial name; Marquat 280, 295; Calgon Co., Ltd.) ), Dimethyldiallylammonium chloride / acrylamide / acrylic acid terpolymer (commercial name: Marquat Plus 3330, 3331; manufactured by Calgon), acrylic acid / methyl acrylate / methacrylamidopropyltrimethylammo Um copolymer (trade name; Merquat 2001; manufactured by Calgon Co., Ltd.).

  Examples of cationic surfactants include quaternary ammonium salts. Specific examples include alkyltrimethylammonium chloride, lauryltrimethylammonium chloride, cetyltrimethylammonium chloride, cetyltrimethylammonium bromide, stearyltrimethylammonium chloride, bromide. Stearyl trimethyl ammonium, lauryl trimethyl ammonium bromide, dialkyl dimethyl ammonium chloride, dicetyl dimethyl ammonium chloride, distearyl dimethyl ammonium chloride, dicocoyl dimethyl ammonium chloride, myristyl dimethyl benzyl ammonium chloride, stearyl dimethyl benzyl ammonium chloride, ethyl lanolin sulfate fatty acid amino acid And propylethyldimethylammonium.

Examples of the anionic surfactant include the following.
1. Sulfate ester salt 1-1) Alkyl sulfate ester salt Lauryl sulfate sodium, lauryl sulfate triethanolamine, ammonium lauryl sulfate, sodium cetyl sulfate, sodium stearyl sulfate, etc. 1-2) Alkyl and alkyl allyl ether sulfate ester polyoxyethylene (hereinafter, Abbreviated as POE.) Sodium lauryl ether sulfate, POE lauryl ether sulfate triethanolamine, POE lauryl ether ammonium sulfate, POE alkyl ether sodium sulfate, POE alkyl ether sulfate triethanolamine, POE alkyl ether sulfate diethanolamine, POE alkyl ether ammonium sulfate, etc. 3) Sulfate ester salt of higher fatty acid ester salt 1-4, such as hydrogenated coconut oil fatty acid sodium glyceryl sulfate Sulfuric acid ester salts of higher fatty acid alkylol amide 1-5) 2 such as sulfated oils sulfated castor oil. Phosphate ester salt POE lauryl ether phosphate, POE oleyl ether phosphate, POE cetyl ether phosphate, POE stearyl ether phosphate, POE alkyl ether phosphate, POE alkyl phenyl ether phosphate, and salts thereof (sodium salt, triethanol Amine salts) and the like. Sulfonates 3-1) α-olefin sulfonates 3-2) sulfonates of higher fatty acid esters 3-3) sulfonates of higher fatty acid amides coconut oil fatty acid methyl taurine sodium, lauroyl methyl taurine sodium, etc. 3-4 ) Alkylbenzene sulfonate Dodecylbenzene sulfonate triethanolamine, etc. 3-5) Sulfosuccinate Sodium sulfosuccinate, disodium lauryl sulfosuccinate, disodium POE sulfosuccinate, disodium lauryl POE sulfosuccinate, POE lauroylethanolamide ester sulfosuccinate 3. disodium, undecylenoylamidoethyl sulfosuccinate, etc. Carboxylate 4-1) Condensate of higher fatty acid and amino acid N-acyl sarcosine salt such as sodium lauroyl sarcosine, N-lauroyl-L-sodium glutamate, N-stearoyl-L-glutamate disodium, N-myristoyl-L- N-acyl glutamates such as sodium glutamate 4-2) Fatty acid soap Sodium salts such as oleic acid, stearic acid, lauric acid, palmitic acid, potassium salts, triethanolamine salts or ammonium salts

Nonionic surfactants include the following.
1. 1. POE alkyl ether POE cetyl ether, POE stearyl ether, POE behenyl ether, POE oleyl ether, POE lauryl ether, POE octyldodecyl ether, POE hexyl decyl ether, POE isostearyl ether, etc. 2. POE alkyl allyl ether, POE nonyl phenyl ether, POE octyl phenyl ether, etc. 3. POE sorbitan fatty acid ester POE sorbitan monooleate, POE sorbitan monostearate, POE sorbitan monopalmitate, POE sorbitan monolaurate, POE sorbitan trioleate, etc. 4. POE glyceryl mono fatty acid ester monostearic acid POE glycerin, monomyristic acid POE glycerin, etc. 5. POE sorbitol fatty acid ester Tetraoleic acid POE sorbite, hexastearic acid POE sorbitol, monolauric acid POE sorbitol, POE sorbitol beeswax, etc. Castor oil, hardened castor oil derivative POE hardened castor oil, POE castor oil, etc. 7. POE fatty acid ester polyethylene glycol monooleate, polyethylene glycol monostearate, polyethylene glycol monolaurate, etc. 8. Higher fatty acid glycerin ester Lipophilic glyceryl monooleate, glyceryl monostearate monostearate, self-emulsifying glyceryl monostearate, etc. Sorbitan fatty acid ester sorbitan monooleate, sorbitan sesquioleate, sorbitan trioleate, sorbitan monostearate, sorbitan monopalmitate, sorbitan monolaurate, etc. Lanolin derivatives POE lanolin, POE lanolin alcohol, POE sorbitol lanolin, etc. 11. Alkyrolamide Lauric acid diethanolamide, coconut oil fatty acid diethanolamide, etc. 12. POE fatty acid amide POE stearic acid amide, etc. Sucrose fatty acid ester 14. Alkylamine oxide, dimethyl lauryl amine oxide, etc.

  Examples of amphoteric surfactants include glycine type amphoteric surfactants, aminopropionic acid type amphoteric surfactants, aminoacetic acid type amphoteric surfactants, and sulfobetaine type amphoteric surfactants. For example, 2-alkyl-N-carboxymethyl-N-hydroxyethyl imidazolinium betaine, lauryl dimethylaminoacetic acid betaine, undecyl carboxymethoxyethyl carboxymethyl imidazolinium betaine sodium, undecyl hydroxyethyl imidazolinium betaine sodium, undecyl -N-hydroxyethyl-N-carboxymethylimidazolinium betaine, alkyldiaminoethylglycine hydrochloride, stearyldihydroxyethylbetaine, stearyldimethylaminoacetate betaine, sodium stearyldimethylbetaine, bis (stearyl-N-hydroxyethylimidazoline) chlor Acetic acid complex, palm oil alkyl-N-carboxyethyl-N-hydroxyethylimidazolinium betaine sodium Coconut oil alkyl-N-carboxyethoxyethyl-N-carboxyethylimidazolinium disodium hydroxide, coconut oil alkyl-N-carboxymethoxyethyl-N-carboxyethylimidazolinium disodium hydroxide, coconut oil alkyl-N -Carboxymethoxyethyl-N-carboxyethylimidazolinium disodium lauryl sulfate, coconut oil alkylbetaine, coconut oil fatty acid amidopropylbetaine, coconut oil fatty acid-N-carboxymethoxyethyl-N-carboxyethylimidazolinium betaine sodium, lauryl Triethanolamine aminopropionate, sodium β-laurylaminopropionate, lauryl N-carboxymethoxyethyl-N-carboxymethylimidazolinium disodium salt Examples include canoyl sarcosine, sodium lauryldiaminoethylglycine, amidopropyl betaine laurate solution, lauryl sulfobetaine, and lauryl hydroxysulfobetaine.

  Examples of the higher fatty acid include oleic acid, myristic acid, lauric acid, stearic acid, isostearic acid, behenic acid, arachidic acid, arachidonic acid, linolenic acid, linoleic acid, and the like. can do.

  Examples of the higher alcohol include lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol, cetostearyl alcohol, behenyl alcohol, isostearyl alcohol, oleyl alcohol, 2-hexyldecanol, 2-octyldodecanol, 2-decyltetradecanol and the like. 1 type or 2 types or more can be mix | blended.

  Examples of the hydrocarbon include paraffin, liquid paraffin, light liquid paraffin, light liquid isoparaffin, heavy liquid isoparaffin, petrolatum, squalane, ceresin, microcrystalline wax, ozokerite, and pristane.

  Examples of the solvent include ethanol, isopropanol, propylene glycol, dipropylene glycol, 1,3-butylene glycol, isoprene glycol, hexylene glycol, ethyl carbitol, glycerin, diglycerin, polyethylene glycol, and polypropylene glycol. Or it can mix | blend in combination of 2 or more types.

  In the oxidative hair dye composition of the present invention, in addition to the above-mentioned components, other optional components usually used in the cosmetics field can be added within a range that does not interfere with the effects of the present invention. Examples of such optional components include collagen, keratin, elastin, fibroin, conchiolin, soy protein, casein, hydrolyzate obtained by hydrolyzing protein with acid, alkali, enzyme, etc., and quaternized cations thereof Polypeptides such as denatured proteins; moisturizers such as sodium pyrrolidone carboxylate, sodium lactate, sorbitol, hyaluronic acid; fats and oils such as castor oil, cocoa butter, mink oil, avocado oil, jojoba oil, macadamia nut oil, olive oil; Waxes such as whale wax, lanolin, carnauba wax, candelilla wax; fatty acid esters such as isopropyl myristate, hexyl laurate, cetyl lactate, oleyl oleate, hexadecyl 2-ethylhexanoate, octyldodecyl myristate; polyether modification Silicone derivatives such as silicone and alkyl-modified silicone; dyeing aids such as benzyl alcohol, phenethyl alcohol, benzyloxyethanol, N-methylpyrrolidone, N-ethylpyrrolidone, ethylene carbonate, propylene carbonate; liquid paraffin, solid paraffin, isoparaffin, squalane Hydrocarbons such as parabens; preservatives such as parabens; chelating agents such as EDTA-Na; stabilizers such as phenacetin and 8-oxyquinoline; antioxidants such as ascorbic acid, thioglycolic acid and sulfite; liquefied petroleum gas In addition, propellants such as dimethyl ether, nitrogen, carbon dioxide, etc .; vegetable oil extracts, herbal extracts, vitamins, dyes, fragrances, pigments, ultraviolet absorbers and the like.

  In the case of a two-component hair dye, the second agent includes stabilizers such as phenacetin and EDTA, nonionic surfactants, anionic surfactants, cationic surfactants, amphoteric surfactants, Cationized polymer, higher alcohol, hydrocarbon, fatty acid, wax, fats and oils, solvent, acid, pH adjuster, fragrance, liquefied petroleum gas, dimethyl ether, nitrogen, carbon dioxide gas propellant, etc. as necessary, Can be blended.

  The oxidative hair dye composition of the present invention can be produced according to a conventional method, and the dosage form of the two-component hair dye can be liquid, emulsion, cream, gel, paste, foam or the like. .

  Next, examples of the present invention will be described, but the present invention is not limited to the following examples.

Examples 1-2 and Comparative Examples 1-3
The oxidative hair dye compositions of Examples 1-2 and Comparative Examples 1-3 shown in Table 1 were prepared by a conventional method. Also, the first agent and the second agent are mixed at a weight ratio of 1: 1, and the pH of a 1% by weight aqueous solution of the mixture, the consumption amount of a 0.1N acid standard solution when titrated to pH 7.0, and oxidation The concentration of the agent was measured.

<Comparison test>
Human hair bundles mixed with white hair were dyed with the oxidative hair dye composition of Comparative Example 1 to prepare chemically treated hair. The operation of immersing this hair bundle in a 1% by weight sodium lauryl sulfate aqueous solution at 50 ° C. for 20 minutes was repeated 5 times to produce a hair bundle that faded after dyeing.

  The hair bundle subjected to the above chemical treatment is dyed using the oxidative hair dye composition of Examples 1 and 2 and Comparative Examples 1 to 3, and the feel after dyeing, leveling and vivid color A sensory evaluation was performed. The evaluation criteria are as shown below.

<Feel after hair dyeing>
○: Good △: Slightly bad ×: Poor <Uniformity>
○: Uniform dyeing △: Slightly uneven ×: Uneven <Color vividness>
○: Vivid color tone is obtained Δ: Slightly lacking in vividness x: Results lacking in vividness are shown in Table 1.

  From the results in Table 1, when the pH and alkalinity at the time of use exceeded the range of the present invention, the feel after hair dyeing was inferior, and when lower than the range of the present invention, the leveling property was inferior and the vividness of the color. I can see that it lacks.

Example 2
(First agent) Weight%
p-Phenylenediamine 5.0
m-aminophenol 0.3
2,4-Diaminophenoxyethanol hydrochloride 0.3
Hydroxyethylhydroxypropyltrimethyl ammonium chloride ether 1.5
POE (10) octyl phenyl ether 10.0
Sodium lauryl sulfate 5.0
Cetyltrimethylammonium chloride 3.0
Setosteric alcohol 8.0
Methylphenylpolysiloxane 5.0
Oleic acid 5.0
Polyethylene glycol 20.0
Ascorbic acid 0.5
28% Ammonia water Appropriate amount Purified water Appropriate amount (second agent) Weight%
Hydrogen peroxide 2.0
EDTA 0.5
Cetanol 2.0
Sodium lauryl sulfate 0.5
Phenacetin 0.1
Purified water

  The first and second oxidative hair dye compositions of Example 2 having the above composition were prepared by a conventional method, and the first and second agents were mixed at a weight ratio of 1: 1. At this time, the pH of the 1% by weight aqueous solution of the mixture was 8.4, the alkalinity was 0.4 ml / g, and the concentration of the oxidizing agent was 1% by weight. Further, when the same test as in Example 1 was performed, the same result as in Example 1 was obtained.

Example 3 wt%
p-Phenylenediamine 4.0
5-Amino-o-cresol 1.0
α-Naphthol 0.2
Hydroxypropyltrimethyl ammonium chloride guar gum 0.5
POE (10) oleyl ether 15.0
Myristyl alcohol 8.0
Liquid paraffin 2.0
Ascorbic acid 0.5
28% ammonia water appropriate amount ammonium hydrogen carbonate appropriate amount purified water appropriate amount

  The 1st agent of the oxidative hair dye composition of Example 3 of the said composition was prepared by the conventional method, and was mixed with the 2nd agent prepared in Example 2 by 1: 1 weight ratio. At this time, the pH of the 1% by weight aqueous solution of the mixture was 8.6, the alkalinity was 0.6 ml / g, and the concentration of the oxidizing agent was 1% by weight. Further, when the same test as in Example 1 was performed, the same result as in Example 1 was obtained.

Effect of the invention

  ADVANTAGE OF THE INVENTION According to this invention, the hair dye composition which prevents hair damage and is excellent also in leveling property can be provided.

Claims (5)

It contains an oxidation dye, an alkaline agent and an oxidizing agent, and has an alkalinity of 0.3 to 0.8 ml / g defined by the consumption of 0.1N acid standard solution at pH 7.5 to 8.9. An oxidative hair dye composition.
The oxidative hair dye composition according to claim 1, comprising at least ammonia as an alkaline agent.
The oxidative hair dye composition according to claim 1 or 2, comprising 0.5 to 1.5% by weight of an oxidant.
The oxidative hair dye composition according to claim 1, comprising at least hydrogen peroxide as an oxidant.
Furthermore, the oxidizing hair dye composition of any one of Claims 1-4 containing the buffer chosen from organic acid, inorganic acid, and these salts .