JP5737877B2 - Acid hair dye composition and hair dyeing method using the same - Google Patents

Description

  The present invention relates to an acidic hair dye composition containing an acid dye. Specifically, by maintaining the pH of the hair after the hair dyeing treatment within a predetermined range, the feel of the hair due to the change in pH and the color tone of the oxidative hair dye are improved. The present invention relates to an acidic hair dye composition capable of suppressing discoloration and a hair dyeing method using the same.

  In general, an acidic hair dye composition containing, for example, an acid dye as a direct dye and used as a semi-permanent hair dye is known. On the other hand, an oxidative hair dye is known in which an oxidative dye penetrates into the hair cuticle by the action of an alkaline agent, and the oxidant decomposes the melanin pigment and colors the dye. The acidic hair dye composition develops color by ion-bonding a dye to a very shallow part of the cortex. The acidic hair dye composition has an advantage that damage to hair can be suppressed as compared with an oxidative hair dye.

  Conventionally, an acidic hair dye composition disclosed in Patent Document 1 is known. Patent Document 1 discloses an acidic hair dye composition containing an acid dye, glycolic acid, and the like and adjusted to pH 2.8 to 3.3 (see Table 1 and the like). With this configuration, it is possible to improve the hair dyeing power and further improve combing with respect to the hair after the hair dyeing treatment.

Japanese Patent Laid-Open No. 10-245327 Japanese Patent Laid-Open No. 10-273432 JP 2007-131568 A

  However, since the acidic hair dye composition disclosed in Patent Document 1 has a low pH, there is a problem that the feel of the hair after the hair dyeing treatment is poor. In addition, after the hair dyeing treatment with the acidic hair dye composition, the hair dyeing treatment is subsequently performed with the oxidation hair dye containing the oxidation dye, or after the hair dyeing treatment with the oxidation hair dye containing the oxidation dye, In the case of hair dyeing with an acidic hair dye composition, there has been a problem that the hair color tone of the oxidative hair dye causes discoloration due to pH fluctuation during treatment. Therefore, when the oxidative hair dye and the acidic hair dye composition are used repeatedly, it is necessary to use a dye remover containing a reducing agent as described in Patent Documents 2 and 3. When using a dye remover as described in Patent Documents 2 and 3, there are problems that the treatment is complicated, and that the feel of the hair may be reduced by the use of a reducing agent.

  As a result of intensive studies by the present inventors, the present invention uses a predetermined water-soluble polymer compound or the like in an acidic hair dye composition containing an acidic dye, and the hair pH after the hair dyeing treatment is within a predetermined range. It has been made by finding that the above problem can be solved by maintaining the above. The object of the present invention is to provide an acidic hair dye composition containing an acid dye, and an acidic hair dye composition capable of suppressing a decrease in touch due to a change in hair pH and a change in color tone of an oxidative hair dye, and the same. It is in providing the hair dyeing method using.

  In order to achieve the above object, the acidic hair dye composition of the invention according to claim 1 comprises (A) an ionic water-soluble polymer compound of 1.5 to 4.5% by mass, (B) an organic acid and 10% by weight aqueous solution of an acidic hair dye composition containing 0.005 to 1.5% by weight of a buffer composed of at least one selected from the salts and inorganic acids and salts thereof, and (C) an acidic dye The pH of the hair is 4-6, and the pH of the hair after dyeing is 5.5-6.

  The invention according to claim 2 is the acidic hair dye composition according to claim 1, wherein the organic acid is at least one selected from acetic acid, tartaric acid, citric acid, lactic acid, glycolic acid, and pyrrolidone carboxylic acid. It is characterized by that.

  The invention according to claim 3 is the acidic hair dye composition according to claim 1 or claim 2, wherein the (A) ionicity with respect to the content of the (B) buffer in the acidic hair dye composition. The mass ratio of the content of the water-soluble polymer compound is 1 to 750.

  The hair dyeing method of the invention described in claim 4 is the hair dyeing method using the acidic hair dye composition according to any one of claims 1 to 3, wherein the acid hair dye composition is used for hair dyeing. After the treatment, the hair is treated with an oxidative hair dye containing an oxidative dye.

The invention according to claim 5 is the hair dyeing method according to claim 4, wherein the oxidative hair dye has a pH of 7 to 9.5 in a 10% by mass aqueous solution of the oxidative hair dye. To do.
The invention according to claim 6 is a hair dyeing method using the acidic hair dye composition according to any one of claims 1 to 3, wherein the hair is treated with an oxidative hair dye containing an oxidative dye. Then, the hair dyeing treatment is performed with the acidic hair dye composition.

  The invention according to claim 7 is the hair dyeing method according to claim 6, wherein the oxidative hair dye has a pH of 7 to 9.5 in a 10% by mass aqueous solution of the oxidative hair dye. To do.

  ADVANTAGE OF THE INVENTION According to this invention, in the acidic hair dye composition containing an acidic dye, the fall of the touch accompanying the pH change of hair and the discoloration of the color tone of an oxidation hair dye can be suppressed.

Hereinafter, the embodiment which actualized the acidic hair dye composition of this invention is described in detail.
The acidic hair dye composition of the present embodiment contains (A) an ionic water-soluble polymer compound, (B) a buffering agent, and (C) an acidic dye, and further contains, for example, a penetration accelerator and an organic solvent. May be.

  (A) The ionic water-soluble polymer compound improves the feel of the hair after the hair dyeing treatment and improves the pH stability of the acidic hair dye composition. (A) Anionic, cationic, and amphoteric natural or synthetic polymers can be used as the ionic water-soluble polymer compound. Examples of the anionic polymer include gum arabic, gum karaya, gum tragacanth, sodium alginate, xanthan gum, modified xanthan gum, sodium carboxymethylcellulose, crosslinked polyacrylic acid, carboxyvinyl polymer, alkyl-modified carboxyvinyl polymer, polyacrylamide, acrylamide / acryloyldimethyltaurine. Salt copolymer, hydroxyethyl acrylate / acryloyl dimethyl taurate salt copolymer (commercial name; SIMULGEL NS, FL; manufactured by Seiwa Supply), acrylate / acryloyl dimethyl taurate salt copolymer (commercial name: SIMULGEL EG; (Manufactured by Seiwa Supply Co., Ltd.), and (acryloyldimethyltaurine salt / behenes-25 methacrylate) copolymer (commercial name: Aristofl) ex HMB; manufactured by Clariant Japan). Examples of the cationic polymer include a cationized cellulose derivative, a cationic starch, a cationized guar gum derivative, a diallyl quaternary ammonium salt / acrylamide copolymer, and a quaternized polyvinylpyrrolidone derivative. 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.) ), Terpolymer of dimethyldiallylammonium chloride / acrylamide / acrylic acid (commercial name; Marquat Plus 3330, 3331; manufactured by Calgon), and acrylic acid / methyl acrylate / methacrylamidopropyltrimethyl ammonium chloride Um copolymer (trade name; Merquat 2001; manufactured by Calgon Corporation).

  The content of the (A) ionic water-soluble polymer compound in the acidic hair dye composition is 1.5 to 4.5% by mass, preferably 2 to 3.5% by mass. If the content is less than 1.5% by mass, the feel and viscosity stability of the hair may be lowered. On the other hand, if the content exceeds 4.5% by mass, the feel of the hair may be lowered.

  (B) A buffering agent prescribes | regulates pH of an acidic hair dye composition to a predetermined range, and thereby exhibits the effect | action which fixes (C) acidic dye to hair protein. (B) A buffer is comprised as at least 1 type chosen from an organic acid and its salt, and an inorganic acid and its salt. Examples of the organic acid include acetic acid, tartaric acid, citric acid, lactic acid, glycolic acid, and pyrrolidone carboxylic acid. Examples of inorganic acids include hydrochloric acid, phosphoric acid, sulfuric acid, nitric acid, and carbonic acid. Examples of the acid salts include sodium salts, potassium salts, ammonium salts, and triethanolamine salts. Among these, citric acid, lactic acid, glycolic acid, and pyrrolidone carboxylic acid are preferable from the viewpoint of improving pH stability during long-term storage. Furthermore, lactic acid, glycolic acid, and pyrrolidone carboxylic acid are more preferable. In addition, the specific example of the said organic acid may be used independently, and may be used in combination of 2 or more type.

  The content of the buffer in the acidic hair dye composition is 0.005 to 1.5% by mass, preferably 0.01 to 1% by mass. If the content is less than 0.005% by mass, the pH stability and viscosity stability of the acidic hair dye composition may be lowered. On the other hand, if the content exceeds 1.5% by mass, the feel of the hair after the hair dyeing treatment may be lowered, and the storage stability of the acid dye may be affected.

  The mass ratio (A / B) of the content of the (A) ionic water-soluble polymer compound to the content of the (B) buffer in the acidic hair dye composition is preferably 1 to 750, more preferably 2 to 2. 350, more preferably 4.5-100. By prescribing within this range, the viscosity stability of the acidic hair dye composition during long-term storage can be further improved. Moreover, the fall of the feeling accompanying pH change can be suppressed more.

  (C) The acidic dye is blended for dyeing hair. This acid dye is non-reactive and can be colored by itself. Specific examples include acid dyes and the like specified by the “Ministerial Ordinance for Determining Tar Colors that can be Used in Pharmaceuticals” (1960 Notification, Ministry of Health and Welfare), such as Red No. 2, Red No. 3, Red 102, Red 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 Purple No. 401, Blue No. 1, Blue No. 2, Blue No. 202, Blue No. 203, Blue No. 205, and a brown No. 201, and black No. 401. In addition, the specific example of the said acidic dye may be mix | blended independently, and may be mix | blended in combination of 2 or more types.

  The content of the acidic dye in the acidic hair dye composition is preferably 0.001 to 1% by mass. When the content of the acid dye is less than 0.001% by mass, the hair dyeing effect may not be sufficiently obtained. On the other hand, when the content of the acid dye exceeds 1% by mass, the solubility in the acid hair dye composition may not be sufficiently obtained.

  The penetration enhancer improves the hair dyeing power of the acid dye. Therefore, the acidic hair dye composition preferably contains a penetration enhancer. Examples of the penetration accelerator include monohydric alcohols having 4 to 8 carbon atoms, ethylene glycol alkyl ethers, aromatic alcohols, cyclic alcohols, and lower alkylene carbonates. Examples of the monohydric alcohol having 4 to 8 carbon atoms include n-butanol, isobutanol, n-pentanol, n-hexanol, n-heptanol, and n-octanol. Examples of the ethylene glycol alkyl ether include ethylene glycol mono n-butyl ether. Examples of the aromatic alcohol include benzyl alcohol, 2-phenylethyl alcohol, cinnamyl alcohol, phenylpropanol, 1-phenoxy-2-propanol, phenyl diglycol, α-methylbenzyl alcohol, dimethylbenzyl carbinol, benzyloxyethanol, Examples include phenoxyethanol, phenoxyisopropanol, and p-anisyl alcohol. Examples of the cyclic alcohol include cyclohexanol. Examples of the lower alkylene carbonate include ethylene carbonate and propylene carbonate. Among the penetration enhancers, an aromatic alcohol is preferable from the viewpoint of being excellent in the effect of improving the hair dyeing power. The content of the penetration enhancer in the acidic hair dye composition is preferably 0.1 to 20% by mass, more preferably 0.5 to 15% by mass, and further preferably 1 to 10% by mass. If the content is less than 0.1% by mass, a sufficient effect of improving hair dyeing power may not be obtained. On the other hand, if the content exceeds 20% by mass, background stains may easily occur.

  The organic solvent improves the hair dyeing power of the acid dye. Therefore, the acidic hair dye composition preferably contains an organic solvent. Examples of the organic solvent include monohydric alcohols having 1 to 3 carbon atoms (lower alcohols), glycols and glycerols as polyhydric alcohols, and diethylene glycol lower alkyl ethers. Examples of the monohydric alcohol having 1 to 3 carbon atoms include methanol, ethanol, propanol, and isopropanol. Examples of glycols include ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, dipropylene glycol, isoprene glycol, hexylene glycol, and 1,3-butylene glycol. Examples of glycerins include glycerin, diglycerin, and polyglycerin. Examples of the diethylene glycol lower alkyl ether include diethylene glycol monoethyl ether (ethyl carbitol). Content of the organic solvent in an acidic hair dye composition becomes like this. Preferably it is 0.1-25 mass%, More preferably, it is 2-20 mass%, More preferably, it is 5-15 mass%. If the content is less than 0.1% by mass, a sufficient effect of improving hair dyeing power may not be obtained. On the other hand, if the content exceeds 25% by mass, background stains may easily occur.

  As for the pH of the acidic hair dye composition, the pH of a 10% by mass aqueous solution of the acidic hair dye composition is 4-6. By regulating the pH of the acidic hair dye composition within such a range, the pH inside the hair after dyeing can be maintained in a weakly acidic region that is the pH of the original hair, that is, in the range of 5.5-6. it can. The pH of the acidic hair dye composition can be adjusted using the aforementioned buffer and the pH adjuster described below.

  The acidic hair dye composition is, for example, water, a nonionic water-soluble polymer compound, an oil component, a surfactant, a sugar, a preservative, and a stabilizer, as necessary, within a range that does not impair the effects of the present invention. , Chelating agents, pH adjusters other than those described above, plant extracts, herbal extracts, vitamins, fragrances, ultraviolet absorbers, and antioxidants may be contained.

  Examples of the nonionic water-soluble polymer compound include hydroxyethyl cellulose, hydroxypropylmethyl cellulose, dextrin, guar gum, and polyvinyl pyrrolidone.

  The oily component imparts a moist feeling to the hair. Therefore, the acidic hair dye composition preferably contains an oil component. Examples of the oil component include fats and oils, waxes, higher alcohols, hydrocarbons, higher fatty acids, alkyl glyceryl ethers, esters, and silicones.

  Examples of oils and fats include olive oil, rosehip oil, camellia oil, shea fat, macadamia nut oil, almond oil, tea seed oil, sasanqua oil, safflower oil, sunflower oil, soybean oil, cottonseed oil, sesame oil, beef fat, cacao butter, corn Oil, peanut oil, rapeseed oil, rice bran oil, rice germ oil, wheat germ oil, pearl barley oil, grape seed oil, avocado oil, carrot oil, macadamia nut oil, castor oil, linseed oil, coconut oil, mink oil, and egg yolk Oil. Examples of the wax include beeswax, candelilla wax, carnauba wax, jojoba oil, and lanolin. Examples of the higher alcohol include lauryl alcohol, myristyl alcohol, cetyl alcohol (cetanol), stearyl alcohol, cetostearyl alcohol, aralkyl alcohol, behenyl alcohol, 2-hexyldecanol, isostearyl alcohol, 2-octyldodecanol, decyltetradecanol, Examples include oleyl alcohol, linoleyl alcohol, linolenyl alcohol, and lanolin alcohol.

  Examples of the hydrocarbon include α-olefin oligomer, light isoparaffin, light liquid isoparaffin, liquid isoparaffin, liquid paraffin, squalane, polybutene, paraffin, polyethylene powder, microcrystalline wax, and petroleum jelly. Examples of higher fatty acids include lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, isostearic acid, hydroxystearic acid, 12-hydroxystearic acid, oleic acid, undecylenic acid, linoleic acid, ricinoleic acid, and lanolin fatty acid. Can be mentioned. Examples of the alkyl glyceryl ether include batyl alcohol, chimyl alcohol, ceralkyl alcohol, and isostearyl glyceryl ether.

  Examples of esters include diisopropyl adipate, diisobutyl adipate, dioctyl adipate, 2-hexyldecyl adipate, diisostearyl adipate, isopropyl myristate, cetyl octanoate, cetyl isooctanoate, isononyl isononanoate, and isodecyl isononanoate , Isotridecyl isononanoate, diisopropyl sebacate, octyldodecyl myristate, isopropyl palmitate, butyl stearate, stearyl stearate, hexyl laurate, myristyl myristate, decyl oleate, hexyl decyl dimethyloctanoate, triisodecyl myristate, myristic acid Isostearyl, 2-ethylhexyl palmitate, octyldodecyl ricinoleate, fat having 10 to 30 carbon atoms Cholesteryl acid / lanosteryl, lauryl lactate, cetyl lactate, myristyl lactate, octyldodecyl lactate, lanolin acetate, isocetyl stearate, isocetyl isostearate, cholesteryl 12-hydroxystearate, ethylene glycol di-2-ethylhexanoate, dipentaerythritol fatty acid Examples include esters, N-alkyl glycol monoisostearate, cetyl caprate, glyceryl tricaprylate, neopentyl glycol dicaprate, diisostearyl malate, and lanolin derivatives.

  Examples of silicone include dimethylpolysiloxane (dimethicone), methylphenylpolysiloxane, terminal hydroxyl group-modified dimethylpolysiloxane, fatty acid-modified polysiloxane, amino-modified silicone, alcohol-modified silicone, glycerin-modified silicone, aliphatic alcohol-modified polysiloxane, and epoxy-modified. Examples include silicone, fluorine-modified silicone, cyclic silicone, alkyl-modified silicone, and polyether-modified silicone. Specific examples of these oil components may be used alone or in combination of two or more.

  Surfactant may be mix | blended in order to maintain the stability of an acidic hair dye composition as an emulsifier or a solubilizer of each component. Examples of the surfactant include an anionic surfactant, a cationic surfactant, an amphoteric surfactant, and a nonionic surfactant.

  Examples of the anionic surfactant include alkyl sulfate ester salts, alkyl ether sulfate ester salts, sulfonate type anionic surfactants, phosphate ester type anionic surfactants, and N-acyl amino acid type interfaces. An activator is mentioned. Examples of the alkyl sulfate ester salt include sodium lauryl sulfate and triethanolamine lauryl sulfate. Examples of the alkyl ether sulfate ester salt include polyoxyethylene (hereinafter referred to as “POE”) sodium lauryl ether sulfate. Examples of the sulfonate type anionic surfactant include sodium stearoylmethyl taurate, triethanolamine dodecylbenzenesulfonate, and sodium tetradecenesulfonate. Examples of the phosphoric ester salt type anionic surfactant include POE lauryl ether phosphoric acid and salts thereof. Examples of the N-acyl amino acid type surfactant include N-lauroyl glutamates and N-lauroylmethyl-β-alanine salts.

  Examples of the cationic surfactant include lauryl trimethyl ammonium chloride, cetyl trimethyl ammonium chloride, stearyl trimethyl ammonium chloride, alkyl trimethyl ammonium chloride, distearyl dimethyl ammonium chloride, cetyl trimethyl ammonium bromide, stearyl trimethyl ammonium bromide, ethyl lanolin sulfate. Examples include fatty acid aminopropylethyldimethylammonium, stearyltrimethylammonium saccharin, cetyltrimethylammonium saccharin, and behenyltrimethylammonium methylsulfate.

  Examples of amphoteric surfactants include 2-undecyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine sodium, cocoamidopropyl betaine, and lauryldimethylaminoacetic acid betaine.

  Specific examples of the nonionic surfactant include ether type nonionic surfactants and ester type nonionic surfactants. Specific examples of the ether type nonionic surfactant include, for example, POE cetyl ether, POE stearyl ether, POE behenyl ether, POE oleyl ether, POE lauryl ether, POE octyl decyl ether, POE hexyl decyl ether, POE isostearyl ether, POE nonyl phenyl ether and POE octyl phenyl ether are mentioned.

  Specific examples of the ester type nonionic surfactant include, for example, POE sorbitan monooleate, POE sorbitan monostearate, POE sorbitan monopalmitate, POE sorbitan monolaurate, POE sorbitan trioleate, POE glycerol monostearate, Monomyristic acid POE glycerin, Tetraoleic acid POE sorbit, Hexostearic acid POE sorbit, Monolauric acid POE sorbit, POE sorbit beeswax, Monooleic acid polyethylene glycol, Monostearic acid polyethylene glycol, Monolauric acid polyethylene glycol, Lipophilic monooleic acid Glycerol, lipophilic glyceryl monostearate, self-emulsifying glyceryl monostearate, sorbitan monooleate, sesqui Sorbitan oleate, sorbitan trioleate, sorbitan monostearate, sorbitan monopalmitate, sorbitan monolaurate, sucrose fatty acid ester, decaglyceryl monolaurate, decaglyceryl monostearate, decaglyceryl monooleate, and decaglyceryl monomyristate Examples include glyceryl. Specific examples of these surfactants may be used alone or in combination of two or more.

  Examples of the sugar include sorbitol and maltose. Examples of the preservative include parabens. Examples of the stabilizer include phenacetin, 8-hydroxyquinoline, acetanilide, sodium pyrophosphate, barbituric acid, uric acid, and tannic acid. Chelating agents include ethylenediamine hydroxyethyl triacetate, edetic acid, disodium edetate, tetrasodium edetate, sodium citrate, sodium metaphosphate, sodium polyphosphate, and hydroxyethylidene diphosphonic acid and its salts . Examples of the pH adjuster include 2-amino-2-methyl-1-propanol (AMP), triethanolamine (TEA), and arginine. Examples of the antioxidant include sulfite. Moreover, you may mix | blend at least 1 type chosen from what is listed in "the quasi-drug raw material specification" (June 2006 issue, Yakuji Nippo).

  The dosage form of the acidic hair dye composition is not particularly limited, and examples thereof include liquid, gel, foam, and cream. Examples of the liquid include aqueous solutions, dispersions, and emulsions. The method for applying the acidic hair dye composition to the hair is not particularly limited, and a known method can be appropriately used. For example, a coating method using a comb or a brush, a coating method using a hand comb, and a coating method using a spray (spraying) can be used.

Next, the effect | action of the acidic hair dye composition of this embodiment is demonstrated.
The acidic hair dye composition of this embodiment is allowed to stand for a predetermined time after being applied to the hair. The hair is dyed in a desired color tone by the adsorption of the acid dye on the surface and the penetration of the acid dye into the hair. After the hair dyeing treatment, the pH inside the hair is maintained in a weakly acidic region that is the pH inside the original hair, that is, in the range of 5.5-6. Thereby, the fall of the touch accompanying pH fluctuation | variation can be suppressed. Moreover, the discoloration of the color tone of the oxidative hair dye accompanying the pH fluctuation at the time of treatment can be suppressed. In other words, after the hair dyeing treatment with the acidic hair dye composition, when the hair dyeing treatment is subsequently performed with the oxidation hair dye containing the oxidation dye, the hair color tone of the oxidation hair dye does not cause discoloration. Without decontaminating the dye, the hair can be dyed according to the expected color tone when the oxidation dye is further applied. In addition, after hair treatment with an oxidative hair dye containing an oxidative dye, and subsequently hair treatment with an acidic hair dye composition, it may cause a discoloration in the hair color of the oxidative hair dye previously dyed. Therefore, it can be dyed according to the color tone expected when the acidic hair dye composition is further overcoated.

  As described above, the acidic hair dye composition of the present embodiment is obtained by performing a hair dyeing process with an acidic hair dye composition, and subsequently performing a hair dyeing process with an oxidation hair dye containing an oxidation dye, or an oxidation dye. It can apply preferably to the hair dyeing method which dyes hair with the acidic hair dye composition after hair dyeing with the contained oxidation hair dye. As such a hair dyeing method, the hair dyeing treatment may be carried out with the acidic hair dye composition of the present embodiment immediately after completing the hair dyeing treatment with the oxidation hair dye. Further, after dyeing with an oxidative hair dye, hair may be dyed with an acidic hair dye composition after a lapse of several months to several weeks and one month. Similarly, hair may be dyed with an oxidation hair dye immediately after completing the hair dyeing treatment with the acidic hair dye composition of the present embodiment. In addition, after hair dyeing with an acidic hair dye composition, hair may be dyed with an oxidative hair dye after one month has passed for several days to several weeks.

  As the oxidative hair dye used in such a hair dyeing method, known ones can be appropriately employed. For example, the oxidative hair dye may be a two-component oxidative hair dye composed of a first agent containing an alkali agent and an oxidative dye and a second agent containing an oxidant.

  The alkaline agent improves the dyeability of hair by promoting the action of the oxidizing agent contained in the second agent. Examples of the alkali agent include ammonia, alkanolamine, ammonium halide, and inorganic ammonium salts such as silicate, carbonate, hydrogencarbonate, metasilicate, sulfate, and phosphate. Examples of the alkanolamine include monoethanolamine and triethanolamine. Examples of the ammonium halide include ammonium chloride. Examples of the silicate include sodium silicate and potassium silicate. Examples of the carbonate include sodium carbonate and ammonium carbonate. Examples of the bicarbonate include sodium bicarbonate and ammonium bicarbonate. Examples of the metasilicate include sodium metasilicate and potassium metasilicate. Examples of the sulfate include ammonium sulfate. Examples of the phosphate include primary ammonium phosphate and secondary ammonium phosphate. Among these, ammonia and ammonium salts are preferable from the viewpoint of improving hair dyeing power.

  The content of the alkaline agent is appropriately set. Preferably, in the oxidative hair dye in which the first agent and the second agent are mixed, the pH of a 10% by mass aqueous solution of the oxidative hair dye is preferably 7 to 9. The amount is in the range of 5. If pH is less than 7, there exists a possibility that the effect | action of the oxidizing agent of a 2nd agent may not fully be accelerated | stimulated. When the pH of the mixed solution exceeds 9.5, the color tone is applied to the hair dyed with the acidic hair dye composition or when the acid hair dye composition is applied again after the hair dyeing treatment with the oxidation hair dye. Discoloration may occur.

  Oxidative dyes are compounds that can develop color due to oxidative polymerization by an oxidant contained in the second agent, and are classified as dye intermediates and couplers. The oxidation dye contains at least a dye intermediate.

  Examples of the dye intermediate include p-phenylenediamine, toluene-2,5-diamine (paratolylenediamine), N-phenyl-p-phenylenediamine, 4,4′-diaminodiphenylamine, p-aminophenol, o- Aminophenol, p-methylaminophenol, N, N-bis (2-hydroxyethyl) -p-phenylenediamine, 2-hydroxyethyl-p-phenylenediamine, o-chloro-p-phenylenediamine, 4-amino-m -Cresol, 2-amino-4-hydroxyethylaminoanisole, 2,4-diaminophenol, and salts thereof. Among these specific examples, only 1 type may be contained independently and 2 or more types may be combined and contained.

  Couplers develop color by binding to dye intermediates. Examples of the coupler include resorcin, 5-amino-o-cresol, m-aminophenol, α-naphthol, 5- (2-hydroxyethylamino) -2-methylphenol, m-phenylenediamine, and 2,4-diaminophenoxyethanol. , Toluene-3,4-diamine, 2,6-diaminopyridine, diphenylamine, N, N-diethyl-m-aminophenol, phenylmethylpyrazolone, and salts thereof. Among these specific examples, only 1 type may be contained independently and 2 or more types may be combined and contained. Since the oxidative dye can change the color tone of the hair in various ways, it is preferable that at least one selected from the specific examples of the dye intermediate and at least one selected from the specific examples of the coupler. Composed. The first agent is suitably selected from dyes other than the above-mentioned oxidation dyes, for example, at least one selected from oxidation dyes and direct dyes listed in "Quasi-drug raw material standards" (issued in June 2006, Yakuji Nippo). You may contain. Moreover, as components other than the component mentioned above contained in 1st agent, components other than the dye contained in an acidic hair dye composition, for example, water, a water-soluble polymer compound, an oil-based component, surfactant, sugar , Preservatives, stabilizers, chelating agents, pH adjusters, plant extracts, herbal extracts, vitamins, fragrances, UV absorbers, and antioxidants.

  The second agent contains an oxidizing agent. The oxidizing agent decolorizes melanin contained in the hair. Examples of the oxidizing agent include hydrogen peroxide, urea peroxide, melamine peroxide, sodium percarbonate, potassium percarbonate, sodium perborate, potassium perborate, ammonium persulfate, sodium peroxide, potassium peroxide, magnesium peroxide. , Barium peroxide, calcium peroxide, strontium peroxide, sulfate hydrogen peroxide adduct, phosphate hydrogen peroxide adduct, and pyrophosphate hydrogen peroxide adduct. The content of the oxidizing agent in the second agent is preferably 0.1 to 15.0% by mass, more preferably 2.0 to 9.0% by mass, and most preferably 3.0 to 6% by mass. %. If the content of the oxidizing agent is less than 0.1% by mass, melanin may not be sufficiently decolorized. If the content of the oxidizing agent exceeds 15.0% by mass, the hair may be damaged.

  When hydrogen peroxide is added to the second agent as an oxidizing agent, the second agent is preferably a stabilizer such as ethylene glycol phenyl ether (phenoxyethanol), hydroxyethane, in order to improve the stability of hydrogen peroxide. Contains diphosphonic acid and its salts. Examples of the hydroxyethane diphosphonate include tetrasodium hydroxyethane diphosphonate and disodium hydroxyethane diphosphonate. The 2nd agent may contain each component which is generally contained in an oxidation hair dye and does not inhibit the operation of each component mentioned above. For example, components other than the alkaline agent contained in the first agent described above may be appropriately contained within a range that does not impair the effects of the present invention.

  After the first agent and the second agent are mixed, the oxidative hair dye is then applied to the hair with the required amount of the mixture attached to a hand with a thin glove, a comb (comb) or a brush. After being allowed to stand for a period of time, the hair is dyed by washing and drying.

According to the acidic hair dye composition of the present embodiment, the following effects can be obtained.
(1) In the acidic hair dye composition of the present embodiment, (A) an ionic water-soluble polymer compound of 1.5 to 4.5% by mass, (B) an organic acid and its salt, and an inorganic acid and its salt While containing 0.005-1.5% by mass of a buffer configured as at least one selected, and (C) an acidic dye, the pH of a 10% by mass aqueous solution of the acidic hair dye composition is adjusted to 4-6. The Therefore, after the hair dyeing treatment, the pH inside the hair is maintained in a weakly acidic region that is the isoelectric point inside the original hair, that is, in the range of 5.5-6. Therefore, in the acidic hair dye composition containing an acidic dye, it is possible to suppress a decrease in touch accompanying a change in pH and a color change of the oxidative hair dye.

(2) Moreover, the viscosity stability and pH stability at the time of long-term storage of an acidic hair dye composition can be improved.
(3) Preferably, (B) at least one selected from acetic acid, tartaric acid, citric acid, lactic acid, glycolic acid, and pyrrolidone carboxylic acid is used as the organic acid constituting the buffer. Therefore, the pH stability of the acidic hair dye composition during long-term storage can be further improved. Moreover, the fall of the touch accompanying pH change and the discoloration of the color tone of an oxidative hair dye can be suppressed more.

  (4) Preferably, the mass ratio of the content of (A) ionic water-soluble polymer compound to the content of (B) buffer in the acidic hair dye composition is 1 to 750. Therefore, the viscosity stability of the acidic hair dye composition during long-term storage can be further improved. Moreover, the fall of the feeling accompanying pH change can be suppressed more.

  (5) The acidic hair dye composition of the present embodiment is preferably applied to a hair dyeing method in which hair treatment is performed with an acidic hair dye composition, and then an oxidation hair dye containing an oxidation dye is used. . Accordingly, since the hair color tone of the oxidative hair dye does not cause discoloration, the hair color can be dyed in accordance with the color tone expected when the oxidative dye is further applied without decontaminating the acidic dye.

  (6) The acidic hair dye composition of this embodiment is preferably applied to a hair dyeing method in which hair is treated with an oxidative hair dye containing an oxidative dye and then treated with an acidic hair dye composition. . Therefore, since it does not cause discoloration in the hair color tone of the oxidative hair dye previously dyed, hair can be dyed according to the color tone expected when the acidic hair dye composition is further overcoated.

  (7) In the hair dyeing method in which the acidic hair dye composition and the oxidative hair dye of this embodiment are used alternately and repeatedly, the pH of the 10% by mass aqueous solution of the oxidative hair dye is preferably 7 to 9.5. It is. Accordingly, the action of the oxidizing agent of the second agent can be sufficiently promoted, and when the hair is dyed over hair dyed with the acidic hair dye composition, or after the hair dyeing treatment with the oxidizing hair dye, the acidic hair dye composition Discoloration of the color tone can be suppressed when an object is overcoated.

In addition, you may change the said embodiment as follows.
-In the said embodiment, it comprised as 1 agent type | formula which mix | blends each component which comprises an acidic hair dye composition. However, each component may be separated into a multi-drug form and mixed immediately before use.

  -In the said embodiment, the oxidative hair dye was comprised as a 2 agent type | formula which consists of the 1st agent containing an alkaline agent and an oxidative dye, and the 2nd agent containing an oxidizing agent. However, it may be configured as a one-component system in which all of the components are blended, or each component may be separated into a plurality of three-component or more and mixed immediately before use. Good.

  -In the said embodiment, the product form of an acidic hair dye composition may be a color treatment other than hair manicure, for example. Hair nail polish is a hair dye that is dyed to a desired color tone by a single hair dyeing operation. On the other hand, the color treatment is a gradual dyeing hair dye that is gradually dyed to a desired color tone as a result of repeated hair dyeing treatment by applying it to hair by daily hair care or the like.

Next, the embodiment will be described more specifically with reference to examples and comparative examples.
The components shown in Tables 1 and 2 were mixed to prepare acidic hair dye compositions of Examples and Comparative Examples. The obtained acidic hair dye composition is applied to a human hair bundle mixed with gray hair using a brush, left at 40 ° C. for 20 minutes, washed with a normal shampoo, and then dried to obtain a hair dye-treated hair bundle. It was. About this hair dyeing process hair bundle, the hair inside hair after a hair dyeing process and the touch of hair were evaluated. Moreover, the discoloration inhibitory effect of the color tone at the time of repeating hair dyeing using the acidic hair dye composition of each example and the oxidation hair dye containing oxidation dye was evaluated. Moreover, about the acidic hair dye composition of each Example and a comparative example, it evaluated about pH stability and viscosity stability. The evaluation results are shown in Tables 1 and 2. In addition, the unit of the numerical value which shows the mixing | blending of each component in Table 1, 2 is the mass%. Moreover, the notation of (A)-(C) in the "component" column in a table | surface shows the compound corresponding to each component of this-application claim, respectively. On the other hand, the notation “a” in the “component” column in the table indicates the comparative compound of component (A) described in the claims of this application.

  In the table, “total mass of (A) / total mass of (B)” is the mass of the content of (A) ionic water-soluble polymer compound relative to the content of (B) buffer in the acidic hair dye composition. The ratio (A / B) is shown. Moreover, pH of acidic hair dye composition shows pH of 10 mass% aqueous solution which diluted each acidic hair dye composition prepared in order to reduce a viscosity 10 times. Moreover, the pH of the oxidative hair dye in Table 3 to be described later is the pH of a 10% by mass aqueous solution obtained by diluting a mixture of the first agent and the second agent prepared 10 times with water in order to lower the viscosity. Show.

  As the ionic water-soluble polymer compound A in the table, Aristoflex HMB ((acryloyldimethyltaurine ammonium / beheneth-25 methacrylate) copolymer: manufactured by Clariant Japan) was used. As the ionic water-soluble polymer compound B, SIMULGEL EG ((Na acrylate / acryloyl dimethyl taurine Na) copolymer, isohexadecane, polysorbate 80, and water mixed raw material: manufactured by Seiwa Supply Co., Ltd.) was used. The numerical value indicating the blending amount in the table indicates the pure content of the ionic water-soluble polymer compound.

<PH inside hair after hair dyeing treatment>
Cut the hair that has been dyed to about 5 mm, weigh about 1 g, and crush it into a crushing cell of a freeze crusher (FREEZER / MILL, Spex Industries Inc. NJUSA) and metal crush Put together with the bar and cool with liquid nitrogen for 20 minutes. After confirming that the hair was completely frozen, it was pulverized for 20 minutes to obtain a hair powder. 0.5 g of hair powder was measured and 2 g of purified water was added to obtain a paste-like aqueous solution. About 1 g of the pasty aqueous solution was weighed and the pH was measured using a compact pH meter <Twin pH> AS212 type (Horiba Seisakusho).

<Feel>
The human hair bundle after the hair dyeing treatment was touched by 10 panelists to determine whether or not the touch was good. People who answered “good” out of 10 panelists rated 5 or more, people who answered “good” out of 10 panelists rated 6-7, and those who answered “good” out of 10 panelists 4 to 5 were rated 3, 3 to 10 panelists answered “good”, 2 to 3 were rated 2, and 1 person out of 10 panelists rated “good” were rated 1 or less.

<PH stability>
The acidic hair dye composition in each example was placed in a constant temperature bath at 60 ° C. and stored for 1 week. The pH of the acidic hair dye composition after storage for 1 week was measured. A ratio (= pH immediately after preparation / pH after storage for 1 week) was calculated from the pH of the acid hair composition immediately after preparation and the pH of the acid hair composition after storage for 1 week. This ratio is 0.99 or more and less than 1.01 (very good: 5), the pH ratio is 0.97 or more and less than 0.99 or 1.01 or more and less than 1.03 (excellent: 4), and the pH ratio is 0.00. 95 or more and less than 0.97 or 1.03 or more and less than 1.05 (good: 3), pH ratio is 0.93 or more and less than 0.95 or 1.05 or more and less than 1.07 (somewhat bad: 2) and pH ratio Of less than 0.93 or 1.07 or more (bad: 1).

<Viscosity stability>
The acidic hair dye composition in each example was placed in a constant temperature bath at 60 ° C. and stored for 1 week. The viscosity of the acidic hair dye composition after storage for 1 week is measured using a B-type viscometer, BL adapter (rotation speed 60 rpm, 25 ° C., 1 minute), or TV-10M viscometer / digital type, rotor No. 3, rotor no. 4 (revolutions 3 rpm, 6 rpm, 12 rpm, 25 ° C., 1 minute condition). The viscosity ratio (= viscosity immediately after preparation / viscosity after storage for 1 week) was calculated from the viscosity measured for the acidic hair dye composition immediately after preparation under the same conditions and the viscosity of the acidic hair dye composition after storage for 1 week. This viscosity ratio is 0.80 or more and less than 1.20 (very good: 5), the viscosity ratio is 0.60 or more and less than 0.80 or 1.2 or more and less than 2.0 (excellent: 4), and the viscosity ratio is 0 .40 or more and less than 0.60 or 2.0 or more and less than 4.0 (good: 3), viscosity ratio is 0.20 or more and less than 0.40, or 4.0 or more and less than 6.0 (slightly bad: 2) and viscosity The ratio was evaluated in 5 grades of less than 0.20 or 6.0 or more (bad: 1).

<Effect of inhibiting discoloration of color tone in the case of hair dyeing treatment using an oxidative hair dye after hair dyeing treatment using an acidic hair dye composition>
Inhibition of discoloration of the color tone when the hair dyed hair bundle of each example treated with the acidic hair dye composition as described above is further dyed with an oxidative hair dye containing an oxidative dye. The effect was evaluated. As an oxidative hair dye, the composition containing each component shown by the prescription 4 of Table 3 was used. In addition, the numerical value in the column which shows each component in Table 3 shows content of the component of the said column, The unit is the mass%. And the 1st agent and the 2nd agent were mixed by mass ratio of 1: 1, and the oxidative hair dye was prepared. The obtained oxidative hair dye of each example was applied to the hair-dyed hair bundle of each example using a brush and allowed to stand at 30 ° C. for 30 minutes. The oxidative hair dye attached to the hair bundle was washed away with water, and then the shampoo was applied to the hair bundle twice and rinsed once. Subsequently, the hair bundle was dried with warm air and then left for one day. The change in color tone was evaluated for the hair bundle that was subjected to the hair dyeing treatment with the acidic hair dye composition and the oxidative hair dye.

  As for the color tone of the hair bundle that has been subjected to the hair dyeing treatment as described above, an expert panelist visually observes it under a standard light source and evaluates it based on the number of panelists judged to have a good color tone discoloration suppressing effect. did. Those who answered “good” out of 10 panelists rated 5 or more 5 people who answered “good” out of 10 panelists rated 4 and 4 who answered “good” out of 10 panelists 4 to 5 were rated 3, 2 to 3 were answered as “good” among 10 panelists, and 1 or less were rated as 1 among 10 panelists.

<Effect of inhibiting discoloration of color tone when hair is treated using an oxidation hair dye and an acidic hair dye composition>
Color tone when hair dyeing is performed using the acidic hair dye composition of Example 17 or Comparative Example 9 and the oxidative hair dye of each formulation shown in Table 3 in the order shown in Test Examples 1 to 12 of Table 4. The discoloration suppressing effect of was evaluated. When the hair dyeing treatment is performed using the acidic hair dye composition first, followed by the hair dyeing treatment using the oxidation hair dye (Test Examples 4 to 6 and 10 to 12), and the oxidation hair dye is used first. Then, the hair was treated by two hair dyeing methods (Test Examples 1 to 3 and 7 to 9). The hair dyeing method of the acidic hair dye composition and the oxidative hair dye followed the above method.

  As for the color tone of the hair bundle that has been subjected to the hair dyeing treatment with the oxidative hair dye and the acidic hair dye composition as described above, a specialized panelist visually observes it under a standard light source, and the color change suppression effect is good. Evaluation was based on the number of panelists judged to be. Those who answered “good” out of 10 panelists rated 5 or more 5 people who answered “good” out of 10 panelists rated 4 and 4 who answered “good” out of 10 panelists 4 to 5 were rated 3, 2 to 3 were answered as “good” among 10 panelists, and 1 or less were rated as 1 among 10 panelists.

表１に示されるように（Ａ）イオン性水溶性高分子化合物１．５〜４．５質量％、（Ｂ）緩衝剤０．００５〜１．５質量％、及び（Ｃ）酸性染料を含有するとともに、ｐＨ４〜６の範囲に調整された各実施例は、各評価が良好な結果であることが確認される。また、（Ｂ）緩衝剤としてクエン酸、乳酸、グリコール酸、又はピロリドンカルボン酸を使用する実施例９〜１４は、酢酸又は酒石酸を使用する実施例１〜８に対し、ｐＨ安定性の評価がより優れることが確認される。（Ｂ）緩衝剤の含有量に対する（Ａ）イオン性水溶性高分子化合物の含有量の質量比（Ａ／Ｂ）が、２〜３５０である実施例１５〜１８は、実施例１〜１４に対し、感触及び粘度安定性の評価がより優れることが確認される。

As shown in Table 1, (A) ionic water-soluble polymer compound 1.5 to 4.5% by mass, (B) buffering agent 0.005 to 1.5% by mass, and (C) acidic dye In addition, each example adjusted to a pH of 4 to 6 confirms that each evaluation is a good result. In addition, (B) Examples 9 to 14 using citric acid, lactic acid, glycolic acid, or pyrrolidone carboxylic acid as a buffering agent were evaluated for pH stability relative to Examples 1 to 8 using acetic acid or tartaric acid. It is confirmed that it is superior. (B) Examples 15 to 18 in which the mass ratio (A / B) of the content of the (A) ionic water-soluble polymer compound to the content of the buffer is 2 to 350 are the same as those of Examples 1 to 14. On the other hand, it is confirmed that the evaluation of feel and viscosity stability is more excellent.

  Further, as shown in Table 2, it is confirmed that Comparative Example 1 which does not contain (A) an ionic water-soluble polymer compound has a lower evaluation of feel and pH stability than each Example. (A) In Comparative Example 2 in which the content of the ionic water-soluble polymer compound is less than 1.5% by mass, it is confirmed that the evaluation of feel and viscosity stability is lower than in each Example. (A) In Comparative Example 3 in which the content of the ionic water-soluble polymer compound exceeds 4.5% by mass, it is confirmed that the evaluation of touch is lower than in each Example. (B) It is confirmed that the comparative example 4 whose buffering agent content is less than 0.005 mass% has low evaluation of pH stability and viscosity stability compared with each Example. (B) In Comparative Example 5 in which the content of the buffering agent exceeds 1.5% by mass, it is confirmed that the feel and viscosity stability are evaluated lower than in each Example. (B) It is confirmed that the comparative example 6 which does not contain a buffer has low evaluation of pH stability and viscosity stability compared with each Example. In Comparative Examples 7 and 9 in which the pH of the acidic hair dye composition is less than 4, the pH in the hair after the hair dyeing treatment is lower than 5.5. Therefore, in the hair dyeing treatment using the oxidation hair dye, It is confirmed that the discoloration suppressing effect is lower than in each example. In Comparative Example 8 in which the pH of the acidic hair dye composition exceeds 6, the pH in the hair after the hair dyeing treatment exceeds 6, and thus it is confirmed that the feel of the hair is lower than in each Example. (A) Comparative Example 10 containing a nonionic water-soluble polymer compound instead of an ionic water-soluble polymer compound is confirmed to have a particularly low evaluation of viscosity stability as compared to each example. .

  As shown in Table 4, the hair bundle that was dyed with the acidic hair dye composition of Example 17 on the hair bundle immediately after the hair dyeing treatment with the oxidation hair dye of Formula 1 has little color tone change. The hair bundle that has been dyed with the acidic hair dye composition of Example 17 on the hair bundle immediately after the hair dyeing treatment with each of the oxidative hair dyes of Formula 2 and Formula 3 has a good effect of suppressing color change. confirmed. It was confirmed that each hair bundle that had been hair-dyed with each of the oxidation hair dyes of Formulations 1 to 3 on the hair bundle immediately after dyeing with the acidic hair dye composition of Example 17 had a good effect of suppressing color change. It was done.

  The hair bundle obtained by dyeing the hair bundle immediately after dyeing with the oxidation hair dye of Formula 1 with the acidic hair dye composition of Comparative Example 9 has a large color change because the pH of the acidic hair dye composition is low. The hair bundle that has been dyed with the acidic hair dye composition of Comparative Example 9 on the hair bundle immediately after dyeing with each of the oxidative hair dyes of Formula 2 and Formula 3 has a color tone because the pH of the acidic hair dye composition is low. The change is a little big. The hair bundle obtained by dyeing the hair bundle immediately after dyeing with the acidic hair dye composition of Comparative Example 9 with the oxidation hair dye of Formula 1 has a slightly large change in color tone because the pH of the acidic hair dye composition is low. Each hair bundle obtained by dyeing the hair bundle immediately after dyeing with the acidic hair dye composition of Comparative Example 9 with each of the oxidation hair dyes of Formulations 2 and 3 has a change in color tone because the pH of the acidic hair dye composition is low. Is big.

Next, the technical idea that can be grasped from the above embodiment and other examples will be described below.
(A) A hair dyeing method comprising treating the acid hair dye composition and the oxidative hair dye alternately and repeatedly a plurality of times.

Claims (7)

It contains the following components (A) to (C), the pH of the 10% by mass aqueous solution of the acidic hair dye composition is 4 to 6, and the pH of the hair after dyeing is 5.5 to 6 An acidic hair dye composition characterized by that.
(A) 1.5 to 4.5% by mass of an ionic water-soluble polymer compound.
(B) Buffering agent 0.005-1.5 mass% comprised as at least 1 type chosen from an organic acid and its salt, and an inorganic acid and its salt.
(C) Acid dye.   The acidic hair dye composition according to claim 1, wherein the organic acid is at least one selected from acetic acid, tartaric acid, citric acid, lactic acid, glycolic acid, and pyrrolidone carboxylic acid.   The mass ratio of the content of the (A) ionic water-soluble polymer compound to the content of the (B) buffer in the acidic hair dye composition is 1 to 750. Or the acidic hair dye composition of Claim 2. In the hair dyeing method using the acidic hair dye composition according to any one of claims 1 to 3,
A hair dyeing method, wherein after the hair dyeing treatment with the acidic hair dye composition, the hair dyeing treatment is carried out with an oxidation hair dye containing an oxidation dye.   The hair dyeing method according to claim 4, wherein the oxidative hair dye has a pH of 7 to 9.5 in a 10 mass% aqueous solution of the oxidative hair dye. In the hair dyeing method using the acidic hair dye composition according to any one of claims 1 to 3,
A hair dyeing method comprising performing a hair dyeing treatment with an acidic hair dye composition after hair dyeing with an oxidation hair dye containing an oxidation dye.   The hair dyeing method according to claim 6, wherein the oxidative hair dye has a pH of 7 to 9.5 in a 10% by mass aqueous solution of the oxidative hair dye.