JP5220324B2 - Acid hair dye composition - Google Patents

Description

  The present invention relates to an acidic hair dye composition.

Conventionally, hair dye compositions containing an ester compound are known. Diethoxyethyl succinate, which is a kind of ester compound, is known as a component that can be blended with acidic hair dyes (see Patent Documents 1 and 2). In addition, in hair dye compositions containing basic dyes and the like, the formulation of diethoxyethyl succinate is known (see Patent Documents 3 and 4).
JP 2002-47150 A Japanese Patent Laid-Open No. 2003-160452 JP 2004-59565 A JP 2004-315410 A

  In an acidic hair dye composition, it is important as basic performance to improve hair dyeing power and to suppress fading after hair dyeing. However, in the case of a specific acidic dye composition, when such basic performance is enhanced, there is a problem that the variation in color tone is remarkably different in the hair after hair dyeing. Such variations in color tone are likely to appear as a difference between the color tone of the hair tip part and the color tone of the vicinity of the root in the hair after dyeing. To describe this phenomenon in detail, the tip portion of the hair is often exposed to an external environment for a long time, and frequently undergoes chemical treatment such as permanent wave, while the portion near the root of the hair. The period of exposure to the external environment is short and the frequency of chemical treatment is low. For this reason, the chemical properties of the hair protein in the hair tip part and the root vicinity part are different from each other. Here, since the chemical properties of the acid dyes are also different depending on the type of the acid dye, there is a difference in the affinity and penetrability of the acid dyes to the hair. In addition, the difference in affinity and permeability of these acidic dyes to hair is also caused by the difference in chemical properties of hair proteins. And in specific acid dyes, the affinity and penetrability to hair is presumed to be easily influenced by the difference in chemical properties of hair proteins. The difference from the color tone of the part becomes remarkable. That is, with hair dyeing with a specific acid dye, it has been extremely difficult to achieve dyeing with less unevenness in addition to fully exhibiting basic performance such as improvement of hair dyeing ability and fading after hair dyeing. .

  This invention is made | formed by finding the effect of the specific alkylene glycol ester with respect to a specific acidic dye in an acidic hair dye composition. An object of the present invention is to provide an acidic hair dye composition that can easily increase the hair dyeing power, suppress fading after hair dyeing, and easily improve the uniformity of the color tone after dyeing.

  In order to achieve the above object, in the acidic hair dye composition of the invention according to claim 1, the acidic hair dye composition contains at least one pH adjuster selected from organic acids and organic acid salts, and a thickener. (A) As an acidic dye, it contains at least one selected from black 401, purple 401, and Daidai 205, and (B) alkylene glycol ester represented by the following general formula (1) It is made to contain.

In the general formula (1), B is Ru alkylene der having a carbon number of 4-22. R ¹ is an alkyloxy group represented by the following general formula (2).

In the general formula (2), R ² represents hydrogen or a hydrocarbon group having 1 to 22 carbon atoms, and the hydrocarbon group as R ² is a linear or branched hydrocarbon group, It may be saturated or unsaturated. x and y are the same or different integers of 1 or more, and one of x and y may be 0.

  The invention according to claim 2 is characterized in that, in the invention according to claim 1, the (A) acidic dye and the (B) alkylene glycol ester are contained in a mass ratio of 1: 100 to 1: 2. And

  The gist of the invention described in claim 3 is that, in the invention described in claim 1 or 2, it further contains an aromatic alcohol as a hair penetrant.

  According to the present invention, it is easy to increase the hair dyeing power and suppress fading after dyeing, and it is easy to improve the uniformity of the color tone after dyeing.

Hereinafter, embodiments of the present invention will be described in detail.
The acidic hair dye composition of this embodiment contains a pH adjuster, a thickener, (A) an acidic dye, and (B) an alkylene glycol ester. This acidic hair dye composition dyes hair with (A) an acidic dye.

  The pH adjuster is blended in order to enhance hair dyeing power and dyeing fastness. The pH adjuster is at least one selected from organic acids and organic acid salts. Examples of the organic acid include citric acid, glycolic acid, succinic acid, tartaric acid, lactic acid, malic acid, levulinic acid, acetic acid, butyric acid, and valeric acid. Oxalic acid, maleic acid, fumaric acid, mandelic acid and the like. Examples of the organic acid salt include sodium salt, potassium salt, ammonium salt and the like. In addition, pH of the acidic hair dye composition in this embodiment is suitably set according to the kind etc. of (A) acidic dye, Preferably it is adjusted to 1-5, More preferably, it is 2-4.5. If the pH is less than 1, the scalp may be too irritating. On the other hand, when pH exceeds 5, (A) The hair dyeing power by an acidic dye tends to be reduced.

  A thickener is mix | blended in order to improve hair dyeing power and dyeing fastness. Examples of thickeners include gum arabic, carrageenan, galactan, guar gum, quince seed gum, locust bean gum, tragacanth gum, pectin, mannan, starch, xanthan gum, hydroxyalkyl xanthan gum, dextran, hyaluronic acid, curdlan, succinoglucan, Natural polymers such as gelatin, collagen, casein, albumin, cellulose polymers such as methyl cellulose, ethyl cellulose, hydroxyethyl cellulose, sodium carboxymethyl cellulose, hydroxypropyl methyl cellulose, starch polymers such as carboxymethyl starch, methyl starch, soluble starch, Semi-synthetic polymers such as alginates and alginate polymers such as propylene glycol alginate, carboxy Vinyl polymer, polyvinyl alcohol, polyvinyl pyrrolidone, polyvinyl methyl ether, sodium polyacrylate, polyethylene oxide, ethylene oxide / propylene oxide block copolymer, polyacrylamide, acrylamide / acrylamide-2-methylpropanesulfonic acid copolymer, hydroxy acrylate Examples thereof include synthetic polymers such as ethyl / acryloyldimethyltaurine salt copolymer and sodium acrylate / acryloyldimethyltaurine salt copolymer, and inorganic polymers such as bentonite and laponite. A thickener may be mix | blended independently and may be mix | blended combining multiple types. Among these thickeners, at least one kind of polymer composed of a cellulosic polymer and a synthetic polymer is suitable because of excellent storage stability.

  Content of the thickener in an acidic hair dye composition becomes like this. Preferably it is 0.1-10.0 mass%, More preferably, it is 0.5-8.0 mass%. When content of a thickener is less than 0.1 mass%, there exists a possibility that hair dyeing power and dyeing fastness may not fully be obtained. On the other hand, if it exceeds 10.0% by mass, the hair feel may be heavy.

  The acidic hair dye composition contains (A) at least one selected from black 401, purple 401, and Daidai 205 as the acidic dye. Black 401 is an acidic dye also called naphthol blue black. According to the IUPAC (International Union of Pure and Applied Chemistry) nomenclature, Disodium 1 4-amino-5-hydroxy-3- (4- nitrophenylazo) -6-phenylazo-2,7-naphthalenedisulfate. Purple No. 401 is an acidic dye, which is also referred to as “Alizurol Purple”, and is expressed as “Sodium 2-N-[(9,10-dihydro-4-hydroxy-9,10-dioxanthryl] amino-5-methylbenzosulfonate” in the IUPAC nomenclature. Color No. 205 is an acidic dye, also called Orange II, and is represented by Sodium 4- (2-hydroxynaphthylazo) benzenesulphonate in the IUPAC nomenclature.

  The content of the acidic dye (A) in the acidic hair dye composition is preferably 0.01 to 5.0% by mass, more preferably 0.1 to 2.0% by mass. (A) When content of acidic dye is less than 0.01 mass%, there exists a possibility that the hair dyeing effect may not fully be acquired. On the other hand, when it mixes exceeding 5.0 mass%, it becomes difficult to improve the hair dyeing effect.

  The acidic hair dye composition may contain a dye other than the above-described (A) acidic dye as necessary. Examples of dyes other than the above-described (A) acid dyes include nitro dyes, azo dyes, nitroso dyes, triphenylmethane dyes, xanthene dyes, quinoline dyes, anthraquinone dyes, and indigo dyes. More specifically, acid dyes and the like determined by the “Ministerial Ordinance for Determining Tar Dyes that can be Used for Pharmaceuticals” (1960 Notification, Ministry of Health and Welfare), specifically, Red No. 2, Red No. 3, Red No. 102, Red No. 104 (1), Red No. 105 (1), Red No. 106, Red No. 201, Red No. 227, Red No. 230 (1), Red No. 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 No. 203, Yellow No. 402, Yellow No. 403 (1), Yellow No. 406, Yellow No. 407, Dai No Color 207, Dai No Color 402, Green No. 3, Green No. 204, Green No. 205, Green 401, green 402, blue 1 Blue 2, Blue 202, Blue 203, Blue 205, Brown 201, Acid Blue 1, Acid Blue 3, Acid Blue 62, Acid Black 52, Acid Brown 13, Acid Green 50, Acid Orange 6, Acid Red 14, acid red 35, acid red 73, acid red 184, brilliant black 1, and the like.

  (B) The alkylene glycol ester is blended in order to improve the uniformity of dyeing in the dyeing with the acid dye (A) described above. (B) The alkylene glycol ester is a compound represented by the following general formula (1).

In the general formula (1), B represents a single bond or a hydrocarbon group having 1 to 22 carbon atoms, and the hydrocarbon group as B is a linear or branched hydrocarbon group, saturated or It may be unsaturated. R ¹ is an alkyloxy group represented by the following general formula (2).

In the general formula (2), R ² represents hydrogen or a hydrocarbon group having 1 to 22 carbon atoms, and the hydrocarbon group as R ² is a linear or branched hydrocarbon group, It may be saturated or unsaturated. x and y are the same or different integers of 1 or more, and one of x and y may be 0. That is, among the alkyloxy groups represented by the general formula (2), the alkyloxy groups in which either one of x and y is 0 are represented by the following general formulas (3) and (4).

In general formula (3), x is an integer of 1 or more.

In general formula (4), y is an integer of 1 or more.

  The (B) alkylene glycol ester represented by the general formula (1) is an alkylene glycol ester of an aliphatic dicarboxylic acid that is a dibasic acid, and (B) the aliphatic dicarboxylic acid from which the alkylene glycol ester is derived is Examples thereof include oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, fumaric acid, maleic acid and the like. Among the (B) alkylene glycol esters, one kind selected from diethoxyethyl succinate, POE (10) POP (2) dimyristyl adipate, and POP (3) dimyristyl adipate from the viewpoint of excellent action and effect described above. preferable. In the “International Cosmetic Ingredient Dictionary and Handbook” (ICID, issued by the American Cosmetic Industry Association), diethoxyethyl succinate is listed as “DIETHOXYETHYL SUCCINATE”, and adipic acid POE (10) POP (2) dimyristyl is “ DI-PPG-2 MYRETH-10 ADIPATE ”and POP (3) dimyristyl adipate are listed as“ DI-PPG-3 MYRISTYL ETHER ADIPATE ”.

  Here, generally, when an acid dye adheres to the scalp and the scalp is dyed, the color of the scalp tends to hardly fall off. For this reason, when apply | coating acidic hair dye to the root part of hair, it is preferable to apply | coat so that acid hair dye may not adhere to a scalp as much as possible. In particular, when hair that has newly grown after hair dyeing is further dyed, by applying acidic hair dye at the root part of the hair so that the acid hair dye does not adhere to the scalp, the newly developed root The hair coloring power can be exerted on the hair of the part. However, at the base part of the hair, when applying the acidic hair dye and leaving it to stand, due to the effect of sebum etc., the acidic hair dye moves in the direction of the hair tip, so that the hair coloring power to the root part is sufficiently obtained. It tends to be difficult. Among the (B) alkylene glycols represented by the general formula (1), from the viewpoint that the hair dyeing power with respect to such a root portion can be sufficiently obtained, B in the general formula (1) preferably has 4 or more carbon atoms. Alkylene glycol ester which is alkylene, more preferably at least one of POE (10) POP (2) dimyristyl adipate and POP (3) dimyristyl adipate. In the alkylene glycol ester in which B in the general formula (1) is an alkylene having 4 or more carbon atoms, it is presumed that the hydrophobic alkylene chain improves the familiarity of the acidic hair dye with respect to the root part of the hair. As a result, the hair dyeing power with respect to the root part of the hair is easily exhibited.

  Content of (B) alkylene glycol ester in an acidic hair dye composition becomes like this. Preferably it is 0.1-30.0 mass%, More preferably, it is 0.5-25.0 mass%. (B) When content of alkylene glycol ester is less than 0.1 mass%, there exists a possibility that the effect mentioned above may become difficult to be acquired notably. On the other hand, when it exceeds 30.0 mass%, there is a possibility that the feel of hair becomes heavy.

  The blending amount of (B) alkylene glycol ester with respect to (A) acid dye is a mass ratio of (A) acid dye and (B) alkylene glycol ester, and is preferably in the range of 1: 100 to 1: 2. preferable. By blending the (B) alkylene glycol ester within this range, it is easier to suppress fading after hair dyeing, and it becomes easy to remarkably increase the uniformity of dyeing.

The acidic hair dye composition of the present embodiment can be blended with a hair penetrating agent from the viewpoint of improving the hair dyeing power by increasing the permeability of (A) the acidic dye to the hair.
Examples of the hair penetrant 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, n-octanol and the like. Examples of the ethylene glycol alkyl ether include ethylene glycol mono n-butyl ether. Aromatic alcohols include benzyl alcohol, 2-phenylethyl alcohol, cinnamyl alcohol, phenylpropanol, 1-phenoxy-2-propanol, phenyl diglycol, α-methylbenzyl alcohol, dimethylbenzyl carbinol, benzyloxyethanol, phenoxyethanol , Phenoxyisopropanol, p-anisyl alcohol, and the like. Examples of the cyclic alcohol include cyclohexanol. Examples of the lower alkylene carbonate include ethylene carbonate and propylene carbonate.

Among the hair penetrants, aromatic alcohol is preferable from the viewpoint of excellent effect of improving hair dyeing power.
The content of the hair penetrant in the acidic hair dye composition is preferably 0.01 to 3% by mass, more preferably 0.05 to 2% by mass, and still more preferably 0.1 to 1% by mass. Since the hair dyeing power is improved by blending the (B) alkylene glycol ester, the acidic hair dye composition of the present embodiment can reduce the blending amount of the hair penetrant. In particular, when an aromatic alcohol is blended as a hair penetrant, it is easy to significantly increase the hair dyeing power even when the blending amount is, for example, 3% by mass or less. For this reason, the solvent odor resulting from the mixing | blending of aromatic alcohol can be reduced.

  In the acidic hair dye composition of the present embodiment, water is used as a dispersion medium or a solvent for the components described above. Moreover, a hydrophilic organic solvent, an oil component, surfactant, etc. can also be mix | blended with an acidic hair dye composition as needed.

  Examples of the hydrophilic 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).

Examples of the oil component include fats and oils, waxes, higher alcohols, higher fatty acids, esters, silicones, hydrocarbons and the like.
Oils 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, cocoa 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, palm oil, mink oil, egg yolk oil, etc. Is mentioned. Examples of waxes include beeswax, candelilla wax, carnauba wax, jojoba oil, and lanolin.

  Higher alcohols include lauryl alcohol, myristyl alcohol, cetyl alcohol (cetanol), stearyl alcohol, cetostearyl alcohol, aralkyl alcohol, behenyl alcohol, 2-hexyldecanol, isostearyl alcohol, 2-octyldodecanol, decyltetradecanol, oleyl Alcohol, linoleyl alcohol, linolenyl alcohol, lanolin alcohol, etc. are mentioned. 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. It is done.

  Esters include diisopropyl adipate, diisobutyl adipate, dioctyl adipate, 2-hexyldecyl adipate, diisostearyl adipate, isopropyl myristate, cetyl octanoate, cetyl isooctanoate, isononyl isononanoate, 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, fatty acid (C10-30) (choleste / Lanosteryl lactate), 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 thereof include esters, N-alkyl glycol monoisostearate, cetyl caprate, glyceryl tricaprylate, neopentyl glycol dicaprate, diisostearyl malate, and lanolin derivatives.

  Examples of silicones 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 thereof include silicone, fluorine-modified silicone, cyclic silicone, alkyl-modified silicone, and polyether-modified silicone.

  Examples of the hydrocarbon include α-olefin oligomer, light isoparaffin, light liquid isoparaffin, liquid isoparaffin, liquid paraffin, squalane, polybutene, paraffin, polyethylene powder, microcrystalline wax, petrolatum and the like.

Examples of the surfactant include nonionic surfactants, cationic surfactants, anionic surfactants, and amphoteric surfactants.
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 polyoxyethylene (hereinafter referred to as POE) cetyl ether, POE stearyl ether, POE behenyl ether, POE oleyl ether, POE lauryl ether, POE octyldodecyl ether, POE hexyl. Examples include decyl ether, POE isostearyl ether, POE nonyl phenyl ether, POE octyl phenyl ether, and the like.

  Specific examples of the ester type nonionic surfactant include POE sorbitan monooleate, POE sorbitan monostearate, POE sorbitan monopalmitate, POE sorbitan monolaurate, POE sorbitan trioleate, POE glycerin monostearate, monoester Myristic acid POE glycerin, tetraoleic acid POE sorbite, hexastearic 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 glycerin , Lipophilic glyceryl monostearate, self-emulsifying glyceryl monostearate, sorbitan monooleate, sesquiolei Sorbitan acid, sorbitan trioleate, sorbitan monostearate, sorbitan monopalmitate, sorbitan monolaurate, sucrose fatty acid ester, decaglyceryl monolaurate, decaglyceryl monostearate, decaglyceryl monooleate, decaglyceryl monomyristate, etc. Is mentioned.

  Cationic surfactants 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 fatty acid Examples thereof include aminopropylethyldimethylammonium, stearyltrimethylammonium saccharin, cetyltrimethylammonium saccharin, and methyl behenyltrimethylammonium sulfate.

  Examples of anionic surfactants include alkyl sulfate salts such as sodium lauryl sulfate and triethanolamine lauryl sulfate, alkyl ether sulfate salts such as sodium POE lauryl ether sulfate, sodium stearoylmethyl taurate, triethanolamine dodecylbenzenesulfonate, Examples include sodium tetradecene sulfonate, POE lauryl ether phosphate and salts thereof, N-lauroyl glutamates, and N-lauroylmethyl-β-alanine salts.

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

  Further, as other components, sugars such as sorbitol and maltose, preservatives such as paraben, chelating agents such as EDTA-2Na, phenacetin, 8-hydroxyquinoline, acetanilide, sodium pyrophosphate, barbituric acid, uric acid, tannic acid and the like Stabilizers, plant extracts, herbal extracts, vitamins, fragrances, ultraviolet absorbers and the like can be mentioned. Moreover, you may mix | blend at least 1 type chosen from what is listed in "quasi-drug material standard" (June 1991 issue, Yakuji Nippo).

  The acidic hair dye composition of this embodiment is prepared as an emulsion, a solution, a dispersion, or the like. The dosage form of the acidic hair dye composition is not particularly limited as long as it has a fluidity, and examples thereof include liquid, mist, foam, cream, and gel. The application method to hair is not specifically limited, The application method using a comb or a brush, the application method by a hand comb, the application method by spraying (spraying), etc. can be used. Such an acidic hair dye composition is allowed to stand for a predetermined time after being applied to the hair. The hair is dyed in a desired color tone by (A) adsorption of the acid dye on the surface and penetration of the (A) acid dye into the hair. At this time, the (B) alkylene glycol ester represented by the general formula (1) has a single bond or a hydrocarbon group represented by B in the general formula (1), and a site centered on the carbonyl group and the site thereof. It has two alkyloxy groups located symmetrically. Such (B) alkylene glycol ester is presumed to penetrate (A) the acid dye into the hair so as to wrap the molecule of (A) the acid dye by a pair of hydrophilic sites. It is presumed that the penetrating power of the (A) acid dye to the hair is moderately adjusted by the interaction between the (B) alkylene glycol ester and the (A) acid dye. For example, it is speculated that (A) the penetrating power of acid dyes is exerted in a well-balanced manner with respect to sites where differences in the chemical properties of hair proteins are likely to occur, such as the hair tip site and the root vicinity site, Variation in color tone is suppressed in the hair after dyeing.

According to the embodiment described in detail above, the following effects are exhibited.
(1) In the acidic hair dye composition of the present embodiment, (A) as an acidic dye, at least one selected from black 401, purple 401, and Daidai 205, and the general formula (1) are shown. (B) An alkylene glycol ester is contained. By the way, in general, the hair dyeing power of an acid dye is improved by blending a hair penetrant such as an aromatic alcohol. In general, fading of hair dyed with an acid dye is suppressed by adding a hair penetrant such as an aromatic alcohol. However, in the above-mentioned (A) acidic dye, although the hair dyeing power and the like can be improved by blending a hair penetrant such as an aromatic alcohol, variation in color tone becomes remarkable in the hair after hair dyeing. The (B) alkylene glycol ester contained in the acidic hair dye composition of the present embodiment is capable of enhancing basic performances such as hair dyeing power and fastness, in addition to the above (A) acidic dye. A) When hair is dyed with an acid dye, variation in color tone can be suppressed. For this reason, according to the acidic hair dye composition of this embodiment, it is easy to increase the hair dyeing power and to suppress fading after hair dyeing, and to improve the uniformity of the color tone after dyeing.

  Moreover, since (B) alkylene glycol ester has the effect of improving hair dyeing power, even if it reduces the compounding quantity of hair penetrants, such as aromatic alcohol, sufficient hair dyeing power can be obtained. Therefore, the solvent odor resulting from the blending of such a hair penetrant can be reduced. Furthermore, since it is also possible to comprise an acidic hair dye composition without blending a hair penetrant, the solvent odor can be eliminated. Therefore, according to the acidic hair dye composition of the present embodiment, it is easy to reduce an unpleasant odor such as a solvent odor at the time of use. As a result, the hair dyeing treatment can be comfortably performed.

  (2) (A) Acid dye and (B) alkylene glycol ester are preferably contained in a mass ratio of 1: 100 to 1: 2. In this case, it is easy to remarkably improve the uniformity of the color tone after dyeing.

  (3) The acidic hair dye composition preferably further contains an aromatic alcohol as a hair penetrant. In this case, it is easy to significantly increase the hair coloring power. In addition, since the hair dyeing power of the acidic hair dye composition of the present embodiment is enhanced by the (B) alkylene glycol ester, the content can be reduced even when an aromatic alcohol is contained. It is. For this reason, even if it is a case where hair dyeing power is raised notably, as a result of being easy to reduce the solvent odor resulting from the mixing | blending of aromatic alcohol, it comes to be able to give a hair dyeing process comfortably. .

In addition, the said embodiment can also be changed and comprised as follows.
-Each component mix | blended with an acidic hair dye composition may be divided | segmented without mixing, and a some agent may be comprised and you may comprise so that these some agents may be mixed just before use.

  The product form of the acidic hair dye composition may be, for example, a color treatment in addition to the hair manicure. Hair nail polish is a hair dye that is dyed to a desired color tone by a single hair dyeing operation, whereas color treatment is applied to the hair by daily hair care or the like, so that the hair dyeing process is repeated. As a result, the hair dye is gradually dyed to a desired color tone. Even when the acidic hair dye composition of the present embodiment is applied to a color treatment, the effects described in the above section (1) can be exhibited each time the color treatment is used.

Next, the technical idea that can be grasped from the above embodiment will be described below.
The acidic hair dye composition in which the (B) alkylene glycol ester is one kind selected from diethoxyethyl succinate, POE (10) POP (2) dimyristyl adipate, and POP (3) dimyristyl adipate.

  An acidic hair dye composition containing 0.01 to 3% by mass of the aromatic alcohol.

Next, the embodiment will be described more specifically with reference to examples and comparative examples.
(Examples 1-18, Comparative Examples 1-9)
An acidic hair dye composition was prepared by mixing the components shown in Tables 1 and 2. The obtained acidic hair dye composition was applied to the hair bundle using a brush, allowed to stand at 45 ° C. for 10 minutes, and further allowed to stand at room temperature of 25 ° C. for 10 minutes. Thereafter, the hair bundle was subjected to plain rinsing (rinsing of the hair with water, warm water, etc.), washing with a shampoo and the like in order, and then the hair bundle was dried to give a hair dyeing treatment. The hair bundle subjected to the hair dyeing was evaluated for hair dyeing strength, dyeing fastness and level dyeing. In addition, during the hair dyeing treatment, the effect of reducing unpleasant odor when leaving the hair bundle to which the acidic hair dye composition was applied and the feel of the hair bundle during plain rinsing were evaluated.

In addition, the hair dyeing process in the evaluation of leveling property was performed in the same manner as the above hair dyeing process by changing the hair bundle to an experimental hair bundle described below.
Experimental hair bundle: A human hair bundle (30% white hair mixed hair bundle having a length of 20 cm from the hair tip to the root) is subjected to the following treatments (a) and (b) in order, and the hair tip Experimental hair bundles having different degrees of damage from the root to the root were prepared.

  (I) Using a commercially available bleaching agent (manufactured by Hoyu Co., Ltd., trade name: Beauteen Bleach Natural Brown), a decoloring treatment for decolorizing a region from the hair tip to 10 cm was repeated twice according to a conventional method.

  (B) For the hair bundle treated in (i) above, permanent parts are obtained by a conventional method using a commercially available permanent wave agent (product name: Promaster Wave LA / t, manufactured by Hoyu Co., Ltd.) for the part from the hair tip to 5 cm. Wave processing was performed.

Furthermore, using the acidic hair dye composition of each example, the ease of dyeing to the root was evaluated. The evaluation criteria for each evaluation are shown below, and the results of each evaluation item are also shown in each table. In addition, the unit of the numerical value which shows the compounding quantity in each table | surface is the mass%. In the <color name> column of each table, “DB” indicates dark brown, “VL” indicates violet, “OR” indicates orange, “P” indicates pink, and “B” indicates blue.
<Hair dyeing power>
For each of the hair bundles in each example, when the paneler visually observes the degree of color development, color development is excellent: ◎, color development is good: ◯, color development is slightly bad: △, and color development is bad: × evaluated.
<Dyeing fastness>
The hair bundle of each example left for one day after the hair dyeing treatment was immersed in a 1% sodium lauryl sulfate aqueous solution (500 ml) at 50 ° C. for 15 minutes, and then the hair bundle was sufficiently washed with water and air-dried. . As for fading of the hair bundle after the washing treatment, the panel has almost no fading and excellent dyeing fastness compared with the hair bundle before the washing treatment: ◎, less fading and good dyeing fastness: ○, The color fading was slightly noticeable and the dyeing fastness was somewhat poor: Δ, and the fading was noticeable and the dyeing fastness was poor: x.
<Uniformity>
For the hair bundle of each example, the panelist visually observes the uniformity of the color tone, whereby the leveling property is excellent: ◎, the leveling property is good: ◯, the leveling property is slightly bad: △, and leveling Poor nature: It evaluated in four steps of x.
<Reducing unpleasant odor>
In the hair dyeing process, the odor when the hair bundle coated with the acidic hair dye composition of each example is left at 45 ° C. has no unpleasant odor due to the smell of the panel and is excellent in reducing effect: ◎, almost unpleasant odor It was not felt and the reduction effect was good: ○, an unpleasant odor was felt, the reduction effect was slightly poor: Δ, and an unpleasant odor was felt strongly, and the reduction effect was not obtained: Evaluation was made in four stages.
<Hair feel during plain rinse>
In the hair dyeing process, the hair feel when the hair bundle coated with the acidic hair dye composition of each example was plain rinsed was excellent in touch by the touch of the panel by the paneler: ◎, good touch: ○, touch Slightly bad: △ and bad feeling: evaluated in 4 grades.
<Ease of dyeing at the root>
A hair dye test using the acidic hair dye composition of each example was performed on the gray hair mixed model. In this hair dyeing test, the hair dyeing treatment of each example was performed in the same manner as the hair dyeing treatment described above except that the acidic hair dye composition of each example was applied to the base of the hair so as not to adhere to the scalp. did. The paneler visually observes the extent to which the hair root is dyed, whereby the dyeability is excellent: ◎, the dyeability is good: ◯, the dyeability is slightly bad: △, and the dyeability is bad: × The four grades were evaluated.

As shown in Table 1, in each Example and each Reference Example , excellent or good results were obtained for all items of hair dyeing power, dyeing fastness, and leveling property. On the other hand, as shown in Table 2, in each comparative example, the result of a defect or a somewhat defect was obtained about at least one item of hair dyeing power, dyeing fastness, and leveling property. From the results of each example and each reference example , the combination of the above (A) acidic dye and the above (B) alkylene glycol ester is easy to increase the hair dyeing power and suppress fading after hair dyeing, It turns out that it becomes easy to improve the uniformity of the color tone after dyeing. In each example and each reference example , excellent or good results were obtained with respect to the effect of reducing unpleasant odor, the feeling during plain rinse, and the ease of dyeing at the root.

In Examples 2, 3, 5, 6 , 8, 9, 11, 12 and Reference Examples 1 , 4, 7 , and 10 , the (A) acid dye and the (B) alkylene glycol ester were in the range of 1: 100 to 1 : Since it was mix | blended by the mass ratio of 2, the result excellent in dyeing fastness and leveling property was obtained. In Examples 2, 3, 8, 9, 11, and 12 and Reference Examples 1 , 7, and 10 , since aromatic alcohol was contained as a hair penetrating agent, excellent results for hair dyeing power were obtained.

  On the other hand, although the aromatic alcohol was mix | blended as a hair penetrant in the comparative example 1, the leveling property was unsatisfactory. Thus, even if it mix | blends a hair penetrating agent with respect to the said (A) acidic dye, it cannot implement | achieve dyeing without a nonuniformity. In Comparative Examples 2 and 3, POE (40) hydrogenated castor oil or dioctyl succinate is blended in addition to the acid dye (A). Here, POE (40) hydrogenated castor oil and dioctyl succinate are structurally similar to the (B) alkylene glycol ester. However, in Comparative Examples 2 and 3, poor results were obtained for all items of hair dyeing power, dyeing fastness, and leveling property.

  In Comparative Examples 4 to 9, an acidic dye other than the (A) acidic dye and the (B) alkylene glycol ester are blended. However, in Comparative Examples 4 to 9, since the hair dyeing power and leveling property were poor or somewhat poor, the above (B) alkylene glycol ester had an excellent effect on the above (A) acidic dye. You can see that it works.

Claims (3)

An acidic hair dye composition containing at least one pH adjuster selected from organic acids and organic acid salts, and a thickener,
(A) As an acidic dye, it contains at least one selected from black No. 401, purple No. 401, and orange No. 205, and also contains (B) an alkylene glycol ester represented by the following general formula (1). A characteristic acid hair dye composition.
In the general formula (1), B is Ru alkylene der having a carbon number of 4-22. R ¹ is an alkyloxy group represented by the following general formula (2).
In the general formula (2), R ² represents hydrogen or a hydrocarbon group having 1 to 22 carbon atoms, and the hydrocarbon group as R ² is a linear or branched hydrocarbon group, It may be saturated or unsaturated. x and y are the same or different integers of 1 or more, and one of x and y may be 0. 2. The acidic hair dye composition according to claim 1, comprising (A) the acidic dye and (B) the alkylene glycol ester in a mass ratio of 1: 100 to 1: 2. 3. The acidic hair dye composition according to claim 1 or 2, further comprising an aromatic alcohol as a hair penetrating agent.