JP2015017138A - Hair cosmetic composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hair cosmetic composition which can improve preservation stability in a hair cosmetic composition using a carbonic acid ammonium salt.SOLUTION: A hair cosmetic composition used as a hair dye or a hair bleaching agent consists of a first agent containing (A) a carbonic acid ammonium salt and (B) phosphate, and having a pH of 8.5-9.5; and a second agent containing an oxidizing agent. Preferably, the content of (A) carbonic acid ammonium in the first agent is 2.5-16 mass%, and the content of (B) phosphate is 0.2-2.5 mass% in terms of phosphate anhydride.

Description

  The present invention relates to a hair cosmetic composition containing a carbonate-based ammonium salt and used as a hair dye or a hair bleaching agent, and more specifically, a hair cosmetic with improved storage stability of a carbonate-based ammonium salt. Relates to the composition.

  Generally, a hair cosmetic composition that exhibits an effect by mixing a plurality of drugs is known. As such a hair cosmetic composition, for example, hair dyes and hair bleaching agents composed of a first agent containing an alkaline agent and a second agent containing an oxidizing agent such as hydrogen peroxide are known. It has been. The alkali agent promotes the action of the oxidizing agent contained in the second agent and improves the dyeability by swelling the hair and improving the permeability of the dye into the hair. Conventionally, ammonia and alkanolamines are known as alkaline agents used in hair dyes and hair bleaching agents. However, ammonia has a problem that it causes an irritating odor when the blending amount is increased. Further, when the alkanolamine is added in a large amount, there is a possibility that the hair feel is reduced due to the residue after washing and the scalp is irritated.

  Therefore, conventionally, hair cosmetic compositions disclosed in Patent Documents 1 to 5 are known. For example, Patent Documents 1 to 3 use ammonia or an alkanolamine in combination with a carbonate-based ammonium salt to reduce the blending amount of ammonia or alkanolamine as compared with the prior art and improve the hair dyeing power. Further, as disclosed in Patent Documents 4 and 5, hair dyes and hair bleaching agents that do not use ammonia or alkanolamine in combination by increasing the amount of ammonium carbonate are known.

JP 2008-127343 A JP 2004-262885 A JP 2001-328926 A JP 2006-526655 A Special table 2008-521833 gazette

  However, since the hair cosmetic compositions disclosed in Patent Documents 1 to 3 still use ammonia or an alkanolamine, there are problems such as an irritating odor caused by ammonia or a decrease in hair feel due to residual alkanolamine. There was a risk of it occurring. Further, the hair dyes and hair bleaching agents disclosed in Patent Documents 4 and 5 have a problem that the solubility of ammonium carbonate is low. In particular, when applied to a hair cosmetic composition in a form in which a plurality of drugs are mixed, there is a problem that in a chemical solution containing ammonium carbonate, if the ammonium carbonate concentration is high, the chemical solution may be severely separated during storage. Furthermore, there is a problem that it is difficult to re-dissolve the vigorously separated chemical solution and storage stability is poor. In particular, the agent type that is pressurized and stored, such as the aerosol type, is more likely to be separated, and the agent type that is foamed cannot be vigorously shaken because it foams when shaken. Therefore, it has been required to improve the storage stability in hair cosmetic compositions containing a carbonate-based ammonium salt.

  The present invention has been made by finding that the above problems can be solved by using a phosphate in combination with a carbonate-containing ammonium salt as a result of intensive studies by the present inventors. . An object of the present invention is to provide a hair cosmetic composition capable of improving storage stability in a hair cosmetic composition using a carbonated ammonium salt.

  In order to achieve the above object, the hair cosmetic composition of the invention according to claim 1 contains (A) a carbonate-based ammonium salt and (B) a phosphate, and has a pH of 8.5-9. And a second agent containing an oxidizing agent, and is used as a hair dye or hair bleaching agent.

  The invention according to claim 2 is the hair cosmetic composition according to claim 1, wherein the content of the (A) carbonate ammonium salt in the first agent is 2.5 to 16% by mass. It is characterized by that.

  The invention according to claim 3 is the hair cosmetic composition according to claim 1 or 2, wherein the content of (B) phosphate in the first agent is converted to phosphate anhydride. In this case, the content is 0.2 to 2.5% by mass.

  The invention according to claim 4 is the hair cosmetic composition according to any one of claims 1 to 3, wherein (B) phosphate anhydride of phosphate in the first agent is used. The mass ratio of the content of (A) carbonic acid ammonium salt to the content when converted is 1 to 7.5.

  According to the present invention, the storage stability can be improved in a hair cosmetic composition using a carbonated ammonium salt.

(First embodiment)
Hereinafter, a first embodiment in which the hair cosmetic composition according to the present invention is embodied as a hair bleaching agent will be described in detail. The hair bleaching agent according to the present embodiment is a two-component hair cosmetic comprising a first agent and a second agent.

<First Agent>
The first agent contains (A) a carbonate-based ammonium salt and (B) a phosphate, and the pH is adjusted to 8.5 to 9.5.

  (A) Carbonic acid ammonium salt is mix | blended in order to improve the lightness of the hair after a hair decoloring agent process. Examples of (A) carbonate-based ammonium salts include ammonium carbonate, ammonium hydrogen carbonate, and ammonium carbamate. Among these, ammonium carbonate and ammonium hydrogen carbonate are preferable, and ammonium carbonate is more preferable from the viewpoint of storage stability and improvement of lightness of the hair after decoloring treatment.

  The content of the (A) carbonic acid ammonium salt in the first agent is preferably 2.5 to 16% by mass, more preferably 5 to 10% by mass. The content of the (A) carbonate ammonium salt in the mixture of the first agent and the second agent is preferably 0.63 to 8% by mass, more preferably 2.5 to 5% by mass. is there. If the content of the (A) carbonic acid ammonium salt in the first agent is less than 2.5% by mass, the lightness of the hair after the decolorization treatment may not be sufficiently improved. When the content of the (A) carbonated ammonium salt exceeds 16% by mass, the carbonated ammonium salt is not sufficiently dissolved, so that the storage stability of the first agent may be reduced due to separation of the chemical solution.

  (B) Phosphate is blended to improve the solubility of (A) carbonated ammonium salt, improve the storage stability of the first agent, and improve the lightness of the hair after decoloring treatment. Examples of the phosphate include diammonium hydrogen phosphate, disodium hydrogen phosphate, dipotassium hydrogen phosphate, potassium hydrogen phosphate, ammonium dihydrogen phosphate, potassium dihydrogen phosphate, sodium dihydrogen phosphate, phosphoric acid These include triammonium, trisodium phosphate, tripotassium phosphate, and sodium ammonium hydrogenphosphate. Among these, trisodium phosphate, disodium hydrogen phosphate, and sodium dihydrogen phosphate are preferable from the viewpoint of storage stability of carbonated ammonium salt and improvement of lightness of hair after decolorization treatment, and phosphoric acid is more preferable. Trisodium is more preferred.

  The content of (B) phosphate in the first agent is preferably 0.2 to 2.5 mass%, more preferably 0.5 to 2.5 mass%, when converted to phosphate anhydride. It is. Moreover, the content of the (B) phosphate in the mixture in which the first agent and the second agent are mixed is preferably 0.05 to 1.25% by mass when converted to phosphate anhydride. Preferably it is 0.25-1.25 mass%. When the content of (B) phosphate in the first agent is less than 0.2% by mass, the storage stability of the first agent may not be improved by increasing the solubility of the (A) carbonated ammonium salt. is there. If the content of (B) phosphate exceeds 2.5% by mass, the (B) phosphate is not sufficiently dissolved, so that the storage stability of the first agent may not be improved.

  The mass ratio (A / B) of the content of (A) carbonic acid ammonium salt to the content when converted to phosphate anhydride of (B) phosphate in the first agent is preferably 1 to 7.5, more preferably 4-7. If this mass ratio is less than 1, the storage stability of the first agent may not be improved. On the other hand, if the mass ratio exceeds 7.5, the storage stability of the first agent may not be improved, and accordingly, the lightness of the hair after decolorization may be reduced.

  The sum of the content of (A) carbonate-based ammonium salt and the content of (B) phosphate anhydride of phosphate in the first agent is preferably 2 to 20% by mass. If the total content is less than 2% by mass, the lightness of the hair after decoloring treatment may not be improved. On the other hand, when the total content exceeds 20% by mass, the (A) carbonic acid ammonium salt and (B) phosphate are not sufficiently dissolved, and thus the storage stability of the first agent may not be improved.

  The pH of the first agent is adjusted to a range of 8.5 to 9.5, preferably 8.8 to 9.5. If the pH of the first agent is less than 8.5, when the first agent is mixed with the second agent, the action of hydrogen peroxide, for example, may not be sufficiently promoted as an oxidizing agent contained in the second agent. . In addition, the storage stability of the first agent is reduced. When the pH of the first agent exceeds 9.5, the storage stability of the first agent is lowered, and the lightness of the hair after decoloring treatment may be lowered. The pH of the first agent is appropriately adjusted by changing the blending amounts of (A) a carbonate-based ammonium salt, (B) phosphate, and a pH adjuster described later.

  The first agent is a component other than those described above, for example, water, water-soluble polymer compound, oil component, polyhydric alcohol, surfactant, sugar, preservative, stabilizer, pH adjuster, plant, if necessary. Extracts, herbal extracts, vitamins, fragrances, antioxidants, UV absorbers, and chelating agents may be included.

  Water acts as a solubilizer for each component. Examples of the water-soluble polymer compound include an anionic polymer compound, a cationic polymer compound, a nonionic polymer compound, and an amphoteric natural or synthetic polymer compound. Examples of the cationic polymer compound include a polydimethylmethylene piperidinium liquid. Examples of the nonionic synthetic polymer compound include polyethylene glycol.

  The oily component imparts a moist feeling to the hair. Therefore, the first agent 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 fats and oils include lanolin, olive oil, camellia oil, shea fat, almond oil, safflower oil, sunflower oil, soybean oil, cottonseed oil, sesame oil, corn oil, rapeseed oil, rice bran oil, rice germ oil, grape seed oil, avocado Oil, macadamia nut oil, castor oil, coconut oil, and evening primrose oil. Examples of the wax include beeswax, candelilla wax, carnauba wax, jojoba oil, and lanolin. Examples of higher alcohols include cetyl alcohol (cetanol), 2-hexyldecanol, stearyl alcohol, isostearyl alcohol, cetostearyl alcohol, oleyl alcohol, aralkyl alcohol, behenyl alcohol, 2-octyldodecanol, lauryl alcohol, myristyl alcohol, decyltetra Examples include decanol and lanolin alcohol.

  Examples of the hydrocarbon include paraffin, olefin oligomer, polyisobutene, hydrogenated polyisobutene, mineral oil, squalane, polybutene, polyethylene, microcrystalline wax, and petrolatum. Examples of the higher fatty acid include lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, isostearic acid, 12-hydroxystearic acid, oleic acid, and lanolin fatty acid. Examples of the alkyl glyceryl ether include batyl alcohol, chimyl alcohol, ceralkyl alcohol, and isostearyl glyceryl ether.

  Examples of esters include diisopropyl adipate, isopropyl myristate, cetyl octanoate, isononyl isononanoate, octyldodecyl myristate, isopropyl stearate, stearyl stearate, myristyl myristate, isotridecyl myristate, 2-ethylhexyl palmitate, Octyldodecyl ricinoleate, fatty acid cholesteryl / lanosteryl having 10 to 30 carbon atoms, cetyl lactate, lanolin acetate, ethylene glycol di-2-ethylhexanoate, pentaerythritol fatty acid ester, dipentaerythritol fatty acid ester, cetyl caprate, tricapryl Examples include glyceryl acid, diisostearyl malate, dioctyl succinate, and cetyl 2-ethylhexanoate.

  Examples of the silicone include dimethylpolysiloxane (dimethicone), methylphenylpolysiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, terminal hydroxyl group-modified dimethylpolysiloxane, and a highly polymerized silicone having an average degree of polymerization of 650 to 10,000. , Polyether modified silicone, amino modified silicone, betaine modified silicone, alkyl modified silicone, alkoxy modified silicone, mercapto modified silicone, carboxy modified silicone, and fluorine modified silicone. Among the specific examples of these oily components, only one kind may be contained alone, or two or more kinds may be contained in combination.

  Examples of the polyhydric alcohol include glycol and glycerin. Examples of the glycol include ethylene glycol, diethylene glycol, triethylene glycol, polyethylene glycol, propylene glycol, dipropylene glycol, isoprene glycol, and 1,3-butylene glycol. Examples of glycerin include glycerin, diglycerin, and polyglycerin.

  The surfactant emulsifies or solubilizes the hair bleaching agent as an emulsifier or a solubilizer of each component, and adjusts the viscosity or improves the viscosity stability. 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 ether sulfate, alkyl sulfate, alkenyl ether sulfate, alkenyl sulfate, olefin sulfonate, alkane sulfonate, saturated or unsaturated fatty acid salt, alkyl or alkenyl ether carboxylic acid. Examples include salts, α-sulfone fatty acid salts, N-acyl amino acid type surfactants, phosphate mono- or diester type surfactants, and sulfosuccinates. Examples of the counter ion of the anionic group of these surfactants include sodium ion, potassium ion, and triethanolamine. Examples of the alkyl sulfate include sodium lauryl sulfate.

  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, methacryloyloxyethyltrimethylammonium chloride, and behenyltrimethylammonium methylsulfate.

  Examples of amphoteric surfactants include cocobetaine, lauramidopropyl betaine, cocamidopropyl betaine, sodium lauroamphoacetate, sodium cocoamphoacetate, and lauryl betaine (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, polyoxyethylene (hereinafter referred to as POE) cetyl ether (cetes), POE stearyl ether (steales), POE behenyl ether, POE oleyl ether (ores), POE. Examples include lauryl ether (laureth), POE octyl dodecyl ether, POE hexyl decyl ether, POE isostearyl ether, POE nonyl phenyl ether, and POE octyl phenyl ether.

  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. Among the specific examples of these surfactants, only one kind may be contained alone, or two or more kinds may be contained in combination.

  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. Examples of the pH adjuster include lactic acid, levulinic acid, glycolic acid, tartaric acid, malic acid, pyrrolidone carboxylic acid (PCA), succinic acid, citric acid, glutamic acid, 2-amino-2-methyl-1-propanol (AMP), Examples include triethanolamine (TEA) and arginine. Examples of the antioxidant include ascorbic acid and sulfite. Examples of the chelating agent include ethylenediaminetetraacetic acid (EDTA), diethylenetriaminepentaacetic acid and salts thereof, and hydroxyethanediphosphonic acid (HEDP) and salts thereof.

  The dosage form of the first agent is not particularly limited, and specific examples include liquid, gel, foam, and cream. Examples of the liquid include aqueous solutions, dispersions, and emulsions.

<Second agent>
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. 0% by mass. If the content of the oxidizing agent is less than 0.1% by mass, melanin may not be sufficiently decolorized. When the content of the oxidizing agent exceeds 15.0% by mass, there is a risk that defects such as damage occur on the hair.

  When hydrogen peroxide is blended in the second agent as an oxidizing agent, the second agent is preferably a stabilizer such as ethylene glycol phenyl ether (phenoxyethanol), 1- Contains hydroxyethane-1,1-diphosphonic acid and its salts. Examples of the 1-hydroxyethane-1,1-diphosphonate include tetrasodium 1-hydroxyethane-1,1-diphosphonate and disodium 1-hydroxyethane-1,1-diphosphonate. A 2nd agent may contain each component generally contained in a hair bleaching agent, and does not inhibit the effect | action of each component mentioned above. For example, you may contain suitably components other than (A) carbonate type ammonium salt contained in the 1st agent mentioned above.

  The dosage form of the second agent is not particularly limited, and specific examples include, for example, liquid, gel, foam, and cream. Examples of the liquid include aqueous solutions, dispersions, and emulsions. When the hair bleaching agent is used, a mixture is prepared by mixing the first agent and the second agent. The required amount of the mixture is then applied to the hair, attached to a comb or brush.

The hair bleaching agent according to this embodiment has the following advantages.
(1) The hair bleaching agent according to this embodiment comprises (A) a carbonate-based ammonium salt and (B) a first agent having a pH of 8.5 to 9.5, and an oxidizing agent. And a second agent containing Therefore, the storage stability of the first agent containing a carbonate-based ammonium salt can be improved. Moreover, the brightness of the hair after a decoloring process can be improved.

  (2) The hair bleaching agent which concerns on this embodiment is comprised from the 1st agent containing (A) carbonate-type ammonium salt and (B) phosphate, and the 2nd agent containing an oxidizing agent. Accordingly, it is possible to suppress a decrease in the feel of hair and stimulation to the scalp due to an irritating odor caused by ammonia or residual alkanolamine.

  (3) Preferably, the content of the (A) carbonic acid ammonium salt in the first agent is 2.5 to 16% by mass. In this case, the lightness of the hair after the decolorization treatment can be further improved, and a decrease in the storage stability of the first agent due to the separation of the chemical solution can be suppressed.

  (4) Preferably, the content of (B) phosphate in the first agent is 0.2 to 2.5% by mass when converted to phosphate anhydride. In this case, (A) the solubility of the carbonate-based ammonium salt in the first agent can be further improved, and the storage stability can be improved.

  (5) Preferably, the mass ratio of the content of (A) carbonate-based ammonium salt to the content when converted to phosphate anhydride of (B) phosphate in the first agent is 1 to 7. 5. Therefore, the brightness of the hair after decoloring treatment can be further improved. Moreover, the storage stability of the first agent can be further improved.

The embodiment may be modified as follows.
In the first agent, the hair bleaching agent of the above embodiment is an alkaline agent, for example, ammonia, alkanolamine, organic amines, inorganic alkali, basic amino acid, and the like thereof, as long as the purpose and effect of the present invention are not impaired. A salt may be contained.

(Second Embodiment)
Hereinafter, a second embodiment in which the hair cosmetic composition according to the present invention is embodied as a hair dye will be described. The hair dye according to the present embodiment is a two-component hair cosmetic comprising a first agent and a second agent.

The first agent contains (A) a carbonate-based ammonium salt and (B) a phosphate, and the pH is adjusted to 8.5 to 9.5. The first agent preferably contains an oxidation dye.
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 appropriately selected from dyes other than the above-mentioned oxidation dyes, for example, at least one selected from the oxidation dyes listed in the “Quasi-drug Raw Material Standards” (issued in June 1991, Yakuji Nippo) and direct dyes. You may contain.

The second agent in the hair dye is used for dyeing hair after being mixed with the first agent. The specific configuration of the second agent is the same as that of the second agent according to the first embodiment.
The dosage form of the first agent and the second agent is not particularly limited, and specific examples include liquid, gel, foam, and cream. Examples of the liquid include aqueous solutions, dispersions, and emulsions. When using the hair dye, a mixture is prepared by mixing the first agent and the second agent. The required amount of the mixture is then applied to the hair, attached to a comb or brush.

The hair dye according to the present embodiment has the following advantages in addition to the effects of the first embodiment.
(1) The hair dye according to the present embodiment contains (A) a carbonate-based ammonium salt and (B) a phosphate, the first agent having a pH of 8.5 to 9.5, and an oxidizing agent. And a second agent containing Therefore, the storage stability of the first agent containing a carbonate-based ammonium salt can be improved. Moreover, since the brightness of the hair after dyeing | staining process can be improved, it can dye more vividly.

Next, the embodiment will be described more specifically with reference to examples and comparative examples.
The 1st agent and 2nd agent of the hair bleaching agent containing each component shown in Tables 1-5 were prepared. The numerical value in the column which shows each component in Tables 1-5 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 hair bleaching agent was prepared. In addition, the 1st agent of the hair bleaching agent shown in Table 4 was prepared as an aerosol type consisting of 95% by mass of the first agent and 5% by mass of LPG. The obtained hair bleaching agent was applied to a black human hair bundle (hereinafter simply referred to as a hair bundle) using a brush and allowed to stand at room temperature (25 ° C.) for 30 minutes. Next, after the hair bleaching agent adhering to the hair bundle was washed away with water, the hair bundle was shampooed twice and rinsed once. Subsequently, the hair bundle was dried with warm air and then left for one day. The lightness of the hair bundle subjected to the decoloring treatment was evaluated according to the method described below. Moreover, storage stability was evaluated according to the method shown below about the 1st agent of the hair bleaching agent of each Example before a decoloring process and a comparative example.

  The notation of (A) and (B) in the “component” column in the table indicates a compound corresponding to each component described in the claims of this application. On the other hand, the notation “b” in the “component” column in the table indicates a comparative compound of each component described in the claims of this application.

  In addition, the column “(A) Carbonic ammonium salt mass ratio” in the table shows the mass of the content of (A) carbonated ammonium salt relative to the content of (B) phosphate in the first agent. The ratio (A / B) is shown.

<Storage stability>
About the 1st agent of the hair bleaching agent of each Example before a decoloring process and a comparative example, it puts into a glass bottle, and after storing it for one month in a 50 degreeC thermostat, the separation state of the 1st agent of a hair bleaching agent is visually observed. It was judged whether or not the effect of maintaining the dissolved state was good. Evaluation 5 with little separation, Evaluation 4 with little separation, Evaluation 3 with slight separation, Evaluation 2 with some separation, Evaluation 1 with significant separation 1 It was. The results are shown in Tables 1-4.

<Lightness>
10 panelists visually observe the lightness of human hair bundles after treatment with a hair bleaching agent under a standard light source. Excellent (5 points), good (4 points), good (3 points), slightly bad (2 points) ) And bad (1 point). An average value is calculated for each paneler's scoring results, and an average value of 4.6 or higher is “excellent: 5”, 3.6 or higher and lower than 4.6 is “good: 4”, 2.6 or higher 3 The evaluation result was determined as “possible: 3” for less than 6 points, “slightly defective: 2” for 1.6 points or more and less than 2.6 points, and “failure: 1” for 1 point or more and less than 1.6 points. The results are shown in Tables 1-4.

As shown in Tables 1 and 3, it was found that in the first agent of the hair bleaching agent according to each example, high storage stability and lightness were obtained for each comparative example. Moreover, it turned out that high storage stability and lightness are obtained with respect to each comparative example also about the aerosol type hair bleaching agent (Example 18) shown in Table 4 like the Examples of Tables 1 and 3. Further, Example 1 using (A) ammonium carbonate as a carbonate-based ammonium salt and (B) trisodium phosphate as a phosphate has higher storage stability and lightness than each comparative example. I understood. In the first agent, the mass ratio (A / B) of the content of the (A) carbonic acid ammonium salt to the content of the (B) phosphate is in the range of 1 to 7.5, and Examples 7, 8, 11, 14, and 15 in which the content of (B) phosphate in the first agent is in the range of 0.2 to 2.5 mass% are higher in storage than the comparative examples. It was found that stability and brightness were obtained.

  As shown in Table 2, Comparative Examples 1 and 2 in which the first agent of the hair bleaching agent contains an inorganic acid salt (sodium metasilicate) in place of (B) phosphate are storage stable for each example. It was found that the evaluation of property and brightness was low. It turned out that the comparative example 3 in which the 1st agent of a hair bleaching agent does not contain the (A) carbonate type ammonium salt has the lowest evaluation of the brightness with respect to each Example. It was found that Comparative Examples 4 and 5 in which the pH of the first agent was outside the range of 8.5 to 9.5 had the lowest evaluation of storage stability and lightness for each example.

Next, the technical idea that can be grasped from the above embodiment and other examples will be described below.
(A) A method for stabilizing a carbonated ammonium salt-containing solution, wherein a phosphate is added to a solution containing a carbonated ammonium salt and the pH is adjusted to 8.5 to 9.5.

Claims (4)

  It comprises (A) a carbonate-based ammonium salt and (B) a first agent having a pH of 8.5 to 9.5, and a second agent containing an oxidizing agent. Hair cosmetic composition used as an agent or hair bleaching agent.   The hair cosmetic composition according to claim 1, wherein the content of the (A) carbonate ammonium salt in the first agent is 2.5 to 16% by mass.   Content of (B) phosphate in said 1st agent is 0.2-2.5 mass% when converted into phosphate anhydride, Claim 1 or Claim 2 characterized by the above-mentioned. The hair cosmetic composition as described.   The mass ratio of the content of (A) carbonate-based ammonium salt to the content when converted to phosphate anhydride of (B) phosphate in the first agent is 1 to 7.5. The hair cosmetic composition according to any one of claims 1 to 3, wherein the hair cosmetic composition is characterized by the following.