JP2009209119A - Oxidant composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an oxidant composition obtaining an excellent hair clarity-improving effect even on blending a large amount of hydrogen peroxide, and without accompanying inconvenience based on the excessive blending of the hydrogen peroxide or an alkali agent. <P>SOLUTION: This oxidant composition prepared as a type of using a plurality of agents, which is mix-prepared at the time of use, comprises each of component (A): a 3.5 to 6 mass% hydrogen peroxide at the time of use, component (B1): a strong alkali and component (B2): ammonia, an ammonium salt or an alkanol amine, and having α≥β for the pH value α at the time of use of the composition with respect to the dissociation constant (pKa) value β of the component (B2). <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an oxidizing agent composition that is particularly excellent in the effect of improving hair brightness. Representative examples of the oxidant composition include an oxidative hair dye and a hair bleaching agent.

  In oxidant compositions such as oxidative hair dyes and hair bleaching agents, it is common to blend hydrogen peroxide as an oxidant and at least one selected from ammonia, ammonium salts or alkanolamines as an alkaline agent. It is. Moreover, it is an important subject to improve the brightness (hair brightness) of hair treated with an oxidative hair dye or a hair bleaching agent.

JP, 2002-104943, A In the above-mentioned patent documents 1, the hair bleaching agent which blended persulfate in Example 1 etc. is indicated. In conventional hair bleaching agents, it is common to add a persulfate, and in this case, the persulfate brings out the oxidative power of hydrogen peroxide to the maximum, so a significant improvement in hair brightness is expected. it can. However, there is a problem that the damage to the hair is significant. A composition obtained by removing an oxidative dye from a general oxidative hair dye can also be used as a hair bleaching agent. However, although the lightness of the hair is improved to some extent, further improvement in lightness is desired.

  Furthermore, with regard to the oxidation hair dye that simultaneously performs decolorization and hair dyeing of hair, persulfate destroys the oxidation dye, so that the persulfate cannot be added to the oxidation hair dye.

  On the other hand, it is known that the lightness of the hair is improved by increasing the blending amount of hydrogen peroxide in the oxidative hair dye or the hair bleaching agent. However, there is a tendency for the lightness of the hair to decrease when the pH during use decreases due to the increased amount of hydrogen peroxide. In response to this tendency, it is also conceivable to adjust the pH during use by increasing the blending amount of ammonia, ammonium salt or alkanolamine which is an alkaline agent. However, as is well known, when a large amount of ammonia or ammonium salt is added, problems such as increased skin irritation occur, and when a large amount of non-volatile alkanolamine is added, it remains on the hair and is damaged or touched. There is a problem of inviting worsening.

  It can be considered that a strong alkali component such as silicate is blended in place of the weak alkali component to adjust a decrease in pH during use due to an increased amount of hydrogen peroxide. However, when only a strong alkali component is blended as an alkali, the stability of the oxidative hair dye or hair bleaching cream is poor, and if these are liquid agents, the packaging container may be corroded. Although not clear, it has been found that the preferred brightness of the hair is not obtained.

  Therefore, the present invention provides an excellent effect of improving hair brightness when blended with hydrogen peroxide and an alkaline agent, and also contains a large amount of ammonia and ammonium salts, such as hair damage when blended with persulfate. It is a technical problem to be solved to provide an oxidant composition that does not suffer from problems such as strong skin irritation in the case of aging, hair damage and deterioration of touch when alkanolamine is added in a large amount.

  In the process of pursuing the means for solving the above problems, the inventor of the present application combines a weak alkaline component and a strong alkaline component with respect to hydrogen peroxide to adjust the pH of the oxidant composition to the dissociation constant of the weak alkaline component ( It has been found that when the pH is adjusted to a pH range of pKa) or higher, more preferably, a pH range higher than its dissociation constant by 0.5 or higher, a remarkable hair brightness improvement effect is obtained.

  That is, weakly alkaline components such as ammonia, ammonium salts, and alkanolamines that are blended efficiently increase hair lightness in a molecular state rather than in an ionic state. In other words, it is effective to maintain the pH value above the pKa value (for example, 9.25 for ammonia and 9.5 for monoethanolamine) in which ions and molecules of weak alkali components exist in a 1: 1 state. Brings rise. Thus, it is possible to increase the lightness of the hair without blending persulfate.

  On the other hand, when a weak alkali component is further added to increase the pH, there are problems such as irritating odor and skin irritation in the case of ammonia, and in the case of alkanolamine, there is a problem of deterioration of the hair feel due to the residue on the hair. There is. In the present invention, these problems are also solved by blending strong alkali such as sodium hydroxide and sodium metasilicate with a weak alkali component in a well-balanced manner.

(First invention)
The composition of the first invention of the present application for solving the above problems is formulated in a multiple-drug formulation that is mixed and prepared at the time of use, and contains at least the following components (A), (B1) and (B2), When (A) component and other said each component are mix | blended in different preparations, pH value (alpha) at the time of use is set to (B2) component dissociation constant (pKa) value (beta) It is an oxidizing agent composition in a pH range represented by α ≧ β.
Component (A): 3.5 to 6% by mass of hydrogen peroxide (B1) when used: Component: strong alkali (B2): at least one selected from ammonia, ammonium salt or alkanolamine The term “oxidizing agent composition (for example, an oxidative hair dye or a hair bleaching agent) formulated in a multi-drug form” refers to the time when the mixture is prepared. The “strong alkali” as the component (B1) mainly refers to an inorganic alkali and an alkaline substance having an ionization degree of 90% or more.

  The oxidizing agent composition of the first invention contains a large amount of hydrogen peroxide and, in contrast, the components (B1) and (B2) are combined to prevent the pH from being lowered. Therefore, the effect of improving the lightness of the hair by increasing the amount of hydrogen peroxide is obtained, and the tendency of the effect of improving the lightness of the hair by decreasing the pH does not appear. Moreover, since the component (B1) and the component (B2) are blended together, problems such as strong skin irritation and deterioration of touch due to the excessive blending of the component (B2) as described above can be avoided, and only the component (B1) The above-mentioned various problems due to a large amount of blending do not occur. Needless to say, since no persulfate is blended, there is no strong hair damage caused by this.

  In addition, about the point that the compounding quantity of (A) component is 3.5-6 mass% at the time of use, hydrogen peroxide as a precondition of this invention that the compounding quantity is less than 3.5 mass% at the time of use Since the increase in the amount is insufficient, the effect of the invention is insufficient. When the blending amount of the component (A) exceeds 6% by mass at the time of use, the amount of hydrogen peroxide is too excessive, which causes skin irritation.

  A particularly important point in the first invention is that when the component (A) is blended in a large amount as described above, the combined use of the component (B1) and the component (B2) results in a pH value α during use of the oxidant composition. Is adjusted to a pH range represented by α ≧ β. As a result, it was found that a remarkable effect of improving the lightness of the hair can be obtained. The inventor of the present application estimates the reason why such a remarkable effect is obtained as follows.

  That is, for example, when ammonia or an ammonium salt is used as the component (B2), ammonia is dissociated as shown in the following formula (1), and the dissociation constant (pKa) value β is 9.25.

NH ₃ + H ₂ O⇔NH ₄ ⁺ + OH ⁻ (1)
Therefore, as the pH value α during use of the oxidant composition becomes larger than the pKa value β of ammonia, the equilibrium state of the formula (1) is inclined to the left side, and there is a state in which more ammonia molecules exist than ammonium ions. Become. This “state in which a relatively large amount of ammonia molecules are present” is considered to contribute to the effect of improving hair brightness, and more specifically, the pH value α during use of the oxidant composition is expressed as α ≧ β. When it is in the pH range, that is, when the pH is 9.25 or more, a remarkable effect of improving hair brightness is obtained.

  When monoethanolamine, which is one of alkanolamines, is used as the component (B2), the monoethanolamine dissociates as shown in the following formula (2) (in the formula, the ethyl hydroxide group is represented by “R—”). The dissociation constant (pKa) value β is 9.5. Accordingly, when the pH value during use of the oxidizer composition is pH 9.5 or more, a remarkable effect of improving hair brightness can be obtained.

R—NH ₂ + H ₂ O⇔R—NH ₃ ⁺ + OH ⁻ (2)
The pH value α at the time of use of the oxidant composition is defined as described above. In practice, however, the pH value α is preferably pH 12 or less. The reason is from the practical problem of suppressing skin irritation rather than the problem of manifesting the effects of the present invention.

  In relation to the first invention, in Table 1 of Patent Document 2 below, an oxidative hair dye containing sodium metasilicate and ammonia in addition to hydrogen peroxide is disclosed. Next, in Table 1 of Patent Document 3 below, an oxidative hair dye containing sodium metasilicate and monoethanolamine in addition to hydrogen peroxide is disclosed. Furthermore, in Example 3 etc. of the following patent document 4, a powdery oxidative hair dye containing sodium metasilicate and ammonium sulfate in addition to the hydrogen peroxide adduct is disclosed.

JP 2005-523307 A JP 2004-26834 A As described above, there are several known documents disclosing oxidant compositions containing the component (A), the component (B1), and the component (B2) of the first invention. However, in any of these documents, the increase in the component (A) as in the first invention and the adjustment of the pH at the time of use of the oxidant composition by the component (B1) / (B2) based on this increase to the specific range We do not disclose such facts. Furthermore, it does not disclose or suggest the relationship between the above facts and the effect of improving hair brightness.

(Second invention)
The configuration of the second invention of the present application for solving the above problem is that the pH value α when the oxidant composition according to the first invention is used is in the pH range represented by α ≧ β + 0.5. It is a composition.

  When the pH value α during use of the oxidant composition is a value that is 0.5 or more (alkaline side) larger than the dissociation constant value β of the component (B2), that is, the above formula (1) or formula (2) When the equilibrium state of the hair is ensured to be tilted to the left side, a particularly remarkable effect of improving hair brightness can be obtained.

  “The pH value α during use of the oxidant composition is in the pH range represented by α ≧ β + 0.5” means that when the component (B2) is, for example, ammonia or an ammonium salt, the oxidant composition This means that the pH value α when used is 9.75 or more. When the component (B2) is monoethanolamine, for example, it means that the pH value α is 10.0 or more.

  Theoretically, if the pH value α is α = β, ammonia and alkanolamine ions and molecules are present at 50% each, but if α ≧ β + 0.5, ions: molecule = 10: 90. It becomes a ratio, and the brightness can be increased more efficiently.

(Third invention)
The configuration of the third invention of the present application for solving the above problem is an oxidizer composition in which the blending amount of the component (B1) according to the first invention or the second invention is as follows.
(B1) component: 1.5-9.0 mass% at the time of use.

  The blending amount of the component (B1) in the first invention can be appropriately designed as long as the pH value α during use of the oxidizing agent composition can be adjusted to the predetermined pH range. If the amount is too large, the pH will increase too much. By setting the blending amount of the component (B1) within the range specified in the third invention, the pH is set to 11 and skin irritation can be reduced.

(Fourth invention)
The configuration of the fourth invention of the present application for solving the above problem is an oxidizer composition in which the component (B1) according to any one of the first to third inventions is a silicate.

  As described above with respect to the first invention, it is sufficient that the component (B1) is essentially stronger than the component (B2), but silicate is particularly preferable. That is, since the agent containing a strong alkali has a high pH, for example, when it is used as a cream or emulsion, the emulsified state is not stable, and there are further problems such as holes in the packaging container. Therefore, the storage stability is improved by making the agent containing the strong alkali powder. From such a viewpoint, it is preferable to select a silicate as a strong alkali.

(Fifth invention)
The constitution of the fifth invention of the present application for solving the above-mentioned problems is that the ammonium salt as the component (B2) according to any one of the first invention to the fourth invention is ammonium sulfate, or the alkanolamine as the component (B2) is It is an oxidizing agent composition which is monoethanolamine.

  Although it does not limit as ammonium salt which is (B2) component, Ammonium sulfate can be illustrated preferably. Although it does not limit as alkanolamine which is (B2) component, Monoethanolamine can be illustrated preferably.

  The oxidant composition of the present invention is superior in hair by adjusting to a specific pH region with an alkaline agent, in combination with a large amount of hydrogen peroxide without causing hair damage as in the case of a persulfate. A lightness improving effect is obtained, and various problems due to excessive blending of hydrogen peroxide and an alkaline agent are not accompanied. In the case where the oxidant composition is an oxidative hair dye, its hair dyeing power and other various properties unique to oxidative hair dyes are maintained well.

  Next, modes for carrying out the present invention will be described including the best mode.

[Oxidizing agent composition]
The oxidant composition according to the present invention is formulated into a multiple agent formula (for example, a two-agent formula or a three-agent formula) mixed and prepared at the time of use, and at least the following (A) component, (B1) component, ( B2) component is contained, (A) component and other said each component are mix | blended in the different formulation. In the present invention, the “oxidant composition” refers to a composition essentially containing an oxidant, and is a concept including at least an oxidative hair dye and a hair bleaching agent. The oxidative hair dye further contains (C) component: oxidative dye intermediate.
(A) Component: 3.5-6 mass% hydrogen peroxide (B1) component: Strong alkali (B2) component: Ammonia, ammonium salt or alkanolamine in use In addition, (B1) component which is a strong alkali is a liquid agent. In the state, there is a risk of corroding the packaging container during storage, and in the liquid state, the same preparation as other components (for example, an oxidative dye intermediate in an oxidative hair dye or any other optional component in an oxidant composition) If blended in, it may cause unexpected reaction with other components during storage. Therefore, although not limited, the component (B1) is preferably a powder such as silicate. The component (B1) is preferably a preparation separated from other components at the time of storage, but when this is a powder, the component (B2) or the component (C) in the oxidative hair dye, It is also possible to mix | blend with the same formulation as another arbitrary additional component.

  Under the premise that the oxidizing agent composition contains hydrogen peroxide as component (A) so as to be 3.5 to 6% by mass at the time of use, (A) component preparation before mixing preparation (A It is more preferable that the component is contained at a relatively low concentration. More specifically, for example, in a multi-component oxidative hair dye blended in a preparation in which the component (B2) and the component (A) are different, the agent blended with the component (B2) and the component (A) were blended. The mixing ratio with the agent is more preferably within the range of 1: 1.4 to 1: 5. This makes the pH of the oxidant composition lower due to the component (A) at the time of mixing and preparation, and the effect of improving hair brightness becomes clearer. Furthermore, the safety in handling the preparation is also increased.

  Furthermore, the oxidizer composition according to the present invention has a pH value α during use adjusted to a pH range represented by α ≧ β, where β is the dissociation constant (pKa) value of the component (B2). ing. More preferably, it is adjusted to a pH range represented by α ≧ β + 0.5. However, the pH value α is preferably pH 12 or less.

  In addition to the point that the component (B1) is preferably a powder as described above, the oxidant composition according to the present invention, for example, the form of the oxidative hair dye or the hair bleaching agent, About the formulation after mixing, it can select arbitrarily from well-known various dosage forms according to a use, a use purpose, etc. Examples thereof include liquid, emulsion, cream, gel, paste, mist (spray type), aerosol foam and the like. A creamy oxidant composition can be particularly preferably exemplified.

[Main components of oxidizing agent composition]
(hydrogen peroxide)
The blending amount of hydrogen peroxide as the component (A) in the oxidant composition is 3.5 to 6% by mass at the time of use for the reason described above. More preferably, it can be 4-5 mass% at the time of use.

(Strong alkali)
The strong alkali as the component (B1) mainly means an inorganic alkali or an alkaline substance having an ionization degree of 90% or more. For example, caustic alkalis such as sodium hydroxide are included, but silicate can be mentioned as a particularly preferable component (B1). As the silicate, one or more of sodium silicate, sodium metasilicate, potassium silicate and the like can be arbitrarily selected and used.

  The blending amount of the component (B1) in the oxidant composition is not limited, but for the reasons described above, it is preferably 1.5 to 9.0% by mass at the time of use, and 3 to 6% by mass at the time of use. More preferred.

(Ammonia, ammonium salt, alkanolamine)
(B2) As the component ammonia or ammonium salt, one or more of ammonia, ammonium sulfate, ammonium carbonate, ammonium chloride and the like can be selected and used. Particularly preferred is ammonia or ammonium sulfate. Although the compounding quantity of ammonia or ammonium salt in an oxidizing agent composition is not limited, From the above-mentioned reason, it is preferable that it is 0.01-1.0 mol / L as ammonia at the time of use. More preferably, it is 0.1-0.30 mol / L at the time of use.

  As the component (B2) alkanolamine, one or more of monoethanolamine, diethanolamine, triethanolamine, monoisopropanolamine, diisopropanolamine, triisopropanolamine and the like can be selected and used. Monoethanolamine is particularly preferable. Although the compounding quantity of the alkanolamine in an oxidizing agent composition is not limited, From the reason mentioned above, it is preferable that it is 0.1-2.5 mass% at the time of use. More preferably, it is 0.1-2.0 mass% at the time of use.

  As the component (B2), at least one selected from ammonia, ammonium salts, and alkanolamines is blended. For example, when ammonia and monoethanolamine are used in combination, ammonia molecules increase even when the pH at the time of use is 9.25 or more, and good results are obtained. However, when the pH at the time of use is 9.5 or more, the monoethanolamine molecule More favorable results can be obtained.

(Oxidized dye intermediate)
When the oxidant composition of the present invention is an oxidative hair dye, it is necessary to add an oxidative dye intermediate. This oxidative dye intermediate consists of a main intermediate, or consists of a main intermediate and a coupler. The types of main intermediates and couplers are not limited.

  Examples of the main intermediate include ortho- or para-phenylenediamines and aminophenols, and more specifically, p-phenylenediamine, toluene-2,5-diamine, N-phenyl-p-phenylene. Examples include diamine, 4,4′-diaminodiphenylamine, p-aminophenol, o-aminophenol, p-methylaminophenol, o-chloro-p-phenylenediamine, and 2,4-diaminophenol.

  Examples of couplers include meta-diamines, aminophenols or diphenols, and more specifically, resorcin, catechol, pyrogallol, phloroglucin, gallic acid, hydroquinone, 5-amino-o-cresol, m -Aminophenol, 5- (2-hydroxyethylamino) -2-methylphenol, m-phenylenediamine, 2,4-diaminophenoxyethanol, toluene-3,4-diamine, α-naphthol, 2,6-diaminopyridine, Examples include diphenylamine, 3,3′-iminodiphenyl, 1,5-dihydroxynaphthalene and tannic acid.

  What is necessary is just to set the compounding quantity of the oxidation dye intermediate body in an oxidation hair dye suitably, For example, it can be 0.01-3 mass% at the time of use.

[Other components of oxidizing agent composition]
In the oxidizer composition, if necessary, oily components, surfactants, polymer substances, vitamins, antioxidants such as sodium sulfite, chelating agents such as EDTA, dispersions such as magnesium stearate and sodium stannate Agents, excipients such as potato starch, fragrances, bactericides / preservatives, anti-inflammatory agents, ultraviolet absorbers, propellants, thickeners and the like can be optionally blended. Some of these components are described in detail below.

(Oil component)
Examples of the oil component include hydrocarbons, polyhydric alcohols, fats and oils, silicones, higher alcohols, higher fatty acids, alkyl glyceryl ethers, esters, and the like.

  Examples of the hydrocarbon include paraffin, polyethylene powder, microcrystalline wax, petrolatum and the like.

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

  Examples of oils and fats include various vegetable oils and animal oils.

  Examples of silicones include methylpolysiloxane, dimethylpolysiloxane, methylphenylpolysiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, polyether-modified silicone, highly-polymerized silicone having an average polymerization degree of 650 to 10,000, and betaine-modified silicone. And alkyl-modified silicone, alkoxy-modified silicone, mercapto-modified silicone, carboxy-modified silicone, fluorine-modified silicone and the like.

  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.

  Examples of the alkyl glyceryl ether include batyl alcohol (monostearyl glyceryl ether), chimyl alcohol (monocetyl glyceryl ether), selachyl alcohol (monooleyl glyceryl ether), and isostearyl glyceryl ether.

  Esters include glycerin-based vegetable oils such as soybean oil, olive oil, hydrogenated castor oil, polyhydric alcohol fatty acid esters such as pentaerythritol fatty acid ester, diisopropyl adipate, diisobutyl adipate, dioctyl adipate, adipic acid 2-hexyldecyl, diisostearyl adipate, isopropyl myristate, cetyl octanoate, cetyl isooctanoate, isononyl isononanoate, isodecyl isononanoate, isotridecyl isononanoate, diisopropyl sebacate, octyldodecyl myristate, isopropyl palmitate, stearin Butyl acid, stearyl stearate, hexyl laurate, myristyl myristate, decyl oleate, hexyl decyl dimethyloctanoate, and myristic acid Isodecyl, isostearyl myristate, hexyl, and the like include the palmitate 2-ethyl.

(Surfactant)
Examples of the surfactant include a cationic surfactant, a nonionic surfactant, an anionic surfactant, and an amphoteric surfactant.

  Cationic surfactants include lauryltrimethylammonium chloride, cetyltrimethylammonium chloride, stearyltrimethylammonium chloride, distearyldimethylammonium chloride, behenyltrimethylammonium sulfate, tri (polyoxyethylene) stearylammonium chloride, quaternium-91 (INCI). Name), behenyltrimethylammonium chloride, distearyldimethylammonium chloride, ethyl lanolin sulfate fatty acid amidopropylethyldimethylammonium, cetyltrimethylammonium bromide and the like.

  Nonionic surfactants include polyoxyethylene (hereinafter referred to as POE) (20E.O.) POE alkyl ethers such as oleyl ether, POE alkylphenyl ethers, POE / polyoxypropylene alkyl ethers, and POE sorbitan. Examples include fatty acid esters, POE propylene glycol fatty acid esters, and fatty acid alkanolamides.

  Anionic surfactants include alkyl sulfates such as sodium lauryl sulfate, POE alkyl sulfates such as POE lauryl ether sodium sulfate, alkyl sulfate esters such as lauryl sulfate triethanolamine, stearoylmethyl taurine sodium, dodecylbenzene sulfonic acid Examples include triethanolamine, sodium tetradecenesulfonate, 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.

(Polymer substance)
Examples of the polymer substance include cationic polymers, anionic polymers such as carboxyvinyl polymer and carboxymethyl cellulose, amphoteric polymers such as diallyl quaternary ammonium salt / acrylic acid copolymer, and various water-soluble polymers.

  Examples of the cationic polymer include cationized cellulose derivatives such as hydroxyethylcellulose dimethyldiallylammonium chloride, cationized guar gum, diallyl quaternary ammonium salt / acrylamide copolymer, polydimethylmethylenepiperidinium chloride, and the like.

  Examples of water-soluble polymers include vegetable polymers such as gum arabic, xanthan gum, carrageenan, pectin, agar, and starch, microbial polymers such as dextran and pullulan, animal polymers such as collagen, casein, and gelatin, methylcellulose, hydroxyethylcellulose, and the like. Cellulosic polymers are exemplified.

Examples of the present invention will be described below together with comparative examples. The technical scope of the present invention is not limited by the following examples and comparative examples.
[First Example Group: Oxidative hair dye]
Before explaining each example and comparative example according to the first example group, how to read Tables 1 to 6 at the end showing these examples will be explained. In each table, the composition of the first agent and the second agent or the first agent to the third agent constituting the oxidative hair dye is described. In the column of each agent, the dosage form is “cream”, “ It is appended as "powder".

  In each agent constituting the oxidative hair dye, the unit of the numerical value indicating the blending amount of each component is “mass%” in principle. However, the third agent shown in Tables 4 to 6 is composed of a single powder component (sodium metasilicate), and the numerical value indicating the blending amount of sodium metasilicate in these third agents is “part by mass”. The specific meaning of the mass part notation is explained in relation to the following “mixing ratio”.

In Tables 1 to 6, when the notation of the “1 agent: 2 agent mixing ratio” column is “1: 5”, for example, “1 agent and 2 agents are mixed at a mass ratio of 1: 5 when used. "Means. When the oxidative hair dye is accompanied by the third agent represented by the above-mentioned “parts by mass”, it is mixed at the following mass ratio at the time of use. That is, in Example 17, mixing is performed at a ratio of “3.9 g of 3 agents to 20 g of 1 agent and 100 g of 2 agents (mixing ratio 1: 5)”. In each of Examples and Comparative Examples corresponding to Tables 5 and 6, mixing is performed at a ratio of “1 agent 20 g, 2 agents 100 g (mixing ratio 1: 5), 3 agents in grams shown in the table”. .
[First Example Group 1: (B2) Component is Ammonium Salt]
Example 1 to Example 5 and Comparative Example 1 to Comparative Example 2 shown in Table 1 at the end, Example 6 to Example 10 and Comparative Example 3 shown in Table 2, Example 11 to Example 15 shown in Table 3 and According to the conventional method, the first agent and the second agent of the oxidative hair dye, or the first agent to the third agent of the compositions according to Comparative Example 4 and Examples 16 to 17 and Comparative Example 5 shown in Table 4, respectively. Prepared.

  Furthermore, on the premise of the above-mentioned mixing ratio of each of these agents, “pH when used”, “mass% when using strong alkali”, and “equivalent amount when using ammonia (mol / l)” in the oxidative hair dye of each example And “mass% when using hydrogen peroxide” are also shown in the table.

  When using the first agent and the second agent or the first agent to the third agent of the oxidative hair dye according to Examples 1 to 17 and Comparative Examples 1 to 5, respectively, at the above-described mixing ratios. The mixture was prepared to obtain an oxidative hair dye composition according to each example. The oxidative hair dye composition according to each of these examples was applied to a black hair bundle (sample hair bundle) using a comb, left at room temperature for 20 minutes, and then attached to the hair bundle. The agent composition was washed away with water and dried.

In such oxidative hair dyeing treatment, “lightness”, “irritating odor”, and “skin irritation” were evaluated as follows. These evaluation results are shown in the table.
<Lightness evaluation method>
The lightness was evaluated by visually observing the hair bundle treated with the oxidative hair dye composition of each Example and Comparative Example. The lightness evaluation criteria are “1” points when the lightness is very bad, “2” points when the lightness is bad, “3” points when the lightness is good, and “4” when the lightness is better. A point where the brightness was very good was designated as a “5” point.
<Evaluation method of pungent odor>
When the oxidative hair dye composition of each Example and Comparative Example was applied to the hair bundle in the above treatment, the odor was smelled and the degree of irritating odor was evaluated. The evaluation criteria for the irritating odor are “1” point when the irritating odor is very strong, “2” point when the irritating odor is strong, “3” point when the irritating odor is less, 4 ”point, and“ 5 ”point when the irritating odor is very small.
<Evaluation method of skin irritation>
When the oxidative hair dye composition of each Example and Comparative Example was applied to the hair bundle in the above treatment, the degree of irritation to the scalp was evaluated. Evaluation criteria for skin irritation are “1” points when skin irritation is very strong, “2” points when skin irritation is strong, “3” points when skin irritation is low, and “3” points when skin irritation is less. 4 ”points, and“ 5 ”points when skin irritation is very small.
[First example group 2: (B2) component is alkanolamine]
The first agent of the oxidative hair dye having the composition according to Examples 18 to 20 and Comparative Examples 6 to 7 shown in Table 5 at the end and Examples 21 to 26 and Comparative Example 8 shown in Table 6 And the 2nd agent or the 1st agent-the 3rd agent were prepared according to the usual method, respectively.

  Furthermore, on the premise of the mixing ratio of each of these agents, “use pH”, “mass% when using strong alkali”, “mass% when using alkanolamine”, “ The "mass% when using hydrogen oxide" is also shown in the table.

  When using the first agent and the second agent, or the first agent to the third agent of the oxidative hair dye according to Examples 18 to 26 and Comparative Examples 6 to 8, respectively, at the above-described mixing ratios. The mixture was prepared to obtain an oxidative hair dye composition according to each example. The oxidative hair dye composition according to each of these examples was applied to a black hair bundle (sample hair bundle) using a comb, left at room temperature for 20 minutes, and then attached to the hair bundle. The agent composition was washed away with water and dried.

In such oxidative hair dyeing treatment, “lightness” was evaluated in the same manner as in “first example group 1”, and “feel” was evaluated as follows. These evaluation results are shown in the table.
<Evaluation method of touch>
The hair bundle treated with the oxidative hair dye composition of each Example and Comparative Example was directly touched to evaluate the touch. Evaluation criteria for feel are “1” points when the feel is very bad, “2” points when the feel is bad, “3” points when the feel is good, and “4” points when the feel is better When the feel was very good, the score was “5”. When the touch evaluation was “1” or “2”, when the hair of the hair bundle sample was observed with an electron microscope, there was little lift of the cuticle.
[Second Example Group: Hair Depigmenting Agent]
Compared with the oxidative hair dyes according to Examples 1 to 26 and Comparative Examples 1 to 8 according to "1 of the first example group" and "2 of the first example group" A hair bleaching agent that differs only in the point from which the body was removed was prepared and applied to the sample hair bundle by the same method as in the first example group. ”,“ Irritating odor ”,“ skin irritation ”, and“ feel ”were evaluated.

These evaluation results are omitted in order to avoid complications, but in any of the examples and comparative examples, in “first example group 1” and “first example group 2” It was equivalent to a corresponding Example and a comparative example.
[Reference Comparative Example: Oxidizing agent composition using persulfate]
A hair bleaching agent according to a reference comparative example, in which the first agent having the composition shown below as “one agent (powder) of the reference comparative example” and the second agent of the above-described example 1 are mixed at a mass mixing ratio of 1: 5. Was prepared.
(1 agent for reference comparative example (powder))
Potassium persulfate 45% by mass
Ammonium persulfate 20% by mass
Sodium metasilicate 9.0% by mass
EDTA 6.0% by mass
Hydroxyethyl cellulose dimethyl diallylammonium chloride 1.0% by mass
Magnesium stearate 0.5% by mass
Potato starch balance 100% by mass
About this reference comparative example, it was applied to the sample hair bundle by the same method as in the case of the first example group, and “lightness” and “feel” were evaluated in the same manner as in the case of the first example group. The evaluation of lightness was “5” or above, while the evaluation of touch was “1”. And when the hair of the hair | bristle bundle sample which concerns on this reference comparative example was used for observation with an electron microscope, the remarkable lift of the cuticle was recognized.

  By blending a large amount of hydrogen peroxide according to the present invention, an excellent effect of improving hair brightness can be obtained by adjusting to a specific pH range with an alkali agent, and various effects based on excessive blending of hydrogen peroxide and an alkali agent can be obtained. There is provided an oxidant composition that does not involve the above-mentioned problems.

Claims (5)

It is formulated into a multi-drug formulation that is mixed and prepared at the time of use, and contains at least the following (A) component, (B1) component, and (B2) component, and the (A) component and the other components described above are different formulations It is an oxidizer composition to be blended, and the pH value α at the time of use is in a pH range represented by α ≧ β when the dissociation constant (pKa) value of the component (B2) is β. An oxidizing agent composition.
(A) component: 3.5-6 mass% hydrogen peroxide (B1) component at the time of use: Strong alkali (B2) component: At least 1 sort (s) chosen from ammonia, ammonium salt, or alkanolamine 2. The oxidant composition according to claim 1, wherein a pH value α at the time of use of the oxidant composition is in a pH range represented by α ≧ β + 0.5. The compounding quantity of the said (B1) component is as follows, The oxidizing agent composition of Claim 1 or Claim 2 characterized by the above-mentioned.
(B1) component: 1.5-9.0 mass% at the time of use. The said (B1) component is a silicate, The oxidizing agent composition in any one of Claims 1-3 characterized by the above-mentioned. The oxidant composition according to any one of claims 1 to 4, wherein the ammonium salt as the component (B2) is ammonium sulfate, or the alkanolamine as the component (B2) is monoethanolamine. .