WO2018030467A1 - Oxidant-containing composition - Google Patents

Abstract

[Problem] In oxidative hair dyes, there is a tendency that the number of kinds of a first preparation is increasing in order to meet a growing need to highly control the color of hair and, consequently, the number of kinds of a first preparation for already dyed parts of hair is also increasing. As a result, such a problem arises that the consumed amount of a first preparation for each color decreases and the quality of the first preparation is deteriorated during a period after a package of the first preparation is opened and before the first preparation is gone through. In these situations, the present invention addresses the problem of preventing the increase in the number of kinds of a first preparation for already dyed parts of hair. [Solution] In order to solve the problem, an oxidant-containing composition that can be used as a second preparation of a hart treating agent is provided. The oxidant-containing composition is characterized by comprising (A) and acid and (B) an oxidant, wherein the acid (A) is contained in an amount of 0.4% by mass or more. According to the oxidant-containing composition, it is possible to prevent the accumulation of damage to hair even when a first preparation for newly grown parts of hair is used. Therefore, it becomes possible to also use the first preparation for newly grown parts of hair as a first preparation for already dyed parts of hair, resulting in the reduction in the number of kinds of the first preparation.

Description

Oxidizing agent-containing composition

The present invention relates to an oxidant-containing composition used as a second agent of a hair treatment agent such as an oxidative hair dye or a hair decoloring / decoloring agent. More specifically, the present invention relates to an oxidant-containing composition used as a second agent of a hair treatment agent that is suitably used for damaged hair such as already-dyed portions of hair.

Hair treatment agents such as oxidative hair dyes, hair bleaching agents and hair depigmenting agents are generally composed of a first agent containing an alkaline agent and a second agent containing an oxidizing agent. For example, in an oxidative hair dye, an oxidative dye for adjusting the color tone of hair is blended with a first agent containing an alkaline agent, and when mixed with a second agent containing an oxidant, the oxidative dye is oxidized. Color develops.

In beauty salons, etc., dozens of kinds of first agents are prepared according to color variations, and the first agent is selected according to the color tone desired by the customer. On the other hand, in the 2nd agent containing an oxidizing agent, since a common thing is used regardless of the kind of color tone, it is not necessary to prepare many kinds.

In addition, in hair dyeing with an oxidative hair dye, a hair dye having a different pH is used for hair that contains a previously dyed part that has been dyed in the past and a new part that has newly grown after the hair dyeing process. The hair dyeing process of applying is known. Repeated hair dyeing with a strong alkaline hair dye makes the hair more susceptible to damage. For hair dyes applied to already-dyed areas, the amount of the alkaline agent is reduced to reduce damage to the existing dyed areas. is doing.

For example, in Patent Document 1, an alkaline oxidative hair dye composition having a pH of 9.5 to 11.0 in use is applied to a new part, and the pH in use is applied to an already dyed part. A hair dyeing method of applying 7.5 to 9.4 slightly alkaline oxidative hair dye composition is disclosed. In this hair dyeing method, the first agent in which the amount of the alkali agent is reduced is used in the slightly alkaline oxidative hair dye composition.

JP 2002-241248 A

The type of the first agent is increasing due to increasing needs for highly adjusting the color tone, and accordingly, the type of the first agent for pre-stained parts tends to increase. For this reason, the consumption of each color tone is reduced, and there is a problem that the quality deteriorates after opening and before using up.
Then, the subject of this invention is reducing the kind of 1st agent for pre-dyed parts.

As a result of intensive studies on the above problems, the inventor changed the conventional idea of preparing a first agent for a pre-dyed part with a reduced content of an alkaline agent, and a second agent with an increased acid content. Has led to the idea of a new mode of suppressing the accumulation of damage to the hair. According to this aspect, since the conventional 1st agent for new parts can be used in the hair dyeing process etc. of an already dyed part, the kind of 1st agent can be reduced.

Moreover, when the 2nd agent which reduced pH was prepared, there existed a subject that accumulation of damage to hair could not fully be suppressed only by reducing pH. As a result of further studies, it was found that the accumulation of damage to the hair can be sufficiently reduced by setting the acid content of the second agent to 0.4 mass% or more, and the present invention has been completed.
That is, the present invention is the following oxidizing agent-containing composition and hair treatment method.

The oxidant-containing composition of the present invention for solving the above problems is an oxidant-containing composition used as a second agent of a hair treatment agent, and contains (A) an acid and (B) an oxidant. The (A) acid is contained in an amount of 0.4% by mass or more.
By using this oxidizing agent-containing composition as the second agent of the hair treatment agent, damage to the hair can be sufficiently suppressed. Thereby, since the 1st agent for newborn parts can be utilized as an object for already dyed parts, it becomes possible to reduce the kind of 1st agent.
Furthermore, since the first agent for the new part having various color variations can be used for the hair treatment agent for the already dyed part, the color variation of the hair treatment agent for the already dyed part can be diversified. There is also an effect.

Furthermore, according to one embodiment of the oxidizing agent-containing composition of the present invention, (C) 0.1 to 1.5% by mass of a cationic surfactant is contained.
(A) When the acid content is increased, another problem that the emulsification stability is lowered occurs. However, the deterioration of the emulsion stability can be suppressed by containing (C) a cationic surfactant. Further, by containing 0.1 to 1.5% by mass of (C) the cationic surfactant, the emulsion stability and coating operability can be improved in a balanced manner. Furthermore, by setting the content of the (C) cationic surfactant to 0.1 to 1.5% by mass, the effect of improving hair feel and fading resistance is also exhibited.

Furthermore, according to one embodiment of the oxidizing agent-containing composition of the present invention, the (A) acid has a feature that it contains a trivalent or higher acid.
According to this feature, more excellent effects are exhibited in hair feel, fading resistance, emulsion stability and coating operability.
In addition, when the acid is contained, the color tone is changed, so that the color connection between the already-dyed portion and the newly-formed portion is deteriorated. However, since the change in color tone can be suppressed by using a trivalent or higher acid, the same first agent can be used for the pre-stained part and the new part.

Furthermore, according to one embodiment of the oxidizing agent-containing composition of the present invention, the oxidizing agent-containing composition is characterized in that it is for a pre-dyed part.
According to this feature, the effect of the present invention can be exhibited more.

The hair treatment method of the present invention for solving the above-mentioned problem is a hair treatment for a dyed part by mixing the first agent used in the new part and the second agent comprising the oxidizing agent-containing composition of the present invention. A step of preparing an agent, and a step of applying the hair treatment agent to a pre-dyed portion of the hair.
According to this hair treatment method, since the hair treatment agent for the already-dyed part can be prepared using the first agent for the new part, it is various even without preparing the first agent for the already-dyed part. Can cope with various color variations. Moreover, the hair processing method which suppressed accumulation | storage of the damage of a pre-dyed part can be provided.

According to the present invention, accumulation of damage to hair can be sufficiently suppressed. Therefore, since the first agent for the new part can be used for the already-dyed part, the types of the first agent can be reduced.
Furthermore, according to the present invention, since the first agent for the new part having various color variations can be used as the first agent for the already dyed part, the color of the hair treatment agent for the already dyed part There is also an effect that variations can be diversified.

Next, the best mode for carrying out the present invention will be described.
The oxidizing agent-containing composition of the present invention is an oxidizing agent-containing composition used as a second agent for a hair treatment agent, which contains (A) an acid and (B) an oxidizing agent. It contains 0.4 mass% or more.

[Hair treatment agent]
The hair treatment agent in the present invention is an oxidative hair dye, a hair bleaching agent or a hair depigmenting agent, comprising the first agent containing an alkaline agent and the oxidizing agent-containing composition of the present invention as the second agent. Is. In addition, the hair treatment agent may be a two-agent type consisting of the first agent and the second agent, or a multi-agent type consisting of three or more agents.

The oxidative hair dye mixes a first agent containing an alkaline agent and an oxidative dye and a second agent containing an oxidant, and colors the oxidative dye with the oxidant to dye the hair. Alkaline agents have the effect of swelling the hair and promoting the penetration of dyes and oxidants, and the oxidant has the effect of decomposing melanin inside the hair in addition to the action of oxidizing the oxidative dyes. Yes.

The hair depigmenting agent and the hair depigmenting agent are those that do not contain an oxidation dye in the first agent and depigment the hair. A hair bleaching agent decolorizes hair by oxidizing and decomposing melanin in the hair, and a hair decoloring agent decolorizes dye and melanin from hair that has been dyed.

The pH of the hair treatment agent in the present invention is preferably 9.7 or less, more preferably 9.5 or less, and still more preferably 9.3 or less.
According to the hair treatment agent of the present invention, it is possible to suppress the accumulation of damage to the hair, and therefore it is preferable to use it for already-dyed parts and damaged hair.

The hair treatment agent may take any form, and examples thereof include liquids, emulsions, creams and gels. In the case of containing an oil component, the O / W type, W / O type, W / O / W type and the like are not particularly limited, but may be an O / W type emulsion, cream or gel. preferable. Furthermore, it is good also as foam form or mist form at the time of use. In the case of foaming, an aerosol former container or a non-aerosol foamer container may be used.

[About oxidizing agent-containing composition]
The oxidizing agent containing composition of this invention is utilized as a 2nd agent of a hair treatment agent. By using the oxidant-containing composition of the present invention as the second agent, even when the first agent having a large amount of alkaline agent such as the first agent for the new part is used, the hair is damaged. Can be suppressed.

The oxidizing agent-containing composition of the present invention may be used for any application such as a new part, a pre-stained part, or damaged hair. In view of the effect that damage to hair is reduced, the oxidizing agent-containing composition of the present invention can be suitably used for pre-dyed parts and damaged hair. Particularly preferably, it is for a pre-dyed portion.

The form of the oxidizing agent-containing composition of the present invention may be any form, and examples thereof include liquids, emulsions, creams and gels. In the case of containing an oil component, the O / W type, W / O type, W / O / W type and the like are not particularly limited, but may be an O / W type emulsion, cream or gel. preferable. Furthermore, it is good also as foam form or mist form at the time of use. In the case of foaming, an aerosol former container or a non-aerosol foamer container may be used.

Next, each component mix | blended with the oxidizing agent containing composition of this invention is explained in full detail.
In addition, about content of each component, unless otherwise indicated, it is content in an oxidizing agent containing composition.
In the present specification, POE represents a polyoxyethylene chain, POP represents a polyoxypropylene chain, and the numbers in parentheses following this indicate the number of moles added. The number in parentheses following the alkyl indicates the number of carbon atoms in the fatty acid chain.

<(A) Acid>
The acid exhibits an effect of neutralizing the alkaline agent of the first agent, for example, phosphoric acids such as phosphoric acid and pyrophosphoric acid, inorganic acids such as hydrochloric acid, sulfuric acid and nitric acid, citric acid, acetic acid, tartaric acid, lactic acid Organic acids such as malic acid, glycolic acid, levulinic acid, gluconic acid, aspartic acid, glutamic acid, hydroxyethanediphosphonic acid and ascorbic acid. Preferred are acids having a valence of 3 or more, such as phosphoric acids and citric acid, more preferred are phosphoric acids, and particularly preferred is phosphoric acid.
By containing a trivalent or higher acid, hair feel, fading resistance, emulsion stability, and coating operability can be improved. Furthermore, there is an effect that a change in color tone due to the addition of acid is suppressed.

The content of acid in the oxidizing agent-containing composition of the present invention is 0.4% by mass or more. As a lower limit, More preferably, it is 0.5 mass%, More preferably, it is 1.0 mass%, Most preferably, it is 1.2 mass% or more. By setting the acid content to 0.4% by mass or more, even when the first agent for the new part is used as the first agent of the hair treatment agent, it is possible to sufficiently suppress the accumulation of damage to the hair. it can. Therefore, it becomes possible to use the first agent for the new part for the pre-stained part, and the types of the first agent can be reduced.

The upper limit of the acid content is not particularly limited, but is preferably 5.0% by mass or less, more preferably 3.0% by mass, still more preferably 2.5% by mass, Preferably it is 2.0 weight%, More preferably, it is 1.5 mass%. By setting it as 5.0 mass% or less, the performance as hair treatment agents, such as emulsification stability of an oxidizing agent containing composition, hair dyeing power, and coating operativity, can be improved.

In addition, although the oxidizing agent containing composition of this invention does not prevent the addition of an alkali agent, it is preferable not to contain an alkali agent. In the case of containing an alkaline agent, the content of the acid may be a content after removing the amount of acid corresponding to the amount of the base of the alkaline agent.

The pH of the oxidizing agent-containing composition of the present invention is not particularly limited, but is preferably pH 1 to 4, more preferably pH 1 to 3, still more preferably pH 1 to 2.5, particularly preferably pH 1 to 4. 2. In addition, since a clear correlation is not recognized between acid content and pH, the effect of this invention can be exhibited more by adjusting acid content.

<(B) Oxidizing agent>
The oxidizing agent has an action of oxidizing the oxidative dye to develop a color and an action of decomposing melanin inside the hair. Specific examples include hydrogen peroxide, urea peroxide, melamine peroxide, sodium percarbonate, potassium percarbonate, sodium perborate, potassium perborate, ammonium persulfate, potassium persulfate, and sodium persulfate. Of sulfate, sodium peroxide, potassium peroxide, magnesium peroxide, barium peroxide, calcium peroxide, strontium peroxide, sulfate hydrogen peroxide adduct, phosphate hydrogen peroxide adduct, pyrophosphate Examples include hydrogen peroxide adduct, peracetic acid and its salt, performic acid and its salt, permanganate, bromate and the like. Among these, hydrogen peroxide is preferable. Further, persulfates such as ammonium persulfate, potassium persulfate and sodium persulfate may be contained as an oxidation aid.

The content of the oxidizing agent in the oxidizing agent-containing composition of the present invention is not particularly limited, but is preferably 0.01 to 10% by mass. As a lower limit, More preferably, it is 0.1 mass% or more, Most preferably, it is 1 mass% or more. As an upper limit, More preferably, it is 5 mass% or less, Most preferably, it is 3 mass% or less.
When the content of the oxidizing agent is reduced, damage to the hair can be further reduced.

When hydrogen peroxide is contained as an oxidizing agent, it is preferable to blend ethylene glycol phenyl ether (phenoxyethanol), hydroxyethanediphosphonic acid, or a salt thereof as a stabilizer for improving the stability.

<(C) Cationic surfactant>
A cationic surfactant is a surfactant in which a hydrophilic group that dissolves in water and ionically dissociates becomes a cation.
For example, monoalkyl type quaternary ammonium salts, dialkyl type quaternary ammonium salts, trialkyl type quaternary ammonium salts, benzalkonium type quaternary ammonium salts, alkyl quaternary ammonium salts such as monoalkyl ether type quaternary ammonium salts, Examples include alkylamine salts, fatty acid amidoamine salts, amine salts such as ester-containing tertiary amine salts, archebel type tertiary amine salts, cyclic quaternary ammonium salts such as alkylpyridinium salts and alkylisoquinolinium salts, and benzethonium chloride. .

Preferred are alkyl quaternary ammonium salts, more preferred are monoalkyl quaternary ammonium salts and dialkyl quaternary ammonium salts, and particularly preferred are monoalkyl quaternary ammonium salts.

Examples of monoalkyl type quaternary ammonium salts include lauryl trimethyl ammonium chloride, lauryl trimethyl ammonium bromide, alkyl (16,18) trimethyl ammonium chloride, cetyl trimethyl ammonium chloride, cetyl trimethyl ammonium bromide, cetyl trimethyl ammonium saccharin, chloride Stearyltrimethylammonium, stearyltrimethylammonium bromide, behenyltrimethylammonium chloride, stearyltrimethylammonium saccharin, alkyl chloride (28) trimethylammonium chloride, diPOE (2) oleylmethylammonium chloride, diPOE stearylmethylammonium chloride, POE (1) POP (25) diethylmethylammonium chloride, POP methyldiethylammonium chloride, Of methacryloyloxyethyl trimethyl ammonium, and the like methylsulfate behenyl trimethyl ammonium. Particularly preferred are stearyltrimethylammonium chloride, alkyl (16,18) trimethylammonium chloride, and cetyltrimethylammonium chloride.

Examples of dialkyl quaternary ammonium salts include dialkyl chloride (12-15) dimethyl ammonium, dialkyl chloride (12-18) dimethyl ammonium, dialkyl chloride (14-18) dimethyl ammonium, dicocoyl dimethyl ammonium chloride, dicetyl chloride. Examples include dimethyl ammonium, distearyl dimethyl ammonium chloride, and isostearyl lauryl dimethyl ammonium chloride.

The oxidant-containing composition of the present invention contains (A) 0.4% by mass or more of the acid, whereby the effects of the present invention such as improvement of hair feel and fading resistance can be obtained, while emulsion stability is improved. A phenomenon of reduction is observed. However, by containing (C) a cationic surfactant, the emulsion stability is improved, and (A) the problem caused by the addition of an acid can be solved.
Furthermore, by containing (C) cationic surfactant, the effect of improving the touch of hair is also recognized, and it can be said that it acts synergistically with (A) acid in the said effect.

The content of the (C) cationic surfactant in the oxidizing agent-containing composition is not particularly limited, but is preferably 0.001 to 10% by mass. As a lower limit, More preferably, it is 0.01 mass% or more, More preferably, it is 0.05 mass% or more, Most preferably, it is 0.5 mass% or more. As an upper limit, More preferably, it is 5 mass% or less, More preferably, it is 3 mass% or less, Most preferably, it is 1.5 mass% or less. By making the content of the cationic surfactant 0.001% by mass or more, emulsification stability and hair feel can be improved. On the other hand, when the content of the cationic surfactant is 10% by mass or less, the coating operability and the fading resistance can be improved.

The content ratio (A / C) of (A) acid and (C) cationic surfactant is not particularly limited, but is preferably 0.5 to 30. The lower limit is more preferably 1.5 or more, and particularly preferably 3 or more. As an upper limit, More preferably, it is 20 or less, Most preferably, it is 10 or less. By setting it within this range, the (A) acid and the (C) cationic surfactant act in a well-balanced manner, and excellent effects in hair feel, fading resistance, emulsion stability, and coating operability are recognized.

<Nonionic surfactant>
Nonionic surfactants include, for example, POE alkyl ethers, POE lanolin / lanolin alcohol derivatives, POE sterol / hydrogenated sterols, POE alkylphenyl ethers, POE / POP alkyl ethers, POE sorbitan fatty acid esters, POE monofatty acid esters, POE glycerin fatty acid esters, polyglycerin fatty acid esters, monoglycerin fatty acid esters, sorbitan fatty acid esters, sucrose fatty acid esters, alkylpolyglucosides and the like can be mentioned. POE alkyl ethers, POE lanolin / lanolin alcohol derivatives, and POE sterol / hydrogenated sterols are preferable.

The total content of the nonionic surfactant in the oxidizing agent-containing composition is not particularly limited, but is preferably 0.001 to 40% by mass. As a lower limit, More preferably, it is 0.01 mass% or more, Most preferably, it is 0.05 mass% or more. As an upper limit, More preferably, it is 30 mass% or less, Most preferably, it is 20 mass% or less. By containing a nonionic surfactant, the emulsion stability is improved.

((D) POE alkyl ethers)
The oxidizing agent-containing composition of the present invention preferably contains POE alkyl ethers from the viewpoint of improving emulsion stability and coating operability.
POE alkyl ethers include, for example, POE (2) alkyl (12-15) ether (HLB value 9.0), POE (3) alkyl (12-14) ether (HLB value 8.0), POE (4 ) Alkyl (12-15) ether (HLB value 10.5), POE (10) alkyl (12-15) ether (HLB value 15.5), POE (2) lauryl ether (HLB value 9.5), POE (4.2) Lauryl ether (HLB value 11.5), POE (9) lauryl ether (HLB value 14.5), POE (21) lauryl ether (HLB value 19.0), POE (25) lauryl ether ( HLB value 19.5), POE (2) cetyl ether (HLB value 8.0), POE (5.5) cetyl ether (HLB value 10.5), POE (7) cetyl Ether (HLB value 11.5), POE (10) cetyl ether (HLB value 13.5), POE (15) cetyl ether (HLB value 15.5), POE (20) cetyl ether (HLB value 17.0) , POE (23) cetyl ether (HLB value 18.0), POE (25) cetyl ether (HLB value 18.5), POE (30) cetyl ether (HLB value 19.5), POE (40) cetyl ether ( HLB value 20.0), POE (2) stearyl ether (HLB value 8.0), POE (4) stearyl ether (HLB value 9.0), POE (20) stearyl ether (HLB value 18.0), POE (21) Stearyl ether (HLB value 18.0), POE (150) stearyl ether (HLB value 19.2), POE (2) oleyl Tel (HLB value 7.5), POE (7) oleyl ether (HLB value 10.5), POE (10) oleyl ether (HLB value 14.5), POE (15) oleyl ether (HLB value 16.0) POE (20) oleyl ether (HLB value 17.0), POE (50) oleyl ether (HLB value 18.0), POE (5) behenyl ether (HLB value 7.0), POE (10) behenyl ether ( HLB value 10.0), POE (20) behenyl ether (HLB value 16.5), POE (30) behenyl ether (HLB value 18.0), POE (5) secondary alkyl ether (HLB value 10.5) POE (7) secondary alkyl ether (HLB value 12.0), POE (9) alkyl ether (HLB value 13.5), POE (12) alkyl Ruether (HLB value 14.5) and the like.

(D) The number of moles of POE chain added to POE alkyl ethers is not particularly limited, but is preferably 2 to 100, more preferably 2 to 80, and particularly preferably 2 to 60. By making it in this range, the effect of improving the emulsion stability and coating operability is more exhibited.

(D) The HLB of the POE alkyl ethers is not particularly limited, but is preferably 2 to 19.5. The lower limit is more preferably 4 or more, and particularly preferably 6 or more. As an upper limit, More preferably, it is 18 or less, Most preferably, it is 16 or less. By making it in this range, the effect of improving the emulsion stability and coating operability is more exhibited.
The measurement of HLB is based on the actual measurement of the HLB value by the “20.3.1 emulsion method” described in “Handbook-Cosmetics / Formulation raw materials-Revised edition (issued February 1, 1977, Nikko Chemicals Co., Ltd.)”. ”(Pages 854 to 855). Hereinafter, in this specification, the measuring method of HLB is based on this method.

The content of (D) POE alkyl ethers in the oxidizing agent-containing composition is not particularly limited, but is preferably 0.005 to 10% by mass. As a lower limit, More preferably, it is 0.01 mass% or more, More preferably, it is 0.05 mass% or more, Most preferably, it is 0.1 mass% or more. As an upper limit, More preferably, it is 5 mass% or less, More preferably, it is 2 mass% or less, Most preferably, it is 1 mass% or less. By making it in this range, the effect of improving the emulsion stability and coating operability is more exhibited.

The content ratio (D / C) of (D) POE alkyl ethers and (C) cationic surfactant is not particularly limited, but is preferably 0.1 to 12. As a lower limit, More preferably, it is 0.4 or more, Most preferably, it is 0.7 or more. As an upper limit, More preferably, it is 6 or less, Most preferably, it is 1.9 or less. By making it within this range, (D) POE alkyl ethers and (C) cationic surfactants act in a balanced manner, and have excellent effects in hair feel, fading resistance, emulsion stability, and coating operability. Is recognized.

(POE lanolin / lanolin alcohol derivatives)
The oxidizing agent-containing composition of the present invention preferably contains a POE lanolin / lanolin alcohol derivative from the viewpoint of improving emulsion stability and coating operability.
Examples of POE lanolin / lanolin alcohol derivatives include POE (10) lanolin (HLB value 12.0), POE (20) lanolin (HLB value 13.0), POE (30) lanolin (HLB value 15.0). , POE (5) lanolin alcohol (HLB value 12.5), POE (10) lanolin alcohol (HLB value 15.5), POE (20) lanolin alcohol (HLB value 16.0), POE (40) lanolin alcohol ( HLB value 17.0), POE (40) reduced lanolin and the like.

The number of moles of POE chain added to POE lanolin / lanolin alcohol derivatives is not particularly limited, but is preferably 2 to 60. The lower limit is more preferably 5 or more, and particularly preferably 10 or more. As an upper limit, More preferably, it is 50 or less, Most preferably, it is 40 or less. By making it in this range, the effect of improving the emulsion stability and coating operability is more exhibited.

The HLB of the POE lanolin / lanolin alcohol derivatives is not particularly limited, but is preferably 8 or more, more preferably 10 or more, and particularly preferably 13 or more. By making it in this range, the effect of improving the emulsion stability and coating operability is more exhibited.

The content of the POE lanolin / lanolin alcohol derivative in the oxidizing agent-containing composition is not particularly limited, but is preferably 0.001 to 10% by mass. As a lower limit, More preferably, it is 0.005 mass% or more, Most preferably, it is 0.01 mass% or more. As an upper limit, More preferably, it is 5 mass% or less, Most preferably, it is 3 mass% or less. By making it in this range, the effect of improving the emulsion stability and coating operability is more exhibited.

(POE sterols, hydrogenated sterols)
The oxidizing agent-containing composition of the present invention may contain POE sterols and hydrogenated sterols from the viewpoint of improving emulsion stability and coating operability.
Examples of POE sterols and hydrogenated sterols include POE (5) phytosterol (HLB value 9.5), POE (10) phytosterol (HLB value 12.5), POE (20) phytosterol (HLB value 15.5). POE (30) phytosterol (HLB value 18.0), POE (25) phytostanol (HLB value 14.5), POE (30) cholestanol (HLB value 17.0), and the like.

The number of moles of POE chain added to the POE sterol / hydrogenated sterol is not particularly limited, but is preferably 50 or less, more preferably 40 or less, still more preferably 30 or less, and particularly preferably 23 or less. It is. By making it in this range, the effect of improving the emulsion stability and coating operability is more exhibited.

The HLB of the POE sterol / hydrogenated sterol is not particularly limited, but is preferably 8 or more, more preferably 10 or more, and particularly preferably 13 or more. By making it in this range, the effect of improving the emulsion stability and coating operability is more exhibited.

The content of the POE sterol / hydrogenated sterol in the oxidizing agent-containing composition is not particularly limited, but is preferably 0.001 to 10% by mass. As a lower limit, More preferably, it is 0.01 mass% or more, Most preferably, it is 0.05 mass% or more. As an upper limit, More preferably, it is 5 mass% or less, Most preferably, it is 3 mass% or less. By setting it as this range, the effect of improving emulsion stability and application | coating operation property is exhibited more.

<Other surfactants>
The oxidizing agent-containing composition of the present invention may contain a surfactant other than the above-described (C) cationic surfactant and nonionic surfactant.
Examples of other surfactants include anionic surfactants and amphoteric surfactants.

<Anionic surfactant>
As anionic surfactant, alkyl ether sulfate, POE alkyl ether sulfate, alkyl sulfate, alkenyl ether sulfate, alkenyl sulfate, olefin sulfonate, alkane sulfonate, saturated or unsaturated fatty acid salt, alkyl or Examples include alkenyl ether carboxylates, α-sulfone fatty acid salts, N-acyl amino acid type surfactants, phosphate mono- or diester type surfactants, and sulfosuccinates. The counter ion of the anionic group of these surfactants may be any of sodium ion, potassium ion, and triethanolamine, for example.

More specifically, sodium lauryl sulfate, sodium myristyl sulfate, potassium lauryl sulfate, ammonium lauryl sulfate, triethanolamine lauryl sulfate, sodium cetyl sulfate, sodium stearyl sulfate, POE lauryl ether sulfate, POE lauryl ether sulfate triethanolamine, POE Ammonium lauryl ether sulfate, sodium POE stearyl ether sulfate, sodium stearoylmethyl taurate, triethanolamine dodecylbenzenesulfonate, sodium tetradecenesulfonate, sodium lauryl phosphate, POE lauryl ether phosphate and salts thereof, N-lauroyl glutamates (lauroyl) Sodium glutamate, etc.), N-lauroylmethyl-β-alanine salt, N-acy Glycine salts, N- acyl glutamates, higher fatty acid lauric acid, myristic acid and salts of these higher fatty acid are exemplified, it is possible to use more than one or two.

The content of the anionic surfactant in the oxidizing agent-containing composition is not particularly limited, but is preferably 0.01 to 5% by mass. As a lower limit, More preferably, it is 0.05 mass% or more, More preferably, it is 0.1 mass% or more. As an upper limit, More preferably, it is 3 mass% or less, More preferably, it is 1.5 mass% or less.

<Amphoteric surfactant>
Examples of amphoteric surfactants include amino acid type amphoteric surfactants and betaine type amphoteric surfactants.
Specific examples of the amino acid type amphoteric surfactant include, for example, sodium N-lauroyl-N′-carboxymethyl-N′-hydroxyethylethylenediamine (Naurolauroacetic acid Na), 2-alkyl-N-carboxymethyl-N-hydroxyethyl. Imidazolinium betaine, undecylhydroxyethyl imidazolinium betaine sodium, alkyldiaminoethylglycine hydrochloride, N-coconut oil fatty acid acyl-N'-carboxyethyl-N'-hydroxyethylethylenediamine sodium, N-coconut oil fatty acid acyl-N '-Carboxyethoxyethyl-N'-carboxyethylethylenediamine disodium, N-coconut oil fatty acid acyl-N'-carboxymethoxyethyl-N'-carboxymethylethylenediamine disodium, lauryldiaminoe Glycine-type amphoteric surfactants such as sodium glycine, palm oil fatty acid acyl-N-carboxyethyl-N-hydroxyethylethylenediamine sodium, sodium laurylaminopropionate, sodium laurylaminodipropionate, triethanolamine laurylaminopropionate, etc. And aminopropionic acid type amphoteric surfactants.
Specific examples of the betaine-type amphoteric surfactant include, for example, coconut oil alkylbetaine, lauryldimethylaminoacetic acid betaine, myristyldimethylaminoacetic acid betaine, stearyldimethylaminoacetic acid betaine, sodium stearyldimethylbetaine, coconut oil fatty acid amidopropyl betaine, palm Examples include fatty acid amidopropyl betaine, lauric acid amidopropyl betaine, ricinoleic acid amidopropyl betaine, aminoacetic acid betaine type amphoteric surfactants such as stearyl dihydroxyethyl betaine, and sulfobetaine type amphoteric surfactants such as lauryl hydroxysulfobetaine. .

The content of the amphoteric surfactant in the oxidizing agent-containing composition is not particularly limited, but is preferably 0.001 to 5% by mass. As a lower limit, More preferably, it is 0.005 mass% or more, More preferably, it is 0.01 mass% or more. As an upper limit, More preferably, it is 3 mass% or less, More preferably, it is 2.5 mass% or less.

<Other ingredients>
The oxidant-containing composition of the present invention can contain other optional components. For example, oily components, preservatives such as sodium benzoate, organic solvents such as ethanol, saccharides such as sorbitol and maltose, water-soluble polymers such as hydroxyethylcellulose and carboxyvinyl polymer, polydimethylmethylenepiperidinium chloride solution, diallyl chloride Cationized water-soluble polymers such as dimethylammonium / hydroxyethylcellulose, polyhydric alcohols such as polyethylene glycol and dipropylene glycol, chelating agents such as ethylenediaminehydroxyethyl triacetic acid trisodium dihydrate, hydroxyethane diphosphonic acid tetrasodium solution, Examples include inorganic salts such as sodium chloride, pH adjusters such as ammonium hydrogen carbonate, direct dyes, hair-growth ingredients, plant extracts, herbal extracts, amino acids / peptides, urea, vitamins, fragrances, and UV absorbers. .

In addition, in the oxidizing agent containing composition of this invention, since emulsion stability falls by containing 1 mass% or more of cationized water-soluble polymers, cationized water-soluble polymer shall be less than 1 mass%. It is preferable.

<Oil component>
The oil component is a component that is mixed and emulsified with an aqueous component such as water and ethanol and a surfactant. Examples thereof include higher alcohols, fats and oils, waxes, hydrocarbons, higher fatty acids, esters, silicone oils, fluorine oils and the like. One or two or more of these oily components can be selected and used.

Examples of higher alcohols include cetyl alcohol (cetanol), stearyl alcohol, cetostearyl alcohol, oleyl alcohol, linoleyl alcohol, linolenyl alcohol, aralkyl alcohol, behenyl alcohol, lauryl alcohol, myristyl alcohol, 2-hexyldecanol, isostearyl. Examples thereof include alcohol, 2-octyldodecanol, decyltetradecanol, phytosterol, phytostanol, cholesterol, cholestanol, lanosterol and ergosterol.

Oils and fats are triglycerides, that is, triesters of fatty acids and glycerin. For example, olive oil, rosehip oil, camellia oil, shea fat, macadamia nut oil, almond oil, tea seed oil, sasanqua oil, safflower oil, sunflower oil, soybean oil, cottonseed oil, sesame oil, beef fat, cacao butter, corn oil, peanut Oil, rapeseed oil, rice bran oil, rice germ oil, wheat germ oil, pearl barley oil, grape seed oil, avocado oil, carrot oil, castor oil, flaxseed oil, coconut oil, mink oil, egg yolk oil and the like.

ロ ウ Waxes are esters of higher fatty acids and higher alcohols. For example, beeswax (cane wax), candelilla wax, carnauba wax, jojoba oil, lanolin, whale wax, rice bran wax, sugar cane wax, palm wax, montan wax, cotton wax, bayberry wax, ibota wax, capock wax, shellac wax, and the like.

Hydrocarbon is a compound consisting of carbon and hydrogen. Examples thereof include liquid paraffin, paraffin, microcrystalline wax, petrolatum, isoparaffins, ozokerite, ceresin, polyethylene, α-olefin oligomer, polybutene, synthetic squalane, squalene, hydrogenated squalane, limonene, turpentine oil and the like.

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, lanolin fatty acid, etc. Is mentioned.

Esters are compounds obtained by a dehydration reaction between a fatty acid and an alcohol. For example, diisopropyl adipate, 2-hexyldecyl adipate, isopropyl myristate, myristyl myristate, cetyl octanoate, cetyl isooctanoate, isononyl isononanoate, diisopropyl sebacate, isopropyl palmitate, 2-ethylhexyl palmitate, Cetyl ethylhexanoate, butyl stearate, isocetyl isostearate, hexyl laurate, decyl oleate, fatty acid (C10-30) (cholesteryl / lanosteryl), lauryl lactate, octyldodecyl lactate, lanolin acetate, dipentaerythritol fatty acid ester, mono Examples thereof include N-alkyl glycol isostearate and lanolin derivatives.

Silicone oil is a synthetic polymer in which silicon with organic groups and oxygen are alternately linked by chemical bonds. For example, dimethylpolysiloxane (INCI name: dimethicone), dimethylpolysiloxane having hydroxy end groups (INCI name: dimethiconol), methylphenylpolysiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, polyether-modified silicone, average Examples thereof include highly polymerized silicones having a polymerization degree of 650 to 10,000, amino-modified silicones, betaine-modified silicones, alkyl-modified silicones, alkoxy-modified silicones, mercapto-modified silicones, carboxy-modified silicones, and fluorine-modified silicones.

Among the above, amino-modified silicones include, for example, aminopropylmethylsiloxane / dimethylsiloxane copolymer (INCI name: aminopropyl dimethicone), aminoethylaminopropylsiloxane / dimethylsiloxane copolymer (INCI name: amodimethicone), And aminoethylaminopropylmethylsiloxane / dimethylsiloxane copolymer (INCI name: trimethylsilylamodimethicone).

The content of the oil component in the oxidizing agent-containing composition is not particularly limited, but is preferably 0.1 to 30% by mass. As a lower limit, More preferably, it is 0.5 mass% or more, More preferably, it is 1 mass% or more. As an upper limit, More preferably, it is 20 mass% or less, More preferably, it is 10 mass% or less.

[About the first agent]
A 1st agent is mixed with the 2nd agent which consists of an oxidizing agent containing composition of this invention, and comprises a hair treatment agent, and is a composition containing an alkaline agent. In addition, an oxidation dye or the like is appropriately blended depending on the use of a hair treatment agent such as an oxidation hair dye, a hair bleaching agent or a hair decoloring agent. For example, an oxidative hair dye contains an oxidative dye and an alkali agent.

The form of the first agent may be any form, for example, liquid, emulsion, cream, gel and the like. In the case of containing an oil component, the O / W type, W / O type, W / O / W type and the like are not particularly limited, but may be an O / W type emulsion, cream or gel. preferable. Furthermore, it is good also as foam form or mist form at the time of use. In the case of foaming, an aerosol former container or a non-aerosol foamer container may be used.

Next, each component contained in the first agent will be described in detail.
<Alkaline agent>
The alkaline agent has a function of swelling hair and promoting penetration of a dye or an oxidizing agent. Examples of the alkaline agent include ammonia, alkanolamine, silicate, carbonate, bicarbonate, metasilicate, phosphate, basic amino acid, hydroxide and the like. Specifically, examples of the alkanolamine include monoethanolamine, diethanolamine, triethanolamine, monoisopropanolamine, aminomethylpropanol, and isopropylamine, and examples of the silicate include sodium silicate and potassium silicate. Examples of the carbonate include sodium carbonate, ammonium carbonate, magnesium carbonate, and guanidine carbonate. Examples of the bicarbonate include sodium bicarbonate and ammonium bicarbonate. Examples of the metasilicate include sodium metasilicate and potassium metasilicate. Illustrative examples of the phosphate include monoammonium phosphate, secondary ammonium phosphate, disodium monohydrogen phosphate, trisodium phosphate and the like, and basic amino acids include arginine, lysine and salts thereof. There are exemplified, as the hydroxides of calcium hydroxide, magnesium hydroxide and the like. Among these, ammonia and alkanolamine are preferable.

The content of the alkali agent in the first agent is not particularly limited, but is preferably 0.01 to 20% by mass. As a lower limit, More preferably, it is 0.1 mass% or more. As an upper limit, More preferably, it is 15 mass% or less.

<Oxidation dye>
The oxidation dye is a dye that develops color by oxidative polymerization with an oxidizing agent. Oxidative dyes include dye intermediates that develop color by their own oxidation and couplers that have various color tones depending on the combination of the dye intermediates.

Dye intermediates are dye precursors that are primarily o- or p-phenylenediamines or aminophenols, and are themselves typically colorless or weakly colored compounds.
Specifically, p-aminophenol, o-aminophenol, p-methylaminophenol, p-phenylenediamine, toluene-2,5-diamine, N-phenyl-p-phenylenediamine, 4,4′-diaminodiphenylamine 2-hydroxyethyl-p-phenylenediamine, o-chloro-p-phenylenediamine, 4-amino-m-cresol, 2-amino-4-hydroxyethylaminoanisole, 2,4-diaminophenol, 2,2 ′ -[(4-aminophenyl) imino] bisethanol and salts thereof such as sulfates and hydrochlorides thereof are exemplified.

The coupler mainly includes m-diamines, aminophenols or diphenols, and specifically includes m-aminophenol, 5-amino-o-cresol, resorcin, catechol, pyrogallol, phloroglucin, gallic acid. , Hydroquinone, 5- (2-hydroxyethylamino) -2-methylphenol, m-phenylenediamine, 2,4-diaminophenoxyethanol, toluene-3,4-diamine, α-naphthol, 2,6-diaminopyridine, diphenylamine 3,3′-iminodiphenyl, 1,5-dihydroxynaphthalene, tannic acid, 1-hydroxyethyl-4,5-diaminopyrazole, and salts thereof such as sulfates and hydrochlorides.

These oxidation dyes can be used by selecting one kind or two or more kinds according to a desired color tone.
The content of the oxidation dye in the hair treatment agent is not particularly limited, but is preferably 0.01 to 10% by mass. As a lower limit, More preferably, it is 0.05 mass% or more. As an upper limit, More preferably, it is 7 mass% or less.

<Other ingredients>
If it is other than an oxidizing agent, other components can be appropriately blended in the first agent as necessary. For example, “cationic surfactant”, “nonionic surfactant”, “amphoteric surfactant”, “other components”, “oil component” and the like described in the section of the oxidizing agent-containing composition are optional components. Can be blended as Moreover, you may mix | blend antioxidants, such as ascorbic acid.

[About hair treatment method]
The hair treatment method of the present invention comprises a step of preparing a hair treatment agent for an already-dyed portion by mixing the first agent used for the new part and the second agent comprising the oxidizing agent-containing composition of the present invention, and Applying a hair treatment agent for a pre-dyed part to the pre-dyed part of the hair.

In addition, the hair treatment method of the present invention mixes the first agent used for the nascent part with the conventional second agent having an acid content of less than 0.4% by mass to obtain a hair treatment agent for the nascent part. You may further provide the process of preparing, and the process of applying the hair treatment agent for newborn parts to the newborn part of hair.

Here, the first agent used in the new part has sufficient hair dyeing power when the new part is subjected to hair dyeing treatment. The content of the alkali agent is appropriately adjusted so as to have a sufficient hair dyeing power for the newly formed part, and is usually 0.1 to 12% by mass. Further, the pH of the first agent used in the new part is not particularly limited, but is 8 to 12.

The conventional second agent has an acid content of less than 0.4% by mass, and its pH is not particularly limited, but is usually 3 to 7.

Further, the pH of the hair treatment agent for pre-dyed parts is preferably 9.7 or less, and the pH of the hair treatment agent for new parts is preferably 9.8 to 11.0.

The step of mixing the first agent and the second agent to prepare the hair treatment agent for the pre-dyed part or the new part is an operation of mixing the first agent and the second agent. For example, the first agent and the second agent Examples include a step of putting two agents in a container and shaking and mixing the container, a step of mixing with a stirring rod and a stirring blade, a step of mixing with an applicator such as a brush, and the like.

The step of applying the hair treatment agent to the pre-dyed or new part of the hair is a step of applying the hair treatment agent to the hair. For example, a step of applying the hair treatment agent to the hair with an applicator such as a brush or a comb or wearing gloves The process etc. which apply | coat to hair with the done hand are mentioned. From the viewpoint of suppressing the occurrence of uneven coating, a step of applying to the hair with a brush is preferred, and from the viewpoint of simplicity of the coating operation, a step of applying to the hair with a hand wearing gloves is preferred.

In the following examples, a hair bleaching agent and an oxidative hair dye comprising the oxidant-containing composition of the present invention are prepared as hair treatment agents, and the present invention is specifically described. However, the technical scope of the present invention is not limited by these examples.

[Preparation of oxidizing agent-containing composition (second agent)]
As the second agent of the oxidative hair dye, oxidant-containing compositions having the compositions shown in Tables 1 to 4 below were prepared. The manufacturing method of an oxidizing agent containing composition puts each component other than hydrogen peroxide and phenoxyethanol in a container, melt | dissolves and emulsifies at 80 degreeC, and makes it cool to 40 degreeC. Thereafter, hydrogen peroxide and phenoxyethanol are added, and the mixture is prepared with water to a total of 100% by mass. For the mixer, an “emulsification tester ET-SA type” (manufactured by Nikko Chemicals) was used.
Next, the pH of the oxidizing agent-containing composition of each example was measured and shown in the section “pH of the second agent” in Tables 1 to 4. The pH was measured using “pH meter F-52” manufactured by Horiba, Ltd. The second agent was measured with a pH meter without dilution.

[First agent]
(Hair depigmenting agent)
As a first hair bleaching agent, “Promaster EX LT” manufactured by Hoyu Co., Ltd. was used.
(Oxidative hair dye)
“Promaster EX R 7/6” manufactured by Hoyu Co., Ltd. was used as the first agent for the oxidative hair dye.
In addition, these 1st agents contain sufficient alkaline agent, and are utilized as "for new parts".

[Preparation of hair bleach and oxidative hair dye]
The first agent and the second agent comprising the oxidizing agent-containing composition of each example were mixed at 1: 1 to prepare a hair bleaching agent and an oxidative hair dye.
Next, the pH of the oxidative hair dye was measured and shown in the section “pH of oxidative hair dye” in Tables 1 to 4. The pH of the oxidative hair dye was measured by diluting to 1% by mass with purified water and reducing the viscosity in the same manner as the second agent.

[Evaluation methods]
About the oxidative hair dye of each example, the application | coating operability to hair, the touch of the hair after a hair dyeing process, and the fading resistance of the hair after a hair dyeing process were evaluated. The oxidant-containing composition of each example used as the second agent was evaluated for emulsification stability, and comprehensively evaluated together with the application operability to the hair.
About these evaluation items, the evaluation method is shown below.

<Evaluation of hair feel>
In accordance with the following decoloring treatment method and hair dyeing treatment method, the white hair bundle was subjected to decoloring treatment 10 times, and further, the hair dyeing treatment was performed once. About the obtained dyed hair bundle, the touch when 20 panelists specializing in the touch of the hair passed the finger was evaluated. The evaluation criteria are 6 points for panelists rated 18 or more, 5 points for 10 to 12 people, and 10 to 12 people who evaluated that the hair was not damaged and was very smooth and very good to follow. Cases were 4 points, 7 to 9 people were 3 points, 4 to 6 people were 2 points, and 3 to 1 or less were 1 point. The results are shown in the “Hair feel” section of Tables 1-3.

(Decolorization processing method)
3 g of a hair bleaching agent was applied to 1 g of the hair bundle and left at 30 ° C. for 30 minutes. Thereafter, the hair depigmenting agent was washed away by rinsing the hair bundle, and further washed twice with shampoo (Promaster Color Care Stylish Shampoo manufactured by Hoyu Co., Ltd.) to wash off the hair depigmenting agent. Next, a treatment (Promaster Color Care Stylish Hair Treatment manufactured by Hoyu Co., Ltd.) was applied to the hair bundle. After rinsing the hair bundle and rinsing the treatment, the moisture in the hair bundle was wiped off with a towel and finally dried with a dryer.

(Hair dyeing method)
3 g of the oxidative hair dye was applied to 1 g of the hair bundle and left at 25 ° C. for 20 minutes. Thereafter, the hair bundle was rinsed to wash away the oxidation hair dye, and further washed twice with a shampoo (Promaster Color Care Stylish Shampoo manufactured by Hoyu Co., Ltd.) to wash off the oxidation hair dye. Next, a treatment (Promaster Color Care Stylish Hair Treatment manufactured by Hoyu Co., Ltd.) was applied to the hair bundle. After rinsing the hair bundle and rinsing the treatment, the moisture in the hair bundle was wiped off with a towel and finally dried with a dryer.

<Evaluation of fading resistance>
In the same manner as the above-mentioned “feel of hair”, the following discoloration treatment was performed on the hair bundle obtained by performing the decolorization treatment 10 times and the hair dyeing treatment once on the white hair bundle.
(Fading process)
The hair bundle that had been subjected to the above decoloring treatment and hair dyeing treatment was immersed in a 1% aqueous solution of sodium lauryl sulfate at 50 ° C. for 10 minutes to give a fading treatment. Then, it was thoroughly washed with water and dried with a dryer.
(Evaluation of fading resistance)
The hair bundles of each example subjected to fading treatment were compared side by side, and 20 professional panelists evaluated them visually. The evaluation criteria are 6 points for hair bundles of 18 or more, 5 points for hair bundles of 13 to 17 people, and 10 to 12 people for panelists evaluated that the color fading due to fading treatment is small and the color of hair is very excellent. The hair bundle of 4 points, 3 of 7-9 hair bundles, 2 points of 4-6 hair bundles, 1 point of hair bundles of 3 or less were used as the evaluation results. The results are shown in the “Fade resistance” section of Tables 1-3.

<Evaluation of compatibility between emulsification stability and coating operability>
Emulsification stability and coating operability were evaluated using the following evaluation methods, respectively. Next, the total of the average points of each evaluation is calculated, the evaluation is when the total score is 11 points or more, the evaluation is 6 when the score is 9 to 10 points, the evaluation is 5 when the score is 7 to 8 points, and the evaluation is 5 The case of ˜6 points was evaluated 3, the case of 3 points to 4 points was evaluated 2, the case of 2 points or less was evaluated 1, and the evaluation result. The first decimal place of the total score is rounded off. The results are shown in the section “Compatibility of emulsification stability and applicability” in Tables 1 to 3.

(Emulsification stability evaluation method)
The oxidizing agent-containing composition of each example was filled up to about 8 minutes in a transparent No. 4 standard bottle (about 37 mL capacity) and sealed. This was left still in a 25 degreeC thermostat, and 10 panelists evaluated the emulsified state 24 hours later visually. The evaluation criteria are 6 points for which no separation is observed, 5 points for which almost no separation is observed, 4 points for cases where little separation is observed, and 3 points for cases where slight separation is observed. 2 points were recognized, and 1 point was markedly separated. An average score was calculated for the scoring results of each panel.

(Application operability evaluation method)
The oxidative hair dye used in the hair dyeing treatment method was applied to human hair using a brush, and the operability of each oxidative hair dye was evaluated by 10 panelists. The evaluation method evaluates each item of the ease of taking the hair dye of the oxidative hair dye, the elongation when applied to the hair and the biting on the hair, and 6 points when all items are very good, 5 points if 2 of any item are very good and the other one is good, 4 items if one of the items is very good and the other 2 are good Is 2 points if any of the items is good, 2 points if the remaining one is insufficient, and 1 point if two or more of the items are insufficient It was. An average score was calculated for the scoring results of each panel.

 

Referring to Table 1, when the content of (A) phosphoric acid in the oxidizing agent-containing composition was 0.4% by mass or more, an excellent effect was evaluated in the evaluation of “hair feel”. That is, (A) By using the oxidizing agent-containing composition containing 0.4% by mass or more of phosphoric acid as the second agent, hair damage due to the hair dyeing treatment is reduced, which is suitable for already-dyed parts. A second agent can be provided.
Moreover, the effect that it was excellent in fading resistance was also recognized by making content of (A) phosphoric acid in an oxidizing agent containing composition into 0.4 mass% or more.

Next, when examining the pH of the second agent in detail, when the amount of (A) phosphoric acid added is small, the pH of the second agent rapidly decreases, but (A) a large amount of phosphoric acid is added. In this case, a phenomenon was observed in which the decrease was slow when the pH was about 1.5. In Example 1 in which the amount of phosphoric acid added in the oxidizing agent-containing composition was 1.3% by mass, compared with Example 2 in which the amount of phosphoric acid added was 0.42% by mass, Despite the fact that the pH of the two agents hardly decreased, an extremely excellent effect in hair feel and anti-fading property was observed. That is, it can be said that the effect of the present invention is exhibited not only depending on the pH of the second agent but depending on the amount of acid added.

From the above results, by using the oxidizing agent-containing composition containing (A) phosphoric acid in an amount of 0.4% by mass or more as the second agent, it is possible to oxidize the dyed portion using the first agent for the new part. A hair dye can be obtained. Therefore, since it is not necessary to prepare the first agent for the pre-stained part in which the amount of the alkaline agent is reduced, the types of the first agent for the pre-staining part can be reduced.

 

In Examples 3 to 8 in Table 2, an oxidizing agent-containing composition containing citric acid, tartaric acid and lactic acid as other acids was evaluated. According to this, like other phosphoric acids, the hair content and fading resistance can be improved by setting the content of (A) acid in the oxidizing agent-containing composition to 0.4% by mass or more. Is recognized.

Further, when Examples 3 and 4 are compared with Comparative Example 3 in Table 1, the pH of the oxidative hair dye is 9.7, whereas in Examples 3 and 4, hair feel and resistance An improvement in color is observed. This result also shows that the effect of the present invention does not depend on the pH of the oxidative hair dye but on the acid content.

In addition, by increasing the content of (A) acid, the hair feel and discoloration resistance were improved, while the tendency of the emulsion stability to decrease was observed. The content is preferably 2.5% by mass or less.

Furthermore, when Examples 1, 7, and 8 are compared, it is recognized that as the acid valence increases, not only the feel and fading resistance of the hair are improved, but also the emulsion stability and the coating operability are improved. It was.
In Example 8, separation was observed after 2 months of storage at room temperature (25 ° C.). That is, it can be said that long-term storage stability improves as the valence of the acid increases.

 

Looking at Examples 1 and 9 to 14 in Table 3, by containing (C) a cationic surfactant, an excellent effect on the feel of hair was recognized.
Moreover, the effect of improving emulsification stability was recognized by containing (C) cationic surfactant.

Furthermore, when the content of (C) the cationic surfactant is large, the effect of improving the feel and emulsification stability of the hair is enhanced, and when the content of (C) the cationic surfactant is small. In addition, the tendency to improve the anti-fading property and the coating operability was observed. Therefore, by adjusting the content of the (C) cationic surfactant within the range of 0.1 to 1.5% by mass, the hair feel, fading resistance, emulsion stability and coating operability are balanced. The effect can be demonstrated.

<Evaluation of color change>
Next, changes in color tone due to addition of acid were evaluated for the oxidizing agent-containing compositions of Examples 1 and 6 to 8. The evaluation was performed as follows, and the results are shown in the section “Suppression of color tone change” in Table 4.

(Preparation of pre-dyed part model hair bundle)
Similar to the test for “fading resistance”, the white hair bundle was subjected to decoloring treatment 10 times, hair dyeing treatment 1 time, and fading treatment 1 time to prepare a pre-dyed hair bundle.
Furthermore, the second agent comprising the first agent (Promaster EX R 7/6 manufactured by Hoyu Co., Ltd.) and the oxidant-containing composition of Examples 1 and 6 to 8 was added to the already-dyed hair bundle. The dyed hair treatment was used to prepare a pre-dyed part model hair bundle. The operation of this hair dyeing treatment was performed in the same manner as in the evaluation of the “feel of hair” described above.

(Preparation of new part model hair bundle)
The white hair bundle is dyed with the first agent (Promaster EX R 7/6 manufactured by Hoyu Co., Ltd.) and the second agent comprising the oxidizing agent-containing composition of Comparative Example 5 to produce a new hair. A partial model hair bundle was prepared. The operation of this hair dyeing treatment was performed in the same manner as in the evaluation of the “feel of hair” described above except that the condition of leaving the acid hair dye after application was changed to 30 ° C. for 30 minutes.

(Evaluation method of color change)
The difference in color tone between the dyed part model hair bundle (hereinafter referred to as “hair bundle A”) in each example and the above-described new part model hair bundle (hereinafter referred to as “hair bundle B”) was evaluated. In the evaluation method, the hair bundle A and the hair bundle B were placed side by side under a standard light source, and observed by 20 panelists. The evaluation criteria are 6 points when the panelists evaluated that the color difference between the hair bundle A and the hair bundle B is small and form a natural connection is 18 or more, 5 points for 13 to 17 people, 10 to 10 The evaluation results were 4 points for 12 people, 3 points for 7 to 9 people, 2 points for 4 to 6 people, and 1 point for 3 to 1 people or less.

 

When the evaluation of suppression of color tone change in Examples 1 and 6 to 8 was compared, the color tone change suppressing effect was recognized by containing a trivalent or higher acid, and particularly excellent effect was observed by containing phosphoric acid. . This color tone change suppressing effect was confirmed even when a cold-colored or natural-based first agent was used in addition to the warm-colored color of the example.

The oxide-containing composition of the present invention is used as a second agent of a hair treatment agent such as a hair dye, a hair decoloring agent, or a hair decoloring agent, and is used as a hair treatment agent for damaged hair such as a pre-dyed portion of hair. It can be suitably used. The hair may be human hair such as human hair, eyelashes, eyebrows, shank, or animal hair such as pets.
Moreover, the oxide-containing composition of the present invention can be used as a second agent for a hair treatment agent for a beauty salon or a barber shop or a second agent for a hair treatment agent for self-coloring.

The hair treatment method of the present invention can be suitably used for hair having an already dyed part, for hair dyeing, decoloring or hair dyeing of the already dyed part.
Moreover, the usage method of the powder hair dye composition of this invention can be utilized for the hair coloring process of a hair salon, a barber shop, etc., and a self coloring.

Claims (5)

1. The oxidizing agent-containing composition used as the second agent of the hair treatment agent is characterized by containing (A) an acid and (B) an oxidizing agent, and containing 0.4% by mass or more of the (A) acid. An oxidizing agent-containing composition.
2. The oxidant-containing composition according to claim 1, further comprising (C) 0.1 to 1.5% by mass of a cationic surfactant.
3. The oxidizing agent-containing composition according to claim 1 or 2, wherein the (A) acid contains a trivalent or higher acid.
4. The oxidant-containing composition according to claim 1 or 2, wherein the oxidant-containing composition is for a pre-dyed part.
5. A step of preparing a hair treatment agent for a pre-dyed part by mixing the first agent used for the new part and the second agent comprising the oxidizing agent-containing composition according to claim 1, and the hair treatment agent A process applied to the already dyed part of the hair,
   A hair treatment method comprising: