JP2002068946A - Hair cosmetic composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a hair cosmetic composition composed of a 1st and a 2nd agents easily miscible with each other. SOLUTION: This hair cosmetic composition used as an oxidative hair-dye is prepared by mixing a 1st agent containing an alkaline agent with a 2nd agent containing an oxidizing agent in an applicator. The specific gravity ratio of the 1st and the 2nd agents (specific gravity of the 1st agent/specific gravity of the 2nd agent) is adjusted to 0.98-1.10. The 1st agent is preferably an O/W- type emulsion and the viscosity ratio of the 1st and the 2nd agent (viscosity of the 1st agent/viscosity of the 2nd agent) is preferably 20-500 in this case. The 1st agent contains at least one kind of specific gravity controlling agent selected from a polyhydric alcohol having a specific gravity of 1.20-1.80 and a saccharide having a specific gravity of 1.20-1.80.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a hair cosmetic composition applied to hair, such as an oxidative hair dye and a hair bleaching agent.

[0002]

2. Description of the Related Art A hair cosmetic composition of this type is prepared by mixing a first agent (first agent) containing an alkaline agent and a second agent (second agent) containing an oxidizing agent. Are used as oxidative hair dyes.

[0003] The mixing of the first agent and the second agent is usually performed in an applicator at the time of use. The mixed hair cosmetic composition is applied to the hair using a comb or a nozzle provided in the applicator.

[0004]

However, in the case of a conventional hair cosmetic composition, the first agent contains the second agent because of the large difference in the specific gravity between the first agent and the second agent. When put into an applicator, the first agent and the second agent are separated into upper and lower layers, and there is a problem that mixing is not easy.

The present invention has been made by focusing on the problems existing in the prior art as described above. An object of the present invention is to provide a hair cosmetic composition which is excellent in mixing properties of a first agent and a second agent.

[0006]

In order to achieve the above object, the invention according to claim 1 is directed to a first agent containing at least one of an alkali agent and a reducing agent and a second agent containing an oxidizing agent. A hair cosmetic composition prepared by mixing two or more agents containing at least both of the above agents, wherein the specific gravity ratio of the first agent and the second agent is 0.98 to 1.10. The gist is that there is.

The gist of the invention according to claim 2 is that the hair cosmetic composition according to claim 1 is an oxidative hair dye or a hair bleaching agent. The invention according to claim 3 is
The gist of the hair cosmetic composition according to claim 1 or 2, wherein the first agent is an oil-in-water emulsion.

According to a fourth aspect of the present invention, in the hair cosmetic composition according to the third aspect, the viscosity of the first agent is one.
The gist is that the viscosity of the second agent is less than 1000 millipascal seconds.

According to a fifth aspect of the present invention, in the hair cosmetic composition according to the third or fourth aspect, the ratio of the viscosity of the first agent to the viscosity of the second agent (the viscosity of the first agent) / Viscosity of the second agent) is from 20 to 500.

The invention according to claim 6 is the hair cosmetic composition according to any one of claims 1 to 5, wherein the first agent has a specific gravity of 1.20 to 1.80. The point is that at least one selected from polyhydric alcohols and saccharides having a specific gravity of 1.20 to 1.80 is blended as a specific gravity adjuster.

According to a seventh aspect of the present invention, in the hair cosmetic composition according to any one of the first to sixth aspects, the first agent and the second agent are mixed in an applicator. It is the gist that it is done.

[0012] The invention according to claim 8 is characterized in that in the hair cosmetic composition according to claim 7, the applicator includes a double container consisting of an inner container and an outer container.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION (First Embodiment) Hereinafter, a first embodiment in which the present invention is embodied in a hair cosmetic composition used as an oxidative hair dye will be described in detail.

The hair cosmetic composition according to the present embodiment comprises:
It is obtained by mixing two kinds of the first agent as the first agent and the second agent as the second agent. In addition, the hair cosmetic according to the present embodiment includes a first agent and a second agent.

The ratio of the specific gravity of the first agent to the second agent (specific gravity of the first agent / specific gravity of the second agent) can be set in a range of 0.98 to 1.10. .98-
1.05. If this ratio is less than 0.98, the first
When the agent is placed in the applicator containing the second agent, the first
Since the agent floats on the surface of the second agent, the mixing property is reduced. Conversely, when the ratio exceeds 1.10, the first agent completely sinks into the second agent, so that the mixing property is reduced.

The ratio of the viscosities of the first and second agents (the viscosity of the first agent / the viscosity of the second agent) is not particularly limited. However, when the first agent is an oil-in-water emulsion, -500 is preferable, and 30-300 is more preferable. If this ratio is less than 20, the viscosity (mixing viscosity) of the hair cosmetic composition becomes small, causing dripping or scattering when applied to hair. Conversely, if it exceeds 500, the mixing property between the first agent and the second agent may be reduced.

When mixing the first agent and the second agent,
The first agent and the second agent are preferably mixed at a weight ratio of 1: 3 to 2: 1, more preferably at a ratio of 1: 2 to 1: 1.

[First Agent] The first agent in the present embodiment contains a dye such as an oxidation dye intermediate, an alkali agent and the like.

Examples of oxidation dye intermediates include phenylenediamines, aminophenols, toluylenediamines, aminonitrophenols, diphenylamines, diaminophenylamines, N-phenylphenylenediamines, diaminopyridines and the like. (Hydrochloride, sulfate, acetate, etc.). Among them, paraphenylenediamine, paratoluylenediamine, N, N-bis (2-hydroxyethyl) -paraphenylenediamine, N-phenyl-paraphenylenediamine, 4,4′-diaminodiphenylamine, 2-chloroparaphenylenediamine, N, N-dimethylparaphenylenediamine, paraaminophenol, 2,6-dichloroparaphenylenediamine, paraaminophenylsulfamic acid and salts thereof are preferred from the viewpoint of hair dyeing power.
These oxidation dye intermediates may be blended alone or in combination of two or more.

The amount of the oxidation dye intermediate is 0.1% of the first agent.
It is preferably from 01 to 15% by weight, more preferably from 0.1 to 10% by weight. If the amount is less than 0.01% by weight, a sufficient hair dyeing effect cannot be obtained. If the amount exceeds 15% by weight, the hair dyeing effect is not particularly improved, so that it is uneconomical to mix the amount exceeding 15% by weight. 0.1-10
When it is set in the range of weight%, both the hair dyeing effect and the economical effect can be exhibited in a well-balanced manner.

Examples of the alkaline agent include ammonia, alkanolamines (triethanolamine, diethanolamine, monoethanolamine, isopropanolamine, diisopropanolamine, 2-amino-2-methyl-1-propanol, etc.), organic amines (2-amino-2-methyl-1,3-propanediol, guanidine, etc.), inorganic alkalis (sodium hydroxide, potassium hydroxide, etc.), basic amino acids (arginine, lysine, etc.) and salts thereof. . These alkali agents may be blended alone or in combination of two or more. Further, the first agent may have a buffering action by blending two or more alkali agents in an appropriate combination. It is preferable that the blending amount of the alkaline agent is set to an amount such that the pH of the first agent is in the range of 8 to 12.

In the first part, a dye may be directly blended as a dye other than the oxidation dye intermediate. When a direct dye is blended, the hair dyeing effect can be further enhanced. Examples of the direct dye include 4-nitro-m-phenylenediamine, 4-nitro-o-phenylenediamine, 2-nitro-m-phenylenediamine and 2-nitro-m-phenylenediamine.
Nitro-p-phenylenediamine, picramic acid, 1-
Amino-4-methylanthraquinone, 1,4-diaminoanthraquinone, 2-amino-4-nitrophenol,
2-Amino-5-nitrophenol and salts thereof, and acid dyes and oil-soluble dyes specified by “Ministerial Ordinance for Specifying Tar Dyes that can be Used in Pharmaceuticals and the like” (notified in 1971, Ministry of Health and Welfare). No. The acid dyes include Red No. 2, Red No. 3, Red No. 102, Red No. 104 (1), Red No. 105 (1), and Red No. 106.
Red No. 201, Red No. 227, Red No. 230 (1), Red No. 230 (2), Red No. 231 and Red No. 2
No. 32, Red No. 401, Red No. 502, Red No. 503,
Red No. 504, Red No. 506, Yellow No. 4, Yellow No. 5, Yellow No. 202 (1), Yellow No. 202 (2), Yellow No. 20
No. 3, Yellow 402, Yellow 403 (1), Yellow 40
No. 6, yellow 407, orange 205, orange 207, orange 402, green 3, green 204
No., Green No. 205, Green No. 401, Green No. 402, Purple No. 401, Blue No. 1, Blue No. 2, Blue No. 202, Blue No. 2
No. 03, Blue No. 205, Brown No. 201, Black No. 401, etc., and the oil-soluble dyes include Red No. 215 and Red No. 2
18, red 225, orange 201, orange 206, yellow 201, yellow 204, green 202
No., Purple No. 201, Red No. 501, Red No. 505, Orange No. 403, Yellow No. 404, Yellow No. 405, Blue No. 4
No. 03 etc. These direct dyes may be blended alone or in combination of two or more.

When the direct dye is blended with the first agent, the amount is preferably 0.001 to 10% by weight of the first agent.
0.01 to 5% by weight is more preferred. When the blending amount is 0.
If it is less than 001% by weight, a sufficient hair coloring effect cannot be obtained. If the amount exceeds 10% by weight, the hair dyeing effect is not particularly improved. When it is set in the range of 0.01 to 5% by weight, both the hair dyeing effect and the economical effect can be exhibited in a well-balanced manner.

Further, as a dye other than the oxidation dye intermediate, the following dye may be blended in the first agent in place of the direct dye or in addition to the direct dye. When this dye is blended, the hair dyeing effect can be further enhanced. Examples of such dyes include resorcin, pyrogallol, catechol, metaaminophenol, metaphenylenediamine, orthoaminophenol, 2,4-diaminophenol, 1,2,4-benzenetriol, and toluene-3,4-diamine , Toluene-2,4-diamine, hydroquinone, α-naphthol, 2,6-diaminopyridine, 1,5-dihydroxynaphthalene, 5-aminoorthocresol, diphenylamine, paramethylaminophenol, 2,4-diaminophenoxyethanol, gallic Examples include acid, tannic acid, ethyl gallate, methyl gallate, propyl gallate, quintet, 5- (2-hydroxyethylamino) -2-methylphenol, and salts thereof. These dyes may be used alone or in combination of two or more.

When the above-mentioned dye is blended with the first agent, the amount is preferably 0.01 to 10% by weight of the first agent.
0.1 to 5% by weight is more preferred. If the amount is 0.0
If it is less than 1% by weight, a sufficient hair dyeing effect cannot be obtained.
In addition, if the amount exceeds 10% by weight, the hair dyeing effect is not particularly greatly improved. Therefore, it is uneconomical to mix the amount exceeding 10% by weight. When set in the range of 0.1 to 5% by weight,
Both hair dyeing effect and economical effect can be exhibited in a well-balanced manner.

Further, at least one selected from polyhydric alcohols, saccharides, oily components, higher alcohols and the like may be added to the first agent as other additional components. Examples of the polyhydric alcohol include propylene glycol, 1,
Examples thereof include 3-butanediol, dipropylene glycol, glycerin, diglycerin, triglycerin, tetraglycerin, and polyglycerin (degree of polymerization of 5 or more).
In the case where a polyhydric alcohol is blended as a specific gravity adjuster for increasing the specific gravity of the first agent, the specific gravity among them is 1.20 to 20.
1.80 are preferred. When the specific gravity is smaller than 1.20, the amount of the specific gravity adjusting agent required to adjust the specific gravity to a target value increases, and when it is larger than 1.80, the polyhydric alcohol is uniformly dispersed in the first agent. It is not preferable because it becomes difficult. Examples of the polyhydric alcohol having a specific gravity of 1.20 to 1.80 include glycerin, diglycerin, triglycerin, tetraglycerin, and polyglycerin (degree of polymerization of 5 or more). These polyhydric alcohols may be used alone or in combination of two or more.

Examples of the saccharides include sorbitol, maltose, mannitol, xylitol, xylose, maltitol, sucrose and its esters, glucose and the like. When a saccharide is blended as a specific gravity adjusting agent for increasing the specific gravity of the first agent, the specific gravity among them is 1.2.
Those having 0 to 1.80 are preferred. When the specific gravity is smaller than 1.20, the amount of the specific gravity adjuster required to adjust the specific gravity to a target value increases, and when it is larger than 1.80, the saccharides can be uniformly dispersed in the first agent. It is not preferable because it becomes difficult. Examples of the saccharide having a specific gravity of 1.20 to 1.80 include sorbitol, mannitol, and glucose.
These saccharides may be used alone or in combination of two or more.

The amount of the specific gravity adjusting agent comprising at least one selected from the group consisting of polyhydric alcohols and saccharides is set so that the specific gravity of the first agent attains a target value.
It is 3 to 20% by weight of the agent, more preferably 5 to 10% by weight.

As the oily component, for example, avocado oil,
Fats and oils such as jojoba oil, macadamian nut oil and glyceride of olive oil, waxes such as beeswax and lanolin, hydrocarbons such as liquid paraffin, solid paraffin, isoparaffin and squalane, esters such as isopropyl myristate and octyldodecyl myristate , Dimethylpolysiloxane, methylphenylpolysiloxane, silicone derivatives such as polyether-modified silicone, amino-modified silicone, lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, hydroxystearic acid, undecylenic acid, isostearic acid Fatty acids such as acid, linoleic acid, linolenic acid and the like can be mentioned.
These oil components may be used alone or in combination of two or more.

Examples of higher alcohols include lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol, cetostearyl alcohol, behenyl alcohol, isostearyl alcohol,
Oleyl alcohol, 2-hexyldecanol, 2-octyldodecanol and the like can be mentioned. Among them, myristyl alcohol, cetyl alcohol, stearyl alcohol, cetostearyl alcohol, and behenyl alcohol, which are linear higher saturated alcohols, are particularly preferable from the viewpoint of emulsion stability. These higher alcohols may be used alone or in combination of two or more.

Further, other additional components include natural or synthetic polymers such as alkyl glyceryl ethers such as batyl alcohol and chimyl alcohol, gum arabic, sodium alginate, xanthan gum, cellulose derivatives, cross-linked polyacrylic acid, and diethanolamide oleate. De, amides such as lauric acid diethanolamide, stearyltrimethylammonium chloride, cationic surfactants such as distearyldimethylammonium, anionic surfactants such as polyoxyethylene lauryl ether sulfate and polyoxyethylene lauryl sulfosuccinate; Amphoteric surfactants such as laurylhydroxysulfobetaine and lauryldimethylcarbobetaine, polyoxyethylene alkyl ether, polyoxyethylene alkylphenyl ate Nonionic surfactants such as phenol, preservatives such as paraben, chelating agents such as EDTA-Na, phenacetin, EDTA, 8-hydroxyquinoline, acetanilide, sodium pyrophosphate, barbituric acid, uric acid, tannic acid, paraben, etc. Stabilizers, pH adjusters such as phosphoric acid, citric acid, sulfuric acid, acetic acid, lactic acid, tartaric acid, etc., plant extracts, crude drug extracts, vitamins, natural pigments,
At least one selected from fragrances, pigments, ultraviolet absorbers, etc., and those listed in “Quasi-drug raw material standards” (published in June 1991, Yakuji Nippo) may be blended in the first agent.

The dosage form of the first part is not particularly limited. However, in the case of a creamy dosage form, the oil component and a higher alcohol are blended to form an oil-in-water type (O / W).
Type) Emulsion. In that case, the blending amounts of the oil component and the higher alcohol are each preferably 1 to 20% by weight of the first agent, and more preferably 3 to 12% by weight. When the first agent is an oil-in-water emulsion, its viscosity is 10,000.
~ 50,000 mPa · s (mPa · s) is preferred. If it is less than 10,000 millipascal seconds, the mixture viscosity becomes small, and when applied to hair, dripping or scattering occurs. Conversely, if it is greater than 50,000 millipascal seconds, the mixing properties of the first and second agents decrease.

[Second Agent] The second agent in the present embodiment contains an oxidizing agent and the like. Examples of the oxidizing agent include hydrogen peroxide, percarbonate, perborate, persulfate, sodium peroxide, potassium peroxide, magnesium peroxide, barium peroxide, calcium peroxide, strontium peroxide, and sulfate. Hydrogen peroxide adduct of phosphate, hydrogen peroxide adduct of pyrophosphate, urea peroxide, melamine peroxide, etc., of which hydrogen peroxide is preferred. These oxidants may be used alone or in combination of two or more.

The compounding amount of the oxidizing agent is 0.1 to 9.
0% by weight is preferable, and 2.0 to 6.0% by weight is more preferable. If the amount is less than 0.1% by weight, a sufficient oxidation effect cannot be obtained, and if the amount exceeds 9.0% by weight, hair may be damaged. When it is set in the range of 2.0 to 6.0% by weight, it is possible to suppress the possibility of causing damage to the hair while exhibiting a sufficient oxidation effect.

Further, as the other additive component, at least one selected from the other additive components that can be blended in the first agent may be blended in the second agent. Although the viscosity of the second agent is not particularly limited, when the first agent is an oil-in-water emulsion and its viscosity is 10,000 to 50,000 millipascal seconds, the viscosity of the second agent is 1,000 millipascals. Preferably less than a second. If it is longer than 1000 millipascal seconds, the mixing property between the first and second agents may be reduced. In this case, the dosage form of the second agent is preferably a solution or an emulsion.

The pH of the second agent is preferably 2 to 6,
3 to 5 are more preferred. Next, the operation of the hair cosmetic composition configured as described above will be described. The hair cosmetic composition of the present embodiment is stored in a state where the first agent and the second agent are filled in different containers, respectively, until use. In this case, usually, the second agent is filled into the applicator and the first agent is filled.
The agent is filled in a container other than the applicator, such as a tube container. The applicator may be a comb-integrated applicator or a nozzle-type applicator. Further, an applicator including a double container including an inner container and an outer container, or an applicator including a single container including only an outer container without an inner container may be used. Then, the user puts the first in the applicator at the time of use.
By pouring the agent and shaking the applicator, the first agent and the second agent are mixed in the applicator to obtain the hair cosmetic composition of the present embodiment.

According to the above-described embodiment, the following effects can be obtained. (1) The ratio of the specific gravity of the first agent to that of the second agent is 0.98 to 1.10.
And because the difference in specific gravity between the first agent and the second agent is small,
When the first agent is placed in the applicator containing the second agent, the first agent and the second agent are less likely to be separated into upper and lower layers. Therefore, the mixing property between the first agent and the second agent can be improved.

(2) In the conventional hair cosmetic composition, the ratio of the specific gravity of the first agent to the second agent is about 0.96, and the specific gravity of the first agent is smaller than that of the second agent. When one agent is placed in the applicator containing the second agent, the first agent separates into an upper layer and the second agent separates into a lower layer. For this reason, when the first agent separated into the upper layer contains ammonia or ammonium salt as an alkaline agent, there is a problem that an ammonia odor is generated and the user is extremely uncomfortable. However, in the case of the hair cosmetic composition of the present embodiment, the ratio of the specific gravities of both is 0.98 to 1.10, and the specific gravity of the second agent is smaller than that of the first agent, Even when the specific gravity is smaller, the difference in specific gravity between the two is smaller than in the related art. For this reason, it is possible to suppress the first agent from being separated into the upper layer as in the related art. Therefore, it is possible to suppress the generation of the ammonia odor caused by the ammonia or ammonium salt contained in the first agent, and to suppress the possibility of giving the user discomfort.

(3) Since the first agent and the second agent are excellent in mixing properties, the first agent can be prepared without providing a head space (space above the container) in the applicator serving as a place for mixing the two. And the second agent can be easily mixed.
For this reason, it is possible to fill the applicator with more hair cosmetic composition by reducing the head space. It is also possible to reduce the headspace to reduce the overall size of the applicator. When the configuration is changed so as to suppress the size of the applicator, if the diameter of the grip portion is configured to be small, the applicator can be easily held, so that usability can be improved.

(4) In the conventional hair cosmetic composition, the first
There is a problem that the agent adheres to the inner surface of the applicator and does not disperse well with the second agent. This was because the first agent poured into the applicator was directly laminated on the second agent and directly adhered to the inner surface of the applicator. However, in the case of the present embodiment, the specific gravity of the second agent is smaller than that of the first agent, or even if the specific gravity of the first agent is smaller, the difference in specific gravity between the two becomes smaller than in the conventional case. Therefore, when the first agent is poured into the applicator, it behaves as if it sinks into the second agent. For this reason, it is possible to suppress the possibility that the adhesive is directly attached to the inner surface of the applicator.

(5) By making the first agent an oil-in-water emulsion, the feel and dyeing properties during use can be further improved. (6) By setting the viscosity of the first agent to 10,000 to 50,000 millipascal seconds and the viscosity of the second agent to less than 1,000 millipascal seconds, the mixing property between the first agent and the second agent can be improved. Thus, a hair cosmetic composition having an appropriate mixed viscosity can be obtained. Therefore, even when, for example, a comb-integrated applicator is used after being filled, the hair cosmetic composition is less likely to drip or scatter. Further, the ratio of the viscosity of the first agent to that of the second agent is 2
By setting it in the range of 0 to 500, a hair cosmetic composition having a more appropriate mixed viscosity can be obtained.

(Second Embodiment) Hereinafter, a second embodiment in which the present invention is embodied in a hair cosmetic composition used as a hair bleaching agent.
The embodiment will be described focusing on the differences from the first embodiment.

[First Agent] The first agent in the present embodiment is the same as the first agent in the first embodiment except that a dye such as an oxidation dye intermediate is removed.

[Second Agent] The same second agent as in the first embodiment is used as the second agent in the present embodiment.

(Third Embodiment) Hereinafter, a third embodiment in which the present invention is embodied in a hair cosmetic composition used as a destaining agent will be described focusing on parts different from the first embodiment.

The hair cosmetic composition according to the present embodiment comprises:
It is obtained by mixing three types of agents, a first agent as a first agent, a second agent as a second agent, and a third agent as another agent. In addition, the hair cosmetic according to the present embodiment includes a first agent, a second agent, and a third agent.

[First Agent] The first agent in the present embodiment is the same as the first agent in the first embodiment except that a dye such as an oxidation dye intermediate is removed.

[Second Agent] The same second agent as in the first embodiment is used as the second agent in the present embodiment.

[Third Agent] The third agent in this embodiment contains an oxidation promoter and the like. Examples of the oxidation promoter include persulfate, sodium peroxide, potassium peroxide, magnesium peroxide, barium peroxide, calcium peroxide, strontium peroxide, hydrogen peroxide adduct of sulfate, and peroxide of phosphate. Examples thereof include a hydrogen oxide adduct, a hydrogen peroxide adduct of a pyrophosphate, and melamine peroxide. Among them, sodium persulfate, potassium persulfate, and ammonium persulfate are preferable. These oxidation promoters may be used alone or in combination of two or more. The compounding amount of this oxidation promoter is preferably from 10 to 90% by weight of the third agent, more preferably from 20 to 80% by weight.

The hair cosmetic composition according to the present embodiment comprises:
Each of the first to third agents is stored in a separate container in a state of being filled until use. And when the user uses it,
-By mixing the third agent, the hair cosmetic composition of the present embodiment is obtained.

(Fourth Embodiment) Hereinafter, a fourth embodiment in which the present invention is embodied in a hair cosmetic composition used as an exothermic two-bath type perm agent (hereinafter referred to as a perm agent) prepared at the time of use will be described. The following description focuses on the differences from the first embodiment.

The hair cosmetic composition according to the present embodiment comprises:
It is obtained by mixing two agents, "first agent (1)" as the first agent and "first agent (2)" as the second agent. In addition, in this perm agent, this hair cosmetic composition which is a mixture of the first agent (1) and the first agent (2) is referred to as a first agent, and is otherwise referred to as a second agent. It has the agent of. In addition, the hair cosmetic composition according to the present embodiment includes the first agent (1), the first agent (2), and the second agent.

[First Agent (1)] The first agent (1) in this embodiment contains a reducing agent, an alkali agent and the like.

Examples of the reducing agent include thioglycolic acid salts such as thioglycolic acid, ammonium thioglycolate, sodium thioglycolate and monoethanolamine thioglycolate; esters of thioglycolic acid such as glycerin thioglycolate; and cysteine. And its hydrochloride; cysteine salts such as N-acetyl-L-cysteine; mercapto compounds such as thioglycerol, thiolactic acid, thiomalic acid, and cysteamine; sulfites such as sulfurous acid, ammonium sulfite, and sodium sulfite; ammonium bisulfite; Bisulfites such as sodium hydrogen,
And thiosulfates such as thiosulfate and sodium thiosulfate. These reducing agents may be used alone or in combination of two or more.

The compounding amount of the reducing agent is 0.1% of the first agent (1).
It is preferably from 01 to 20% by weight, more preferably from 1 to 10% by weight. If the amount is less than 0.01% by weight, it may not be possible to form a sufficient wave or straighten the hair. Conversely, if it exceeds 20% by weight, excessive reduction may cause damage to the hair.

Examples of the alkaline agent include ammonia, alkanolamines (monoethanolamine, diethanolamine, triethanolamine, etc.) and organic amines (2-amino-2-methyl-propanol, 2-ethanolamine).
Amino-2-methyl-propanediol, isopropanolamine, diisopropanolamine, guanidine carbonate, guanidine hydrochloride, guanidine sulfate, etc., basic amino acids (arginine, lysine, etc.), inorganic alkalis (sodium hydroxide, potassium hydroxide, hydroxide) Lithium and the like, and salts thereof. These alkali agents may be blended alone or in combination of two or more. The first agent (1) may have a buffering action by combining two or more alkaline agents in an appropriate combination. The amount of the alkaline agent is preferably 0.01 to 20% by weight of (1) of the first agent, and 20% by weight.
If it exceeds, the risk of causing damage to the hair increases.
In addition, the pH of the first agent (1) is adjusted to a range of 4.5 to 9.5.

[First Agent (2)] The first agent (2) in the present embodiment contains an oxidizing agent and the like. Examples of the oxidizing agent include hydrogen peroxide. The compounding amount of the oxidizing agent is preferably 0.01 to 3.0% by weight of (2) of the first agent.

The mixing ratio of (1) of the first agent and (2) of the first agent can be arbitrarily set, but the amount of the oxidizing agent of (2) of the first agent during mixing is (1). It is necessary to set the compounding amounts and the mixing ratios of the oxidizing agent and the reducing agent so as to be equal to or less than the amount of the reducing agent of the above).

[Second Agent] The second agent in this embodiment contains an oxidizing agent and the like. As this oxidizing agent,
Bromates such as sodium bromate and potassium bromate; hydrogen peroxide; perborate; and sodium percarbonate. These oxidizing agents may be used alone or in combination of two or more. The amount of the oxidizing agent is preferably 0.1 to 15% by weight of the second agent, and 1 to 10% by weight.
Is more preferred. If the amount is less than 0.1% by weight, a sufficient oxidation effect cannot be obtained, while if it exceeds 15% by weight, hair may be damaged.

The hair cosmetic composition according to the present embodiment comprises:
The first agent (1) and the first agent (2) are stored in different containers, respectively, in different containers until use. The user mixes the first agent (1) and the first agent (2) at the time of use, applies the obtained hair cosmetic composition (first agent) to the hair, and then further applies the second agent. .

According to the present embodiment, the specific gravity of the first agent (2) is smaller than that of the first agent (1) or the first agent (1).
Even when the specific gravity is smaller, the difference in specific gravity between the two is smaller than in the conventional case. Therefore, the first agent (1)
When the first agent (1) and the first agent (2) are mixed, the generation of a mercaptan odor due to thioglycolic acid or the like can be prevented even when thioglycolic acid or the like is contained as a reducing agent. Can be suppressed.

[0062]

Next, the embodiment will be described more specifically with reference to examples and comparative examples. (Examples 1 to 5 and Comparative Examples 1 to 3) A comb is integrated with an applicator, a second agent is filled therein, and the first agent is poured therein. Was mixed to obtain a hair cosmetic composition (oxidative hair dye).

At this time, the ratio of the specific gravities of the first and second agents, the ratio of the viscosities of the first and second agents, the mixed viscosity (the viscosity of the hair cosmetic composition), and the ratio of the first and second agents The mixing property, the odor at the time of mixing, the dripping, and the scattering were measured and evaluated. Table 3 shows the results. Tables 1 and 2 show the compositions and the like of the first and second agents used in each example. Incidentally, the first agent of Examples 1 to 4 and Comparative Example 1 was in the form of a cream in an oil-in-water emulsion, and the first agent of Example 5 and Comparative Example 3 and the second agent of each example were in the form of a solution. Form, Comparative Example 2
Is in the form of an emulsion. <Evaluation Criteria> Mixability: ◎ (good), ○ (somewhat good), Δ (somewhat bad), × (bad) Odor… ◎ (none), ○ (almost no), △ (somewhat), × ( Yes) Sagging… ◎ (No), ○ (Almost), △ (Somewhat), × (Yes)

[0064]

[Table 1]

[0065]

[Table 2]

[0066]

[Table 3] Next, technical ideas that can be grasped from the embodiment will be described below.

A hair cosmetic comprising at least two agents containing at least both a first agent containing at least one of an alkali agent and a reducing agent and a second agent containing an oxidizing agent, The ratio of the specific gravity of the first agent and the second agent (first
The specific gravity of the second agent / the specific gravity of the second agent) is 0.98 to 1.10. With this configuration, the mixing property between the first agent and the second agent can be improved.

[0068]

Since the present invention is configured as described above, it has the following effects. According to the first aspect of the present invention, the mixing property between the first agent and the second agent can be improved.

According to the second aspect of the present invention, the effects of the first aspect of the present invention can be exhibited in an oxidative hair dye or a hair bleaching agent. According to the third aspect of the present invention, in addition to the effects of the first or second aspect of the invention, it is possible to improve the feel and dyeability during use.

According to the invention set forth in claim 4, according to claim 3,
In addition to the effects of the invention described in the above, in addition to being able to further improve the mixability of the first agent and the second agent, and exhibiting an appropriate viscosity with little risk of dripping or scattering at the time of use Can be.

According to the invention described in claim 5, according to claim 3,
Or, in addition to the effect of the invention according to claim 4, it is possible to further improve the mixing property of the first agent and the second agent, and to reduce the possibility of dripping or scattering during use. High viscosity.

According to the invention set forth in claim 6, according to claim 1,
In addition to the effects of the invention according to any one of claims 5 to 5, the specific gravity of the first agent can be easily adjusted without reducing the effects on hair such as dyeing and decolorization.

According to the invention of claim 7, according to claim 1,
In addition to the effects of the invention according to any one of claims 6 to 6, after the first agent and the second agent are mixed, the mixture can be easily applied to hair.

According to the invention of claim 8, according to claim 7,
In addition to the effects of the invention described in (1), the mixing property of the first agent and the second agent can be improved even in an applicator where it is difficult to take a large internal space.

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Claims (8)

[Claims] 1. A hair cosmetic prepared by mixing two or more agents containing at least both a first agent containing at least one of an alkaline agent and a reducing agent and a second agent containing an oxidizing agent. The composition, wherein the ratio of the specific gravity of the first agent to the specific gravity of the second agent (the specific gravity of the first agent / the specific gravity of the second agent) is 0.98 to 1.
A hair cosmetic composition, which is 10. 2. The hair cosmetic composition according to claim 1, which is an oxidative hair dye or a hair bleaching agent. 3. The method according to claim 1, wherein the first agent is an oil-in-water type (O / W type).
The hair cosmetic composition according to claim 1 or 2, which is an emulsion. 4. The viscosity of the first agent is 10,000 to 50.
The hair cosmetic composition according to claim 3, wherein the composition is 000 millipascal seconds (mPa · s) and the viscosity of the second agent is less than 1000 millipascal seconds. 5. The method according to claim 3, wherein the ratio of the viscosity of the first agent to the viscosity of the second agent (the viscosity of the first agent / the viscosity of the second agent) is 20 to 500. Hair cosmetic composition. 6. The first agent has a specific gravity of 1.20-1.
The hair cosmetic composition according to any one of claims 1 to 5, wherein at least one selected from a polyhydric alcohol of 80 and a saccharide having a specific gravity of 1.20 to 1.80 is blended as a specific gravity adjuster. 7. The hair cosmetic composition according to claim 1, wherein the first agent and the second agent are mixed in an applicator. 8. The hair cosmetic composition according to claim 7, wherein the applicator includes a double container comprising an inner container and an outer container.