JP2023110702A - Powdery hair dye composition - Google Patents

Abstract

To solve the problems peculiar to a powdery hair dye, such as operability of a powdery hair dye composition, solubility upon mixing with a liquid medium, and securing of proper viscosity after mixing with the liquid medium.SOLUTION: A powdery hair dye composition includes (A) percarbonate and (B) oxidation dye, and further includes (C) guar gum and (D) sucrose fatty acid ester, with the mass ratio of the content of the (D) sucrose fatty acid ester to the (C) guar gum content, (D)/(C), of 0.01-0.6.SELECTED DRAWING: None

Description

TECHNICAL FIELD The present invention relates to a powdery hair dye composition containing a percarbonate and an oxidation dye, and more particularly to a powdery hair dye composition in which a new component composition has been found to solve the problems peculiar to powdery hair dyes. .

The hair dye composition dyes the hair by oxidizing and polymerizing the oxidation dye in the hair to develop a color. Many hair dye compositions are composed of a liquid first agent containing an oxidation dye and an alkaline agent and a liquid second agent containing an oxidizing agent, but powder hair dyes are also provided. It is The powdered hair dye is composed of an oxidation dye, an alkali agent, an oxidizing agent, etc., in the form of powder (solid), so that it can be composed as a one-part formula. Offer to

JP 2006-273759 A JP 2010-260837 A

Patent Literature 1 above discloses that starch is added to a powdered hair dye to maintain the stability of a solid oxidizing agent (such as sodium percarbonate) before and after storage. In the above-mentioned Patent Document 2, by blending a percarbonate with a specific dye intermediate such as 5-aminoorthocresol sulfate, which is an oxidation dye, the hair is dyed with excellent hair dyeing power and a vivid warm color tone. Disclose what you can do.

By the way, a powder hair dye composition is easier to prepare than a liquid two-agent hair dye, and is lightweight and easy to pack because it is a one-agent type, and the transportation and storage costs are low. , ease of use by the user, and other advantages.
However, due to the fact that it is in the form of a powder, there are also unique problems such as ensuring the fluidity of the powder raw material during production and ensuring the solubility of the powder raw material in a liquid medium, which is a prerequisite for viscosity adjustment during use. I'm holding Problems peculiar to these powdered hair dyes often affect the hair dyeing effect, which is the intrinsic utility value of hair dyes.

According to the research of the inventor of the present application, a general-purpose lubricant (dispersant) that is blended to ensure the fluidity of the powder raw material exhibits an excellent dispersing effect of the powder, but also has water repellency. Some of them form so-called lumps when mixed with a liquid medium, which hinders the solubility of the powdered hair dye. In addition, general-purpose thickeners that are blended to ensure the proper viscosity of the mixed liquid with the liquid medium have a rapid thickening effect, which is different from the above water repellency when mixed with the liquid medium. Some form lumps. In any of these cases, the dissolution of the powdered hair dye becomes insufficient due to the formation of clumps, which may lead to a decrease in hair dyeing power in the oxidative hair dyeing treatment and poor hair dyeing such as uneven dyeing.
In addition, conventional powdered hair dye compositions contain many petroleum-derived components, which are not necessarily preferable.

Therefore, the present invention provides a powder hair dye that has the fluidity of the powder raw material, the solubility when mixed with the liquid medium, and the operability and level dyeing property based on ensuring the proper viscosity after mixing with the liquid medium. The technical problem to be solved is to respond to the unique problem.

In the following, the content notation of the component in mass % indicates the content in the powder hair dye composition. However, since it can be mixed with a liquid medium such as water at any mass ratio at the time of use, the content at the time of mixing, which is an important prescription item for (A) percarbonate, (B) oxidation dye, (C) guar gum, etc. cannot be calculated based on the content in the powder hair dye composition. Therefore, all descriptions of the contents of the components in the powdered hair dye composition are based on the premise that the powdered hair dye composition is mixed with a liquid medium in an amount 10 times the mass ratio at the time of use. However, this description is not meant to limit the mixing ratio of the powdered hair dye composition and the liquid medium at the time of use.

(Configuration of the first invention)
The configuration of the first invention of the present application for solving the above problems is a powdery hair dye composition containing (A) a percarbonate and (B) an oxidation dye, further comprising (C) guar gum and (D) ) A powder hair dye containing a sucrose fatty acid ester and having a mass ratio (D) / (C) of the content of (D) sucrose fatty acid ester to (C) guar gum in the range of 0.01 to 0.6 agent composition.
In the above first invention, (A) percarbonate is blended as an oxidizing agent, (C) guar gum is blended as a thickening agent, and (D) sucrose fatty acid ester is blended as a lubricant (dispersant). .

(Configuration of the second invention)
The configuration of the second invention of the present application for solving the above problems is the powder hair dye composition according to the first invention, wherein the content of (C) guar gum is 5 to 20% by mass, and (D) sucrose The content of fatty acid ester is 0.2 to 5% by mass.

(Configuration of the third invention)
The configuration of the third invention of the present application for solving the above problems is that the powdery hair dye composition according to the first invention or the second invention further contains any one or more of the following (E) to (G). do.
(E) L-threonine (F) lactose (G) starch In the above third invention, (E) L-threonine is used as a chelating agent, (F) lactose is used as an excipient, and (G) starch is used as a powder component. Each is added as a stabilizer.

(Effect of the first invention)
In the first invention, (C) guar gum is contained as a thickening agent. Guar gum is nonionic and has a slow thickening rate compared to, for example, the commonly used anionic thickening agent carboxymethylcellulose. As a result, it was found that the formation of lumps during mixing with the liquid medium can be avoided, and thus defective hair dyeing such as lack of uniform dyeing can be prevented. It is comparable to carboxymethyl cellulose in terms of the basic effect of blending as a thickener, such as the operability of the powdered hair dye and the improvement of stability over time.
Next, in the first invention, (D) sucrose fatty acid ester is contained as a lubricant. As a lubricant for powdered hair dyes, for example, magnesium stearate, which has a good dispersing effect, is widely used. It was found that the formation of However, the sucrose fatty acid ester has good water solubility and can maintain the excellent solubility of the powdered hair dye, and exhibits a dispersing effect comparable to that of magnesium stearate, so that the hair dye can be applied to the hair well. It is possible to realize excellent hair dyeing properties based on applicability and even dyeing properties.

Furthermore, the mass ratio (D)/(C) of the content of (D) sucrose fatty acid ester to (C) guar gum in the powdered hair dye composition is one of the major characteristics of the present invention. That is, with a conventional two-part liquid hair dye, on the premise of securing hair dyeing power, consideration is given to operability such as prevention of dripping from the hair during dyeing and good applicability to the hair. However, in powder hair dyes, in addition to securing the hair dyeing power and operability, it is necessary to consider the fluidity of the powder raw material during production and the solubility of the powder raw material in a liquid medium during use. be. Moreover, there was a trade-off relationship in that if the fluidity of the raw powder material is improved, the solubility in the liquid medium is deteriorated, and if the solubility in the liquid medium is improved, the fluidity of the powder raw material is deteriorated. .

The inventors of the present application found that the solution to this problem is to adjust the mass ratio (D)/(C) of the content of (D) sucrose fatty acid ester to (C) guar gum. When this mass ratio is within the range specified in the first invention, both the fluidity of the powdered hair dye composition during production and the solubility of the powdered hair dye composition in a liquid medium during use are satisfactorily compatible. do. If this mass ratio does not reach the lower limit of the range specified in the first invention, the powder hair dye composition lacks fluidity, and if this mass ratio exceeds the upper limit of the range specified in the first invention. lacks the solubility of powdered hair dye compositions in liquid media.
As a matter of course, if the content of component (C), which is a thickening agent, is too low or too high, the viscosity of the mixture of the powdered hair dye composition and the liquid medium will be insufficient or excessive. It is not a matter of the mass ratio (D)/(C), but the operability during the hair dyeing process is impaired. Also, when the content of component (D), which is a lubricant, is too low or too high, the fluidity of the powdered hair dye composition is impaired, not the problem of the mass ratio (D)/(C). Alternatively, the solubility is impaired due to excess lubricant.
All of the various problems described above ultimately lead to dissatisfaction with the hair dyeing effect of the hair dye.

(Effect of the second invention)
The content of (C) guar gum in the powder hair dye composition is not particularly limited, but is preferably 5 to 20% by mass, more preferably 7 to 18% by mass, and particularly preferably 10 to 15% by mass.
Also, the content of (D) sucrose fatty acid ester in the powder hair dye composition is not particularly limited, but is preferably 0.2 to 5% by mass, more preferably 0.6 to 4% by mass, and particularly preferably 0% by mass. .7 to 3% by mass.

(Effect of the third invention)
The powder hair dye composition preferably further contains at least one of (E) L-threonine, (F) lactose, and (G) starch.

(E) L-threonine is particularly excellent in the effect of chelating copper ions, and its incorporation improves the finish feel of the powdered hair dye. In addition, organic chelating agents are preferable, whereas many commonly used chelating agents are derived from petroleum.
(F) Lactose is blended in place of sodium sulfate, which is generally blended as an excipient for powdered hair dyes. Lactose has the effect of preventing moisture absorption of the powdered hair dye composition, and can suppress deterioration of flowability due to moisture absorption, deterioration of storage stability of oxidation dyes, and the like. Lactose is also preferable because it is an organic compound, unlike mineral-derived sodium sulfate.
By containing (G) starch in the powdered hair dye, the oxidizing agent is stabilized, and as a result, changes in hair color tone before and after storage of the powdered hair dye are suppressed.

Next, embodiments of the present invention, including the best mode, will be described. The technical scope of the invention is not limited by these embodiments.
[Powder hair dye composition]
The powder hair dye composition of the present invention contains (A) percarbonate, (B) oxidation dye, (C) guar gum and (D) sucrose fatty acid ester, and (D) sucrose fatty acid for (C) guar gum The mass ratio (D)/(C) of the ester content is within the range of 0.01 to 0.6.
This mass ratio (D)/(C) is more preferably in the range of 0.04 to 0.5, more preferably in the range of 0.05 to 0.4.
The powder hair dye composition preferably further contains at least one of (E) L-threonine, (F) lactose and (G) starch. In addition, as will be described later, it contains other ingredients necessary or beneficial as an oxidative hair dye and various optional ingredients.

The powder hair dye composition is usually a one-part type, but may be a two-part or more multi-part type. When used, the powdered hair dye composition is mixed with a liquid medium such as water to form a hair dye application liquid, which is applied to the hair. The mixing ratio of the powdery hair dye composition to the liquid medium at the time of use is not limited, and can be, for example, a mass ratio of 1:10, but is not limited to this, and can be any mass ratio such as 1:5. Can be mixed.

[Essential components of powder hair dye composition]
<(A) Percarbonate>
Percarbonate is an oxidizing agent, and has the action of oxidizing oxidation dyes to develop color and the action of decomposing melanin inside the hair. Specifically, for example, sodium percarbonate, potassium percarbonate and the like are exemplified, and among these, sodium percarbonate is preferred.

The percarbonate content in the powder hair dye composition is not particularly limited, but is preferably 15 to 60% by mass, more preferably 20 to 50% by mass, and particularly preferably 25 to 40% by mass. . When the percarbonate content is 15% by mass or more, the effect of the present invention of suppressing changes in dyed hair color tone during long-term storage is more effectively exhibited, and the fluidity of the powdered hair dye composition is also improved. . On the other hand, when the content of percarbonate is 60% by mass or less, an effect is obtained that hair is less likely to be damaged.

The powdery hair dye composition of the present invention may contain any oxidizing agent in addition to the above (A) percarbonate. Examples of the arbitrary oxidizing agent include various peroxide salts, hydrogen peroxide adducts of various sulfates, hydrogen peroxide adducts of various phosphates, and hydrogen peroxide additions of various pyrophosphates. urea peroxide, melamine peroxide, various perborates, various perbromides, various permanganates, and the like.

<(B) Oxidation dye>
The oxidation dye (A) is a dye that undergoes oxidation polymerization with a percarbonate to develop a color. Oxidation dyes include a dye intermediate and a coupler. A dye intermediate is a substance that polymerizes and develops color by oxidation of itself, and a coupler is a substance that produces various color tones by combining with a dye intermediate.

Dye intermediates are dye precursors that are primarily o- or p-phenylenediamines or aminophenols, and are usually colorless or weakly colored compounds themselves.

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 are exemplified.
One or more dye intermediates can be selected and used according to the desired hair color tone. The total content of dye intermediates is not particularly limited, but is, for example, 1 to 30% by mass, more preferably 5 to 20% by mass in the powder hair dye composition.

Couplers mainly include m-diamines, aminophenols and diphenols, and specific examples include m-methaminophenol, 5-aminoorthocresol, resorcinol, 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, Examples include 3,3′-iminodiphenyl, 1,5-dihydroxynaphthalene, tannic acid, 1-hydroxyethyl-4,5-diaminopyrazole, and salts such as sulfates and hydrochlorides thereof.

One or more couplers can be selected and used according to the desired hair color tone. The total content of the coupler is not particularly limited, but is, for example, 0.1 to 20% by mass, more preferably 0.5 to 15% by mass, particularly preferably 1 to 10% by mass in the powder hair dye composition. .

<(C) guar gum>
Guar gum, which is one of water-soluble polymer compounds, is blended as a thickening agent in the present invention. Guar gum is non-ionic, and has the advantage of exhibiting a thickening effect more slowly when dissolved in water than ionic polymer compounds such as CMC (carboxymethyl cellulose). In addition, the thickening effect of guar gum is excellent in viscosity stability after storage over time. The preferred content of (C) guar gum in the powdery hair dye composition is as explained in relation to the second invention.

<(D) Sucrose fatty acid ester>
Sucrose fatty acid ester, also called sugar ester, is a type of ester-based nonionic surfactant, and is blended as a lubricant (dispersant) in the present invention. Sucrose stearate is particularly preferred.
As described above in the "Effect of the first invention" column, (D) sucrose fatty acid ester has two properties in relation to (C) guar gum: the fluidity of the powder composition and the solubility in a liquid medium. It is greatly involved in issues that are not found in hair dyes. Specifically, it is a component directly related to the mass ratio (D)/(C) of the first invention together with guar gum, and ensures fluidity of the powder composition and does not inhibit solubility in a liquid medium. The preferred content of (D) sucrose fatty acid ester in the powder hair dye composition is as described in relation to the second invention, and the preferred range of the content mass ratio (D)/(C) is as described in relation to the first invention. is.

[Important components of powder hair dye composition]
<(E) L-threonine>
L-threonine, which is one of the so-called essential amino acids having a hydroxyl group in the molecule, is blended as a chelating agent in the present invention. L-threonine as a chelating agent is suitable for trapping copper ions and is suitable for use in regions with so-called hard water.
Suitable content of L-threonine in the powder hair dye composition is not particularly limited, but is, for example, 1 to 5% by mass, more preferably 1.2 to 4.5% by mass, particularly preferably 1.5 to 4% by mass. % by mass.

<(F) Lactose>
Lactose is a type of sugar contained in milk and the like, and is blended as an excipient in the present invention. Among lactose, lactose consisting of or containing anhydrous lactose is more preferred. Suitable lactose content in the powder hair dye composition is not particularly limited, but is, for example, 0.01 to 70% by mass, more preferably 5 to 60% by mass, and particularly preferably 10 to 50% by mass.

<(G) Starch>
Starch is a natural polymer compound collected from various plants, and is blended as a stabilizer in the present invention. Although there are many types of starch, potato starch is particularly preferred. Stabilization of dyed hair color tone before and after storage of the powdered hair dye composition, and application operability to the hair after mixing the powdered hair dye composition with a liquid medium by adding starch to the powdered hair dye composition improvement can be expected.
Although the suitable range of starch content in the powder hair dye composition is not particularly limited, it is, for example, 3 to 50% by mass, more preferably 7 to 40% by mass, and particularly preferably 10 to 30% by mass.

<Alkaline agent>
Alkaline agents have the effect of swelling hair and promoting the penetration of dyes and oxidizing agents. Examples of alkaline agents include silicates, carbonates, hydrogen carbonates, metasilicates, phosphates, basic amino acids, hydroxides and the like. Specifically, examples of silicates include sodium silicate, potassium silicate, etc. Examples of carbonates include sodium carbonate, ammonium carbonate, magnesium carbonate, guanidine carbonate, etc. Examples of hydrogencarbonates include sodium hydrogencarbonate. , ammonium hydrogen carbonate and the like, examples of metasilicate include sodium metasilicate and potassium metasilicate, and examples of phosphate include primary ammonium phosphate, secondary ammonium phosphate, disodium monohydrogen phosphate, Examples include trisodium phosphate, examples of basic amino acids include arginine, lysine and salts thereof, and examples of hydroxides include calcium hydroxide and magnesium hydroxide.
Although the content of the alkaline agent in the powder hair dye composition is not limited, it is 5 to 50% by mass, more preferably 10 to 40% by mass, and particularly preferably 15 to 30% by mass.

<Chelating agents, excipients, and stabilizers other than (E) to (G)>
The powdered hair dye composition contains (E) various chelating agents other than L-threonine, (F) various excipients other than lactose, and (G) other than starch, as long as the effects of the present invention are not substantially impaired. can contain various stabilizers.

[Optional components of powder hair dye composition]
Components that the powder hair dye composition may optionally contain are described below. The content of the optional component is appropriately determined within a range that does not substantially impair the effects of the present invention, and is not particularly limited.

<Water-soluble polymer compound>
The powder hair dye composition of the present invention has the action and effect described in the column "Effect of the first invention" for (C) guar gum and the action and effect described in the column "Effect of the third invention" for (G) starch. Water-soluble polymer compounds other than (C) guar gum and (G) starch may be contained within a range that does not inhibit the Examples of these water-soluble polymer compounds include alginic acid, carrageenan, and seaweed extracts such as agar. Seed mucilages such as konjac mannan, dextrin, and locust bean gum are also exemplified. Sap mucilages such as gum arabic, gum karaya, and gum tragacanth are also exemplified. Plant proteins such as wheat protein and soybean protein are also exemplified. Animal proteins such as albumin, gelatin, and collagen are also exemplified. Mucilages produced by microorganisms such as curdlan, xanthan gum and dextran are also exemplified. Mucopolysaccharides such as chitosan and hyaluronic acid are also exemplified.

Examples of semisynthetic water-soluble polymer compounds include methylcellulose, ethylcellulose, hydroxypropylcellulose, carboxymethylcellulose, methylhydroxypropylcellulose, cationized cellulose, and alginates (eg, sodium alginate).

Examples of synthetic water-soluble polymer compounds include polyvinyl alcohol, polyvinylpyrrolidone, carboxyvinyl polymer, polyacrylamide, polyethylene oxide, acrylic acid/alkyl acrylate copolymer, and the like.

<Direct dye>
Examples of direct dyes include acid dyes, basic dyes, natural dyes, nitro dyes, HC dyes and disperse dyes. The direct dyes may be blended singly or in combination.

<Oil component>
Examples of oily components include higher alcohols, 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.

Higher alcohols include cetyl alcohol (cetanol), stearyl alcohol, cetostearyl alcohol, oleyl alcohol, arachyl alcohol, behenyl alcohol, lauryl alcohol, and myristyl alcohol.

Fats and oils are triesters of fatty acids and glycerin, and include olive oil, rosehip oil, camellia oil, shea butter, macadamia nut oil, almond oil, tea seed oil, sasanqua oil, safflower oil, and sunflower oil.

Hydrocarbons include liquid paraffin, paraffin, microcrystalline wax, petrolatum, isoparaffins, α-olefin oligomers, synthetic squalane, squalene, hydrogenated squalane, limonene, and turpentine oil.

Higher fatty acids include lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, isostearic acid, hydroxystearic acid and the like.

Esters include diisopropyl adipate, 2-hexyldecyl adipate, myristyl myristate, cetyl octanoate, isononyl isononanoate, 2-ethylhexyl palmitate, and cetyl ethylhexanoate.

Silicone oils include dimethylpolysiloxane (INCI name: dimethicone), dimethylpolysiloxane with hydroxyl end groups (INCI name: dimethiconol), methylphenylpolysiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, polyether-modified silicone and the like.

<Surfactant>
Surfactants include nonionic surfactants, cationic surfactants, anionic surfactants and amphoteric surfactants. In the following description, POE denotes polyoxyethylene chains and POP denotes polyoxypropylene chains.

Examples of nonionic surfactants include POE alkyl ethers, POE alkylphenyl ethers, POE/POP alkyl ethers, POE sorbitan fatty acid esters, POE mono fatty 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 are included.

Examples of cationic surfactants include monoalkyl-type quaternary ammonium salts, dialkyl-type quaternary ammonium salts, trialkyl-type quaternary ammonium salts, benzalkonium-type quaternary ammonium salts, monoalkyl ether-type quaternary ammonium salts, and the like. Amine salts such as alkyl quaternary ammonium salts, alkylamine salts, fatty acid amide amine salts, ester-containing tertiary amine salts, Arcobel-type tertiary amine salts, cyclic quaternary ammonium salts such as alkylpyridinium salts and alkylisoquinolium salts, Benzethonium chloride may be mentioned. 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 anionic surfactants include alkyl ether sulfates, POE alkyl ether sulfates, alkyl sulfates, alkenyl ether sulfates, alkenyl sulfates, olefinsulfonates, alkanesulfonates, saturated or unsaturated fatty acid salts, alkyl Alternatively, alkenyl ether carboxylates, α-sulfone fatty acid salts, N-acyl amino acid type surfactants, phosphoric acid mono- or diester type surfactants, and sulfosuccinic acid esters are exemplified. The counterions of the anionic groups of these surfactants may be sodium ions, potassium ions, and triethanolamine.

Amphoteric surfactants include amino acid-type amphoteric surfactants and betaine-type amphoteric surfactants. Specific examples of amino acid-type amphoteric surfactants include N-lauroyl-N'-carboxymethyl-N'-hydroxyethyl Specific examples of betaine-type amphoteric surfactants include ethylenediamine sodium (sodium lauroamphoacetate), coconut oil alkyl betaine, lauryldimethylamino betaine, myristyldimethylamino betaine, stearyldimethylamino betaine, stearyldimethylamino betaine sodium, coconut and oil fatty acid amidopropyl betaine.

<Inorganic salt>
Examples of excipients include inorganic salts such as sodium sulfate, in addition to (F) lactose. Sodium sulfate is not a preferred component in the present invention, but it may be included in the powdered hair dye composition as long as it does not impair the actions and effects described in the section "Effects of the third invention" for (F) lactose.

<Other optional ingredients>
In addition to the above, the powdered hair dye composition of the present invention contains a pH adjuster, (F) sugars other than lactose, hair growth ingredients, plant extracts, crude drug extracts, amino acids/polypeptides, vitamins, fragrances, and preservatives. agent, ultraviolet absorber, and the like.

[Method of using powder hair dye composition]
The powdery hair dye composition of the present invention is mixed with a liquid medium such as water at the time of use to prepare a hair dye application liquid. This hair dye application liquid corresponds to a mixture of the first and second agents in a two-part liquid hair dye, and the step of applying this hair dye application liquid to the hair is a two-part liquid dye. It is the same as the mixture of the first agent and the second agent in the hair preparation.

The liquid medium is preferably water such as tap water, purified water, deionized water, distilled water, or a water-based liquid medium. Water is more preferred. The mass-based mixing ratio of the powdered hair dye composition and the liquid medium is not limited, but the powdered hair dye composition: liquid medium is preferably 1:5 to 1:15, particularly preferably 1:8 to 1:12. .

The dosage form of the hair dye application liquid is not particularly limited, and may be liquid, cream, gel or paste. A cream or paste form is preferred from the viewpoint of improving ease of brushing, spreadability and adhesion to the hair, and excellent application operability. Further, the hair dye coating liquid may be further foamed or misted. In the case of forming a foam, it may be filled in a shaking container and shaken to form foam, or a known foaming device such as a non-aerosol foamer or an aerosol foamer may be used.

As means for applying the hair dye application liquid to the hair, it may be applied to the hair using an applicator such as a comb, a brush, or a brush. Alternatively, the hair dye application liquid may be applied to the hair with a gloved hand.

For mixing the powdery hair dye composition and the liquid medium, various preparation tools such as containers such as bottles, cups and trays and stirring tools such as stirring rods can be used. For example, by enclosing the powdered hair dye composition and the liquid medium in a bottle at a predetermined ratio and shaking the bottle, each agent can be easily and quickly mixed. Furthermore, it is more preferable to use an applicator container that includes a bottle and an applicator that is connected to the bottle and that discharges the hair dye application liquid in the bottle. Examples of the applicator included in the applicator container include comb-shaped, brush-shaped, and nozzle-shaped applicators. As the applicator, a comb-equipped container capable of applying the hair dye application liquid to the hair while combing the hair is preferable from the viewpoint of convenience.

Although there is no particular limitation on the time of leaving after application to the hair, it may be about 30 to 40 minutes. After the leaving time, the hair dye application liquid adhering to the hair is washed away. After that, the hair can be properly treated with shampoo, conditioner, treatment, or the like.

Examples of the present invention will now be described along with corresponding comparative examples. The technical scope of the present invention is not limited by these Examples and Comparative Examples.

[Preparation of compositions according to Examples and Comparative Examples]
Examples 1 to 5 and Comparative Examples 1 to 5 of the powdery hair dye composition shown in Tables 1 and 2 at the end were prepared according to a conventional method. In the table, the numerical value shown in the ingredient column of each example and comparative example indicates the content of the ingredient in the powder hair dye composition in units of % by mass. The components (A) to (G) of the present invention are respectively indicated by "(A)" to "(G)" on the left side of the component name column.

[Evaluation of compositions according to Examples and Comparative Examples]
Next, the powdery hair dye composition according to each example and comparative example was first evaluated for fluidity, and then the solubility, operability, and leveling property were evaluated by the following evaluation methods, respectively, according to the following evaluation criteria. evaluated based on

(Evaluation of liquidity)
Evaluation method: 10 g of each of the powdered hair dye composition according to each example and comparative example was gently placed in a 100 mL graduated cylinder, the top surface was carefully smoothed as necessary, and the bulk volume (cm ³ ) was read. A bulk density a (g/cm ³ ) was calculated. Then, the graduated cylinder was tapped 100 times, and the upper surface was carefully leveled if necessary, and then the bulk volume (cm ³ ) was read again to calculate the bulk density b (g/cm ³ ). Then, the compressibility of the powdery hair dye composition according to each example and comparative example was determined by the following formula.
Compressibility = [(ba)/b] x 100
Evaluation criteria: A powder with a lower degree of compression has higher fluidity, which means that it is preferable in the present invention. and evaluated. The evaluation results are shown in the corresponding evaluation column for each example and comparative example in Tables 1 and 2.

(Evaluation of solubility)
Evaluation method: 6 g of the powdery hair dye composition according to each example and comparative example was charged into a flat-bottomed mixing vessel (diameter: 100 mm, cylindrical), leveled, and then 60 g of water was added. . Immediately after that, the brush was rotated on the bottom surface of the mixing container at a speed of 1 rotation/1 second to mix the powdered hair dye composition and water, and clumps of the powdered hair dye composition were visible. The time until it disappeared was measured.
Evaluation criteria: In evaluating the solubility, 10 trained panelists were selected, and the following evaluation criteria were used after standardizing the rotation movement with the brush and giving them a common recognition of the state of "no visible lumps". presentation.
Rank ◯: The lumps completely disappeared within 1 minute after the start of the mixing operation.
Rank Δ: Some lumps remained after 1 minute from the start of the mixing operation.
Rank x: Remaining lumps were conspicuous even after 1 minute from the start of the mixing operation.
For each example and comparative example, when each panelist's evaluation did not match, the evaluation rank with the highest number of evaluations was adopted. There were no cases where the most frequent evaluation rank was multiple. The evaluation results are shown in the corresponding evaluation column for each example and comparative example in Tables 1 and 2.

(Evaluation of operability)
Evaluation method: 3 g of the powdered hair dye composition according to each example and comparative example and 30 g of water are put into a 100 mL mixing container, and mixed for 2 minutes at a speed of 1 rotation / 1 second using a stirring rod to dye. A hair coating liquid was prepared. Ten panelists applied each hair dye application liquid to human hair using a brush. These panelists have undergone this type of evaluation training in advance, and prior to evaluation, they practiced using a sample hair dye application liquid to standardize the evaluation.
Evaluation criteria: Operability was evaluated according to the following criteria. When each panelist's evaluation did not match, the most popular evaluation rank was adopted. There were no cases where the most frequent evaluation rank was multiple. The evaluation results are shown in the corresponding evaluation column for each example and comparative example in Tables 1 and 2.
◯: Very easy to remove with a brush, and very good spreadability and adhesion to the hair.
Δ: Can be removed with a brush, and has good spreadability and adhesion to hair.
x: Difficult to remove with a brush, insufficient spreadability and adhesion to hair.

(Evaluation of levelness)
Evaluation method: 3 g of the powdered hair dye composition of each example and comparative example and 30 g of water were charged into a 100 mL mixing vessel and mixed with a stirring bar to prepare a hair dye application liquid. 3 g of the obtained hair dye coating liquid was applied to 1 g of white hair tresses using a brush, and the hair was dyed by allowing to stand for 40 minutes after the application operation. The dyed hair tresses were rinsed with water and shampoo to remove the hair dye application liquid, treated with a conditioner, wiped off moisture with a towel, and dried with a drier.
Evaluation criteria: Ten panelists visually observed the degree of unevenness in color of the dyed hair tresses after drying, and sensory evaluated whether or not there was unevenness in color. These panelists have undergone this type of evaluation training in advance, and prior to the evaluation, sample hair tresses corresponding to the following evaluation ranks are presented to standardize the evaluation.
As specific evaluation criteria, "5" for "evenly dyed", "4" for "almost evenly dyed", "3" for "very evenly dyed", and "unevenness""2" was given when there was a lot of unevenness, and "1" was given when there was "extremely unevenness". The average score of the obtained evaluations by the 10 panelists was calculated, and the numbers below the decimal point were rounded off to obtain the evaluation of level dyeing property. The evaluation results are shown in Tables 1 and 2 in the section of "level dyeing".

According to the present invention, problems peculiar to powdered hair dyes such as operability of a powdered hair dye composition, solubility when mixed with a liquid medium, and ensuring proper viscosity after mixing with a liquid medium are addressed. can.

Claims (3)

A powdery hair dye composition containing (A) a percarbonate and (B) an oxidation dye, further containing (C) guar gum and (D) sucrose fatty acid ester, and (C) against guar gum ( D) A powder hair dye composition having a sucrose fatty acid ester content mass ratio (D)/(C) in the range of 0.01 to 0.6. The powder hair dye composition according to claim 1, wherein the content of (C) guar gum is 5 to 20% by mass, and the content of (D) sucrose fatty acid ester is 0.2 to 5% by mass. . 3. The powdery hair dye composition according to claim 1, further comprising any one or more of the following (E) to (G).
(E) L-threonine (F) lactose (G) starch