JP7236296B2 - Hair dyeing composition and hair dyeing method - Google Patents

Description

The present invention relates to a hair dyeing composition and a hair dyeing method using the hair dyeing composition.

Various hair dyeing compositions have been provided for the purpose of dyeing hair. Examples of hair dyeing compositions include oxidative hair dyes containing oxidative dyes and semi-permanent hair dyes containing direct dyes such as acid dyes.

A hair-dyeing composition containing an oxidative dye is used to dye hair by developing a color through an oxidation reaction of the oxidative dye. On the other hand, a hair dyeing composition containing a direct dye does not involve an oxidation reaction, so hair dyeing can be achieved while suppressing damage to the hair and irritation to the scalp and the like caused by the oxidation reaction.

As an example of a hair dyeing composition containing the above direct dye, an acidic hair dye composition containing a pH adjuster such as an organic acid and a thickener is added with a predetermined acid dye and an alkylene glycol ester. , a technique has been proposed that enhances hair dyeing power, suppresses color fading after hair dyeing, and enhances the uniformity of dyed color tone (Patent Document 1).

Japanese Patent Application Laid-Open No. 2008-201737

In a hair dyeing composition containing a direct dye, the hair dyeing effect is obtained by the adsorption of the direct dye to the hair and the penetration of the direct dye into the hair. However, in a hair dyeing composition containing a direct dye, the direct dye does not sufficiently adsorb or permeate into the hair, and the hair cannot be dyed deeply, and the desired hair dyeing result cannot be obtained in some cases.
Therefore, there is a demand for further improving the hair dyeing properties of hair dyeing compositions containing direct dyes.

An object of the present invention is to provide a hair dyeing composition with improved hair dyeing properties, and to provide a hair dyeing method using the hair dyeing composition.

As a result of intensive studies by the present inventors, the hair dyeing property of the hair dyeing composition is improved if polyamide-8 or polyamide-3 is blended with the hair dyeing composition containing the direct dye. I found what I can do. Further, the present inventors have found that the hair dyeing composition can provide a hair dyeing method with improved hair dyeing properties.

That is, the hair dyeing composition of the present invention contains polyamide-8 or polyamide-3 and a direct dye.

The hair dyeing composition of the present invention has hair dyeing properties when the blending amount of the polyamide-8 is 0.01% by mass or more, or the blending amount of the polyamide-3 is 0.01% by mass or more. improved.

If the hair dyeing composition of the present invention further contains di(C12-15) pareth-2 phosphoric acid, it is preferable because the hair dyeing property is further improved.

If the hair dyeing composition of the present invention further contains polyvinylpyrrolidone, it is preferable because it is excellent in suppressing dripping.

The hair dyeing method of the present invention uses the above hair dyeing composition.

According to the hair dyeing composition of the present invention, the hair dyeing property of the hair dyeing composition can be improved. Further, according to the hair dyeing method of the present invention, it is possible to provide a hair dyeing method with improved hair dyeing properties.

Photographs showing the evaluation results of "suppression of dripping" in the hair dyeing compositions of Examples 1 and 9.

The present invention will be described below based on the embodiments of the present invention.

The hair dyeing composition of this embodiment contains polyamide-8 or polyamide-3 and a direct dye. The hair dyeing composition of the present embodiment may contain either polyamide-8 or polyamide-3, or may contain both.

<Polyamide-8>
By blending polyamide-8 into the hair dyeing composition of the present embodiment, hair dyeing properties can be improved. Polyamide-8 blended in the hair dyeing composition of the present embodiment is a copolymer of ethylenediamine, neopentyl glycol, and hydrogenated dimer dilinoleic acid whose terminals are blocked with stearyl alcohol.
The hair dyeing composition of the present embodiment may contain one or two or more types of polyamide-8.

The polyamide-8 to be blended in the hair dye composition of the present embodiment, for example, using a solution in which polyamide-8 is dissolved in benzyl alcohol so that 10% by mass, stress-controlled rheometer (for example, , HAAKE "Rheo Stress 6000"), measurement temperature 25 ° C., cone plate sensor diameter 35 mm and inclination angle 2 °, steady flow curve mode, waiting time 1 minute, shear rate 36 s ^-1 A viscosity value of 1 mPa·s or more and 10 mPa·s or less can be used.

The lower limit of the amount of polyamide-8 blended in the hair dyeing composition of the present embodiment is preferably 0.01% by mass or more, and 0.1%, from the viewpoint of further improving the hair dyeing property. % by mass or more is more preferable, and 0.3% by mass or more is even more preferable. In addition, the upper limit of the amount of the polyamide-8 is preferably 3% by mass or less, more preferably 1% by mass or less, and 0.7% by mass, from the viewpoint of reducing the hard touch of the hair after dyeing. More preferred are:

<Polyamide-3>
By blending polyamide-3 into the hair dyeing composition of the present embodiment, hair dyeing properties can be improved. Polyamide-3 blended in the hair dyeing composition of the present embodiment is a polymer obtained by condensing dilinoleic acid, ethylenediamine, and polypropylene glycol diamine, and the end of the polymer is PEG/PPG-32/10 aminopropyl methyl ether. It is blocked by
The hair dyeing composition of the present embodiment may contain one or more polyamide-3s.

The polyamide-3 to be blended in the hair dyeing composition of the present embodiment, for example, using a solution in which 10% by mass of polyamide-3 is dissolved in benzyl alcohol, is measured using a stress-controlled rheometer (for example, , HAAKE "Rheo Stress 6000"), measurement temperature 25 ° C., cone plate sensor diameter 35 mm and inclination angle 2 °, steady flow curve mode, waiting time 1 minute, shear rate 36 s ^-1 A viscosity value of 20 mPa·s or more and 50 mPa·s or less can be used.

The lower limit of the amount of polyamide-3 blended in the hair dyeing composition of the present embodiment is preferably 0.01% by mass or more, and 0.1%, from the viewpoint of further improving the hair dyeing property. % by mass or more is more preferable, and 0.3% by mass or more is even more preferable. In addition, the upper limit of the amount of the polyamide-3 is preferably 3% by mass or less, more preferably 1% by mass or less, and 0.7% by mass, from the viewpoint of reducing the hard feel of the hair after dyeing. More preferred are:

<Direct dye>
If a direct dye is blended in the hair dyeing composition of the present embodiment, the hair can be dyed by the direct dye adsorbing and/or penetrating into the hair. One or two or more direct dyes can be used as the direct dyes blended in the hair dyeing composition of the present embodiment.
Examples of the direct dyes include acid dyes, basic dyes, nitro dyes, disperse dyes and natural dyes.

The acid dye exists as an anion in the hair dyeing composition, and hair dyeing is realized by adsorption of the ion to the hair.
Examples of the acid dye include Red No. 2 (Amaranth), Red No. 3 (Erythrosine), Red No. 102 (New Coccine), Red No. 104 (1) (Phloxine B), Red No. 105 (1) ( Rose Bengal), Red No. 106 (Acid Red), Red No. 201 (Lithol Rubine B), Red No. 227 (Fast Acid Magenta), Red No. 230 (1) (Eosine YS), Red No. 230 (2) ( Eosine YSK), Red No. 231 (Phloxine BK), Red No. 232 (Rose Bengal K), Red No. 401 (Violamine R), Red No. 502 (Ponceau 3R), Red No. 503 (Ponceau R), Red No. 504 (Ponceau) SX), Red No. 506 (Fast Red S), Yellow No. 4 (Tartrazine), Yellow No. 5 (Sunset Yellow FCF), Yellow No. 202 (1) (Uranine), Yellow No. 202 (2) (Uranine K) , Yellow No. 203 (Quinoline Yellow WS), Yellow No. 402 (Polar Yellow 5G), Yellow No. 403 (1) (Naphthol Yellow S), Yellow No. 406 (Metanil Yellow), Yellow No. 407 (Fast Light Yellow 3G), Orange No. 205 (Orange II), Orange No. 207 (Erythrosine Yellowish NA), Orange No. 402 (Orange I), Acid Orange 3 (INCI name: Acid Orange 3), Green No. 3 (Fast Green FCF), Green No. 204 ( Pyranine Conc), Green No. 205 (Light Green SF Yellowish), Green No. 401 (Naphthol Green B), Green No. 402 (Guinea Green B), Purple No. 401 (Alizurol Purple), Blue No. 1 (Brilliant Blue FCF), Blue No. 2 (Indigo Carmine), Blue No. 202 (Patent Blue NA), Blue No. 203 (Patent Blue CA), Blue No. 205 (Alphazurine FG), Acid Blue 3, Brown No. 201 (Rezorich Brown), Black No. 401 (Naphthol Blue Black) etc. .
The content of the acid dye in the hair dye composition is not particularly limited, but is, for example, 0.01 to 5% by mass.

The basic dye is present as a cation in the hair dyeing composition, and hair dyeing is realized by adsorption of the ion to the hair.
Examples of the basic dyes include basic yellow 40, basic yellow 57, basic yellow 87, basic purple 1, basic purple 2, basic purple 3, basic purple 4, basic purple 14, basic Basic purple 16, basic blue 3, basic blue 7, basic blue 9, basic blue 26, basic blue 75, basic blue 99, basic blue 124, basic red 2, basic red 22, basic Basic Red 46, Basic Red 51, Basic Red 76, Basic Brown 16, Basic Brown 17, Basic Green 1, Basic Green 4, Basic Orange 31, and the like.
The blending amount of the basic dye in the hair dye composition is not particularly limited, but is, for example, 0.01 to 5% by mass.

The nitro dye is a direct dye having a nitro group in the molecule (excluding those corresponding to the acid dye and the basic dye), and dyes the hair by adsorption or penetration into the hair.
Examples of the nitro dyes include HC yellow 2, HC yellow 4, HC yellow 5, HC yellow 9, HC yellow 11, HC yellow 13, HC purple 1, HC purple 2, HC blue 2, HC blue 12, and HC red. 1, HC red 3, HC red 7, HC red 10, HC red 11, HC red 13, HC orange 1, HC orange 2, 2-nitro-p-phenylenediamine, N,N'-bis(2-hydroxyethyl )-2-nitro-p-phenylenediamine, 2-amino-3-nitrophenol, 4-hydroxypropylamino-3-nitrophenol, 2-amino-6-chloro-4-nitrophenol, 2-nitro-5- glycerylmethylaniline, 3-nitro-p-hydroxyethylaminophenol, 3-methylamino-4-nitrophenoxyethanol and the like.
The blending amount of the nitro dye in the hair dye composition is not particularly limited, but is, for example, 0.01 to 5% by mass.

Examples of the disperse dye include disperse blue 1, disperse blue 3, disperse black 9, disperse purple 1, and the like.
The content of the disperse dye in the hair dye composition is not particularly limited, but is, for example, 0.01 to 5% by mass.

The natural dyes include, for example, Suou color, Akaminoki color, Yellowfin color, Gardenia yellow color, Red Koji color, Red Koji color, Cochineal color, Turmeric color and the like.
The blending amount of the natural dye in the hair dye composition is not particularly limited, but is, for example, 0.01 to 5% by mass.

<Optional component>
Optional components other than the polyamide-8, polyamide-3, and direct dyes blended in the hair dyeing composition of the present embodiment are appropriately selected from components blended in known hair dyeing compositions. be done.
The optional components include di(C12-15) pareth-2 phosphate, polyvinylpyrrolidone, penetration enhancers, polymer compounds other than polyvinylpyrrolidone, water, and surfactants other than di(C12-15) pareth-2 phosphate. Agents (anionic surfactants, amphoteric surfactants, cationic surfactants, nonionic surfactants), polyhydric alcohols, sugars, esters, fats and oils, fatty acids, waxes, higher alcohols, amino acids, animal and plant extracts, microbial products, Inorganic compounds, powders, acids, alkalis, fragrances, preservatives, sequestering agents, etc. (excluding those corresponding to polyamide-8, polyamide-3, and direct dyes).

[Di (C12-15) Pareth-2 Phosphate]
If di(C12-15) pareth-2 phosphoric acid is added to the hair dyeing composition of the present embodiment, hair dyeing properties can be further improved.
The di(C12-15) pareth-2 phosphate is a diester of (C12-15) pareth-2 and phosphoric acid. The above (C12-15) Pareth-2 means a product obtained by addition polymerization of ethylene oxide to a synthetic aliphatic alcohol having 12 to 15 carbon atoms and having an average number of added moles of 2.

The blending amount of the di(C12-15) pareth-2 phosphoric acid in the hair dyeing composition of the present embodiment is not particularly limited.
The lower limit of the amount of di(C12-15) pareth-2 phosphoric acid is preferably 0.1% by mass or more, and 0.3% by mass or more, from the viewpoint of further improving the hair dyeing property. more preferred. In addition, if the amount is too large, the effect of further improving the hair dyeing property due to the addition of di(C12-15) pareth-2 phosphoric acid tends to decrease, so the upper limit of the amount is 3% by mass or less. Preferably, 1% by mass or less is more preferable.

[Polyvinylpyrrolidone]
If one or more polyvinylpyrrolidone is blended in the hair dyeing composition of the present embodiment, it is possible to suppress dripping after applying the hair dyeing composition to the hair, Makes hair manipulation easier. The polyvinylpyrrolidone means a polymer of 1-vinyl-2-pyrrolidone.

The polyvinylpyrrolidone blended in the hair dyeing composition of the present embodiment is measured using, for example, a 10% by mass aqueous solution of polyvinylpyrrolidone with a stress-controlled rheometer (for example, "Rheo Stress 6000" manufactured by HAAKE). Then, the viscosity value measured under the conditions of a measurement temperature of 25 ° C., a cone plate sensor diameter of 35 mm and an inclination angle of 2 °, a steady flow curve mode, a waiting time of 1 minute, and a shear rate of 36 s ^-1 is 100 mPa s or more and 300 mPa. · s or less can be used.

The blending amount of the polyvinylpyrrolidone in the hair dyeing composition of the present embodiment is not particularly limited. The lower limit of the blending amount is preferably 0.05% by mass or more, more preferably 0.2% by mass or more, from the viewpoint of more excellent suppression of dripping of the hair dyeing composition. In addition, the upper limit of the blending amount is preferably 3% by mass or less, more preferably 1% by mass or less, from the viewpoint of suppressing the dyed hair from becoming hard to the touch.

[Penetration enhancer]
The hair-dyeing composition of the present embodiment preferably contains one or more permeation enhancers in order to promote the permeation of the direct dye into the hair.
Examples of the penetration enhancer include aromatic alcohols, aliphatic monohydric alcohols, aliphatic polyhydric alcohols, and alkylene carbonates.

Examples of the aromatic alcohol include benzyl alcohol, 2-phenylethyl alcohol, cinnamyl alcohol, phenylpropanol, α-methylbenzyl alcohol, dimethylbenzyl carbinol, benzyloxyethanol, phenoxyethanol, p-anisyl alcohol, and the like. be done.
Examples of the aliphatic monohydric alcohol include ethanol and isopropanol.
Examples of the aliphatic polyhydric alcohol include ethylene glycol, propylene glycol, 1,3-butylene glycol, glycerin, ethoxydiglycol and the like.
Examples of the alkylene carbonate include ethylene carbonate and propylene carbonate.

The blending amount of the penetration enhancer is not particularly limited, but is, for example, 1% by mass or more. Even if the blending amount is too large, the effect of the penetration enhancer does not differ greatly, so it is preferable that the blending amount is 20% by mass or less.

[acid]
When an acid dye is used as the direct dye in the hair dyeing composition of the present embodiment, an acid may be added from the viewpoint that the acid dye is more likely to be adsorbed by the hair. Examples of acids include organic acids and inorganic acids.
Examples of organic acids include glycolic acid, lactic acid, glyceric acid, gluconic acid, malic acid, tartaric acid, citric acid, succinic acid, glutamic acid, and aspartic acid. Examples of inorganic acids include hydrochloric acid and phosphoric acid.
The amount of acid to be added is not particularly limited, but is, for example, 0.1% by mass or more and 10% by mass or less.

[Polymer compounds other than polyvinylpyrrolidone]
One or more polymer compounds other than polyvinylpyrrolidone may be added to the hair dyeing composition of the present embodiment. Examples of polymer compounds other than polyvinylpyrrolidone include natural polymers, semi-synthetic polymers, and synthetic polymers.
Examples of the natural polymer include xanthan gum, alginic acid or salts thereof, guar gum, glucan, cellulose, hyaluronic acid or salts thereof. Examples of the semisynthetic polymer include methylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, carboxymethylcellulose, soluble starch, and the like. Examples of the synthetic polymer include carboxyvinyl polymer, polyvinyl alcohol, polyacrylic acid amide, (acrylic acid/alkyl methacrylate) copolymer, methacryloylethyl betaine/methacrylic acid ester copolymer, (hydroxyethyl acrylate/acryloyldimethyl taurine Na) copolymer, polyethylene glycol, polyoxyethylene/polyoxypropylene glycol, and the like.
The blending amount of the polymer compound other than polyvinylpyrrolidone is not particularly limited, but is, for example, 0.1% by mass or more and 10% by mass or less.

[water]
Water may be blended in the hair dyeing composition of the present embodiment. The blending amount of water is not particularly limited, but is, for example, 50% by mass or more and 90% by mass or less.

<Hair dye composition>
The hair dyeing composition of the present embodiment means a composition used for hair dyeing.

(dosage form)
The dosage form of the hair dyeing composition of the present embodiment is not particularly limited, and examples thereof include liquid, milky lotion, gel, cream, foam, and spray.
Moreover, the form of the dosage form is not particularly limited, but examples thereof include an O/W emulsion, a W/O emulsion, and a W/O/W emulsion.

(Product form)
The product form of the hair dyeing composition of the present embodiment is not particularly limited, but examples thereof include hair manicure, color rinse, color treatment, color shampoo and the like.

(viscosity)
The viscosity at 25° C. of the hair dye composition of the present embodiment is, for example, 1000 mPa·s or more and 10000 mPa·s or less. The viscosity was measured using a stress-controlled rheometer (e.g., "Rheo Stress 6000" manufactured by HAAKE) at a measurement temperature of 25°C, a cone-plate sensor diameter of 35 mm and an inclination angle of 2°, steady flow curve mode, waiting It is measured under conditions of a time of 1 minute and a shear rate of 36 s ⁻¹ .

(pH)
The pH of the hair dyeing composition of the present embodiment is not particularly limited.
When one or more acid dyes are blended as the direct dye in the hair dyeing composition of the present embodiment, the pH of the hair dyeing composition at 25 ° C. is is preferably 4 or less. In that case, the lower limit of the pH at 25°C of the hair dyeing composition of the present embodiment is, for example, 1 or less.
When one or more basic dyes are blended as the direct dye in the hair dyeing composition of the present embodiment, the pH of the hair dyeing composition at 25° C. is, for example, 7 or more and 9 or less.

(Production method)
As a method for producing the hair dyeing composition of the present embodiment, a known production method may be employed. One example of the manufacturing method is a method of uniformly mixing polyamide-8 or polyamide-3 and a direct dye.

(how to use)
As a method for using the hair dyeing composition of the present embodiment, a known method for using a hair dyeing composition may be adopted. As a method of use, for example, it may be washed off after application of the hair dyeing composition.

<Hair dyeing method>
The hair dyeing method of this embodiment uses the hair dyeing composition of this embodiment in which polyamide-8 or polyamide-3 and a direct dye are blended.
As the hair dyeing method of the embodiment, a hair dyeing method using a known hair dyeing composition can be adopted. As an example of the hair dyeing method of the present embodiment, the hair dyeing composition of the present embodiment is applied to wet hair, left to stand at room temperature or heated for 5 to 30 minutes after application, and the hair is washed after leaving. There is a method of rinsing with water and drying the hair.

EXAMPLES The present invention will be described in detail below based on examples, but the present invention is not limitedly interpreted based on the description of these examples.

(Preparation of hair dyeing composition)
Hair dyeing compositions of Examples 1-9 and Comparative Examples 1-3 were prepared by mixing the components shown in Tables 1-4.

(Evaluation of Examples 1 to 7 and Comparative Examples 1 to 3)
Using the prepared hair dyeing compositions of Examples 1 to 7 and Comparative Examples 1 to 3, the following "hair dyeability" was evaluated.

(Evaluation of hair dyeability)
3 g of the hair dye composition of Examples 1 to 7 and Comparative Examples 1 to 3 was applied to a dried yak hair bundle BM-YK-A (10 cm in length, 1 g in weight) manufactured by Beaulux, The hair was dyed by leaving it at room temperature for 20 minutes. Each dyed hair tress was rinsed with running water for about 30 seconds, towel-dried, and then dried with a dryer.
Measurement type: reflection measurement, field of view: 10 °, main light source: D65, measurement diameter Under the measurement conditions of φ8 mm and the SCE method (specular reflection removed), the front and back surfaces of the tuft were measured three times each, and the average value of the L ^* value indicating the lightness was obtained from a total of six measurements. Furthermore, using the average value of each L ^* value obtained, the value of ΔL ^* was obtained from the following formula.
ΔL ^* = [(Average L ^* values of Examples 1 to 7 or Comparative Examples 2 and 3) - (Average L ^* values of Comparative Example 1)]
A smaller value of ΔL ^* indicates that the hair is dyed darker than in Comparative Example 1 (standard) and the hair dyeing property is excellent.

(Evaluation results)
Table 1 below shows the evaluation results of the hair dyeing compositions of Examples 1 and 2 and Comparative Examples 1 to 3 together with the blended components. The numerical value of each component in Table 1 is mass %, and the notation of "-" indicates that it is not blended.

From the results shown in Table 1, the hair dyeing compositions of Examples 1 and 2 had smaller values of ΔL ^* than the standard hair dyeing composition of Comparative Example 1, and had excellent hair dyeing properties. Met. In addition, the hair dyeing compositions of Comparative Examples 2 and 3 have larger values of ΔL ^* than the hair dyeing composition of Comparative Example 1, which is used as a reference, and are inferior in hair dyeing properties.

(Evaluation results)
Table 2 below shows the evaluation results of the hair dyeing compositions of Example 1, Examples 3 to 7, and Comparative Example 1 together with the blended components. The numerical value of each component in Table 2 is mass %, and the notation of "-" indicates that it is not blended.

From the results shown in Table 2, the hair dyeing compositions of Examples 1 and 3 to 7 have a smaller value of ΔL ^* than the hair dyeing composition of Comparative Example 1, which is the standard, and the hair dyeing property It was excellent for Therefore, it can be understood that when 0.01 to 3% by mass of polyamide-8 is added to the hair dyeing composition, the hair dyeing property is excellent.

(Evaluation of Examples 1 and 8)
Using the prepared hair dyeing compositions of Examples 1 and 8, evaluation of "hair dyeability" was performed in the same manner as in Examples 1 to 7 and Comparative Examples 1 to 3 above. The hair tress used for the evaluation was of a lot different from the tresses used in the evaluations of Examples 1 to 7 and Comparative Examples 1 to 3 above. ΔL ^* was calculated by the following formula.
ΔL ^* = [(Average value of L ^* values of Example 8) - (Average value of L ^* values of Example 1)]
A smaller value of ΔL ^* indicates that the hair is dyed darker than in Example 1 (reference) and the hair dyeing property is excellent.

(Evaluation results)
Table 3 below shows the evaluation results of the hair dyeing compositions of Examples 1 and 8 together with the blended components. The numerical value of each component in Table 3 is mass %, and the notation of "-" indicates that it is not blended.

From the results shown in Table 3, the hair dyeing composition of Example 8 had a smaller value of ΔL ^* than the hair dyeing composition of Example 1, which was used as a reference, and was excellent in hair dyeing properties. rice field. Therefore, it can be understood that when di(C12-15) pareth-2 phosphate is added to the hair dyeing composition, the hair dyeing property is further improved.

(Evaluation of Examples 1 and 9)
Using the prepared hair dyeing compositions of Examples 1 and 9, the evaluation of "suppression of dripping" was performed according to the following evaluation method and evaluation criteria.

(Evaluation method)
Evaluations were made according to the following procedures (1) to (4).
(1) Kent paper of A4 size (210 mm wide; 297 mm long) was prepared, and a horizontal line was drawn at a position about 5 cm from one long side of the Kent paper. Subsequently, a transparent vinyl wrap (made of polyvinylidene chloride) was put on the Kent paper.
(2) 1 g of the hair dyeing composition of Example 1 or 9 was placed on the vinyl wrap at the position of the horizontal line drawn on the Kent paper.
(3) With the hair dyeing composition left standing, lift one long side of the vinyl-wrapped Kent paper so that the hair dyeing composition faces upward, tilt it at an angle of about 70 degrees, and fix it. and left for 3 minutes.
(4) After 3 minutes had elapsed, suppression of dripping was evaluated according to the following evaluation criteria. After 3 minutes, a photograph was taken with the Kent paper tilted.

(Evaluation criteria)
◯: Superior in suppression of dripping than the standard (the hair dyeing composition is less dripping than the standard).
Equivalent: Equivalent drooling with reference.
x: Inferior to control of dripping than standard (hair dyeing composition drips more than standard).

(Evaluation results)
Table 4 below shows the evaluation results of the hair dyeing compositions of Examples 1 and 9 together with the blended components. The numerical value of each component in Table 4 is mass %, and the notation of "-" indicates that it is not blended.
FIG. 1 shows photographs of the hair dyeing compositions of Examples 1 and 9 after evaluation of suppression of dripping. 1 indicates the lower side of the Kent paper tilted at an angle of about 70 degrees, and "upper side" indicates the upper side of the Kent paper tilted at an angle of about 70 degrees. Further, the horizontal line on the upper side in FIG. 1 indicates the position where the hair dyeing composition of Example 1 or 9 was allowed to stand.

From the results shown in Table 4 and FIG. 1, the hair dyeing composition of Example 9 was superior to the hair dyeing composition of Example 1, which was used as a reference, in the evaluation of suppression of dripping. Therefore, it can be understood that the addition of polyvinylpyrrolidone to the hair dyeing composition is excellent in suppressing dripping. Although not shown in Table 4, the hair dyeing properties of Example 1 and Example 9 were almost the same when visually evaluated, and the addition of polyvinylpyrrolidone had almost no effect on the hair dyeing properties. rice field.

Claims (5)

A hair dyeing composition containing polyamide-8 or polyamide-3 and a direct dye. 2. The hair dyeing composition according to claim 1, wherein the blending amount of said polyamide-8 is 0.01% by mass or more, or the blending amount of said polyamide-3 is 0.01% by mass or more. 3. The hair dyeing composition according to claim 1, wherein di(C12-15) pareth-2 phosphate is blended. The hair dyeing composition according to any one of claims 1 to 3, which contains polyvinylpyrrolidone. A hair dyeing method using the hair dyeing composition according to any one of claims 1 to 4.

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