JP2024074014A - Hair dye composition - Google Patents

Abstract

To provide a hair dye composition that has trancparency, attaining both visibility during application and superior spreadability for uniform application.SOLUTION: The inventors have examined various dosage forms and components to solve the foregoing problem. According to discovery by the inventors, blending nonionic surfactants in hair dyes, including a direct dye, can enhance the transparency of the hair dyes. This invention provides a hair dye composition that contains (A) a direct dye and (B) a nonionic surfactant with an HLB of 15 or more.SELECTED DRAWING: None

Description

The present invention relates to a hair dye composition. More specifically, the present invention relates to a hair dye composition that is highly transparent even when used for dyeing hair.

Hair coloring products are generally classified into permanent hair dyes, semi-permanent hair dyes, temporary hair dyes, and bleaches. With semi-permanent hair dyes, the hair is dyed with direct dyes such as acid dyes and basic dyes. There are various formulations of semi-permanent hair dyes that use direct dyes. With cream and gel products, the dye turns white when applied, making it difficult to see how much of the hair has been dyed and how well it has been dyed, and uneven dyeing can easily occur; this problem is particularly likely with cream formulations. On the other hand, if the hair dye could be made transparent, it would be easier to see where it has already been applied and how well it has been dyed.

When it comes to semi-permanent hair dyes, simply making the dye transparent makes it difficult to apply the dye evenly and dye the hair evenly. Therefore, there is a demand for hair dyes that are both transparent, making them easy to see when applied, and easy to spread, allowing the dye to be applied evenly.

Patent Document 1 discloses a gel-type hair styling product that imparts appropriate moisturizing power and improves restyling properties while retaining the good usability and quick drying properties of a gel-type hair styling product. Patent Document 1 discloses that the gel-type hair styling product not only has a specific nonionic polymer compound and the excellent transparency and usability unique to gel-type formulations, but also contains ethanol and polyhydric alcohol in specific ratios, resulting in a high moisturizing effect. However, hair styling products are not intended for dyeing, and the desired effects are different from those of hair dyes.

JP 2018-308452 A

The present invention aims to provide a hair dye composition that is transparent, making it easy to see when applied, and that spreads easily so that the hair dye can be applied evenly. Furthermore, the present invention aims to provide a hair dye composition that has both visibility and good spreadability without compromising the feel after hair dyeing.

The inventors have investigated various formulations and ingredients to solve the above problems. The inventors have found that by blending a specific nonionic surfactant in a hair dye containing a direct dye, a hair dye composition can be obtained that is transparent and therefore has good visibility during application, and good spreadability that allows the hair dye to be applied evenly. The inventors have also found that by blending a sorbitan fatty acid ester as a nonionic surfactant, a hair dye composition can be obtained that has good visibility and good spreadability without reducing the feel after hair dyeing. The present invention was completed based on these findings.

The present invention provides a hair dye composition comprising (A) a direct dye and (B) a nonionic surfactant having an HLB of 15 or more.

The present invention also provides the above hair dye composition, which further contains (C) a lower alcohol.

The present invention also provides the above hair dye composition, in which the nonionic surfactant having an HLB of 15 or more is a sorbitan fatty acid ester.

The present invention also provides a hair dye composition that can be washed off after dyeing.

The present invention also provides the above hair dye composition, which is in a gel form.

The present invention further provides a hair dyeing method comprising the steps of applying the hair dye composition to hair and rinsing the hair dye composition after dyeing the hair.

The hair dye composition of the present invention is highly transparent, and is able to achieve both visibility during application and good spreadability that allows the agent to be applied evenly, eliminating uneven dyeing. In particular, the hair dye composition of the present invention is able to achieve both visibility during application and good spreadability without compromising the feel after hair dyeing.

One embodiment of the hair dye composition of the present invention will be described in detail below. The hair dye composition of the present invention contains (A) a direct dye and (B) a nonionic surfactant with an HLB of 15 or more.

In the hair dye composition of the present invention, the direct dye (A) can be any dye known in the art, such as a basic dye, an acid dye, a nitro dye, or a disperse dye.

The basic dyes include, for example, basic blue 124, basic blue 75, basic purple 2, basic yellow 87, basic orange 31, red 213, red 214, basic blue 3, basic blue 6, basic blue 7, basic blue 9, basic blue 26, basic blue 41, basic brown 1, basic brown 4, basic brown 16, basic brown 17, basic orange 1, basic orange 2, basic red 1, basic red 2, basic red 22, basic red 46, basic red 51, basic red 76, basic red 118, basic purple 10, basic purple 11:1, basic purple 16, basic yellow 11, basic yellow 28, basic yellow 57, and basic yellow 87, and preferably basic blue 124, basic blue 75, basic purple 2, basic yellow 87, and basic orange 31. The basic dyes can be used alone or in combination of multiple types.

Examples of acid dyes include Red No. 2, Red No. 3, Red No. 102, Red No. 104 (1), Red No. 105 (1), Red No. 106, Red No. 201, Red No. 227, Red No. 230 (1), Red No. 230 (2), Red No. 231, Red No. 232, 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. 203, Yellow No. 402, Yellow No. 403 (1), Yellow No. 406, Yellow No. 407, Orange No. 205, Orange No. 20 No. 7, Orange No. 402, Green No. 3, Green No. 204, Green No. 205, Green No. 401, Green No. 402, Purple No. 401, Blue No. 1, Blue No. 2, Blue No. 202, Blue No. 203, Blue No. 205, Brown No. 201, Black No. 401, Acid Blue 1, Acid Blue 3, Acid Blue 62, Acid Black 52, Acid Brown 13, Acid Green 50, Acid Orange 6, Acid Red 14, Acid Red 35, Acid Red 73, Acid Red 184, Brilliant Black 1, etc.

Examples of nitro dyes include 4-nitro-o-phenylenediamine, 2-nitro-p-phenylenediamine, 2-amino-4-nitrophenol, 2-amino-5-nitrophenol, N,N'-bis(2-hydroxyethyl)-2-nitro-p-phenylenediamine, hydroxyethyl-2-nitro-p-toluidine, 2-amino-6-chloro-4-nitrophenol, 3-nitro-p-hydroxyethylaminophenol, 4-amino-3-nitrophenol, 4-hydroxypropylamino-3-nitrophenol, picramic acid, picric acid, and their salts, HC Blue 2, HC Blue 4, HC Blue 5, HC Blue 6, HC Blue 8, HC Blue 9, HC Blue 10, HC Blue 11, HC Blue 12, HC Blue 13, HC Blue 14, HC Blue 18, HC Blue 19, HC Brown 1, HC Brown 2, HC Green 1, HC Orange 1, HC Orange 2, HC Orange 3, HC Orange 5, HC Orange 7, HC Red 1, HC Red 3, HC Red 7, HC Red 8, HC Red 9, HC Red 10, HC Red 11, HC Red 13, HC Red 14, HC Red 18, HC Purple 1, HC Purple 2, HC Purple 3, HC Yellow 2, HC Yellow 4, HC Yellow 5, HC Yellow 6, HC Yellow 7, HC Yellow 8, HC Yellow 9, HC Yellow 10, HC Yellow 11, HC Yellow 12, HC Yellow 13, HC Yellow 14, HC Yellow 15, HC Yellow 16, HC Yellow 18, etc.

Examples of disperse dyes include disperse black 9, disperse blue 1, disperse blue 3, disperse blue 7, disperse brown 4, disperse orange 3, disperse red 11, disperse red 15, disperse red 17, disperse purple 1, disperse purple 4, disperse purple 15, etc.

Other direct dyes that may be used include, for example, 1-amino-4-methylanthraquinone, 1,4-diaminoanthraquinone, and their salts, as well as direct dyes specified in the "Ministry Ordinance Specifying Tar Dyes That Can Be Used in Pharmaceuticals, etc." (Notification of 1966, Ministry of Health and Welfare).

Only one of these direct dyes may be contained alone, or two or more may be contained in combination. In addition, as the direct dye, a combination of two or more direct dyes with complementary colors can be selected to express the desired color.

The direct dye may be contained in any amount. For example, the direct dye may be contained in an amount of 0.001% by mass or more, preferably 0.01% by mass or more, more preferably 0.02% by mass or more, and 1% by mass or less, preferably 0.8% by mass or less, more preferably 0.7% by mass or less, of the total amount of the hair dye composition.

In the hair dye composition of the present invention, the nonionic surfactant (B) having an HLB of 15 or more can be any nonionic surfactant known to those skilled in the art. HLB (hydrophile-lipophile balance) is a value devised by W.C.Griffin and given to nonionic surfactants, and is a numerical value that represents the balance between the strength of the lipophilic group (alkyl group) and the hydrophilic group (ethylene oxide chain) of the nonionic surfactant. The HLB value is an actual value calculated from the emulsification method ("Handbook - Cosmetics and Pharmaceutical Raw Materials -" Nikko Chemicals Co., Ltd. (1977)). The nonionic surfactant having an HLB of 15 or more is preferably a fatty acid ester, and from the viewpoint of feel, sorbitan fatty acid ester is more preferable, and particularly preferred are PEG-20 sorbitan cocoate and PEG-40 hydrogenated castor oil polyglyceryl isostearate, and even more preferred is PEG-20 sorbitan cocoate. By including PEG-20 sorbitan cocoate, the hair dye composition of the present invention can achieve both high transparency of the hair dye and good spreadability that allows for uniform hair dyeing. In particular, by including PEG-20 sorbitan cocoate, the transparency of a gel-type hair dye containing a basic dye can be increased. (B) By including a sorbitan fatty acid ester as a nonionic surfactant with an HLB of 15 or more, a hair dye composition can be obtained that achieves both visibility and good spreadability without reducing the feel after hair dyeing.

The nonionic surfactant with an HLB of 15 or more can be contained in any amount in the hair dye composition of the present invention. The nonionic surfactant with an HLB of 15 or more can be contained in an amount of 0.001% by mass or more, preferably 0.01% by mass or more, more preferably 0.01% by mass or more and 10% by mass or less, preferably 7% by mass or less, more preferably 5% by mass or less of the total amount of the hair dye composition.

In the hair dye composition of the present invention, the (A) direct dye and the (B) nonionic surfactant with HLB of 15 or higher can be contained in any ratio. The ratio of the content of the (A) direct dye and the (B) nonionic surfactant with HLB of 15 or higher can be, for example, (A) direct dye/(B) nonionic surfactant with HLB of 15 or higher = 0.01 or more, such as 0.05 or more, preferably 0.1 or more, and 5 or less, such as 2 or less, preferably 1 or less. By containing the (A) direct dye and the (B) nonionic surfactant with HLB of 15 or higher in such a ratio, it is possible to achieve both uniform dyeing and hair dyeing power.

The hair dye composition of the present invention can contain the above-mentioned components (A) direct dye and (B) nonionic surfactant with HLB of 15 or more, as well as components that are generally used as bases for hair dye compositions. When acid dyes, basic dyes, HC dyes, disperse dyes, etc. are used as direct dyes, a base suitable for each dye can be selected, and the hair dye composition can be produced by blending the above-mentioned components (A) direct dye and (B) nonionic surfactant with HLB of 15 or more with the appropriate base.

The hair dye composition of the present invention may be a gel-like hair dye composition. In this specification, the term "gel-like" refers to a state in which the composition contains water and a gelling agent, is semi-solid to solid with viscosity and elasticity, has a transparent to translucent appearance, has the flexibility of a liquid and elasticity to return to its original shape when stress is applied, and has a higher viscosity than a thickened state. The viscosity is not limited to the following, but specifically, with respect to the viscosity at a shear rate as close to 0 s ^-1 as possible, i.e., the static viscosity, the "thickened state" is a static viscosity of less than 100 mPa·s measured using a Brookfield viscometer, whereas the static viscosity of the "gel-like" can be defined as a range of 1000 mPa·s or more, 5000 mPa·s or more, and 100000 mPa·s or less (30°C). Preferably, the gel-like state includes a state in which the viscosity value measured using a Brookfield viscometer is 1000 mPa·s or more to 100000 mPa·s or less (30°C). The gel-type hair dye composition is different from creams containing a large amount of higher alcohols or surfactants, and preferably does not contain linear higher alcohols. The gel-type hair dye composition is preferably in a non-emulsified state. In addition, it is preferable that the gel-type hair dye composition is not in a foaming form such as color shampoo from the viewpoint of visibility.

The hair dye composition of the present invention may contain a gelling agent. Any gelling agent known in the art may be used as the gelling agent. Examples of gelling agents include cationic polymers and nonionic polymers, and preferably contain cationic polymers from the viewpoint of feel.

The cationic polymer may be any known cationic thickening polymer, and may be either a natural or synthetic polymer. In particular, cationic polymers other than cationic cellulose are preferred in terms of good spreadability, and polyquaternium-37: poly(2-methacryloxyethyltrimethylammonium chloride) is more preferred. By incorporating an appropriate amount of polyquaternium-37 as a gelling agent, the feel and stability of the gel-type hair dye can be improved.

Other specific examples of cationic polymers include cationic cellulose derivatives, cationic starch, cationic guar gum, polymers or copolymers of diallyl quaternary ammonium salts, and quaternized polyvinylpyrrolidone.

Specific examples of cationic cellulose derivatives include polymers of quaternary ammonium salts obtained by adding glycidyl trimethylammonium chloride to hydroxyethyl cellulose (Polyquaternium-10 (INCI name): for example, Leoguard G and GP (manufactured by Lion Corporation), Polymer JR-125, JR-400, JR-30M, LR-400, and LR-30M (manufactured by Amerchol Corporation), and Cellcoat SC-230M (manufactured by Akzo Nobel Corporation)), and hydroxyethyl cellulose/dimethyl diallyl ammonium chloride copolymers (Polyquaternium-4: for example, Cellcoat H-100 and Cellcoat L-200 (manufactured by Akzo Nobel Corporation)).

Specific examples of the polymer or copolymer of diallyl quaternary ammonium salt include dimethyl diallyl ammonium chloride polymer (polydimethylmethylene piperidinium chloride) (Polyquaternium-6: for example, Merquat 100 (manufactured by Luvrisol)), dimethyl diallyl ammonium chloride/acrylic acid copolymer (Polyquaternium-22: for example, Merquat 280 (manufactured by Luvrisol)), acrylic acid/diallyl quaternary ammonium salt/acrylamide copolymer, etc. Preferred examples include hydroxyethyl cellulose dimethyl diallyl ammonium chloride and O-[2-hydroxy-3-(trimethylammonio)propyl]hydroxyethyl cellulose chloride.

Specific examples of quaternized polyvinylpyrrolidone include quaternary ammonium salts obtained from copolymers of vinylpyrrolidone and dimethylaminoethyl methacrylate and diethyl sulfate (Polyquaternium-11: e.g. Gafcoat 734 and 755 (manufactured by ISP Japan)).

The nonionic polymer may be any known nonionic thickening polymer, and may be either natural or synthetic. Specific examples of nonionic polymers include polyvinyl caprolactam, polyvinylpyrrolidone (PVP), (PVP/VA) copolymer, polyvinyl alcohol, polyvinyl butyral, cellulose derivatives such as hydroxyethyl cellulose, hydroxypropyl ethyl cellulose, and hydroxypropyl methyl cellulose, polyethylene glycol, highly polymerized polyethylene glycol, dextrin, guar gum, starch, and pullulan.

The gelling agent can be contained in any amount in the hair dye composition. For example, the gelling agent can be contained in an amount of 0.001% by mass or more, preferably 0.01% by mass or more, more preferably 0.1% by mass or more and 10% by mass or less, preferably 5% by mass or less, more preferably 4% by mass or less of the total amount of the gel hair dye composition. By containing a gelling agent in the gel hair dye composition of the present invention, it is possible to achieve both improved feel and improved visibility during application due to improved formulation stability of the gel.

In the hair dye composition of the present invention, the ratio of the content of the gelling agent to the nonionic surfactant (B) with HLB of 15 or more can be, for example, gelling agent/nonionic surfactant (B) with HLB of 15 or more = 0.1 or more, for example 0.3 or more, preferably 0.5 or more, and 10 or less, for example 5 or less, preferably 2.5 or less. By including a gelling agent to a nonionic surfactant (B) with HLB of 15 or more in such a ratio, not only can visibility during application and good spreadability that allows the hair dye to be applied evenly can be achieved, but also improvement in feel and visibility during application due to improved stability of the gel formulation can be achieved.

The hair dye composition of the present invention may contain (C) a lower alcohol. In addition to ethanol, any lower alcohol known in the art may be used as the lower alcohol, including various lower alcohols and their derivatives. Examples of lower alcohols include monohydric alcohols such as methanol and isopropanol, dihydric alcohols such as propylene glycol, butylene glycol, and dipropylene glycol, trihydric alcohols such as glycerin and trimethylolpropane, tetrahydric alcohols such as diglycerin and pentaerythritol, polyhydric alcohols such as polyethylene glycol and polyglycerin, and various polyhydric alcohol derivatives such as alkylene oxide addition polymers of polyhydric alcohols. One or more of (C) the lower alcohols may be selected and used. Among the above, dipropylene glycol is preferred.

The lower alcohol and the total content thereof in the hair dye composition of the present invention are preferably 14% by mass or less in the hair dye composition. The lower alcohol may be contained in the hair dye composition, for example, at 0.1% by mass or more, preferably 0.5% by mass or more, more preferably 1% by mass or more and 14% by mass or less, preferably 10% by mass or less, more preferably 5% by mass or less. When the hair dye composition of the present invention contains ethanol and lower alcohol in a total amount of 14% by mass or less, the finish after dyeing will have a good feel to the touch. Furthermore, the gel-type hair dye composition of the present invention can have an increased transparency in appearance by containing appropriate amounts of lower alcohol and ethanol.

Of the (C) lower alcohols contained in the hair dye composition of the present invention, ethanol can be contained, for example, at 0.1% by weight or more, preferably 0.2% by weight or more, more preferably 0.5% by weight or more and 10% by weight or less, preferably 5% by weight or less, more preferably 4% by weight or less. When ethanol is contained at or above the lower limit mentioned above, transparency can be improved, while when it is contained at or below the upper limit mentioned above, the feel can be improved.

The hair dye composition of the present invention may further contain a nonionic surfactant with an HLB of 13 or less. Any surfactant known in the art may be used as the nonionic surfactant with an HLB of 13 or less. In particular, the nonionic surfactant with an HLB of 13 or less is preferably a surfactant that is liquid at room temperature. The nonionic surfactant with an HLB of 13 or less may be, for example, coconut oil fatty acid PEG-7 glyceryl, PEG-40 hydrogenated castor oil polyglyceryl isostearate, sorbitan laurate, and polysorbate 85. In particular, the nonionic surfactant with an HLB of 13 or less is most preferably coconut oil fatty acid PEG-7 glyceryl. By containing a nonionic surfactant with an HLB of 13 or less, the dispersibility of the gelling agent in the hair dye composition of the present invention can be increased, and the stability can be improved. In addition, by containing a nonionic surfactant with an HLB of 13 or less, the hair dyeing power of the hair dye composition of the present invention can be increased.

A nonionic surfactant with an HLB of 13 or less may be contained in the hair dye composition in any amount. For example, a nonionic surfactant with an HLB of 13 or less may be contained in an amount of 0.001% by mass or more, preferably 0.01% by mass or more, more preferably 0.1% by mass or more and 10% by mass or less, preferably 7.5% by mass or less, more preferably 5% by mass or less of the total amount of the hair dye composition.

When the hair dye composition of the present invention is a gel-type hair dye composition containing a basic dye, the total content of ethanol and other lower alcohols contained in the gel-type hair dye composition can be 14% by mass or less in the gel-type hair dye composition. The lower alcohol can be contained in the gel-type hair dye composition in an amount of, for example, 0.1% to 14% by mass, 0.5% to 10% by mass, or 1% to 5% by mass. When the gel-type hair dye composition contains ethanol and lower alcohol in a total amount of 14% by mass or less, problems such as poor feel to the touch, such as squeaking, do not occur. Furthermore, by containing appropriate amounts of lower alcohol and ethanol in the gel-type hair dye composition of the present invention, the transparency of the appearance can be increased.

The content of water in the gel hair dye composition of the present invention is 80% by mass or more in the gel hair dye composition. The water can be contained in the gel hair dye composition, for example, in an amount of 80% by mass or more, preferably 85% by mass or more and 95% by mass or less, preferably 90% by mass or less. The higher the water content in the gel hair dye composition of the present invention, the more improved the hair dyeing power and dye uniformity.

The hair dye composition of the present invention may contain any other components in addition to the above components. The gel hair dye composition of the present invention may further contain, for example, a solubilizer, a surfactant other than a nonionic surfactant, an oil component, a pH adjuster, a sugar other than the above gelling agent, a chelating agent, an amino acid, a cooling agent, a preservative, an antibacterial agent, an antioxidant, an extract of an animal, a plant or a microorganism, an extract of a herbal medicine, a vitamin, a fragrance, an ultraviolet absorbing agent, etc. Only one of these components may be used, or two or more of them may be used in combination.

A solubilizer may be added to the hair dye composition as an ingredient for solubilizing each ingredient. Examples of solubilizers include water and organic solvents (solvents) other than ingredient (C). Only one type of organic solvent may be included alone, or two or more types may be included in combination.

Among solubilizers, water is preferably used because of its excellent ability to dissolve the components in the hair dye composition. When water is used as the solvent, the content of water in the hair dye composition is preferably 40% by mass or more, more preferably 50% by mass or more.

Surfactants other than nonionic surfactants may be added to the hair dye composition, for example, as an emulsifier or as a component for solubilizing each component. Surfactants may also be added, for example, to adjust the viscosity of the hair dye composition or to improve the viscosity stability. Examples of surfactants other than nonionic surfactants include cationic surfactants, anionic surfactants, and amphoteric surfactants.

Examples of cationic surfactants include lauryltrimethylammonium chloride, cetyltrimethylammonium chloride, stearyltrimethylammonium chloride, behenyltrimethylammonium chloride, cetrimonium methosulfate, behentrimonium methosulfate, behenyl PG trimonium chloride, stearoxypropyltrimonium chloride, arachidyltrimethylammonium chloride, alkyltrimethylammonium chloride, distearyldimethylammonium chloride, cetyltrimethylammonium bromide, stearyltrimethylammonium bromide, lanolin fatty acid aminopropylethyl dimethylammonium ethyl sulfate, stearyltrimethylammonium saccharin, cetyltrimethylammonium saccharin, methacryloyloxyethyltrimethylammonium chloride, behenyltrimethylammonium methylsulfate, behenyldimethylamine, behenic acid diethylaminoethylamide, behenic acid dimethylaminopropylamide, behenic acid dimethylaminoethylamide, stearyldimethylamine, palmitoxypropyldimethylamine, stearoxypropyldimethylamine, stearate dimethylaminopropylamide, etc. Among these, from the viewpoint of excellent effect of improving the feel of hair, dimethylaminopropylamide stearic acid is preferred as the tertiary amine, and cetyltrimethylammonium chloride, stearyltrimethylammonium chloride, behenyltrimethylammonium chloride, cetrimonium methosulfate, or behentrimonium methosulfate is preferred as the quaternary ammonium salt. Among these, cetyltrimethylammonium chloride, stearyltrimethylammonium chloride, behenyltrimethylammonium chloride, cetrimonium methosulfate, or behentrimonium methosulfate, which are quaternary ammonium salts, are more preferred. The content of the cationic surfactant in the hair dye composition is appropriately set. The content of the cationic surfactant is preferably 0.1% by mass or more, more preferably 0.5% by mass or more. When the content is within this range, the formulation stability is improved. Furthermore, the content of the cationic surfactant is preferably 5.0% by mass or less, more preferably 3.0% by mass or less. When the content is within this range, the deep dyeing ability of the hair dye composition can be further improved, and discoloration can be further suppressed.

Examples of amphoteric surfactants include cocobetaine, lauramidopropyl betaine, cocamidopropyl betaine, sodium lauroamphoacetate, sodium cocoamphoacetate, coconut oil fatty acid amidopropyl betaine, lauryl betaine (lauryl dimethylaminoacetate betaine), etc.

Of these non-nonionic surfactants, only one may be contained alone, or two or more may be contained in combination.

The hair dye composition of the present invention may contain a surfactant other than a nonionic surfactant, but the surfactant content can be, for example, 10% by mass or less, such as 8% by mass or less and 5% by mass or less, of the total amount of the hair dye composition. The hair dye composition of the present invention has a small surfactant content of 10% by mass or less, and thus has the characteristic of good visibility.

Oily components may be blended into the hair dye composition, for example, for the purpose of imparting a moist feel to the hair. Examples of oily components include fats and oils, waxes, hydrocarbons, ester oils, higher alcohols, silicones, higher fatty acids, and alkyl glyceryl ethers. Silicones can be, for example, (bisisobutyl PEG-14/amodimethicone) copolymers. Blending with silicones can improve the feel and also enhance the hair dyeability. Only one of these oily components may be included alone, or two or more may be included in combination.

The hair dye composition of the present invention may contain a higher alcohol, but the content of the higher alcohol may be, for example, 5% by mass or less of the total amount of the hair dye composition, for example, 3% by mass or less and 1% by mass or less, and may be unblended. The hair dye composition of the present invention has a small content of higher alcohol, 5% by mass or less, and thus has the characteristic of good visibility.

A pH adjuster may be added to the hair dye composition to adjust the pH of the hair dye composition. Examples of pH adjusters include alkaline agents, inorganic acids, organic acids, and salts of inorganic acids or organic acids, particularly arginine and tartaric acid. Examples of alkaline agents include ammonia, alkanolamines, organic amines, basic amino acids, hydroxides of alkali metals or alkaline earth metals, and the like. Examples of inorganic acids include phosphoric acid, silicic acid, metasilicic acid, and carbonic acid. Examples of phosphoric acid include orthophosphoric acid, polyphosphoric acid, pyrophosphoric acid, and metaphosphoric acid. Examples of organic acids include citric acid, tartaric acid, lactic acid, malic acid, succinic acid, fumaric acid, maleic acid, pyrophosphoric acid, gluconic acid, glucuronic acid, benzoic acid, and hydroxyethylethylenediaminetriacetic acid. Examples of salts include sodium salts, potassium salts, and ammonium salts. Note that salts of carbonic acid include carbonates and hydrogen carbonates. Among the pH adjusters, alkanolamines and salts of carbonic acid are preferred. The content of the pH adjuster in the hair dye composition is set appropriately, but is, for example, 0.001% by mass or more, preferably 0.01% by mass or more and 5% by mass or less, preferably 3% by mass or less. Of these pH adjusters, only one may be contained alone, or two or more may be contained in combination.

Examples of sugars include monosaccharides, disaccharides, and sugar alcohols. Examples of chelating agents include edetic acid (ethylenediaminetetraacetic acid (EDTA)), disodium edetate, tetrasodium edetate, diethylenetriaminepentaacetic acid and its salts, hydroxyethylethylenediaminetriacetic acid and its salts, and hydroxyethanediphosphonic acid (HEDP) and its salts. Examples of amino acids include threonine, arginine, theanine, and taurine. Examples of cooling agents include 1-menthol. Only one of these components may be used, or two or more may be used in combination.

Preservatives and antibacterial agents include methylparaben, salicylic acid, and phenoxyethanol. By including phenoxyethanol, not only can the product have antibacterial properties but also an improved transparency in appearance.

In addition, zinc gluconate and other ingredients may be added to the hair dye composition to strengthen hair.

The hair dye composition of the present invention is composed of the above-mentioned components, and because it is not an emulsion system, it has good transparency and good visibility when applied.

The formulation of the hair dye composition of the present invention is not particularly limited, but can be provided, for example, as a cream formulation or a gel formulation. When the hair dye composition of the present invention is in gel formulation, it has good penetration into hair.

When the hair dye composition of the present invention is a semi-permanent hair dye, it can be used together with a clear agent that does not contain a dye. By mixing a clear agent with the hair dye composition of the present invention, or by mixing hair dye compositions containing different dyes, the color tone and color shade can be freely adjusted. In addition, the viscosity of the hair dye composition of the present invention can be set so that when the hair dye composition of the present invention is used alone, only the targeted area can be appropriately dyed, and when it is mixed with a clear agent, the viscosity is reduced so that it can be applied evenly.

The present invention provides a hair dyeing method comprising the steps of applying the hair dye composition to hair and washing the hair dye composition after dyeing. The hair dye composition can be applied to hair by any means. For example, the hair dye composition may be applied to hair by hand using gloved hands, or may be applied to hair using a comb or the like. The hair dye composition can also be washed after dyeing by any means, for example by rinsing the hair with water.

(Production of gel-type hair dye composition containing basic dye)
In Table 1, the left column shows components (A) to (C) of the present invention. The component column shows the names of the components. The values shown in each column of Examples 1 to 12 and Comparative Example 1 show the amount (mass%) of the components. The values shown in each row of Examples 1 to 12 and Comparative Example 1 for the visibility and elongation effect during hair dyeing show the panelist's evaluation. The A/B shown in the parameter column of Table 1 shows the content ratio of (A) direct dye/(B) nonionic surfactant with HLB of 15 or more. The gelling agent/B shown in the parameter column of Table 1 shows the content ratio of gelling agent/(B) nonionic surfactant with HLB of 15 or more.

The gel-type hair dye compositions manufactured in Examples 1 to 12 and Comparative Example 1 were used for hair dyeing according to the following procedure, and the visibility, spread and feel of the dyed hair were evaluated.

(Visibility)
Twenty expert panelists applied 2 g of each of the hair dye compositions of Examples 1 to 12 and Comparative Example 1 to an evaluation wig (black human hair, semi-long) using a hair dye brush to 1 g of hair, and evaluated the visibility of each composition according to the following criteria. The evaluation results are shown in the "Visibility" column of Table 1.

5: The agent did not become cloudy during application, and the degree and range of coloration were clearly distinguishable.
4: The agent rarely became cloudy during application, and the degree and range of coloration was roughly distinguishable.
3: The agent sometimes became cloudy during application, but the degree and range of coloration was easily distinguishable.
2: The agent became cloudy during application, making it difficult to distinguish the degree and range of coloration.
1: The agent became cloudy during application, and the degree of coloration was completely indistinguishable.

(Extended)
Twenty expert panelists applied 2 g of each of the hair dye compositions of Examples 1 to 12 and Comparative Example 1 to an evaluation wig (black human hair, semi-long) using a hair dye brush to 1 g of hair, and evaluated the spreadability of the compositions according to the following criteria. The evaluation results are shown in the "Spreadability" column in Table 1.
5: Spreads very well on hair.
4: Excellent spreadability on hair.
3: Spreads well on hair.
2: Spreadability on hair is slightly poor.
1: Poor spread on hair.

The visibility and elongation were evaluated by calculating the average scores of 20 expert panelists, and an average score of 4.6 or more was given a rating of "5", 3.6 to less than 4.6 was given a rating of "4", 2.6 to less than 3.6 was given a rating of "3", 1.6 to less than 2.6 was given a rating of "2", and less than 1.6 was given a rating of "1".

(Touch)
1 g of the hair dye composition according to the embodiment was applied to 1 g of human hair bundle with a brush and left at 30°C for 10 minutes. The hair bundle was then washed with Bigen Treatment Shampoo (manufactured by Hoyu Co., Ltd.) to wash off the hair dye composition. Next, Bigen Treatment Rinse (manufactured by Hoyu Co., Ltd.) was applied to the hair bundle. After rinsing the hair bundle to wash off the Bigen Treatment Rinse, the hair bundle was wiped dry with a towel and finally dried with a hair dryer. After drying the hair bundle dyed as described above with a hair dryer, 10 expert panelists evaluated the degree of finger-combability of the hair bundle by touch according to the following evaluation criteria. The average value of the scores of each expert panelist was rounded off to the nearest decimal place to determine the evaluation score for each feel. The evaluation results are shown in the "feel" column of Table 1.
5: Very good.
4: Very good.
3: Good.
2: Somewhat bad.
1: Bad.

All of the gel-type hair dye compositions of Examples 1 to 12 had excellent visibility during dyeing and excellent spreadability compared to Comparative Example 1. Furthermore, the gel-type hair dye compositions of Examples 1 to 4, 6, and 9 to 12 had excellent tactile evaluations after dyeing compared to the gel-type hair dye compositions of Examples 7, 8, and Comparative Example 1. This shows that the incorporation of PEG-20 sorbitan cocoate as a nonionic surfactant with an HLB of 15 or higher (B) does not deteriorate the tactile feel after dyeing.

(Production of hair dye composition containing acid dye)
When producing a hair dye composition containing an acid dye, a base material different from that used in the hair dye composition containing the basic dye is used. An example of the base material and dye formulation when an acid dye is used is shown in Table 2 below. In Table 2, the names of the ingredients are shown in the center column. The numbers in the right column indicate the amount (mass%) of each ingredient. The remaining amount is purified water, which makes the total 100%.

The hair dye composition of the present invention can be used as a hair dye.

Claims (6)

A hair dye composition comprising:
(A) a direct dye, and (B) a nonionic surfactant having an HLB value of 15 or more;
A hair dye composition comprising: The hair dye composition according to claim 1, further comprising (C) a lower alcohol. The hair dye composition according to claim 1 or 2, wherein the nonionic surfactant having an HLB value of 15 or more is a sorbitan fatty acid ester. The hair dye composition according to claim 1 or 2, which is used by rinsing after hair dyeing. The hair dye composition according to claim 1 or 2, wherein the hair dye composition is in a gel form. applying the hair dye composition according to claim 1 or 2 to hair;
A step of washing off the hair dye composition after dyeing the hair;
A hair dyeing method comprising: