Single-agent air-oxidative hair coloring product and method for producing single-agent air-oxidative hair coloring product

Abstract

A single-agent air-oxidative hair coloring product according to an aspect of the present disclosure contains (A) gallic acid or a derivative thereof, (B) an alkalizing agent, and (C) an oxidative dye. A method for producing a single-agent air-oxidative hair coloring product containing a plurality of components including (A) gallic acid or a derivative thereof, (B) an alkalizing agent, and (C) an oxidative dye according to another aspect of the present disclosure comprises: adding component (A) to a stirring tank and stirring; adding component (B) to the stirring tank and stirring; and adding component (C) to the stirring tank and stirring. In another aspect of the present disclosure, component (A) is added to the stirring tank and stirred before component (B) is added to the stirring tank or after component (B) is added to the stirring tank and stirred.

Description

One-component air oxidation hair color and method for producing the same CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This international application claims the benefit of Japanese Patent Application No. 2024-057017, filed with the Japan Patent Office on March 29, 2024, the entire disclosure of which is incorporated herein by reference.

[0002] FIELD OF THE DISCLOSURE The present disclosure relates to a one-component air oxidation hair color.

[0003] For example, Patent Document 1 discloses a one-component air oxidation hair color containing an alkaline agent and an oxidation dye. The one-component air oxidation hair color dyes hair by oxidatively polymerizing the oxidation dye using oxygen in the air to develop color.

[0004] Japanese Patent Application Publication No. 7-309732

[0005] It is preferable that the one-component air oxidation hair color has excellent deep dyeing ability.

[0006] One aspect of the present disclosure preferably provides a one-component air oxidation hair color that contains gallic acid and has excellent deep dyeing ability.

[0007] One aspect of the present disclosure is a one-component air oxidation hair color containing (A) gallic acid or a derivative thereof, (B) an alkaline agent, and (C) an oxidation dye. This configuration provides a one-component air oxidation hair color containing gallic acid and having excellent deep dyeing properties.

[0008] Another aspect of the present disclosure is a method for producing a one-component air oxidation hair color containing multiple components, including (A) gallic acid or a derivative thereof, (B) an alkaline agent, and (C) an oxidation dye. The method for producing a one-component air oxidation hair color includes adding and stirring component (A) to an agitation tank, adding and stirring component (B) to the agitation tank, and adding and stirring component (C) to the agitation tank. Component (A) is added and stirred to the agitation tank before component (B) is added to the agitation tank or after component (B) is added to the agitation tank and stirred. This configuration allows for the provision of a one-component air oxidation hair color containing gallic acid and exhibiting excellent deep dyeing properties.

[0009] Exemplary embodiments of the present disclosure will now be described.

[0010] 1. One-component air oxidation hair color (1-1) Composition of one-component air oxidation hair color One-component air oxidation hair color is a hair color that is composed of a single component and dyes hair using oxygen in the air. One-component air oxidation hair color includes hair colors in which the single component is applied directly to hair, and hair colors in which the single component is mixed with a solvent such as water and then applied to hair.

[0011] [(A) Gallic Acid or Its Derivative] The one-component air oxidation hair color contains (A) gallic acid or a derivative thereof (hereinafter referred to as component (A)). Component (A) functions as an oxidizing agent that oxidatively polymerizes component (C), which will be described later, when the one-component air oxidation hair color comes into contact with air.

[0012] The blending amount of component (A) is preferably 0.1% by mass or more, and more preferably 0.5% by mass or more. In this specification, unless otherwise specified, the blending amount refers to the mass ratio relative to the total mass of the one-component air oxidation hair color. When the blending amount of component (A) is 0.1% by mass or more, the one-component air oxidation hair color has even better deep dyeing ability. Deep dyeing ability refers to the ability to dye hair deeply. When the blending amount of component (A) is 0.5% by mass or more, the one-component air oxidation hair color has even better deep dyeing ability.

[0013] The blending amount of component (A) is preferably 4% by mass or less, and more preferably 2% by mass or less. When the blending amount of component (A) is 4% by mass or less, the one-component air oxidation hair color has even better formulation stability. Formulation stability refers to the property of a formulation that is resistant to deterioration even when stored for a long period of time. Examples of formulation deterioration include separation of the aqueous phase and the oil phase.

[0014] [(B) Alkaline Agent] The one-component air oxidation hair color contains (B) an alkaline agent (hereinafter referred to as component (B)). Component (B) promotes oxidative polymerization of component (C) when the one-component air oxidation hair color comes into contact with air. Therefore, component (B) contributes to deep dyeing.

[0015] Component (B) preferably contains (b1) alkanolamine (hereinafter referred to as component (b1)). In particular, component (B) preferably contains at least one of monoethanolamine (i.e., 2-aminoethanol), triethanolamine, and monoisopropanolamine (i.e., 1-amino-2-propanol) as component (b1), and more preferably contains monoethanolamine. When component (b1) is contained as component (B), a one-component air oxidation hair color has even better deep dyeing and even dyeing properties. Even dyeing properties refer to the ability to dye hair evenly. When a one-component air oxidation hair color has excellent even dyeing properties, uneven dyeing is suppressed. Examples of components (B) other than component (b1) include ammonia.

[0016] The blending amount of component (B) is preferably 0.1% by mass or more, more preferably 1% by mass or more, and particularly preferably 2% by mass or more. When the blending amount of component (B) is 0.1% by mass or more, the one-component air oxidation hair color has even better deep dyeing ability.

[0017] The blending amount of component (B) is preferably 10% by mass or less, more preferably 5% by mass or less, and particularly preferably 4% by mass or less. When the blending amount of component (B) is 10% by mass or less, the one-component air oxidation hair color has even better dye leveling ability.

[0018] [(C) Oxidation Dye] The one-component air oxidation hair color contains (C) an oxidation dye (hereinafter referred to as component (C)). Component (C) includes, for example, a dye intermediate that develops color by oxidative polymerization of itself and a coupler that develops color by oxidative polymerization with the dye intermediate.

[0019] The dye intermediate is difficult to develop color when the one-component air oxidation hair color is filled in a container and is not in contact with air. For example, when the one-component air oxidation hair color is discharged from the container, component (A) functions as an oxidizing agent in the presence of oxygen in the air, causing the dye intermediate to undergo oxidative polymerization and develop color.

[0020] The dye intermediates include dye precursors, which are mainly ortho- or para-phenylenediamines or aminoethanols, and the dye intermediates themselves are colorless or weakly colored.

[0021] Specific examples of dye intermediates include 1-hydroxyethyl-4,5-diaminopyrazole, paraphenylenediamine, paratoluylenediamine (i.e., toluene-2,5-diamine), N-phenylparaphenylenediamine, 4,4'-diaminodiphenylamine, orthoaminophenol, paraaminophenol, N,N-bis(2-hydroxyethyl)paraphenylenediamine, 2-hydroxyethylparaphenylenediamine, orthochloroparaphenylenediamine, 4-aminometacresol, 2-amino-4-hydroxyethylaminoanisole, 2,4-diaminophenol, and salts thereof. Examples of salts include sulfates and hydrochlorides. A one-component air oxidation hair color may contain, for example, one type of dye intermediate, or two or more types of dye intermediates.

[0022] The coupler undergoes oxidative polymerization with the dye intermediate to develop color, for example, when the one-component air oxidation hair color is dispensed from a container. The coupler preferably contains at least one of (c1) a compound represented by formula (I), its derivative, or a salt (hereinafter referred to as component (c1)), and (c2) meta-aminophenol (hereinafter referred to as component (c2)). Component (c1) and component (c2) are more likely to contribute to deep dyeing than other couplers.

[0023]

[0024] (In formula (I), R １ and R ３ are each independently an amino group or a hydroxy group, and R ２ is an alkyl group or a hydroxyalkoxy group.

[0025] Component (c1) preferably contains at least one of 5-(2-hydroxyethylamino)-2-methylphenol, 2,4-diaminophenoxyethanol, and 5-aminoorthocresol, and may also contain, for example, a salt thereof. Examples of salts include sulfates and hydrochlorides. When component (c1) contains at least one of 5-(2-hydroxyethylamino)-2-methylphenol, 2,4-diaminophenoxyethanol, and 5-aminoorthocresol, the one-component air oxidation hair color exhibits even greater deep dyeing ability.

[0026] Examples of component (C) other than components (c1) and (c2) include resorcinol, meta-aminophenol, α-naphthol (i.e., 1-naphthol), meta-phenylenediamine, toluene-3,4-diamine, 2,6-diaminopyridine, diphenylamine, N,N-diethyl meta-aminophenol, phenylmethylpyrazolone, 1,5-dihydroxynaphthalene, and salts thereof. Examples of salts include hydrochlorides and sulfates. One-component air oxidation hair colors may contain, for example, one type of coupler, or two or more types of couplers.

[0027] The blending amount of component (C) is preferably 0.1% by mass or more, more preferably 1% by mass or more, and particularly preferably 2% by mass or more. When the blending amount of component (C) is 0.1% by mass or more, the one-component air oxidation hair color has even better deep dyeing ability.

[0028] The blending amount of component (C) is preferably 15% by mass or less, more preferably 10% by mass or less, and particularly preferably 6% by mass or less. When the blending amount of component (C) is 15% by mass or less, the one-component air oxidation hair color has even better formulation stability.

[0029] When a one-component air oxidation hair color contains a dye intermediate and component (c1) as component (C), the blending amount of component (c1) is preferably 0.01% by mass or more, more preferably 0.05% by mass or more, and particularly preferably 0.1% by mass or more. When the blending amount of component (c1) is 0.01% by mass or more, the one-component air oxidation hair color has even better deep dyeing ability.

[0030] When a one-component air oxidation hair color contains a dye intermediate and component (c1) as component (C), the blending amount of component (c1) is preferably 3% by mass or less, more preferably 1% by mass or less, and particularly preferably 0.3% by mass or less. When the blending amount of component (c1) is 0.3% by mass or less, the one-component air oxidation hair color has even better formulation stability.

[0031] When a one-component air oxidation hair color contains a dye intermediate and component (c2) as component (C), the blending amount of component (c2) is preferably 0.01% by mass or more, more preferably 0.1% by mass or more, even more preferably 0.3% by mass or more, and particularly preferably 0.5% by mass or more. When the blending amount of component (c2) is 0.01% by mass or more, the one-component air oxidation hair color has even better deep dyeing ability.

[0032] When a one-component air oxidation hair color contains a dye intermediate as component (C) and component (c2), the blending amount of component (c2) is preferably 3% by mass or less, more preferably 2% by mass or less, and particularly preferably 1% by mass or less. When the blending amount of component (c2) is 3% by mass or less, the one-component air oxidation hair color has even better formulation stability.

[0033] It is preferable that (A) / (C) is 0.05 or more and 1.0 or less. (A) / (C) is the ratio of the amount of component (A) to the amount of component (C). In other words, (A) / (C) is the value obtained by dividing the amount of component (A) by the amount of component (C). When (A) / (C) is 0.05 or more and 1.0 or less, the one-component air oxidation hair color can achieve a good balance between deep dyeing ability and formulation stability.

[0034] [(D) Hydrocarbons that are solid at 25°C] The one-component air oxidation hair color further contains, for example, (D) a hydrocarbon that is solid at 25°C (hereinafter referred to as component (D)). Component (D) further improves formulation stability. Examples of component (D) include petrolatum, paraffin, polyethylene, microcrystalline wax, and isoparaffin. Among these, component (D) preferably contains petrolatum. When component (D) contains petrolatum, the one-component air oxidation hair color has even better formulation stability.

[0035] When the one-component air oxidation hair color contains component (D), the blending amount of component (D) is preferably 0.05% by mass or more, and more preferably 0.1% by mass or more. When the blending amount of component (D) is 0.05% by mass or more, the one-component air oxidation hair color has even better formulation stability.

[0036] When the one-component air oxidation hair color contains component (D), the blending amount of component (D) is preferably 1% by mass or less, and more preferably 0.50% by mass or less. When the blending amount of component (D) is 0.50% by mass or less, the one-component air oxidation hair color has even better hair applicability. Hair applicability refers to the ease of spreading the product on hair, etc.

[0037] When a one-component air oxidation hair color contains component (D), (A) / (D) is preferably 50 or less. (A) / (D) is the ratio of the amount of component (A) to the amount of component (D). In other words, (A) / (D) is the value obtained by dividing the amount of component (A) by the amount of component (D). When (A) / (D) is 50 or less, the one-component air oxidation hair color has even better formulation stability. (A) / (D) is preferably 0.01 or more. When (A) / (D) is 0.01 or more, the one-component air oxidation hair color has even better deep dyeing ability.

[0038] [(E) Reducing Agent] The one-component air oxidation hair color further contains, for example, a (E) reducing agent (hereinafter referred to as component (E)). When the one-component air oxidation hair color contains component (C), component (E) suppresses oxidative polymerization of component (C) during production of the one-component air oxidation hair color or when filling the one-component air oxidation hair color into a container. Examples of component (E) include ascorbic acid and anhydrous sodium sulfite.

[0039] When the one-component air oxidation hair color contains component (E), the blending amount of component (E) is preferably 0.01% by mass or more, and more preferably 0.05% by mass or more. When the blending amount of component (E) is 0.01% by mass or more, oxidative polymerization of component (C) is further suppressed, for example, during the production of the one-component air oxidation hair color or when the one-component air oxidation hair color is filled into a container.

[0040] When the one-component air oxidation hair color contains component (E), the blending amount of component (E) is preferably 0.5% by mass or less, more preferably 0.3% by mass or less, and particularly preferably 0.2% by mass or less. When the blending amount of component (E) is 0.5% by mass or less, the one-component air oxidation hair color has even better deep dyeing and even dyeing ability.

[0041] [Surfactant] The one-component air oxidation hair color further contains, for example, a surfactant. The surfactant further improves the stability of the formulation. Examples of surfactants include nonionic surfactants, anionic surfactants, cationic surfactants, and amphoteric surfactants. In the following description, POE represents a polyoxyethylene chain, POP represents a polyoxypropylene chain, and the numbers in parentheses following these represent the number of moles added.

[0042] Examples of nonionic surfactants include POE alkyl ethers, POE alkylphenyl ethers, POE-POP alkyl ethers, POE sorbitan fatty acid esters, POE monofatty acid esters, POE glycerin fatty acid esters, polyglycerin fatty acid esters, monoglycerin fatty acid esters, sorbitan fatty acid esters, sucrose fatty acid esters, alkyl polyglucosides, etc. Specific examples of POE alkyl ethers include POE lauryl ether, POE cetyl ether, POE stearyl ether, POE behenyl ether, POE lanolin, POE phytosterol, etc.

[0043] When the one-component air oxidation hair color contains a nonionic surfactant, the amount of the nonionic surfactant is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, and particularly preferably 1% by mass or more. When the one-component air oxidation hair color contains a nonionic surfactant, the amount of the nonionic surfactant is preferably 10% by mass or less, more preferably 7.5% by mass or less, and particularly preferably 5% by mass or less. When the amount of the nonionic surfactant is 0.1% by mass or more but 10% by mass or less, the one-component air oxidation hair color has even better formulation stability.

[0044] Examples of cationic surfactants include alkyl quaternary ammonium salts, amine salts, cyclic quaternary ammonium salts, and benzethonium chloride. Specific examples of alkyl quaternary ammonium salts include monoalkyl quaternary ammonium salts, dialkyl quaternary ammonium salts, trialkyl quaternary ammonium salts, benzalkonium quaternary ammonium salts, and monoalkyl ether quaternary ammonium salts. Specific examples of amine salts include alkylamine salts, fatty acid amide amine salts, ester-containing tertiary amine salts, and Arcobale tertiary amine salts. Specific examples of cyclic quaternary ammonium salts include alkylpyridinium salts and alkylisoquinolium salts. From the viewpoint of formulation stability, alkyl quaternary ammonium salts are preferred, with monoalkyl quaternary ammonium salts and dialkyl quaternary ammonium salts being more preferred, and monoalkyl quaternary ammonium salts being particularly preferred.

[0045] Examples of monoalkyl quaternary ammonium salts include lauryltrimethylammonium chloride, lauryltrimethylammonium bromide, alkyl(16,18)trimethylammonium chloride, cetyltrimethylammonium chloride, cetyltrimethylammonium bromide, cetyltrimethylammonium saccharin, stearyltrimethylammonium chloride, stearyltrimethylammonium bromide, behenyltrimethylammonium chloride, stearyltrimethylammonium saccharin, alkyl(28)trimethylammonium chloride, diPOE(2)oleylmethylammonium chloride, diPOEstearylmethylammonium chloride, POE(1)POP(25)diethylmethylammonium chloride, POPmethyldiethylammonium chloride, methacryloyloxyethyltrimethylammonium chloride, behenyltrimethylammonium methylsulfate, etc. Among these, from the viewpoint of formulation stability, stearyltrimethylammonium chloride, alkyl(16,18)trimethylammonium chloride, cetyltrimethylammonium chloride, and behenyltrimethylammonium chloride are preferred.

[0046] Examples of dialkyl quaternary ammonium salts include dialkyl(12-15)dimethylammonium chloride, dialkyl(12-18)dimethylammonium chloride, dialkyl(14-18)dimethylammonium chloride, dicocoyldimethylammonium chloride, dicetyldimethylammonium chloride, distearyldimethylammonium chloride, and isostearyllauryldimethylammonium chloride.

[0047] Examples of anionic surfactants include alkyl ether sulfates, POE alkyl ether sulfates, alkyl sulfates, alkenyl ether sulfates, alkenyl sulfates, olefin sulfonates, alkanesulfonates, saturated or unsaturated fatty acid salts, alkyl or alkenyl ether carboxylates, α-sulfonic acid salts, N-acylamino acid surfactants, phosphate mono- or diester surfactants, sulfosuccinate esters, etc. The counter ion of the anionic group of these surfactants may be, for example, any of sodium ion, potassium ion, and triethanolamine.

[0048] Examples of amphoteric surfactants include amino acid type amphoteric surfactants and betaine type amphoteric surfactants.

[0049] Specific examples of amino acid type amphoteric surfactants include N-lauroyl-N'-carboxymethyl-N'-hydroxyethylethylenediamine sodium (i.e., sodium lauroamphoacetate), 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine, undecylhydroxyethylimidazolinium betaine sodium, alkyldiaminoethylglycine hydrochloride, N-coconut oil fatty acid acyl-N'-carboxyethyl-N'-hydroxyethylethylenediamine sodium, N-coconut oil fatty acid acyl-N'-carboxyethoxyethyl-N and glycine type amphoteric surfactants such as N-coconut oil fatty acid acyl-N'-carboxymethoxyethyl-N'-carboxymethylethylenediamine disodium, lauryldiaminoethylglycinate sodium, palm oil fatty acid acyl-N-carboxyethyl-N-hydroxyethylethylenediamine sodium; and aminopropionic acid type amphoteric surfactants such as sodium laurylaminopropionate, sodium laurylaminodipropionate, and triethanolamine laurylaminopropionate.

[0050] Specific examples of betaine-type amphoteric surfactants include aminoacetic acid betaine-type amphoteric surfactants such as coconut oil alkyl betaine, lauryl dimethyl aminoacetic acid betaine, myristyl dimethyl aminoacetic acid betaine, stearyl dimethyl aminoacetic acid betaine, sodium stearyl dimethyl betaine, coconut oil fatty acid amidopropyl betaine, palm oil fatty acid amidopropyl betaine, lauric acid amidopropyl betaine, ricinoleic acid amidopropyl betaine, and stearyl dihydroxyethyl betaine; and sulfobetaine-type amphoteric surfactants such as lauryl hydroxysulfobetaine.

[0051] [Oily Component Other Than Component (D)] The one-component air oxidation hair color may further contain an oily component other than component (D). Examples of oily components other than component (D) include fats and oils, waxes, hydrocarbons other than component (D), higher fatty acids, alkyl glyceryl ethers, ester oils, silicones, and fluorinated oils.

[0052] The fats and oils are triglycerides, i.e. triesters of fatty acids and glycerin. Specific examples of the fats and oils include olive oil, rosehip oil, camellia oil, shea butter, macadamia nut oil, almond oil, tea seed oil, camellia oil, safflower oil, sunflower oil, soybean oil, cottonseed oil, sesame oil, beef tallow, cacao butter, corn oil, peanut oil, rapeseed oil, rice bran oil, rice germ oil, wheat germ oil, Job's tears oil, grape seed oil, avocado oil, carrot oil, castor oil, linseed oil, coconut oil, mink oil, and egg yolk oil.

[0053] Waxes are esters of higher fatty acids and higher alcohols. Specific examples of waxes include beeswax (written in kanji as beeswax), candelilla wax, carnauba wax, jojoba oil, lanolin, spermaceti, rice bran wax, sugarcane wax, palm wax, montan wax, cotton wax, bayberry wax, ivotaro wax, kapok wax, and shellac wax.

[0054] Specific examples of hydrocarbons other than component (D) include liquid paraffin, α-olefin oligomers, synthetic squalane, squalane, hydrogenated squalane, limonene, and turpentine oil.

[0055] Specific examples of higher fatty acids include lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, isostearic acid, hydroxystearic acid, 12-hydroxystearic acid, oleic acid, undecylenic acid, linoleic acid, ricinoleic acid, and lanolin fatty acid.

[0056] Specific examples of alkyl glyceryl ethers include batyl alcohol, chimyl alcohol, selachyl alcohol, and isostearyl glyceryl ether.

[0057] Specific examples of ester oils include diisopropyl adipate, isopropyl myristate, isononyl isononanoate, octyldodecyl myristate, isopropyl palmitate, stearyl stearate, myristyl myristate, isotridecyl myristate, 2-ethylhexyl palmitate, octyldodecyl ricinoleate, cholesteryl / lanosteryl fatty acids having 10 to 30 carbon atoms, cetyl lactate, lanolin acetate, ethylene glycol di-2-ethylhexanoate, pentaerythritol fatty acid esters, dipentaerythritol fatty acid esters, cetyl caprate, glyceryl tricaprylate, diisostearyl malate, dioctyl succinate, cetyl 2-ethylhexanoate (i.e., cetyl ethylhexanoate), and hydrogenated castor oil isostearate.

[0058] Silicone is a synthetic polymer in which silicon and oxygen atoms with organic groups are alternately linked by chemical bonds. Specific examples of silicones include dimethylpolysiloxane (INCI name: dimethicone), dimethylpolysiloxane with hydroxyl terminal groups (INCI name: dimethiconol), methylphenylpolysiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, polyether-modified silicone, highly polymerized silicone with an average degree of polymerization of 650 to 10,000, amino-modified silicone, betaine-modified silicone, alkyl-modified silicone, alkoxy-modified silicone, mercapto-modified silicone, carboxy-modified silicone, and fluorine-modified silicone.

[0059] [Polyhydric Alcohol] The one-component air oxidation hair color may further contain, for example, a polyhydric alcohol. Examples of polyhydric alcohols include glycol and glycerin. Specific examples of glycols include ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, dipropylene glycol, polyethylene glycol (e.g., PEG 400, PEG 1000, PEG 1500, PEG 1540, etc.), polypropylene glycol, isoprene glycol, 1,3-butylene glycol, etc. Specific examples of glycerin include glycerin, diglycerin, polyglycerin, etc.

[0060] [Direct Dyes] The one-component air oxidation hair color may further contain, for example, a direct dye. The direct dye is a dye that does not dye hair by reacting with other components, but develops color by itself and directly dyes hair. Examples of direct dyes include acid dyes, basic dyes, natural dyes, nitro dyes, HC dyes, and disperse dyes.

[0061] Specific 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. 227, Red No. 230 (1), Yellow No. 4, Yellow No. 5, Yellow No. 202 (1), Yellow No. 202 (2), Yellow No. 203, Orange No. 205, Orange No. 207, Orange No. 402, Green No. 3, Green No. 204, Green No. 401, Purple No. 401, Blue No. 1, Blue No. 2, Blue No. 202, Brown No. 201, and Black No. 401.

[0062] Specific examples of basic dyes include Basic Blue 3, Basic Blue 6, Basic Blue 7, Basic Blue 9, Basic Blue 26, Basic Blue 41, Basic Blue 47, Basic Blue 75, Basic Blue 99, Basic Blue 124, Basic Brown 4, Basic Brown 16, Basic Brown 17, Basic Green. 1, Basic Green 4, Basic Orange 1, Basic Orange 2, Basic Orange 31, Basic Red 1, Basic Red 2, Basic Red 22, Basic Red 46, Basic Red 51, Basic Red 76, Basic Red 118, Basic Violet 1, Basic Violet 3, Basic Violet 4, Basic Examples include Violet 10, Basic Violet 11:1, Basic Violet 14, Basic Violet 16, Basic Yellow 11, Basic Yellow 28, Basic Yellow 57, and Basic Yellow 87.

[0063] Specific examples of natural dyes include gardenia dye, turmeric dye, annatto dye, sodium copper chlorophyllin, paprika dye, lac dye, and henna.

[0064] Specific examples of nitro dyes include 4-nitroorthophenylenediamine, 2-nitroparaphenylenediamine, 2-amino-4-nitrophenol, 2-amino-5-nitrophenol, picramic acid, picric acid, and salts thereof.

[0065] Specific examples of HC dyes include HC Blue No.2, HC Blue No.5, HC Blue No.6, HC Blue No.9, HC Blue No.10, HC Blue No.11, HC Blue No.12, HC Blue No.13, HC Blue No.16, HC Orange No.1, HC Orange No.2, HC Orange No.3, HC Red No.1, HC Red No.3, HC Red No.7, HC Red No.10, HC Red. No.11, HC Red No.13, HC Red No.14, HC Violet No.1, HC Violet No.2, HC Yellow No.2, HC Yellow No.4, HC Yellow No.5, HC Yellow No.6, HC Yellow No.9, HC Yellow No.10, HC Yellow No.11, HC Yellow No.12, HC Yellow No.13, HC Yellow No.14, HC Yellow No.15, etc.

[0066] Specific 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 Violet 1, Disperse Violet 4, and Disperse Violet 15.

[0067] [Other Components] The one-component air oxidation hair color may contain other components as needed, such as solvents, sugars such as sorbitol and maltose, preservatives such as phenoxyethanol and sodium benzoate, chelating agents such as ethylenediaminehydroxyethyltriacetate trisodium dihydrate and hydroxyethanediphosphonic acid tetrasodium solution, pH adjusters, hair growth ingredients, plant extracts, herbal extracts, amino acids / peptides, urea, vitamins, fragrances, and UV absorbers.

[0068] [pH] The pH of the one-component air oxidation hair color is preferably 7 or higher, more preferably 8 or higher, and particularly preferably 9 or higher. When the pH of the one-component air oxidation hair color is 7 or higher, the one-component air oxidation hair color has even better deep dyeing ability.

[0069] The pH of the one-component air oxidation hair color is preferably 11 or less, more preferably 10.5 or less, and particularly preferably 10 or less. When the pH of the one-component air oxidation hair color is 11 or more, the one-component air oxidation hair color has even better dye leveling ability.

[0070] [Form] The form of the one-component air oxidation hair color is not particularly limited. However, the form of the one-component air oxidation hair color when applied to hair is preferably liquid, gel, or foam, and more preferably foam. The form when applied to hair refers to the form when the color is applied to hair.

[0071] From the viewpoint of deep dyeing ability, it is preferable that the one-component air oxidation hair color is in a foam form when applied to hair. Examples of one-component air oxidation hair colors that are in a foam form when applied to hair include one-component air oxidation hair colors that are in a foam form when dispensed from a container (i.e., dispensed in a foam form from a container) and one-component air oxidation hair colors that become a foam by being foamed when applied to hair.

[0072] Specific examples of configurations in which a single-component air oxidation hair color is dispensed in foam form from a container include a shaker container filled with the single-component air oxidation hair color, a non-aerosol product, and an aerosol product. For example, a shaker container filled with the single-component air oxidation hair color is shaken before dispensing, thereby forming the single-component air oxidation hair color into foam. For example, non-aerosol products can employ various configurations, such as a squeeze foamer type or a pump foamer type. Aerosol products will be described in detail below.

[0073] When the one-component air oxidation hair color is in a foam state when applied to hair, the contact area between the one-component air oxidation hair color and air increases, which allows component (A) to function more easily as an oxidizing agent in the one-component air oxidation hair color, thereby further improving the deep dyeing ability.

[0074] (1-2) Method for Producing a One-Part Air Oxidation Hair Color A one-part air oxidation hair color can be produced by mixing the components of the one-part air oxidation hair color. A preferred method for producing a one-part air oxidation hair color is a method that involves performing the following steps (i) to (iii) in this order (hereinafter referred to as the specific production method).

[0075] (i) The specified components, excluding components (A), (B), and (C), are added to a stirring tank and stirred. (ii) Under vacuum conditions, a mixture of components (A) and (C) is added to the stirring tank and stirred. (iii) Under vacuum conditions, component (B) is added to the stirring tank and stirred.

[0076] The predetermined component in the above step (i) is also referred to as a base part, and the base part includes, for example, a solvent.

[0077] In the specific production method, steps (ii) and (iii) are carried out under vacuum conditions. This prevents component (A) from functioning as an oxidizing agent during the production of the one-component air oxidation hair color. Furthermore, in the specific production method, steps (ii) and (iii) are separate processes. That is, component (A) is added to the stirring tank and stirred before component (B) is added to the stirring tank. This reduces the likelihood of component (A) and component (B) coming into contact during the production of the one-component air oxidation hair color, further preventing component (A) from functioning as an oxidizing agent. Therefore, when using the specific production method, oxidative polymerization of component (C) by component (A) can be prevented during the production of the one-component air oxidation hair color.

[0078] In the specific manufacturing method, in the above step (ii), a mixed solution of component (A) and component (C) is added to a stirring tank and mixed. That is, component (A) and component (C) are added to a stirring tank at the same time and mixed. However, component (A) and component (C) do not necessarily have to be added to a stirring tank at the same time. For example, component (C) may be added to a stirring tank and mixed in the above step (i) (i.e., before component (A) is added to a stirring tank). In other words, component (C) may be included in, for example, a base portion.

[0079] Furthermore, for example, not only steps (ii) and (iii) but also step (i) may be carried out under vacuum conditions, which further suppresses oxidative polymerization of component (C) by component (A) during the production of the one-component air oxidation hair color.

[0080] Furthermore, for example, the steps (i), (ii), and (iii) do not necessarily have to be performed under vacuum conditions, and for example, these steps may be performed under an atmosphere of an inert gas such as nitrogen gas.

[0081] For example, the method for producing a one-component air oxidation hair color may be performed in the order of (i), (iii), and (ii). That is, component (A) may be added to a stirring tank and stirred after component (B) has been added to the stirring tank. Even in this case, component (A) can be prevented from oxidatively polymerizing component (C) during the production of the one-component air oxidation hair color. However, the specific production method is more effective at preventing component (A) from oxidatively polymerizing component (C) during the production of the one-component air oxidation hair color.

[0082] (1-3) Effects of the One-Part Air Oxidation Hair Color The one-part air oxidation hair color contains components (A), (B), and (C), and is excellent in deep dyeing ability.

[0083] When the one-component air oxidation hair color is in foam form when applied to the hair, the one-component air oxidation hair color has better dye depth.

[0084] When the blending amount of component (C) is 1% by mass or more and the ratio (A) / (C) is 0.05 or more and 1.0 or less, the one-component air oxidation hair color can achieve a good balance between deep dyeing ability and formulation stability.

[0085] When component (C) contains a dye intermediate and a coupler, and the coupler contains component (c1), the one-component air oxidation hair color has even greater deep dyeing ability.Furthermore, when component (c1) contains at least one of 5-(2-hydroxyethylamino)-2-methylphenol, 2,4-dimethylphenoxyethanol, and 5-aminoorthocresol, the one-component air oxidation hair color has even greater deep dyeing ability.

[0086] When component (C) contains a dye intermediate and a coupler, the coupler contains component (c2), and the blending amount of component (c2) is 0.5 mass% or more, the one-component air oxidation hair color has even better deep dyeing ability.

[0087] When the one-component air oxidation hair color further contains component (D), the formulation stability is even more excellent. Furthermore, when the (A) / (D) ratio is 50 or less, the one-component air oxidation hair color has even more excellent formulation stability.

[0088] When the component (B) contains the component (b1), the deep dyeing ability can be further improved in a one-component air oxidation hair color.

[0089] When the one-component air oxidation hair color further contains component (E) and the blending amount of component (E) is 0.3 mass% or less, the one-component air oxidation hair color has even better deep dyeing ability and even dyeing ability.

[0090] When a one-component air oxidation hair color further contains a nonionic surfactant, the formulation stability is even better.

[0091] 2. Aerosol Product (2-1) Structure of Aerosol Product The aerosol product includes, for example, a known aerosol container. In one example, the aerosol container is filled with a mixture of a single-component air oxidation hair color and a propellant. In another example, the aerosol container is filled with a propellant, and a pouch filled with a single-component air oxidation hair color is placed inside the propellant. In other words, the propellant is filled between the outer surface of the pouch and the inner surface of the aerosol container.

[0092] The one-component air oxidation hair color has the composition described above in the section "1. One-component air oxidation hair color." The one-component air oxidation hair color contains at least component (A), component (B), and component (C).

[0093] Examples of propellants include liquefied petroleum gas (LPG) and nitrogen gas.

[0094] For example, a mixture of a single-component air oxidation hair color and a propellant is dispensed from an aerosol container. After dispensing, the propellant evaporates. The dispensed single-component air oxidation hair color becomes foam. That is, the aerosol product dispenses a foam of the single-component air oxidation hair color.

[0095] (2-2) Effects of Aerosol Products Aerosol products easily shield the contained one-component air oxidation hair color from the air. In an aerosol product, when the one-component air oxidation hair color is contained (i.e., before the one-component air oxidation hair color is dispensed), component (A) is prevented from functioning as an oxidizing agent and oxidatively polymerizing component (C). Therefore, when the one-component air oxidation hair color is dispensed, the aerosol product can easily oxidatively polymerize component (C). Therefore, aerosol products have excellent deep dyeing properties.

[0096] In addition, the aerosol product dispenses a foam-like one-component air oxidation hair color. Because the foam-like one-component air oxidation hair color increases the contact area between the one-component air oxidation hair color and the air, as described above, component (A) can more easily function as an oxidizing agent. This also explains why the aerosol product has excellent deep dyeing properties.

[0097] The aerosol product also provides benefits from the one-component air oxidation hair color it contains.

[0098] 3. Examples (3-1) Production of One-Part Air Oxidation Hair Color The components shown in Tables 1 to 3 were mixed in the amounts (mass %) shown in Tables 1 to 3 to produce the one-part air oxidation hair colors of Examples 1 to 22 and Comparative Examples 1 and 2. The specific production method described above was used to produce the one-part air oxidation hair color. The pH of the one-part air oxidation hair color was 9.7. The pH of the one-part air oxidation hair color was measured using a pH meter immediately after diluting the one-part air oxidation hair color with water to 10%. A pH-METER F-22 manufactured by HORIBA was used as the pH meter.

[0099] Next, the single-component air oxidation hair color produced for each Example and Comparative Example was filled into a known aerosol container. The aerosol container was then crimped, and a propellant was poured into the aerosol container until the mass ratio of the single-component air oxidation hair color to the propellant reached 95:5. The propellant was LPG. In this manner, the aerosol products were produced.

[0100]

[0101]

[0102]

[0103] (3-2) Evaluation Method of One-Part Air Oxidation Hair Color For each Example and Comparative Example, the one-part air oxidation hair color was evaluated for deep dyeing, even dyeing, and formulation stability. Furthermore, for each Example and Comparative Example, the formulation of the one-part air oxidation hair color dispensed from the aerosol product was evaluated. The evaluation method was as follows. The evaluation results are shown in Tables 1 to 3.

[0104] [Deep dyeing] Approximately 1.5 g of a one-component air oxidation hair color was dispensed from an aerosol container onto a dish and applied to a 1 g white hair bundle sample with a length of 10 cm using a brush. The hair bundle sample to which the one-component air oxidation hair color was applied was left in a thermostatic chamber at 30°C for 30 minutes and then washed with water. The washed hair bundle sample was then dried with warm air to obtain a hair bundle sample for evaluation. The one-component air oxidation hair color of Comparative Example 1 was prepared by the above method and used as a reference hair bundle sample.

[0105] Five expert panelists visually observed the evaluation hair bundle sample and the reference hair bundle sample, and evaluated whether or not the evaluation hair bundle sample had darkened based on the color depth when compared with the reference hair bundle sample. Specifically, each panelist scored on the following six-point scale. The average of the evaluation scores of the five panelists was calculated, and the average value was rounded to one decimal place to obtain the evaluation value.

[0106] 6 points: Extremely darkened. 5 points: Significantly darkened. 4 points: Generally darkened. 3 points: Slightly darkened. 2 points: Almost no darkening (same as the reference sample). 1 point: No darkening at all.

[0107] [Even dyeing] In the same manner as in the evaluation of deep dyeing, an evaluation hair bundle sample and a reference hair bundle sample were prepared. Five expert panelists visually observed the evaluation hair bundle sample and the reference hair bundle sample, and evaluated whether or not the evaluation hair bundle sample was evenly dyed based on the variation in color depth within the hair bundle sample when compared with the reference hair bundle sample. Specifically, each panelist scored using the following three levels.

[0108] 3 points: Significantly leveled. 2 points: Generally leveled. 1 point: Not leveled (same as the reference sample).

[0109] The average of the evaluation scores of the five panelists was calculated, and an average value of 2.5 or more was assigned an "A" rating, an average value of 1.5 or more but less than 2.4 was assigned a "B" rating, and an average value of less than 1.5 was assigned a "C" rating.

[0110] [Formulation Stability] 30 g of one-component air oxidation hair color was placed in a No. 4 standard bottle and stored in a thermostatic chamber at 50°C for one month. Five expert panelists then visually observed the state of separation between the aqueous and oil phases of the one-component air oxidation hair color and evaluated the formulation stability according to the following criteria. The average of the evaluation scores of the five panelists was calculated, and the average was rounded to one decimal place to obtain the evaluation score.

[0111] 6 points: no separation at all. 5 points: almost no separation. 4 points: not much separation. 3 points: slight separation. 2 points: some separation. 1 point: significant separation.

[0112] [Form of One-Part Air Oxidation Hair Color] The form of the one-part air oxidation hair color dispensed from the aerosol product was observed.

[0113] (3-3) Evaluation Results of the One-Part Air Oxidation Hair Color The one-part air oxidation hair color of each Example containing component (A), component (B), and component (C) was excellent in the solubility of component (A), deep dyeing ability, even dyeing ability, and formulation stability. In the aerosol products of each Example, the dispensed one-part air oxidation hair color was in the form of a foam.

[0114] The single-component air oxidation hair colors of Examples 1 to 14 and 17 to 22 contained 1% or more by mass of component (C), and the (A) / (C) ratio was 0.05 or more and 1.0 or less. The single-component air oxidation hair colors of Examples 1 to 14 and 17 to 22 were superior in deep dyeing ability. Of these Examples, the single-component air oxidation hair colors of Examples 1 to 6, 8, 9, 11 to 14, 17, and 19 to 22 were also superior in formulation stability. Of these Examples, the single-component air oxidation hair colors of Examples 7, 10, and 18 also had excellent formulation stability, but were evaluated as having lower formulation stability than Examples 1 to 6, 8, 9, 11 to 14, and 17 to 22. The relatively low formulation stability evaluation results of Examples 7 and 10 are thought to be due to the absence of component (D). The relatively low evaluation result of the formulation stability of Example 18 was thought to be due to the (A) / (D) ratio being greater than 50.

[0115] The one-component air oxidation hair colors of Examples 1 to 11, 13 to 15, and 17 to 22 contained a dye intermediate and at least one of the components (c1) and (c2) as the component (C). The one-component air oxidation hair colors of Examples 1 to 11, 13 to 15, and 17 to 22 were superior in deep dyeing ability. Specifically, compared with the one-component air oxidation hair color of Example 12, which did not contain either the component (c1) or the component (c2), the one-component air oxidation hair color of Example 10, which contained the component (c1), and Example 11, which contained the component (c2), were evaluated as having a deep dyeing ability that was one level higher. Compared to the one-component air oxidation hair colors of Examples 10 and 11, which contained only one of component (c1) and component (c2), the one-component air oxidation hair color of Example 1, etc., which contained both component (c1) and component (c2), achieved an even higher dye depth evaluation result by one level.

[0116] The one-component air oxidation hair colors of Examples 1 to 9, 11, 15, and 17 to 22 contained a dye intermediate as component (C) and component (c2), and the blending amount of component (c2) was 0.5% by mass or more. The one-component air oxidation hair colors of Examples 1 to 9, 11, 15, and 17 to 22 were even more excellent in deep dyeing ability.

[0117] The one-component air oxidation hair color of Example 14 also contained a dye intermediate as component (C) and component (c2), and although the blending amount of component (c2) was 0.5% by mass or more, the evaluation result showed that the dyeing ability was low when compared with Examples 1 to 9, 11, 15, and 17 to 22. This was thought to be due to the content of component (A) being less than 0.5% by mass.

[0118] The one-component air oxidation hair colors of Examples 1 to 6, 8, 9, 11 to 14, and 16 to 22, which contained component (D), had superior formulation stability. Among these, the one-component air oxidation hair colors of Examples 1 to 6, 8, 9, 11 to 14, 17, and 19 to 22, which had an (A) / (D) ratio of 50 or less, had even superior formulation stability.

[0119] Although the one-component air oxidation hair color of Example 15 also contained component (D), the evaluation result showed that the formulation stability was lower than that of Examples 1 to 6, 8, 9, 11 to 14, and 16 to 22. This was thought to be due to the (A) / (C) ratio being greater than 1.0.

[0120] The one-component air oxidation hair colors of Examples 1, 2, 4 to 8, 10, 15, and 17 to 22, which contained component (b1) as the (B) component, were superior in deep dyeing. A comparison was made between the one-component air oxidation hair colors of Examples 1 to 3, which had the same content of components other than component (B). The one-component air oxidation hair colors of Examples 1 and 2, which contained component (b1), were one level higher in deep dyeing than the one-component air oxidation hair color of Example 3, which did not contain component (b1).

[0121] Although the one-component air oxidation hair color of Examples 9, 11 to 14, and 16 also contained component (b1) as component (B), they were evaluated as having poor dyeing ability compared to Examples 1, 2, 4 to 8, 10, 15, and 17 to 22. The relatively low evaluation result for dyeing ability in Example 9 is thought to be due to the absence of component (E). The relatively low evaluation result for dyeing ability in Examples 11 and 12 is thought to be due to the type of component (C) contained. The relatively low evaluation result for dyeing ability in Example 13 is thought to be due to the total content of component (C). The relatively low evaluation result for dyeing ability in Example 14 is thought to be due to the content of component (A). The relatively low evaluation result for dyeing ability in Example 16 is thought to be due to the content of component (A), the type and total content of component (C) contained, and the ratio (A) / (C).

[0122] The one-component air oxidation hair colors of Examples 1, 2, 4 to 7, 10, 15, and 17 to 22 contained component (E), but the content was 0.3% by mass or less. The one-component air oxidation hair colors of Examples 1, 2, 4 to 7, 10, 15, and 17 to 22 were superior in both deep dyeing and even dyeing. Specifically, compared with the one-component air oxidation hair color of Example 8, which contained 0.5% by mass of component (E), and Example 9, which did not contain component (E), the one-component air oxidation hair colors of Examples 1, 2, 4 to 7, 10, 15, and 17 to 22 achieved an even dyeing evaluation result that was one level higher. The one-component hair color of Example 9 developed color during preparation due to the absence of component (E), and as a result, the evaluation result for even dyeing was the same as that of Example 8, which contained 0.5% by mass of component (E).

[0123] The one-component air oxidation hair color of Example 3 also contained component (E), but its content was 0.3% by mass or less. However, compared to Examples 1, 2, 4 to 7, 10, 15, and 17 to 22, it was evaluated as having low dyeing levelness. This was thought to be due to the absence of component (b1) as the (B) component. Examples 11 to 14, and 16 also contained component (E), but its content was 0.3% by mass or less. However, compared to Examples 1, 2, 4 to 7, 10, 15, and 17 to 22, it was evaluated as having low dyeing deepness. The reasons for the relatively low dyeing deepness evaluation results of these Examples are thought to be as described above.

[0124] The one-component air oxidation hair color of Comparative Example 1, which did not contain component (A), was inferior in deep dyeing and even dyeing. The one-component air oxidation hair color of Comparative Example 2, which did not contain component (B), was inferior in the solubility of component (A), deep dyeing, even dyeing, and formulation stability. The one-component air oxidation hair color of Comparative Example 2 was also inferior in the solubility of component (A). In the aerosol products of each Comparative Example, the dispensed one-component air oxidation hair color was in the form of a foam.

[0125] 4. Other Examples

[0112] The components shown in Tables 4 and 5 were mixed in the amounts (% by mass) shown in Tables 4 and 5 to produce single-component air oxidation hair colors of Examples 23 and 24.

[0126]

[0127]

[0128] The formulations of the one-component air oxidation hair colorants of Examples 23 and 24 were observed immediately after production. The formulation of the one-component air oxidation hair colorant of Example 23 was in powder form immediately after production. The formulation of the one-component air oxidation hair colorant of Example 24 was in gel form immediately after production.

[0129] The deep dyeing ability of the one-component air oxidation hair colors of Examples 23 and 24 was evaluated in a manner generally similar to that of Example 1.

[0130] However, the evaluation hair bundle sample of Example 23 was prepared as follows. First, the one-component air oxidation hair color of Example 23 and water were mixed at a mass ratio of 1:10. Approximately 1.5 g of the mixture was placed on a plate and applied to a 10 cm-long white hair bundle sample (1 g) using a brush. In other words, the one-component air oxidation hair color of Example 23 was in liquid form when applied to hair. Then, the evaluation hair bundle sample of Example 23 was obtained using the same procedure as in Example 1, etc.

[0131] The evaluation hair bundle sample of Example 24 was prepared as follows. First, approximately 1.5 g of the one-component air oxidation hair color of Example 24 was placed on a plate and applied to a 10 cm long white hair bundle sample of 1 g using a brush. In other words, the one-component air oxidation hair color of Example 24 was in a gel form when applied to hair. Then, the evaluation hair bundle sample of Example 24 was obtained using the same procedure as in Example 1.

[0132] The one-component air oxidation hair colors of Examples 23 and 24 were superior to Comparative Examples 1 and 2 in deep dyeing ability.

[0133] 5. Technical Concept In addition to the one-component air oxidation hair color and the method for manufacturing the one-component air oxidation hair color described above, the present disclosure can also be realized in various forms, such as an aerosol product that ejects a foamy one-component air oxidation hair color, or a treatment method using a one-component air oxidation hair color.

Claims

1. A one-component air oxidation hair color containing (A) gallic acid or a derivative thereof, (B) an alkaline agent, and (C) an oxidation dye.

2. The one-component air oxidation hair color according to claim 1, which is in the form of a foam when applied to hair.

3. A one-component air oxidation hair color according to claim 1 or 2, wherein the amount of component (C) is 1 mass% or more, and the ratio of the amount of component (A) to the amount of component (C), (A) / (C), is 0.05 or more and 1.0 or less.

4. A one-component air oxidation hair color according to any one of claims 1 to 3, wherein the component (C) comprises a dye intermediate and a coupler, and the coupler comprises at least one of (c1) a compound represented by the following formula (I), a derivative or salt thereof, and (c2) meta-aminophenol, and when the component (C) comprises the component (c2), the blending amount of the component (c2) is 0.5 mass% or more. (In formula (I), R １ and R ３ are each independently an amino group or a hydroxy group, and R ２ is an alkyl group or a hydroxyalkoxy group.

5. The one-component air oxidation hair color according to claim 4, wherein the coupler contains component (c1), and component (c1) contains at least one of 5-(2-hydroxyethylamino)-2-methylphenol, 2,4-diaminophenoxyethanol, and 5-aminoorthocresol.

6. A one-component air oxidation hair color according to any one of claims 1 to 5, further comprising (D) a hydrocarbon that is solid at 25°C.

7. The one-component air oxidation hair color according to claim 6, wherein the ratio (A) / (D), which is the ratio of the amount of component (A) to the amount of component (D), is 50 or less.

8. A one-component air oxidation hair color according to any one of claims 1 to 7, wherein the component (B) includes (b1) an alkanolamine.

9. A one-component air oxidation hair color according to any one of claims 1 to 8, further comprising a reducing agent (E), wherein the amount of component (E) blended is 0.3 mass% or less.

10. A method for producing a one-component air oxidation hair color containing multiple components including (A) gallic acid or a derivative thereof, (B) an alkaline agent, and (C) an oxidation dye, comprising: adding component (A) to a stirring tank and stirring; adding component (B) to the stirring tank and stirring; and adding component (C) to the stirring tank and stirring; wherein component (A) is added to the stirring tank and stirred before component (B) is added to the stirring tank or after component (B) is added to the stirring tank and stirred.

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