JP2007063199A - Pretreatment agent composition of hair coloring - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pretreatment agent composition of hair coloring, preventing hair damage accompanied with hair-dyeing treatment without worsening the touch feeling of the hair, thereby preventing flowing out of a dye and improving preservability of the color. <P>SOLUTION: The pretreatment agent composition of the hair coloring contains (A) L-theanine and (B) a water-soluble polymer. Preferably, the composition contains (C) a water-soluble silicone besides them. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a hair dye pretreatment composition that suppresses hair damage during hair dyeing.

In recent years, with the diversification of hairstyles, the hair is often treated with hair treatment agents such as hair dyes, bleaches, permanent wave agents, hair straighteners, etc., and the hair tends to be damaged. It is in. When hair is damaged, it causes problems such as deterioration in color and further damage due to acid / alkaline agents, oxidizing agents, and the like. Conventionally, a hair treatment agent to be applied before the hair dyeing treatment described in Patent Document 1 is known. Such a hair treatment agent is blended with a protein hydrolyzate, and the hydrolyzate adsorbs to the hair, thereby repairing damage to the hair and improving color retention.
JP 2000-114644 A

  However, the conventional hair treatment agent has a problem that the feel of hair deteriorates when a large amount of protein hydrolyzate is used. Moreover, there existed a problem that the odor of a hair treatment agent deteriorated with the hydrolyzate of protein.

  As a result of the inventors' diligent research, the present invention has found that, by using L-theanine and a water-soluble polymer in combination in a hair dyeing pretreatment agent, hair damage associated with hair dyeing treatment is suppressed. It was made. The purpose of the hair dyeing pretreatment composition is to prevent hair damage associated with the hair dyeing treatment, thereby preventing the dye from flowing out and improving the color durability without deteriorating the feel of the hair. Is to provide.

In order to achieve the above object, the hair dyeing pretreatment composition of the invention described in claim 1 is characterized by containing (A) L-theanine and (B) a water-soluble polymer.
The invention according to claim 2 is the hair dyeing pretreatment composition according to claim 1, wherein 0.001 to 5% by mass of the (A) L-theanine is blended.

  The invention according to claim 3 is the hair dyeing pretreatment composition according to claim 1 or 2, further comprising (C) a water-soluble silicone.

  According to the present invention, in the pre-dyeing agent composition for hair dyeing, the hair damage associated with the hair dyeing treatment can be suppressed without deteriorating the feel of the hair, thereby preventing the dye from flowing out and improving the color retention. it can.

Hereinafter, an embodiment in which the hair dyeing pretreatment composition of the present invention is embodied will be described in detail.
The hair dyeing pretreatment composition of the present embodiment contains L-theanine as the component (A) and a water-soluble polymer as the component (B). In order to further improve hair damage suppression, it is preferable to further contain water-soluble silicone as the component (C). The hair dye pretreatment composition of this embodiment is applied to the hair before the hair dyeing treatment with the hair dye composition.

  L-theanine which is (A) component exhibits the effect which suppresses the damage of the hair by a hair dye composition by the synergistic effect with (B) water-soluble polymer. (A) L-theanine is a derivative of L-glutamic acid and is a kind of amino acid. This (A) L-theanine is a component that is abundantly contained in tea leaves, particularly gyokuro, and is known as an umami component of green tea. (A) L-theanine can be obtained by extraction from tea leaves by a conventional method or by chemical synthesis. Any (A) L-theanine of such natural origin and synthetic origin can be used for the hair dyeing pretreatment composition.

  The content of (A) L-theanine in the hair dyeing pretreatment composition is preferably 0.001 to 5 mass%, more preferably 0.005 to 3 mass%. If the content is less than 0.001% by mass, the damage suppressing effect due to the synergistic effect with (B) the water-soluble polymer may not be sufficiently exhibited. On the other hand, even if it exceeds 5 mass%, no further improvement in damage suppression effect can be obtained.

  (B) The water-soluble polymer exhibits an effect of suppressing hair damage by the hair dye composition due to a synergistic effect with (A) L-theanine. Examples of the water-soluble polymer (B) include natural polymers, semi-synthetic polymers, synthetic polymers, inorganic polymers, and the like.

  Specific examples of natural polymers include gum arabic, carrageenan, galactan, guar gum, quince seed gum, locust bean gum, tragacanth gum, pectin, mannan, starch, xanthan gum, dextran, curdlan, succinoglucan, gelatin, collagen, Casein, albumin, tamarind gum, brown algae extract and the like can be mentioned. Specific examples of the semisynthetic polymer include cellulose polymers such as methylcellulose, ethylcellulose, hydroxyethylcellulose, carboxymethylcellulose, hydroxypropylmethylcellulose, hydroxyethylcellulose dimethyldiallylammonium chloride, hydroxyethylcellulose hydroxypropyltrimethylammonium chloride; carboxymethyl starch, Examples thereof include starch polymers such as methyl starch and soluble starch; alginic acid polymers such as alginates and propylene glycol alginate; and guar gum polymers such as cationized guar gum. Specific examples of the synthetic polymer include carboxyvinyl polymer, polyacrylic acid amide, acrylic acid / alkyl methacrylate copolymer, polyvinyl alcohol, polyvinyl pyrrolidone, quaternized polyvinyl pyrrolidone, polyvinyl methyl ether, sodium polyacrylate, etc. Polyethylene oxide; ethylene oxide / propylene oxide block copolymer; cationized vinylpyrrolidone / dimethylaminoethyl methacrylate copolymer; homopolymer of dimethyldiallylammonium chloride; dimethyldiallylammonium chloride / acrylic acid copolymer And quaternary ammonium salt polymer derivatives such as coalescence. Specific examples of the inorganic polymer include bentonite, hectorite, anhydrous silicic acid, synthetic sodium silicate / magnesium, and the like. In the present invention, one or more of these can be used in combination.

  (B) The compounding quantity of water-soluble polymer is 0.01-15 mass% in a hair dye pretreatment agent composition, Preferably it is 0.05-10 mass%, More preferably, it is 0.1-5 mass%. . If it is less than 0.01% by mass, the effect of inhibiting damage due to the synergistic effect with (A) L-theanine cannot be obtained. On the other hand, even if it exceeds 15 mass%, no further improvement in damage suppression effect can be obtained.

  (C) Water-soluble silicone is formulated to improve the hair feel by improving (A) the hair damage suppression by L-theanine and improving the fingering and moisture of the hair. It is preferable. (C) Specific examples of the water-soluble silicone include pendant-type polyether-modified silicone, alternating copolymer-type polyether-modified silicone, terminal-modified polyether-modified silicone, glycerin-modified polyether-modified silicone, betaine-modified silicone, and polyether. Modified amino silicone, terminal cation modified silicone, etc. are mentioned. These water-soluble silicones may be blended singly or in combination of two or more.

  The content of the water-soluble silicone (C) in the hair cosmetic composition is preferably 0.001 to 10% by mass, more preferably 0.01 to 7% by mass, and still more preferably 0.05 to 5% by mass. is there. If the content is less than 0.001% by mass, the damage suppressing effect may not be obtained. On the other hand, if it exceeds 10% by mass, it is difficult to obtain further effects and the hair may become sticky.

As the other components, an oily component, a hydrocarbon, a polyhydric alcohol, a surfactant, a pH adjuster and the like can be blended in the hair dyeing pretreatment composition.
The oil component is preferably blended from the viewpoint of imparting moisture to the hair. Examples of the oil component include fats and oils, waxes, higher alcohols, higher fatty acids, alkyl glyceryl ethers, esters, silicones other than the above water-soluble silicones, and the like.

  As fats and oils, olive oil, camellia oil, shea fat, almond oil, tea seed oil, sasanqua oil, safflower oil, sunflower oil, soybean oil, cottonseed oil, sesame oil, beef fat, cacao butter, corn oil, peanut oil, rapeseed oil, Examples include rice bran oil, rice germ oil, wheat germ oil, pearl barley oil, grape seed oil, avocado oil, carrot oil, macadamia nut oil, castor oil, flaxseed oil, coconut oil, mink oil, egg yolk oil and the like. Examples of waxes include beeswax, candelilla wax, carnauba wax, jojoba oil, and lanolin.

  Higher alcohols include lauryl alcohol, myristyl alcohol, cetyl alcohol (cetanol), stearyl alcohol, cetostearyl alcohol, aralkyl alcohol, behenyl alcohol, 2-hexyldecanol, isostearyl alcohol, 2-octyldodecanol, decyltetradecanol, oleyl Alcohol, linoleyl alcohol, linolenyl alcohol, lanolin alcohol, etc. are mentioned. 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. It is done.

  Examples of the alkyl glyceryl ether include batyl alcohol (monostearyl glyceryl ether), chimyl alcohol (monocetyl glyceryl ether), selachyl alcohol (monooleyl glyceryl ether), and isostearyl glyceryl ether.

  Esters include diisopropyl adipate, diisobutyl adipate, dioctyl adipate, 2-hexyldecyl adipate, diisostearyl adipate, isopropyl myristate, cetyl octanoate, cetyl isooctanoate, isononyl isononanoate, isodecyl isononanoate , Isotridecyl isononanoate, diisopropyl sebacate, octyldodecyl myristate, isopropyl palmitate, butyl stearate, stearyl stearate, hexyl laurate, myristyl myristate, decyl oleate, hexyl decyl dimethyloctanoate, triisodecyl myristate, myristic acid Isostearyl, 2-ethylhexyl palmitate, octyldodecyl ricinoleate, fatty acid (C10-30) (choleste Lanylyl), lauryl lactate, cetyl lactate, myristyl lactate, octyldodecyl lactate, lanolin acetate, isocetyl stearate, isocetyl isostearate, cholesteryl 12-hydroxystearate, ethylene glycol di-2-ethylhexanoate, dipentaerythritol fatty acid Examples thereof include esters, N-alkyl glycol monoisostearate, cetyl caprate, glyceryl tricaprylate, neopentyl glycol dicaprate, diisostearyl malate, and lanolin derivatives.

  Examples of silicones include dimethylpolysiloxane, methylphenylpolysiloxane, fatty acid-modified polysiloxane, epoxy-modified silicone, fluorine-modified silicone, cyclic silicone, alkyl-modified silicone, methylhydrogen silicone, amino-modified silicone, ammonium-modified silicone, and highly polymerized amino acid. Examples thereof include modified silicone and terminal hydroxyl group-modified dimethylpolysiloxane.

  These oil components may be blended alone or in combination of two or more. The content of the oil component is preferably 0.01 to 50% by mass, more preferably 0.1 to 30% by mass.

  Examples of the hydrocarbon include α-olefin oligomer, light isoparaffin, light liquid isoparaffin, liquid isoparaffin, liquid paraffin, squalane, polybutene, paraffin, polyethylene powder, microcrystalline wax, petrolatum and the like.

  Examples of the polyhydric alcohol include glycols and glycerins. Examples of glycols include ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, dipropylene glycol, isoprene glycol, and 1,3-butylene glycol. Examples of glycerins include glycerin, diglycerin, and polyglycerin.

  The surfactant is blended as an emulsifier or solubilizer to maintain the stability of the hair dye pretreatment composition. Examples of the surfactant include nonionic surfactants, cationic surfactants, anionic surfactants, and amphoteric surfactants.

  Specific examples of the nonionic surfactant include polyoxyethylene (hereinafter referred to as POE) alkyl ethers, POE alkylphenyl ethers, POE / polyoxypropylene alkyl ethers, POE sorbitan fatty acid esters, POE propylene glycol fatty acid. Examples thereof include esters and aliphatic alkanolamides.

  Cationic surfactants include lauryl trimethyl ammonium chloride, cetyl trimethyl ammonium chloride, stearyl trimethyl ammonium chloride, alkyl trimethyl ammonium chloride, distearyl dimethyl ammonium chloride, cetyl trimethyl ammonium bromide, stearyl trimethyl ammonium bromide, ethyl lanolin sulfate fatty acid Examples thereof include aminopropylethyldimethylammonium, stearyltrimethylammonium saccharin, cetyltrimethylammonium saccharin, and methyl behenyltrimethylammonium sulfate.

  Examples of anionic surfactants include alkyl sulfates such as sodium lauryl sulfate, POE alkyl sulfates such as POE lauryl ether sodium sulfate, alkyl sulfate esters such as lauryl sulfate triethanolamine, stearoylmethyl taurine sodium, dodecylbenzenesulfonic acid Examples include triethanolamine, sodium tetradecenesulfonate, POE lauryl ether phosphate and salts thereof, N-lauroyl glutamates, and N-lauroylmethyl-β-alanine salts.

  Examples of amphoteric surfactants include 2-undecyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine sodium, cocoamidopropyl betaine, lauryldimethylaminoacetic acid betaine.

  Examples of the pH adjuster include citric acid and 2-amino-2-methyl-1-propanol. In addition, water is mix | blended with the hair dye pretreatment composition as the solvent or dispersion medium of each said component, and the density | concentration of each component is adjusted. The pH of the hair dyeing pretreatment composition is preferably weakly acidic, that is, pH 3 or more and less than 7 (25 ° C.). By making the pH weakly acidic, the effect of (A) L-theanine adsorbing on the hair can be sufficiently exhibited.

Furthermore, as other components, preservatives such as methylparaben and phenoxyethanol, ceramides, vitamins, PPTs, chelating agents, fragrances and the like can be blended.
The hair dyeing pretreatment composition can be made into a liquid, mist, gel, foam, cream or other dosage form. This hair dyeing pretreatment composition may be used after being applied to the hair and washed off with water or warm water, or the same composition adhering to the hair may be used without being washed away with water or warm water. From the viewpoint that the sustainability in the hair repair effect can be sufficiently exhibited, it is preferable to use the hair dye pretreatment composition after applying it to the hair without washing it away with water or warm water. Specifically, before applying the hair dyeing treatment, the hair dyeing pretreatment composition of the present embodiment is applied and dried by natural drying or using a dryer or the like, and then the hair dyeing treatment is performed by the hair dye composition. preferable.

  The hair dye pretreatment composition of this embodiment is applied to the hair before the hair dye composition is applied. Next, the hair dye composition applied after the hair dye pretreatment composition of this embodiment is applied will be described.

Examples of the hair dye composition include an oxidative hair dye treatment agent containing an oxidative dye and a direct hair dye treatment agent containing a direct dye. First, the oxidative hair dye treatment agent will be described.
The oxidative hair dye treatment agent is a first oxidative hair dye as the first agent (hereinafter referred to as first hair dye) and a second oxidative hair dye as the second agent (hereinafter referred to as second hair dye). It is composed of. The first hair dye contains an alkali agent, a dye, and the like. The second dyeing agent contains an oxidizing agent and the like.

First, the hair dye second agent will be described.
The oxidant is blended to decolorize melanin contained in the hair and oxidize an oxidative dye intermediate or the like as a dye blended in the first hair coloring agent to develop a color. Examples of the oxidizing agent include potassium bromate, sodium bromate, sodium perborate and hydrogen peroxide. The blending amount is preferably 0.1 to 15.0% by mass, based on 100% by mass of the total amount of the second dyeing agent.

Next, the hair dye 1st agent is demonstrated.
The first agent for dyeing contains an alkali agent, a dye, and other components. The alkaline agent is blended in order to promote the action of the oxidizing agent and to improve the dye permeability to the hair by swelling the hair and to improve the dyeability. Specific examples of the alkali agent include ammonia, alkanolamine, ammonium salt, organic amines (2-amino-2-methyl-1,3-propanediol, guanidine, etc.), inorganic alkali (sodium hydroxide, potassium hydroxide, Sodium carbonate, potassium carbonate, etc.), basic amino acids (arginine, lysine, etc.) and their salts.

  These alkaline agents may be blended singly or in combination of two or more. The blending amount of the alkaline agent is preferably set to an amount such that the pH of the hair dye first agent is in the range of 8-12. If the pH of the first dyeing agent is less than 8, the action of hydrogen peroxide may not be sufficiently promoted when the first dyeing agent is mixed with the second dyeing agent. On the other hand, when the pH exceeds 12, problems such as damage to the hair tend to occur when the hair dye treatment agent is applied to the hair.

  Specific examples of the dye contained in the first hair coloring agent include oxidation dye intermediates, direct dyes, resorcin, pyrogallol, catechol, m-aminophenol, m-phenylenediamine, 2,4-diaminophenol, 1,2 , 4-benzenetriol, toluene-3,4-diamine, toluene-2,4-diamine, hydroquinone, α-naphthol, 2,6-diaminopyridine, 1,5-dihydroxynaphthalene, 5-aminoorthocresol, paramethyl Aminophenol, 2,4-diaminophenoxyethanol, gallic acid, tannic acid, ethyl gallate, methyl gallate, propyl gallate, pentaploid, 5- (2-hydroxyethylamino) -2-methylphenol and salts thereof Can be mentioned.

  The oxidation dye intermediate dyes hair by being oxidized by an oxidation agent such as hydrogen peroxide contained in the second dyeing agent. Specific examples of the oxidation dye intermediate include phenylenediamines (excluding m-phenylenediamine), aminophenols (excluding m-aminophenol and 2,4-diaminophenol), toluylenediamine. , Diphenylamines, diaminophenylamines, N-phenylphenylenediamines, diaminopyridines, salts thereof and the like. Examples of the salt include hydrochloride, sulfate, acetate and the like.

  Among oxidative dye intermediates, p-phenylenediamine, p-toluylenediamine, N, N-bis (2-hydroxyethyl) -p-phenylenediamine, N-phenyl-p-phenylenediamine due to strong hair dyeing power 4,4′-diaminodiphenylamine, 2-chloro-p-phenylenediamine, N, N-dimethyl-p-phenylenediamine, p-aminophenol, o-aminophenol, 2,6-dichloroparaphenylenediamine, p- At least one selected from aminophenylsulfamic acid and salts thereof is preferable. These oxidation dye intermediates may be blended alone or in combination of two or more.

  The content of the dye in the first hair dyeing agent is preferably 0.01 to 15.0% by mass. If the content is less than 0.01% by mass, sufficient hair dyeing power cannot be obtained. On the other hand, even if it exceeds 15.0 mass%, it is difficult to obtain a higher hair dyeing power.

Next, the direct hair coloring treatment agent will be described. The direct hair dyeing agent is blended with a direct dye, and preferably an acid, an aromatic alcohol, or the like.
Direct dyes are formulated to dye hair. This direct dye is non-reactive and can be colored by itself. Specific examples of direct dyes include nitro dyes, acid dyes, basic dyes (cationic dyes), and disperse dyes.

  The nitro dye is preferably 4-nitro-o-phenylenediamine, 2-nitro-p-phenylenediamine, 2-amino-4-nitrophenol, 2-amino-5-nitrophenol, because of its excellent hair dyeing power. Picramic acid, picric acid and their salts, 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 Orenge No.1, HC Orenge No.2, HC Orenge 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. .

  As acid dyes, 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. 202, Red No. 227, Red 230 (1), Red 230 (2), Red 231, Red 232, Red 401, Red 502, Red 503, Red 504, Red 506, Yellow 4 and Yellow 5 Yellow 202 (1), Yellow 202 (2), Yellow 203, Yellow 402, Yellow 403 (1), Yellow 406, Yellow 407, Orange 205, Orange 207 , Daido 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 201 and black 401 And the like.

  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 99, 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 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 Violet 10, Basic Violet 11: 1, Basic Violet 14, Basic Violet 16, Basic Yellow 11, Basic Yellow 28, Basic Yellow 57, Basic Yellow 87, and the like.

  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, Disperse Violet 15 etc. are mentioned.

  Other direct dyes include 1-amino-4-methylanthraquinone, 1,4-diaminoanthraquinone, and salts thereof, HC Blue No. 4, HC Blue No. 7, HC Blue No. 8, HC Blue No. 14, HC Brown No.1, HC Brown No.2, HC Green No.1, HC Orenge No.5, HC Red No.8, HC Red No.9, HC Yellow No.7, HC Yellow No.8, In addition, the direct dyes defined by the “Ministerial Ordinance for Determining Tar Colors that can be Used in Pharmaceuticals” (announced in 1966, Ministry of Health and Welfare) are included. These direct dyes may be blended singly or in combination of two or more.

  The content of the direct dye is preferably 0.01 to 0.3% by mass, more preferably 0.05 to 0.2% by mass, and most preferably 0.1 to 0.2% by mass. If the content of the direct dye is less than 0.01% by mass, sufficient hair coloring power may not be obtained. On the other hand, if it exceeds 0.3% by mass, the dispersibility of the direct dye is lowered and precipitation may occur.

  The acid is preferably blended as a pH adjuster in order to improve the hair dyeing power and dyeing fastness. Specific examples of the acid include inorganic acids and organic acids. Examples of inorganic acids include hydrochloric acid, sulfuric acid, nitric acid, acetic acid, phosphoric acid and the like. Examples of the organic acid include levulinic acid, lactic acid, glycolic acid, and citric acid.

  The aromatic alcohol is preferably blended in order to improve the penetration of active ingredients such as direct dyes into the hair. Specific examples of the aromatic alcohol include benzyl alcohol, benzyloxyethanol, phenoxyethanol and the like.

  The content of the aromatic alcohol is preferably 0.1 to 10% by mass, more preferably 0.5 to 10% by mass, and most preferably 1 to 5% by mass. If the content of the aromatic alcohol is less than 0.1% by mass, the penetration of the active ingredient into the hair may not be promoted. On the other hand, even if it exceeds 10% by mass, it is difficult to obtain a further penetration promoting effect.

  As other components that can be blended in the oxidative hair dye treatment agent and the direct hair dye treatment agent, the oily components, hydrocarbons, polyhydric alcohols, surfactants, pH exemplified in the hair pretreatment composition of this embodiment Other components such as regulators and preservatives can be mentioned.

  The dosage forms of these oxidative hair dye treatment agents and direct hair dye treatment agents are not particularly limited, such as aqueous solutions, dispersions, liquids such as emulsions, emulsions, gels, foams, creams, powders, and the like. In the case of a foam form or the like, the hair dye treatment agent may contain a propellant such as liquefied petroleum gas (LPG).

Next, the effect | action of the hair dyeing pretreatment composition of this embodiment comprised as mentioned above is demonstrated.
The hair treatment composition of this embodiment is applied to the hair before the hair dye composition is applied. First, the hair dyeing pretreatment composition of the present invention is applied using an applicator such as a brush or a comb, and dried or naturally dried using a dryer or the like. By the pretreatment with the hair dyeing pretreatment composition, (A) L-theanine exerts a binding force such as a hydrogen bond or a hydrophobic bond with a protein in the hair, thereby causing interaction and adsorption. Thereafter, (B) the water-soluble polymer immobilizes (A) L-theanine on the hair protein. Next, a hair dyeing treatment is performed with the hair dye composition. Hair damage due to an acid / alkali agent, an oxidizing agent, etc. in the hair dyeing treatment is suppressed by the components (A) and (B). Moreover, by suppressing the damage to the hair, the loss of the dye from the hair is suppressed, the color life of the hair color is improved, and the discoloration of the hair color is suppressed.

According to the embodiment described in detail above, the following effects are exhibited.
(1) The hair dyeing pretreatment composition of this embodiment contains L-theanine as the component (A) and a water-soluble polymer as the component (B). Therefore, (A) L-theanine adsorbs to proteins in hair and (B) water-soluble polymer immobilizes (A) L-theanine to hair proteins. Thereby, the damage of the hair by subsequent hair dyeing process can be suppressed.

(2) Moreover, since the damage of hair is suppressed, the outflow of dye from the hair can be suppressed, and the color retention effect and discoloration reduction effect of the hair color are improved.
(3) In this embodiment, water-soluble silicone was further blended as the component (C). Therefore, the hair damage preventing effect of the component (A) and the component (B) can be further improved.

(4) Moreover, the touch of hair is improved by improving the fingering property and moisture feeling of hair.
The above embodiment can be modified as follows.

  -The hair dye pre-treatment composition of the above embodiment may be configured to simultaneously contain, store and use components (A) to (C) which are active ingredients, and be prepared and stored separately. In addition, mixing and adjustment may be performed immediately before use.

  -The hair dye pretreatment composition of this embodiment is a hair treatment agent such as normal undamaged hair, an oxidative hair dye, an acid hair dye, a bleaching agent, a permanent wave agent, a hair straightener, etc. The present invention may be applied to hair treated with the above hair treatment agent, for example, hair damaged by ultraviolet rays or the like. Since L-theanine also has a hair damage repairing action, it effectively acts on the damaged part of keratin and exerts a repairing effect on the damaged hair. Furthermore, since the binding state of L-theanine to such hair is stable, it has a long-lasting repair effect.

  -The hair dye composition used in the said embodiment was comprised as the hair dye 1st agent and the hair dye 2nd agent, and set it as the structure mixed just before use. However, each component constituting the first hair dyeing agent and the second hair dyeing agent may be separated into three or more agents. For example, the hair dyeing agent which consists of the hair dye 1 agent which mix | blends oxidation dye, the hair dye 2 agent which mix | blends an alkaline agent, and the hair dye 3 agent which mix | blends an oxidizing agent is mentioned. In such a configuration, the storage stability of the oxidation dye can be enhanced by configuring the oxidation dye separately from the second dyeing agent in which the alkaline agent is blended. Moreover, you may comprise as 1 agent type which mixes and prepares each component which comprises a hair dyeing treatment agent immediately before use.

Next, the embodiment will be described more specifically with reference to examples and comparative examples.
(Examples 1-20, Comparative Examples 1-8)
The components shown in Tables 1 and 2 were mixed to prepare each hair dyeing pretreatment composition. Each hair dye pretreatment composition is applied to a human black hair bundle using an applicator such as a brush or a comb and dried with a dryer. Next, the oxidative hair dye comprised from the 1st agent containing the oxidation dye shown below and an alkali agent, etc. and the 2nd agent containing an oxidant etc. is adjusted. These first agent and second agent were mixed at a mass ratio of 1: 1, and the mixture was applied to the human black hair bundle subjected to the pretreatment, and then allowed to stand for 20 minutes. Thereafter, the mixture adhering to the human black hair bundle was washed with water and dried to give the human black hair bundle a hair dyeing treatment. By using the human black hair bundles treated with the respective hair dye pretreatment compositions and the oxidative hair dye, the following effects of color retention and discoloration of the hair color, and touch after the hair color (roughness) The reduction effect is evaluated, and the evaluation results are shown in Tables 1 and 2.

  The composition of the oxidative hair dye used in this example is as shown below. In addition, the water-soluble silicone shown in Table 3 was used as the water-soluble silicone (C) used in each example and comparative example. In Tables 1 and 2, the unit of the numerical value indicating the blending amount of each component is mass%.

<Oxidative hair dye>
(First agent) Mass%
Paraphenylenediamine 0.2
Resorcin ... 1.0
Paraaminophenol ... 0.5
2,6-diaminopyridine ... 0.2
Cetyl alcohol ... 5.0
Polyethylene glycol ... 5.0
Polyoxyethylene (20) cetyl ether, 8.0
Sodium lauryl sulfate ... 1.2
Strong ammonia water (28%) …… 5.0
Ascorbic acid 0.5
Purified water ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Remaining amount (second agent)
Hydrogen peroxide (35%) ... 17.0
Purified water ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Remaining amount <Hair coloring effect>
The human black hair bundle treated with the hair dye pretreatment composition and the oxidative hair dye of each example was washed 20 times with a shampoo, and then the panel was visually observed by comparing the color strength of the hair with that before washing. Evaluated. Excellent color retention effect: ◎, somewhat excellent: ◯, slightly inferior: △, inferior: ×, the evaluation of the color retention effect of the hair color.

<Hair color change reduction effect>
The human black hair bundle treated with the hair dye pretreatment composition and the oxidative hair dye of each example was stored in a constant temperature and humidity chamber (25 ° C., relative humidity 55%) for 5 days, and then immediately after the panel was visually dyed. The following criteria were evaluated by comparing the color tone of the hair. Excellent in discoloration reduction effect: 、, somewhat excellent: ○, slightly inferior: Δ, inferior: ×, the evaluation of the discoloration reduction effect of hair color.

<Feeling (Stiffness reduction effect)>
When the human black hair bundle treated with the hair dye pretreatment composition and the oxidative hair dye of each example is touched by the paneler by hand, the touch is very good: ◎, if good: ○, if slightly bad: △ When bad, it was set as the evaluation result of touch as x.

表１，２に示されるように、（Ａ）Ｌ−テアニンと（Ｂ）水溶性高分子が併用される各実施例においては、手触りが向上するとともに色持ち、変色低減効果に優れることが確認される。また、さらに（Ｃ）水溶性シリコーンが配合されることにより、手触り、色持ち、変色低減効果がより向上することが確認される。一方、比較例１，２の（Ａ）Ｌ−テアニン又は（Ｂ）水溶性高分子を単独で使用した場合、比較例６の（Ａ）Ｌ−テアニンと非水溶性高分子（アクリル樹脂アルカノールアミン）を併用した場合、比較例３，４，５，７，８の他のアミノ酸を使用した場合、色持ち効果及び変色低減効果は向上しないことが確認される。

As shown in Tables 1 and 2, in each Example in which (A) L-theanine and (B) water-soluble polymer were used in combination, it was confirmed that the touch was improved and the color retention and discoloration reduction effect was excellent. Is done. Further, it is confirmed that (C) water-soluble silicone is further blended to improve the touch, color retention, and discoloration reducing effects. On the other hand, when (A) L-theanine of Comparative Examples 1 and 2 or (B) water-soluble polymer was used alone, (A) L-theanine and water-insoluble polymer of Comparative Example 6 (acrylic resin alkanolamine) ) In combination, it is confirmed that the color retention effect and the color change reduction effect are not improved when other amino acids of Comparative Examples 3, 4, 5, 7, and 8 are used.

Next, technical ideas that can be grasped from the above-described embodiment and other examples will be described below together with their effects.
(A) A hair dyeing pretreatment composition applied to hair damaged by a hair treatment agent. Therefore, according to the invention described in (a), it is possible to prevent the cumulative accumulation of hair damage by hair treatment such as regular hair dyeing treatment.

  (B) In the method of using the hair dye pretreatment composition, hair dyeing comprising a step of applying a hair dye pretreatment composition to hair, a step of drying treatment, and a step of hair dyeing treatment Use method of pretreatment agent composition. According to the invention described in (b), the effect of preventing hair damage by the active ingredient can be sufficiently exhibited.

Claims (3)

  A hair dye pretreatment composition comprising (A) L-theanine and (B) a water-soluble polymer.   The hair dyeing pretreatment composition according to claim 1, wherein 0.001 to 5% by mass of (A) L-theanine is blended.   The hair dyeing pretreatment composition according to claim 1 or 2, further comprising (C) a water-soluble silicone.