JP2008308442A - Composition for treating hair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a composition for treating the hair, improving the elasticity of hair in the vicinity of its root while imparting moist feeling to the hair. <P>SOLUTION: The composition for treating hair contains (A) L-theanine and (B) at least one kind selected from an oligosaccharide and a derivative thereof, e.g. at least one kind selected from raffinose, trehalose, sucrose, maltose, cellobiose, palatinose, xylooligosaccharide, fructooligosaccharide, galactooligosaccharide, maltooligosaccharide, inulooligosaccharide, lactosucrose and glucosyltrehalose. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a hair treatment composition containing, for example, an oligosaccharide.

In hair treatment compositions such as hair treatments, shampoos, rinses and hair dye compositions, oligosaccharides are generally known as components for imparting moisture retention to hair. Patent document 1 discloses the composition for hair treatment which mix | blended the oligosaccharide. Patent Document 1 discloses, for example, maltose and agarooligosaccharide obtained by hydrolyzing agarose with agarase as oligosaccharide. These oligosaccharides bind to the hair surface made of keratin protein and give the hair a moist feeling. Patent Document 2 discloses a hair styling agent that uses an oligosaccharide and a synthetic polymer such as polyvinylpyrrolidone in combination. A high setting power is imparted to the hair by the synthetic polymer blended in the hairdressing agent, and various hairstyles can be formed.
JP-A-8-151313 JP 2005-206483 A

  However, the hair treatment composition disclosed in Patent Document 1 has a problem that the moisture feeling of the hair may be excessive because the oligosaccharide has a high moisturizing effect. For this reason, there is a problem that the entire hair becomes heavy and the elasticity of the hair, particularly near the root of the hair, is lowered, making it difficult to make a hairstyle with a voluminous feel.

  By the way, the hair styling agent disclosed in Patent Document 2 has a problem that when the synthetic polymer is applied to the hair, the flexibility of the hair is lowered and the touch of the hair is inferior. Therefore, even if a synthetic polymer is used, it is difficult to make a hairstyle with a volume feeling while imparting a moist feeling to the hair.

  As a result of intensive studies by the inventors of the present invention, for example, in a hair treatment composition in which an oligosaccharide is used, the above problem is solved by adding L-theanine to the hair treatment composition. It was made by finding. The objective of this invention is providing the composition for hair treatment which can improve the elasticity of hair root vicinity, providing a moist feeling with respect to hair.

  In order to achieve the above object, the hair treatment composition of the invention described in claim 1 contains (A) L-theanine, and (B) at least one selected from oligosaccharides and derivatives thereof. And

  The invention according to claim 2 is the hair treatment composition according to claim 1, wherein at least one selected from the (B) oligosaccharide and derivatives thereof is raffinose, trehalose, sucrose, maltose, cellobiose, palatinose, It is at least one selected from xylooligosaccharide, fructooligosaccharide, galactooligosaccharide, maltooligosaccharide, inulooligosaccharide, lactosucrose, and glucosyl trehalose.

  The invention according to claim 3 is the hair treatment composition according to claim 1 or claim 2, wherein (A) L-theanine and (B) at least one selected from oligosaccharides and derivatives thereof are combined. The ratio is characterized by a mass ratio of 1: 0.1 to 10,000.

  ADVANTAGE OF THE INVENTION According to this invention, the elasticity of hair base vicinity can be improved, providing a moist feeling with respect to hair.

  Hereinafter, embodiments in which the present invention is embodied in a composition for treating hair will be described in detail. The hair treatment composition according to this embodiment contains (A) L-theanine, and (B) at least one selected from oligosaccharides and derivatives thereof.

  (A) L-theanine exhibits the effect of improving elasticity near the root of the hair while imparting a moisturizing feeling to the hair when used in combination with at least one selected from (B) oligosaccharides and derivatives thereof. To do. (A) L-theanine alone has a hair repair effect. (A) L-theanine is a derivative of L-glutamic acid and is a kind of amino acid. L-theanine is a component that is abundant in tea leaves, especially gyokuro, and is known as an umami component of green tea. L-theanine can be obtained by extraction from tea leaves by a conventional method or by chemical synthesis. Any natural or synthetic L-theanine can be used in the hair treatment composition.

  The content of (A) L-theanine in the hair treatment composition is preferably 0.001 to 5 mass%, more preferably 0.01 to 3 mass%. (A) If the content of L-theanine is less than 0.001% by mass, the effect of improving the elasticity to the hair cannot be exhibited sufficiently. (A) Even if the content of L-theanine exceeds 5% by mass, no further effect of improving the elasticity to the hair can be obtained.

  (B) At least 1 type chosen from an oligosaccharide and its derivative (s) is mix | blended in order to provide moisture retention with respect to hair. (B) At least one selected from oligosaccharides and derivatives thereof binds to the hair surface made of keratin protein and imparts moisture to the hair. The oligosaccharide refers to a saccharide having a polymerization degree of disaccharide to decasaccharide. Although the monosaccharide which comprises an oligosaccharide is not specifically limited, For example, a triose, a tetrose, a pentose, a hexose, and a heptose is mentioned. Examples of oligosaccharides include oligosaccharides extracted from natural materials, chemically synthesized oligosaccharides, oligosaccharides obtained by addition reaction or transfer reaction using enzymes, and oligosaccharides obtained by hydrolysis from polysaccharides. Either of these may be used. As the oligosaccharide, any of a linear oligosaccharide, a branched oligosaccharide, and a cyclic oligosaccharide may be used. Examples of the disaccharide include trehalose, sucrose, maltose, cellobiose, palatinose, and lactose. Examples of the trisaccharide include raffinose, gentianose, melezitose, fucosyl lactose, sialyl lactose, maltotriose, cellotriose, and glucosyl trehalose. Examples of the tetrasaccharide include stachyose, lacto-N-tetraose, and maltotetraose.

  Examples of oligosaccharides obtained mainly by enzymatic reaction include xylooligosaccharides, fructooligosaccharides, galactooligosaccharides, maltooligosaccharides, isomaltooligosaccharides, inulooligosaccharides, lactosucrose, dairy oligosaccharides and agarooligosaccharides. Xylooligosaccharides can be obtained by hydrolyzing xylan using xylan as a raw material and using a hydrolase such as xylanase. Fructooligosaccharide is a mixture of sugars in which 1 to 3 molecules of fructose are bonded to sucrose. Fructooligosaccharides can be obtained by transferring fructose (fructose) to sucrose using sucrose as a raw material and using a glycosyltransferase such as β-fructofuranosidase and glucose isomerase. The galactooligosaccharide is mainly composed of a trisaccharide (galactosyl lactose) in which galactose is bound to lactose. Galactooligosaccharides are synthesized from lactose and galactose as raw materials using a glycosyltransferase such as β-galactosidase. Maltooligosaccharides and isomaltoligosaccharides can be obtained by reacting starch with a hydrolase such as α-amylase, β-amylase, and α-glycosidase. The maltooligosaccharide and the isomaltoligosaccharide are a mixture mainly composed of glucose disaccharide to hexasaccharide. Inuro-oligosaccharides can be obtained by incubating trisaccharide or tetrasaccharide units from the fructose end of inulin using inulin as a raw material and using a hydrolase, for example, oligosaccharide-producing exoinulinase. Lactosucrose and dairy oligosaccharide can be obtained by reacting sucrose and lactose as raw materials using a glycosyltransferase such as fructosyltransferase. The agarooligosaccharide is obtained by reacting a hydrolase such as agarase with agarose as a raw material. Examples of oligosaccharides extracted from natural products include soybean oligosaccharides.

  As the oligosaccharide used in the present embodiment, a derivative of an oligosaccharide obtained by imparting another characteristic to the oligosaccharide may be used as long as the effects of the present invention are not impaired. Examples of oligosaccharide derivatives include reduced oligosaccharides, oxidized oligosaccharides, cationized oligosaccharides, glycosides, complexes of oligosaccharides and lipids, and complexes of oligosaccharides and proteins. Examples of reduced oligosaccharides include maltitol, lactitol, and reduced palatinose as sugar alcohols. Specific examples of these oligosaccharides and derivatives thereof may be used alone or in combination of two or more.

  Among these oligosaccharides, at least one selected from raffinose, trehalose, sucrose, maltose, cellobiose, palatinose, xylooligosaccharide, fructooligosaccharide, galactooligosaccharide, maltooligosaccharide, inulooligosaccharide, lactosucrose, and glucosyltrehalose is preferable. These components, when used in combination with (A) L-theanine, are superior to other oligosaccharides in improving the elasticity in the vicinity of the base of the hair while imparting a moist feeling to the hair.

  The content of at least one selected from (B) oligosaccharides and derivatives thereof in the hair treatment composition is preferably 0.005 to 10% by mass, more preferably 0.01 to 5% by mass. (B) When the content of at least one selected from oligosaccharides and derivatives thereof is less than 0.005% by mass, the effect of improving the moisture retention cannot be sufficiently exerted on the hair. (B) Even if the content of at least one selected from oligosaccharides and derivatives thereof exceeds 10% by mass, no further improvement in moisture retention with respect to the hair is obtained, and the hair feels sticky. There is a fear.

  (A) In order to further demonstrate the effect of imparting a moist feeling to the hair and the effect of improving the elasticity in the vicinity of the base of the hair by the combined use of L-theanine and (B) at least one selected from oligosaccharides and derivatives thereof The blending ratio of (A) L-theanine to (B) at least one selected from oligosaccharides and derivatives thereof is preferably adjusted as follows. (A) L-theanine: (B) At least one selected from oligosaccharides and derivatives thereof is preferably 1: 0.1 to 10,000, more preferably 1: 0.5 to 1,000, as a mass ratio. .

  The hair treatment composition may be, for example, water, a water-soluble polymer compound, an oil component, a polyhydric alcohol, a surfactant, a saccharide, a preservative, a chelating agent, a stabilizer, a pH adjuster, a plant extract. , Herbal extracts, vitamins, fragrances, and ultraviolet absorbers may be included.

  Water is used as a solvent or dispersion medium for each component. An appropriate amount of water is mixed with the surfactant to emulsify the hair treatment composition. The water content in the hair treatment composition is preferably 50 to 95% by mass, more preferably 70 to 90% by mass. If the water content is less than 50% by mass, emulsification of the hair treatment composition may be insufficient. If the water content exceeds 95% by mass, it becomes difficult to ensure the uniformity and stability of the hair treatment composition.

  Examples of the water-soluble polymer compound include gum arabic, gum karaya, gum tragacanth, sodium alginate, xanthan gum, cellulose derivatives, cross-linked polyacrylic acid, and polydimethylmethylene piperidinium chloride. Examples of the crosslinked polyacrylic acid include carbomers.

  The oily component imparts a moist feeling to the hair. Therefore, the hair treatment composition preferably contains an oily component. Examples of the oil component include fats and oils, waxes, higher alcohols, hydrocarbons, higher fatty acids, alkyl glyceryl ethers, esters, and silicones.

  Examples of oils and fats include olive oil, camellia oil, shea fat, almond oil, safflower oil, sunflower oil, soybean oil, cottonseed oil, sesame oil, corn oil, rapeseed oil, rice bran oil, rice germ oil, grape seed oil, avocado oil , Macadamia nut oil, castor oil, coconut oil, and evening primrose oil. Examples of the waxes include beeswax, candelilla wax, carnauba wax, jojoba oil, and lanolin.

  Examples of higher alcohols include lauryl alcohol, myristyl alcohol, cetanol, stearyl alcohol, cetostearyl alcohol, aralkyl alcohol, behenyl alcohol, 2-hexyldecanol, isostearyl alcohol, 2-octyldodecanol, decyltetradecanol, oleyl alcohol, and Lanolin alcohol is mentioned.

  Examples of the hydrocarbon include paraffin, olefin oligomer, polyisobutene, hydrogenated polyisobutene, mineral oil, squalane, polybutene, polyethylene, microcrystalline wax, and petrolatum. Examples of the higher fatty acid include lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, isostearic acid, 12-hydroxystearic acid, oleic acid, and lanolin fatty acid. Examples of the alkyl glyceryl ether include batyl alcohol, chimyl alcohol, ceralkyl alcohol, and isostearyl glyceryl ether.

  Examples of the esters include diisopropyl adipate, isopropyl myristate, cetyl octanoate, isononyl isononanoate, octyldodecyl myristate, isopropyl stearate, stearyl stearate, myristyl myristate, isotridecyl myristate, 2-ethylhexyl palmitate Octyldodecyl ricinoleate, fatty acid (C10-30) (cholesteryl / lanosteryl), cetyl lactate, lanolin acetate, ethylene glycol di-2-ethylhexanoate, pentaerythritol fatty acid ester, dipentaerythritol fatty acid ester, cetyl caprate, tricapryl Examples include glyceryl acid, diisostearyl malate, and dioctyl succinate.

  Examples of silicones include dimethylpolysiloxane (dimethicone), methylphenylpolysiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, terminal hydroxyl group-modified dimethylpolysiloxane, polyether-modified silicone, and an average polymerization degree of 650 to 10,000. Examples include highly polymerized silicone, amino-modified silicone, betaine-modified silicone, alkyl-modified silicone, alkoxy-modified silicone, mercapto-modified silicone, carboxy-modified silicone, and fluorine-modified silicone. Examples of the polyether-modified silicone include PEG-12 dimethicone. Specific examples of these oil components may be used alone or in combination of two or more.

  Examples of the polyhydric alcohol include glycerin, diglycerin, polyglycerin, ethylene glycol, isopentyldiol, propylene glycol (PG), dipropylene glycol (DPG), and 1,3-butylene glycol (BG).

  The surfactant is suitably blended to maintain the stability of the hair treatment composition as an emulsifier of the composition or a solubilizer of each component in the composition. Surfactants include ionic surfactants and nonionic surfactants. Examples of the ionic surfactant include a cationic surfactant, an anionic surfactant, and an amphoteric surfactant. Examples of the anionic surfactant include alkyl ether sulfate, alkyl sulfate, alkenyl ether sulfate, alkenyl sulfate, olefin sulfonate, alkane sulfonate, saturated or unsaturated fatty acid salt, alkyl or alkenyl ether carboxylate , Α-sulfone fatty acid salts, N-acylamino acid type surfactants, phosphate mono- or diester type surfactants, and sulfosuccinate esters. Examples of the alkyl ether sulfate include sodium laureth sulfate. Examples of the N-acylamino acid type surfactant include sodium N-lauroyl-L-glutamate. Examples of the counter ion of the anionic group of these surfactants include sodium ion, potassium ion, and triethanolamine.

  Examples of the cationic surfactant include alkyltrimethylammonium salt, alkenyltrimethylammonium salt, dialkyldimethylammonium salt, dialkenyldimethylammonium salt, lanolin fatty acid aminopropylethyldimethylammonium, and alkyloylamidopropyldimethylamine. Examples of the alkyl trimethyl ammonium salt include stearyl trimethyl ammonium chloride. Examples of the dialkyldimethylammonium salt include distearyldimethylammonium chloride. Examples of the counter ion of the cationic group of these surfactants include chloride ion, bromide ion, iodide ion, alkyl sulfate ion, and saccharin.

  Examples of amphoteric surfactants include cocobetaine, lauramidopropyl betaine, cocamidopropyl betaine, sodium lauroamphoacetate, and sodium cocoamphoacetate.

  Examples of the nonionic surfactant include polyoxyalkylene alkyl ether, polyoxyalkylene alkenyl ether, polyoxyethylene sorbitan fatty acid ester, sucrose fatty acid ester, sorbitan fatty acid ester, alkyl saccharide surfactant, glycerin fatty acid ester, Examples include polyoxyethylene hydrogenated castor oil, fatty acid alkanolamide, and alkylamine oxide. Examples of the polyoxyalkylene alkyl ether include laureth, ceteth, steareth, and palace. Specific examples of these surfactants may be used alone or in combination of two or more.

  Examples of the saccharide include sorbitol. Examples of the preservative include parabens. Examples of the chelating agent include ethylenediaminetetraacetic acid disodium (EDTA-2Na). Examples of the stabilizer include phenacetin, 8-hydroxyquinoline, acetanilide, sodium pyrophosphate, barbituric acid, uric acid, and tannic acid. Examples of the pH adjuster include lactic acid, glycolic acid, tartaric acid, malic acid, pyrrolidone carboxylic acid (PCA), succinic acid, citric acid, glutamic acid, 2-amino-2-methyl-1-propanol (AMP), and triethanolamine. (TEA), and arginine.

  The hair treatment composition can be made into a liquid, mist, gel, foam, cream, or other dosage form. The hair treatment composition can be used as a hair care agent for imparting a moisturizing effect, for example, a shampoo, a rinse, and a hair treatment agent. This hair treatment composition may be used after being applied to the hair and washed away 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. This hair treatment composition may be used as a hair styling agent. This hair treatment composition may be used after being applied to the hair and washed away 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. The hair treatment composition may be used as a hair dyeing agent, for example, an oxidative hair dye and an acid hair dye, for example, by further blending a dye. This hair treatment composition may be applied as a bleaching agent, for example, by blending an oxidizing agent. This hair treatment composition may be used, for example, as a permanent wave agent, a hair straightener and a decoloring agent by blending a reducing agent.

According to the embodiment described in detail above, the following effects are exhibited.
(1) In this embodiment, (A) L-theanine was blended in a hair treatment composition containing at least one selected from (B) oligosaccharides and derivatives thereof. Therefore, it is possible to improve elasticity near the base of the hair while giving a moist feeling to the hair.

  (2) In this embodiment, even if it is a case where at least 1 type chosen from (B) oligosaccharide and its derivative (s) is mix | blended with the composition for hair treatment, the hairstyle with a volume feeling can be made. In particular, it is possible to make a voluminous hairstyle even for fine hair, which is difficult to make a voluminous hairstyle due to its high moisturizing effect.

  (3) In this embodiment, (B) L-theanine is used in combination with at least one selected from (B) oligosaccharides having a hair moisturizing effect and derivatives thereof. Therefore, it is possible to further improve the hair moisturizing effect exhibited by at least one selected from (B) oligosaccharides and derivatives thereof. Moreover, the sustainability of the moisturizing effect is also good.

  (4) In the present embodiment, among the oligosaccharides, raffinose, trehalose, sucrose, maltose, cellobiose, palatinose, xylo-oligosaccharide, fructooligosaccharide, galactooligosaccharide, malto-oligosaccharide, inulo-oligosaccharide, lactosucrose, and glucosyl trehalose At least one is preferably used. Therefore, in combination with (A) L-theanine, it is possible to obtain a higher effect than the other oligosaccharides with respect to the effect of improving the elasticity near the root of the hair while imparting a moist feeling to the hair. it can.

  (5) In this embodiment, (A) L-theanine is mix | blended in the composition for hair treatment. Therefore, the composition exhibits an effect of repairing damage to hair damaged by, for example, hair dyeing treatment, decoloring treatment, permanent treatment and ultraviolet irradiation. Moreover, the persistence of the repair effect is also favorable.

  (6) In this embodiment, when (A) L-theanine and (B) at least one selected from oligosaccharides and derivatives thereof are used in combination, the hair repair effect exhibited by (A) L-theanine is further increased. Can be improved.

The above embodiment can be modified as follows.
-In the said embodiment, you may divide | segment each component mix | blended with the composition for hair treatment, and you may comprise as a multiple dosage form.

Next, the embodiment will be described more specifically with reference to examples and comparative examples.
(Hair treatment agent)
In each example shown in Tables 1 and 2, a hair treatment composition as a hair treatment agent was prepared by mixing each component. Each composition was applied to a human black hair bundle or a straight bob-style wig (wig: see FIG. 1) and blended into the hair. The hair was then allowed to stand for 3 minutes, rinsed with warm water and dried with a dryer. In Table 1, the unit of the numerical value indicating the blending amount of each component is mass%.

(Hair volume (quantity))
The volume feeling of the hair was judged by visually observing the wig treated with the hair treatment composition of each example. Regarding the evaluation of hair volume, if there is sufficient volume feeling due to sufficient elasticity in the vicinity of the hair root, it is considered “excellent”, and there is elasticity in the vicinity of the hair root and there is volume feeling. `` Good '', the elasticity near the hair root is slightly lost and the volume feeling is slightly inferior, `` Slightly bad '', and the elasticity near the hair root is lost and there is no volume feeling `` "Bad".

  In addition, in FIG. 1, evaluation of the volume feeling of hair is shown for reference. In the hair of FIG. 1 (straight bob style wig), it was evaluated that the hair on the left side from the top of the head had sufficient elasticity (“excellent”) due to sufficient elasticity near the root of the hair. The hair on the right side from the top of the head was evaluated as having no elasticity (“bad”) due to loss of elasticity near the root of the hair.

(Tensile strength of hair)
For human black hair bundles before and after being treated with the hair treatment composition of each example, the breaking stress value was measured using a tensile tester (Tensilon (trade name) UTM-II, manufactured by Toyo Baldwin Co., Ltd.), and the increase in the value was measured. The rate was the strength increase rate (%).

  And it evaluated on the following reference | standard about the intensity | strength of hair from the calculated | required strength increase rate. A strength increase rate of 9% or more is considered “excellent”, a strength increase rate of 7% or more and less than 9% is “good”, and a strength increase rate of 5% or more and less than 7% is “slightly bad”. Less than 5% was regarded as “bad”.

(Moist hair feeling)
Regarding the human black hair bundle treated with the hair treatment composition of each example, 4 points when the moisture feeling is very good when touched by 5 panelists, 3 points when it is good, 2 points when it is slightly bad , And a bad case was scored in 4 stages. Then, as an evaluation of moist feeling, an average score is calculated for the scoring results of five panelists, and when the average score is 3.6 points or more, it is considered “excellent” and 2.6 points or more and less than 3.6 points The case was “good”, the case of 1.6 points or more and less than 2.6 points was “slightly bad”, and the case of less than 1.6 points was “bad”.

(Moisture retention of hair)
The human black hair bundle treated with the hair treatment composition of each example was first left in an atmosphere of 25 ° C. and 50% RH for 24 hours, and the initial hair mass (X) was measured. Next, the same hair bundle was further allowed to stand in an atmosphere of 25 ° C. and 10% RH for 24 hours, and the secondary hair mass (Y) was measured. Next, the same hair bundle with diphosphorus pentoxide was left in a desiccator under reduced pressure for one week, and the dry hair mass (Z) when completely dried was measured. The dry hair mass (Z) was subtracted from the initial hair mass (X) and the secondary hair mass (Y), respectively, to obtain hair moisture in each drying step. Hair treated with only water (control hair) was also subjected to the same drying treatment, and the moisture content of the control hair in each drying step was obtained. The amount of water in each drying step in each example, where the amount of water in each drying step of the control hair is 100%, the ratio ([hair moisture in each example] x 100 / [control hair moisture]] Expressed as (%). For each example, the average of the ratio (%) to the control hair in each step was calculated. In the evaluation of moisture retention, the case of 110% or more is “excellent”, the case of 105% or more and less than 110% is “good”, the case of 101% or more and less than 105% is “slightly bad”, and less than 101% The case of was considered "bad".

As shown in Table 1, in Examples 1 to 14 containing (A) L-theanine and (B) oligosaccharide, all evaluations of hair volume feeling, tensile strength, moisture feeling, and moisture retention were performed. It was confirmed to be “excellent” or “good”. In particular, in Examples 1 to 13 other than Example 14 in which (B) the oligosaccharide is lactose, all evaluations of hair volume feeling, tensile strength, moisture feeling, and moisture retention are “excellent”. Was confirmed.

  On the other hand, (A) Comparative Example 1 containing no L-theanine resulted in a decrease in volume feeling as shown in Table 2. In Comparative Example 1, compared to Example 1, moisture feeling and moisture retention are reduced. This is considered to be due to the fact that the hair moisturizing effect of (B) oligosaccharide is improved by using (A) L-theanine and (B) oligosaccharide in combination in Example 1.

  (B) In Comparative Example 2 in which oligosaccharide and glutamine as an amino acid are used in combination, it was confirmed that the volume of hair was not improved. In addition, in Comparative Example 2 in which (B) the oligosaccharide and glutamine are used in combination, it was confirmed that the moisture feeling and water retention were lowered as compared with Comparative Example 1 in which no amino acids were blended.

  (A) In Comparative Example 4 in which L-theanine and a monosaccharide were used in combination, it was confirmed that the volume feeling was “bad”. (A) In Comparative Examples 5 and 6 in which L-theanine and a monosaccharide sugar alcohol were used in combination, it was confirmed that the volume feeling was “bad”. (A) In Comparative Example 7 in which L-theanine and polysaccharide were used in combination, it was confirmed that the volume feeling was “bad”. In Comparative Example 3 in which (B) no oligosaccharide is used, the tensile strength is reduced as compared with each Example. Therefore, by using (A) L-theanine and (B) an oligosaccharide in combination, ( A) It turns out that the repair effect of the hair by L-theanine improves further.

  In addition, the notation of (A) and (B) in a table | surface shows the compound corresponding to each component as described in this-application claim (hereinafter the same). On the other hand, the notations a and b in the table indicate comparative compounds of the respective components described in the claims of the present application.

(shampoo)
In each example shown in Table 3, a composition for treating hair as a shampoo was prepared by mixing each component. Each composition was applied to a human black hair bundle or a straight bob style wig (wig: see FIG. 1), washed, and rinsed with warm water. Next, the hair was dried with a drier, and the dried hair was evaluated for hair volume, tensile strength, moisture and moisture retention. Each evaluation followed the method described in the hair treatment agent column. In Table 3, the unit of the numerical value indicating the blending amount of each component is mass%.

As shown in Table 3, in Examples 15 to 18 containing (A) L-theanine and (B) oligosaccharide, all evaluations of hair volume, tensile strength, moisture, and moisture retention were performed. It was confirmed to be “excellent”.

(Out bath treatment agent)
In each example shown in Table 4, a composition for treating hair as an out bath treatment agent was prepared by mixing each component. An appropriate amount of each composition was applied to a bundle of human black hair or a straight bob-style wig after washing with water (wig: see FIG. 1). Next, the hair was dried using a dryer. About the hair after drying, the volume feeling of the hair, the tensile strength, the moisture feeling, and the moisture retention were evaluated. Each evaluation followed the method described in the hair treatment agent column. In Table 4, the unit of the numerical value indicating the blending amount of each component is mass%.

As shown in Table 4, in Examples 19 to 23 containing (A) L-theanine and (B) oligosaccharide, all evaluations of hair volume, tensile strength, moisture, and moisture retention were performed. It was confirmed to be “excellent”.

(Oxidative hair dye)
The composition for treating hair as an oxidative hair dye comprises a first oxidative hair dye containing an oxidative dye and an alkaline agent (hereinafter referred to as “first agent”) and an oxidative hair dye containing an oxidant. It is composed of two agents (hereinafter referred to as “second agent”). The first agent and the second agent of each example shown in Table 5 were prepared, and the first agent and the second agent were mixed at a mass ratio of 1: 2, and the mixture was mixed with a human black hair bundle or a straight bob style wig. (Wig: see FIG. 1) and then left for 20 minutes. Thereafter, each hair was dyed by washing the mixture adhering to the hair with water and drying it. Each hair thus treated with an oxidative hair dye was used to evaluate the hair's volume, tensile strength, moisture and moisture retention. Each evaluation followed the method described in the hair treatment agent column. In Table 5, the unit of the numerical value indicating the blending amount of each component is mass%.

As shown in Table 5, in Examples 24 to 27 containing (A) L-theanine and (B) oligosaccharide, all evaluations of hair volume, tensile strength, moisture, and moisture retention were performed. It was confirmed to be “excellent”.

Next, the technical idea that can be grasped from the embodiment will be described below.
(A) The hair treatment composition used as a hair care agent.
(B) The said composition for hair treatment whose compounding quantity of the said L-theanine is 0.001-5 mass%.

The reference figure which shows evaluation of the volume feeling of hair. The hair on the left side from the top of the head shows a case where the volume feeling is sufficient (“excellent”) due to sufficient elasticity near the root of the hair. The hair on the right side from the top of the head shows the case where the elasticity near the base of the hair is lost and there is no volume (“bad”).

Claims (3)

  A hair treatment composition comprising (A) L-theanine, and (B) at least one selected from oligosaccharides and derivatives thereof.   At least one selected from the (B) oligosaccharide and derivatives thereof is selected from raffinose, trehalose, sucrose, maltose, cellobiose, palatinose, xylo-oligosaccharide, fructooligosaccharide, galactooligosaccharide, maltooligosaccharide, inulooligosaccharide, lactosucrose, and glucosyltrehalose. The hair treatment composition according to claim 1, wherein the composition is at least one selected.   The mixing ratio of (A) L-theanine and (B) at least one selected from oligosaccharides and derivatives thereof is 1: 0.1 to 10,000 as a mass ratio. 2. A composition for treating hair according to 2.