JP4585265B2 - Hair cosmetic composition - Google Patents

Description

  The present invention relates to a hair cosmetic composition containing a hair damage repair ingredient.

In recent years, with the diversification of hairstyles, 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 easily damaged. It is in. A hair cosmetic composition that exhibits an effect of repairing damaged hair by being applied to such hair is known (see Patent Documents 1 and 2). The hair cosmetic compositions described in Patent Documents 1 and 2 contain a silicone derivative as a hair damage repair component.
JP-A-8-188519 JP-A-8-208439

  By the way, in the hair cosmetic composition of the said patent document 1 and 2, the repair effect of the damaged hair is acquired. However, it was not satisfactory about the sustainability of the repair effect.

  The present invention has been made in view of such conventional circumstances, and its purpose is to provide a hair cosmetic composition that exhibits a repairing effect on damaged hair and also exhibits sufficient sustainability of the effect. To provide things.

In order to achieve the above object, the hair cosmetic composition of the invention according to claim 1 includes the following components (A) and (B).
(A) L-theanine (except for inclusion as a tea extract) .

(B) At least one selected from amino-modified silicone, ammonium-modified silicone and terminal hydroxyl group-modified dimethylpolysiloxane.
The hair cosmetic composition of the invention described in claim 2 is characterized in that, in the invention described in claim 1, a silicone derivative other than the component (B) is further contained as the component (C).

  ADVANTAGE OF THE INVENTION According to this invention, while exhibiting a repair effect with respect to the damaged hair, the hair cosmetic composition which fully exhibits the sustainability of the effect can be provided.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments embodying the present invention will be described in detail.
The hair cosmetic composition of this embodiment contains (A) component and (B) component. The component (A) is L-theanine, and the component (B) is at least one selected from amino-modified silicone, ammonium-modified silicone, and terminal hydroxyl group-modified dimethylpolysiloxane. These (A) component and (B) component are contained as a hair damage repair component.

  (A) L-theanine is a derivative of L-glutamic acid and is a kind of amino acid. This L-theanine is a component that is abundantly contained in tea leaves, particularly 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 and synthetic L-theanine can be used in the hair cosmetic composition.

  The content of the component (A) in the hair cosmetic composition is preferably 0.001 to 5% by mass, more preferably 0.01 to 3% by mass. If the content is less than 0.001% by mass, damaged hair may not be efficiently repaired. On the other hand, even if it exceeds 5% by mass, there is a possibility that a further repair effect cannot be obtained.

  (B) At least one selected from amino-modified silicone, ammonium-modified silicone, and terminal hydroxyl group-modified dimethylpolysiloxane is blended to further exhibit the hair repair effect of (A) L-theanine.

  Amino-modified silicone and ammonium-modified silicone are represented by the following general formula (1).

（一般式（１）中、Ｒ¹はメチル基又はヒドロキシル基を表し、Ｒ²はメチル基、ヒドロキシル基又はＲ³を表す。Ｒ³はＲ⁴Ｚで表されるアミノ基又はアンモニウム基を有する置換基を表し、ａ及びｂはそれぞれ分子量に依存する整数を表し、ａ＋ｂは５０〜２０，０００である。また、Ｒ⁴は炭素数３〜６の２価の炭化水素基を表す。Ｚは、−ＮＲ⁵ ₂、−Ｎ⁺Ｒ⁵ ₃Ａ^-、−ＮＲ⁵（ＣＨ₂）_cＮＲ⁵ ₂、−ＮＲ⁵（ＣＨ₂）_cＮ⁺Ｒ⁵ ₃Ａ^-、及び−ＮＲ⁵（ＣＨ₂）_cＮＲ⁵Ｃ＝Ｏ（Ｒ⁶）からなる群より選ばれる１価の基を表す。ここで、Ｒ⁵は水素原子又は炭素数１〜４の炭化水素基、Ｒ⁶は炭素数１〜４の炭化水素基、Ａはハロゲン原子、及びｃは２〜６の整数を表す。）
アミノ変性シリコーンは、一般式（１）中のＲ³がアミノ基を有する置換基Ｒ⁴Ｚであり、同Ｚは−ＮＲ⁵ ₂、−ＮＲ⁵（ＣＨ₂）_cＮＲ⁵ ₂、及び−ＮＲ⁵（ＣＨ₂）_cＮＲ⁵Ｃ＝Ｏ（Ｒ⁶）からなる群より選ばれる１価の基であるものを示す。また、アミノ変性シリコーンには、一般式（１）によって表されるもの以外に、アミノ変性ポリエーテル変性シリコーンも含まれる。アミノ変性ポリエーテル変性シリコーンは、International Nomenclature Cosmetic Ingredient名（以下、ＩＮＣＩ名という）を、ジメチコン・ビスアミノヒドロキシプロピルコポリオール、及びビスアミノＰＥＧ／ＰＰＧ−４１／３アミノエチルＰＧ−プロピルジメチコンとしてInternational Cosmetic Ingredient Dictionary and Handbook（米国化粧品工業会発行、以下、ＩＣＩＤという）に記載されているものを示す。アミノ変性ポリエーテル変性シリコーンの市販品としては、日本ユニカー社製のシルソフト（商品名）Ａ−８４３が挙げられる。

(In General Formula (1), R ¹ represents a methyl group or a hydroxyl group, R ² represents a methyl group, a hydroxyl group, or R ^3. R ³ has an amino group or an ammonium group represented by R ⁴ Z. A and b are each an integer depending on the molecular weight, a + b is 50 to 20,000, R ⁴ is a divalent hydrocarbon group having 3 to 6 carbon atoms, Z is _{^{, -NR 5 2, -N + R}} 5 3 A -, -NR 5 (CH 2) c NR 5 2, -NR 5 (CH 2) c N + R 5 3 A -, and -NR ⁵ (CH ₂ ) _C NR ⁵ represents a monovalent group selected from the group consisting of C═O (R ⁶ ), wherein R ⁵ is a hydrogen atom or a hydrocarbon group having 1 to 4 carbon atoms, and R ⁶ is a group having 1 to 1 carbon atoms. 4 represents a hydrocarbon group, A represents a halogen atom, and c represents an integer of 2 to 6.)
In the amino-modified silicone, R ³ in the general formula (1) is a substituent R ⁴ Z having an amino group, and Z is —NR ⁵ ₂ , —NR ⁵ (CH ₂ ) _c NR ⁵ ₂ , and —NR ⁵ (CH ₂ ) _c NR ⁵ represents a monovalent group selected from the group consisting of C═O (R ⁶ ). The amino-modified silicone includes amino-modified polyether-modified silicones other than those represented by the general formula (1). The amino-modified polyether-modified silicone has the International Nomenclature Cosmetic Ingredient name (hereinafter referred to as INCI name) as International Cosmetic Ingredient as dimethicone / bisaminohydroxypropyl copolyol and bisaminoPEG / PPG-41 / 3 aminoethyl PG-propyl dimethicone. This is what is described in the Dictionary and Handbook (issued by the American Cosmetic Industry Association, hereinafter referred to as ICID). As a commercial product of amino-modified polyether-modified silicone, Sylsoft (trade name) A-843 manufactured by Nippon Unicar Co., Ltd. may be mentioned.

In the ammonium-modified silicone, R ³ in the general formula (1) is a substituent R ⁴ Z having an ammonium group, and Z is —N ⁺ R ⁵ ₃ A ^— or —NR ⁵ (CH ₂ ) _c N ⁺ R. ⁵ ₃ A ^-represents a monovalent group.

  The terminal hydroxyl group-modified dimethylpolysiloxane is a dimethylpolysiloxane having a hydroxyl group bonded to the terminal and having an INCI name of Dimethiconol described in ICID.

  These components (B) may be blended singly or in combination of two or more. Among these components (B), since the effect of repairing hair is further exhibited when used in combination with component (A), amino-modified silicone or terminal hydroxyl group-modified dimethylpolysiloxane is preferred. Among amino-modified silicones, Preferably, aminopropylmethylsiloxane / dimethylsiloxane copolymer (aminopropyl dimethicone), aminoethylaminopropylmethylsiloxane / dimethylsiloxane copolymer (amodimethicone), aminoethylaminopropylmethylsiloxane / dimethylsiloxane copolymer (trimethylsilylammo) Dimethicone), dimethicone bisaminohydroxypropyl copolyol, bisaminoPEG / PPG-41 / 3 aminoethyl PG-propyl dimethicone, and aminoethylaminopropylmethyl silo It is one selected from Sun dimethylsiloxane-oxyalkylene block copolymer.

  The content of the component (B) in the hair cosmetic composition is preferably 0.01 to 5% by mass, more preferably 0.05 to 4% by mass, and still more preferably 0.1 to 3% by mass. If the content is less than 0.01% by mass, damaged hair may not be efficiently repaired. On the other hand, if it exceeds 5% by mass, the hair may feel heavy.

  It is preferable that the hair cosmetic composition further contains a silicone derivative other than the component (B) as the component (C). This (C) component has the effect | action which improves the fingering property with respect to the hair restored | repaired by the said (A) component and (B) component. Specific examples of the component (C) include dimethyl silicone, methyl phenyl silicone, cyclic dimethyl silicone, cyclic silicone, methyl hydrogen silicone, alcohol modified silicone, aliphatic alcohol modified silicone, alkyl modified silicone, polyether modified silicone, epoxy modified. Examples include silicone and fluorine-modified silicone. Specifically, octamethylcyclotetrasiloxane, octamethyltrisiloxane, methylpolysiloxane (dimethicone), dimethylsiloxane / methylstearoxysiloxane copolymer, dimethylsiloxane / methylcetyloxysiloxane copolymer, dimethylsiloxane / methyl ( Polyoxyethylene) siloxane copolymer, stearoxytrimethylsilane, stearoxymethylpolysiloxane, decamethylcyclopentasiloxane, decamethyltetrasiloxane, tetradecamethylcycloheptasiloxane, tetradecamethylhexasiloxane, tetrahydrotetramethylcyclotetrasiloxane , Dodecamethylcyclohexasiloxane, tris (tributoxysiloxy) methylsilane, trimethylsiloxysilicic acid, bisphenyldode Methylhexasiloxane, hexadecylmethylcyclopolysiloxane, hexamethylcyclotrisiloxane, hexamethyldisiloxane, dimethicone copolyol [poly (oxyethylene / oxypropylene) methylpolysiloxane copolymer, polyoxyethylene / methylpolysiloxane Polymer, polyoxypropylene / methylpolysiloxane copolymer, etc.], polymethylmethacrylate / dimethylpolysiloxane graft copolymer, methylcyclopolysiloxane, methylhydrogenpolysiloxane, methylphenylpolysiloxane, methylpolysiloxane / cetyl Methylpolysiloxane / poly (oxyethylene / oxypropylene) methylpolysiloxane copolymer, poly (oxyethylene / oxypropylene) / butylene / methylpoly Rokisan copolymers.

  These components (C) may be blended singly or in combination of two or more. Among these components (C), since the hair repair effect is further exhibited when used in combination with component (A), methylpolysiloxane, methylphenylpolysiloxane, poly (oxyethylene / oxypropylene) methyl are preferred. It is a kind selected from a polysiloxane copolymer, a polyoxyethylene / methyl polysiloxane copolymer, and a polyoxypropylene / methyl polysiloxane copolymer.

  Content of (C) component in hair cosmetics composition becomes like this. Preferably it is 0.001-10 mass%, More preferably, it is 0.01-8 mass%, More preferably, it is 0.1-7 mass%. If the content is less than 0.001% by mass, it may be difficult to efficiently enhance the hair repair effect. On the other hand, if it exceeds 10% by mass, it is difficult to obtain a further improvement effect, and the hair may become heavy.

In the hair cosmetic composition, an oily component, a hydrocarbon, a surfactant, a pH adjuster and the like can be blended as other components.
The oil component is preferably blended from the viewpoint of imparting moisture to the hair. Examples of the oil component include polyhydric alcohols, fats and oils, waxes, higher alcohols, higher fatty acids, alkyl glyceryl ethers, esters 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.

  As fats, olive oil, camellia oil, shea fat, macadamia nut oil, 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, rice bran oil, rice germ oil, wheat germ oil, pearl barley oil, grape seed oil, avocado oil, carrot oil, macadamia nut oil, castor oil, linseed 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, hexyldecyl 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. 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 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, behenyl trimethyl ammonium chloride, distearyl dimethyl ammonium chloride, cetyl trimethyl ammonium bromide, stearyl trimethyl ammonium bromide, ethyl lanolin sulfate fatty acid Examples 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 tetradecene sulfonate, POE lauryl ether phosphoric acid and salts thereof, N-lauroyl glutamates, N-lauroylmethyl-β-alanine salts, and the like.

  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, lactic acid, 2-amino-2-methyl-1-propanol and the like. In addition, water is blended in the hair cosmetic composition as a solvent or dispersion medium for each component described above, and the concentration of each component is adjusted. The pH of the hair cosmetic 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 repairing hair by L-theanine can be sufficiently exerted.

  Furthermore, as other components, water-soluble polymers such as carboxyvinyl polymer and cationized polymer, preservatives such as methylparaben and phenoxyethanol, chelating agents, and fragrances can be blended.

  The hair cosmetic composition can be made into liquid, mist, gel, foam, cream and other dosage forms. This hair cosmetic composition is used as a hair care agent for shampoo, rinse, treatment and the like. This hair cosmetic 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 cosmetic composition after applying it to the hair without washing it away with water or warm water.

  This hair cosmetic composition is applied to hair treated with a hair treatment such as an oxidative hair dye, an acid hair dye, a bleaching agent, a permanent wave agent, a hair straightener, etc. Even when applied to hair damaged by factors other than the hair treatment agent, such as ultraviolet rays, the effect can be exhibited.

  Now, the hair cosmetic composition is prepared by blending the components (A) and (B) as a hair damage repair component, and blending the components (C) and the like as necessary. Is done. This hair cosmetic composition is used by applying an appropriate amount to hair damaged by, for example, hair dyeing with an oxidative hair dye. In such hair, hair keratin is damaged due to, for example, alteration of amino acids typified by reductive opening of cystine bonds, elution of amino acids due to degradation of hair keratin, and the like. At this time, the component (A) and the component (B) contained in the hair cosmetic composition act on the damaged portion of the hair keratin. That is, it is speculated that by using together the component (A) which is a specific amino acid and the component (B) which is a specific silicone, the binding strength of each component to damaged hair keratin is synergistically exhibited. Is done. Therefore, by using together (A) component and (B) component, each component acts effectively as a hair damage repair component. Furthermore, it is presumed that the state of the binding of the component (A) and the component (B) to the hair keratin, such as hydrogen bond and hydrophobic bond, is stable, and the sustainability of the repair effect by each component is sufficiently exhibited.

According to the embodiment described in detail above, the following effects are exhibited.
-The hair cosmetic composition of this embodiment contains (A) component and (B) component. These components are presumed to act synergistically on the damaged part of hair keratin and exert an excellent repair effect on such hair. Furthermore, it is presumed that the binding state of each component to the damaged hair is stable, and the durability of the repair effect is sufficiently exhibited. In particular, even if this hair cosmetic composition is applied to dyed hair, it is less likely to be affected by the color fading, etc. It can be demonstrated.

In addition, since the frictional resistance of the repaired hair is reduced by the component (B), the finger-penetrating property of the hair is improved. As a result, the feel of hair can be improved.
-It is preferable that the hair cosmetic composition of this embodiment further contains (C) component. This (C) component can make the touch of the hair excellent by improving the fingering property with respect to the hair restored | repaired by (A) component and (B) component.

In addition, the said embodiment can also be changed and comprised as follows.
-The component (C) may be omitted.
-You may contain amino acids other than the said L-theanine, and its derivative (s). The amino acids and derivatives thereof include glycine, sarcosine, dimethylglycine, betaine, alanine, β-alanine, α-aminobutyric acid, β-aminobutyric acid, γ-aminobutyric acid, γ-amino-β-oxobutyric acid, valine, β -Aminoisovaleric acid, γ-aminoisovaleric acid, norvaline, β-aminovaleric acid, γ-aminovaleric acid, δ-aminovaleric acid, leucine, isoleucine, norleucine, serine, α-methylserine, isoserine, α-methylisoserine , Cycloserine, homoserine, threonine, o-methylthreonine, allothreonine, o-methylallothreonine, roseonin, trans-3-aminocyclohexanecarboxylic acid, cis-3-aminocyclohexanecarboxylic acid, ε-aminecaproic acid, ω-amino Dodecanoic acid, β-hydroxyvaline, α-hydride Roxy-β-aminoisovaleric acid, cysteine, cystine, S-methylcysteine, S-methylcysteine-S-oxide, cysteic acid, homocysteine, homocystin, methionine, penicillamine, taurine, α, β-diaminopropionic acid, ornithine, Lysine, arginine, canalin, canavanine, δ-hydroxylysine, aspartic acid, asparagine, isoasparagine, glutamic acid, glutamine, isoglutamine, α-methylglutamic acid, β-hydroxyglutamic acid, γ-hydroxyglutamic acid, α-aminoadipic acid, citrulline , Lanthionine, cystathionine, phenylalanine, α-methylphenylalanine, o-chlorophenylalanine, m-chlorophenylalanine, p-chlorophenylalanine, o-fluoro Phenylalanine, m-fluorophenylalanine, p-fluorophenylalanine, β- (2-pyridyl) alanine, tyrosine, thyronine, dichlorotyrosine, dibromotyrosine, diiodotyrosine, 3,4-dihydroxyphenylalanine, α-methyl-3,4 -Dihydroxyphenylalanine, phenylglycine, tryptophan, abrin, histidine, 1-methylhistidine, 2-mercaptohistidine, proline, hydroxyproline, anthranilic acid, paraminol and salts thereof.

Next, the technical idea that can be grasped from the above embodiment will be described below.
(A) The component (C) is composed of methylpolysiloxane, methylphenylpolysiloxane, poly (oxyethylene / oxypropylene) methylpolysiloxane copolymer, polyoxyethylene / methylpolysiloxane copolymer, and polyoxypropylene / The hair cosmetic composition according to claim 2, which is a kind selected from methylpolysiloxane copolymers.

  (B) The hair cosmetic composition according to any one of claims 1, 2, and (a) further containing an oily component. According to this configuration, it is possible to improve the moist feeling of the hair restored by the component (A) and the component (B).

Next, the embodiment will be described more specifically with reference to examples and comparative examples.
(Examples 1-15, Comparative Examples 1-3)
First, a human black hair bundle subjected to hair dyeing treatment with an oxidative hair dye is prepared. The oxidative hair dye is composed of a first agent containing an oxidative dye and an alkali agent, and a second agent containing an oxidant. These 1st agent and 2nd agent were mixed by mass ratio of 1: 1, and after applying the mixture to a human black hair bundle, it was left 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. The composition of the oxidative hair dye is as shown below.
<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 dodecyl sulfate
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 Next, hair cosmetic compositions of each example shown in Table 1 and Table 2 were prepared and subjected to hair dyeing treatment. Each of these was applied to each human black hair bundle and allowed to adjust to the hair bundle. In Tables 1 and 2, the unit of the numerical value indicating the blending amount of each component is mass%.

Using the human black hair bundles thus treated with the oxidative hair dye and the hair cosmetic composition, the following hair repair performance and feel are evaluated, and the evaluation results are also shown in Tables 1 and 2.
<Hair repair performance>
(Strength evaluation)
About the human black hair bundle before and after processing with the hair cosmetic composition of each example, the breaking stress value was measured using a tensile tester (Tensilon (trade name) UTM-II, manufactured by Toyo Baldwin), and the increase in the value The rate was the strength increase rate (%). From the obtained strength increase rate, the strength of the hair was evaluated according to the following criteria.

Excellent (◎): Strength increase rate is 9% or more, Good (◯): Strength increase rate is 7% or more and less than 9%, slightly bad (△): Strength increase rate is 5% or more and less than 7%, Defective (×) : Strength increase rate is less than 5%.
(Sustainability assessment)
The human black hair bundle treated with the hair cosmetic composition of each example was stored for 5 days in a constant temperature and humidity chamber (25 ° C., relative humidity 55%), and then the breaking stress value was measured in the same manner as in the above strength evaluation. The sustainability was calculated from the breaking stress values according to the following equation.

Sustain rate (%) = [(fracture stress value after 5 days) / (fracture stress value immediately after treatment)] × 100
Based on the obtained sustainability rate, sustainability was evaluated according to the following criteria.
Excellent (◎): Sustain rate is 98% or more, Good (○): Sustain rate is 97% or more and less than 98%, Slightly poor (△): Sustain rate is 95% or more and less than 97%, Poor (x): Sustain rate Is less than 95%.
<Feel>
(Moist feeling)
Regarding the human black hair bundle treated with the hair cosmetic 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. An average score is calculated for the scoring results of five panelists, and when the average score is 3.6 points or more, “Excellent: ◎”, when 2.6 points or more and 3.5 points or less, “Good: ○” In the case of 1.6 points or more and 2.5 points or less, “slightly bad: Δ” and in the case of 1.5 points or less were “bad: ×”, and the evaluation results of moist feeling were obtained.
(Fingering)
Regarding the human black hair bundle treated with the hair cosmetic composition of each example, five panelists pass fingers, 4 points when the finger is very good, 3 points when it is good, 2 points when it is slightly bad, and Scoring was done in 4 stages, with 1 case being bad. An average score is calculated for the scoring results of five panelists, and when the average score is 3.6 points or more, “Excellent: ◎”, when 2.6 points or more and 3.5 points or less, “Good: ○” In the case of 1.6 points or more and 2.5 points or less, “slightly bad: Δ” and in the case of 1.5 points or less were “bad: ×”, and the evaluation results of the fingering property were obtained.

表１及び表２に示す結果から明らかなように、各実施例では（Ａ）成分及び（Ｂ）成分が含有されているため、強度評価及び持続性評価の結果は優れている。よって、各実施例では毛髪の修復効果が発揮され、かつその持続性も十分に発揮されることがわかる。その結果、うるおい感及び指通り性の評価も良好又は優れる結果となった。実施例６及び実施例１４の指通り性は、それぞれ実施例７及び実施例１５の指通り性よりも高い評価結果を示していることから、（Ｃ）成分によって指通り性が向上することがわかる。

As is clear from the results shown in Tables 1 and 2, in each Example, since the component (A) and the component (B) are contained, the results of strength evaluation and sustainability evaluation are excellent. Therefore, in each Example, it turns out that the repair effect of hair is exhibited and the sustainability is fully exhibited. As a result, the feeling of moisture and fingering evaluation were good or excellent. The fingering properties of Example 6 and Example 14 show higher evaluation results than the fingering properties of Example 7 and Example 15, respectively. Therefore, the fingering property can be improved by the component (C). Recognize.

In Comparative Examples 1-3, since either one of (A) component and (B) component is not contained, the result of strength evaluation and sustainability evaluation is inferior to each Example. Therefore, it can be seen that in each comparative example, the effect of repairing hair and the sustainability thereof are not exhibited more than in each example.

Claims (2)

A hair cosmetic composition comprising the following components (A) and (B):
(A) L-theanine (except for inclusion as a tea extract) .
(B) At least one selected from amino-modified silicone, ammonium-modified silicone and terminal hydroxyl group-modified dimethylpolysiloxane. Furthermore, the hair-cosmetics composition of Claim 1 which contains silicone derivatives other than the said (B) component as (C) component.