JP2006104162A - Hair cosmetic composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a hair cosmetic composition exerting restorative effect on damaged hair and fully exerting the sustainability of the effect as well. <P>SOLUTION: This hair cosmetic composition comprises (A) L-theanine and (B) a quaternary ammonium alkyl sulfate salt-type cationic surfactant. It is preferable that the hair cosmetic composition contains (C) a silicone derivative as well. <P>COPYRIGHT: (C)2006,JPO&NCIPI

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 quaternary ammonium salt of a fatty acid as a hair damage repair component.
JP-A-9-143135 JP-A-10-139620

  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, the effect was not satisfactory, and the sustainability was not sufficiently obtained.

  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 sufficiently exhibits its sustainability. It is to provide.

  In order to achieve the above object, the hair cosmetic composition of the invention according to claim 1 contains (A) L-theanine and (B) a quaternary ammonium alkyl sulfate type cationic surfactant. Is the gist.

  The hair cosmetic composition of the invention described in claim 2 is characterized in that, in the invention described in claim 1, it further contains (C) a silicone derivative.

  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 can be provided.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments embodying the present invention will be described in detail.
The hair cosmetic composition of the present embodiment contains (A) L-theanine and (B) a quaternary ammonium salt alkyl sulfate type cationic surfactant. 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) Quaternary ammonium alkyl sulfate type cationic surfactants include quaternary ammonium methyl sulfate type cationic surfactants, quaternary ammonium ethyl sulfate type cationic surfactants, and the like. Are dibehenyldimethylammonium sulfate, behenyltrimethylammonium methylsulfate, stearyltrimethylammonium methylsulfate, cetyltrimethylammonium sulfate, methylsulfate coconut oil fatty acid alkyltrimethylammonium, methylsulfate rapeseed oil fatty acid ethylhydroxyethylmethylammonium, dimethylsulfate Stearoyl ethyl hydroxyethyl methylammonium, methyl sulfate dipalmitoyl ethyl hydroxyethyl methylammonium, methyl sulfate dicoconut oil fatty acid ethyl hydroxyethyl methyl Ammonium, behenate sulfate fatty acid amidopropylethyldimethylammonium, ethyl sulfate lanolin fatty acid aminopropylethyldimethylammonium, ethyl sulfate lanolin fatty acid aminoethyltriethylammonium, ethyl sulfate lanolin fatty acid aminoethyl diethylmethylammonium, ethyl sulfate lanolin fatty acid aminoethyltrimethylammonium, Ethanol sulfate lanolin fatty acid aminopropyl triethylammonium, methyl sulfate lanolin fatty acid aminoethyltrimethylammonium, methyl sulfate lanolin fatty acid aminopropylethyldimethylammonium, ethylsulfate isoalkanoic acid (14-20) aminopropylethyldimethylammonium, ethylsulfate isoalkanoic acid (18- 22) Aminopropylethyldimethyla Moniumu, ethyl isostearate aminopropyl dimethylammonium sulfate, and ethyl isononanoate aminopropyl dimethylammonium sulfate.

  These components (B) may be blended singly or in combination of two or more. Among these components (B), since the hair repair effect is further exhibited by the combined use with the component (A), preferably dibehenyldimethylammonium sulfate, behenyltrimethylammonium sulfate, stearyltrimethylammonium sulfate , Methyl sulfate cetyl trimethyl ammonium, methyl sulfate palm oil fatty acid alkyl trimethyl ammonium, methyl sulfate dirapeseed seed oil fatty acid ethyl hydroxyethyl methyl ammonium, methyl sulfate distearoyl ethyl hydroxyethyl methyl ammonium, methyl sulfate dipalmitoyl ethyl hydroxyethyl methyl ammonium, methyl sulfate Coconut oil fatty acid ethyl hydroxyethyl methylammonium, ethyl sulfate behenate amidopropylethyldimethylammonium It is one selected from the group consisting of Le lanolin fatty aminopropyl dimethylammonium sulfate.

  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 become heavy.

  (C) It is preferable that the silicone derivative is blended in order to improve the touch of the hair and the feeling of moisture with respect to the hair whose damage has been repaired by L-theanine, thereby improving the feel of the hair. Specific examples of silicone derivatives include dimethyl silicone, methyl phenyl silicone, cyclic dimethyl silicone, cyclic silicone, methyl hydrogen silicone, amino modified silicone, ammonium modified silicone, terminal hydroxyl group modified dimethyl polysiloxane, alcohol modified silicone, aliphatic alcohol modified. Examples thereof include silicone, alkyl-modified silicone, polyether-modified silicone, epoxy-modified silicone, and fluorine-modified silicone. Specifically, octamethylcyclotetrasiloxane, octamethyltrisiloxane, methylpolysiloxane (dimethicone), dimethylsiloxane / methylstearoxysiloxane copolymer, dimethylsiloxane / methylcetyloxysiloxane copolymer, stearoxytrimethylsilane, Stearoxymethyl polysiloxane, decamethylcyclopentasiloxane, decamethyltetrasiloxane, tetradecamethylcycloheptasiloxane, tetradecamethylhexasiloxane, tetrahydrotetramethylcyclotetrasiloxane, dodecamethylcyclohexasiloxane, tris (tributoxysiloxy) Methylsilane, trimethylsiloxysilicic acid, bisphenyldodecamethylhexasiloxane, hexadecylmethylcyclopolysiloxane, Samethylcyclotrisiloxane, hexamethyldisiloxane, poly (oxyethylene / oxypropylene) methylpolysiloxane copolymer, polyoxyethylene / methylpolysiloxane copolymer, polyoxypropylene / methylpolysiloxane copolymer, polymethacryl Methyl / dimethylpolysiloxane graft copolymer, methylcyclopolysiloxane, methylhydrogenpolysiloxane, methylphenylpolysiloxane, methylpolysiloxane / cetylmethylpolysiloxane / poly (oxyethylene / oxypropylene) methylpolysiloxane copolymer And poly (oxyethylene / oxypropylene) / butylene / methylpolysiloxane copolymer.

  These (C) components may be blended singly or in combination of two or more. Among these components (C), it is possible to improve the fingering of the hair without inhibiting the action of L-theanine, so that methylpolysiloxane, octamethyltrisiloxane, decamethylcyclopentasiloxane and methylphenyl It is preferably at least one selected from polysiloxanes.

  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 improve the fingering property. On the other hand, if it exceeds 10% by mass, it is difficult to obtain a further improvement effect and the hair may become sticky.

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.

  Oils include olive oil, rosehip 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, cocoa 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, palm oil, mink oil, egg yolk oil, etc. Is mentioned. 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. 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 a nonionic surfactant, a cationic surfactant other than the component (B), an anionic surfactant, and an amphoteric surfactant.
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.

  As cationic surfactants other than the component (B), 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 bromide Examples include ammonium, stearyltrimethylammonium saccharin, cetyltrimethylammonium saccharin, and the like.

  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, 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, fragrances and the like 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 agent such as an oxidative hair dye, an acid hair dye, a bleach 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 component (A) and the component (B) as a hair damage repairing component, and blending the component (C) as necessary, and mixing each component. 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, by combining the component (A) that is a specific amino acid and the component (B) that is a specific cationic surfactant, the binding power of each component to damaged hair keratin is exhibited synergistically. Presumed to be. 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 a 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 contains (C) component further. This (C) component can make the touch of the hair excellent by improving the finger passability 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.
-The hair cosmetic composition according to claim 1 or 2, further comprising an oily component. According to this configuration, the hair feel can be improved by imparting a moist feeling to the repaired hair by the component (A) and the component (B).

Next, the embodiment will be described more specifically with reference to examples and comparative examples.
(Examples 1-12, 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 ・ ・ ・ ・ ・ ・ ・ ・ 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 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)
For the human black hair bundle treated with the hair cosmetic composition of each example, 5 panelists pass fingers, 4 points when the finger is very good, 3 points when good, 2 points when 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１２に対し、実施例２ではうるおい感及び指通り性のいずれも優れる評価結果であることから、（Ｃ）成分の配合による作用効果が発揮されていることがわかる。

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. Compared to Example 12, in Example 2, both the feeling of moisture and the fingering property are excellent evaluation results. Thus, it can be seen that the effect of the blending of component (C) is exhibited.

  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 hair repairing effect and its sustainability are not exhibited more than in each example. In Comparative Example 1, behenyltrimethylammonium chloride, which is a cationic surfactant other than the component (B), is contained. However, the strength evaluation and sustainability evaluation of Comparative Example 1 are inferior to each example. Therefore, it can be seen that by containing the component (B) which is a specific cationic surfactant with respect to the component (A), the hair repair effect is exhibited and the sustainability is sufficiently exhibited. .

Claims (2)

A hair cosmetic composition comprising (A) L-theanine and (B) a quaternary ammonium alkyl sulfate type cationic surfactant. The hair cosmetic composition according to claim 1, further comprising (C) a silicone derivative.