JP5502457B2 - Hair cosmetics - Google Patents

Description

  The present invention relates to a hair cosmetic.

  There are many people who are worried about the thick and hard hair inherent in Asians, including Japanese people, that they are uncomfortable and cannot be styled. In addition, hair damaged by hair dyeing treatment or permanent wave treatment, which has been frequently performed in recent years, has a more firm feel and promotes the above problems.

  Therefore, treatment agents containing quaternary ammonium salts typified by alkyltrimethylammonium and silicone as the main active ingredients are generally used in order to improve the hard feel of hair and the deterioration of feel caused by damage. In addition, techniques such as a combined use of a perfluoroalkyldioxyethylamine salt phosphate and a quaternary ammonium salt (Patent Document 1) and a method using a clay mineral (Patent Document 2) have also been proposed.

  All of these techniques reduce the frictional resistance between the hairs by adsorbing specific components on the surface of the hair, and give a soft feel when touching the hair. However, these components are easily removed from the hair by washing with daily shampoos, etc., so that the desired effect is hardly exhibited, and the effect is sufficiently satisfactory especially for thick and hard Asian hair. I didn't get it.

  On the other hand, it has been proposed to use an aromatic sulfone compound for the purpose of improving the setability and combability of the hair, and restoring the hair splash and swell due to damage to the original state (Patent Documents 3 and 3). 4).

Japanese Unexamined Patent Publication No. Hei 6-92044 JP 2005-170874 A JP-A-62-298625 JP 2006-347996

  The present invention relates to a hair cosmetic and hair that can reduce the elasticity of each hair and soften it, thereby improving the natural hard feel of thick Asian hair and the deterioration of the feel caused by hair damage. It is an object to provide a flexible method.

  The present inventor has found that the above-described problems can be solved by using an aromatic sulfone compound and carnitine in a hair cosmetic composition.

  The present invention provides hair cosmetics containing the following components (a) and (b) and having a pH of 2 to 8 at 25 ° C.

  (a) Aromatic sulfone compound represented by general formula (1) 0.1 to 20% by mass

[Wherein, Rs are the same or different and each represents a hydrogen atom or a monovalent hydrocarbon group, or two adjacent Rs together form a saturated or unsaturated divalent hydrocarbon group. X represents an oxygen atom or a nitrogen atom, Y represents a hydrogen atom when X is an oxygen atom, and Y represents a carbonyl group bonded to X when X is a nitrogen atom. Z ⁺ represents a monovalent cation. ]
(b) Carnitine or a salt thereof 0.01 to 5% by mass as the amount of carnitine

  Furthermore, this invention provides the hair softening method which applies said hair cosmetics to hair.

  According to the present invention, the elasticity of each hair can be reduced and softened to improve the natural hard feel of thick Asian hair and the deterioration of the feel caused by hair damage.

<Component (a): Aromatic sulfone compound>
The aromatic sulfone compound of component (a) is a compound represented by the general formula (1).

[Wherein, Rs are the same or different and each represents a hydrogen atom or a monovalent hydrocarbon group, or two adjacent Rs together form a saturated or unsaturated divalent hydrocarbon group. X represents an oxygen atom or a nitrogen atom, Y represents a hydrogen atom when X is an oxygen atom, and Y represents a carbonyl group bonded to X when X is a nitrogen atom. Z ⁺ represents a monovalent cation. ]

  Examples of the monovalent hydrocarbon group in R include an alkyl group, an aryl group, and an aralkyl group, an alkyl group having 1 to 8 (preferably 1 to 4) carbon atoms, and 6 to 10 (preferably 6 to 6) carbon atoms. The aryl group or aralkyl group of 8) is preferred, and specific examples include a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, a t-butyl group, a phenyl group, and a benzyl group.

  Examples of the saturated or unsaturated divalent hydrocarbon group formed by combining two adjacent Rs together include an alkylene group and an alkylidene group, and an alkylene having 2 to 6 (preferably 2 to 4) carbon atoms. Group or alkylidene group is preferable, for example, ethylene group, ethylidene group, vinylene group, trimethylene group, isopropylidene group, 1-propenylene group, tetramethylene group, 2-methyltrimethylene group, 1-methyltrimethylene group, 2- Examples include propenylene group, 2-butenylene group, buta-1,3-diene-1,4-diyl and the like. Specifically, when two adjacent R's together form buta-1,3-diene-1,4-diyl, tetramethylene group, 1-propenylene group, 2-propenylene group, trimethylene group, As the aromatic sulfone compound, naphthalene sulfonic acid, tetrahydronaphthalene sulfonic acid, indene sulfonic acid, and indane sulfonic acid are formed, respectively. Among them, naphthalene sulfonic acid is preferable.

  When X is an oxygen atom, Y represents a hydrogen atom, but R is preferably an alkyl group or two adjacent Rs together form an alkylidene group. On the other hand, when X is a nitrogen atom, Y represents a carbonyl group bonded to X, but R is preferably a hydrogen atom.

The aromatic sulfone compound of component (a) can have any monovalent cation Z ⁺ as a counter cation, where Z ⁺ can be a proton, an alkali metal ion (for example, sodium ion, potassium ion), ammonium Ions are preferred.

  More preferred examples of the aromatic sulfone compound of component (a) include benzenesulfonic acid or a salt thereof, paratoluenesulfonic acid or a salt thereof, 2,4-dimethylbenzenesulfonic acid or a salt thereof, and 2,5-dimethylbenzenesulfone. Examples thereof include acid or a salt thereof, naphthalenesulfonic acid or a salt thereof, saccharin or a salt thereof. Of these, p-toluenesulfonic acid or a salt thereof, 2,4-dimethylbenzenesulfonic acid or a salt thereof, naphthalenesulfonic acid or a salt thereof, or saccharin or a salt thereof is more preferable. These can be used alone or in combination of two or more.

  The content of the component (a) is 0.1 to 20% by mass in the hair cosmetic composition of the present invention in terms of the feel received from the composition during treatment and the storage stability of the composition, but 0.5 to 10% by mass is present. Preferably, 1 to 7% by mass is more preferable.

<Component (b): Carnitine or a salt thereof>
The component (b) is a component generally called carnitine, but may be any of L-carnitine, D-carnitine, and DL-carnitine. Moreover, the salt of an inorganic acid or an organic acid may be sufficient. Examples of the salt include carnitine hydrochloride and carnitine tartrate.

  The content of the component (b) is 0.01 to 5% by mass in the hair cosmetic composition of the present invention as the amount of carnitine in terms of the feel received from the composition during the treatment, but preferably 0.05 to 3% by mass, 0.1% -2 mass% is more preferable.

  Moreover, the content mass ratio (a) / (b) of the component (a) and the component (b) is preferably 0.1 to 10, more preferably 0.5 to 5, from the viewpoint of more reliably imparting flexibility to the hair. 0.5-5 is still more preferable.

  Further, the total content of the component (a) and the component (b) is preferably 0.5 to 10% by mass, more preferably 0.5 to 5% by mass in the hair cosmetic composition of the present invention from the same viewpoint as above. -5 mass% is still more preferable.

<Surfactant>
The hair cosmetic composition of the present invention can contain a surfactant. As the surfactant, any of a cationic surfactant, a nonionic surfactant, an amphoteric surfactant, and an anionic surfactant can be used.

  As the cationic surfactant, for example, a mono long chain alkyl quaternary ammonium salt is preferable, and specifically, cetrimonium chloride, steartrimonium chloride, behentrimonium chloride, stearalkonium chloride, benzalkonium chloride and the like. And steartrimonium chloride and behentrimonium chloride are more preferable.

  Nonionic surfactants include, for example, polyoxyalkylene alkyl ether, polyoxyalkylene alkenyl ether, higher fatty acid sucrose ester, polyglycerin fatty acid ester, higher fatty acid mono- or diethanolamide, polyoxyethylene hardened castor Examples thereof include oil, polyoxyethylene sorbitan fatty acid ester series, polyoxyethylene sorbite fatty acid ester series, alkyl saccharide series, alkylamine oxide series, and alkylamidoamine oxide series. Of these, polyoxyalkylene alkyl ethers and polyoxyethylene hydrogenated castor oil are preferred, and polyoxyethylene alkyl (C12-14) ethers are more preferred.

  Examples of amphoteric surfactants include imidazoline series, carbobetaine series, amide betaine series, sulfobetaine series, hydroxysulfobetaine series, and amide sulfobetaine series.

  Anionic surfactants include, for example, alkylbenzene sulfonates, alkyl or alkenyl ether sulfates, alkyl or alkenyl sulfates, olefin sulfonates, alkane sulfonates, saturated or unsaturated fatty acid salts, Examples include alkyl or alkenyl ether carboxylate series, α-sulfone fatty acid salt series, N-acyl amino acid series, phosphate mono- or diester series, and sulfosuccinate series. Examples of alkyl ether sulfates include polyoxyethylene alkyl ether sulfates. Examples of the counter ion of the anionic group of these anionic surfactants include alkali metal ions such as sodium ion and potassium ion; alkaline earth metal ions such as calcium ion and magnesium ion; ammonium ion; Examples include alkanolamines having 1 to 3 alkanol groups (for example, monoethanolamine, diethanolamine, triethanolamine, triisopropanolamine, etc.).

  The surfactant content varies depending on the intended use of the hair cosmetic and the function of each surfactant (improvement of touch, emulsifying ability, washing ability, etc.), but 0.01 to 20 mass in the hair cosmetic of the present invention. % Is preferable, 0.1 to 15% by mass is more preferable, and 0.5 to 10% by mass is even more preferable.

<Conditioning ingredients>
The hair cosmetic composition of the present invention can further contain a conditioning component selected from a cationic polymer, silicone and oil. Such conditioning components can remain in the hair moderately and give a good conditioning effect.

-Cationic polymer The cationic polymer is used for the purpose of improving the feel of hair during use. The cationic polymer refers to a polymer having a cationic group or a group that can be ionized into a cationic group, and includes an amphoteric polymer that becomes cationic as a whole. That is, examples of the cationic polymer include water-soluble ones containing an amino group or an ammonium group in the side chain of the polymer chain, or containing a diallyl quaternary ammonium salt as a structural unit. Derivatives, cationic starch, cationized guar gum derivatives, polymers or copolymers of diallyl quaternary ammonium salts, quaternized polyvinylpyrrolidone derivatives, and the like. Among these, diallyl quaternary ammonium salt is included as a structural unit in terms of softness during shampooing, smoothness and ease of fingering, ease of consolidation during drying and moisturizing effect, and stability of the agent. Polymers, quaternized polyvinylpyrrolidone derivatives, and cationized cellulose derivatives are preferred, and polymers or copolymers of diallyl quaternary ammonium salts and cationized cellulose derivatives are more preferred.

  Specific examples of the cationic polymer include dimethyldiallylammonium chloride polymer (Polyquaternium-6, such as Marquat 100; Nalco Japan), dimethyldiallylammonium chloride / acrylic acid copolymer (Polyquaternium-22, such as Marquat 280, Marquat 295, etc. Nalco Japan), dimethyldiallylammonium chloride / acrylamide copolymer (polyquaternium-7, such as Marquat 550; Nalco Japan), quaternized polyvinylpyrrolidone derivatives (Guffcoat 734, Guffcoat 755, Guffcoat 755N; ASP Japan) ), Cationized cellulose derivatives (polyquaternium-10, such as Leogard G, GP; Lion, polymer JR-125, polymer JR-30M, polymer LR-400, polymer LR-30M; above, Dow Chemical Japan ), And the like.

  Two or more of these cationic polymers may be used in combination. The content of the cationic polymer is preferably from 0.001 to 20% by mass, more preferably from 0.01 to 10% by mass, and more preferably from 0.05 to 5% by mass in the hair cosmetic composition of the present invention, from the viewpoint of improving the feel and stability of the composition. % Is more preferable.

-Silicone The hair cosmetic composition of the present invention is used for the purpose of imparting an excellent feeling of use. Examples of silicone include polydimethylsiloxane, modified silicone (for example, amino-modified silicone, fluorine-modified silicone, alcohol-modified silicone, polyether-modified silicone, epoxy-modified silicone, alkyl-modified silicone, etc.), cyclic polydimethylsiloxane, and aminopolyether. Examples thereof include modified silicones and highly polymerized methylpolysiloxane emulsions, and polydimethylsiloxanes, polyether-modified silicones, amino-modified silicones, cyclic polydimethylsiloxanes, aminopolyether-modified silicones, and highly polymerized methylpolysiloxane emulsions are preferred.

  These silicones are commercially available, for example, BY11-026, BY22-19, FZ-3125, SH200-1,000,000cs (Toray Dow Corning), TSF451-100MA (Momentive Performance Materials Japan) ), KM-9716 (Shin-Etsu Chemical Co., Ltd.) [Polydimethylsiloxane], TSF4440 (Momentive Performance Materials Japan), KF-6005, KF-6011, KF-353A (Shin-Etsu Chemical Co., Ltd.) [ Polyether-modified silicone], SF8451C, SF8452C, SF8457C, DC929, DC8500, SS-3551, SM8704C, SM8904 (Toray Dow Corning), KF-867 (Shin-Etsu Chemical), KT1989 (Momentive Performance Materials)・ Japan) [above amino-modified silicone], SH244, SH245 (Toray Dow Corning) [above cyclic polydimethylsiloxane], SS-3588 (Toray Dow Corning) [More amino polyether-modified silicone], include BY22-060 (Dow Corning Toray) [more highly polymerized methylpolysiloxane emulsion] and the like.

  The content of the silicone is preferably 0.1 to 20% by mass, and more preferably 0.5 to 15% by mass in the hair cosmetic composition of the present invention, from the viewpoint of sufficient effects and suppression of stickiness.

-Oil agent Oil agent is used for the purpose of improving the feel of hair during use and after drying, and imparting stability. Oils include hydrocarbons such as squalene, squalane, petrolatum, paraffin, liquid paraffin, liquid isoparaffin, cycloparaffin; glycerides such as castor oil, cocoa oil, mink oil, avocado oil, olive oil, shea butter; beeswax, whale wax Waxes such as lanolin and carnauba wax; isopropyl palmitate, isopropyl myristate, octyldodecyl myristate, hexyl laurate, cetyl lactate, propylene glycol monostearate, oleyl oleate, hexadecyl 2-ethylhexanoate, isononyl isononanoate, isononane Ester oil such as tridecyl acid; capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, lanolin fatty acid, iso fatty acid, anteiso fatty acid, coconut oil Higher fatty acids such as fatty acid, 18-methyleicosanoic acid, 16-methyloctadecanoic acid; higher fatty acids such as myristyl alcohol, cetyl alcohol, oleyl alcohol, stearyl alcohol, isostearyl alcohol, behenyl alcohol, 2-octyldodecanol, cetostearyl alcohol Alcohol; other examples include isostearyl glyceryl ether and polyoxypropylene butyl ether. Of these, higher alcohols are preferred.

  These oil agents may be used alone or in combination of two or more. In addition, the content is preferably 0.1 to 20% by mass, more preferably 0.5 to 15% by mass in the hair cosmetic composition of the present invention, from the viewpoint of improvement in touch and stability.

<Medium>
In the hair cosmetic composition of the present invention, water and, if necessary, an organic solvent are used as a medium.
Examples of organic solvents include lower alkanols such as ethanol and 2-propanol; aromatic alcohols such as benzyl alcohol and benzyloxyethanol; polyols such as propylene glycol, 1,3-butanediol, diethylene glycol and glycerin; ethyl cellosolve and butyl cellosolve Cellosolve; carbitols such as ethyl carbitol and butyl carbitol. Of these, aromatic alcohols and polyols are preferred.

<Others>
In addition to the above components, other components that are usually used as cosmetic raw materials can be added to the hair treatment composition of the present invention. Such optional components include preservatives, chelating agents, stabilizers, antioxidants, plant extracts, herbal extracts, protein hydrolysates, vitamins, coloring agents such as dyes, fragrances, UV absorbers, Examples include pearlizing agents such as ethylene glycol difatty acid esters, setting polymers, and amphiphilic amide lipids.

  Examples of the set polymer include: Polysilicone-9; polyvinylpyrrolidone-based polymer (for example, polyvinylpyrrolidone, vinylpyrrolidone / vinyl acetate copolymer, vinylpyrrolidone / vinyl acetate / vinyl propionate terpolymer, vinylpyrrolidone / Alkylaminoacrylate (quaternary chloride) copolymer, vinylpyrrolidone / acrylate / (meth) acrylic acid copolymer, vinylpyrrolidone / alkylaminoacrylate / vinylcaprolactam copolymer, etc.); methyl vinyl ether / maleic anhydride alkyl half ester Copolymer; acidic polyvinyl acetate polymer (for example, vinyl acetate / crotonic acid copolymer, vinyl acetate / crotonic acid / vinyl neodecanoate copolymer, vinyl acetate / crotonic acid / vinyl propionate copolymer, etc.); acid (Meth) acrylic polymers (for example, (meth) acrylic acid / (meth) acrylic acid ester copolymers, acrylic acid / acrylic acid alkyl ester / alkylacrylamide copolymers, etc.); amphoteric acrylic polymers (for example, N- Methacryloylethyl-N, N-dimethylammonium / α-N-methylcarboxybetaine / butyl methacrylate copolymer, hydroxypropyl acrylate / butylaminoethyl methacrylate / octylamide copolymer)); acrylamide / acrylic acid Examples include ester copolymers; chitin / chitosan compounds (for example, hydroxypropyl chitosan, carboxymethyl chitin, carboxymethyl chitosan, etc.).

  Specific examples of the amphiphilic amide lipid include a diamide compound represented by the general formula (2) and an amide compound represented by the general formula (3).

In the formula, R ¹ represents a linear or branched hydrocarbon group having 1 to 12 carbon atoms which may be substituted by a hydroxyl group and / or an alkoxy group, and R ² represents a linear or branched chain having 1 to 5 carbon atoms. R ³ represents a linear or branched divalent hydrocarbon group having 1 to 22 carbon atoms.

[Wherein, R ⁴ represents a linear, branched or cyclic saturated or unsaturated hydrocarbon group having 4 to 30 carbon atoms which may be substituted by a hydroxy group, an oxo group or an amino group, and W represents a methylene group. , A methine group or an oxygen atom, a broken line indicates the presence or absence of a π bond, X ¹ represents a hydrogen atom, an acetyl group or a glyceryl group, or forms an oxo group with an adjacent oxygen atom, X ² , X ³ and X ⁴ each independently represent a hydrogen atom, a hydroxy group or an acetoxy group (provided that when W is a methine group, one of X ² and X ³ is a hydrogen atom and the other does not exist; When O-X ¹ is an oxo group, X ⁴ is not present), R ⁵ and R ⁶ each independently represent a hydrogen atom, a hydroxy group, a hydroxymethyl group or an acetoxymethyl group, and R ⁷ is a hydroxy group or An amino group that may be substituted; A chain, branched chain, or cyclic saturated hydrocarbon group, or a linear, branched, or cyclic saturated or unsaturated fatty acid having 8 to 22 carbon atoms that may be substituted with a hydroxy group at the ω position of the hydrocarbon group R ⁸ represents a hydrogen atom or a linear or branched chain having 1 to 8 carbon atoms which may have a substituent selected from a hydroxy group, a hydroxyalkoxy group, an alkoxy group and an acetoxy group Represents a saturated or unsaturated hydrocarbon group. ]

<PH>
The hair cosmetic composition of the present invention has a pH of 2 to 8, preferably 2.5 to 7, more preferably 3 from the viewpoint of low irritation to the scalp and the like and hydrolysis stability of the component (a). ~ 5. For this adjustment, a pH adjusting agent can be further used.

  As pH adjusting agents, as alkaline agents, ammonia and salts thereof; alkanolamines and salts thereof such as monoethanolamine, isopropanolamine, 2-amino-2-methylpropanol, 2-aminobutanol; 1,3-propanediamine, etc. Alkanediamines and salts thereof; carbonates such as guanidine carbonate, sodium carbonate, potassium carbonate, sodium bicarbonate, potassium bicarbonate; hydroxides such as sodium hydroxide and potassium hydroxide can be used. In addition, as acid agents, organic acids such as citric acid, glycolic acid, lactic acid and malic acid; inorganic acids such as hydrochloric acid and phosphoric acid; hydrochlorides such as monoethanolamine hydrochloride; monopotassium dihydrogen phosphate and monohydrogen phosphate Phosphate such as disodium can be used. Among these, it is preferable to mix an organic acid.

  These pH adjusters may be used alone or in combination with an acid agent alone, and the content thereof is 0.01% in the hair cosmetic composition of the present invention in terms of reducing hair damage and scalp irritation. -20% by mass is preferable, and 0.1-15% by mass is more preferable.

<Dosage form>
The dosage form of the hair cosmetic composition of the present invention can be in the form of, for example, liquid, emulsion, cream, gel, paste, mousse or aerosol.

  The hair cosmetic composition of the present invention can be suitably used for in-bath agents such as shampoos, rinses, conditioners and treatments; out-bath agents such as hair mousses, hair oils and styling agents.

<Hair softening method>
The hair cosmetic composition of the present invention can soften hair by applying to the hair. In other words, in the case of an invasion agent, it may be applied to wet hair, left as it is for a certain period of time if necessary, and then washed off. In the case of an outbath agent, an appropriate amount may be applied to the hair (whether dry or moist after washing) and applied to the entire hair. This reduces the elasticity of each hair by acting on the inside of the hair and softens it, improving the natural hard feel of thick Asian hair and the deterioration of the feel caused by hair damage. Can do.

Examples 1-2 and Comparative Examples 1-3 (Shampoo composition)
[Bend elastic modulus ratio]
The shampoo composition shown in Table 1 was prepared, and the ratio of flexural modulus was measured according to the following procedure.

[1] Measurement of flexural modulus (before treatment)
Ten Japanese hairs that had not been chemically treated were cut to a length of 6 cm and immersed in ion-exchanged water for 3 hours. Next, 10 pieces were linearly shaped and then left to dry for 24 hours in a constant temperature and humidity room at a room temperature of 20 ° C. and a relative humidity of 65%. After shaping, one of 10 pieces was taken out in the same constant temperature and humidity room, and the bending elastic modulus of one hair was measured using a bending tester FB2-SH manufactured by Kato Tech Co., Ltd. Similarly, the flexural modulus was measured for the remaining nine and the average value D of ten was determined.

[2] Hair Washing Step 10 hairs whose D was measured in the above [1] were fixed to a 1 g Japanese hair bundle prepared separately. 0.3 g of the shampoo composition of each example and comparative example shown in Table 1 was applied to 1 g of the hair bundle with 10 hairs fixed thereto, and after foaming well, it was rinsed with water at about 40 ° C.

[3] Measurement of flexural modulus (after processing)
Ten hairs for which D was measured in [1] were taken out from the hair bundle subjected to the above treatment [2]. Next, 10 pieces were bundled into a bundle and formed into a linear shape, and then allowed to dry for 24 hours in a constant temperature and humidity room at a room temperature of 20 ° C. and a relative humidity of 65%. After shaping, one of 10 pieces was taken out in the same constant temperature and humidity room, and the bending elastic modulus of one hair was measured using a bending tester FB2-SH manufactured by Kato Tech Co., Ltd. Similarly, the flexural modulus was measured for the remaining nine pieces, and the average value D ′ of ten pieces was obtained.

[4] Ratio calculation of flexural modulus Using the values of flexural modulus obtained in [1] and [3] above, the ratio of flexural modulus was calculated from the following formula. The results are also shown in Table 1. The smaller the value of D ′ / D, the softer the hair after treatment.

                  (Bend elastic modulus ratio) = D '/ D

Example 3, Comparative Example 4 (Conditioner composition)
Conditioner compositions shown in Table 2 were prepared.
[Bend elastic modulus ratio]
In [2] of [Bend elastic modulus ratio], 0.3 g of the shampoo composition of Example 1 or Comparative Example 1 shown in Table 1 was applied and well foamed, and then rinsed with water at about 40 ° C. Next, 0.3 g of the conditioner composition of Example 3 or Comparative Example 4 shown in Table 2 was applied in the combination shown in Table 3 and thoroughly blended, and then rinsed with water at about 40 ° C.
Other steps were performed in the same manner as described above, and the ratio of flexural modulus was obtained. The results are shown in Table 3.

[Feel evaluation]
[1] Preparation of damaged hair Using a 20cm long Japanese hair that has not been chemically treated, 5g of a hair bundle is prepared, 5g of the decolorizer composition shown in Table 4 is applied, and left at 30 ° C for 20 minutes. did. Thereafter, washing with an evaluation shampoo shown in Table 5 and washing with water were repeated twice. Next, towel drying was performed, the upper end of the hair bundle was fixed, and the hair was naturally dried. The above decolorization step was further repeated to produce damaged hair.

[2] Treatment with shampoo and conditioner Apply 1.5 g of the shampoo composition of Example 1 shown in Table 1 to the damaged hair bundle obtained in [1] above, foam it well, and then add water at about 40 ° C. I'm sorry. Next, 1.5 g of the conditioner composition of Example 3 shown in Table 2 was applied and blended well, and then rinsed with water at about 40 ° C. Finally, towel drying was performed, and the upper end of the hair bundle was fixed and air dried.
On the other hand, with respect to the damaged hair bundle obtained in [1], 1.5 g of the shampoo composition of Comparative Example 1 shown in Table 1 and 1.5 g of the conditioner composition of Comparative Example 4 shown in Table 2 were used. The same process was performed.

[3] Evaluation Criteria Regarding the softness of the hair after drying the hair, five professional panelists conducted a sensory test according to the following criteria. The results are ranked according to the average score of five people and are shown in Table 6.

<Softness of hair>
4: Very soft 3: Soft 2: Can't say either 1: Wrinkled 0: Very wrinkled

<Evaluation>
◎: Average evaluation score is 3.5 or more ○: Average evaluation score is 2.5 or more and less than 3.5 △: Average evaluation score is 1.5 or more and less than 2.5 ×: Average evaluation score is less than 1.5

  The hair cosmetic composition of the present invention is one that reduces the elasticity of each hair and softens it, and improves the feeling of touch associated with damage.

Claims (4)

The following components (a) and (b) are contained, the mass ratio (a) / (b) of the components (a) and (b) is 0.1 to 10, and the pH at 25 ° C. is 2 to 8. Some hair cosmetics.
(a) Aromatic sulfone compound represented by general formula (1) 0.1 to 20% by mass

[Wherein, Rs are the same or different and each represents a hydrogen atom or a monovalent hydrocarbon group, or two adjacent Rs together form a saturated or unsaturated divalent hydrocarbon group. X represents an oxygen atom or a nitrogen atom, Y represents a hydrogen atom when X is an oxygen atom, and Y represents a carbonyl group bonded to X when X is a nitrogen atom. Z ⁺ represents a monovalent cation. ]
(b) Carnitine or a salt thereof 0.01 to 5% by mass as the amount of carnitine The total content of the component (a) and (b), the hair cosmetic according to claim 1 from 0.5 to 10% by weight. The hair cosmetic according to claim 1 or 2, wherein the component (a) is at least one selected from para-toluenesulfonic acid, 2,4-dimethylbenzenesulfonic acid, naphthalenesulfonic acid, saccharin, and salts thereof. The hair softening method which applies the hair cosmetics of any one of Claims 1-3 to hair.