WO2021141105A1

WO2021141105A1 - Hair treatment agent, additive and hair treatment method

Info

Publication number: WO2021141105A1
Application number: PCT/JP2021/000440
Authority: WO
Inventors: 真也岡部
Original assignee: 株式会社資生堂
Priority date: 2020-01-08
Filing date: 2021-01-08
Publication date: 2021-07-15
Also published as: CN114929187A; JPWO2021141105A1

Abstract

This hair treatment agent comprises a first treatment agent and a second treatment agent. The first treatment agent contains an alkaline agent. The second treatment agent contains an oxidant. At least one of the first treatment agent and the second treatment agent contains a cyclitol-based sugar alcohol.

Description

Hair treatment agents, additives, and hair treatment methods

Related application

The present invention is based on the priority claim of Japanese patent application: Japanese Patent Application No. 2020-1755 (filed on January 8, 2020), and all the contents of the application are incorporated in this document by citation. Shall be.

This disclosure relates to a hair treatment agent. The present disclosure relates to additives added to hair treatment agents. The present disclosure also relates to methods of treating hair.

In hair dyeing treatment (hair coloring), the cuticle is usually opened by treating the hair with an alkaline agent, and the decomposition of the melanin pigment in the hair and the penetration of the dye into the hair are promoted. For example, the hair coloring agent described in Patent Document 1 contains an alkaline agent for opening the cuticle.

The hair treatment agent composition described in Patent Document 2 contains inositol and a cellulose derivative. Patent Document 2 describes that by combining inositol and a cellulose derivative, the feel of damaged hair and the strength of hair are improved.

Japanese Patent No. 5606590 Japanese Unexamined Patent Publication No. 2008-169186

The following analysis is given from the perspective of this disclosure.

The main component of hair is protein. Proteins are denatured by alkaline agents. Therefore, when the hair is treated with a hair treatment agent containing an alkaline agent as described in Patent Document 1, the cuticle is opened and the protein of the hair is denatured by the alkaline agent. As a result, for example, the flexibility of the hair is lost and the strength is reduced.

It is described that the hair treatment agent composition described in Patent Document 2 cannot improve the strength of hair unless inositol and a cellulose derivative are combined. That is, inositol alone cannot obtain the effect of improving hair strength. Further, the hair treatment agent composition described in Patent Document 2 treats damaged hair, and does not suppress hair damage due to hair coloring.

Therefore, means and methods capable of suppressing protein denaturation of hair caused by hair coloring and the like are desired.

According to the first aspect of the present disclosure, a hair treatment agent that suppresses hair denaturation is provided. Hair treatment agents include cyclitol sugar alcohols.

According to the second viewpoint of the present disclosure, a hair treatment agent containing 0.1% by mass or more of an alkaline agent and a cyclitol-based sugar alcohol is provided.

According to the third viewpoint of the present disclosure, a hair treatment agent having a first treatment agent and a second treatment agent is provided. The first treatment agent contains an alkaline agent. The second treatment agent contains an oxidizing agent. At least one of the first treatment agent and the second treatment agent contains a cyclitol-based sugar alcohol.

According to the fourth viewpoint of the present disclosure, a hair treatment agent having a first treatment agent, a second treatment agent, and a third treatment agent is provided. The first treatment agent contains an alkaline agent. The second treatment agent contains an oxidizing agent. The third treatment agent contains a cyclitol sugar alcohol.

According to the fifth aspect of the present disclosure, the present invention includes a first treatment step of treating the hair with at least one of an alkaline agent and heat, and a second treatment step of treating the hair with a cyclitol sugar alcohol. A method of treating hair is provided.

According to the sixth aspect of the present disclosure, an additive to be added to the hair treatment agent is provided. Additives include cyclitol sugar alcohols.

According to the hair treatment agent, additive, and hair treatment method of the present disclosure, it is possible to prevent the hair from being denatured and deteriorated by an alkaline agent or heat.

The graph which shows the stress at the time of 20% elongation in a test example. Graph showing an endothermic peak of the peak temperature (T _D) in Test Example. The graph which shows the specific enthalpy (ΔH) in a test example. The graph which shows the stress at the time of 20% elongation in a test example. The graph which shows the stress at the time of 20% elongation in a test example. The graph which shows the stress at the time of 20% elongation in a test example.

The preferred forms of each of the above viewpoints are described below.

According to the preferred form of the first viewpoint, the hair treatment agent is for suppressing the degeneration of hair due to at least one of an alkaline agent and heat.

According to the preferred form of the second viewpoint, the hair treatment agent further contains an oxidizing agent.

According to the preferred forms of the first viewpoint and the second viewpoint, the hair treatment agent is a solution containing 0.005% by mass to 20% by mass of a cyclitol-based sugar alcohol with respect to the mass of the hair treatment agent.

According to the preferred form of the third viewpoint, it is a mixture of the first treatment agent and the second treatment agent.

According to the preferred embodiment of the third viewpoint, the mixture contains 0.005% by mass or more of cyclitol-based sugar alcohol with respect to the mass of the mixture.

According to the preferred form of the third viewpoint, the pH of the mixture is 9 to 13.

According to the preferred form of the third viewpoint, after the first treatment agent is applied to the hair, the second treatment agent is applied to the portion to which the first treatment agent is applied and used.

According to the preferred embodiment of the third viewpoint, the first treatment agent contains 0.01% by mass or more of the cyclitol-based sugar alcohol with respect to the mass of the first treatment agent.

According to the preferred form of the third viewpoint, the pH of the first treatment agent is 8 to 13.

According to the preferred embodiment of the fourth viewpoint, it is a mixture of the first treatment agent, the second treatment agent, and the third treatment agent.

According to the preferred embodiment of the fourth viewpoint, the mixture contains 0.005% by mass or more of cyclitol-based sugar alcohol with respect to the mass of the mixture.

According to the preferred form of the fourth viewpoint, the pH of the mixture is 9 to 13.

According to the preferred form of the fourth viewpoint, the hair treatment agent is used by applying the first treatment agent to the hair and then applying the second treatment agent to the portion to which the first treatment agent is applied. ..

According to the preferred form of the fourth viewpoint, the pH of the first treatment agent is 8 to 13.

According to the preferred embodiment of the fourth viewpoint, the third treatment agent is used by being mixed with the first treatment agent. The mixture of the first treatment agent and the third treatment agent contains 0.005% by mass or more of cyclitol-based sugar alcohol with respect to the mass of the mixture.

According to the preferred form of the fourth viewpoint, the third treatment agent is a treatment agent applied to the hair before applying the first treatment agent. The third treatment agent is a solution containing 0.005% by mass or more of a cyclitol-based sugar alcohol.

According to the preferred forms of the third and fourth viewpoints, the cyclitol sugar alcohol is at least one selected from the group consisting of inositol, ononitol, pinitol, bornesitol, quinic acid, conduritol, and shikimic acid.

According to the preferred form of the fifth viewpoint, the second treatment step is performed, and the first treatment step is performed on the hair portion to which the second treatment step is applied.

According to the preferred embodiment of the fifth viewpoint, the first processing step and the second processing step are performed at the same time.

According to the preferred embodiment of the fifth viewpoint, in the second treatment step, a solution containing 0.005% by mass to 20% by mass of cyclitol-based sugar alcohol is applied to the hair.

According to the preferred form of the fifth viewpoint, the cyclitol sugar alcohol is at least one selected from the group consisting of inositol, ononitol, pinitol, bonesitol, quinic acid, conduritol, and shikimic acid.

According to the preferred form of the sixth viewpoint, the cyclitol sugar alcohol is at least one selected from the group consisting of inositol, ononitol, pinitol, bonesitol, quinic acid, conduritol, and shikimic acid.

According to the preferred form of the sixth viewpoint, the hair treatment agent is at least one selected from the group consisting of a hair coloring agent, a depigmenting agent, a depigmenting agent, and a perm agent.

In the following description, POE is an abbreviation for polyoxyethylene and POP is an abbreviation for polyoxypropylene, and the number in parentheses after POE or POP represents the average number of moles of POE group or POP group added in the compound.

In the present disclosure, the "substantial amount" means an amount in which the action and effect of the addition of the compound can occur.

The hair treatment agent according to the first embodiment of the present disclosure will be described. The hair treatment agent according to the first embodiment is a treatment agent that suppresses denaturation of hair, particularly hair protein. For example, the hair treatment agent according to the first embodiment is a treatment agent applied to the hair before the treatment for denaturing the hair is applied to the hair. The hair treatment agent according to the first embodiment contains a cyclitol-based sugar alcohol. Cyclitol-based sugar alcohols can act as protein denaturation inhibitory components.

In the present disclosure, the cyclitol-based sugar alcohol refers to cyclitol and its derivative, a six-membered ring sugar alcohol. For example, the cyclitol sugar alcohol includes at least one selected from the group consisting of inositol, ononitol, pinitol, bornesitol, quinic acid, conduritol, and shikimic acid.

The cyclitol sugar alcohol is preferably 0.005% by mass or more, more preferably 0.008% by mass or more, and more preferably 0.01% by mass or more, based on the mass of the hair treatment agent. It is more preferably 0.05% by mass or more, and further preferably 0.1% by mass or more. If the amount of cyclitol-based sugar alcohol is less than 0.005% by mass, a sufficient hair denaturation inhibitory effect cannot be obtained. The cyclitol sugar alcohol is, for example, 0.5% by mass or more, 1% by mass or more, 2% by mass or more, 4% by mass or more, 6% by mass or more, or 8% by mass or more with respect to the mass of the hair treatment agent. can do. The amount of cyclitol sugar alcohol should be, for example, 20% by mass or less, 15% by mass or less, 12% by mass or less, 8% by mass or less, 5% by mass or less, or 3% by mass or less with respect to the mass of the hair treatment agent. Can be done.

The hair treatment agent according to the first embodiment may further contain a solvent. The solvent may be any solvent that can dissolve the cyclitol-based sugar alcohol. As the solvent, for example, water, ethanol or the like can be used.

The hair treatment agent of the present disclosure can appropriately contain other components such as surfactants, higher alcohols, oils, silicones, plant extracts and the like as long as the effects of the present disclosure are not impaired.

The method of using the hair treatment agent according to the first embodiment will be described. The hair treatment agent according to the first embodiment is applied to the hair at the same time as or before the treatment (for example, alkali treatment, heat treatment, etc.) for denaturing the hair, particularly the protein of the hair. For example, first, the hair treatment agent according to the first embodiment is applied to at least a hair portion to be subjected to a hair denaturation treatment. As the application method, a method such as coating or dipping can be adopted. The application time to hair is 1 minute or more, preferably 3 minutes or more. The hair treatment agent may be repeatedly applied to the hair. Next, the hair to which the hair treatment agent of the present disclosure is applied is subjected to a hair denaturation treatment. In the hair denaturation treatment, for example, a treatment agent such as a hair coloring agent (hair coloring agent, hair dyeing agent), a depigmenting agent, a depigmenting agent, a perm solution, etc. is applied to the hair, or the hair is heated. Say. Next, a treatment corresponding to the hair denaturing treatment can be performed. For example, the treated hair can be washed and dried.

According to the hair treatment agent according to the first embodiment, it is possible to prevent the hair from being damaged by the hair denaturation treatment with an alkaline agent or the like. That is, the hair treatment agent according to the first embodiment can act as a hair denaturation inhibitor.

The hair treatment agent according to the second embodiment of the present disclosure will be described. The hair treatment agent according to the second embodiment contains an alkaline agent and a cyclitol-based sugar alcohol. The hair treatment agent according to the second embodiment can be applied to a hair treatment agent usually accompanied by denaturation of hair, particularly hair protein. For example, the hair treatment agent according to the second embodiment can be applied to a hair treatment agent that requires alkaline treatment, heat treatment, or the like. The hair treatment agent according to the second embodiment can be applied to, for example, an alkali agent-containing treatment agent such as a hair coloring agent (hair coloring agent, hair dyeing agent), a decolorizing agent, a depigmenting agent, and a perm agent.

The hair treatment agent according to the second embodiment contains an alkaline agent and a cyclitol-based sugar alcohol.

The cyclitol-based sugar alcohol can be in the same form as in the first embodiment.

Examples of the alkaline agent include at least one of ammonia, monoethanolamine, triethanolamine, ammonium bicarbonate, sodium carbonate, ammonium hydrogencarbonate, arginine, sodium metasilicate, sodium silicate, sodium stearate, magnesium stearate and the like. One can be used.

The concentration of the alkaline agent is preferably 0.1% by mass or more with respect to the mass of the hair treatment agent. If the alkaline agent is less than 0.1% by mass, the cuticle cannot be opened. The concentration of the alkaline agent is, for example, 0.5% by mass or more, 1% by mass or more, 2% by mass or more, 4% by mass or more, 6% by mass or more, or 8% by mass or more with respect to the mass of the hair treatment agent. can do. The concentration of the alkaline agent can be, for example, 20% by mass or less, 15% by mass or less, 12% by mass or less, 8% by mass or less, 5% by mass or less, or 3% by mass or less.

The pH of the hair treatment agent can be, for example, 6.5 or more, 7 or more, 8 or more, or 9 or more. The pH of the hair treatment agent can be 14 or less, 13.5 or less, 13 or less, 12.5 or less, or 12 or less.

The hair treatment agent can further contain an oxidizing agent. Examples of the oxidizing agent include at least one of hydrogen peroxide, sodium perborate, urea peroxide, sodium perborate, sodium bromate, ammonium persulfate, potassium persulfate, sodium persulfate and the like. ..

The concentration of the oxidizing agent is preferably 0.1% by mass or more, more preferably 1% by mass or more, and further preferably 2% by mass or more, based on the mass of the hair treatment agent. If the amount of the oxidizing agent is less than 0.1% by mass, sufficient color development cannot be obtained in coloring, and shape immobilization becomes insufficient in perm. The concentration of the oxidizing agent can be, for example, 4% by mass or more, 6% by mass or more, or 8% by mass or more with respect to the mass of the hair treatment agent. The concentration of the oxidizing agent can be, for example, 20% by mass or less, 15% by mass or less, 12% by mass or less, 8% by mass or less, 5% by mass or less, or 3% by mass or less.

The hair treatment agent can further contain a dye. Examples of the dye include paraphenylenediamine, paratrylenediamine, N-methylparaphenylenediamine, N, N-dimethylparaphenylenediamine, N, N-dimethyl-2-methylparaphenylenediamine, N-ethyl-N-. Hydroxyethyl-para-phenylenediamine, chlorpara-phenylenediamine, N, N-bis- (2-hydroxylethyl) para-phenylenediamine, methoxypara-phenylenediamine, 2,6-dichloropara-phenylenediamine, 2-chloro-6-brom Paraphenylenediamine, 2-chloro-6-methylparaphenylenediamine, 6-methoxy-3-methylparaphenylenediamine, 2,5-diaminoanisol, N- (2-hydroxypropyl) paraphenylenediamine, N- (2-) Paradiamines such as methoxyethyl) paraphenylenediamine, 2,5-diaminopyridines, para-aminophenols, 2-methyl-4-aminophenols, 3-methyl-4-aminophenols, 2-chloro-4-aminophenols, 3 -Chloro-4-aminophenol, 2,6-dimethyl-4-aminophenol, 3,5-dimethyl-4-aminophenol, 2,3-dimethyl-4-aminophenol, 2,5-dimethyl-4-amino Para-aminophenols such as phenol, 2,4-diaminophenol, 5-aminosalicylic acid, orthoaminophenols, orthophenylenediamines, α-naphthol, orthocresol, metacresol, 2,6-dimethylphenol, 2,5- Dimethylphenol, 3,4-dimethylphenol, 3,5-dimethylphenol, benzcatechin, pyrogallol, 1,5-dihydroxynaphthalene, 1,7-dihydroxynaphthalene, 5-amino-2-methylphenol, hydroquinone, 2,4 -Diaminoanisol, metatoluylene diamine, 4-aminophenol, resorcin, resorcin monomethyl ether, metaphenylenediamine, 1-phenyl-3-methyl-5-pyrazolone, 1-phenyl-3-amino-5-pyrazolone, 1- Phenyl-3,5-dimethylpyrazolidine, 1-methyl-7-dimethylamino-4-hydroxy-2-quinolone, metaaminophenol, 4-chlororesorcin, 2-methylresorcin, 2,4-diaminophenoxyethanol, 3, , 5-Diaminotrifluoromethylbenzene, 2,4-diaminofluorobenzene, 3,5-Diaminofluorobenzene, 2,4-diamino-6-hydroxypyrimidine, 2,4,6-triaminopyrimidine, 2-amino-4,6-dihydroxypyrimidine, 4-amino-2,6-dihydroxypyrimidine , 4,6-Diamino-2-hydroxypyrimidine, 2,6-diaminopyrimidine and the like, and at least one of salts thereof and the like.

The concentration of the dye is not particularly limited as long as it is within the range used for ordinary hair dyes.

The hair treatment agent according to the second embodiment may further contain a solvent. The solvent may be any solvent that can dissolve the cyclitol sugar alcohol and the alkaline agent. When containing an oxidant and a dye, it is preferable that the solvent can dissolve the oxidant and the dye. As the solvent, for example, water, ethanol or the like can be used.

Examples of the amphoteric tenside include imidazoline-based amphoteric tenside agents (for example, 2-undecyl-N, N, N- (hydroxyethylcarboxymethyl) -2-imidazolin sodium, 2-cocoyl-2-imidazolinium hydroki. Side-1-carboxyethyroxy disodium salt, etc.); Betaine-based surfactants (eg, 2-heptadecyl-N-carboxymethyl-N-hydroxyethyl imidazolinium betaine, lauryldimethylaminoacetic acid betaine, alkyl betaine, amide betaine) , Sulfobetaine, etc.) and the like.

Examples of the cationic surfactant include quaternary ammonium salts such as cetyltrimethylammonium chloride, stearyltrimethylammonium chloride, behenyltrimethylammonium chloride, behenyldimethylhydroxyethylammonium chloride, stearyldimethylbenzylammonium chloride, and cetiltriethylammonium methylsulfate. Can be mentioned. In addition, diethylaminoethyl amide stearate, dimethylaminoethyl amide stearate, diethyl amino ethyl amide palmitate, dimethyl amino ethyl amide palmitate, diethyl amino ethyl amide myristate, dimethyl amino ethyl amide myrista, diethyl amino ethyl amide behenic acid, dimethyl behenate. Aminoethylamide, diethylaminopropylamide stearate, dimethylaminopropylamide stearate, diethylaminopropylamide palmitate, dimethylaminopropylamide palmitate, diethylaminopropylamide myristanoide, dimethylaminopropylamide myristinate, diethylaminopropylamide behenic acid, behenin Examples thereof include amide amine compounds such as acid dimethylaminopropylamide.

Examples of the anionic surfactant include fatty acid soap (for example, sodium laurate, sodium palmitate, etc.), higher alkyl sulfate ester salt (for example, sodium lauryl sulfate, potassium lauryl sulfate, etc.), and alkyl ether sulfate ester salt (for example, sodium lauryl sulfate). , POE-sodium lauryl sulfate triethanolamine, POE-sodium lauryl sulfate, etc.), N-acylsarcosic acid (eg, sodium lauroyl sarcosin, etc.), higher fatty acid amide sulfonate (eg, N-myristoyl-N-methyltaurine sodium, etc.), Palm oil fatty acid methyl taurine sodium, lauryl methyl taurine sodium, etc.), phosphate ester salts (POE-oleyl ether phosphate sodium, POE-stearyl ether phosphoric acid, etc.), sulfosuccinates (eg, di-2-ethylhexyl sulfosuccinate sodium) , Monolauroyl monoethanolamide polyoxyethylene sulfosuccinate sodium, lauryl polypropylene glycol sulfosuccinate sodium, etc.), Alkylbenzene sulfonate (for example, sodium linadodecylbenzene sulfonate, linadodecylbenzene sulfonate triethanolamine, linadodecylbenzene sulfonic acid) Etc.), higher fatty acid ester sulfate ester salts (eg, hardened coconut oil fatty acid sodium glycerin sulfate, etc.), N-acylglutamate (eg, monosodium N-lauroyl glutamate, disodium N-stearoyl glutamate, N-myristoyl-L- (Mosodium glutamate, etc.), sulfated oil (eg, funnel oil, etc.), POE-alkyl ether carboxylic acid, POE-alkylallyl ether sulfonate, α-olefin sulfonate, higher fatty acid ester sulfonate, secondary alcohol Examples thereof include sulfate ester salt, higher fatty acid alkylolamide sulfate ester salt, sodium lauroyl monoethanolamide succinate, ditriethanolamine N-palmitoyl aspartate, and sodium caseinate.

The surfactant can be, for example, 1% by mass to 3% by mass with respect to the mass of the hair treatment agent.

In the second embodiment, the alkaline agent, oxidizing agent and dye may include those after the reaction. For example, the oxidizing agent may include those decomposed by an alkaline agent. Dyes may also include those developed by an oxidizing agent. When the hair treatment agent according to the second embodiment cannot be directly specified by the composition or the like, the hair treatment agent can be specified by the production method thereof.

The method of using the hair treatment agent according to the second embodiment will be described. The hair treatment agent according to the second embodiment can be used according to the prescription of the target treatment. For example, when the hair treatment agent is a hair coloring agent, coloring can be performed according to the usual formulation of the hair coloring agent. When the hair treatment agent is a perm agent, the perm can be applied according to the usual prescription of the perm agent.

According to the hair treatment agent according to the second embodiment, even if the hair is subjected to a treatment such as an alkaline agent treatment that normally denatures the hair, the hair is prevented from being denatured and damaged. be able to. According to the hair treatment agent according to the second embodiment, no special work is required, and it is possible to prevent the hair from being denatured in the usual usage form of the hair treatment agent.

The hair treatment agent according to the third embodiment of the present disclosure will be described. The hair treatment agent according to the third embodiment can be applied to a hair treatment agent usually accompanied by denaturation of hair, particularly hair protein. For example, the hair treatment agent according to the third embodiment can be applied to a hair treatment agent that requires alkaline treatment, heat treatment, or the like. The hair treatment agent according to the third embodiment can be applied to, for example, an alkali agent-containing treatment agent such as a hair coloring agent, a decolorizing agent, a depigmenting agent, and a perm agent.

The hair treatment agent according to the third embodiment includes a first treatment agent containing an alkaline agent and a second treatment agent containing an oxidizing agent.

At least one of the first treatment agent and the second treatment agent contains a cyclitol-based sugar alcohol. The cyclitol sugar alcohol is preferably contained in the first treatment agent.

The first treatment agent can further contain, for example, a solvent, a dye, a cationic surfactant, a nonionic surfactant, a higher alcohol, a reducing agent, and the like.

The second treatment agent can further contain, for example, a solvent, a cationic surfactant, a nonionic surfactant, a higher alcohol and the like.

In the case of the first aspect in which the hair treatment agent according to the third embodiment is a hair coloring agent, a decolorizing agent, and a depigmenting agent, the first treating agent can contain, for example, a solvent and an alkaline agent. The first treatment agent can further contain a dye. The second treatment agent can include, for example, a solvent and an oxidizing agent. The cyclitol sugar alcohol can be blended in at least one of the first treatment agent and the second treatment agent. In the first aspect, the first treatment agent and the second treatment agent can be mixed and used.

In the first aspect, the first treatment agent and / or the second treatment agent has a form in which a mixture of the first treatment agent and the second treatment agent has the same form as the hair treatment agent according to the second embodiment. As such, it can contain cyclitol sugar alcohols.

In the first aspect, it is preferable that the first treatment agent contains an alkaline agent such that the pH of the mixture of the first treatment agent and the second treatment agent is 9 to 13.

In the first aspect, the second treatment agent can contain an oxidizing agent in the same form as the hair treatment agent according to the second embodiment.

The hair treatment agent according to the third embodiment may also contain a mixture of the first treatment agent and the second treatment agent. Further, in the third embodiment, the alkaline agent, the oxidizing agent and the dye may include those after the reaction. For example, the oxidizing agent may include those decomposed by an alkaline agent. Dyes may also include those developed by an oxidizing agent. When the hair treatment agent according to the third embodiment cannot be directly specified by the composition or the like, the hair treatment agent can be specified by the production method thereof.

The mixture of the first treatment agent and the second treatment agent can have the same form as the hair treatment agent according to the second embodiment. Regarding the form of the mixture, the description of the hair treatment agent according to the second embodiment is incorporated.

In the second aspect in which the hair treatment agent according to the third embodiment is a perm agent, the first treatment agent can contain, for example, a solvent, an alkaline agent, and a reducing agent. The second treatment agent can include, for example, a solvent and an oxidizing agent. The cyclitol sugar alcohol is added to the first treatment agent. In the second aspect, the first treatment agent and the second treatment agent can be applied to the hair separately.

Examples of the reducing agent include thioglycolic acid, thiolactic acid, thioglycerin, cysteine, butyrolactone thiol, cysteamine, acetylcysteine, glycerin monothioglycolate, sodium sulfite and the like.

In the second aspect, the cyclitol sugar alcohol is preferably 0.005% by mass or more, more preferably 0.008% by mass or more, and 0.01% by mass, based on the mass of the first treatment agent. % Or more is more preferable, 0.05% by mass or more is more preferable, and 0.1% by mass or more is further preferable. If the amount of cyclitol-based sugar alcohol is less than 0.005% by mass, a sufficient hair denaturation inhibitory effect cannot be obtained. The cyclitol sugar alcohol is, for example, 0.5% by mass or more, 1% by mass or more, 2% by mass or more, 4% by mass or more, 6% by mass or more, or 8% by mass with respect to the mass of the first treatment agent. It can be the above. The amount of cyclitol sugar alcohol should be, for example, 20% by mass or less, 15% by mass or less, 12% by mass or less, 8% by mass or less, 5% by mass or less, or 3% by mass or less with respect to the mass of the hair treatment agent. Can be done.

In the second aspect, the concentration of the alkaline agent is preferably 0.1% by mass or more with respect to the mass of the first treatment agent. If the alkaline agent is less than 0.1% by mass, the cuticle cannot be opened. The concentration of the alkaline agent is, for example, 0.5% by mass or more, 1% by mass or more, 2% by mass or more, 4% by mass or more, 6% by mass or more, or 8% by mass with respect to the mass of the first treatment agent. It can be the above. The concentration of the alkaline agent can be, for example, 20% by mass or less, 15% by mass or less, 12% by mass or less, 8% by mass or less, 5% by mass or less, or 3% by mass or less.

In the second aspect, the pH of the first treatment agent can be, for example, 6.5 or higher, 7 or higher, 8 or higher, or 9 or higher. The pH of the first treatment agent can be 14 or less, 13.5 or less, 13 or less, 12.5 or less, or 12 or less.

When the first treatment agent and / or the second treatment agent is in the cream form, the first treatment agent and / or the second treatment agent is a cationic surfactant, a nonionic surfactant, and a higher grade. Alcohol can be further included.

For cyclitol sugar alcohols, alkaline agents, oxidizing agents, solvents, and dyes, the description of the above embodiment can be incorporated.

The first treatment agent and the second treatment agent in the hair treatment agent of the present disclosure appropriately contain other components such as higher alcohols, oils, silicones, plant extracts and the like as long as the effects of the present disclosure are not impaired. Can be contained.

The method of using the hair treatment agent according to the third embodiment will be described. The hair treatment agent according to the third embodiment can be used according to the usual formulation of a hair treatment agent such as a hair coloring agent, a depigmenting agent, a depigmenting agent, and a perm agent. For example, in the case of the first aspect in which the hair treatment agent according to the third embodiment is a hair coloring agent, a decoloring agent, and a depigmenting agent, the method of using the hair treatment agent is the first treatment agent and the second treatment agent. A step of mixing the treatment agents to prepare a mixture and a step of applying the mixture to the hair can be included. When the hair treatment agent according to the third embodiment is a perm agent in the second aspect, the method of using the hair treatment agent is a step of applying the first treatment agent to the hair and applying the first treatment agent. A step of applying a second treatment agent to the hair that has been treated can be included. The method of using the hair treatment agent can further include a step of imparting a shape to the hair, a step of applying heat to the hair, a step of washing the hair, a step of drying the hair, and the like.

According to the hair treatment agent according to the third embodiment, it is possible to prevent the hair from being denatured by the alkaline agent. According to the hair treatment agent according to the third embodiment, no special work is required, and it is possible to prevent the hair from being denatured in the usual usage form of the hair treatment agent.

The hair treatment agent according to the fourth embodiment of the present disclosure will be described. The hair treatment agent according to the fourth embodiment can be applied to the same hair treatment agent as the third embodiment.

The hair treatment agent according to the fourth embodiment includes a first treatment agent containing an alkaline agent, a second treatment agent containing an oxidizing agent, and a third treatment agent containing a cyclitol-based sugar alcohol.

The third treatment agent can be the cyclitol sugar alcohol itself. The third treatment agent can also be a cyclitol-based sugar alcohol solution. When the third treatment agent is cyclitol-based sugar alcohol itself, it can be used by dissolving it in a solvent such as water. The first treatment agent and the second treatment agent can have the same form as that of the third embodiment except that they do not contain a cyclitol-based sugar alcohol.

The method of using the hair treatment agent according to the fourth embodiment will be described. The method of use in the fourth embodiment is divided into a mode in which the third treatment agent is mixed with the first treatment agent and a mode in which the third treatment agent is applied before the first treatment agent. be able to.

In the first aspect, the method of using the hair treatment agent is the same as the method of use according to the third embodiment, except that the method of using the hair treatment agent includes a step of mixing the third treatment agent and at least the first treatment agent. Can be done.

In the second aspect, the method of using the hair treatment agent includes a step of applying the third treatment agent to the hair and a step of applying the first treatment agent to the hair to which the third treatment agent is applied. Can include. The step of applying the third treatment agent to the hair can be the same as the method of using the hair treatment agent according to the first embodiment. Except for the step of applying the third treatment agent in advance, the same method as that of the third embodiment can be used.

According to the hair treatment agent according to the fourth embodiment, it is possible to prevent the hair from being denatured by the alkaline agent.

The additive according to the fifth embodiment of the present disclosure will be described. The additive according to the fifth embodiment is an additive for adding to a hair treatment agent such as a hair coloring agent, a depigmenting agent, a depigmenting agent, and a perm agent. Additives include cyclitol sugar alcohols. The additive may be a cyclitol-based sugar alcohol itself or a cyclitol-based sugar alcohol solution.

The method of using the additive includes a step of mixing with a hair treatment agent such as a hair coloring agent to prepare a mixture, and a step of applying the mixture to hair. When the hair treatment agent is divided into a plurality of treatment agents such as a hair coloring agent and a perm agent, the additive is preferably mixed with the treatment agent containing an alkaline agent. In other cases, the hair treatment can be performed according to the prescription of the hair treatment agent.

By using the additive according to the fifth embodiment, it is possible to suppress hair denaturation caused by a hair treatment agent such as a hair coloring agent.

The method for producing the hair treatment agent according to each of the above embodiments will be described. The hair treatment agent is not limited to a specific production method, and can be produced by using a known method. For example, the hair treatment agent of the present disclosure can be produced by mixing each of the above components.

It may be difficult or almost impractical for the hair treatment agent of the present disclosure to be directly specified by the composition or the like. In such a case, the hair treatment agent of the present disclosure should be allowed to be specified by the manufacturing method thereof.

The hair treatment method according to the sixth embodiment will be described. The hair treatment method according to the sixth embodiment includes a first treatment step of treating the hair with at least one of an alkaline agent and heat, and a second treatment step of treating the hair with a cyclitol-based sugar alcohol. Including.

The treatment in the first treatment step refers to a treatment in which hair (particularly hair protein) is denatured by an alkaline agent or heat. The treatment in the first treatment step refers to, for example, a treatment in which an alkaline agent and / or heat is applied to the hair. As the first treatment step, for example, a step of coloring the hair (hair dyeing treatment), a step of decolorizing the hair, a step of decontaminating the dye from the hair, a step of applying a perm to the hair, and a straight perm to the hair. Examples include a process of applying hair and a process of straightening curly hair.

The order of the first processing step and the second processing step may be any. The first treatment step may be before the second treatment step. The first treatment step may be after the second treatment step. The first processing step and the second processing step may be performed at the same time. From the viewpoint of the effect of suppressing hair denaturation, it is preferable that the first treatment step is after the second treatment step or at the same time as the second treatment step.

The second processing step when the second processing step is before the first processing step will be described. In the second treatment step, a cyclitol-based sugar alcohol solution in which a cyclitol-based sugar alcohol is dissolved can be applied to at least the hair portion to be subjected to the first treatment step. Any method of applying the cyclitol solution to hair may be used. For example, a cyclitol-based sugar alcohol solution may be applied to the hair, or the hair may be immersed in the cyclitol solution. The cyclitol solution can be, for example, the hair treatment agent according to the first embodiment.

The second processing step when the second processing step is simultaneous with the first processing step will be described. A treatment agent in which a cyclitol-based sugar alcohol is dissolved in the treatment agent used in the first treatment step can be used. This treatment agent can be, for example, any of the hair treatment agents according to the second to fourth embodiments.

The second processing step when the second processing step is later than the first processing step will be described. In the second treatment step, a cyclitol-based sugar alcohol solution in which a cyclitol-based sugar alcohol is dissolved can be applied to the hair portion that has undergone at least the first treatment step. Any method of applying the cyclitol solution to hair may be used. For example, a cyclitol-based sugar alcohol solution may be applied to the hair, or the hair may be immersed in the cyclitol-based sugar alcohol solution. The cyclitol-based sugar alcohol solution can be, for example, the hair treatment agent according to the first embodiment.

According to the hair treatment method according to the sixth embodiment, it is possible to prevent the hair from being denatured by an alkaline agent or heat.

The hair treatment agent and additive of the present disclosure do not have to contain a cellulose derivative. The concentration of the cellulose derivative is, for example, less than 1% by mass, less than 0.5% by mass, less than 0.1% by mass, less than 0.05% by mass, or 0 with respect to the mass of the hair treatment agent and / or the additive. It can be less than 0.01% by mass. The cellulose derivative may be 0% by mass. Examples of the cellulose derivative include cationized cellulose, hydroxyethyl cellulose, hydroxypropylmethyl cellulose, carboxymethyl cellulose salt and the like.

The hair treatment agent of the present disclosure will be described below with an example. However, the hair treatment agent of the present disclosure is not limited to the following examples.

[Test Examples 1 to 4]
The effect of cyclitol sugar alcohol on suppressing hair denaturation was tested. In Test Examples 1 to 4, the hair of the same person was used. Inositol was used as the cyclitol sugar alcohol. In Test Example 1, the tensile strength of the untreated hair was measured. The hair tested in Test Example 2 is hair that has been treated with inositol and then treated with alkali. The inositol treatment is a treatment in which hair is immersed in an inositol aqueous solution in which 5% by mass of inositol is dissolved for 5 minutes. The alkaline treatment is a treatment in which the hair is immersed in an aqueous ammonia solution adjusted to pH 11.5 at room temperature for 24 hours. In Test Example 3, the hair was immersed in an aqueous solution prepared by dissolving 5% by mass of inositol in an aqueous ammonia solution adjusted to pH 11.5 at room temperature for 24 hours. In Test Example 4, only the alkali treatment was performed in the same manner as in Test Example 2. Hair was washed with water and air-dried before strength measurement.

The tensile strength of the hair of each test example was measured. The tensile strength of the hair was measured at 20 ° C. in water using a single fiber tensile tester (manufactured by ORIENTEC). Each hair sample was set to an initial length of 20 mm, stretched at an elongation rate of 5 mm / min, and the stress value was measured. ^{A strong elongation curve was created using the stress F (N / m 2} ) per hair cross-sectional area with respect to the elongation rate λ (%), and the stress at an elongation rate of 20% was defined as the stress at 20% elongation. The cross-sectional area of the hair sample was calculated from the average value of the hair diameters measured at 60% RH and 20 ° C. using a hair diameter diameter measuring system LS-7000 (manufactured by Keyence). Table 1 shows the stress at 20% elongation of each test example. The stress values shown in Table 1 are average values calculated from eight measurements. Table 1 also shows the rate of decrease of the stress values of Test Examples 2 to 4 with respect to Test Example 1. FIG. 1 shows a graph comparing the 20% elongation stress shown in Table 1.

Further, the hair of each Test Example 2-4, differential scanning calorimetry (DSC: Differential scanning calorimetry) was carried out to determine the peak temperature of the endothermic peak in the thermogram (T _D). Furthermore, the specific enthalpy (ΔH) was determined from the peak area of the endothermic peak in the thermograph. Table 1 also shows the _{T D} and [Delta] H. Figure 2 shows a graph comparing T _D shown in Table 1. FIG. 3 shows a graph comparing ΔH shown in Table 1.

Comparing Test Example 1 and Test Example 4-1, the stress value of the hair was reduced by 10% or more by the alkaline treatment. It is considered that this is because the protein in the hair was denatured by the alkaline treatment. As for the T _D and [Delta] H, the hair in Test Example 4-1 were significantly reduced than in Test Example 1. T _D is to be the hair depends on the crosslinking density of the matrix proteins. Therefore, it is considered that the hair of Test Example 4-1 has a larger denatured matrix protein than the hair of Test Example 1. Also, ΔH depends on the amount and integrity of microfibrils, which are crystalline regions within the hair. Therefore, it is considered that the hair of Test Example 4-1 has a larger degeneration of microfibrils than the hair of Test Example 1.

On the other hand, the stress value of the hair of Test Example 2-1 pretreated with cyclitol sugar alcohol before the alkaline treatment did not decrease as much as that of Test Example 4-1. For even T _D and [Delta] H, towards the test example 2-1 was smaller reduction ratio Test Example 1 than Test Example 4-1. Therefore, it is considered that the hair of Test Example 2-1 has a smaller degree of protein denaturation than that of Test Example 4-1.

As for the stress value of the hair of Test Example 3-1 in which the alkali treatment and the cyclitol treatment were simultaneously performed, a decrease in the stress value was not observed as in Test Example 4-1. For even T _D and [Delta] H, towards the test example 3-1 was smaller reduction ratio Test Example 1 than Test Example 4-1. Therefore, it is considered that the hair of Test Example 3-1 has a smaller degree of protein denaturation than that of Test Example 4-1.

From the above, it is considered that the protein denaturation in the hair due to the alkaline agent could be suppressed by applying the cyclitol sugar alcohol to the hair before the alkaline treatment and by applying the cyclitol at the same time as the alkaline treatment.

Next, the hair treated in Test Examples 2-1 to 4-1 was shampooed and air-dried, and then the 20% elongation stress was measured in the same manner as in Test Examples 2-1 to 4-1. The shampoo treatment was carried out by immersing in a 10% by mass polyoxyethylene lauryl ether sodium sulfate aqueous solution at 40 ° C. for 30 minutes. Table 2 shows the stress at 20% elongation of each test example. The stress values shown in Table 2 are average values calculated from eight measurements. Table 2 also shows the rate of decrease of the stress values of Test Examples 2 to 4 with respect to Test Example 1. FIG. 4 shows a graph comparing the 20% elongation stress before and after cleaning shown in Tables 1 and 2.

There was no significant change in hair strength even with shampoo treatment. Even if cyclitol-based sugar alcohols remained in the hair in Test Examples 2-1 and 3-1, it is considered that the residual cyclitol-based sugar alcohols were removed by the shampoo treatment of Test Examples 2-2 and 3-2. Be done. Since there was no significant change in the strength relationship between Test Examples 2-1 to 4-1 and Test Examples 2-2-4-2, the decrease in hair strength was suppressed in Test Examples 2-2 and 3-2. It was not because the cyclitol sugar alcohol itself that was present in the hair increased the strength of the hair or repaired the hair, but because the cyclitol sugar alcohol suppressed the degeneration of the hair due to the alkaline treatment. Is considered to be. From this, it was found that cyclitol-based sugar alcohols are effective in suppressing protein denaturation caused by alkaline agents.

[Test Examples 5 to 6]
A hair dyeing test was conducted using a hair coloring agent containing a cyclitol sugar alcohol. Inositol was used as the cyclitol sugar alcohol. In Test Examples 5 and 6, the same person's hair was used. In Test Example 5, inositol was added to the hair coloring agent. In Test Example 6, inositol was not added to the hair coloring agent. The hair coloring agents used in Test Examples 5 and 6 are the same except for the presence or absence of inositol. The hair coloring agent used in Test Examples 5 and 6 contained a total of 4.5% by mass of ammonia and ammonium bicarbonate as an alkaline agent, and a first agent having a pH of 10 and 6% by mass of hydrogen peroxide were blended. It is a mixture of the second agent and. The first agent of Test Example 5 contains 0.02% by mass of inositol, and the hair coloring agent, which is a mixture of the first agent and the second agent, contains 0.01% by mass of inositol. The hair coloring agent thus prepared was applied to the hair, left for 30 minutes, washed with shampoo, and dried. This bleaching process was repeated 5 times. The hair coloring agent was washed and air-dried. For the hair of each test example, the stress at 20% elongation was measured in the same manner as in test examples 1 to 4. Table 3 shows the stress at 20% elongation of each test example. The stress values shown in Table 3 are average values calculated from 10 measurements. FIG. 5 shows a graph comparing the 20% elongation stress shown in Table 3.

Despite the same bleaching treatment, the bleached hair of Test Example 5 had higher strength. From this, as shown in Test Examples 2 and 3, it was possible to suppress the protein denaturation of hair and the decrease in strength by blending the cyclitol-based sugar alcohol. From this, it was found that even if a cyclitol-based sugar alcohol is added to a hair coloring agent containing an oxidizing agent and a dye, denaturation of hair can be suppressed.

In the hair treatment agent, if the cyclitol sugar alcohol is 0.005% by mass or more, it is considered that the denaturation suppressing effect can be exhibited.

[Test Examples 7-9]
We tested whether cyclitol sugar alcohols affect hair coloring. In Test Examples 7 and 8, gray hair was dyed with a normal oxidative hair dye, and the color space of the hair before and after hair dyeing was measured using a spectrocolorimeter (CM-3600d manufactured by Konica Minolta). The measurement was performed to determine the color difference ΔE ^* ab between the hair before dyeing and the hair after dyeing. In Test Example 7, a hair coloring agent to which inositol was added so as to be 10% by mass was used. In Test Example 9, the color space of gray hair before dyeing was measured. The hairs of Test Examples 7 to 9 are of the same person. Table 4 shows the color space and the color difference.

The color difference between Test Examples 7 and 8 was almost the same. Actually, the hairs of Test Example 7 and Test Example 8 were visually compared, but the difference in color could not be recognized. From this, it was found that the addition of cyclitol to the hair coloring agent did not affect the dyeing effect.

[Test Examples 10 to 14]
The correlation between the concentration of cyclitol sugar alcohol in the hair treatment agent and the hair strength after treatment was investigated. In Test Examples 10 to 14, the hair of the same person was used. Inositol was used as the cyclitol sugar alcohol. The hair dyeing test was carried out in the same manner as in Test Examples 5 and 6 except for the concentration of inositol in the hair treatment agent. Table 5 shows the stress at 20% elongation of each test example. The method for measuring the stress during 20% elongation is the same as in Test Examples 1 to 4. The stress values shown in Table 5 are average values calculated from four measurements. FIG. 6 shows a graph comparing the 20% elongation stress shown in Table 5.

The hair treatment agent containing 0.02% by mass of cyclitol-based sugar alcohol was able to suppress the decrease in hair strength as compared with Test Example 14 containing no cyclitol-based sugar alcohol. From this, it is considered that the content of inositol is preferably 0.01% by mass or more, and more preferably 1% by mass or more. In addition, as the content of the cyclitol sugar alcohol increased, the decrease in hair strength decreased. From this, it is considered that the concentration of the cyclitol-based sugar alcohol is preferably high, and the solubility of the cyclitol-based sugar alcohol can be added to the hair treatment agent.

The hair treatment agent, additive and hair treatment method of the present invention are described based on the above-mentioned embodiments and examples, but the present invention is not limited to the above-mentioned embodiments and examples, and within the scope of the present invention. Moreover, based on the basic technical idea of the present invention, various modifications, modifications and improvements can be included for each disclosed element (including the elements described in the claims, the specification and the drawings). Further, within the scope of the claims of the present invention, various combinations, substitutions or selections of each disclosed element are possible.

Further issues, objectives and forms (including modified forms) of the present invention will also be clarified from all disclosures of the present invention including the scope of claims.

The numerical range described in this document should be construed as any numerical value or range included in the range specifically described in this document, even if otherwise stated.

A part or all of the above-described embodiment may be described as in the following appendix, but is not limited to the following description. Each appendix can also be combined with each claim described in the claims.
[Appendix 1]
How to use cyclitol sugar alcohol as a protein protectant.
[Appendix 2]
A method of using a cyclitol sugar alcohol as an inhibitor of protein denaturation due to heat.
[Appendix 3]
A method of using a cyclitol sugar alcohol as an inhibitor of protein denaturation caused by an alkaline drug.
[Appendix 4]
A method of protecting hair, which comprises the step of applying a hair treatment agent containing a cyclitol sugar alcohol to the hair.
[Appendix 5]
Hair coloring agent containing cyclitol sugar alcohol.
[Appendix 6]
Perm solution containing cyclitol sugar alcohol.
[Appendix 7]
A hair coloring method comprising applying a hair coloring agent containing a cyclitol sugar alcohol to hair.
[Appendix 8]
Perm method including a step of applying a perm solution containing a cyclitol sugar alcohol to hair to apply a perm [Appendix 9]
The process of adding cyclitol sugar alcohol to the hair treatment agent,
A method for treating hair, which comprises a step of applying the hair treatment agent to hair.
[Appendix 10]
Additives for hair coloring agents, including cyclitol sugar alcohols.
[Appendix 11]
Additives for perms, including cyclitol sugar alcohols.

The hair treatment agent and its usage method, additives, and hair treatment method of the present disclosure can be applied to, for example, cosmetics, cleaning agents, etc. applied to hair. For example, the hair treatment agent of the present disclosure can also be applied to shampoos, conditioners, hair growth agents, hair thickeners, antiperspirants, fragrances and the like.

Claims

A hair treatment agent that suppresses hair denaturation
Hair treatment agent containing cyclitol sugar alcohol.
The hair treatment agent according to claim 1, for suppressing hair denaturation due to at least one of an alkaline agent and heat.
With 0.1% by mass or more of alkaline agent,
Hair treatment agent containing cyclitol sugar alcohol.
The hair treatment agent according to claim 3, further comprising an oxidizing agent.
The hair treatment agent according to any one of claims 1 to 4, which is a solution containing 0.005% by mass to 20% by mass of the cyclitol sugar alcohol with respect to the mass of the hair treatment agent.
A hair treatment agent having a first treatment agent and a second treatment agent.
The first treatment agent contains an alkaline agent and contains
The second treatment agent contains an oxidizing agent and contains
A hair treatment agent containing at least one of the first treatment agent and the second treatment agent containing a cyclitol-based sugar alcohol.
The hair treatment agent according to claim 6, which is a mixture of the first treatment agent and the second treatment agent.
The hair treatment agent according to claim 7, wherein the mixture contains 0.005% by mass or more of the cyclitol-based sugar alcohol with respect to the mass of the mixture.
The hair treatment agent according to claim 7 or 8, wherein the pH of the mixture is 9 to 13.
The hair treatment agent according to claim 6, wherein the second treatment agent is applied to a portion to which the first treatment agent is applied after the first treatment agent is applied to the hair.
The hair treatment agent according to claim 10, wherein the first treatment agent contains 0.01% by mass or more of the cyclitol-based sugar alcohol with respect to the mass of the first treatment agent.
The hair treatment agent according to claim 11, wherein the pH of the first treatment agent is 8 to 13.
A hair treatment agent having a first treatment agent, a second treatment agent, and a third treatment agent.
The first treatment agent contains an alkaline agent and contains
The second treatment agent contains an oxidizing agent and contains
A hair treatment agent, wherein the third treatment agent contains a cyclitol-based sugar alcohol.
The hair treatment agent according to claim 13, which is a mixture of the first treatment agent, the second treatment agent, and the third treatment agent.
The hair treatment agent according to claim 14, wherein the mixture contains 0.005% by mass or more of the cyclitol-based sugar alcohol with respect to the mass of the mixture.
The hair treatment agent according to claim 14 or 15, wherein the pH of the mixture is 9 to 13.
The hair treatment agent according to claim 13, wherein the second treatment agent is applied to a portion to which the first treatment agent is applied after the first treatment agent is applied to the hair.
The hair treatment agent according to claim 17, wherein the pH of the first treatment agent is 8 to 13.
The third treatment agent is used in combination with the first treatment agent.
The hair treatment agent according to claim 17 or 18, wherein the mixture of the first treatment agent and the third treatment agent contains 0.005% by mass or more of the cyclitol-based sugar alcohol with respect to the mass of the mixture.
The third treatment agent is a treatment agent applied to the hair before applying the first treatment agent.
The hair treatment agent according to claim 17 or 18, wherein the third treatment agent is a solution containing 0.005% by mass or more of the cyclitol sugar alcohol.
The hair according to any one of claims 6 to 20, wherein the cyclitol sugar alcohol is at least one selected from the group consisting of inositol, ononitol, pinitol, bornesitol, quinic acid, conduritol, and shikimic acid. Processing agent.
The first treatment step of treating the hair with at least one of an alkaline agent and heat, and
A method for treating hair, which comprises a second treatment step of treating the hair with a cyclitol sugar alcohol.
The method according to claim 22, wherein the second treatment step is performed, and the first treatment step is performed on the hair portion to which the second treatment step is applied.
The method according to claim 22, wherein the first processing step and the second processing step are performed at the same time.
The method according to any one of claims 22 to 24, wherein in the second treatment step, a solution containing 0.005% by mass to 20% by mass of the cyclitol sugar alcohol is applied to the hair.
The method according to any one of claims 22 to 25, wherein the cyclitol sugar alcohol is at least one selected from the group consisting of inositol, ononitol, pinitol, bornesitol, quinic acid, conduritol, and shikimic acid. ..
An additive added to hair treatment agents
Additives containing cyclitol sugar alcohols.
The additive according to claim 27, wherein the cyclitol sugar alcohol is at least one selected from the group consisting of inositol, ononitol, pinitol, bornesitol, quinic acid, conduritol, and shikimic acid.
The additive according to claim 27 or 28, wherein the hair treatment agent is at least one selected from the group consisting of a hair coloring agent, a depigmenting agent, a depigmenting agent, and a perm agent.