JP6929621B2 - Second agent for hair deformation, hair deformation agent and hair deformation method - Google Patents

Description

The present invention relates to a second agent for hair deformation, a hair deformation agent, and a hair deformation method for deforming the hair shape.

Permanent wave treatment and straightening treatment are widely known as methods for deforming hair shape. In these treatments, the hair shape is deformed by using the first agent for hair deformation containing a reducing agent and the second agent for hair deformation containing an oxidizing agent. As a mechanism for deforming the hair shape, the hair is deformed into a desired shape by breaking the cystine bond of the hair in the reduction reaction using the first agent for hair deformation, and then the oxidation reaction using the second agent for hair deformation. By forming a disulfide bond of the keratin fiber of the hair in the hair, the hair is fixed in a desired hair shape.

In order to enhance the hair shape deforming effect, it is known to adjust the pH of the first hair deforming agent to be alkaline for the purpose of promoting the above-mentioned reduction reaction (see, for example, Patent Document 1). However, if it is made alkaline, hair damage is likely to occur due to the increase in the reducing power of the reducing agent. On the other hand, if the pH of the first agent for hair deformation is 7.0 or less, hair damage is suppressed, but it is considered that a higher hair changing effect than that of alkaline is not obtained.

Japanese Unexamined Patent Publication No. 2005-330267

On the other hand, as a result of the examination, the inventor made a strong acid even when the hair damage was suppressed by lowering the pH of the first agent for hair deformation containing a reducing agent to 7.0 or less. It has been found that a good hair deformation effect can be obtained by further blending a positive salt of a strong base with a strong base in the first agent for hair deformation.

In this way, by blending a positive salt of a strong acid and a strong base while keeping the pH of the first agent for hair deformation at 7.0 or less, a good hair deformation effect can be obtained while suppressing hair damage. Not limited to this, it may be further desired that the hair is smooth when the hair deformation treatment is completed by using the hair deformation second agent after the hair deformation first agent.

The present invention includes a second agent for hair deformation that can smooth the hair when used after the first agent for hair deformation having a pH of 7.0 or less, which is excellent in the hair deformation effect, and the second agent for hair deformation. It is an object of the present invention to provide a hair deformation agent and a hair deformation method provided with the agent.

As a result of the study of the hair deformation treatment by the present inventor, an oxidizing agent used after the first agent for hair deformation, which contains a positive salt of a strong acid and a strong base and a reducing agent and has a pH of 7.0 or less, is found. One or more selected from a cationic polymer, an amphoteric polymer containing a structural unit derived from an anionic monomer and a structural unit derived from a cationic monomer, and dimethylpolysiloxane in the compounded second agent for hair deformation. It was found that the smoothness of the hair after the hair deformation treatment can be improved by further blending.

The second agent for hair deformation of (1) is a second agent for hair deformation used after the first agent for hair deformation, and the first agent for hair deformation is a normal salt and a reduction of a strong acid and a strong base. The agent is blended, the pH is 7.0 or less, and the second agent for hair deformation includes a cationic polymer, an amphoteric polymer containing a structural unit derived from an anionic monomer and a structural unit derived from a cationic monomer. It is characterized in that one or more selected from dimethylpolysiloxane and an oxidizing agent are blended.

The second agent for hair deformation of (2) is the second agent for hair deformation of (1), and is amphoteric containing a cationic polymer and a structural unit derived from an anionic monomer and a structural unit derived from a cationic monomer. The blending amount of one or more selected from the polymer and dimethylpolysiloxane is 0.01% by mass or more and 5% by mass or less.

The second agent for hair deformation of (3) is the second agent for hair deformation of (1) or (2), and the second agent for hair deformation has a structure derived from a cationic polysaccharide or a cationic monomer. A cationic polymer containing a unit is blended.

The second agent for hair deformation of (4) is the second agent for hair deformation according to any one of (1) to (3), and is a combination of a strong acid and a strong base blended in the first agent for hair deformation. The positive salt is an alkali metal salt and / or an alkaline earth metal salt. If the positive salt of the strong acid and the strong base in the first agent for hair deformation is an alkali metal salt and / or an alkaline earth metal salt, a high hair deformation effect can be obtained.

The second agent for hair deformation of (5) is the second agent for hair deformation of (4), and a chelating agent is blended with the second agent for hair deformation. Here, the hair is treated with the first agent for hair deformation containing an alkali metal salt or an alkaline earth metal salt, and then the hair is treated with the second agent for hair deformation containing an oxidizing agent. However, since the second agent for hair deformation contains a chelating agent, it is possible to suppress the reaction in which the metal derived from the hair acts as a catalyst to decompose the oxidizing agent. In addition, this second agent for hair deformation, which contains a chelating agent, makes it possible to enhance the storage stability of the oxidizing agent.

The hair deforming agent (6) is a first agent for hair deforming having a pH of 7.0 or less, which is a mixture of a positive salt of a strong acid and a strong base and a reducing agent, and any of (1) to (5). It is provided with one second agent for hair deformation.

The hair deformation method of (7) is characterized by using the hair deformation agent of (6).

Any of the second agent for hair deformation, the hair deformation agent, and the hair deformation method according to the present invention can obtain a hair deformation effect while suppressing hair damage, and further smooth the hair after the hair deformation treatment. Will be possible.

Photographs of hair bundles after permanent wave treatment using the first agent for hair deformation (Reference Examples 1a to 1g). Photographs of hair bundles after permanent wave treatment using the first agent for hair deformation (Reference Examples 2a and 2b). Photographs of hair bundles after permanent wave treatment using the first agent for hair deformation (Reference Examples 3a and 3b). Photographs of hair bundles after permanent wave treatment using the first agent for hair deformation (Reference Examples 4a and 4b). Photographs of hair bundles after permanent wave treatment using the first agent for hair deformation (Reference Examples 5a and 5b).

Hereinafter, embodiments of the present invention will be described with reference to examples.

The second agent for hair deformation of the present embodiment is a second agent for hair deformation used after the first agent for hair deformation, and the first agent for hair deformation is a positive salt and a reduction of a strong acid and a strong base. The agent is blended, the pH is 7.0 or less, and the second agent for hair deformation includes a cationic polymer, an amphoteric polymer containing a structural unit derived from an anionic monomer and a structural unit derived from a cationic monomer. One or more selected from dimethylpolysiloxane and an oxidizing agent are blended.
Further, the hair deformation agent of the present embodiment contains a positive salt of a strong acid and a strong base and a reducing agent, and has a pH of 7.0 or less, that is, a first agent for hair deformation and a first agent for hair deformation. A cationic polymer, an amphoteric polymer containing a structural unit derived from an anionic monomer and a structural unit derived from a cationic monomer, one or more selected from dimethylpolysiloxane, and an oxidizing agent are blended. It is provided with a second agent for hair deformation.

(First agent for hair deformation)
The first agent for hair deformation is used for hair before the second agent for hair deformation according to the present embodiment, and is blended with a reducing agent and a positive salt of a strong acid and a strong base, and has a pH of 7. It is less than or equal to 0.0. As a result, a high hair deformation effect can be obtained.

<Reducing agent>
The reducing agent to be blended in the first agent for hair deformation is not particularly limited, but a known reducing agent having a thiol group can be used. The reducing agent blended in the first agent for hair deformation can give deformation to the hair shape. The first agent for hair deformation contains one or more of the reducing agents.

Examples of the reducing agent include thioglycolic acid, thioglycolate (sodium thioglycolate, ammonium thioglycolate, monoethanolamine thioglycolate, etc.), mercaptopropionic acid, mercaptopropionate, and cysteine (L-cysteine). , DL-Cysteine, etc.), Cysteine salt (L-Cysteine hydrochloride, DL-Cysteine hydrochloride, etc.), Acetylcysteine (N-Acetyl-L-Cysteine, etc.), Cysteine alkyl ester (L-Cysteine methyl ester, L-Cysteine ethyl ester, etc.) ), Cysteine, cystamine salts (such as cysteamine hydrochloride), glyceryl thioglycolate, thioglycerin, thiolactic acid, thiolate, thioalic acid, thioalinate, butyrolactone thiol and the like.
When a reducing agent other than thioglycolic acid is blended as the reducing agent in the first agent for hair deformation of the present embodiment, thioglycolic acid may be further blended. Further, when the first agent for hair deformation of the present embodiment contains a positive salt other than sodium chloride as a positive salt of a strong acid and a strong base, which will be described later, only thioglycolic acid is blended as a reducing agent. You may.

Among the reducing agents, for example, one of thioglycolic acid, thioglycolate, glyceryl thioglycolate, cysteamine, cysteamine salt, butyrolactone thiol, or one of the reducing agents, in order to obtain an excellent hair deformation effect at a pH of 7.0 or less. It is good that two or more kinds are mixed.

The blending amount of the reducing agent in the first agent for hair deformation is preferably 0.5% by mass or more and 11% by mass or less, more preferably 1.5% by mass or more and 9% by mass or less, and 3% by mass or more and 9% by mass or less. Is even more preferable. When it is 0.5% by mass or more, it is preferable from the viewpoint of further enhancing the hair deformation effect, and when it is 11% by mass or less, it is preferable from the viewpoint of suppressing damage to the hair.

<Positive salt of strong acid and strong base>
The positive salt of a strong acid and a strong base contained in the first agent for hair deformation is a salt obtained by the neutralization reaction of the strong acid and the strong base, and the hydrogen of the strong acid and the hydroxyl group of the strong base are not excessive or deficient. It was produced as a reaction. The strong acid is an acid that dissociates all hydrogen when dissolved in water, and examples thereof include hydrochloric acid, sulfuric acid, and nitric acid. The strong base is a base in which all hydroxyl groups are dissociated when dissolved in water, and examples thereof include sodium hydroxide, potassium hydroxide, calcium hydroxide, and magnesium hydroxide.
A high hair deformation effect can be obtained by further adding a positive salt of a strong acid and a strong base to the first agent for hair deformation having a pH of 7.0 or less, which contains a reducing agent.

The first agent for hair deformation contains one or more of the positive salts of the strong acid and the strong base. When a salt other than sodium chloride is added to the first agent for hair deformation as a positive salt of the strong acid and a strong base, sodium chloride may be further added. When a reducing agent other than thioglycolic acid is blended as the reducing agent in the first agent for hair deformation, only sodium chloride may be blended as a positive salt of the strong acid and a strong base. Further, when thioglycolic acid is blended as the reducing agent in the first agent for hair deformation, only sodium chloride may be blended as a positive salt of the strong acid and a strong base.
Examples of the positive salt of the strong acid and the strong base include alkali metal salts such as sodium salt and potassium salt; alkaline earth metal salts such as calcium salt and magnesium salt; and the like.

As the positive salt of the strong acid and the strong base, an alkali metal salt is preferable because a high hair deformation effect can be obtained. Examples of such alkali metal salts include sodium chloride, potassium chloride, sodium sulfate, potassium sulfate, sodium nitrate, potassium nitrate and the like. Among them, one or more of sodium chloride, potassium chloride and sodium sulfate may be blended in order to further enhance the hair deformation effect.

The blending amount of the strong acid and the strong base in the first agent for hair deformation is preferably 0.02% by mass or more and 5% by mass or less, and more preferably 0.1% by mass or more and 3% by mass or less. When it is 0.02% by mass or more, it is preferable from the viewpoint of further enhancing the hair deformation effect, and when it is 5% by mass or less, it is preferable from the viewpoint of the soft feel of the hair after the hair deformation treatment.

The compounding ratio of the reducing agent to the positive salt of the strong acid and the strong base in the first agent for hair deformation is, for example, 0.1 or more and 10 or less.

<pH>
The pH of the first agent for hair deformation is 7.0 or less. As the pH increases, the effect of suppressing hair damage may decrease. Therefore, the upper limit of pH is preferably 6.0 or less, more preferably 5.0 or less. The lower limit of pH is preferably 1.5 or more, more preferably 2.0 or more, still more preferably 4.5 or more, because if the pH is too low, irritation to the skin may occur. As the pH, a measured value at 25 ° C. is adopted.

<Other ingredients that can be added to the first agent for hair deformation>
Among the components other than the above, known components used for the hair deforming agent can be appropriately blended in the first hair deforming agent as long as the effects of the present invention are not impaired. Known components include, for example, anionic surfactants, cationic surfactants, amphoteric surfactants, nonionic surfactants, higher alcohols, lower alcohols, polyhydric alcohols, sugars, fats and oils, ester oils, fatty acids, and hydrocarbons. , Wax, Silicone, Synthetic Polymer Compounds, Semi-Synthetic Polymer Compounds, Natural Polymer Compounds, Proteins, Amino Acids, Animal and Plant Extracts, Microbial Derivatives, Inorganic Compounds, Fragrances, Preservatives, Chelating Agents, UV Absorbents, Reaction Adjustment Examples thereof include agents (dithiodiglycolic acid, etc.), pigments, antioxidants, dyes, pigments, propellants, and the like.

<pH adjuster>
Of the above optional components, in order to adjust the pH of the first agent for hair deformation to 7.0 or less, a pH adjusting agent can be appropriately added. The pH adjuster may be selected from known acids or alkaline agents used in hair deforming agents.
The pH adjuster may contain one or more of an acid or an alkaline agent, or may contain one or more of both an acid and an alkaline agent. Examples of the acid include organic acids such as glycolic acid, lactic acid, glyceric acid, gluconic acid, malic acid, tartaric acid, citric acid, succinic acid, glutamic acid and aspartic acid; and inorganic acids such as hydrochloric acid, sulfuric acid, nitrate and phosphoric acid. Can be mentioned. Examples of the alkaline agent include ammonia and amino alcohols (monoethanolamine, triethanolamine, isopropanolamine, 2-amino-2-methyl-1-propanol, 2-amino-2-methyl-1,3-propanediol. , Etc.), basic amino acids (arginine, etc.), morpholin, caustic alkali (potassium hydroxide, sodium hydroxide), etc.

<Dosage form>
Examples of the dosage form of the first agent for hair deformation include liquid, cream, gel, and foam (foam).

(Second agent for hair deformation)
The second agent for hair deformation of the present embodiment is used after the first agent for hair deformation having a pH of 7.0 or less, which is a mixture of a positive salt of a strong acid and a strong base and a reducing agent, and is cationic. An amphoteric polymer containing a structural unit derived from a polymer and an anionic monomer and a structural unit derived from a cationic monomer, one or more selected from dimethylpolysiloxane, and an oxidizing agent are blended.

<Oxidizing agent>
An oxidizing agent is blended in the second agent for hair deformation of the present embodiment. The oxidizing agent can fix the hair shape after reduction. The second agent for hair deformation may contain one or more oxidizing agents.

Examples of such an oxidizing agent include, but are not limited to, bromate (sodium bromate, potassium bromate, etc.), hydrogen peroxide, perborate (sodium perborate, potassium perborate, etc.) and the like. Be done. It should be noted that the hair deformation effect can be maintained for a long period of time as compared with the case where sodium bromate or the like is blended as an oxidizing agent, and the degree of fading of the hair can be suppressed to a small level. It is preferable to use hydrogen peroxide. When hydrogen peroxide is added to the second agent for hair deformation, for example, even after one week has passed since the hair deformation treatment was performed (after washing the hair once a day, seven times), the hair is deformed. The effect is easy to maintain.

The blending amount of the oxidizing agent in the second agent for hair deformation is preferably 0.1% by mass or more and 10% by mass or less. When it is 0.1% by mass or more, it is preferable from the viewpoint of further enhancing the effect of fixing the hair shape after reduction, and when it is 10% by mass or less, it is preferable from the viewpoint of suppressing damage to the hair.

When a bromate is blended as an oxidizing agent in the second agent for hair deformation, the blending amount is preferably 3.0% by mass or more and 10% by mass or less.

When hydrogen peroxide is blended as an oxidizing agent in the second agent for hair deformation, it is preferably 5% by mass or less, more preferably 3% by mass or less, and 2.5% by mass or less. Is even more preferable. By setting the blending amount, it is possible to suppress an excessive oxidation reaction of the hair, suppress damage to the hair to a small extent, and suppress the degree of fading of the hair due to hydrogen peroxide to a small extent. Further, the blending amount of hydrogen peroxide in the second agent for hair deformation is preferably 0.5% by mass or more, more preferably 1.0% by mass or more, from the viewpoint of sufficiently fixing the hair shape after reduction. preferable.

When a perborate is blended as an oxidizing agent in the second agent for hair deformation, the blending amount is preferably 1.5% by mass or more and 5.0% by mass or less.

<Amphoteric polymer containing a cationic polymer, a structural unit derived from an anionic monomer and a structural unit derived from a cationic monomer, dimethylpolysiloxane>
The second agent for hair deformation of the present embodiment is one or two selected from a cationic polymer, an amphoteric polymer containing a structural unit derived from an anionic monomer and a structural unit derived from a cationic monomer, and dimethylpolysiloxane. The above is blended. By blending the above components with the second agent for hair deformation in this way, it is possible not only to improve the smoothness of the hair after the hair deformation treatment, but also to improve the moist feeling of the hair after the hair deformation treatment. can. In addition, by blending the above components with the second agent for hair deformation, even if the hair is damaged by a reducing agent or an oxidizing agent during the hair deformation treatment, it is possible to suppress the stiffness of the hair after the hair deformation treatment. can.

One selected from a cationic polymer, an amphoteric polymer containing a structural unit derived from an anionic monomer and a structural unit derived from a cationic monomer, and dimethylpolysiloxane, which are blended in the second agent for hair deformation of the present embodiment. Alternatively, the blending amount of two or more kinds is 0.01% by mass or more and 5% by mass or less from the viewpoint of sufficiently obtaining the effects of improving the smoothness of the hair, improving the moist feeling, and suppressing the stiffness. It is preferable, and more preferably 0.05% by mass or more and 3% by mass or less. By setting the blending amount, it is possible to sufficiently obtain the effects of improving the smoothness of the hair, improving the moist feeling, and suppressing the stiffness.

[Cationic polymer]
By blending a cationic polymer with the second agent for hair deformation of the present embodiment, it is possible to suppress stiffness while improving the smoothness and moist feeling of the hair after the hair deformation treatment. The cationic polymer may be blended with one or more of the second agent for hair deformation.
As the cationic polymer to be blended in the second agent for hair deformation of the present embodiment, a cationic polymer containing a structural unit derived from a cationic polysaccharide or a cationic monomer is preferable.

Cationic polysaccharides include cationized celluloses such as polyquaternium-4 (hydroxyethyl cellulose dimethyldiallylammonium chloride) and polyquaternium-10 (O- [2-hydroxy-3- (trimethylammonio) propyl] hydroxyethyl cellulose chloride); guar. Examples thereof include cationized guar gum such as hydroxypropyltrimonium chloride and hydroxypropyl guar hydroxypropyltrimonium chloride; cationized locust bean gum; cationized cassia; cationized phenuglique gum; cationized tara gum; and cationized starch. Among the cationic polysaccharides, cationized cellulose is preferably blended because it is particularly excellent in improving the smoothness of hair and suppressing stiffness.

Examples of the cationic monomer in the cationic polymer containing the structural unit derived from the cationic monomer include dimethyldiallylammonium chloride, diethyldialylammonium chloride, (meth) acrylamidepropyltrimethylammonium, and diethylaminoethyl (meth) acrylate diethyl sulfate. , 2-((Meta) acryloyloxy) ethyltrimethylammonium, (meth) acrylamidepropyltrimethylammonium, (meth) ethyltrimethylammonium acrylate, (meth) acrylateamidopropyllauryldimonium and the like. Here, (meth) acrylamide means any of acrylic acid amide, methacrylic acid amide, and a mixture of acrylic acid amide and methacrylic acid amide. (Meta) acrylic acid means any of acrylic acid, methacrylic acid, and a mixture of acrylic acid and methacrylic acid. (Meta) acryloyl means any of acryloyl group-containing, methacryloyl group-containing, methacryloyl group-containing and methacryloyl group-containing.

Examples of the cationic polymer containing a structural unit derived from a cationic monomer include polydimethylmethylene piperidinium chloride such as polyquaternium-6; dimethyldialylammonium chloride / acrylamide copolymer such as polyquaternium-7; and polyquaternium-16. Vinyl pyrrolidone / methyl vinyl imidazolium copolymer; polyquaternium-52 and other ethyl [(methacryloyloxy) ethyl] dimethylammonium ethyl sulfate / N, N-dimethylacrylamide / dimethacrylate polyethylene glycol copolymer; .. Among the cationic polymers containing structural units derived from cationic monomers, polychlorinated methylene piperidinium is preferably blended because it is particularly excellent in improving the smoothness of hair and suppressing stiffness.

The blending amount of the cationic polymer in the second agent for hair deformation of the present embodiment is, for example, 0.1% by mass or more and 1% by mass or less.

[Amphoteric polymer]
If an amphoteric polymer containing a structural unit derived from an anionic monomer and a structural unit derived from a cationic monomer is blended with the second agent for hair deformation of the present embodiment, the smoothness and moist feeling of the hair after the hair deformation treatment can be obtained. While improving, it becomes possible to suppress stiffness. The amphoteric polymer may be blended with one or more of the second agent for hair deformation.

The structural unit derived from the anionic monomer contained in the amphoteric polymer is preferably a structural unit derived from acrylic acid.
Examples of the structural unit derived from the cationic monomer contained in the amphoteric polymer include structural units derived from dimethyldiallylammonium chloride and structural units derived from methacrylamidepropyltrimethylammonium chloride, and structural units derived from dimethyldialylammonium chloride are more preferable. ..
Therefore, the amphoteric polymer is more preferably an amphoteric polymer (copolymer) having a structural unit derived from acrylic acid and a structural unit derived from dimethyldiallyl ammonium chloride.

Examples of such an amphoteric polymer include dimethyldiallylammonium chloride / acrylic acid copolymer (polyquaternium-22), acrylamide / acrylic acid / dimethyldialylammonium chloride copolymer (polyquaternium-39), polyquaternium-47, and polyquaternium. -53 and the like can be mentioned.

The blending amount of the amphoteric polymer containing the structural unit derived from the anionic monomer and the structural unit derived from the cationic monomer in the second agent for hair deformation of the present embodiment is, for example, 0.1% by mass or more and 1% by mass or less. ..

[Dimethylpolysiloxane]
By blending dimethylpolysiloxane with the second agent for hair deformation of the present embodiment, it is possible to suppress stiffness while improving the smoothness and moist feeling of the hair after the hair deformation treatment. The dimethylpolysiloxane may be blended with one or more of the second agent for hair deformation.

Examples of the dimethylpolysiloxane include a linear dimethylpolysiloxane represented by the following formula (1).

In the above formula (1), the average degree of polymerization n is preferably 1 or more and 8000 or less, and more preferably 5 or more and 3000 or less.
The viscosity of the dimethylpolysiloxane is preferably from 1 mm ² / s or more 100,000,000mm ² / s, more preferably at most 10 mm ² / s or more 3,000,000mm ² / s.
The viscosity of dimethylpolysiloxane (dynamic viscosity at 25 ° C.) is a value of the kinematic viscosity at 25 ° C. confirmed by the first method of the cosmetic raw material standard general test method.

The blending amount of dimethylpolysiloxane in the second agent for hair deformation of the present embodiment is, for example, 0.1% by mass or more and 5% by mass or less.

The pH of the second agent for hair deformation of the present embodiment is preferably 2.0 or more and 11.0 or less. As the pH, a measured value at 25 ° C. is adopted.

In order to adjust the pH of the second agent for hair deformation of the present embodiment, a pH adjusting agent may be appropriately added. As the pH adjusting agent, a known acid or alkaline agent used for a hair deforming agent, or a salt thereof (for example, phosphate) can be used.

Here, when hydrogen peroxide is used as the oxidizing agent for the second agent for hair deformation, the pH is preferably 2.0 or more and 5.0 or less, and the lower limit is more preferably 2.5. The upper limit may be, for example, 4.5 or 3.5. Hydrogen peroxide is generally prone to decomposition, but by setting the pH of the second agent for hair deformation to 5.0 or less, decomposition in the second agent for hair deformation is suppressed and storage stability is improved. Can be enhanced. By setting the pH of the second agent for hair deformation to 2.0 or higher, it becomes possible to suppress irritation to the skin to a small extent.

Here, when a bromate or a perborate is used as the oxidizing agent of the second agent for hair deformation, the pH is preferably 4.0 or more and 10.5 or less, and 5.0 or more and 7. It is more preferably 5 or less.
When a bromate is used as the oxidizing agent for the second agent for hair deformation, the lower limit of pH is particularly preferably 6.0 or more. When perborate is used as the oxidizing agent for the second agent for hair deformation, the lower limit of pH is particularly preferably 5.5 or more.

It is preferable that one or more chelating agents are further blended in the second agent for hair deformation of the present embodiment. The oxidizing agent contained in the second agent for hair deformation may be decomposed by using the metal present in the second agent for hair deformation as a catalyst. However, when a chelating agent is blended in the second agent for hair deformation, it is possible to suppress the decomposition of the oxidizing agent and enhance the storage stability of the oxidizing agent in the second agent for hair deformation.

Examples of the chelating agent include edetonic acid, edetate (disodium edetate, trisodium edetate, tetrasodium edetate, dipotassium edetate, etc.), diethylenetriaminetetraacetic acid, diethylenetriaminetetraacetic acid (diethylenetriaminetetraacetic acid pentasodium). Etc.), ethylenediaminehydroxyethyl triacetic acid, ethylenediaminehydroxyethyl triacetate (ethylenediaminehydroxyethyl trisodium acetate, etc.), hydroxyethanediphosphonic acid, hydroxyethanediphosphonate (tetrasodium hydroxyethanediphosphonate, etc.) Be done. In order to improve the moisturizing feeling of the hair after the treatment, it is preferable to add hydroxyethanediphosphonic acid or hydroxyethanediphosphonate.

The blending amount of the chelating agent in the second agent for hair deformation of the present embodiment is, for example, 0.01% by mass or more and 2% by mass or less, preferably 0.05% by mass or more and 1% by mass or less, and 0.1% by mass. It is preferably 0.5% by mass or more and 0.5% by mass or less. When it is 2% by mass or less, it is suitable for improving the soft feel of the treated hair.

The compounding ratio of the oxidizing agent to the chelating agent in the second agent for hair deformation of the present embodiment is, for example, 1 or more and 50 or less.

<Arbitrary ingredient>
Of the components other than the above, a known component used for the hair deformation agent may be appropriately blended in the second agent for hair deformation of the present embodiment. Known components include, for example, anionic surfactants, cationic surfactants, amphoteric surfactants, nonionic surfactants, alcohols, polyhydric alcohols, sugars, fats and oils, ester oils, fatty acids, hydrocarbons, waxes, silicones. , Synthetic polymer compounds, semi-synthetic polymer compounds, natural polymer compounds, proteins, amino acids, animal and plant extracts, microbial derivatives, inorganic compounds, fragrances, preservatives, UV absorbers, pigments, dyes, pigments, propellants, etc. Can be mentioned.

Examples of the dosage form of the second agent for hair deformation of the present embodiment include liquid, cream, gel, and foam (foam).

(Target hair)
The target hair to be treated with the second agent for hair deformation of the present embodiment and the hair deformation agent of the present embodiment is not particularly limited, and hair having a history of hair dyeing treatment with an oxidative hair dye, oxidative hair dyeing The target hair can be hair or the like that has no history of hair dyeing treatment with the agent.

In general, when hair deformation treatment is performed on hair that has a history of hair dyeing treatment with an oxidative hair dye, the reduction reaction of the reducing agent contained in the first hair deformation agent causes the hair. There is a tendency for the fading of hair to progress easily.

On the other hand, when hydrogen peroxide is blended as an oxidizing agent in the second agent for hair deformation of the present embodiment and the hair deforming agent of the present embodiment, the history of hair dyeing treatment with the oxidative hair dye is used. Even when a certain hair is used as the target hair, the fading of the hair can be suppressed.

(Hair deformation method)
The hair deformation method using the hair deformation agent of the present embodiment can be used for permanent wave and straightening of curly hair.

<Permanent wave>
Permanent wave is a hair deformation method that deforms hair into a wavy shape.
When the second agent for hair deformation and the agent for hair deformation of the present embodiment are used for the permanent wave, it is preferable to follow the treatment step usually performed in the permanent wave. Examples of the treatment step include the following steps (1) to (3).
(1) The hair is wrapped around a wave rod of a desired size, and the first agent for hair deformation is applied to the hair at a predetermined time.
(2) The second agent for hair deformation of the present embodiment is applied to the hair at a predetermined time.
(3) After applying the second agent for hair deformation of the present embodiment, the wave rod is removed from the hair, the hair is washed with water, and then dried.
From the viewpoint of further enhancing the hair deformation effect, the hair wound around the wave rod may be heated in the step (1) above. Further, from the viewpoint of rinsing off the reducing agent in the hair and suppressing hair damage, the hair may be washed with intermediate water before the step (2) above.

<Hair straightening>
Hair straightening is a hair deformation method that stretches and deforms the shape of hair such as curly hair, tiny hair, and wavy hair.
When the second agent for hair deformation and the agent for hair deformation of the present embodiment are used for straightening hair, it is preferable to follow the treatment steps that can be usually performed in straightening hair. Examples of the treatment step include the following steps [1] to [3].
[1] The first agent for hair deformation is applied to the hair, and the first agent is applied at a predetermined time.
[2] Straighten and straighten the hair.
[3] After applying the second agent for hair deformation of the present embodiment to the hair for a predetermined time, the hair is washed with water and dried.
From the viewpoint of rinsing off the reducing agent in the hair to prevent damage to the hair, the hair may be washed with water after the step [1] above. Further, from the viewpoint of further enhancing the hair deformation effect, in the step of the above [2], after the hair is dried, it may be stretched into a linear shape by using a high temperature hair conditioning iron.

Hereinafter, the present invention will be described in detail with reference to Examples, but the description of these Examples does not limit the present invention.

(Examples 1 to 8 and Comparative Examples 1 to 3)
(First agent for hair deformation)
Ammonium thioglycolate, polyoxyethylene cetyl ether (20EO.), Sodium chloride and an appropriate amount of water are mixed, and 25% aqueous ammonia is added to adjust the pH value to a predetermined pH value, and then the total amount becomes 100% by mass. As described above, water was further added to produce a first agent for hair deformation common to Examples 1 to 8 and Comparative Examples 1 to 3 (Table 1 below).
In the production of the first agent for hair deformation in this case, the blending amount and pH of each component were as shown in Table 1. The numerical value of the blending amount in Table 1 below is mass%. Further, in Table 1 below, the description of the water blended in the first agent for hair deformation is omitted for convenience.

(Second agent for hair deformation)
Each component shown in Table 2 below, such as hydrogen peroxide, was mixed with water to produce the second agent for hair deformation of Examples 1 to 8 and Comparative Examples 1 to 3.
In the production of these second agents for hair deformation, the blending amounts of each component were as shown in Table 2. The numerical value of the blending amount in Table 2 below is mass%. Further, in Table 2 below, the description of the water blended in the second agent for hair deformation is omitted for convenience.

(Evaluation hair bundle)
Japanese black hair of the same person was collected so as to weigh 1.5 g, and a hair bundle was prepared. Subsequently, the hair bundle was washed with water, washed twice with Milbon's Deses Neudue Willow Luxe shampoo, and then towel-dried. The hair bundles subjected to the above treatment were used as evaluation hair bundles for wave treatment.

(Evaluation of wave processing, moist feeling, smoothness and non-stiffness)
A hair bundle for evaluation was wrapped around a permanent wave rod having a diameter of 29 mm. Then, 1.5 mL of the first agent for hair deformation was applied to the hair bundle for evaluation, and the hair was left in a constant temperature bath at 38 ° C. for 15 minutes.
Subsequently, intermediate washing was performed, 1.5 mL of each hair deformation second agent of the Example or Comparative Example was applied to the evaluation hair bundle, and the hair was left at room temperature for 10 minutes.
After the elapse of the standing time, the hair was washed with water, and the evaluation hair bundle from which the permanent wave rod was removed was washed with water and dried using a dryer.
Five panelists evaluated the dried hair bundles for "moist feeling", "smoothness", and "non-stiffness".

Evaluation method of "moist feeling" The moist feeling (feeling of moistness) at the tip of the hair bundle was sensory-evaluated in comparison with the standard (Comparative Example 1).
The sensory evaluation was 5 points when the panelists answered that "the moist feeling is better than the standard", 4 points when the panelists answered "the moist feeling is slightly better than the standard", and "moist feeling". Is equivalent to the standard, 3 points, 2 points when the answer is "slightly inferior to the standard", and 1 point when the answer is "the moist feeling is inferior to the standard". , The "moist feeling" was evaluated by adding a score and calculating the average score of the scores of the five panelists.

Evaluation method of "smoothness" The smoothness of the touch when a finger was passed from the middle part of the hair bundle to the tip part of the hair was sensory-evaluated in comparison with the standard (Comparative Example 1).
The sensory evaluation was 5 points when the panelists answered "smoothness is better than the standard", 4 points when the panelists answered "slightly smoother than the standard", and "smoothness". 3 points for "equivalent to the standard", 2 points for "slightly inferior to the standard", and 1 point for "smoothness is inferior to the standard" , And the "smoothness" was evaluated by calculating the average score of the scores of the five panelists.

Evaluation method of "no stiffness" A sensory evaluation was performed in comparison with the standard (Comparative Example 1) to see if the hair bundle felt stiff to the touch.
The sensory evaluation was 5 points when the panelists answered that they did not feel stiffer than the standard, and 4 points when they answered that they did not feel stiffer than the standard. 3 points for "equivalent to", 2 points for "feeling a little stiffer than the standard", and 1 point for the answer "feeling stiffer than the standard". Then, the "non-stiffness" was evaluated by calculating the average score of the scores of the five panelists.

As is clear from Table 2, hair containing a positive salt of a strong acid and a strong base and a reducing agent, used after the first agent for hair deformation having a pH of 7.0 or less, and containing an oxidizing agent. In the second agent for deformation, one or more selected from a cationic polymer, an amphoteric polymer containing a structural unit derived from an anionic monomer and a structural unit derived from a cationic monomer, and dimethylpolysiloxane were blended. It can be seen that Examples 1 to 8 are superior in all of the moist feeling, smoothness, and non-stiffness to the standard (Comparative Example 1) in which the second agent for hair deformation is not blended.

(Reference example 1a to 1g)
Thioglycolic acid, sodium sulfate and an appropriate amount of water are mixed, 25% ammonia water is added to adjust the pH value, and then water is further added so that the total amount becomes 100% by mass, and the hair deformation of Reference Example 1a is performed. The first agent for use was manufactured. Further, in the same production method as the first agent for hair deformation of Reference Example 1a, potassium chloride was added instead of sodium sulfate from the composition of Reference Example 1a (Reference Example 1b), and sodium chloride was added, respectively. (Reference Example 1c), a mixture of water (Reference Example 1d), a mixture of disodium monohydrogen phosphate / 12hydrate and ammonium chloride (Reference Example 1e), disodium monohydrogen phosphate / 12 water. A product containing a Japanese product and 10% HCl (Reference Example 1f) and a product containing ammonium chloride and sodium hydroxide (Reference Example 1g) were produced.
In the production of the first agent for hair deformation of 1a to 1g of each reference example in this case, the blending amount of each component was as shown in Table 3 below. The numerical value of the blending amount in Table 3 below is mass%.

The first agent for hair deformation of 1a to 1g of each of the produced Reference Examples was used for a permanent wave to evaluate the hair deformation effect and finger passage after drying.
For the evaluation of the hair deformation effect, the set rate of the permanent wave-treated hair bundle was calculated and the waviness was evaluated according to the following evaluation methods and evaluation criteria.

Fifty Japanese black hairs of the same person were collected to prepare a hair bundle with a length of 23 cm. Subsequently, the hair bundle was bleached. The bleaching treatment is carried out by 1 part by mass of the treatment agent A1 (aqueous solution of 2% by mass of ammonia, 2% of ammonium hydrogencarbonate and 0.5% by mass of potassium hydroxide) and 2 parts by mass of the treatment agent A2 (6% by mass aqueous solution of hydrogen peroxide). The mixed solution of the part was applied to the hair bundle and left at room temperature for 30 minutes.
The bleached hair bundle was washed with water, and the hair was washed twice with Milbon's Deses Neudue Willow Luxe shampoo, and then towel-dried. The hair bundles subjected to the above treatment were used as evaluation hair bundles for wave treatment.

A hair bundle for evaluation was wrapped around a permanent wave rod having a diameter of 12 mm. Then, 1 mL of each reference example 1a to 1 g of the first agent for hair deformation was applied to the evaluation hair bundle, and the hair was left in a constant temperature bath at 38 ° C. for 15 minutes. Subsequently, the hair was washed with intermediate water, and 1 mL of a second agent for hair deformation containing an oxidizing agent was applied to the evaluation hair bundle and left at room temperature for 10 minutes. After being left to stand, it was washed with water, and the evaluation hair bundle from which the permanent wave rod was removed was immersed in water, and the set rate was calculated based on the following evaluation criteria. After calculating the set rate, the wet hair bundle was fixed and air-dried. The hair bundle after air drying was evaluated for waviness based on the following evaluation criteria.
The first agent for hair deformation of 1a to 1g of each reference example was evaluated twice.

The set rate was measured by using an evaluation hair bundle that was immersed in water and had a substantially concentric shape in water, and the number of rotations when the root of the hair bundle was the starting point and the tip of the hair was the ending point. From the obtained rotation speed, the set rate of each hair bundle was calculated by the following formula, and the average value of the set rate of the hair bundles of each Example and each Comparative Example was obtained.
Set rate (%) = rotation speed x rod diameter (cm) x π / total length of hair bundle (cm) x 100
It should be noted that when the numerical value of the set rate is large, it indicates that the hair deformation effect tends to be large. The set rate is the set rate in the bending set according to Wortmann's report (Wortmann F. -J., Kure N., J.Soc. Cosmet. Chem., 41, 123 (1990)) (when floated on purified water). It is based on the calculation of hair bundle diameter ÷ rod diameter × 100), but here, the calculation formula in the above report is formally changed slightly.

The wave application is based on the strength of the wave application in the hair bundle after air drying (the average wave size of the hair bundle and the average of the linear distance in the vertical direction from the upper end to the lower end of the hair bundle) as the following evaluation criteria. It was evaluated visually according to the above.
⊚: The wave is stronger than the standard.
〇: The wave is slightly stronger than the standard.
-: Compared to the standard, the wave application is almost the same.
Δ: The wave is slightly weaker than the standard.
X: The wave is weaker than the standard.

The evaluation of finger passage after drying was performed according to the following evaluation methods and evaluation criteria. In the evaluation of finger passage after drying, Japanese hair of the same person with a history of hair coloring treatment collected so as to weigh 2 g is used as an evaluation hair bundle, and is the same as the above evaluation of the hair deformation effect. Permanent wave treatment was performed according to the above method, and the dried hair bundles for evaluation after the treatment were evaluated for finger passage after drying.

The hair bundles for evaluation after drying were compared with the standard by finger passage from the middle part to the tip part, and scored by sensory evaluation by 5 panelists.
◎: 5 out of 5 responded that the finger passage after drying was better than the standard.
〇: 4 out of 5 responded that the finger passage after drying was better than the standard.
-: 3 or less out of 5 responded that the finger passage after drying was better than the standard.
Or, 3 or less out of 5 responded that the finger passage after drying was poor compared to the standard.
Δ: 4 out of 5 responded that the finger passage after drying was poor compared to the standard.
×: 5 out of 5 responded that the finger passage after drying was poor compared to the standard.

The evaluation results of Reference Examples 1a to 1g are shown in Table 3 below, and the photograph of the hair bundle evaluated for waviness in Table 3 is shown in FIG. In Table 3, based on Reference Example 1d, the wave application and finger passage after drying were evaluated.

In Table 3 and FIG. 1, Reference Examples 1a, 1b, and 1c containing sodium sulfate, potassium chloride, or sodium chloride are Reference Example 1d containing no positive salt of a strong acid and a strong base, and disodium monohydrogen phosphate. -It can be seen that the waviness and the set rate are superior to those of Reference Examples 1e to 1g containing 12-hydrate or ammonium chloride.

(Reference Examples 2a and 2b)
In addition to the above Reference Examples 1a to 1g, in the same manner as in the same Reference Example, glyceryl monothioglycolate was added instead of thioglycolic acid. Manufactured the agent.
The evaluation results of Reference Examples 2a and 2b are shown in Table 4 below, and the photograph of the hair bundle evaluated for waviness in Table 4 is shown in FIG. In Table 4, the wave application and the finger passage after drying were evaluated with reference to Reference Example 2b.

In Table 4 and FIG. 2, it can be seen that Reference Example 2a containing sodium chloride is superior in waviness and set rate to Reference Example 2b not containing sodium chloride.

(Reference Examples 3a and 3b)
In addition to the above Reference Examples 1a to 1g, in the same manner as in the same Reference Example, glyceryl monothioglycolate was added instead of thioglycolic acid. Manufactured the agent.
The evaluation results of Reference Examples 3a and 3b are shown in Table 5 below, and the photograph of the hair bundle evaluated for waviness in Table 5 is shown in FIG. In Table 5, the wave application and the finger passage after drying were evaluated with reference to Reference Example 3b.

In Table 5 and FIG. 3, it can be seen that Reference Example 3a containing sodium sulfate is superior in waviness and set rate as compared with Reference Example 3b not containing sodium sulfate.

(Reference Examples 4a and 4b)
In addition to the above Reference Examples 1a to 1g, the first agent for hair deformation having the composition of Reference Examples 4a and 4b in Table 6 below, which contains cysteamine hydrochloride instead of thioglycolic acid, is prepared in the same manner as in the reference example. Manufactured.
The evaluation results of Reference Examples 4a and 4b are shown in Table 6 below, and the photograph of the hair bundle evaluated for waviness in Table 6 is shown in FIG. In Table 6, the wave application and the finger passage after drying were evaluated with reference to Reference Example 4b.

In Table 6 and FIG. 4, it can be seen that Reference Example 4a containing sodium sulfate is superior in waviness and set rate as compared with Reference Example 4b not containing sodium sulfate.

(Reference Examples 5a and 5b)
Butyrolactone thiol, POE (10) cetyl ether and an appropriate amount of water are mixed, phosphoric acid is added in a predetermined amount to adjust the pH to 4.5, and then water is further added so that the total amount becomes 100% by mass. The first agent for hair deformation of Reference Example 5a was produced. In addition, Reference Example 5b was produced by blending water instead of sodium sulfate from the composition of Reference Example 5a by the same production method as the first agent for hair deformation of Reference Example 5a.

The evaluation results of Reference Examples 5a and 5b are shown in Table 7 below, and the photograph of the hair bundle evaluated for waviness in Table 7 is shown in FIG. In Table 7, the wave application and finger passage after drying were evaluated with reference to Reference Example 5b.

In Table 7 and FIG. 5, it can be seen that Reference Example 5a containing sodium sulfate is superior in waviness and set rate as compared with Reference Example 5b not containing sodium sulfate.

(Reference Examples 6a to 6f)
Apart from the above Reference Examples 1a to 1g, the first agent for hair deformation having the composition of Reference Examples 6a to 6f in Table 8 below was produced in the same manner as in the reference example.
The evaluation results of Reference Examples 6a to 6f are shown in Table 8 below. In Table 8, the finger passage after drying was evaluated with reference to Reference Example 6f.

In Table 8, Reference Examples 6a to 6d containing sodium chloride and having a pH of 7.0 or less have a pH higher than 7.0 and a pH of 9 as compared with Reference Examples 6e and 6f after drying. It turns out that it is excellent. Comparing Reference Example 6e containing sodium chloride and Reference Example 6f not containing sodium chloride at a pH of 9, no significant difference was observed in finger passage after drying.

(Reference Examples 7a to 7d)
Apart from the above Reference Examples 1a to 1g, the first agent for hair deformation having the composition of Reference Examples 7a to 7d in Table 9 below was produced in the same manner as in the reference example.
The evaluation results of Reference Examples 7a to 7d are shown in Table 9 below. In Table 9, the wave application and the finger passage after drying were evaluated with reference to Reference Example 7d.

From the results in Table 9, Reference Examples 7a to 7c containing sodium chloride are superior in waviness as compared with Reference Example 7d not containing sodium chloride.

Claims (7)

A second agent for hair deformation used after the first agent for hair deformation.
The first agent for hair deformation contains a positive salt of a strong acid and a strong base and a reducing agent, and has a pH of 7.0 or less.
The positive salt of the strong acid and the strong base includes a positive salt of the strong acid and the strong base selected from the group consisting of hydrochloric acid, sulfuric acid, and nitric acid.
The second agent for hair deformation includes one or more selected from a cationic polymer, an amphoteric polymer containing a structural unit derived from an anionic monomer and a structural unit derived from a cationic monomer, and dimethylpolysiloxane. In addition, a second agent for hair deformation, which is characterized by containing an oxidizing agent (however, transglutaminase and sulfite are added to the first agent for hair deformation in the second agent for hair deformation used after the first agent for hair deformation. (Excluding those containing sodium hydrogen hydrogen and sodium pyrosulfite) . The blending amount of one or more selected from the cationic polymer, the amphoteric polymer containing the structural unit derived from the anionic monomer and the structural unit derived from the cationic monomer, and dimethylpolysiloxane is 0.01% by mass or more. The second agent for hair deformation according to claim 1, which is 5% by mass or less. The second agent for hair deformation according to claim 1 or 2, wherein the cationic polymer containing a structural unit derived from a cationic polysaccharide or a cationic monomer is blended. The hair deformation according to any one of claims 1 to 3, wherein the positive salt of the strong acid and the strong base blended in the first agent for hair deformation is an alkali metal salt and / or an alkaline earth metal salt. Second agent. The second agent for hair deformation according to claim 4, which contains a chelating agent. The first agent for hair deformation, which contains a positive salt of a strong acid and a strong base and a reducing agent and has a pH of 7.0 or less, and the second agent for hair deformation according to any one of claims 1 to 5. And, a hair deforming agent. A hair deformation method using the hair deformation agent according to claim 6.

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