JP2003055168A - Second agent composition for permanent wave and agent for two-bath system permanent wave - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a second agent composition for permanent wave ensuring excellent elasticity of wave and good feeling by a combined formulation of a specific surfactant and an astringent agent to the second agent composition. SOLUTION: The second agent composition for permanent wave includes at least an oxidizing agent and the cationic surfactant together with the astringent agent. An agent for two-bath system permanent wave comprises the second agent composition. The preferable cationic surfactant has pyridinium group and the preferable astringent agent is an alkali metal sulfate.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a second agent composition for a two-bath type permanent waving agent, and a two-bath type permanent waving agent containing the second agent composition.

[0002]

2. Description of the Related Art A two-bath type permanent waving agent comprising a liquid first agent composition and a second agent composition has been conventionally known. Usually, the first agent composition described above contains a reducing agent such as ammonium thioglycolate or cysteine and an alkaline agent such as ammonia or monoethanolamine as main components, and the second agent composition described above comprises sodium bromate or It contains an oxidizing agent such as hydrogen peroxide as a main component. And reduction of hair protein by the first agent (breaking of cystine bond)
Permanent wave of hair is obtained by dissociation of salt and salt bond, and after predetermined treatment such as application of wave, on the contrary, oxidation (reformation of cystine bond etc.) by the second agent.

In such a permanent wave, the hair is damaged by a severe treatment involving cleavage of cystine bond of keratin protein and reformation of cystine bond after application of wave. In addition, it is known that the non-crystalline region protein that constitutes the hair matrix also flows out. As a result, in general, due to the decrease in elasticity of the hair, there was a problem that the expected elasticity of the wave applied to the hair could not be obtained, the holding of the wave was poor, the feel of the hair was deteriorated, etc. .

In order to solve the above problems, various attempts have been made to add various compounding ingredients to the first agent composition and / or the second agent composition. One such attempt is to incorporate a surfactant. Typically,
It is believed that the incorporation of a surfactant has the effect of promoting the penetration of the active ingredient into the hair and stabilizing the hydrophobic ingredient by emulsification. One of other attempts is to add a sulfate such as an alkali metal sulfate. Sulfate is expected to enhance the effects of oxidizing agents and the like in the second agent composition by promoting dehydration of hair by the astringent action.

With regard to the compounding of a surfactant, an alkali metal sulfate or the like into the second agent composition, it is well known that a nonionic surfactant is mainly compounded in the second agent composition. It is also possible to combine a nonionic surfactant and an alkali metal sulfate or the like into the product.
It is known from, for example, Japanese Patent No.

[0006]

[Problems to be Solved by the Invention]
Even if a nonionic surfactant is combined with an alkali metal sulfate as in the invention according to JP-A-6-17324, a special synergistic effect in which the components of both compounds reinforce each other's effects. I found that I could not get.

As a result, even if the second agent composition was blended with a nonionic surfactant and an alkali metal sulfate, the elasticity of the wave was insufficient, or the calculated elasticity of the wave was not obtained. Or, the problem that the wave has a bad hold is not fully solved. The problem of deterioration in the feel of the hair cannot be completely eliminated.

Therefore, the present invention aims to solve these problems. The inventor of the present application has found that the compounding of the cationic surfactant to the second agent composition, particularly the compounding of the cationic surfactant having a pyridinium group is extremely effective for solving the above-mentioned problems, and that the cationic surfactant is astringent. It was clarified that a combination with an active alkali metal sulfate or the like produces an excellent synergistic effect, and the present invention was completed.

[0009]

Means for Solving the Problem and Its Action / Effect (Structure of the First Invention) The structure of the first invention of the present application (the invention according to claim 1) for solving the above problems is a two-bath permanent wave. It is a 2nd agent composition in an agent which contains at least an oxidizing agent, and contains a cationic surfactant and an astringent together, and is a 2nd agent composition for permanent waves.

(Operation / Effect of First Invention) In the first invention, the cationic surfactant is added to the second agent composition, so that various active ingredients incorporated in the second agent composition are stabilized. And, it easily penetrates into the hair. As a result, damage to the hair can be effectively reduced, and good elasticity of the wave is exhibited.

Further, the astringent action of the hair protein based on the astringent compounded in the second agent composition promotes dehydration of hair, and the oxidizing agent which is the main component of the second agent composition easily acts on the hair. . As a result, the reformation of cystine bonds in hair is promoted. In addition to the action of the above surfactant,
The action of this astringent is synergistic, and the elasticity of the hair wave is further enhanced.

[0012] Further, the cationic surfactant improves the finger passage during washing with water after the application of the second agent, and the feel or feel of the finished wave as compared with the above-mentioned other types of surfactants. It is highly effective.

(Structure of the Second Invention) The structure of the second invention of the present application (the invention according to claim 2) for solving the above-mentioned problems is as follows.
The content of the cationic surfactant according to the first invention is 0.01 to 3.0% by weight, and / or the content of the astringent agent is 0.05 to 5.0% by weight. It is a second agent composition for permanent wave.

(Operation and effect of the second invention) The content of the cationic surfactant and the astringent in the second agent composition is
More preferably, it is within the range specified in the second invention. If the content of the cationic surfactant or the astringent agent is too small, their compounding effect will not be sufficiently exhibited. It is feared that even if the content of the cationic surfactant is excessive, the above-mentioned actions and effects are saturated while the skin irritation is increased. Even if the content of astringent is excessive,
While the above-mentioned actions and effects are saturated, there is concern that the scalp may have a tightness and irritation.

(Configuration of Third Invention) The configuration of a third invention of the present application (an invention according to claim 3) for solving the above-mentioned problems is as follows.
The cationic surfactant according to the first invention or the second invention is a second agent composition for permanent wave, which contains a cationic surfactant having a pyridinium group.

(Action and Effect of Third Invention) In the present invention, the cationic surfactant is generally effective, but the cationic surfactant having a pyridinium group is also particularly effective in the effect of the surfactant itself. It was found to be effective, and particularly effective in combination with an astringent. The reason for this is not clear yet, but it is considered to be related to the fact that the cationic surfactant having a pyridinium group is adsorbed on the hair surface to enhance the effect of retaining the wave shape.

(Structure of Fourth Invention) The structure of a fourth invention of the present application (an invention according to claim 4) for solving the above-mentioned problems is as follows.
It is the second agent composition for permanent wave, wherein the astringent agent according to the first invention to the third invention is an inorganic sulfate.

(Operation and Effect of Fourth Invention) The astringent to be incorporated in the second agent composition can be arbitrarily selected, but inorganic sulfate is particularly effective.

(Structure of the Fifth Invention) The structure of the fifth invention of the present application (the invention according to claim 5) for solving the above-mentioned problems is as follows.
The second agent composition for permanent wave according to the fourth aspect, wherein the inorganic sulfate is an alkali metal sulfate.

(Operation / Effect of Fifth Invention) Although the type of the inorganic sulfate to be added as the astringent to the second agent composition can be arbitrarily selected, the alkali metal sulfate is particularly effective.

(Structure of Sixth Invention) The structure of a sixth invention of the present application (an invention according to claim 6) for solving the above-mentioned problems is as follows.
The second agent composition according to the first invention to the fifth invention is a second agent composition for permanent wave, which further contains an amino-modified silicone.

(Operation / Effect of Sixth Invention) When an amino-modified silicone is blended with a permanent wave agent, it is generally expected that it will be adsorbed on the surface of damaged hair to improve moisturizing properties and gloss. When the second agent composition is combined with a cationic surfactant and an astringent agent as in the sixth aspect of the invention, the hardness of the hair due to the astringent effect is reduced and a soft touch finish is imparted. You can expect the effect that you can.

(Structure of Seventh Invention) The structure of a seventh invention of the present application (an invention according to claim 7) for solving the above-mentioned problems is as follows.
The second agent composition according to the first to sixth inventions is a second agent composition for permanent wave further containing at least one component selected from polyvinylpyrrolidone, hydrolyzed protein and amino acid.

(Operation / Effect of Seventh Invention) As a compounding ingredient for a permanent waving agent, generally, polyvinylpyrrolidone has an effect of forming a film on the hair surface and promoting uniform and elastic wave formation. The hydrolyzed protein has the effect of supplementing the protein in the hair that has flowed out during the perm treatment, and the amino acid has the same effect as the hydrolyzed protein and the effect of increasing the moisturizing property of the hair.
You can expect each.

When at least one of these components is added to the second agent composition together with the cationic surfactant and the astringent as in the seventh invention, the hair damage due to the perming treatment is reduced. The effect of forming a uniform and elastic wave can be expected.

(Structure of Eighth Invention) The structure of an eighth invention of the present application (an invention according to claim 8) for solving the above-mentioned problems is as follows.
A two-bath permanent wave agent comprising a first agent composition containing at least a reducing agent and an alkaline agent and a second agent composition according to the first to seventh inventions.

(Operation and Effect of Eighth Invention) The agent for a two-bath type permanent wave of the eighth invention comprises the second agent composition according to any one of the first to seventh inventions as the second agent composition. Since it is used, the effects and advantages of the first to seventh inventions can be secured in the two-bath permanent wave. As for these actions and effects, the target hair is general hair (healthy hair).
Even if the hair is dyed or decolorized, the same effect can be obtained.

[0028]

BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments of the first to eighth inventions will be described. In the following, simply "the present invention"
When referring to, the first to eighth inventions are collectively referred to.

[Second Agent Composition] The second agent composition according to the present invention contains at least an oxidizing agent and is used as a second agent of a two-bath type permanent wave agent. A major feature of this second agent composition is that it contains both a cationic surfactant and an astringent.

In addition to the above, the second agent composition preferably contains amino-modified silicone, polyvinylpyrrolidone, hydrolyzed protein or amino acid as a compounding component having the above-mentioned specific action and effect. Furthermore, various known compounding ingredients such as a polymer compound, a higher alcohol, a vitamin, an oil component, a moisturizer, a hair nourishing agent, a coloring agent, etc., which may be incorporated in the second agent composition, can be optionally incorporated.

The dosage form of the second agent composition can be any dosage form such as liquid, gel, cream, foam, etc., and various compounding ingredients can be arbitrarily divided and adjusted at the time of use. It is also possible to use a two-agent system.

Although the kind of the above-mentioned oxidizing agent is not limited, preferably, potassium bromate, sodium bromate, sodium perborate, hydrogen peroxide solution and the like can be used. The type of the above-mentioned polymer compound is not limited, but preferably, a cationized polymer compound such as a cationized cellulose derivative or a cationic starch can be used. Anionic polymer compounds such as acrylic acid / acrylic acid amide / ethyl acrylate copolymer can also be preferably used. Natural nonionic polymer compound containing cellulose, guar gum, etc., semi-synthetic nonionic polymer compound containing methylcellulose, etc., synthetic nonionic polymer containing polyethyl acrylate, polyacrylic acid amide, etc. A nonionic polymer compound such as a compound can also be preferably used. Hydroxypropyl acrylate / Butylaminoethyl methacrylate /
Amphoteric polymer compounds such as acrylic acid octylamide copolymer can also be preferably used.

The type of the above-mentioned higher alcohol is not limited, but for example, lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol, cetostearyl alcohol, behenyl alcohol, isostearyl alcohol, oleyl alcohol, 2-hexyldecanol, 2-octyldodecanol. And the like can be preferably exemplified.

[Cationic Surfactant] In the second agent composition for permanent wave according to the present invention, the content of the cationic surfactant is not limited, but preferably 0.01 to 3.0% by weight, and further Preferably 0.05-
It is blended at 1.5% by weight.

Although the kind of the cationic surfactant is not limited, a cationic surfactant having a pyridinium group is particularly preferable. As the cationic surfactant having a pyridinium group, laurylpyridinium chloride, cetylpyridinium chloride, lauroylcoraminoformylmethylpyridinium chloride, stearoylcoraminoformylmethylpyridinium chloride and the like can be preferably exemplified. Among these, laurylpyridinium chloride and Cetylpyridinium chloride can be preferably exemplified.

Other cationic surfactants such as quaternary ammonium salts can also be preferably used. Examples of the quaternary ammonium salt include alkyl trimethyl ammonium chloride, lauryl trimethyl ammonium chloride, cetyl trimethyl ammonium chloride, cetyl trimethyl ammonium bromide, stearyl trimethyl ammonium chloride,
Stearyltrimethylammonium bromide, lauryltrimethylammonium bromide, dialkyldimethylammonium chloride, dicetyldimethylammonium chloride, distearyldimethylammonium chloride, dicocoyldimethylammonium chloride, myristyldimethylbenzylammonium chloride, stearyldimethylbenzylammonium chloride, lanolin ethylsulfate Examples thereof include fatty acid aminopropylethyldimethylammonium, benzalkonium chloride, myristyldimethylbenzylammonium chloride and the like.

[Astringent] The content of the astringent in the second agent composition for permanent wave according to the present invention is not limited, but is preferably 0.05 to 5.0% by weight, more preferably 0.05 to 2 0.0 wt% is compounded.

The kind of astringent is not limited, but inorganic sulfates are particularly preferable, and metal sulfates are particularly preferable.
As the metal sulfate, sodium sulfate, potassium sulfate,
Examples thereof include magnesium sulfate, calcium sulfate, zinc sulfate, ferric sulfate, aluminum sulfate and the like. Among these sulfate metal salts, alkali metal sulfate salts are particularly preferable because they have a high rate of coordinated water molecule exchange.

[Other Effective Second Agent Blending Component] In the second agent composition for permanent wave according to the present invention, it is also preferable to blend an amino-modified silicone, polyvinylpyrrolidone, hydrolyzed protein or amino acid.
The content of amino-modified silicone is about 0.05 to 5.0% by weight, and the content of polyvinylpyrrolidone is about 0.05 to 5.0% by weight.
About 2.5% by weight, the content of hydrolyzed protein is 0.0
About 5 to 2.5% by weight, but the amino acid content is 0.05
About 2.5% by weight is preferable for each.

Preferred examples of the amino-modified silicone include aminoethylaminopropylmethylsiloxane / dimethylsiloxane copolymer, aminoethylaminopropylsiloxane / dimethylsiloxane copolymer and the like.

As the hydrolyzed protein, collagen, keratin, elastin, fibroin, conchiolin, soybean protein, casein, gelatin, etc., hydrolyzate obtained by hydrolyzing animal / vegetable proteins with acids, alkalis, enzymes, etc. Preferable examples include quaternized cation-denatured proteins and other polypeptides.

The kinds of amino acids are not particularly limited, but in particular, 20 kinds of α-amino acids constituting proteins of organisms, particularly arginine and lysine which are basic amino acids, glutamic acid and aspartic acid which are acidic amino acids, glycine, Preferred examples include alanine, serine, valine, leucine and the like.

[Two-Bath Permanent Wave Agent] The two-bath permanent wave agent according to the present invention comprises a first agent composition containing at least a reducing agent and an alkali agent.
A second agent composition having any one of the above compositions.

The first agent composition is not limited as long as it contains a reducing agent and an alkaline agent, but in addition, a surfactant, a polymer compound, a higher alcohol, a vitamin, an oil component, a moisturizer, a hair restorer, a coloring agent, etc. Can be arbitrarily mixed.

The type of the reducing agent and the alkaline agent mixed in the first agent composition is not limited, but examples of the reducing agent include thioglycolic acid and its salts, cysteine and its salts, cysteamine, thiolactic acid, and sulfurous acid. Preferable examples are salts and the like. Preferable examples of the alkaline agent include ammonia, alkanolamines, organic amines, basic amino acids, and inorganic alkalis.

The first agent composition and the second agent composition are usually enclosed in separate containers and are sold and distributed as a set. However, even when both of these are separately sold and distributed, they constitute the permanent wave preparation of the present invention as long as they are eventually used as a set as a two-bath permanent wave preparation.

In addition to these waving agents, similar effects can be obtained by using them as curly hair straightening agents for spreading curly hair, curly hair or wave hair.

[0048]

[Examples] Permanent wave agents having the compositions shown in Examples 1 to 5 and Comparative Examples 1 to 3 in Table 1 at the end The first agent and the second agent (the composition of the first agent according to each example and The composition of the second agent is shown in an independent table frame). The numerical values in the table indicate the number by weight.

( Evaluation of elasticity of wave ) Bleach treatment (28% ammonia water; 2.5%, 35% hydrogen peroxide;
3%) three times to form a plurality of hair bundles having a hair amount of 0.4 g and a length of 20 cm, each having a diameter of 1.5
It was evenly wound around a cm plastic rod.

Then, 1 mL of each of the first agents according to the above Examples 1 to 5 and Comparative Examples 1 to 3 was uniformly applied to each of these hair bundles, and then these were made together with a plastic rod made of vinyl. It was housed in a bag, closed, placed in a constant temperature bath at 37 ° C., and left standing for 15 minutes. Then, each hair bundle was taken out of the bag and washed with water for 1 minute, and then 0.5 mL of the second agent according to each of Examples 1 to 5 and Comparative Examples 1 to 3 was uniformly applied, It was left at room temperature for 5 minutes.

The above second agent application operation was repeated once more, and then washed with water to carefully remove the hair bundle from the plastic rod to obtain a coiled wave. The hair bundle according to each example was grasped at one end and hung by its own weight, and the wave length from the upper end to the lower end of one coil was measured.

The smaller the value of the wave length measured as above, the higher the elasticity is evaluated, and the elasticity of the wave of the hair bundle according to each example is evaluated according to the following four grades with Comparative Example 1 as a control. did. “⊚: Resilient and uniform wave. O: Resilient. Δ: Similar to Comparative Example 1. ×: Slightly inferior to Comparative Example 1.” The results of these evaluations are shown in the "Wave elasticity" column of Table 1.

( Evaluation of sustainability of wave ) The hair prepared in the section "Evaluation of elasticity of wave" was subjected to an abuse test in which one end of the wave was immersed in water at 50 ° C for 1 hour. Then, it was taken out from the water and the wave length was measured again in the same manner as above. And the ratio of the wave length before abuse (a) to the wave length after abuse (b) b / a
Was calculated as the wave persistence ratio.

The closer the calculated wave persistence ratio was to 1, the higher the wave sustainability was evaluated, and the wave sustainability was expressed in the following four stages. “A: b / a is 0.
It is 85 or more and 1.0 or less, and the durability of the wave is very high. ◯: b / a is 0.7 or more and less than 0.85, and the durability of the wave is high. (Triangle | delta): b / a is 0.5 or more and less than 0.7, and the durability of a wave is a little low.
X: b / a is less than 0.5 and the durability of the wave is low. ". The results of these evaluations are shown in the column "Wave persistence" in Table 1.

( Evaluation of legibility of test curl ) A hair amount of 0.4 was obtained by using bleaching treatment (28% ammonia water; 2.5%, 35% hydrogen peroxide; 3%) three times.
A plurality of hair bundles each having a length of 20 cm and a length of 20 cm were formed and uniformly wound around a plastic rod having a diameter of 1.5 cm.

Then, 1 mL of each of the first agents according to the above Examples 1 to 5 and Comparative Examples 1 to 3 was uniformly applied to these hair bundles, and then these were made together with a plastic rod made of vinyl. It was housed in a bag, closed, placed in a constant temperature bath at 37 ° C., and left standing for 15 minutes. Then, each hair bundle was taken out of the above bag and washed with water for 1 minute, and then the hair was once removed from the plastic rod and allowed to stand on a flat glass plate. The diameter of the wave of the hair thus left still was measured and used as the wave diameter (c) during the test curl.

Separately, 0.5 mL of the second agent according to each of Examples 1 to 5 and Comparative Examples 1 to 3 was uniformly applied to a hair bundle treated with the first agent in the same manner as above. And left at room temperature for 5 minutes. The above second agent application operation was repeated once more, and then washed with water to carefully remove the hair bundle from the plastic rod to obtain a coiled wave. This hair bundle is allowed to stand on a flat glass plate, and the diameter of the wave of the hair that has been allowed to stand is measured in the same manner as above,
It was defined as the wave diameter (d) when finished.

The visibility of the test curl was evaluated by the ratio d / c of the finished wave diameter (d) and the test curl wave diameter (c). The closer the ratio d / c is to 1, the better the visibility of the test curl.

The evaluation results are shown in the following four grades and shown in the column "Ease of viewing test curl" in Table 1. ⊚: d / c is 0.8 to 1.2, there is almost no wave sagging or tightness, and the test curl is easy to see. ◯: d / c is 0.6 or more and less than 0.8, or 1. More than 2 and 1.4 or less,
There is little dripping or tightness of the wave, and the test curl is slightly visible. (Triangle | delta): d / c is 0.4 or more and less than 0.6, or more than 1.4 and less than 1.6, the wave is slightly sagging or slightly too tight, and the test curl is slightly difficult to see.
X: d / c is less than 0.4 or 1.6 or more, the wave is drooped or too tight, and the test curl is difficult to see. ".

( Evaluation of hair feel ) Bleach treatment (28%
Ammonia water; 2.5%, 35% hydrogen peroxide; 3%) was used three times, and the amount of hair was 1.0 g and the length was 15 c.
A plurality of hair bundles each having a length of m were formed and wound around a plastic rod uniformly.

Then, 1 mL of each of the first agents according to the above Examples 1 to 5 and Comparative Examples 1 to 3 was uniformly applied to these hair bundles, and then these were made together with a plastic rod made of vinyl. It was housed in a bag, closed, placed in a constant temperature bath at 37 ° C., and left standing for 15 minutes. Then, each hair bundle was taken out of the bag and washed with water for 1 minute, and then 0.5 mL of the second agent according to each of Examples 1 to 5 and Comparative Examples 1 to 3 was uniformly applied, It was left at 25 ° C for 10 minutes.

After that, the hair was washed with water, and the resulting wavy hair was naturally dried, and then the dry feel was evaluated. Each of these feeling evaluations was evaluated by the touch by five expert panelists, and the following four grades were evaluated using Comparative Example 1 as a control. “A: Very smooth and moist feel. O: Smooth feel. Δ: A touch similar to that of Comparative Example 1. X: Roughness and dryness were felt compared to Comparative Example 1, and a bad feel was felt. It is. ” The evaluation results of the above-mentioned feeling are shown in the "feel" column of Table 1.

( Comprehensive Evaluation ) Comparative Example 1 was used as a control from the above “wave elasticity evaluation”, “wave durability evaluation”, “test curl legibility evaluation” and “hair feel evaluation”. The quality of the permanent waving agent according to each example was comprehensively evaluated. As for the evaluation symbols, ⊚ means “very high quality”, ◯ means “high quality”, and Δ means “quality equivalent to Comparative Example 1”.

(Application to bleach-treated hair) As Example 6, a model which had been previously subjected to hybridizing twice was treated with the first and second agents for permanent wave having the composition shown below. . As a result, a good and calculated elastic wave was obtained, and there was no problem with regard to the feel (roughness) of the finish.

[0065]   First agent 50% ATG 2.0 (wt%) DL cysteine 3.5 28% ammonia 1.5 Monoethanolamine 2.5 Liquid paraffin 0.5 POE oleyl ether 0.7 Lauryl trimethyl ammonium chloride 0.3 Glycerin 1.0 Arginine 0.2 Marcourt 100 0.2 The remaining amount of purified water.

Second agent Sodium bromate 8.0 POE (20) sorbitan monolaurate 1.0 Laurylpyridinium chloride 1.2 Stearyl trimethyl ammonium chloride 0.7 Glycine 0.5 Sodium sulfate 2.0 Phosphoric acid 0.05 Amino-modified silicone 1.0 Polyvinylpyrrolidone 0.3 The remaining amount of purified water.

[0067]

[Table 1]

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 4C083 AB012 AB082 AB312 AB332                       AB351 AB352 AB412 AC022                       AC122 AC182 AC302 AC442                       AC532 AC542 AC581 AC582                       AC692 AC772 AD071 AD072                       AD132 AD161 AD162 AD411                       AD442 BB06 BB43 BB53                       CC34 DD06 EE06 EE07 EE25

Claims (8)

[Claims] 1. A two-bath type permanent wave agent, which is a second agent composition containing at least an oxidizing agent, wherein the second agent composition contains both a cationic surfactant and an astringent agent. Second agent composition. 2. The content of the cationic surfactant is 0.01 to 3.0% by weight, and / or the content of the astringent is 0.05 to 5.0% by weight. The permanent wave second according to claim 1, wherein
Agent composition. 3. The second agent composition for permanent wave according to claim 1 or 2, wherein the cationic surfactant contains a cationic surfactant having a pyridinium group. 4. The second agent composition for permanent wave according to claim 1, wherein the astringent agent is an inorganic sulfate. 5. The second agent composition for permanent wave according to claim 4, wherein the inorganic sulfate is an alkali metal sulfate. 6. The second agent composition for permanent wave according to claim 1, wherein the second agent composition further contains an amino-modified silicone. 7. The second agent composition further contains at least one component selected from polyvinylpyrrolidone, hydrolyzed protein, and amino acid.
~ The second agent composition for permanent wave according to claim 6. 8. A two-bath comprising a first agent composition containing at least a reducing agent and an alkaline agent, and a second agent composition according to claim 1. Formula permanent wave agent.