JP4863606B2 - Treatment method using permanent wave hair treatment agent - Google Patents

Description

The present invention relates to a hair treatment method using a second agent of a two-component permanent wave agent comprising a first agent and a second agent.

  The two-component permanent wave agent cuts the curled hair from the S—S bond by the reducing action of the first agent and then turns the hair into a desired style by the second agent that has an oxidizing action. It is a hair preparation to be fixed.

  Currently, sodium bromate and hydrogen peroxide are listed as oxidants that are the main components of the permanent wave agent second agent (hereinafter also referred to as permanent second agent) used in human hair in Japan.

  Of these, sodium bromate has a relatively low oxidation potential, has a mild effect on the reduced hair produced by the first permanent treatment, has little hair damage due to excessive oxidation, and forms an elastic wave. The advantage is mentioned.

However, sodium bromate has the following problems.
(1) Concerns about safety to the human body are recognized.
(2) Since it is an inorganic salt, diffusion into the hair is slow and the treatment time of the second permanent agent is generally as long as 10 to 15 minutes.
(3) Perm odor (reducing sulfur components such as hydrogen sulfide and methyl mercaptan) may remain in the hair after the second permanent treatment, and in the case of long hair, the wave tends to be removed after perm. There is.

On the other hand, hydrogen peroxide is safer to the human body than sodium bromate, and the treatment time of the second permanent agent is less than 5 minutes, and no permanent odor is observed after the permanent treatment. There are many advantages such as good wave keeping. However, since the oxidation potential is high, the action of hydrogen peroxide on the reduced hair produced by the first permanent treatment is too strong, and the hair is damaged by the generation of cysteic acid and the bleaching action on the melanin pigment in the hair. It is easy to be applied, and problems such as low elasticity of the formed wave are recognized.
German patent invention No. 1043989A specification US Pat. No. 9,694,169A

The present invention is to provide means for solving the above-described problems in the second permanent agent using hydrogen peroxide. Specifically, the present invention has the following objects.
(1) Gives hair the same wave elasticity as the sodium bromate-based permanent second agent.
(2) Less hair damage.
(3) Maintain the other advantages of the hydrogen peroxide-based permanent second agent (the treatment time is within 5 minutes, there is no permanent odor after the permanent treatment, the wave is good, etc.).

  The present inventor has found that the above problem can be solved by using polyvinylpyrrolidone in the second permanent agent using hydrogen peroxide.

  That is, the present invention is an invention for providing a permanent wave method for performing a permanent wave treatment by bringing hydrogen peroxide and polyvinylpyrrolidone into contact with hair treated with the permanent wave first agent. It can carry out by using the following permanent wave 2nd agent or permanent wave 2nd agent preset.

Therefore, the present invention provides a permanent wave agent for bringing the permanent wave second agent according to the following conditions (1) to (6) into contact with the hair treated with the permanent wave first agent and performing permanent treatment on the hair. It is an invention that provides the treatment method used.
(1) containing hydrogen peroxide and polyvinylpyrrolidone,
(2) The content of the hydrogen peroxide is 0.5 to 3.0% by mass of the agent.
(3) The molecular weight of the polyvinylpyrrolidone is 60,000 to 2,000,000.
(4) The content of the polyvinyl pyrrolidone is 0.05 to 20% by mass of the agent.
(5) The pH of the agent is in the range of 2.0 to 5.0.
(6) Does not contain polyoxyethylene cholesteryl ether.
In the present invention, the permanent wave second agent containing hydrogen peroxide and polyvinylpyrrolidone is also referred to as the present permanent second agent.

Furthermore, in the present invention, the preset of the second permanent wave agent including the agent (A) containing hydrogen peroxide and the agent (B) containing polyvinylpyrrolidone is also referred to as the present preset.

  Here, “permanent wave second agent preset” means that two or more kinds of permanent second agent can be prepared by mixing separate agents that are components of the preset. It means a set of agents containing the agent as a component.

As described above the permanent second agent, the perming second agent, hydrogen peroxide and polyvinylpyrrolidone as essential containing component, a permanent wave second agents.

  The content of hydrogen peroxide contained in the second permanent agent is preferably 0.5 to 3.0% by mass of the agent, and particularly preferably 1.0 to 2.5% by mass. When the content is less than 0.5% by mass of the agent, it is difficult to sufficiently exhibit the effect as the second hydrogen peroxide-based permanent wave second agent. The damage is too big.

  The molecular weight of polyvinylpyrrolidone contained in the second permanent agent is preferably 5,000 to 2,000,000. If this molecular weight is less than 5000, the effect of containing polyvinylpyrrolidone in the second permanent agent is not sufficiently exhibited. The enhancement of the elasticity improvement effect is not recognized, and the viscosity of the preparation tends to be increased more than necessary.

  The content of polyvinylpyrrolidone in the second permanent agent is preferably 0.05 to 20% by mass of the agent. More specifically, when the second permanent agent is used to give waves to hair, it is particularly preferably 0.05 to 5.0% by mass of the agent. Moreover, when using this 2nd permanent agent as a curly hair straightening agent by which viscosity is requested | required of an agent, the range of 0.1-20 mass% of an agent is especially suitable.

  The pH of the second permanent agent is preferably 2.0 to 5.0, particularly preferably 2.5 to 4.5. When the pH of the agent is less than 2.0, the effect as the permanent wave second agent is weakened, and when it exceeds 5.0, the preparation tends to be unstable. The pH adjuster is not particularly limited, and various buffer solutions can be used. In particular, a phosphate buffer solution in which phosphoric acid, sodium phosphate, potassium salt, or the like is combined is preferable.

  In addition, in this permanent second agent, in the second component of the permanent wave containing hydrogen peroxide, an effective amount of each component is added within the range that does not impair the effects of the present invention. can do.

  For example, as a hydrogen peroxide stabilizer, a metal ion sequestering agent (for example, edetic acid or a salt thereof, EDTA, sodium stannate, etc.) that can sequester a small amount of metal ions, or a preservative such as phenoxyethanol or parabens is added Is preferred.

Also, nonionic active agents, anionic active agents, amphoteric active agents, cationic active agents, nonionic polymers for the purpose of stabilizing the formulation, improving the feel and gloss of wave-treated hair, and further improving the moisture retention , Anionic polymer, amphoteric polymer, cationic polymer, fatty alcohol, polysiloxane, amino-modified polysiloxane, carboxy-modified polysiloxane, glycol-modified polysiloxane, alkyl-modified polysiloxane, boliols, amino acids, peptides, polypeptides , Hydrocarbons, ester oils, triglycerides, fragrances, pigments and the like can be blended as necessary.

  This permanent second agent is used as the second agent of the two-component permanent wave agent. For example, 1) As the second agent of the cold two-bath type permanent wave method, 2) Treatment at 60 ° C. or lower Used as the second agent in the heated two-bath permanent wave method. 3) The purpose of the treatment is to be used as a second agent of a wave agent that gives the hair a wave or a straightening agent that straightens the hair. As the reducing agent of the first permanent agent used as a premise of the second permanent agent, for example, thioglycolic acid and its salt, thiolactic acid and its salt, cysteine and its salt, N-acetylcysteine, thioglycolic acid and glycerin Ester, thiolactic acid and glycerin ester, cysteamine salt, sulfite, bisulfite and the like can be used.

  The reducing action of the first permanent agent on hair keratin is explained by the following formula (1).

KSSK + 2R-SH ← → 2K-SH + RSSR (1)
[KSSK: cystine binding in hair keratin
R-SH: Reducing agent in the first permanent agent (thioglycolic acid, thiolactic acid, cysteine, etc.)
K-SH: Cysteine residue in hair keratin reduced with Perm 1st agent
R—S—S—R: Disulfide compound produced by oxidation of itself after the reducing agent acts on hair keratin]

  The action of the second permanent agent on the reduced hair keratin is explained by the following equation (2).

2K-SH + H ₂ O ₂ → KSSK + 2H ₂ O (2)
[KSSK: Hair keratin regenerated with the second permanent agent oxidant (hydrogen peroxide)]

  However, since hydrogen peroxide is a strong oxidizing agent, a reaction of the following formula (3) is also likely to occur.

K-SH + 3H ₂ O ₂ → K-SO ₃ H + 3H ₂ O (3)
[K-SO ₃ H: cysteic acid residue in hair keratin excessively oxidized with two-part permanent agent oxidant]

  In order to form an elastic wave with little hair damage, it is ideal to proceed only with the reaction (2). However, in reality, when hydrogen peroxide is used, the reaction (3) is a side reaction. ) Is known to occur, cysteic acid residues increase in the hair keratin, hair strength is weakened, and the wave effect (especially wave elasticity) targeted by the permanent agent is also weak. It becomes.

  In the present invention, when polyvinyl pyrrolidone is present in an aqueous hydrogen peroxide solution, hydrogen peroxide molecules enter between the carbonyl group in pyrrolidone and the tertiary amine in the adjacent pyrrolidone, forming a strong hydrogen bond and peroxidation. It is considered that the movement of hydrogen molecules is restricted.

  Therefore, reaction (3) is suppressed, and reaction (2) occurs preferentially, so that it is considered that hair damage is suppressed and an elastic wave is formed.

  By using this second permanent agent in this way, it is possible to form an elastic wave with less hair damage than when using a second permanent agent containing only hydrogen peroxide as a main component.

This Preset This preset is a set of agents intended for use as a second permanent wave agent, including an agent (A) containing hydrogen peroxide and an agent (B) containing polyvinylpyrrolidone.

  Usually, this preset is a set of agents composed of a combination of agents (A) and (B).

  Agent (A) is an agent containing hydrogen peroxide, and the content of hydrogen peroxide in agent (A) is the mass of agents (A) and (B) according to the second permanent agent described above. It is suitable that it is 0.5-3.0 mass% of the sum, Especially preferably, it is 1.0-2.5 mass%.

In the agent (A), other components that can be contained in a normal permanent second agent containing normal hydrogen peroxide can be added. That is, like the second permanent agent described above, for example, as a hydrogen peroxide stabilizer, a metal ion sequestering agent capable of sequestering a trace amount of metal ions, or a preservative such as phenoxyethanol or parabens is preferably blended. It is. Furthermore, nonionic active agents, anionic active agents, amphoteric active agents, cationic active agents, nonionic polymers are used for the purpose of stabilizing the formulation, improving the feel and gloss of wave-treated hair, and improving moisture retention. , Anionic polymer, amphoteric polymer, cationic polymer, fatty alcohol, polysiloxane, amino-modified polysiloxane, carboxy-modified polysiloxane, glycol-modified polysiloxane, alkyl-modified polysiloxane, boliols, amino acids, peptides, polypeptides , Hydrocarbons, ester oils, triglycerides, fragrances, pigments and the like can be blended as necessary.

  The agent (B) is an agent containing polyvinylpyrrolidone, and the polyvinylpyrrolidone preferably has a molecular weight of 5,000 to 2,000,000 according to the second permanent agent. In addition, the content of polyvinylpyrrolidone in the agent (B) is preferably 0.05 to 20% by mass of the mass sum of the agents (A) and (B) in accordance with the second permanent agent described above. In other words, in the case of an embodiment in which the hair is waved, it is particularly preferably 0.05 to 5.0% by mass of the mass sum of the agents (A) and (B), and the agent is required to have viscosity. In the case of an embodiment as a hair straightener, a range of 0.1 to 20% by mass is particularly suitable.

    Specifically, this preset is used as shown in the following (1) or (2), so that substantially the same effect as when using the second permanent agent described above, ie, only hydrogen peroxide. It is possible to form elastic waves with less hair damage than in the case of using a permanent second agent containing as a main component.

  (1) A method of performing permanent treatment of the hair by bringing the mixed solution of the present preset agent (A) and (B) into contact with the hair treated with the first permanent agent.

  (2) After the pre-set agent (B) is attached to the hair treated with the first permanent agent, the same agent (A) is brought into contact with the hair to perform permanent treatment of the hair. Method.

  In the methods (1) and (2), “hair treated with the first permanent agent” is the same as the treated hair disclosed in the description of the second permanent agent.

  In addition, in the method (1), “mixing at the time of use” is an action mainly performed in a hair salon or the like that performs permanent treatment of hair. Before the timing of the second agent treatment (within 24 hours, preferably within 3 hours, more preferably within 1 hour from the time of using the second permanent agent), the agents (A) and (B) are mixed. , Meaning to be used as a permanent second agent.

  According to the present invention, in the second permanent agent using hydrogen peroxide, there is provided means capable of forming an elastic wave with little hair damage.

  Hereinafter, examples of the present invention will be described and the present invention will be described more specifically. However, the scope of the present invention is not limited by these examples. In addition, the numerical value which shows a compounding quantity is the mass% with respect to a compounding object unless there is particular notice.

[Test Example 1] Effect of blending polyvinylpyrrolidone A first permanent agent having the composition shown in Table 1 and a second permanent agent having the composition shown in Table 2 were prepared, and the wave effect and hair damage were evaluated (Table 3). Evaluation was based on the following method. In addition, Example 1 (HO-2) became a comparative example by procedure correction.

Hair sample :
Human hair (perm, untreated color hair) was washed with 1% aqueous solution of sodium lauryl ether sulfate, rinsed thoroughly with water, and allowed to air dry at room temperature.

TSM :
Make a hair bundle so that 2g of hair is 18cm in length and 3cm in width, form a wave with the first agent and the second agent using a perm rod, and evaluate the elasticity of the wave by 4 people, this average The value was recorded.

・ Score was as follows.
5 points: Very elastic.
4 points: Slightly elastic.
3 points: Elasticity.
2 points: Not elastic enough.
1 point: There is no elasticity.

Wave effect measurement (TTTC) :
Twelve hairs were tied with the root and tip aligned, leaving 1 cm from the knot to the root. Further, a hair bundle was prepared by cutting 12 cm in the direction from the knot to the hair tip.

  The hair bundle was uniformly wound around a glass rod having a diameter of 7.0 mm, immersed in 20 ml of the first agent at 30 ° C. for 10 minutes, immediately rinsed with running water for 30 seconds, and 30 ° C. in 20 ml of the second agent. Treated for 10 minutes. Then, it washed with water, the hair bundle was removed from the glass rod, and it left still for 30 minutes in water.

  The hair bundle becomes a wavy hair coil, and the diameter dW [mm] of the hair coil is measured using a caliper. Next, excess moisture of the hair coil was wiped off and suspended, and the length lw (mm) of the hair coil was measured using a caliper.

  Further, a weight (0.0224 g) was attached to the lower end of the hair coil, and the length lwp (mm) of the hair coil was again measured using a caliper.

  For the same permanent agent, 6 hair bundles were used, and dw, lw and lwp recorded the average value of 6 data.

  The hair coil diameter dw is a numerical value of 7.Omm or more, and the smaller the dw value, the stronger the wave effect.

  The hair coil lengths lw and lwp are numerical values of 12 cm or less, and the smaller the value, the more elastic the wave.

Measurement of hair swelling :
The knot of the perforated hair bundle was cut and a 12 cm long portion was allowed to stand at 25 ° C. and 50% RH for 1 day or longer, and then the mass was measured using a precision balance (Wd). Then, after immersing this hair in 20 ml of purified water for 30 minutes, water outside the hair was removed with a centrifuge (5000 rpm, 5 minutes), and the mass was immediately measured using a precision balance (Ww).

  The degree of swelling Sw (%) was calculated by the following formula.

Sw% = (Ww-Wd) / Wd × 100%
The smaller the swelling, the less hair damage.

Calculation of parameters related to hair coil elasticity (twisting rigidity G of hair fiber, bending Young's modulus E) Using the values measured by the above method, dw, lw, lwp, Wd and Ww, torsional rigidity G of hair fiber, The bending Young's modulus E was calculated. The basis of calculation is the following coil spring type.

l = 2PR ² L (cos ² α / 2IG + sin ² α / IE)
[L: length of the coil spring, P: applied to the coil spring weighted, R: radius of the coil spring, L: entire length of the fibers forming the coil spring, alpha: an angle with respect to the horizontal plane of the fibers of the coil spring, I = πd ^4/32: moment of inertia , D: fiber diameter]

  The effects of adding polyvinylpyrrolidone (PVP) to hydrogen peroxide were clearly recognized in Examples 1 to 3, which are the second permanent agent, compared to Reference Example (HO-1). That is, it can be understood that lw and lwp are reduced by the PVP blending, and the elasticity of the wave is improved such that the physical properties G and E of the hair coil are also increased. Moreover, Sw decreased slightly and hair damage was suppressed. It became clear that the elasticity of the wave also improved in TSM.

  Reference Example H0-1 had less wave elasticity than Reference Example BR-1, but Examples 1-3 were equivalent to BR-1 (10 minutes treatment) even with 5 minutes treatment due to the PVP formulation. The effect of was obtained.

[Test Example 2] Effects of various polymer blends PVP, PVP derivatives and other polymers were selected and blended into the second permanent agent, and the effect on wave elasticity was examined. Table 4 summarizes the main polymers blended in the second permanent agent and their effects.

   In order to evaluate the effect of improving hair elasticity by blending PVP, which was recognized in Test Example 1, a cationic polymer that easily adsorbs to hair [Mercoat 100, Mercoat 550, HC polymer, kachinal HC-200], similar to PVP The effect of improving the elasticity of hair by blending polylysine having a novel polypeptide structure and a PVP derivative (PVP / VA S630, HC polymer) was examined, but none of them affected the effect of PVP.

  From this, it was found that the effect of improving the hair elasticity by the PVP blend was remarkably excellent. The main cause is presumed to be the strong interaction between PVP and hydrogen peroxide molecules, but the details are not clear.

[Test Example 3] Examination of the effect of the second agent when the reducing agent in the first permanent agent was different In Test Examples 1 and 2, the reducing agent in the first agent was ammonium thioglycolate. In this test example, the effect of the 2nd agent with respect to the 1st agent which mix | blended ammonium thio lactate and DL-cysteine hydrochloride as another reducing agent was examined.

  Table 5 shows the prescription of the first permanent agent containing thiolactic acid and cysteine.

  Table 6 shows the effect of the combination of the first agent (TL-1, CYS-1) and the second agent of Test Example 1 [HO-1 (Reference Example), HO-3 (Example 2)]. It was.

  HO-3 (hydrogen peroxide + PVP K-30) in both cases of TL-1 (thiolactic acid) with strong wave power and CYS-1 (cysteine) with weak wave power as the first permanent agent Is more elastic in hair than HO-1 (hydrogen peroxide) (lw and lwp are small), G and E are high in physical properties of hair coil, and the swelling degree of hair is small It was found that there was little hair damage.

  According to Test Example 3, this permanent second agent improves the elasticity of the wave and reduces hair damage regardless of the reducing agent (thioglycolic acid, thiolactic acid, cysteine) of the first permanent agent. Became clear.

  Hereinafter, a prescription example of the first permanent agent and the second permanent agent paired with the first permanent agent will be described as examples.

[Example 4]
The following permanent first and second agents were prepared by a conventional method.

(Thioglycolic acid based permanent first agent)
Compounding component amount (% by mass)
Ammonium thioglycolate solution (50%) 13.5
Diammonium dithiodiglycolate solution (40%) 2.5
Monoethanolamine 1.0
Ammonia water reagent special grade (28%) Balanced ammonium bicarbonate 2.0
EDTA · 3Na 0.1
Cetyltrimethylammonium chloride (40%) 0.5
Torre Silicone SM8704C * 1 2.0
Polyoxyethylene (20EO) oleyl ether 0.5
Fragrance 0.15
Purified water balance total 100.00
pH / 25 ° C (adjusted with aqueous ammonia) 8.8
* 1 Amoji methicone emulsion manufactured by Torre Dow Corning Co., Ltd.

(This perm second agent)
Compounding component amount (% by mass)
Hydrogen peroxide reagent special grade (31%) 6.15
Disodium hydrogen phosphate / 12 water 0.03
Phosphoric acid (85%) Balanced methyl paraben 0.05
Phenoxyethanol 0.5
EDTA · 3Na 0.1
Polyvinylpyrrolidone K-30 * 1 1.0
Cetyltrimethylammonium chloride (40%) 0.5
Purified water balance total 100.00
pH / 25 ° C (adjusted with phosphoric acid) 3.5
* 1 Made by BASF

  A perm treatment was performed on the panel (female color hair, medium) using the first and second perms of Example 4. After the first agent was applied, the head was covered with a cap, and after 10 minutes, rinsed with warm water of about 40 ° C. After towel drying, the second agent was applied and allowed to stand for 5 minutes. After the rod-out, the hair was washed and finished, forming a supple and elastic wave.

Example 5
The following permanent first and second agents were prepared by a conventional method.
( 1st thiolactic acid based permanent agent )
Compounding component amount (% by mass)
Ammonium thiolactate solution (60%) 13.0
DL-cysteine hydrochloride monohydrate 2.0
Monoethanolamine 1.0
Ammonia water reagent special grade (28%) Balanced ammonium bicarbonate 2.0
EDTA · 3Na 0.1
Cetyltrimethylammonium chloride (40%) 0.5
Torre Silicone SM8704C * 1 2.0
Polyoxyethylene (20EO) oleyl ether 0.5
Fragrance 0.15
Purified water balance total 100.00
pH / 25 ° C (adjusted with ammonia water) 9.0
* 1 Amoji methicone emulsion manufactured by Torre Dow Corning Co., Ltd.

( Hydrogen peroxide permanent second agent )
Compounding component amount (% by mass)
Hydrogen peroxide reagent special grade (31%) 6.00
Disodium hydrogen phosphate / 12 water 0.03
Phosphoric acid (85%) Balanced methyl paraben 0.05
Phenoxyethanol 0.5
EDTA · 3Na 0.1
Polyvinylpyrrolidone K-30 1.0
Dicetyldimethylammonium chloride solution (70%) 1.5
Cetostearyl alcohol 0.3
Purified water balance total 100.00
pH / 25 ° C (adjusted with phosphoric acid) 3.5

  The first agent and the second agent were treated for 1 minute and 5 minutes, respectively, on a hair bundle (bleached hair 3 g). A wave was firmly applied from the root and a flexible wave was formed.

[Example 6]
The following permanent first and second agents were prepared by a conventional method.
( Cysteine perm first agent )
Compounding component amount (% by mass)
DL-cysteine hydrochloride monohydrate 6.5
Ammonium thioglycolate solution (50%) 2.0
Monoethanolamine 3.0
Ammonia water reagent special grade (28%) Balance EDTA · 3Na 0.1
Cetostearyl alcohol 0.5
Cetyltrimethylammonium chloride (40%) 0.5
Polyoxyethylene (20EO) cetyl ether 0.1
Fragrance 0.15
Purified water balance total 100.00
The pH was adjusted to 9.1 with aqueous ammonia.

( Hydrogen peroxide permanent second agent )
Compounding component amount (% by mass)
Hydrogen peroxide reagent special grade (31%) 6.50
Disodium hydrogen phosphate / 12 water 0.03
Phosphoric acid (85%) Balanced methyl paraben 0.05
Phenoxyethanol 0.5
EDTA · 3Na 0.1
Polyvinylpyrrolidone K-90 * 1 3.0
Dicetyldimethylammonium chloride solution (70%) 1.2
Cetostearyl alcohol 1.0
Katchinal HC-200 * 2 0.1
Dimethylpolysiloxane (20CS) 1.0
Purified water balance total 100.00
pH / 25 ° C (adjusted with phosphoric acid) 3.5
* 1 Made by BASF * 2 Cationized cellulose Made by Toho Chemical Co., Ltd.

  The first agent and the second agent were treated for 15 minutes and 5 minutes, respectively, on the hair bundle (bleached hair, 3 g). The result was a resilient, supple and supple wave.

[Example 7]
The following first and second hair straighteners were prepared by a conventional method.
( First agent of hair straightener )
Compounding component amount (% by mass)
Thiolactic acid monoethanolamine solution (35%) 15.0
Ammonium thioglycolate solution (50%) 5.0
Monoethanolamine 3.0
Ammonia water reagent special grade (28%) Balance EDTA · 3Na 0.1
Glycerin 10.0
Cetostearyl alcohol 2.5
Stearyltrimethylammonium chloride (80%) 0.5
Polyoxyethylene (20EO) cetyl ether 0.1
Dimethylpolysiloxane (6CS) 1.0
Fragrance 0.15
Purified water balance total 100.00
The pH was adjusted to 9.0 with aqueous ammonia.

( Hydrogen peroxide hair straightener second agent )
Compounding component amount (% by mass)
Hydrogen peroxide reagent special grade (31%) 6.50
Disodium hydrogen phosphate / 12 water 0.03
Phosphoric acid (85%) Balanced methyl paraben 0.1
Phenoxyethanol 0.5
EDTA · 3Na 0.1
Polyvinylpyrrolidone K-90 * 1 3.0
Stearyltrimethylammonium chloride (80%) 1.0
Cetostearyl alcohol 3.5
Behenyl alcohol 1.0
Dimethylpolysiloxane (20CS) 1.0
Purified water balance total 100.00
pH / 25 ° C (adjusted with phosphoric acid) 3.5
* 1 Made by BASF

  Wet hair (5g) treated with oxidative hair dye (commercial red color, 30 ° C, dyed for 30 minutes) with water and apply 5ml of the first agent evenly after towel drying. Then, it was allowed to stand at about 40 ° C. for 10 minutes, rinsed with running water for 30 seconds, dried with a towel, dried with a hair dryer, and evenly stretched while holding the hair bundle with a straight iron. Next, 5 ml of the second agent was evenly applied to the hair bundle, allowed to stand at room temperature for 5 minutes, rinsed thoroughly with running water, and then naturally dried indoors.

  The hair bundle was almost free from discoloration and discoloration, and the hair was completely straightened, resulting in smooth and shiny hair.

[Example 8]
A 5% aqueous solution of polyvinylpyrrolidone K-30 was prepared. The hair bundle (3 g of bleached hair) was treated with the first agent of Example 5 for 10 minutes. After washing with water, this polyvinylpyrrolidone aqueous solution was applied to the hair bundle and allowed to stand for 5 minutes. Next, when the hair bundle was treated with the second permanent agent of Reference Example (HO-1: hydrogen peroxide only) for 5 minutes, an elastic wave was formed.

Claims (2)

The treatment method using the permanent wave agent which makes the permanent wave 2nd agent according to the following conditions (1)-(6) contact the hair processed with the permanent wave 1st agent, and performs the permanent treatment of the said hair.
(1) containing hydrogen peroxide and polyvinylpyrrolidone,
(2) The content of the hydrogen peroxide is 0.5 to 3.0% by mass of the agent.
(3) The molecular weight of the polyvinylpyrrolidone is 60,000 to 2,000,000.
(4) The content of the polyvinyl pyrrolidone is 0.05 to 20% by mass of the agent.
(5) The pH of the agent is in the range of 2.0 to 5.0.
(6) Does not contain polyoxyethylene cholesteryl ether. The treatment method according to claim 1, wherein the treatment time of the hair with the permanent wave second agent is within 5 minutes.