JP2023143556A - hair treatment agent - Google Patents

Abstract

To provide a hair treatment agent and a hair treatment method capable of suppressing curl while repairing damage to damaged curly hair or spreading damaged hair.SOLUTION: The hair treatment agent comprises a hair treatment agent A containing 2-30 mass% of levulinic acid and having a pH of 3.0 to 6.5 and a hair treatment agent B containing 1-20 mass% of bromate. The hair treatment method includes: (1) applying the hair treatment agent A to hair; (2) leaving the hair in the applied state to allow the hair treatment agent A to sufficiently act on the hair; (3) washing the hair with water to wash away the hair treatment agent A; (4) applying the hair treatment agent B to the hair; (5) leaving the hair in the applied state to allow the hair treatment agent B to sufficiently act on the hair; (6) washing the hair with water to wash away the hair treatment agent B; and (7) drying the hair.SELECTED DRAWING: None

Description

The present invention relates to a hair treatment agent that can suppress curl while repairing damage to damaged curly hair or spreading damaged hair. The present invention also relates to a hair treatment method that can suppress curl while repairing hair damage by using the hair treatment agent.

In general hair straightening, curls can be suppressed and lengthened by the action of a reducing agent and an oxidizing agent, which are the main ingredients, and mechanical treatment at high temperatures. Specifically, a first agent containing a reducing agent such as thioglycolic acid or its salt, cysteamine or its salt, and an alkaline agent such as aqueous ammonia, monoethanolamine, ammonium hydrogen carbonate, or arginine is applied to the hair. After reducing and cleaving the disulfide bonds present in keratin protein, the process is washed with water, dried with a hair dryer, etc., and stretched into a straight shape by mechanical treatment with an iron at approximately 180°C, and then treated with hydrogen peroxide or sodium bromate. The hair is treated with a second agent whose main ingredient is an oxidizing agent such as oxidizing agent, etc., to oxidize and re-form the disulfide groups, thereby fixing the hair in a straight shape.

However, although hair straightening can suppress curls and lengthen them, the first agent, which is alkaline, causes the hair to swell and soften, causing damage to the hair.

As a hair treatment agent that does not contain a reducing agent, a method using glyoxylic acid or levulinic acid as a hair straightening ingredient has been proposed. For example, Patent Document 1 discloses a method of applying a solution containing glyoxylic acid to hair, leaving it to dry, and then straightening the hair by mechanical treatment at high temperature with a hair straightening iron. . This method can semi-permanently suppress curls and lengthen hair while minimizing damage to the hair, but damage to the hair cannot be repaired. Further, Patent Document 2 discloses that pH 2.0 to 3 contains 2.5 to 20% by mass of glyoxylic acid and 0.1 to 10% by mass of one or more selected from gluconolactone and erucalactone. .8 hair treatment agents are disclosed. Although this hair treatment agent can suppress and lengthen curls and has an excellent feel when used, it cannot repair damaged hair. Further, Patent Document 3 discloses that the composition contains 10 to 25% by mass of glyoxylic acid and 45% by mass or more of polyhydric alcohol, and the total content of glyoxylic acid and polyhydric alcohol is 65% by mass or more, A method is disclosed in which a solution having a pH of 1.0 to 3.0 is applied to the hair and left to stand, followed by washing, drying, and straightening the hair. Although this method can suppress curls and lengthen hair while minimizing damage to the hair, damage to the hair cannot be repaired. Further, Patent Document 4 discloses that the composition contains 13 to 30% by mass of levulinic acid and 1 to 2% by mass of glyoxylic acid, the total content of levulinic acid and glyoxylic acid is 15% by mass or more, and the pH is A method is disclosed in which a solution of 1.5 to 3.0 is applied to the hair and left to stand, followed by washing with water, drying the hair, and straightening the hair. Although this method can suppress curls and lengthen hair while minimizing damage to the hair, damage to the hair cannot be repaired.

Patent No. 6122942 Patent No. 6501937 JP2019-123702 JP2019-123701

The present invention has been made in view of the drawbacks of the prior art, and provides a hair treatment agent capable of suppressing curly hair while repairing damage to damaged curly hair or spreading damaged hair. With the goal. Another object of the present invention is to provide a hair treatment method that can suppress curl while repairing damage to hair by using the hair treatment agent. In addition, the function of suppressing curls in this specification has a broad meaning that includes making damaged curly hair, wavy hair, curly hair, and dry and spread hair due to damage, manageable and beautiful. It is.

As a result of extensive research to solve the above problems, the present inventors have discovered that agent A contains 2 to 30% by mass of levulinic acid and has a pH in the range of 3.0 to 6.5, and bromic acid. A hair treatment agent consisting of a hair treatment agent B containing 1 to 20% by mass of salt, and (1) a hair treatment agent A agent that is applied to the hair, and (2) a hair treatment agent A agent that is left on the hair in the applied state. (3) wash the hair with water to wash away the hair treatment agent A, (4) apply the hair treatment agent B to the hair, and (5) leave the hair in the applied state. A hair treatment method that includes the steps of allowing the hair treatment agent B to sufficiently act on the hair, (6) washing the hair with water to wash away the hair treatment agent B, and (7) drying the hair, repairs damage and suppresses curls. The present inventors have discovered that it is possible to accomplish the following, and have completed the present invention.

That is, the hair treatment agent of the present invention is
It is characterized by consisting of agent A containing 2 to 30% by mass of levulinic acid and having a pH in the range of 3.0 to 6.5, and agent B containing 1 to 20% by mass of bromate. .

Furthermore, the hair treatment method of the present invention includes:
(1) Applying hair treatment agent A to the hair,
(2) the step of leaving the hair alone;
(3) The process of washing the hair with water,
(4) applying hair treatment agent B to the hair;
(5) the step of leaving the hair alone;
(6) the step of washing the hair with water;
(7) Drying the hair;
It is characterized by

The hair treatment agent and hair treatment method according to the present invention can suppress curl while repairing damage to damaged curly hair or spreading damaged hair.

The hair treatment agent of the present invention comprises an agent A containing 2 to 30% by mass of levulinic acid and a pH range of 3.0 to 6.5, and an agent B containing 1 to 20% by mass of bromate. It consists of two drugs.
The present invention will be explained in detail below.

The content of levulinic acid in the hair treatment agent A of the present invention is 2 to 30% by mass, preferably 5 to 15% by mass. If the content is less than 2% by mass, sufficient curl suppression effect and damage repair effect cannot be obtained; on the other hand, even if the content exceeds 30% by mass, the curl suppression effect and damage repair effect commensurate with the content. cannot be expected to improve.

The hair treatment agent A of the present invention needs to maintain a pH in the range of 3.0 to 6.5, preferably in the range of 4.0 to 5.5. If the pH is less than 3.0, a sufficient damage repair effect cannot be obtained, and if the pH exceeds 6.5, a sufficient curl suppressing effect cannot be obtained.
The base for adjusting the pH of the hair treatment agent to the above range is not particularly limited, but includes inorganic bases such as sodium hydroxide and potassium hydroxide, aqueous ammonia, triethanolamine, basic amino acids, etc. Organic bases, monocarboxylic acid salts such as glycolic acid and lactic acid excluding levulinic acid, dicarboxylic acid salts such as maleic acid and malic acid, tricarboxylic acid salts such as citric acid, acidic amino acid salts such as glutamic acid and aspartic acid, phosphoric acid Inorganic acid salts such as polyphosphoric acid, acid salts particularly having a chelating effect such as etidronic acid, edetic acid, phytic acid, etc. can be used.

The content of bromate in the hair treatment agent B of the present invention is 1 to 20% by mass, preferably 5 to 12% by mass. If the content is less than 1% by mass, sufficient curl suppression effect and damage repair effect cannot be obtained, while even if the content exceeds 20% by mass, the curl suppression effect and damage repair effect commensurate with the content. No improvement can be expected.
Examples of bromates include sodium bromate, potassium bromate, and the like. These can be used alone or in combination of two or more.

A keratin compound may be added to the hair treatment agent A of the present invention. The content of the keratin compound is 0.1 to 10% by weight, preferably 2 to 6% by weight. If the content is less than 0.1% by mass, it is impossible to obtain an effect of suppressing and improving curls, and on the other hand, even if the content exceeds 10% by mass, an effect of suppressing and improving curls commensurate with the blended amount cannot be expected.
Examples of the keratin compound include hydrolyzed keratin, sulfonated keratin, carboxymethyl cysteine lysine, and the like. Commercially available hydrolyzed keratin products include Proticute H Gamma and Proticute U Alpha manufactured by Ichimaru Falcos Co., Ltd. Commercially available sulfonated keratin products include Kereffect ^™ SD from CRODA. Commercially available carboxymethylcysteine lysine is available from Sinerga S. p. Examples include Hair APP from Company A.

In addition to the levulinic acid and keratin compound contained in Part A and the bromate contained in Part B, the hair treatment agent of the present invention contains other ingredients normally used in cosmetics and pharmaceuticals. It can be added arbitrarily within a range that does not impair the effects of the invention. Examples of such components include cationic polymers, anionic polymers, nonionic polymers, amphoteric polymers, polyhydric alcohols, sugars, amino acids, peptides, proteins, sequestering agents, oils, powder components, and cationic surfactants. , an anionic surfactant, a nonionic surfactant, an amphoteric surfactant, a pH adjuster, a thickener, a powder component, a fragrance, a powder component, a pigment, water, and the like.

The dosage form of the hair treatment agents A and B of the present invention is not particularly limited as long as the desired effect is sufficiently exhibited, but examples include liquid, emulsion, gel, foam, and cream. It can take a dosage form.

<Hair treatment method>
The hair treatment method of the present invention includes (1) applying hair treatment agent A to the hair, (2) leaving the hair in the applied state to allow the hair treatment agent A to sufficiently act on the hair, and (3) Wash the hair with water to wash away the hair treatment agent A, (4) apply the hair treatment agent B to the hair, and (5) leave the hair in the applied state to allow the hair treatment agent B to fully act on the hair. The method essentially includes the steps of: (6) washing the hair with water to wash away the hair treatment agent B; and (7) drying.

<(1) Hair treatment agent A application step>
The hair treatment agent A of the present invention can be applied to dry hair that has been straightened with a hair styling or hair straightening iron or blow dry, but since the hair treatment agent easily penetrates into the hair, hair coloring is not recommended. Wet hair that has just been treated, wet hair that has been pre-washed with shampoo and drained, towel-dried hair that has removed attached moisture with a towel, wet hair that has been coated with water or highly reduced alkaline water, steam, mist, superheated steam, It is preferable to apply it to hair treated with pressurized superheated steam or the like.
<(2) Leaving process>
After applying the hair treatment agent A, the hair is left at room temperature (approximately 25° C.) or heated for 3 to 40 minutes, more preferably 10 to 20 minutes, to allow the hair treatment agent A to act on the hair. If the leaving time is less than 3 minutes, sufficient curl suppression effect and damage prevention effect cannot be obtained.On the other hand, even if the leaving time exceeds 40 minutes, the curl suppression effect and damage repair effect will not be obtained commensurate with the leaving time. No improvement can be expected.
<(3) Water washing process>
Rinse the hair with hot water to thoroughly wash away the hair treatment agent A from the hair.

<(4) Hair treatment agent B application step>
The hair treatment agent B of the present invention is applied to the hair.
<(5) Leaving process>
After applying the hair treatment agent B, leave it for 1 to 30 minutes, preferably 10 to 20 minutes, at room temperature (about 25° C.) to allow the hair treatment agent B to act on the hair. If the leaving time is less than 1 minute, sufficient curl suppression effect and damage repair effect cannot be obtained.On the other hand, even if the leaving time exceeds 30 minutes, the curl suppression effect and damage repair effect will not be further improved commensurate with the leaving time. No improvement can be expected.
<(6) Water washing process>
Rinse the hair with hot water to thoroughly wash out the hair treatment agent B.

<(7) Drying and process>
After washing, dry the hair with a hair dryer after wiping off the moisture with a towel. Furthermore, the use of a hair styling or hair straightening iron may be added in order to improve the effect of suppressing curls and/or to straighten curls and/or to improve the effect of repairing damage. Specifically, after drying the hair with a hair dryer, the hair is styled while applying heat with a hair styling or hair straightening iron with a surface temperature of 100 to 180°C, preferably 140 to 160°C, or the hair is dried with a hair dryer. After that, the hair is straightened by applying mechanical force and heat to the hair using a hair styling or hair straightening iron with a surface temperature of 150 to 230°C, preferably 180 to 210°C, or the hair is straightened with a surface temperature of 120 to 230°C, preferably 180 to 210°C. Dry the hair while styling or straightening it with a hair styling or hair straightening iron at 130 to 180°C, or dry the hair with a hair dryer and straighten it with a brush, etc., and further, the surface temperature is preferably 100 to 180°C. Arrange the hairstyle while applying heat with a hair styling or hair straightening iron at 140 to 160°C, or dry the hair with a hair dryer and straighten it with a brush, etc., and further, the surface temperature is 150 to 230°C, preferably 180 to 210°C. This is a process of straightening hair while applying mechanical force and heat to the hair using a hair styling or hair straightening iron heated to ℃.

The present invention will be explained in more detail by giving specific examples below, but the present invention is not limited to the following examples. In addition, the blending amounts in the following Examples and the like are expressed in mass % unless otherwise specified.

(Examples 1 to 3 and Comparative Example 1)
A hair treatment agent having the composition listed in Table 1 below was prepared by stirring and mixing each component in purified water until uniform.
The curl-inhibiting effect and damage-repairing effect of the obtained hair treatment agent was evaluated by the following method.

<Creation of test hair bundle>
Natural curly hair (Indian black hair) was trimmed to a length of 30 cm when stretched to create a hair bundle weighing 3 g. Next, each hair bundle was treated with a commercially available powder type bleaching agent, washed seven times with a commercially available shampoo, thoroughly towel dried, and hung vertically with one end of the hair bundle fixed. and leave it at room temperature for 24 hours. Thereafter, each hair bundle is treated again with a commercially available powder type bleaching agent and washed with a commercially available shampoo. Thereafter, the hair is washed with a commercially available shampoo and treated with a commercially available hair conditioner. This operation was repeated 7 times, and the hair was thoroughly towel-dried to obtain a test hair bundle.
<Evaluation of curl suppression effect and damage repair effect>
Apply 5 g of the adjusted hair treatment agent A to the test hair bundle, leave it at 40° C. for 20 minutes, and thoroughly wash away the hair treatment agent A with hot water. Thereafter, 8 g of hair treatment agent B was applied, left to stand at room temperature for 10 minutes, and hair treatment agent B was thoroughly washed away with hot water. After thoroughly towel drying the hair, combing it, thoroughly drying it with a hair dryer, fix one end of the hair bundle and hang it vertically, and leave it at room temperature for 24 hours. Three people with experience evaluated the curl suppression effect and damage repair effect. The damage repair effect was judged from the smooth effect and gloss effect.
<Evaluation criteria for habit suppression effect>
1. Poor organization 2. It's a little disorganized.
3. The consistency is normal.
4. The consistency is somewhat good.
5. Good cohesiveness.
<Smooth effect evaluation criteria>
1. It's rough and feels bad to the touch.
2. It's a little rough and feels a little rough to the touch.
3. It is slightly smooth and has a nice texture.
4. It is smooth and feels good to the touch.
5. It is smooth and feels very good to the touch.
<Gloss effect evaluation criteria>
1. The gloss is a little poor.
2. The shine is normal.
3. It's shiny.
4. Good shine.
5. Very good shine.

As shown in Examples 1 to 3, when the content of levulinic acid was 2 to 30% by mass, sufficient curl suppression effect and damage repair effect were obtained. On the other hand, as shown in Comparative Example 1, when the content of levulinic acid was less than the above, the curl suppression effect and damage repair effect were insufficient.

(Examples 4-5 and Comparative Examples 2-3)
A hair treatment agent having the composition listed in Table 2 below was prepared by stirring and mixing each component in purified water until uniform. The curl-inhibiting effect and damage-repairing effect of the obtained hair treatment agent were evaluated by the methods described above.

As shown in Examples 4 and 5, when the pH of agent A of the hair treatment agent was adjusted to a range of 3.0 to 6.5, sufficient curl-inhibiting effects and damage repair effects were obtained. On the other hand, as shown in Comparative Examples 2 and 3, when the pH was outside the above range, the curl suppression effect or damage repair effect was insufficient.

(Examples 6-7 and Comparative Example 4)
A hair treatment agent having the composition listed in Table 3 below was prepared by stirring and mixing each component in purified water until uniform. The curl-inhibiting effect and damage-repairing effect of the obtained hair treatment agent were evaluated by the methods described above.

As shown in Examples 6 and 7, when the content of bromate was 1 to 20% by mass, sufficient curl suppression effect and damage repair effect were obtained. On the other hand, as shown in Comparative Example 4, when the content of bromate was less than the above, the curl suppression effect and damage repair effect were insufficient.

(Examples 8 to 12 and Comparative Example 5)
A hair treatment agent having the composition listed in Table 4 below was prepared by stirring and mixing each component in purified water until uniform. The hair treatment agent thus obtained was evaluated for its curl-inhibiting improvement effect using the method described above. The evaluation criteria for the effect of suppressing curls when a keratin compound is contained is as follows.

<Evaluation criteria for improving habit suppression effect>
A comparison with Example 2 will evaluate the effect of improving curl suppression.
1. The cohesion becomes slightly worse.
2. There is no improvement in cohesiveness.
3. There is a slight improvement in cohesion.
4. There is an improvement in cohesiveness.
5. There is a significant improvement in cohesiveness.

As shown in Examples 8 to 12, when the content of the keratin compound was 0.1 to 10% by mass, sufficient curl suppression improvement effect and damage repair effect were obtained. On the other hand, as shown in Comparative Example 5, when the content of the keratin compound was less than the above, the effect of improving curl suppression was insufficient.

(Examples 13-14)
A hair treatment agent having the composition listed in Table 5 below was prepared by stirring and mixing each component in purified water until uniform. The curl extension effect and damage repair effect of the obtained hair treatment agent were evaluated by the following method.

<Evaluation of curl extension effect and damage repair effect>
Apply 5 g of the adjusted hair treatment agent A to the test hair bundle, leave it at 40° C. for 20 minutes, and thoroughly wash away the hair treatment agent A with hot water. Thereafter, 8 g of hair treatment agent B was applied, left to stand at room temperature for 10 minutes, and hair treatment agent B was thoroughly washed away with hot water. Thoroughly towel dry, smooth with a comb, and dry with a hair dryer. Then, use a hair straightening iron at 190°C for 10 seconds to straighten the hair. After fixing one end of the hair bundle and hanging it vertically and leaving it at room temperature for 24 hours, three hair stylists with more than 10 years of experience as hairdressers evaluated the hair extension effect and damage repair effect using the following evaluation criteria. The damage repair effect was judged from the smooth effect and gloss effect.
<Evaluation criteria for curl extension effect>
1. The curls are slow to grow and the texture is poor.
2. The texture is a little slow to grow, and the texture is a little difficult.
3. The texture is a little more stretchy and the texture is a little better.
4. The texture is slightly elongated and the texture is good.
5. It has good curls and holds together well.
<Smooth effect evaluation criteria>
1. It's a little rough and feels a little rough to the touch.
2. It is slightly smooth and has a normal texture.
3. It is smooth and has a nice texture.
4. It is smooth and feels good to the touch.
5. It is very smooth and feels very good to the touch.
<Gloss effect evaluation criteria>
1. The gloss is a little poor.
2. The shine is normal.
3. It's shiny.
4. Good shine.
5. Very good shine.

As shown in Examples 13 and 14, when the use of an iron was added to the drying process after washing away the hair treatment agent B, sufficient curl-stretching and damage-repairing effects were obtained.

Claims (3)

It consists of two parts: Part A containing 2 to 30% by mass of levulinic acid and having a pH in the range of 3.0 to 6.5, and Part B containing 1 to 20% by mass of bromate. Characteristic hair treatment agent. The hair treatment agent according to claim 1, wherein the agent A contains 0.1 to 10% by mass of one or more selected from keratin compounds. (1) applying agent A according to claim 1 or 2 to hair;
(2) the step of leaving the hair alone;
(3) The process of washing the hair with water,
(4) applying the agent B according to claim 1 to the hair;
(5) the step of leaving the hair alone;
(6) the step of washing the hair with water;
(7) Drying the hair;
A hair treatment method characterized by: