JP2020070282A - Hair treatment agent and permanent wave treatment method - Google Patents

Abstract

To provide hair treatment agents and permanent wave treatment methods that can form curls with elasticity.SOLUTION: The hair treatment agent of the present invention contains maleic acid in an amount of 2.0 to 7.0 wt.% and has a pH in the range of 2.5 to 4.5. In addition, the permanent wave treatment method of the invention comprises a first-stage reduction step with a keratin-reducing component → a winding step → a second-stage reduction step with a keratin-reducing component → a first-stage oxidation step with the hair treatment agent → a second stage oxidation step with an acid rinse agent containing levulinic acid → an intermediate rinsing step → a bonding time step → a third stage oxidation step with oxidant → a rod out step → a shampoo step.SELECTED DRAWING: None

Description

  The invention also relates to a hair treatment and a method of permanent waving capable of forming elastic curls.

  A general permanent wave can form a curl on hair by the action of a reducing agent and an oxidizing agent which are main components. Specifically, it is wrapped around a rod, and a reducing agent such as thioglycolic acid or a salt thereof, cysteamine or a salt thereof, and a first agent containing an alkaline agent such as ammonia water, monoethanolamine, or ammonium hydrogen carbonate is applied to the hair. By applying, the disulfide bond existing in the keratin protein is reductively cleaved and treated with a second agent containing an oxidizing agent such as hydrogen peroxide or sodium bromate as a main component to oxidize and re-form the disulfide group, and thus the hair. Is fixed in a curled shape.

  However, the curl thus obtained was accompanied by hair damage, the curl was not sufficiently durable, and the curl was not finished well. In addition, the average life expectancy in 2017 is 81.09 years for men and 87.26 years for women (Ministry of Health, Labor and Welfare). The elasticity of hair decreases with age, so elastic curls are desired. .. Therefore, it is desired to develop a hair treatment agent and a permanent wave treatment method that eliminate these drawbacks.

  In Patent Document 1, the first-stage reduction process → winding process → second-stage reduction process → first-stage oxidation process of applying an acid rinse agent containing levulinic acid → intermediate water washing process → bonding time process → second-stage oxidation process. A method of sequentially performing a rod-out process, a shampoo process, and a blowing process, and further discloses a permanent wave treatment method in which a test curl process is performed after a reduction action time process. With this method, hair damage was reduced, the desired curl persistence and texture were good, and a curl finish with a light image could be achieved, but it is possible to achieve the curl with the elasticity currently required. Can not.

Patent No. 4648492

  The present invention has been made in view of the above-mentioned drawbacks of the prior art, and an object of the present invention is to provide a hair treatment agent and a permanent wave treatment method capable of forming an elastic curl.

  As a result of intensive studies to solve the above-mentioned problems, the present inventor has adjusted maleic acid to a range of 2.5 to 4.5 containing 2.0 to 7.0 wt% of maleic acid. Hair treatment agent, first step reduction step with keratin reducing component → winding step → second step reduction step with keratin reducing component → first step oxidation step with hair treatment agent of the present invention → acid rinse containing levulinic acid We found that elastic curls can be formed by a permanent wave treatment method that includes a second-stage oxidation process using an agent → an intermediate water washing process → a bonding time process → a third-stage oxidation process using an oxidizing agent → a rod-out process → a shampoo process. The invention was completed. Maleic acid is recognized to have a pH adjusting action and is widely used in cosmetics. However, it was not known that it has a curling effect with elasticity.

That is, the hair treatment agent of the present invention is
It is characterized by containing 2.0 to 7.0% by weight of maleic acid and having a pH in the range of 2.5 to 4.5.

Further, the permanent wave processing method of the present invention,
(1-1) A first step reduction step of applying a permanent wave first agent containing thioglycolic acid, which is a keratin-reducing component, to the hair, and (1-2) winding a rod, and after a winding step, (1) -3) A two-step reduction process comprising a second-stage reduction process in which another permanent wave first agent containing cysteamine, which is a keratin-reducing component, is applied and allowed to stand. (2-1) A first step oxidation step of applying the hair treatment agent of the present invention to this hair, and (2-2) a second step oxidation step of applying an acid rinse agent containing levulinic acid, (2) -3) Rinse with hot water, intermediate washing step, (2-4) leave at room temperature for 5 minutes, binding time step, and (2-5) permanent wave containing bromate, which is an oxidizing agent, or hydrogen peroxide. A three-stage oxidation process consisting of a third-stage oxidation process in which the second agent is applied twice and left to stand. (3-1) A finishing step including a step of removing the rod from this hair, a rod-out step, and then (3-2) washing hair and a shampoo step. The method is characterized by comprising the two-step reduction step, the three-step oxidation step, and the finishing step.

  The hair treatment agent of the present invention can form elastic curls.

<Hair treatment agent>
The hair treatment agent of the present invention essentially contains maleic acid. Hereinafter, the present invention will be described in detail.

  The content of maleic acid is 2.0 to 7.0% by weight, preferably 3.5 to 5.5% by weight, based on the total amount of the hair treatment agent of the present invention. If the blending amount is less than 2.0% by weight, a curl having sufficient elasticity cannot be obtained. On the other hand, if the blending amount is more than 7.0% by weight, the curling effect is improved with elasticity corresponding to the blending amount. Can't expect.

  Levulinic acid may be further added to the hair treatment composition of the present invention in order to increase the elastic curling effect. The content of levulinic acid is 0.1 to 5.0% by weight, preferably 1.5 to 3.0% by weight, based on the total amount of the hair treatment agent of the present invention. When the amount is less than 0.1% by weight, the elastic curling effect cannot be improved. On the other hand, when the amount is more than 5.0% by weight, the elastic curling effect corresponding to the amount is obtained. No improvement can be expected.

The hair treatment agent of the present invention has a pH of 2.5 to 4.5, preferably 3.0 to 4.0. If the pH is less than 2.5, the elastic curling effect cannot be obtained due to the astringent action of hair, and if the pH is more than 4.5, the elastic curling effect cannot be obtained.
As the alkaline agent for adjusting the pH of the hair treatment agent to the above range, inorganic bases such as sodium hydroxide and potassium hydroxide, organic bases such as triethanolamine, isopropanolamine and basic amino acids, preferably primary Amines can be used.

  As another preferred component, (lanes 40-Na maleate / styrene sulfonic acid) copolymer may be added, and the blending amount is 0.2 to 1.5% by weight based on the total amount of the hair treatment agent of the present invention. , Preferably 0.5 to 1.0% by weight. If the blending amount is less than 0.2% by weight, the curling effect cannot be improved. On the other hand, if the blending amount exceeds 1.5% by weight, the curling effect corresponding to the blending amount cannot be expected to be improved.

  The hair treatment agent of the present invention contains maleic acid, levulinic acid, primary amines and (lanes 40-Na maleic acid / styrene sulfonic acid) copolymer, as well as other components usually used in cosmetics and pharmaceuticals. It can be optionally added 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, cationic interfaces. An active agent, 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 can be contained.

  The dosage form of the hair treatment agent of the present invention is not particularly limited as long as the desired effect can be sufficiently exerted, but for example, liquid, emulsion, gel, foam, cream, etc. dosage forms can be adopted. .. In the case of an emulsion, gel or cream, it can be applied evenly to the hair wound around the rod by diluting it with water before use.

<Permanent wave treatment method>
The permanent wave treatment of the present invention comprises: (1-1) applying a first step of a permanent wave containing thioglycolic acid, which is a keratin-reducing component, to hair, and a (1-2) winding a rod. After the winding step, (1-3) a two-step reduction step comprising a second step reduction step of further applying another permanent wave first agent containing cysteamine, which is a keratin reducing component, and allowing it to stand. (2-1) A first step oxidation step of applying the hair treatment agent of the present invention to this hair, and (2-2) a second step oxidation step of applying an acid rinse agent containing levulinic acid, (2) -3) Rinse with hot water, intermediate washing step, (2-4) leave at room temperature for 5 minutes, binding time step, and (2-5) permanent wave containing bromate, which is an oxidizing agent, or hydrogen peroxide. A three-stage oxidation process consisting of a third-stage oxidation process in which the second agent is applied twice and left to stand. (3-1) A finishing step including a step of removing the rod from this hair, a rod-out step, and then (3-2) washing hair and a shampoo step. The two-stage reduction process, the three-stage oxidation process, and the finishing process are essential.

  (1-1) The first permanent wave agent containing thioglycolic acid, which is a keratin-reducing component, is applied to the hair evenly within the desired range of curl formation. (1-2) (1-1) A range in which a permanent wave first agent containing thioglycolic acid, which is a keratin-reducing component, is applied to the hair is wrapped with a rod, and (1-3) is a keratin-reducing component. Another permanent wave first agent containing cysteamine is evenly applied to the entire range of (1-1) the hair to which the permanent wave first agent containing thioglycolic acid which is a keratin-reducing component is applied. The blending amounts of thioglycolic acid and cysteamine are set according to the condition of hair.

  (2-1) The hair treatment agent of the present invention applied in the first-step oxidation step is (1-1) a permanent wave first agent containing thioglycolic acid which is a keratin-reducing component in hair, and (1- 3) Furthermore, it is evenly and thoroughly applied over the entire range of application of another permanent wave first agent containing cysteamine, which is a keratin-reducing component.

  (2-2) The acid rinsing agent containing levulinic acid applied in the second-stage oxidation step should be 1000 mL to 2000 mL evenly and thoroughly throughout the range applied with (2-1) the hair treatment agent of the present invention. It is desirable to apply it to. The blending amount of levulinic acid is set according to the condition of hair. In addition to levulinic acid, other components commonly used in cosmetics, pharmaceuticals and the like can be optionally added to the acid rinsing agent containing levulinic acid within a range that does not impair the effects of the present 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, cationic interfaces. An active agent, 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 can be contained. The dosage form is not particularly limited as long as the desired effect is sufficiently exhibited, and for example, liquid, emulsion, gel, foam, cream, and other dosage forms can be used. In the case of an emulsion, gel or cream, it can be applied evenly to the hair wound around the rod by diluting with water at the time of use.

  Hereinafter, the present invention will be described in more detail with reference to specific examples, but the present invention is not limited to the following examples. Further, the compounding amount in the following examples and the like is shown by weight% unless otherwise specified.

(Examples 1 to 9 and Comparative Examples 1 to 4)
A hair treatment composition having the composition shown in Table 1 below was prepared by stirring and mixing each component in purified water until the components were uniform.
The elastic curling effect of the obtained hair treatment agent was evaluated by the following method.

<Evaluation of elastic curls>
Human hair (Chinese) was trimmed to a length of 15 cm to prepare a hair bundle with a weight of 1 g. Then, each hair bundle was washed with a commercially available shampoo to obtain a test hair bundle.
The hair bundle is (1-1) a first step reduction step of applying 5 mL of a permanent wave first agent containing thioglycolic acid, which is a keratin-reducing component, and (1-2) winding a rod, winding step After that, (1-3) a two-step reduction step consisting of a second-step reduction step in which 5 mL of another permanent wave first agent containing cysteamine, which is a keratin-reducing component, is applied and left for 10 minutes. (2-1) First step oxidation step of applying 5 mL of the hair treatment agent of the present invention, and (2-2) Second step oxidation step of applying 100 mL of an acid rinse agent containing levulinic acid, (2- 3) Rinsing with hot water for 15 seconds, intermediate washing step, (2-4) leaving at room temperature for 5 minutes, binding time step, and (2-5) permanent wave second agent containing bromate as an oxidizing agent. A three-stage oxidation process consisting of a third-stage oxidation process in which 10 mL is applied twice and left for a total of 7 minutes and 8 minutes for 15 minutes. (3-1) A curl was formed in a finishing process including a rod-out process of removing the rod from the hair, and (3-2) washing of the hair and a shampoo process after the rod-out process.
After the hair bundle was sufficiently wet with water and allowed to stand at room temperature for 24 hours in a hanging state, three people having 10 years or more beautician experience evaluated the elastic curling effect according to the following evaluation criteria.
<Evaluation criteria of curl forming power>
1. Weak curl formation 2. Curling slightly weak 3. Slightly strong curl formation 4. Slightly strong curl formation 5. Curls are formed 6. High curl formation <Evaluation criteria for elasticity>
Stiff Slightly stiff Weak elasticity Slightly weak elasticity Slightly high elasticity Slight elasticity Slight elasticity

  As shown in Examples 1 to 9, when a hair treatment agent having a maleic acid content of 2 to 7% by weight and a pH of 2.5 to 4.5 was used, sufficient curling power and elasticity were obtained. .. On the other hand, as shown in Comparative Examples 1 to 4, when the blending amount of maleic acid or the pH was out of the above range, the curl forming force and / or the elastic feeling was insufficient.

(Examples 10 to 18)
A hair treatment composition having the composition shown in Table 2 below was prepared by stirring and mixing each component with purified water until the components were uniform.
The elastic curling effect of the obtained hair treatment agent was evaluated according to the above criteria.

  As shown in Examples 10 to 18, a hair treatment agent containing maleic acid in the range of 2 to 7% by weight, pH 2.5 to 4.5, and levulinic acid in the range of 0.1 to 5% by weight was used. In this case, sufficient curl forming force and elasticity were obtained.

(Examples 19 to 22 and Comparative examples 5 to 8)
A hair treatment composition having the composition shown in Table 3 below was prepared by stirring and mixing each component with purified water until the components were uniform.
The elastic curling effect of the obtained hair treatment agent was evaluated according to the above criteria.

  As shown in Examples 19 to 22, when a hair treatment agent adjusted with monoethanolamine which is a primary amine as an alkaline agent is used in a pH range of 2.5 to 4.5, a sufficient curl is obtained. A forming force and a feeling of elasticity were obtained. On the other hand, as shown in Comparative Examples 5 to 8, when the pH was out of the above range, the curl forming force and / or the elastic feeling was insufficient. The elasticity was insufficient.

(Examples 23 to 34)
A hair treatment composition having the composition shown in Table 4 below was prepared by stirring and mixing each component in purified water until the components were uniform.
The elastic curling effect of the obtained hair treatment agent was evaluated according to the above criteria.

As shown in Examples 23 to 34, when the hair treatment agent to which the (Lanes 40-Na maleate / styrene sulfonic acid) copolymer was added was used, sufficient curling power and elasticity were obtained.

Claims (5)

A hair treatment agent containing 2.0 to 7.0% by weight of maleic acid and having a pH of 2.5 to 4.5. The hair treatment agent according to claim 1, which contains levulinic acid in an amount of 0.1 to 5.0% by weight. The hair treatment agent according to claim 1 or 2, wherein the component for adjusting the pH to 2.5 to 4.5 is a primary amine. The hair treatment agent according to claim 1, which comprises 0.2 to 1.5% by weight of (Lanes 40-Na maleate / styrene sulfonic acid) copolymer. (1-1) A first step reduction step of applying a permanent wave first agent containing thioglycolic acid, which is a keratin-reducing component, to the hair, and (1-2) winding a rod, and after a winding step, (1) -3) A two-step reduction process comprising a second-stage reduction process in which another permanent wave first agent containing cysteamine, which is a keratin-reducing component, is applied and allowed to stand. (2-1) Applying a hair treatment agent according to any one of claims 1 to 4 to the hair, a first-step oxidation step, and (2-2) applying an acid rinse agent containing levulinic acid. Two-step oxidation step, (2-3) rinsing with hot water, intermediate washing step, (2-4) leaving for 5 minutes at room temperature, binding time step, and (2-5) bromate as an oxidant, Alternatively, a three-stage oxidation process including a third-stage oxidation process in which a permanent wave second agent containing hydrogen peroxide is applied twice and allowed to stand. (3-1) A finishing step including a step of removing the rod from this hair, a rod-out step, and then (3-2) washing hair and a shampoo step. A permanent wave treatment method comprising the two-step reduction step, the three-step oxidation step, and the finishing step.