JPS60197615A - Acidic oxidizing agent for permanent hair waves - Google Patents

Abstract

PURPOSE:The titled oxidizing agent that contains an organic acid, buffering agents and sodium bromate so that the pH value is adjusted to a specific range, thus stabilizing acidic oxidation of permanent waves by inhibiting the fluctuation in pH as little as possible. CONSTITUTION:The objective agent contains, as essential ingredients, 0.2- 1.5wt% of an organic acid selected from citric, malic, lactic, tartric, succinic, levulic, acetic, aspartic and glutamic acids, 0.15-2.0wt% of buffer agents of e.g., sodium citrate, sodium malate or arginin and 3.0-15.0wt% of sodium bromate so that the pH comes into the range from 4.0 to 4.9. The oxidizing agent permit the oxidation operation with pH flucturation of only + or -0.05-0.1, has strong oxidizing power even in low concentrations with high reaction velocity, resulting in stabilized operations of permanent wave setting.

Description

[Detailed description of the invention] This invention relates to improvements in oxidizing agents for acidic perms.

In acidic perm treatment, it is desired that the μ value of the oxidizing agent aqueous solution is always stable. In other words, the oxidizing agent for acidic and f-mers has a μ value of 4.00 to 4.9, but even if the concentration of the oxidizing agent is low, it always has the desired stable oxidizing power, and when used, it must be diluted with water. It is also desired that the μ value does not fluctuate, and that it responds to hair even with a constant μ value. Furthermore, when setting the μ value of the oxidizing agent aqueous solution in acidic/gut massage treatment, the μ value for the second treatment may be moved slightly lower than that for the first treatment to increase the oxidation effect. For example, the μ value of the first oxidizing agent aqueous solution is 4.50, and the μ value of the second oxidizing agent aqueous solution is about 430 to 4.20. When performing such a treatment, unless the first oxidizing agent aqueous solution is stabilized at the desired μ value, the μ value of the second oxidizing agent aqueous solution cannot be determined.

According to the standards of the Ministry of Health and Welfare, the usable μ value of an oxidizing agent aqueous solution is PH4 to PH9. It is said that an oxidizing agent aqueous solution has a strong oxidizing rate and oxidizing power in a state of pH 4 to about 95, and this is also stated in various literatures. A μ value in this range is the most stable state for hair and skin.

Conventionally available acidic perm oxidizing agents with a β value of 4.00 change to a single value of approximately 4.80 at 30°C when diluted three times with water before use, causing damage to the circulatory system (perm machine). If it is diluted about 5 times before use, it will have a value of about 5.20. Next, in order to further bring this to a desired value, an aqueous acid solution is added to adjust the value to about 4.00 to 4,80. However, during actual use, JH due to secretions from all over the body.
(according to Professor Shingo Ito's theory of isoelectric point physiology), it is nearly impossible to maintain a desired value due to the contamination of + or OH- ions.

According to the data so far, during use, the desired value often shifts to the alkaline side. For this reason, conventionally, in order to suppress the range of movement as much as possible, the oxidizing agent aqueous solution is often adjusted to a β value lower than the Ministry of Health and Welfare standard of 4.00. However, if the value is lower than PH4, chemical changes may occur and have an adverse effect on the human body.

In other words, if the value is lower than PH4, keratin tan and frizz on the skin and hair will occur due to an abnormal increase in oxidation potential, and the oxidizing agent will be susceptible to degeneration, damage, or damage due to the excessive oxidizing power of the oxidizing agent. has been shown in numerous experiments.

The present invention was made in order to solve the above problem, and its purpose is to suppress fluctuations in voice value as much as possible by the buffering effect even if some H+ or OH- ions are mixed in, and to The object of the present invention is to obtain an acidic oxidizing agent for perming that can stably perform perming oxidation treatments.

That is, in the present invention, a buffer is added to the organic acid and sodium bromate, and even if some H+ or OH- ions are mixed, the buffering effect reduces the movement width of one value by about ±0.05 to 0.1. It is possible to perform oxidation treatment by changing the amount of oxidation, and even at low concentrations, it has strong oxidizing power, has a fast reaction rate, and can oxidize reduced cysteine in hair in a stable state and recombine it into cystine bonds. The purpose is to obtain an oxidizing agent for acidic perms.

The present invention will be explained in detail below.

The oxidizing agent for acidic 4-mers according to the present invention contains an organic acid, a buffer, and sodium bromate as essential components. It consists of an aqueous solution of -14.0 to 4.9 (25°C). Organic acids include citric acid, malic acid, lactic acid, tartaric acid,
Examples include one or more of succinic acid, levulinic acid, acetic acid, asnocarboxylic acid, and glutamic acid. The content of this organic acid is 0.2 to 1.5% by weight. The reason for limiting the content to the above range is that if it is less than 0.2% by weight, the desired value cannot be maintained, and if it is less than 1.5% by weight,
This is because if the amount exceeds this amount, more oxidizing power will be generated than necessary, causing chemical irritation.

Buffers are added mainly to provide a buffer effect. As this buffer, one or two of sodium citrate, sodium malate, arginine, and sodium acetate may be used.
There are more than one species. The content of this buffer is 0.15
~2% by weight. The reason why the content is limited to the above range is that if it is less than 0.15% by weight, the buffering effect will be weak, and if it exceeds 2% by weight, it will be necessary to add more acidic substances than necessary. That is, this is because the concentration of ions becomes excessive and the influence on the hair increases. Sodium bromate is added to obtain a strong and stable oxidizing effect, and its content range is from 3.0 to 15.0% by weight.◇The reason for limiting it to this range is that if it is less than 3.0% by weight, The oxidizing effect is not sufficient (if it exceeds 15.0% by weight, the effect becomes saturated).

This oxidizing agent has the above-mentioned organic acid, buffer, and sodium bromate as essential components, but a humectant, surfactant, or silicone oil may be added and mixed as other components.

Examples of humectants include 1-3 butylene glycol, glopylene glycol, sodium lactate, sodium pyrrolidone caldate (sodium PCA), and the like. It is desirable to add this humectant at a ratio such that the concentration at the time of use is 1 to 5%.

Examples of the surfactant include cationic surfactants, double-sided surfactants, and nonionic surfactants. Also, as a silicone oil, for example, 351A.

353A (both are brand names) - By blending these, it does not leave a sticky feeling like conventional oils, and it protects the surface of the hair by making it shiny and smooth, making it less prone to scratches and protecting it from UV rays. It has the effect of It also lowers the surface tension of the aqueous solution, increasing its spreading ability and permeability to the hair. In this case, the amount of surfactant added is preferably about 0.3 to 3% by weight, and the amount of silicone oil added is preferably about 0.3 to 1% by weight.

Further, it is preferable to add a preservative of about 0.001 to 0.01% by weight.

Furthermore, this oxidizing agent has a μ value of 4.0 by adjusting the proportions of organic acid, buffer, and sodium bromate as appropriate.
0 to 4.9 (25°C).

The reason is that if the μ value of the oxidizing agent is lower than pi (4.0),
This is to prevent the oxidizing potential from increasing abnormally and the oxidizing agent having more oxidizing power than necessary, resulting in a μ value exceeding 5.00 for 4-manent (keratin acidity of skin and hair).

The oxidizing agent thus constituted is used after being diluted with water in the following manner when performing acidic/maternal treatment. For example, the undiluted solution (oxidizing agent concentration of about 6 to 15%) toocc is used after being diluted with water 2 to 5 times depending on the condition of the treatment. Alternatively, 200 cc of the undiluted solution (oxidizing agent concentration of approximately 3-8%) is used as it is or diluted 1 to 2.5 times with water depending on the condition of the treatment.

However, since the oxidizing agent of the present invention contains a buffering agent, no skill is required to set the μ value to a desired value.
In addition, it is possible to do so without using a voice meter or voice test paper.
The μ value can be set to pH 4,00, which is the standard of the Ministry of Health and Welfare.
Never go below. In addition, the oxidizing power can be stabilized by maintaining and stabilizing the μ value during storage of the stock solution and during treatment.

Moreover, since it is possible to prevent the μ value from becoming lower than 4.0 during the treatment, it is possible to solve the problem of generation of harmful substances and gases due to chemical changes.

Note that if the μ value of the oxidizing agent decreases, it may become unstable during storage, but in the present invention, since the content of the acid 1 buffer is small, this problem does not occur.

Comparative examples and examples carried out to confirm the effects of the present invention will be described below.

Comparative Example First, in order to compare with the examples described later, 100 cc of a conventional oxidizing agent aqueous solution stock solution (P) (value 4.0 (25°C), manufactured by Welfare) was diluted with 200 cc of water to prepare pi-1.
The temperature was set at 4.70-4.80°C (30°C), and 5 cc of 0.5% sodium hydroxide was added thereto. As a result, the pH was 9.4.
It became 0. Similarly, the result of adding 5 cc of 0.5 thihydrochloric acid -
It became 3,00.

On the other hand, dilute 100 ee of stock solution with 400 cc of water to make voice 5.
．． 30° C. (30° C.), and 5 cc of 0.5 thiosodium hydroxide was added thereto. As a result, the pH was 9.40. Similarly, when 5 cc of 0.5% hydrochloric acid was added, the result was -3.40.

From the above results, it can be seen that the comparative oxidizing agent has a significantly large variation in μ value.

Example 1 Citric acid was used as an organic acid, sodium citrate was used as a buffer, and sodium bromate was added to these to prepare stock solutions shown in Table 1.

This stock solution (100 ee) was diluted with 200 cc of water to prepare a 3-fold diluted oxidizing agent aqueous solution. Changes in the μ value were investigated when 5 cc of 0.5% sodium hydroxide and 5 cc of 0.5% hydrochloric acid were added to this aqueous solution. The results are shown in Table 1. Similarly, 100 cc of the stock solution was diluted with 400 cc of water.
A double-diluted oxidizing agent aqueous solution was prepared. 0.5% in this aqueous solution
Changes in μ value were investigated when 5 cc of sodium hydroxide was added and when 5 cc of 0.5% hydrochloric acid was added. The results are shown in Table 1.

As is clear from comparing the experimental results of this example and the comparative example, it can be seen that the oxidizing agent of the present invention has an excellent buffering effect.

Example 2 Using malic acid, lactic acid, conolinic acid, or tartaric acid as an organic acid, and using one or two of citric acid, arginine, and sodium malate as a buffer, sodium bromate was added to these to make a stock solution. was created.

100 cc of this stock solution was diluted with water at 200 aC, and sodium hydroxide and hydrochloric acid were added in the same manner as in Example 1 to examine changes in the β value. The results are shown in Table 2.

Example 3 A stock solution was prepared by adding a humectant along with an organic acid, a buffer, and sodium bromate, and the variation in μ value was examined in the same manner as in Example 1. The experimental results are shown in Table 3 along with the experimental conditions.

However, for A37, add 200 cc of stock solution and 100 cc of water.
In addition, we are conducting experiments. According to the Ministry of Health and Welfare, an aqueous solution of an oxidizing agent costs 200 coi as a commercial product.

A37 is made with 200 cc of stock solution.

Example 4 A stock solution was prepared by using one or two of glutamic acid, malic acid, and aspartic acid as organic acids, using arginine or sodium citrate as a buffer, and adding sodium bromate to these. Dilute this stock solution - Example 1
In the same way as above, we investigated the variation of binary values. The experimental results are shown in Table 4 along with the experimental conditions.

As is clear from Examples 1 to 4, according to the present invention, even when sodium hydroxide and hydrochloric acid are added, the fluctuation range of the μ value is 0.
It is around 0.05 to 0.15, and even if substances are secreted from the body during the actual treatment, the change in μ value can be suppressed to a small extent, ensuring that the μ value decreases to 4.00 or less. It can be prevented.

In addition, in the above example, two measuring instruments (digital meters) are used.
COM I manufactured by Electricity Rigaku Keiki Co., Ltd. (OKK)
O and l1lffC10 were used. Furthermore, the voice values shown in the table are approximately ±0.05.

Applicant's agent Patent attorney Takehiko Suzue 0 Egg・8・7
7th Patent Office Commissioner Manabu Shiga 1, Indication of the case, Japanese Patent Application No. 59-53741 2, Title of the invention: Acidic perm oxidizing agent 3, Person making the amendment: Relationship with the case, Patent applicant 4, Agent 6, Subject of amendment 7, content of amendment (1) The scope of claims is amended as shown in the attached sheet.

(2) Delete "Arginine" from page 5, line 14 of the specification.

(3) On page 12, lines 3 and 4, “Arginine,
” will be deleted.

Delete.

(6) Table 4 on page 17 is corrected as shown in the attached sheet.

2. Claims (1) Organic acid 0.2-1.5% by weight, buffering agent 0.15-15% by weight
2.0 weight factor, sodium bromate 3.0 to 15.0 weight f
An oxidizing agent for acidic and chlorinated gases with a pH of 4.0 to 4.9, including f1l.

(2) The organic acid is one or more of citric acid, phosphoric acid, lactic acid, tartaric acid, succinic acid, levulinic acid, acetic acid, aspartic acid, and glutamic acid.

The oxidizing agent for acidic gums according to claim 1, wherein the buffering agent is one or more of sodium citrate, sodium malate, and sodium acetate.

Claims (2)

[Claims] (1) Organic acid 0.2-1.5% by weight, buffering agent 0.15-15%
-4.0 to 4.9 oxidizing agent for acidic and amalgam containing 2.0% by weight and 3.0 to 15.0% by weight of sodium bromate. (2) Organic acids include citric acid, malic acid, lactic acid, tartaric acid,
A patent claim in which one or more of succinic acid, regulic acid, acetic acid, ast4ragic acid, and glutamic acid is used, and the buffer is one or more of sodium citrate, sodium malate, arginine, and sodium acetate. range 1
Oxidizing agent for acidic No.