JPH078775B2 - First agent for permanent wave - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a first agent for permanent wave, which causes less damage to hair, has a strong wave forming power, and has a peculiar odor.

[Conventional technology]

Conventional permanent wave (hereinafter simply referred to as perm)
For the treatment, the main agent is a reducing agent such as thioglycolic acid and cysteine, and an alkaline agent such as ammonia, monoethanolamine and ammonium hydrogencarbonate is added to adjust the pH to 9.6 or less. Is swelled and softened, and then oxidatively fixed with a second agent of a solution containing an oxidant such as bromate and hydrogen peroxide as a main component.

However, when the alkaline first agent is applied, the hair swells greatly, and the destruction and outflow of proteins, amino acids, and other moisturizing components increase, resulting in so-called dry hair, which lowers the hair strength and feels and combs. However, there is a drawback that the peeling of the hair pellicle, split ends, cut hair, etc. becomes remarkable.

Therefore, recently, an acidic permanent wave agent (hereinafter simply referred to as a perm agent) is often used to apply a perm while minimizing damage to hair. However, since all commercially available acidic perming agents have a very weak wave-forming power, it is necessary to perform operations such as tightly winding using a lot three to four steps thinner than the usual lot used when using an alkaline perming agent. However, there is a drawback that the procedure is complicated and takes a long time.

Further, in general, the acidic perming agent has a problem that the generation of hydrogen sulfide is significantly larger than that of a normal alkaline perming agent during storage and the odor is strong.

[Problems to be Solved by the Invention]

The present invention improves the drawbacks of the conventional alkaline and acidic perming agents as described above, and provides an excellent permanent waving agent having a strong wave forming power without damaging the hair and having less odor. Aimed at.

[Means for Solving the Problems]

Such an object of the present invention is to replace thioglycolic acid with the first agent of the perming agent that has been conventionally used during the perming treatment.
Alkaline solution A containing 2 to 10 w / v% of one or more reducing agents selected from thioglycollate, cysteine and cysteamine and 1 to 4 w / v% of carbonate, and at least acid or salt It can be achieved by using the first agent for permanent wave, which is characterized in that it is composed of an acidic solution B containing one of them.

Especially, the mixture of the solution A and the solution B so that the pH becomes acidic gives good results.

The reducing agent used in the solution A of the first agent for permanent wave of the present invention comprises one or more selected from thioglycolic acid, thioglycolate, cysteine and cysteamine. The thioglycolate may be ammonium thioglycolate, sodium thioglycolate, potassium thioglycolate, thioglycolic acid monoethanolamine, thioglycolic acid diethanolamine, thioglycolic acid triethanolamine and the like. The amount of such reducing agent is 2
It is preferably in the range of -10 w / v%. If it is less than 2w / v%, the wave forming power is not sufficient, and if it exceeds 10w / v%, the hair is greatly damaged.

The carbonate salt used in the solution A of the first agent for permanent wave of the present invention may be ammonium carbonate, ammonium hydrogen carbonate, sodium carbonate, sodium hydrogen carbonate, guanidine carbonate and the like. Above all, ammonium hydrogen carbonate, from the point that hair damage is low and stability is high,
Guanidine carbonate is preferred. The amount of such a carbonate compounded is 1
It is preferably in the range of 4 w / v%. If it is less than 1 w / v%, the wave-forming power is not sufficient, and if it exceeds 4 w / v%, the carbonate decomposes and foams remarkably when the pH is adjusted to acidic by mixing with the solution B, which is inconvenient for handling. is there.

The solution A of the first agent for permanent wave of the present invention needs to be alkaline. The alkalinity is preferably weakly alkaline, and particularly preferably pH is less than 9. If the pH is 9 or more, it is difficult to mix it with the solution B to adjust the pH to acidic, and if the pH is 7 or less, the storage stability becomes poor.

The acid used in the solution B of the first agent for permanent wave of the present invention may be citric acid, malic acid, lactic acid, aspartic acid, glutamic acid, phosphoric acid, hydrochloric acid or the like. Further, the salt may be a sodium salt, potassium salt, ammonium salt or the like of the above acids. These acids and salts may be used together in an appropriate ratio, but the pH of solution B is
Must be acidic.

The first agent for permanent wave of the present invention comprises the solution A and the solution B, and is used by mixing so that the pH is acidic, preferably slightly acidic when used. Particularly preferable pH is 6.5 or more and less than 7, and when the pH is too low, the carbonate in the mixed solution is decomposed and foaming becomes severe,
Conversely, on the alkaline side, hair damage cannot be ignored.
The mixing ratio of the solution A and the solution B in the present invention is such that the pH after mixing is 6.5 depending on the amounts of the components contained in each solution.
The number is selected to be less than 7, but it is desirable to determine in advance by a preliminary test or the like.

The first agent for permanent wave of the present invention contains the other components, such as cationic, anionic, amphoteric and nonionic, if necessary, in the solution A or the solution B as long as the effects of the present invention are not impaired. A high-molecular or low-molecular surface active agent such as urea, a urea, a higher alcohol, a protein hydrolyzate, a hair-growing agent such as an amino acid, an antiseptic, a coloring agent, a fragrance and the like can be added and blended.

[Example 1] Hereinafter, the present invention will be specifically described with reference to examples, but the present invention is not limited to these examples.

A first agent for permanent wave was prepared according to the formulation shown in Table 1.

Also, as the second agent, sodium bromate was added per 100 ml of 7
An aqueous solution containing g was prepared.

Using these first and second agents, a wave efficiency test in a perm treatment, a surface friction feeling test, a hair strength test,
The sensory evaluation test and the hydrogen sulfide generation amount measurement test were carried out by the following methods, and the results are summarized in Table 2.

(1) Wave efficiency test 20 hairs (untreated Chinese hair) washed with a 1% aqueous solution of sodium lauryl sulfate are wrapped around a wave device of the Kilby method. Next, add wave equipment to the first agent (liquid temperature 25 ° C) 1
After soaking for 1 minute, the solution was taken out from the solution, placed in another empty container and sealed, and this container was left in a constant temperature bath at 40 ° C. for 15 minutes.
Then, the wave device was taken out, washed with water, immersed in the second agent for 10 minutes, and further washed with water. The hair thus treated was removed from the wave device and the wave efficiency was measured.

(2) Surface friction test 15 cm long and 2 g weight hair is fixed at the root side with an adhesive and the width
A hair bundle of 3 cm was washed with a 1% aqueous solution of sodium lauryl sulfate, dipped in the first agent (30 ° C.) for 15 minutes, washed with water, then dipped in the second agent for 10 minutes, and then naturally dried.

The sample hair thus obtained was manufactured by Kato Tech Co., Ltd.
A KE-SE friction tester was used to measure the average friction coefficient (MIU) and the average deviation of the friction coefficient (MMD). The larger the MIU value, the more difficult it is to slip, and the larger the MMD value, the more rough it is.

(3) Hair strength test The breaking strength (kg / mm ² ) of the sample hair treated in (2) was measured using a tensile tester (Tensilon UMT-2-5HR manufactured by Toyo Baldwin Co., Ltd.), and the breaking strength of untreated hair was measured. The relative value of the breaking strength in each perm treatment when the value was 100 was defined as the hair strength.

(4) Sensory evaluation test Using the sample hair treated in (2), touch and combing were evaluated on a 5-point scale.

Where 5 is very good, 3 is normal and 1 is very bad.

(5) Hydrogen sulfide generation rate measurement test Put 50 ml of the first agent in a 100 ml container, seal it, leave it at room temperature for 2 days, and measure the concentration of hydrogen sulfide in the gas accumulated in the upper part of the container. It measured using the instrument.

The results of Table 2 show that the first agent for permanent wave of the present invention has almost the same wave-forming power as that of the alkaline permanent agent, and has the same surface friction feeling as that of the acidic permanent agent, and has a small hair size. It can be seen that there is little damage to the skin, and the hair strength, feel and combing of the treated hair are similar to those of the acidic perm agent, and there is little damage to the hair.

On the other hand, the first agent for permanent wave of the present invention does not generate a large amount of hydrogen sulfide even in a mixed liquid, and since the solution A and the solution B are separately stored, the problem of storage stability is solved.

[Example 2] Using solution A and solution B of the first agent having the formulation shown below, and the second agent, the hair was actually permed.

(Formulation 5) Solution A of the 1st agent A Ammonium thioglycolate 6.8 g Adjusted with ammonia water pH 7.6 Ammonium hydrogen carbonate 3.0 g Emulsifier 3.0 g Polychlorinated dimethyl methylene piperidinium 0.20 g Perfume Suitable amount Adjust the total amount with purified water 85 ml Solution B of 1 agent Sodium dihydrogen phosphate 1.7g Preservative proper amount Adjust the total amount with purified water 15ml Second agent Sodium bromate 7.0g Phosphate 0.6g Polyoxyethylene lauryl sulfate 0.9g Preservative proper amount Total with purified water Adjust 100 ml of the solution of the 1st agent (pH)
While applying 6.8) to hair, the hair was wound in a lot, left for about 15 minutes and then washed with water.

Then, the second agent was applied, and after leaving it for 10 minutes, the lot was removed and thoroughly washed with water.

The reaction odor during perm treatment was extremely low, and the hair was supple and elastic, and a firm wave was obtained. Moreover, the touch and combing were very good, and almost no damage to the hair was recognized.

[Effects of the Invention] The first agent for permanent wave of the present invention has a two-part constitution of an alkaline solution A and an acidic solution B, has extremely good storability, and is mixed so as to be weakly acidic when used. Less hydrogen sulfide is generated during perm treatment. And although the wave-forming power is almost the same as that of the alkaline perm agent, the hair is less damaged and has the same characteristics as the acidic perm agent.

Claims (2)

[Claims] 1. A thioglycolic acid, a thioglycolic acid salt,
1 or 2 selected from cysteine and cysteamine
A permanent solution comprising an alkaline solution A containing 2 to 10 w / v% of one or more reducing agents and 1 to 4 w / v% of a carbonate, and an acidic solution B containing at least one of an acid and a salt. First agent for wave. 2. A thioglycolic acid, a thioglycolic acid salt,
1 or 2 selected from cysteine and cysteamine
A mixture of an alkaline solution A containing 2 to 10 w / v% of one or more reducing agents and 1 to 4 w / v% of a carbonate, and an acidic solution B containing at least one of an acid and a salt, and having a pH of The first agent for permanent wave according to claim 1, which is acidic.