JPH09255537A - First agent for permanent wave - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a first agent for permanent wave hardly causing damage, excellent in weaving effect slight and slight in smell. SOLUTION: This first agent for permanent wave contains one or more reducing agents selected from among a thioglocolate, cysteine and acetylcysteine, a basic amino acid and a monobasic hydroxy acid or its salt.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a first permanent wave agent for hair, which has less hair damage, an excellent waving effect, and less odor.

[0002]

2. Description of the Related Art The first agent for permanent waves is a reducing agent such as thioglycolate, cysteine and acetylcysteine, which has a function of cleaving disulfide bonds in hair, as a main agent, and ammonia, monoethanolamine and the like as alkaline agents. Is usually used. However, such a first agent for permanent wave has drawbacks such as damage to hair and strong unpleasant odor derived from thioglycolic acid and ammonia. JP-A-51-15639, JP-A-54-86635
The publication describes that by using a basic amino acid as an alkaline agent, it is possible to obtain a first agent for a permanent wave which is highly safe and has an excellent wave finishing effect. Further, in JP-A-6-298626, a hair odor eliminating agent for a permanent wave, which comprises a zinc salt of an organic acid such as glycolic acid, lactic acid, malic acid, tartaric acid or citric acid, is uncomfortable without inhibiting the wave effect. It is described that the odor is alleviated and reduced.

[0003]

However, the first agent for permanent waving, which uses a basic amino acid as an alkaline agent, reduces irritation and increases safety, but the waving effect is not sufficient and odor is also improved. I was not satisfied.

[0004]

Means for Solving the Problems As a result of various studies for solving the above problems, the present inventors have used one or more reducing agents selected from thioglycollate, cysteine and acetylcysteine as a main agent. By adding a basic amino acid and a monobasic hydroxy acid or a salt thereof to the first agent for permanent wave, it was found that the wave effect and the odor improving effect are synergistically exhibited, and the present invention was completed. It was

That is, the present invention relates to thioglycolate,
The present invention relates to a first agent for a permanent wave, which comprises one or more reducing agents selected from cysteine and acetylcysteine, a basic amino acid and a monobasic hydroxy acid or a salt thereof.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The reducing agent used in the present invention is one or more selected from thioglycolate, cysteine and acetylcysteine. Examples of the salt of thioglycolic acid include ammonium salt, sodium,
Alkali metal salts such as potassium, monoethanolamine,
Examples thereof include alkanolamine salts such as diethanolamine and triethanolamine. The compounding amount of the reducing agent is preferably 2 to 11% by weight based on the total composition. 2% by weight
If it is less than 10% by weight, the wave effect is not sufficient, and if it exceeds 11% by weight, hair damage is large.

Examples of the basic amino acid used in the present invention include lysine, ornithine and arginine, and the amount thereof is preferably 1 to 15% by weight.

The monobasic hydroxy acid used in the present invention has one carboxyl group and one hydroxy group in the molecule and is preferably glycolic acid, lactic acid or the like, and examples of the salt include ammonium salt, sodium and potassium. And the like, alkaline earth metal salts such as calcium and magnesium, alkanolamine salts such as monoethanolamine, diethanolamine and triethanolamine, and the like. The blending amount is preferably 0.1 to 5% by weight.

If necessary, other components can be added to the first agent for permanent wave of the present invention within a range that does not impair the effects of the present invention. Examples of such components include cationic surfactants, anionic surfactants, amphoteric surfactants, nonionic surfactants, urea, ammonia, monoethanolamine, higher alcohols, protein hydrolysates, acidic amino acids, Neutral amino acids, preservatives,
Colorants, fragrances, etc. may be mentioned. Moreover, pH is 4.5-9.
It is preferably used within a range of about 5.

[0010]

EXAMPLES The present invention will be described in more detail with reference to the following Examples, but it should not be construed that the present invention is limited thereto.

A first agent for permanent wave having the composition shown in Table 1 was prepared, and the wave effect and odor were compared by the following methods.

Wave effect A hair bundle of 50 hairs was wound around and fixed on a rod with a constant tension in a spiral shape (pitch: 10 mm). 5 ml of the first agent for permanent wave was applied and left in a constant temperature bath at 35 ° C. for 15 minutes. After washing with water, 5 ml of the second agent for permanent wave, which was composed of a 5% sodium bromate aqueous solution, was applied, and after 7 minutes, 5 ml of the same second agent was applied again, and after 15 minutes, the hair bundle was removed from the rod. 5 to 300 ml of water at 40 ° C
After soaking for a minute, it was dried. The average wavelength L (mm) of hair was measured, and the wave efficiency was calculated by the following formula. Wave efficiency (%) = (10 / L) × 100 Further, the degree of waving was visually evaluated by 10 panelists. The evaluation was based on Comparative Example 1 when 8 or more people were good (⊚), when 6 to 7 people were good (◯), when 4 to 5 people were good (△),
The case where three or less persons were good was evaluated as (x).

Odor test The panel was evaluated by sensory evaluation by 10 panelists. The evaluation was based on Comparative Example 1 when 8 or more were good (⊚), when 6 to 7 were good (∘), when 4 to 5 were good (Δ), 3 The case where the following was determined to be good was (x). As is clear from Table 1, the first agent for permanent wave of the present invention has an excellent weeping effect and little odor.

[0014]

[Table 1]

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kouichi Higuchi 1-1, Suzuki-cho, Kawasaki-ku, Kawasaki-shi, Kanagawa Ajinomoto Co., Inc. Central Research Laboratory (72) Inventor Hiroshi Abe 1 Suzuki-cho, Kawasaki-ku, Kawasaki-shi, Kanagawa -1 Central Research Institute of Ajinomoto Co., Inc.

Claims (2)

[Claims] 1. A first permanent wave wave containing one or more reducing agents selected from thioglycollate, cysteine and acetylcysteine, a basic amino acid and a monobasic hydroxy acid or a salt thereof. Agent. 2. The first agent for permanent wave according to claim 1, wherein the monobasic hydroxy acid is glycolic acid.