JP2012236790A - Permed hair treatment method and hair conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a permed hair treatment method which reduces a remaining smell after hair perming treatment.SOLUTION: The permed hair treatment method is characterized in that the cystine coupling of hair is cut by lactone thiol, then, the cut cystine coupling is recoupled by using an oxidizer, and after that, post-treatment is applied by using an organic acid zinc aqueous solution. The remaining smell after the hair perming treatment is reduced by applying the post-treatment using the organic acid zinc aqueous solution produced by making oxide zinc and an organic acid aqueous solution react with each other.

Description

  The present invention generally relates to a hair perm treatment method, and more particularly, to a hair perm treatment method improved so that the odor after the perm treatment can be efficiently erased. The invention also relates to a hair conditioner for use in such a method.

  Perms include permanent waves that give the hair a wave and straightening hair that straightens the hair. Describing the binding of hair, the keratin protein constituting the hair has bonds such as cystine bond (SS bond), ionic bond, hydrogen bond, and peptide bond as shown in FIG. A cystine bond is a bond peculiar to keratin protein, is cleaved with a reducing agent, and returns to the original bond with an oxidizing agent. An ionic bond is a bond that attracts positive and negative properties. Hydrogen bonds are bonds that are cleaved by water and recombine when dried. A peptide bond is a bond that connects amino acids together to create a protein. Of these bonds, cystine bonds play an important role in perms.

  As shown in FIG. 2, the basic principle of the permanent is to cleave the cystine bond by the reducing action of one agent and to recombine the cystine bond cleaved by the oxidizing action of two agents.

  As the oxidizing agent, sodium bromate and hydrogen peroxide are used. Although thioglycolic acid and cysteine have been used as the reducing agent in permanent wave preparations and hair straighteners, recently there has been a color boom, and using them on colored hair will cause damage to the hair. The problem of giving and not getting a permanent perm has arisen. Accordingly, cysteamine, thioglycerin, and lactone thiol have been used as permanent agents for color hair as reducing agents other than thioglycolic acid and cysteine. In particular, lactone thiol is most often used in the acidic region where the pH is weak and has a merit that it is less damaged and is often used.

  However, lactone thiol has a problem that the diffuse odor at the time of treatment is strong and the odor spreads in the salon. In addition, there is a problem that a residual odor remains in the hair and gives an unpleasant feeling to the surroundings in terms of odor.

  The object of the present invention is to solve the above-mentioned problems, and is an improved hair perm treatment method using a lactone thiol as a reducing agent so as to reduce the residual odor after the perm treatment. Is to provide.

  Another object of the present invention is to provide a hair conditioner for use in such a hair perm treatment method.

  In the present invention, the cystine bond of hair is cleaved with lactone thiol, and then the cleaved cystine bond is recombined with an oxidant, and then the aqueous zinc acid solution is reacted with the aqueous organic acid solution. The present invention relates to a method for treating the perm of hair.

  According to the present invention, it has been found that the residual odor after the permanent treatment is reduced by post-treatment with an aqueous zinc acid acid solution obtained by reacting zinc oxide with an organic acid aqueous solution.

  It is preferable to use butyrolactone thiol as the lactone thiol. Butyrolactone thiol has a molecular weight of 118.15, a boiling point of 94 ° C./0.3 kPa, and a vapor pressure of 1.82 Pa (25 ° C.).

The post-treatment with the organic acid zinc aqueous solution is performed, for example, by spraying the hair after permanent treatment with a spray. The residual odor after the perm treatment was due to the odor of the remaining lactone thiol, but this was reduced by the post-treatment with the organic acid zinc aqueous solution. Although the mechanism is not clear, lactone thiol has been converted to another substance with low vapor pressure using organic acid zinc as a catalyst. For example, when butyrolactone thiol is used as the lactone thiol, two molecules of butyrolactone thiol are brought close to each other by the action of zinc as shown in the following reaction formula [Chemical Formula 1], and the lone pair of mercapto groups is It is considered that the carbonyl ring was opened by attacking the carbonyl carbon and a dimer was formed. When the dimer is formed, the amount of mercapto group (—SH), which is the element of odor, is halved, and the molecular weight is 118.15 × 2 = 236.3, the boiling point is higher, and the vapor pressure is lower. These actions are synergistic and the odor is thought to have decreased.

  The zinc oxide may include zinc oxide nanoparticles having a diameter of 50 nm to 70 nm. It was recognized that the effect of reducing residual odor increased by using zinc oxide nanoparticles. It is considered that the use of nanoparticles increases the specific surface area and increases the catalytic effect.

  On the other hand, even if an organic acid zinc aqueous solution was made using local zinc oxide, a considerable effect was obtained.

  The organic acid preferably contains lactic acid and / or citric acid. These are easy to obtain and safe for the human body.

  The organic acid zinc aqueous solution preferably contains 2 to 5% by weight of zinc oxide. When zinc oxide is 2% by weight or less, it is difficult to obtain a desired effect. Considering the solubility and production of zinc oxide, it is preferably 5% by weight or less.

  The post-treatment step is performed at about 40 ° C. Although the perm has a blowing process, it was confirmed that the effect of reducing the residual odor increased when treated with a zinc acid aqueous solution (treatment) and blown at 40 ° C. This is because the above reaction is promoted.

  When using the said zinc oxide nanoparticle, it is preferable to contain the zinc oxide nanoparticle of diameter 50nm -70nm (1 nano is 1 billionth). It is also advantageous that ultrafine zinc oxide is well dispersed in organic acids.

  The hair conditioner according to another aspect of the present invention includes an organic acid zinc aqueous solution obtained by reacting zinc oxide and an organic acid aqueous solution.

  According to the present invention, it has been found that the residual odor after the permanent treatment is reduced by post-treatment with an aqueous zinc acid acid solution obtained by reacting zinc oxide with an organic acid aqueous solution.

It is the figure which showed the coupling | bonding of hair. It is the figure which showed the principle of a permanent.

  In the hair perm treatment method in which the cystine bond in hair is cleaved with lactone thiol and then the cleaved cystine bond is re-bonded with an oxidizing agent, the purpose of reducing the residual odor after the perm treatment is unreacted. Lactone thiol was realized by post-treatment with an aqueous zinc acid acid solution obtained by reacting zinc oxide and an aqueous acid solution.

When lactic acid and citric acid were selected as the organic acids, it was found that Table 1 shows preferred examples of the organic acid zinc aqueous solution.

  In the formulation examples shown in Table 2 below, an organic acid zinc aqueous solution was prepared. This was filled in a spray container as a deodorant. The hair bundle was then placed in a cup. About 1 g of a butyrolactone thiol permanent drug was applied to the hair bundle using a spoid. Then, the organic acid zinc aqueous solution of the said mixing example put into the spray container was sprayed on the hair | bristle bundle by one push (0.3-0.4g), and the deodorizer was apply | coated. Covered and left for 10 minutes. The odor of the cup immediately after application of the deodorant was sniffed, and the degree of deodorization was evaluated. The score was 1 to 5 (1: odorless to 5: bad odor). Relative evaluation was made with the odor when no deodorant was used as 5 points.

As a result, the evaluation was 2.5.

In this example, the deodorant according to the present invention is incorporated into a hair conditioner. Table 3 shows formulation examples. C was added to B phase, and it stirred and mixed to 80 degreeC. Phase A was stirred and mixed to 80 ° C. While stirring with a homomixer (5000 rpm) at 80 ° C., Phase A was slowly added to Phase B to which C was added. When all were added, stirring was continued for 5 minutes while maintaining at 80 ° C. Then, it cooled to room temperature, stirring. The obtained hair conditioner functioned as a deodorant, and the hair was moistened by the high permeability and damage repair function of Pericea.

  In the above examples, the case where lactic acid or citric acid is used as the organic acid is exemplified, but the present invention is not limited to this, and gluconic acid, acetic acid, tartaric acid, malic acid and the like can also be used.

  It should be understood that the embodiments disclosed herein are illustrative and non-restrictive in every respect. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  According to the present invention, it is possible to reduce the residual odor after the permanent treatment.

Claims (7)

  Cleaving the cystine bond of the hair with lactone thiol, then rebinding the cleaved cystine bond with an oxidizing agent, and then post-treating with an aqueous zinc acid acid solution obtained by reacting zinc oxide with an organic acid aqueous solution. A method for perm treatment of hair.   The hair post treatment method according to claim 1, wherein the post-treatment includes spraying the hair toward the hair using a spray filled with the aqueous organic acid zinc solution.   The hair post treatment method according to claim 2, wherein the post-treatment further includes a step of heating the hair sprayed by the spray to about 40 ° C.   The perm treatment method for hair according to any one of claims 1 to 3, wherein the aqueous zinc acid solution contains 2 to 5% by weight of zinc oxide.   A hair conditioner comprising an organic acid zinc aqueous solution obtained by reacting zinc oxide and an organic acid aqueous solution.   The hair conditioner according to claim 5, wherein the zinc oxide includes zinc oxide nanoparticles having a diameter of 50 nm to 70 nm.   The hair conditioner according to claim 5 or 6, wherein the organic acid includes lactic acid and / or citric acid.