JPS6148805B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a novel hair treatment agent. More specifically, the present invention relates to a novel hair treatment agent that allows stable permanent waving or hair straightening without damaging the hair. Until now, the so-called cold wave method, which can be applied at room temperature, first treats the hair with a first solution containing a reducing agent, thioglycolate, etc., and then cuts the cystine crosslinks in keratin molecules.
After shaping into a predetermined shape, it is treated with a second liquid containing an oxidizing agent, a neutralizing agent, potassium bromate, hydrogen peroxide, etc. to form new bonds again. However, this method involves chemically destroying the keratin molecules that make up the hair;
Hair is more or less damaged, and if the treatment conditions are not appropriate, there is a risk of hair breakage or hair loss. A further disadvantage is that the sulfur compounds used in this method emit a characteristic foul odor, which often causes discomfort to the user. The present inventors have conducted extensive research in order to improve the drawbacks of conventional hair waving agents and to develop a hair waving agent that is harmless to the human body and can effectively and stably apply permanent waves. As a result, the inventors discovered that the object could be achieved with a hair waving agent having a novel composition that forms permanent waves with a new mechanism of action that is completely different from conventional ones, and thus the present invention was completed. That is, the present invention contains (a) 0.5 to 2% by weight of acidic sulfites or sulfites, 1 to 10% by weight of urea, 1 to 10% by weight of di- or trialkanolamines, and 1 to 3% by weight of water-soluble neutral salts. (b) 0.5 to 2.0% by weight of a crosslinking compound having a nitrogen-containing heterocycle substituted with two or more halogen atoms, 0.5 to 2.0% by weight of a nonionic surfactant, and a di- or trialkanol. The present invention provides a hair waving agent comprising the present treatment agent containing 1 to 5% by weight of an amine and 1 to 3% by weight of a water-soluble neutral salt. The pretreatment agent in the hair waving agent of the present invention is:
This treatment agent relaxes the three-dimensional structure of keratin molecules and makes it easier to form the desired curl.This treatment agent reacts with the thiol groups and amino groups in keratin molecules that occur when cystine is cut, and causes damage between keratin molecules. This is to form crosslinks and fix curls. The pretreatment agent must contain four components as essential components: acidic sulfite or sulfite, urea, di- or trialkanolamine, and neutral salt. Among these, acidic sulfite or sulfite is a necessary component to cut some of the cystine crosslinks in keratin molecules that make up hair and make it easier to shape the hair. For example, acidic sulfite or sodium salt of sulfite, Alkaline salts such as potassium salts and ammonium salts are preferred. The acid sulfites are used in concentrations of 0.5-2% by weight. If this amount is less than 0.5% by weight, the effect of making hair easier to shape will be insufficient, and if it exceeds 2% by weight, the cystine crosslinks between keratin molecules will be broken too much, resulting in damage to the hair. Appropriate. Urea also causes swelling of the hair tissue and increases the hydration of keratinized keratin, making it easier for crosslinking compounds to react during the subsequent main treatment, and stabilizing the pretreatment agent. It is added at a concentration of 1 to 10% by weight, preferably 5 to 8% by weight. If this amount is less than 1% by weight, the above effects will be insufficient, and if this amount exceeds 10% by weight, dehydration will occur, which will even reduce the pretreatment effect, which is not preferable. Next, di- or trialkanolamine acts as a buffer for the pre-treatment agent and is effective in removing dirt from the hair, especially polyvalent cations such as iron ions and calcium ions. It also has the effect of stabilizing hair swelling and crosslinking. Examples of this include dialkanolamines such as diethanolamine, dipropanolamine, dibutanolamine, triethanolamine, tripropanolamine,
Mention may be made of trialkanolamines such as tributanolamine, but particularly preferred is di- or triethanolamine. This one is 1
It is used at a concentration of ~10% by weight, preferably 3-7% by weight. If this amount is less than 1% by weight, the above effect will be insufficient, and if it exceeds 10% by weight, it will undesirably reduce the pretreatment effect or damage the hair. Furthermore, water-soluble neutral salts are added to lower the surface potential of the hair and make it easier for crosslinking compounds to contact keratin molecules, such as sodium sulfate, potassium sulfate, potassium sulfite, sodium bicarbonate, Sodium chloride, potassium chloride, sodium phosphate, etc. are used, but sodium sulfate is particularly preferred. This neutral salt is 1
It is added at a concentration of ~3% by weight. In addition, a surfactant may be added to the pretreatment agent as desired. On the other hand, this treatment agent contains, as essential components, a crosslinking compound having a nitrogen-containing heterocycle substituted with at least two halogen atoms, a nonionic surfactant, a di- or trialkanolamine, and a water-soluble neutral It is necessary that the four ingredients of salt are included.
This crosslinking compound forms crosslinks between adjacent keratin molecules and plays the role of fixing the shape of the shaped hair. This crosslinking compound includes a pyridine ring, a pyrimidine ring, a pyridazine ring,
A heterocycle containing a nitrogen atom, such as a triazine ring, a quinoline ring, an isoquinoline ring, a quinoxaline ring, a purine ring, a tetrazine ring, or a hydride thereof, especially a six-membered ring, and the heterocycle has two or more halogen atoms. For example, it is necessary to have a structure in which a chlorine atom or a bromine atom is substituted. The substitution position of each halogen atom may be any of the ortho, meta, and para positions, with the meta position being particularly preferred. This seems to be because the distance between the reactive groups when forming crosslinks between keratin molecules is similar to the distance between the meta-positions of nitrogen-containing heterocycles. Examples of this crosslinking compound include dichloroisocyanuric acid, cyanuric chloride, dichlortriazine compounds, dichloroquinoxaline compounds, trichloropyrimidine compounds, dichloropyrimidine compounds, dichloropyridazone compounds, and dichloroquinoxaline compounds. Examples include chloroquinoline compounds.
This crosslinking compound combines its halogen atom with reactive groups in the amino acids constituting the keratin molecule, such as the thiol group of cysteine, the imide group of the imidazole ring of histidine, and the side chain amino group of lysine.
It reacts with the hydroxyl group and terminal amino group of serine to form a crosslink. This crosslinking compound is used in a concentration of 0.5 to 2% by weight. If this amount is less than 0.5% by weight, the fixation to maintain the shape of the hair will be insufficient, and if it exceeds 2% by weight, the degree of freedom between keratin molecules will be lost, increasing the strength of the hair. However, this is not preferable because the elongation decreases and flexibility is lost. In addition, the nonionic surfactant is an auxiliary agent that gives mobility to the shaped hair and allows it to react uniformly, such as higher fatty acid glycerin ester, higher fatty acid glycol ester, higher fatty acid sorbitan, or Preferred are mannitan ester, polyolefin oxide condensates of higher fatty acids or higher alcohols, and the like. This nonionic surfactant is added at a concentration of 0.5-2.0% by weight. If this amount is less than 0.5% by weight, the effect will be insufficient, and if it is used in an amount greater than 2.0% by weight, it will be uneconomical since there will be no particular merit in terms of effect. The di- or trialkanolamine and the water-soluble neutral salt are added for the same purpose as in the case of the pretreatment agent, and the same compounds as those listed for the pretreatment liquid are used. Each of these components is 1
It is used at a concentration of ~3% by weight. Urea can also be added to this treatment agent if necessary. The hair treatment agent of the present invention is usually formulated in liquid form, but if necessary, sodium alginate, carboxymethyl cellulose, liquid paraffin, lanolin, wax, etc. may be added to form a cream. In addition, in both the pretreatment agent and the main treatment agent, auxiliary additives commonly used in hair treatment agents such as pigments and fragrances can be added. To apply permanent waves with the hair treatment agent of the present invention, the hair is wound into a roll and heated between room temperature and 55°C.
After soaking in the pre-treatment solution and treating for 10 to 20 minutes, take it out, wash it briefly with water, and then leave it at room temperature or
Immerse in the main treatment solution at 55℃ and treat for 10 to 20 minutes. Next, the rolls are removed, washed with water, and dried to obtain the desired hairstyle. In this way, the hair treatment agent of the present invention can effectively wave and straighten hair without damaging hair, causing hair breakage, or hair loss, unlike conventional permanent wave solutions. can be applied. Next, the present invention will be explained in more detail with reference to Examples. Example 1 A pretreatment liquid and a main treatment liquid were prepared according to the following formulations. Pretreatment liquid Sodium acid sulfite... 2.0 parts by weight Urea... 5.0 parts by weight Triethanolamine... 5.0 parts by weight Sodium sulfate... 3.0 parts by weight Anionic surfactant... 0.5 parts by weight Color and fragrance... Appropriate amount Water... 100 parts by weight Processing liquid Sodium dichloroisocyanurate 0.5 parts by weight Polyoxyethylene sorbitan monolaurate... 2.0 parts by weight Triethanolamine... 5.0 parts by weight Color and fragrance... Appropriate amount Water... Until the amount is 100 parts by weight. Apply the pre-treatment liquid to the hair,
A part of it was rolled into a rod and kept at about 40℃ for 20 minutes, then this treatment solution was applied, and then the same temperature was kept for 20 minutes.
Hold for a minute. Next, remove the rod and wash thoroughly with shampoo to form beautiful and strong hair waves. This wave withstands everyday hair and does not fade even after 6 months or more. Example 2 A pretreatment liquid and a cream for main treatment were prepared according to the following formulations. Pretreatment liquid Sodium acid sulfite... 2.0 parts by weight Urea... 5.0 parts by weight Triethanolamine... 5.0 parts by weight Sodium sulfate... 1.0 parts by weight Color and fragrance... Appropriate amount Water... Up to 100 parts by weight Main processing liquid dichlorotriazine type Compound... 0.5 parts by weight polyethylene oxide alkyl ether...
1.0 parts by weight Triethanolamine... 5.0 parts by weight Urea... 5.0 parts by weight Sodium alginate... 2.5 parts by weight Lanolin... 50.0 parts by weight Colorants and fragrances... Appropriate amount Water... Until the volume reaches 100 parts by weight The pretreatment liquid obtained in this manner When hair was waved in the same manner as in Example 1 using this treatment cream, similarly good hair waves were obtained. Reference example 1 Hair collected from the same part of the same person with a length of 16 cm
The treated hair is cut into two hairs, dipped in a pre-treatment agent, wrapped around a rod with a diameter of 6 mm, treated with this treatment agent, rinsed with lukewarm water and air-dried. The hair was soaked in warm water at ℃ for 20 minutes with occasional stirring, then taken out, allowed to air dry, and returned to use as test hair.The strength of each wave was evaluated using a 10-point scale. The results obtained using the processing agents of Examples 1 and 2 are shown in the following table.

[Table] *For the wave strength, 10 is the maximum and 1 is the minimum.
A strength of 5 or more is such that there is no problem in practical use. Reference Example 2 Two types of hair collected from two different people were used: untreated hair (A), hair treated according to Example 1 (B), and hair treated according to Example 2 ( The strength and elongation of 50 pieces of each of C) and those treated with a commercially available two-component permanent wave agent (D) were measured using a Tensilon tensile tester. As a commercially available two-component permanent wave agent, Highness Cold Wave emulsion manufactured by Arimi Co., Ltd. and having the following composition was used. First liquid: An aqueous emulsion containing 5% by weight of ammonium thioglycolate (calculated as thioglycolic acid), with a pH of 8.8 and an alkalinity of 4.1. Second liquid: An aqueous emulsion containing 3% by weight of sodium bromate, with a pH of 4.6 and an oxidizing power of 4.3. The results are shown in FIGS. 1 and 2. As is clear from these figures, the strength of the specimens treated with the treatment agent of the present invention tends to increase and the elongation tends to decrease compared to the untreated specimens. Also,
It is observed that the treated commercially available products tend to have lower strength and higher elongation than untreated products. In this way, when treated with the treatment agent of the present invention,
Strength increases due to the formation of crosslinks between keratin molecules in the hair, while elongation tends to decrease because crosslinks between keratin molecules reduce the degree of freedom of the molecules.

[Brief explanation of the drawing]

FIGS. 1 and 2 are graphs showing strength-elongation curves for untreated hair, hair treated with the treatment agent of the present invention, and hair treated with a commercially available permanent waving agent.

Claims (1)

[Claims] 1 (a) A pretreatment agent containing 0.5 to 2% by weight of acidic sulfite or sulfite, 1 to 10% by weight of urea, 1 to 10% by weight of di- or trialkanolamine, and 1 to 3% by weight of water-soluble neutral salt; , (b) A crosslinking compound having a nitrogen-containing heterocycle substituted with two or more halogen atoms
0.5-2.0% by weight, nonionic surfactant 0.5-2.0
A hair treatment agent comprising the present treatment agent containing 1 to 5% by weight of di- or trialkanolamine and 1 to 3% by weight of a water-soluble neutral salt.