JP5875303B2 - Hair cosmetics - Google Patents

Description

  The present invention relates to a hair cosmetic used for wave or straight or curly hair correction in a hairdressing salon or the like, and for use in home hair, such as comb hair or bed rest. More specifically, in the present invention, the reducing agent and tannin are blended at the same time, and when they are used, the damage to the hair is reduced, and the shape deformation and feel improvement effect due to the bond conversion of fibers, hair, etc. can be easily performed in a short time. The present invention relates to a hair cosmetic composition.

  Conventionally, for hair shape conversion, wave set, straight, etc., it is common to cut and recombine various bonds such as hydrogen bonds, salt bonds, disulfide bonds, peptide bonds between amino acids present in hair In particular, it is known that it is effective to chemically break and recombine disulfide bonds in order to maintain the wave of hair.

  For the cleavage of disulfide bonds, the first agent mainly containing a reducing agent such as thioglycolic acid, cysteine, acetylcysteine, cysteamine, thioglycerin, thiolactic acid, butyrolactone thiol or salts thereof is used as a reducing agent. After partially reducing and softening the disulfide bond (-S-S-) of keratin, it is cleaved with a second agent mainly composed of an oxidizing agent having strong oxidizing power such as bromate and hydrogen peroxide. The resulting disulfide bonds are recombined to change the shape of the hair, forming waves and straights.

  Specifically, in the perm process, when the first agent containing a reducing agent is applied while the hair is lightly moistened with water and wound around a lot or the like, the disulfide bond is cut and the hair follows the shape of the lot. . After that, when oxidized with a second agent containing an oxidizing agent, a technique has been put into practical use in which disulfide bonds are recombined while maintaining the shape of a lot and the shape is maintained (Patent Document 1).

  Basically, the same principle is used to use a reducing agent and an oxidizing agent. When straightening the hair, a physical force is applied using a comb or a trowel, etc. It has become.

  However, if the treatments such as permanent wave, straight set and curly hair straightening as described above are repeated, peptides in the hair will flow out due to strong chemical action by the reducing agent and oxidizing agent, and further, the hair tissue and microstructure In many cases, damage or modification can cause deterioration of the elasticity or strength of the hair.

  In addition, after the first agent's reaction with the reducing agent, after washing with intermediate water on a shampoo table, applying the second agent's oxidizing agent and allowing it to stand for 10 to 15 minutes is also accompanied by great pain for the patient.

  On the other hand, although a one-bath type permanent agent containing sulfite and the like that does not require the second agent has been proposed (Patent Document 2), this is in a state where the hair is wound in a lot after the first agent treatment. Rinse with water, wash away the first agent, and leave the hair wrapped in a lot for natural standing for 10 to 20 minutes to oxidize with air. Not. Furthermore, there is a drawback that hair damage is increased due to insufficient air oxidation.

  In addition, the current permanent wave, straight set, and hair straightener, which are based on a highly concentrated mercaptan-based reducing agent with strong odor, are devised to mask unpleasant odors with perfumes. Is still inadequate.

  At the same time as the permanent treatment, one or more tannic acids and tannin compounds are used as the first agent of the permanent solution, an oxidizing agent such as peroxide is used as the second agent, and an iron compound is used as the coloring aid. Although a method capable of performing hair dyeing treatment is disclosed (Patent Document 3), it is not an easy solution for a short time and is not an essential solution for suppressing hair damage.

  In addition, the present applicants are tannin cross-linking agents mainly composed of tannin that has been previously reduced in an alkaline region of pH 8 to 10 and further activated by reduction action with sulfite, and between polypeptide chains in the hair. The present invention provides a hair set treating agent capable of correcting a wave set of hair, a straight set of comb hair, correction of curly hair, etc. by generating a large number of tannin cross-linked three-dimensional network structures. This achieves the above-mentioned problem, but studies on hair cosmetics capable of performing wave wave setting of hair, straight setting of comb hair, correction of curly hair, etc. even in a wider range of pH have been conducted.

JP-A-5-78226 JP 2000-229819 A JP-A-6-321740

  The present invention seeks to solve the problems associated with the prior art as described above. In other words, the conventional two-bath type permanent wave, straight set and curly hair straightening, and the one bath type permanent wave, straight set and straight hair straightening are intended to improve the disadvantages, while suppressing damage to the hair, Reduces discomfort caused by mercaptan odor and post-treatment hair odor during treatment for practitioners and patients. Furthermore, the present invention aims to provide a hair cosmetic having an improved shape deformation / feel improvement effect, which can simplify the conventional process, reduce the treatment time, and alleviate the pain of the practitioner.

  As a result of intensive studies to solve the above-mentioned problems, the present inventors have found that a reducing agent that cleaves disulfide bonds between keratin molecules in hair by a reducing action in the range of pH 6 to 10, an odorless and safe and safe. By simultaneously using tannin that can be used with heart, in the presence of a reducing agent, a tannin cross-linking bond instead of a disulfide bond is generated between the polypeptide chains in the hair, thereby cleaving the hair waveset and the internal distortion of the hair. Uses a hair cosmetic that has features that enable easy recombination of hair straight set and hair straightening, etc., and that suppresses damage to hair, and is effective in deforming hair and improving touch I found out that it can be achieved. That is, this invention relates to the hair cosmetics as shown below.

Item 1. One or more tannins of organic or inorganic origin of natural or synthetic origin; and one or more of cleaving inter-disulfide bonds between keratin molecules in hair selected from the group consisting of sulfites and mercaptan-based reducing agents, or Hair cosmetics having a pH of 6 to 10, comprising two or more reducing agents.
Item 2. Item 2. The hair cosmetic according to Item 1, further comprising at least one selected from the group consisting of urea, guanidine carbonate, sodium lactate and salicylic acid as a hydrogen bond or salt bond chain-opening promoting component.
Item 3. Furthermore, at least one monohydric alcohol and / or glycerin, 1,3-BG, propylene glycol, ethylene glycol, dipropylene glycol and hexylene selected from the group consisting of methanol, ethanol, propanol, isopropanol and benzyl alcohol Item 3. The hair cosmetic according to Item 1 or 2, which contains at least one polyhydric alcohol selected from the group consisting of glycols as an organic solvent.
Item 4. Item 4. The hair according to any one of Items 1 to 3, wherein the hair is heated for 10 to 30 minutes in a temperature range of 30 to 60 ° C. after being applied to the hair in order to enhance the tannin crosslinking effect. Cosmetics.
Item 5. Item 5. The hair cosmetic according to any one of Items 1 to 4, further comprising at least one direct dye selected from the group consisting of acidic, basic, and HC dyes.
Item 6. Item 6. The hair cosmetic according to any one of Items 1 to 5, which contains condensed tannin as tannin.
Item 7. Item 1. The reducing agent is sulfite alone and the hair cosmetic has a pH of 6 to 8, or the reducing agent is a combination of sulfite and a mercaptan-based reducing agent, and the hair cosmetic has a pH of 6 to 10. Hair cosmetics in any one of -6.

  The hair cosmetic composition of the present invention contains a reducing agent and tannin in one agent at the same time when wave or straight or curly hair correction is performed on the hair in a hairdressing salon etc. Therefore, there is little damage to hair, and it has an effect of improving shape deformation and feel by binding conversion of fibers, hair, etc. easily in a short time.

Hereinafter, the present invention will be described in detail with reference to examples.
The present invention relates to keratin molecules in hair selected from the group consisting of one or more organic or inorganic tannins of natural or synthetic origin, and sulfites and combinations of sulfites and mercaptan-based reducing agents. Provided is a hair cosmetic composition having a pH of 6 to 10, comprising one or more reducing agents that cleave interdisulfide bonds.

The tannin used in the present invention includes any organic or inorganic hydrolyzed tannin or condensed tannin of natural or synthetic origin, and is not particularly limited, but natural products generally include tannin from plant raw materials. It may also contain non-tannins extracted at the same time. The hair cosmetic of the present invention is not particularly limited to conventionally known tannins, and one or two or more tannins can be appropriately used in combination. In particular, catechol-based condensed tannin is preferably used.
In general, when catechol-based condensed tannin having a large molecular weight is used for damaged hair, the keratin molecule variation in the hair and the polypeptide chain spacing are expanded, so that the formation of a three-dimensional network structure of tannin crosslinks is generated. It becomes advantageous and the cross-linking effect works effectively.

  Examples of the condensed tannin include quebracho tannin, wattle tannin, green tea tannin, mangrove tannin, Gambian tannin, and persimmon astringent tannin, which can be appropriately used alone or in combination of two or more. Persimmon tannin, wattle tannin, quebracho tannin and green tea tannin are preferred, and quebracho tannin and green tea tannin are more preferred.

In addition, since the degree of damage varies depending on the hair tip part, middle part, and root rebirth part, hair is mixed with pyrogallol hydrolyzable tannin with low molecular weight, mainly catechol-based condensed tannin with high molecular weight. By using a thing and prescribing it corresponding to all those parts, an excellent setting effect and a straight effect are exhibited.
Examples of the hydrolyzable tannin include pentaploid tannin, gallic tannin, chestnut tannin, mylobaran tannin, oak tannin and the like, and one or a combination of two or more can be used as appropriate. Preferable are gallic tannin, milovalan tannin, pentaploid tannin and chestnut tannin, and more preferred are pentaploid tannin and chestnut tannin.

  Although the density | concentration of the said tannin is not specifically limited, 0.001-10 mass% is preferable with respect to the total mass of the cosmetics for hair, Furthermore, 0.05-5 mass% is more preferable. If the tannin content is less than 0.001% by mass, the effect may not be sufficiently exhibited. On the other hand, if the tannin content is more than 10% by mass, the hair is squeezed or stiff. It is not preferable because the feeling of sticking or the like is deteriorated and a dosage form such as cream or lotion cannot be obtained and the effect may be reduced. In the present specification, the term “%” simply means “% by mass”.

  In addition, the amount of tannin bound to the hair generally increases in penetrating power as the tannin concentration increases, but in condensed tannins with strong binding power, the tannin molecules become aggregated when the concentration exceeds a certain level, and conversely decreases. It was also confirmed that there was a risk of doing so.

The reducing agent used in the present invention cleaves disulfide bonds between keratin molecules in hair used in the technical field such as wave or straightening and hair straightening, such as sulfites and mercabtan reducing agents. Although any reducing agent is included, the use of sulfite alone and the combination of sulfite and a mercabtan reducing agent are preferred. The hair cosmetic composition of the present invention is not particularly limited to conventionally known reducing agents, and can be appropriately used singly or in combination of two or more. The compounding quantity of sulfites exists in the range of 1-9 mass% with respect to the total mass of cosmetics for hair. If it is less than 1% by mass, the reducing power is not sufficient, and if it exceeds 9% by mass, the hair is seriously damaged.
As the mercaptan-based reducing agent, thioglycolic acid, cysteine, acetylcysteine, cysteamine, thioglycerin, thiolactic acid, butyrolactone thiol, or a mixture of two or more thereof is used. The compounding quantity of these mercaptan-type reducing agents is 0.1-5 mass% with respect to the total mass of cosmetics for hair. If it is less than 0.1% by mass, the reducing power is not sufficient, and if it exceeds 5% by mass, the hair is seriously damaged and the unpleasant odor is strong.

  Moreover, it is preferable to contain at least one selected from urea, guanidine carbonate, sodium lactate, salicylic acid and the like as a component for promoting chain opening of hydrogen bonds and salt bonds. The hair cosmetic composition of the present invention can be suitably used singly or in combination of two or more kinds without being particularly limited to conventionally known chain-opening promoting components. The compounding quantity of a hydrogen bond chain-opening acceleration | stimulation component is 0.1-3 mass% with respect to the total mass of cosmetics for hair. When the amount is less than 0.1% by mass, the hydrogen bond or the salt bond is not sufficiently opened, and when the amount exceeds 3% by mass, the effect is not improved.

  The cosmetic for hair of the present invention is adjusted to pH 6 to 10, more preferably pH 6 to 8, by adding an alkaline agent as a pH adjusting component. When the pH is less than 6, the hair swells little and the activity of the reducing agent becomes low. When the pH exceeds 10, the damage to the hair increases, which is not preferable.

  Although it does not specifically limit as an alkaline agent, Ammonia water, monoethanolamine, triethanolamine, ammonium bicarbonate, ammonium carbonate, potassium hydroxide, sodium hydroxide, monoisopropanolamine, diisopropanolamine, 2- Other inorganic alkaline substances and amines such as amino-2-methyl-1-propanol, ammonium sulfate, ammonium nitrate, ammonium chloride, trisodium phosphate, trisodium citrate, L-arginine, etc., and one of these Alternatively, from the viewpoint of adding two or more in combination and reducing irritation to the hair and scalp of the user, it is preferable to adjust the hair cosmetic to pH 6-10, more preferably pH 6-8, More preferably, the pH is adjusted to 6 or more and less than 8. That.

  Moreover, in the cosmetic for hair of this invention, you may add the direct dye for performing a hair dyeing process simultaneously with the wave or straight or hair curling correction to hair. Direct dyes include acid dyes, basic dyes and HC dyes. The hair cosmetic composition of the present invention is not particularly limited to conventionally known direct dyes, and can be appropriately used singly or in combination of two or more. The compounding quantity of a direct dye is 0.0001-10 mass% with respect to the total mass of the cosmetics for hair. If it is less than 0.0001% by mass, the dyeing power on the hair is insufficient, and if it exceeds 10% by mass, the dyeing effect is not improved and the stability of the dosage form cannot be obtained.

The tannin in the present invention may be mixed with a penetrating agent such as an anionic surfactant or a nonionic surfactant in order to enhance the penetration into the hair.
In order to further improve solubility and permeability, at least one monohydric alcohol selected from the group consisting of methanol, ethanol, propanol, isopropanol and benzyl alcohol, glycerin, 1,3-BG, propylene glycol, A polar organic solvent such as at least one polyhydric alcohol selected from the group consisting of ethylene glycol, dipropylene glycol and hexylene glycol, or water may be used, and these may be used alone or in combination of two or more. May be. In particular, an alcohol having a hydroxyl group is preferable, and a monovalent lower alcohol represented by ethanol is more preferable.

  The cosmetics for hair of the composition of the present invention are also other ingredients such as a moisturizer, astringent, refreshing agent, antioxidant, as needed, as long as the effects are not hindered by the components usually used in cosmetics and the like. UV absorbers, high molecular weight polymer agents such as cationic, anionic, amphoteric or nonionic, liquid oils, solid oil waxes, ester oils, hydrocarbon oils, higher alcohols, sterol oils, thickeners, gelling Agents, fluorine compounds, silicones, pH stabilizers, chelating agents, anti-inflammatory agents, plant extracts, protein hydrolysates, amino acids, solvents, alcohols, organic acids, powder ingredients, preservatives, colorants, water, fragrances Etc. can be appropriately added and blended as necessary, but is not limited thereto.

  Further, the form of the cosmetic for hair can be prepared in various forms and is not particularly limited. For example, cream, lotion, gel, paste, powder, solid, foam, spray In order to make it foamy, a propellant such as LPG, DME, or hexane is mainly blended, and a non-gas foaming type may be used.

  When the cosmetic for hair of the present invention is used for the purpose of permanent wave, straight set, curly hair correction, etc., it is applied at a treatment temperature of 30-60 ° C. in order to enhance the cross-linking effect of tannin. For 10 to 30 minutes.

  In using the cosmetic for hair of the present invention as a permanent wave agent, the hair is wound around a lot after applying the agent to the hair, and heated at a heating temperature of 30 to 60 ° C, preferably 40 to 50 ° C. If it is 30 ° C. or less, it takes too much time and it is difficult to obtain a sufficient effect, and if it is 60 ° C. or more, the hair is greatly damaged and the touch tends to deteriorate. In addition, although the heating method is not specifically limited, It is preferable to make it act in water vapor | steam atmosphere using the steamer etc. which are used for a permanent wave process during heating process time. Further, the treatment time varies depending on the properties and state of the hair, but a treatment time of 15 to 30 minutes is required at 40 to 50 ° C. When the treatment temperature is increased to 50 to 55 ° C., the penetration rate and reaction rate of the components are increased, and the treatment time can be shortened to 10 to 20 minutes.

In addition, when used as a straight set or straightening hair, after applying the hair cosmetic of the present invention to the hair, applying a physical force using a comb or the like to straighten the hair, the heating temperature Is heated to 30 to 60 ° C, preferably 40 to 50 ° C. Below 30 ° C., it takes too much time and it is difficult to obtain a sufficient straight effect. Above 60 ° C., hair damage is large and the touch tends to be poor.
In addition, although the heating method is not specifically limited, It is preferable to make it act in water vapor | steam atmosphere using the steamer etc. which are used for a permanent wave process during heating process time. Further, the treatment time varies depending on the properties and state of the hair, but a treatment time of 15 to 30 minutes is required at 40 to 50 ° C. When the treatment temperature is increased to 50 to 55 ° C., the penetration rate and reaction rate of the components are increased, and the treatment time can be shortened to 10 to 20 minutes. As an alternative, it is also preferred to be used in a usage using a high-temperature hair iron.

Furthermore, in using as a comb hair straightening, after applying the cosmetic for hair of the present invention to the hair, it is combed and stretched with a comb or a trowel, and then left as it is for a while.
Moreover, it is also preferable that drying with a dryer and a hair iron are used as needed.

  EXAMPLES The present invention will be described below with reference to examples, but the present invention is not limited to these examples.

(Tannin or tannic acid-containing preparation)
Example 1 shows a case where 2% by mass of a catechol-based condensed tannin (green tea tannin) is contained in a 4% by mass aqueous sodium sulfite solution adjusted to pH 9 using monoethanolamine. In Example 2, the most widely used tannin acid (pentotannin) which is most widely used among tannins permitted for cosmetics is contained. And in the comparative example 1 compared with this, tannin was not contained but comparative evaluation was implemented. In addition, the pH of the adjustment liquid of Example 1, Example 2, and Comparative Example 1 was 8.9, 8.8, and 9.1, respectively.

Evaluation Test Method and Evaluation Criteria A. Wave efficiency test Twenty-five human hairs are wrapped around a wave device of the Kilby method, soaked in a preparation solution for 20 minutes, taken out, placed in an empty container and left at room temperature for another 20 minutes. Then, after the predetermined time has elapsed, the water is taken out and washed. The hair after such treatment is removed from the wave apparatus and the wave efficiency is measured.
Wave efficiency (%) = 100- {100 × (ba) / (ca)}
a: Total distance (cm) between 5 bars of wave equipment
b: Total distance (cm) of the five peaks of the wave formed on the hair
c: Distance when b is straightened

B. Wave retention rate test 7.6 g of the hair whose wave efficiency was measured in the wave efficiency test was hung in the room, hung in the room, the wave efficiency was measured after one week, and the wave efficiency after treatment with the preparation solution was set to 100. Calculate the rate.
Wave retention (%) = wave efficiency after processing / wave efficiency before processing × 100

C. Hair Strength Test The breaking load was measured using a tensile tester (Kato Tech Co., Ltd .: KES-G1-SH) for which the hair efficiency was measured in the wave efficiency test. At the same time, the hair strength was calculated with the breaking load of the test hair bundle treated with purified water as 100%.
Hair Strength (%) = Wave Efficiency Test Hair Break Load (g) / Purified Water Treatment Hair Break Load (g) × 100

D. Elasticity imparting effect Healthy hair of women in their 20s is washed with 0.5% aqueous sodium lauryl sulfate solution (40 ° C.) for 3 minutes, rinsed with tap water (40 ° C.) for 2 minutes and towel-dried. Further, after immersing in a bleach solution prepared according to the following formulation (room temperature) for 30 minutes, rinse well with tap water (40 ° C.), towel dry, and air dry to prepare a test hair bundle.
Bleach solution: 25% aqueous ammonia 4.0% by volume aqueous solution 50.0% by volume
+ 35% hydrogen peroxide solution 6.0% by volume aqueous solution 50.0% by volume

The prepared test hair bundle is soaked in each preparation solution of Examples 1 to 2 or Comparative Example 1 for 20 minutes, then taken out, put into an empty container and left at room temperature for 20 minutes. Then, after the predetermined time has elapsed, the water is taken out and washed.
The hair bundle that has undergone such treatment is subjected to a comparative evaluation with 10 male panelists and 10 female panelists (20 persons in total) in their 20s to 40s using the test hair bundle treated with purified water at the same time as elasticity. The properties were evaluated according to the following evaluation criteria. In addition, an evaluation result shows the average value of all the panelists.

Evaluation criteria: +2: Apparently better elasticity than the control
+1: Slightly better elasticity than the control
0: Same as control
-1: Slightly inferior to control
-2: The elasticity is clearly inferior to the control

  Each preparation liquid of Examples 1-2 and the comparative example 1 was prepared with the said prescription, and each test of the wave efficiency shown in the item of an evaluation test method and an evaluation standard, a wave retention, hair strength, and the elasticity imparting effect was implemented. The results are shown in Table 2.

As shown in Table 2, it was confirmed that Examples 1 and 2 were superior in wave efficiency and wave retention compared to Comparative Example 1 that did not contain tannin. Furthermore, it was confirmed that Examples 1 and 2 were also excellent in hair strength.
In addition, it was found that Examples 1 and 2 also have a good elasticity imparting effect in imparting elasticity.

(Permanent wave preparation)
Using a mixture of quebracho tannin and green tea tannin (mass ratio of 1: 1), preparation liquids for permanent waves (pH 7.5-8.0) of Examples 3-6 and Comparative Examples 2-3 were prepared, The prepared solution was evaluated by the following evaluation test methods and evaluation criteria. The formulation and results are shown in Table 3.

Evaluation Test Method and Evaluation Criteria A. Wave effect A bundle of healthy hair (20 cm in length) of a woman in her 20s was used as a test hair bundle, the hair bundle was moistened with warm water, and a rod (1.5 cm in diameter) was wound around. This hair bundle is soaked in the test solution for 20 minutes and then taken out and left at room temperature for 20 minutes. After a lapse of time, the rod was removed from the rod, washed with water, and then naturally dried. The treated hair bundle was visually observed, and the degree of wave application was evaluated using Comparative Example 2 as a control.
Evaluation criteria: A: Clearly better than Comparative Example 2
○: better than Comparative Example 2
Δ: Equivalent to Comparative Example 2
×: Slightly worse than Comparative Example 2
XX: worse than Comparative Example 2

B. Wave Persistence The hair bundle used in the evaluation of the wave effect was immersed in a 1% by mass sodium lauryl sulfate aqueous solution (40 ° C.), allowed to stand for 1 hour, washed with water and naturally dried. The hair bundle before the treatment and the hair bundle after the treatment were visually compared, and the sustainability of the wave was evaluated based on the same evaluation criteria as the wave effect with Comparative Example 2 as a control.

C. Damage degree About the hair bundle which performed said process, the state of the hair surface is observed using an electron microscope (JEOL: JSM5510LV). The degree of lift and delamination of the cuticle was compared with Comparative Example 2 as the degree of damage, and Comparative Example 2 was used as a control for evaluation based on the same evaluation criteria as the wave effect.

D. Feel at the time of finishing The feel of the hair bundle used in the evaluation of the wave effect was evaluated.
Comparative evaluation was performed by 10 male panelists and 10 female panelists (20 persons in total), and the touch feeling was evaluated according to the following evaluation criteria. In addition, an evaluation result shows the average value of all the panelists.
Evaluation criteria: +2: Apparently better elasticity than the control
+1: Slightly better elasticity than the control
0: Same as control
-1: Slightly inferior to control
-2: The elasticity is clearly inferior to the control

(Preparation solution for straight set)
Using a mixture of green tea tannin and pentaploid tannin (mass ratio 1: 1), preparation solutions for straight sets (pH 8.5 to 9.0) of Examples 7 to 10 and Comparative Examples 4 to 5 were prepared. The prepared solutions were evaluated according to the evaluation test methods and evaluation criteria. The formulations and results are shown in Table 4.

Evaluation Test Method and Evaluation Criteria A. Straightening effect A bundle of healthy hair (20 cm in length) of a woman in her 20s was used as a test hair bundle, the hair bundle was moistened with warm water, and both ends of the hair bundle were fixed and fixed on the panel. This hair bundle is immersed in the test solution for 20 minutes and then taken out and left at room temperature for 20 minutes. After a lapse of time, the panel was removed from the panel, washed with water, and then naturally dried. The treated hair bundle was visually observed, and the degree of straightness was evaluated using Comparative Example 4 as a control.
Evaluation criteria: A: Clearly better than Comparative Example 4
○: Better than Comparative Example 4
Δ: Equivalent to Comparative Example 4
X: Slightly worse than Comparative Example 4
XX: worse than Comparative Example 4

B. Straightness Persistence The hair bundle used in the evaluation of the straight effect was immersed in a 1% by mass sodium lauryl sulfate aqueous solution (40 ° C.), allowed to stand for 1 hour, washed with water, and naturally dried. The hair bundle before the treatment and the hair bundle after the treatment were visually compared, and the straightness was evaluated based on the same evaluation criteria as the straight effect with Comparative Example 4 as a control.

C. Damage degree About the hair bundle which performed said process, the state of the hair surface is observed using an electron microscope (JEOL: JSM5510LV). Using Comparative Example 4 as a control, the degree of lift and peeling of the cuticle was evaluated as the degree of damage based on the same evaluation criteria as the straight effect.

D. Feeling at the time of finishing The feel of the hair bundle used in the evaluation of the straight effect was evaluated.
Comparative evaluation was performed by 10 male panelists and 10 female panelists (20 persons in total), and the touch feeling was evaluated according to the following evaluation criteria. In addition, an evaluation result shows the average value of all the panelists.
Evaluation criteria: +2: Apparently better elasticity than the control
+1: Slightly better elasticity than the control
0: Same as control
-1: Slightly inferior to control
-2: The elasticity is clearly inferior to the control

(Preparation solution for hair straightening)
Using pentaploid tannin, preparation liquids (pH 6.0-7.0) for Examples 10-14 and Comparative Examples 6-7 were prepared, and the preparation liquids were evaluated by the following evaluation test methods and evaluation criteria. . The formulation and results are shown in Table 5.

Evaluation Test Method and Evaluation Criteria A. Comb hair straightening effect A healthy hair (length 20cm) of a woman in her 20s is used as a test hair bundle, moistened with warm water, towel-dried, and then the test solution is applied to the whole hair bundle and combed with a comb. Then, it was naturally dried. The treated hair bundle was visually observed, and the condition of combing hair was evaluated using Comparative Example 6 as a control.
Evaluation criteria: A: Clearly better than Comparative Example 6
○: better than Comparative Example 6
Δ: Equivalent to Comparative Example 6
×: Slightly worse than Comparative Example 6
XX: worse than Comparative Example 6

B. Persistence of hair straightening The hair bundle used in the evaluation of the hair straightening effect was immersed in a 1% by mass aqueous sodium lauryl sulfate solution (40 ° C.), allowed to stand for 1 hour, then washed with water and naturally dried. The hair bundle before the treatment and the hair bundle after the treatment were visually compared, and the persistence of the comb hair straightening was evaluated according to the same evaluation criteria as the comb hair straightening effect with Comparative Example 6 as a control.

C. Feeling at the time of finishing The touch feeling of Mao used in the evaluation of the effect of correcting the comb hair was evaluated.
Comparative evaluation was performed by 10 male panelists and 10 female panelists (20 persons in total), and the touch feeling was evaluated according to the following evaluation criteria. In addition, the average value of an evaluation result is shown.
Evaluation criteria: +2: Apparently better elasticity than the control
+1: Slightly better elasticity than the control
0: Same as control
-1: Slightly inferior to control
-2: The elasticity is clearly inferior to the control

  According to the present invention, the reducing agent and tannin are blended at the same time, and when hair or straightening or curling correction is performed on hair in a hairdressing salon, etc., hair damage is reduced and hair is reduced for a short time. Thus, it is possible to provide a cosmetic for hair having an effect of improving shape deformation and feel by bonding conversion of fibers and hair.

Claims (6)

One or more tannins of organic or inorganic origin of natural or synthetic origin ;
One or more reducing agents selected from the group consisting of sulfites and mercaptan-based reducing agents, which cleave intermolecular disulfide bonds between keratin molecules in hair ; and
A hair cosmetic having a pH of 6 to 10, comprising at least one selected from the group consisting of urea, guanidine carbonate, sodium lactate and salicylic acid as a hydrogen bond or salt bond open chain promoting component ,
The hair cosmetic, wherein the mercaptan-based reducing agent is thioglycolic acid, cysteine, acetylcysteine, cysteamine, thioglycerin, thiolactic acid, butyrolactone thiol, or a mixture of two or more thereof . Furthermore, at least one monohydric alcohol and / or glycerin, 1,3-BG, propylene glycol, ethylene glycol, dipropylene glycol and hexylene selected from the group consisting of methanol, ethanol, propanol, isopropanol and benzyl alcohol claim 1 Symbol placement hair cosmetic containing at least one polyhydric alcohol selected from the group consisting of glycol as an organic solvent. The hair cosmetic according to claim 1 or 2 , wherein the hair cosmetic is heated for 10 to 30 minutes in a temperature range of 30 to 60 ° C after being applied to the hair in order to enhance the crosslinking effect of tannin. The hair cosmetic according to any one of claims 1 to 3 , further comprising at least one direct dye selected from the group consisting of acidic, basic and HC dyes. The hair cosmetic composition according to any one of claims 1 to 4 , comprising condensed tannin as tannin. The reducing agent is sulfite alone and the hair cosmetic has a pH of 6 to 8, or the reducing agent is a combination of sulfite and a mercaptan-based reducing agent, and the hair cosmetic has a pH of 6 to 10. The hair cosmetic composition according to any one of 1 to 5 .