JP2019077620A - Hair treatment method - Google Patents

Abstract

To provide hair treatment methods that can obtain a sufficient hair deformation effect while suppressing the occurrence of hair damage and unpleasant odor due to hair treatment, in either of healthy hair and damaged hair.SOLUTION: Provided is a hair treatment method comprising a first step of applying to the hair an aqueous composition containing hydrolysis keratin; a second step of forming a curled design or a straight design on the hair to which the aqueous composition is applied; and a third step of heating the wet hair in which a curled design or a straight design is formed, at a temperature higher than 40°C and less than 100°C.SELECTED DRAWING: None

Description

  The present invention relates to a hair treatment method for forming a curl design or a straight design on hair.

  In the hair deformation process accompanied by the reduction process of the hair represented by permanent wave process, the hair is oxidized after the reduction process to fix the deformation.

  More specifically, first, a reducing step of using a reducing agent such as thioglycolic acid as a main component and cutting a cystine bond of hair keratin with a first agent containing an alkaline agent, and an oxidizing agent such as bromate are mainly used. A curl design or straight design is formed on the hair by an oxidation process which is restored to cystine bond again by the second agent as a component.

  Here, in the above-mentioned hair treatment method, since reduction treatment and oxidation treatment are performed under alkali, there is a problem that damage to the hair is large and the effect by permanent wave treatment is insufficient.

  Therefore, in order to eliminate these disadvantages, a method of heating the hair has been proposed. More specifically, after the first agent containing a reducing agent is applied to the hair and washed, the hair is wound around a heatable rod by energization, the rod is heated to heat the hair, and the rod is removed. There has been proposed a method of applying a second agent containing an oxidizing agent to hair. Then, it is described that such a treatment method can impart a strong curl design to the hair with less damage to the hair due to permanent wave treatment (see, for example, Patent Document 1).

  In addition, in order to reduce the damage to the hair, a hair treatment method using a single bath type permanent waving agent has been proposed. More specifically, a single-bath permanent waving agent containing hydrolyzed keratin having an average molecular weight of 25,000 to 35,000 is applied to damaged hair, and after winding the hair on a rod, for a predetermined time, It is proposed to leave it and then remove the rod and wash it. And, when performing permanent processing on damaged hair by such processing method, it is described that further damage to the hair by the permanent wave processing can be reduced (for example, see Patent Document 2) ).

Unexamined-Japanese-Patent No. 2004-262798 Japanese Patent Application Publication No. 2001-247436

  However, in the treatment method described in Patent Document 1, since the heating treatment is performed on the hair subjected to the reduction treatment, the hair is damaged due to the heating treatment, and the reaction during the heating treatment is performed. There was a problem that odor and residual odor after hair treatment were generated.

  Moreover, in the processing method described in Patent Document 2, although the damage on the damaged hair can be reduced, the target hair is limited to the damaged hair. The surface of healthy hair is highly hydrophobic, and the penetration of hydrolyzed keratin having an average molecular weight of 25,000 to 35,000 is insufficient, so it is difficult to obtain a sufficient hair deforming effect (curled shape strength) Met.

  Therefore, the present invention has been made in view of the above problems, and in any of healthy hair and damaged hair, the generation of hair damage and unpleasant odor due to hair treatment is suppressed and sufficient. An object of the present invention is to provide a hair treatment method capable of obtaining a hair deforming effect.

  In order to achieve the above object, the hair treatment method of the present invention comprises a first step of applying an aqueous composition containing hydrolyzed keratin to the hair, and forming a curl design on the hair to which the aqueous composition is applied. The method is characterized by at least including two steps and a third step of performing heating treatment at a temperature higher than 40 ° C. and less than 100 ° C. in a state where the hair is wet, with respect to the hair where the curl design is formed. Do.

  ADVANTAGE OF THE INVENTION According to this invention, while being able to suppress the damage of the hair resulting from hair processing also in any healthy hair and damage hair, the effect of the outstanding hair deformation can be acquired. Moreover, generation | occurrence | production of the unpleasant odor resulting from hair processing can be suppressed.

  Hereinafter, preferred embodiments of the present invention will be described. In addition, this invention is not limited to the following embodiment, In the range which does not change the summary of this invention, it can change suitably and can apply.

  The hair treatment method of the present invention comprises a first step of applying an aqueous composition containing hydrolyzed keratin to the hair, a second step of forming a curl design on the hair to which the aqueous composition is applied, and a curl design. And a third step of heating the hair while the hair is wet, and the conventional oxidation treatment and reduction treatment are not performed.

(Step 1)
In the hair treatment method of the present invention, an aqueous composition containing hydrolyzed keratin is applied to the hair.

  Since this hydrolyzed keratin contains a large amount of cystine, it is very easy to conform to the hair, and by applying an aqueous composition containing such hydrolysed keratin, the damage to the hair is reduced and the excellent hair is excellent. The effect of deformation can be obtained.

  The hydrolyzed keratin is not particularly limited as long as it is generally used for hair cosmetics.

  Further, the average molecular weight of the hydrolyzed keratin is not particularly limited, but the average molecular weight of the hydrolyzed keratin is preferably 10000 or more. This is because when the average molecular weight is less than 10000, although it penetrates to the inside of the hair when performing the "warming treatment in the wet state of the hair" described later, since the molecular size is small, the fixing to the hair is insufficient As a result, the hair deforming effect may not be sufficiently exhibited.

  Moreover, although the presence or absence of chemical modification in this hydrolysis keratin is not specifically limited, It is preferable to use the hydrolysis keratin which is not chemically modified. In the case of using hydrolyzed keratin to which chemical modification such as cationization or silylation has been applied, the finish feeling (softness, slippage) can be obtained by performing the “warming treatment while the hair is wet” described later. Although it improves, etc.), it is because the hair deformation effect which is a main effect may fall due to chemical modification.

  For example, "Proticut U alpha" (manufactured by Ichimaru Falcos Co., Ltd.) containing hydrolysed keratin having an average molecular weight of 35,000, "Proticut C alpha" (one round containing hydroxypropyltrimonium hydrolyzed keratin (cationized modification) having an average molecular weight of 35,000 Falcos Co., Ltd., "Promois WK-GB" (made by Seiwa Kasei Co., Ltd.) containing hydrolyzed keratin having an average molecular weight of 10000, "Promois WK-L" containing hydrolysed keratin having an average molecular weight of 4000 (made by Seiwa Kasei Co., Ltd.) "Promois WK-H" (made by Seiwa Kasei Co., Ltd.) containing hydrolysed keratin having an average molecular weight of 1000, "Promois WK" containing hydrolysed keratin having an average molecular weight of 400 (made by Seiwa Kasei Co., Ltd.) Dihydroxymethylsilylpropoxy) hydroxypropyl hydrolysis "Promois WK-HSIG" (made by Seiwa Kasei Co., Ltd.) containing anti-keratin (silylation modification), "Promois WK-Q" (composition) containing hydroxypropyltrimonium hydrolyzed keratin (cationization modification) having an average molecular weight of 600 Commercial products, such as "Keratide TK-C" (made by Toyo Feather Industry Co., Ltd.), which contains Hydroxypropyltrimonium hydrolyzed keratin (cationized modification) having an average molecular weight of 1000, and the like can be used.

  As the aqueous composition of the present invention, for example, one in which the above-mentioned hydrolyzed keratin is dispersed in a solvent such as water can be used, but from the viewpoint of sufficiently exerting the hair damage reducing effect and the deforming effect, As for the compounding quantity of hydrolyzed keratin with respect to the whole aqueous composition, 0.1-20 mass% is preferable.

(Step 2)
The method for forming a curl design in the hair treatment method of the present invention is not particularly limited as long as it is a method generally used as a cosmetic technique, and for example, a method using a heating element, a method using an appliance called a rod, and The method etc. which use a heatable rod are mentioned.

(Third step)
The hair treatment method of the present invention is characterized in that the curl design is fixed by performing a heating process on the hair on which the curl design is formed while the hair is wet.

  In addition, "the state in which the hair is wet" referred to here means the state as it is without drying the hair which is in a wet state by washing with an aqueous composition or a shower after the curl design treatment in the second step. Or “in a state where the hair is in a wet state by rinsing with an aqueous composition or shower after the curl design treatment in the second step (that is, while the hair holds the water) Means "."

And in this heating process, it is characterized in that heating is performed at a temperature higher than 40 ° C. and lower than 100 ° C.

  This is because when the processing temperature for fixing the curled design is 40 ° C. or less, the temperature required to obtain the hair deforming effect (the strength of the curled shape) becomes insufficient, so the desired curled design is obtained. Because it may not be possible.

  Also, when the processing temperature for fixing the curled design is 100 ° C. or higher, although the curled design can be formed with certainty, the generation of an unpleasant odor or the heat in the hair is thermally damaged due to the high temperature treatment. In some cases, a good finish (good softness and good slip) may not be obtained.

  That is, by performing the heating treatment at a temperature higher than 40 ° C. and lower than 100 ° C., damage to the hair can be suppressed in both the healthy hair and the damaged hair, and the excellent hair deformation is obtained. It becomes possible to obtain an effect. Furthermore, it becomes possible to suppress the generation of the unpleasant odor resulting from the heating process.

  The temperature in the heating step is preferably 50 ° C. or more and 90 ° C. or less from the viewpoint of improving the effect of hair deformation and the finish feeling.

  Moreover, as for the processing time which heat-processes, 3 minutes or more and 45 minutes or less are preferable. This is because if it is less than 3 minutes, there may be a disadvantage that the hair deforming effect may be insufficient due to the insufficient heating time, and if it is longer than 45 minutes, the excessive heating time may occur. It is because the problem that a feeling of finish falls may arise resulting from.

  In addition, when the hair is wet, the heating treatment is performed because, when the hair is dry when heated, the hydrolyzed keratin in the aqueous composition can not efficiently penetrate into the hair, This is because the hair deforming effect may be insufficient and a desired curl design may not be obtained.

  As a specific example of this process, when the curled hair is immersed in warm water (greater than 40 ° C. and less than 100 ° C.) and subjected to a heating treatment, or a cover capable of moisturizing the curled hair The heating process may be performed in a wrapped state.

(Other ingredients)
The solvent (dispersion medium) used in the aqueous composition of the present invention is not particularly limited, and water is used, but if necessary, organic solvents such as ethanol and isopropanol are harmless even if they come in contact with the human body. It may be contained in water at a concentration.

  In the aqueous composition of the present invention, a pH adjusting component (eg, guanidine carbonate, sodium dihydrogen phosphate, disodium hydrogen phosphate, trisodium phosphate, sesquicarbonate, etc.) as long as the effects of the present invention are not impaired. Arginine, sodium hydrogen carbonate, sodium carbonate, monoethanolamine, triethanolamine, ammonia, 2-amino-2-methyl-1-propanol, sodium hydroxide, tripotassium citrate, trisodium citrate, hydrogen phosphate Ammonium, tartaric acid, citric acid, lactic acid, phosphoric acid etc., oily components (eg, sphingolipids, ceramides, cholesterol derivatives, phytosterol derivatives, phospholipids, lanolin, lanolin fatty acid derivatives, perfluoropolyether etc.), vegetable oils (eg, , Olive oil, shea butter, macadamia nuts Etc.), waxes (eg jojoba seed oil, carnauba wax, candelilla wax, beeswax etc.), hydrocarbons (eg liquid paraffin, light liquid isoparaffin, paraffin, microcrystalline wax, squalane, vaseline, isododecane, isohexadecane etc) , Higher fatty acids (eg, myristic acid, oleic acid, stearic acid, isostearic acid, branched fatty acids (C (carbon number) 14-28), hydroxystearic acid, etc.), alcohols (eg, cetearyl alcohol, cetanol, isostearyl) Alcohol, oleyl alcohol, hydrogenated rapeseed oil alcohol, cholesterol, sitosterol, 1,3-butylene glycol, propylene glycol, dipropylene glycol, glycerin, diglycerin, 1,2-pentanedio (1, 2-hexanediol etc.), sugar and its derivatives (eg glucose, sucrose, D-sorbitol, maltose, trehalose, polyoxypropylene methyl glucoside, glyceryl glucoside etc), esters (eg myristic acid Isopropyl, cetyl palmitate, octyldodecyl oleate, glyceryl triisostearate, diethoxyethyl succinate, cetyl lactate, lanolin fatty acid octyldodecyl etc., silicones (eg, dimethyl silicone, methyl phenyl silicone, cyclic dimethyl silicone, polyether) Modified silicone, alkyl-modified silicone, amino-modified silicone, dimethiconol, PCA dimethicone etc., amino acids and their derivatives (eg, glutamic acid, aspartic acid, glycine, etc.) Serine, methionine, trimethylglycine, sodium polyaspartate, sodium lysine dilauroyl glutamate, N-lauroyl-L-lysine etc., PPT and proteins (eg, hydrolyzed silk, hydrolyzed wheat, hydrolyzed soybean, hydrolyzed collagen) , Silylated hydrolyzed silk, silylated hydrolyzed wheat, cationized hydrolyzed silk, cationized hydrolyzed collagen, keratin etc., natural polymers and their derivatives (eg, alginate, mannan, gum arabic, tamarind gum, Chitosan, carrageenan, mucin, shellac, hyaluronate, cationized hyaluronic acid, xanthan gum, dextrin, hydroxyethyl cellulose, cationized cellulose, guar gum, cationized guar gum, honey etc), synthetic high (Eg, anionic polymer, cationic polymer, nonionic polymer, amphoteric polymer, polyethylene glycol, polypropylene glycol, polyoxypropylene diglyceryl ether, etc.), anionic surfactant (eg, alkyl ether carbon, etc.) Acid salts, N-acyl glutamic acid, N-acyl methyl taurine salts, alkyl sulfosuccinates, alkyl sulfates, alkyl ether sulfates, polyoxyethylene alkyl ether phosphates, etc., cationic surfactants (eg, , Alkylamine salts, fatty acid amidoamine salts etc.), amphoteric surfactants (eg, glycine type amphoteric surfactants, aminopropionic acid type amphoteric surfactants, aminoacetic acid betaine type amphoteric surfactants, sulfobetaine type amphoteric surfactants Etc), non-ionic surface activity (For example, polyoxyethylene alkyl ether, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene hydrogenated castor oil, alkyl glucoside, new oil type glyceryl monostearate etc.), dyes (eg tar pigment, natural pigment etc), plant extract (Eg, chamomile extract, comfrey extract, sage extract, rosemary extract, oyster tannin, tea dry residue, copper chlorophyllin sodium etc.), vitamins (eg, L-ascorbic acid, DL-α-tocopherol, D-pane Tenol, natural vitamin E, etc., UV absorbers (eg, para-aminobenzoic acid, octyl salicylate, 2-ethylhexyl paramethoxycinnamate, ferulic acid, etc.), preservatives (eg, benzoic acid, sodium benzoate, salicylic acid, dehydro) Acetic acid, Dehi Sodium acetate, parabens, phenoxyethanol, methylisothiazolinone etc., antioxidants (eg, dibutyl hydroxytoluene etc.), sequestering agents (eg. Edetate, sodium polyphosphate, phytic acid etc.), other inorganic compounds (eg For example, titanium oxide, silver, platinum, iron chloride, iron oxide etc., other organic compounds (eg, urea, hydroxyethyl urea, sodium dl-pyrrolidonecarboxylate, copper gluconate etc.), solvents (eg, benzyl alcohol etc.) The known cosmetic components such as a propellant (for example, LPG (liquefied petroleum gas), DME (dimethyl ether), nitrogen gas, carbon dioxide gas, etc.), a fragrance and the like can be blended.

  The aqueous composition of the present invention can be in the form of liquid, milk, cream, foam (when used), mist (when used) and the like by known methods, and it is in aerosol form. It can also be done.

  The above embodiment may be modified as follows.

  The order of the steps in the first step and the second step in the above embodiment can be switched as appropriate. That is, after the curl design is formed on the hair, the aqueous composition containing hydrolyzed keratin is applied to the hair on which the curl design is formed, and then the hair to which the aqueous composition is applied is wetted as described above. A heating process may be performed. Even in this order of steps, the same effects as those of the above-described embodiment can be obtained.

  Moreover, you may cool-process a hair after the said 3rd process. More specifically, processing such as leaving at room temperature, applying cold air with a dryer or the like, immersing the hair in cold water, etc. is performed.

  And by performing such a cooling process, since the fixing effect in the deformation | transformation state of hair is heightened, the intensity | strength of curl shape and the persistence of curl shape can be improved.

  In the above embodiment, the curled design is applied to the hair, but the hair treatment method of the present invention can also be applied to the case of forming a straight design for false hair. For example, after applying an aqueous composition containing hydrolyzed keratin to the hair, a straight design is formed on the hair to which the aqueous composition is applied. Next, it is possible to heat the hair on which the straight design is formed at a temperature higher than 40 ° C. and lower than 100 ° C. while the hair is wet. Also, for example, after forming a straight design on the hair, an aqueous composition containing hydrolyzed keratin is applied to the hair on which the straight design is formed. Next, the hair to which the aqueous composition is applied can be heated at a temperature higher than 40 ° C. and lower than 100 ° C. while the hair is wet. Also in this case, the same effect as that of the above-described embodiment can be obtained.

  Hereinafter, the present invention will be described based on examples. The present invention is not limited to these examples, and these examples can be modified or changed based on the spirit of the present invention, and those examples are excluded from the scope of the invention Absent.

(Examples 1 to 18 and Comparative Examples 1 to 3)
<Production of treatment agent for hair deformation>
Water (ion exchange water) and each raw material were mix | blended, and the processing agent for hair deformation of Examples 1-18 and Comparative Examples 1-3 which have a composition (mass%) shown to Tables 1-3 was manufactured.

<Preparation of hair for sample>
Using a hair bundle (1 g) consisting of 25 cm long straight hair, as a chemical treatment, 2 times of dyeing treatment with a commercially available hair color is carried out, and after permanent wave treatment with a commercially available perm solution, 50 times After overnight immersion in an aqueous solution of sodium polyoxyethylene lauryl sulfate (5% by mass) kept at ° C., the sample was thoroughly washed with water.

Hair Treatment in Examples 1 to 18 and Comparative Examples 1 to 3
Next, the following treatments (A) to (F) were performed on the prepared hair.
(A) First, the prepared hair bundle of hair was wetted with water.
(B) Next, the aqueous compositions containing the hydrolyzed keratins of Examples 1 to 18 and Comparative Examples 1 to 3 were applied to the hair and allowed to stand at room temperature for 5 minutes.
(C) Next, it was rinsed in running water for 30 seconds to make the hair wet.
(D) Next, the hair was wound on a rod.
(E) Next, the hair in a state of being wound around the rod is immersed in the warm water set to each temperature of Examples 1 to 18 and Comparative Examples 1 to 3, and The heating process was performed during each processing time.
(F) After the heating process was completed, the rod was removed and the hair was washed with water through a cooling step of leaving at room temperature for 3 minutes.

<Evaluation criteria>
Next, the treatment temperature and the treatment time in the treatment of the above (E) exert on the formation of curl design, the smell, and the finish feeling of the hair treatment to the hair treated with the above (A) to (F). A sensory evaluation was performed on the effects.

  More specifically, (1) strength of curled shape, (2) durability of curled shape, (3) softness, (4) slippery feeling, (5) discoloration / discoloration, and (6) odor 6 The items were evaluated by 10 expert panelists. The evaluation criteria for each evaluation item are shown below.

(1) Strength of Curl Shape The strength of the curl shape was compared immediately after the final washing with water and evaluated according to the following evaluation criteria.
The wave efficiency is very high and the curl design is very firmly formed: ◎
Wave efficiency is high and the curl design is firmly formed: ○
The wave efficiency is low and the curl design is formed gently: △
The wave efficiency is very low and the curl design is very gently formed: x

(2) Persistence of Curl Shape In order to achieve the same condition as about 2 weeks after hair treatment, immerse the dried hair after the final water washing of hair treatment in warm water at 60 ° C for 20 minutes, I did a progress process.

In addition, the curled shape (wet time immediately after treatment) in the wet state of the hair immediately after the final water washing of the hair treatment and the curled shape (wet time after time elapsed treatment) in the wet state after the above-mentioned time lapse treatment It compared and evaluated according to the following evaluation criteria.
There is almost no difference between immediately after hair treatment and after the passage of time, and the persistence is very high: ◎
There is a slight difference between immediately after hair treatment and after the passage of time, but the durability is high: ○
There is a difference between immediately after the hair treatment and after the passage of time, and the persistence is low: △
There is a considerable difference between immediately after hair treatment and after the passage of time, and the persistence is very low: x

(3) Softness Softness of the touch when loosening the dried hair bundle after the final water washing of the hair treatment was evaluated according to the following evaluation criteria.
Very soft: ◎
Soft: ○
Some hardness: 硬
There is hardness: ×

(4) Slip feeling The finger feeling (slip feeling) when the dried hair bundle was loosened after the final water washing of the hair treatment was evaluated according to the following evaluation criteria.
Slip is very good: ◎
Good sliding: ○
Slip is a little bad: △
Slip is bad: x

(5) Discoloration and discoloration The discoloring and discoloring of the hair bundle dried after the final water washing of the hair treatment in comparison with the hair bundle before the hair treatment was evaluated according to the following evaluation criteria.
Very little amber and discoloration: ◎
Little amber and discoloration: ○
Slightly more amber and discoloration: △
Much amber and discoloration: x

(6) Odor The odor (odor) of the dried hair bundle after the final water washing of the hair treatment was evaluated according to the following evaluation criteria.
There is very little unpleasant odor: ◎
Less unpleasant odor: ○
Slightly unpleasant odor::
Offensive odor: x

  In addition, in each evaluation of said (1)-(6), it evaluated that "(double-circle)" is especially excellent, and evaluated as "(circle)" being excellent. Moreover, it evaluated that "(triangle | delta)" and "x" were inadequate. The above results are shown in Tables 1 to 3.

  As shown in Tables 1 to 3, in Examples 1 to 18 in which the temperature of the “heating treatment for wet hair” in the third step is higher than 40 ° C. and less than 100 ° C., hair deformation treatment While the effect of (curl design formation) (that is, the effect in each evaluation of the above (1) to (2)) is sufficiently obtained, a good finish feeling (that is, in the above evaluation of (3) to (4) above) It can be seen that the effect can be obtained. Moreover, while the effect which suppresses the damage to hair (namely, the effect in evaluation of said (3)-(5)) is obtained, the inhibitory effect of the unpleasant odor generation | occurrence | production resulting from a heating process (namely, said (6) It can be seen that the effects (in the evaluation) can be obtained.

  On the other hand, in Comparative Examples 1 and 2 in which the treatment temperature is 40 ° C. or less, although the generation of unpleasant odor can be suppressed, the treatment temperature is low, so the effect of the hair deformation treatment (that is, the above (1) to (2) It can be seen that the effects (in each evaluation) are insufficient.

  In addition, in Comparative Example 3 in which the treatment temperature is 100 ° C. or higher, although the curl design can be formed with certainty, the treatment temperature is high, so an unpleasant odor is generated due to the high temperature treatment, and It can be seen that since the components are thermally damaged, a good finish (i.e., the effects in the above evaluations (3) to (4)) can not be obtained.

(Examples 19 to 28 and Comparative Examples 4 to 6)
<Production of treatment agent for hair deformation>
Water (ion exchange water) and each raw material were mix | blended and the processing agent for hair deformation of Examples 19-28 and Comparative Examples 4-6 which have a composition (mass%) shown to Table 4-5 was manufactured.

<Preparation of hair for sample>
Using a hair bundle (5 g) consisting of 30 cm long shaggy hair, it is subjected to two dyeing treatments with a commercially available hair color as a chemical treatment, and after permanent wave treatment with a commercially available perm solution, at 50 ° C. After being immersed overnight in an aqueous solution of sodium polyoxyethylene lauryl sulfate (5% by mass) maintained in the above, those thoroughly washed with water were used as sample hair.

Hair Treatment in Examples 19 to 28 and Comparative Examples 4 to 6
Next, the following treatments (a) to (f) were performed on the prepared hair.
(A) First, the prepared hair bundle of hair was wetted with water.
(B) Next, the aqueous compositions containing the hydrolyzed keratins of Examples 19 to 28 and Comparative Examples 4 to 6 were applied to the hair and allowed to stand at room temperature for 5 minutes.
(C) Next, it was rinsed in running water for 30 seconds to make the hair wet.
(D) Next, the hair was attached to a glass plate and fixed in a straight shape.
(E) Next, the hair fixed in a straight shape is immersed in warm water set to each temperature of Examples 19 to 28 and Comparative Examples 4 to 6, and each of Examples 19 to 28 and Comparative Examples 4 to 6 is immersed. The heating process was performed during the processing time.
(F) After completion of the heating treatment, the hair was removed from the glass plate and washed with water through a cooling step of leaving at room temperature for 3 minutes.

<Evaluation criteria>
Next, the treatment temperature and the treatment time in the treatment of the above (e) exert on the formation of the straight design, the smell, and the finish feeling of the hair treatment for the hair treated with the above (a) to (f). A sensory evaluation was performed on the effects.

  More specifically, in addition to the above-mentioned (3) softness, (5) amber / discoloring, (6) odor, (7) strength of straight shape, (8) durability of straight shape, and (9) About 10 feeling of glossiness was evaluated by 10 expert panelists. The evaluation criteria in the evaluation items of (7) strength of straight shape, (8) durability of straight shape, and (9) glossiness are shown below.

(7) Strength of straight shape The strength of straight shape (unsmoothness) when the dried hair bundle is loosened immediately after the final water washing of hair treatment is compared with the condition before hair treatment according to the following evaluation criteria evaluated.
There is almost no habit: ◎
The habit is slightly left: ○
The habit is left: △
I have no sense at all: ×

(8) Persistence of straight shape In order to achieve the same condition as about 2 weeks after hair treatment, immerse the dried hair after the final water washing of hair treatment in warm water at 60 ° C for 20 minutes, I did a progress process.

In addition, the strength of the straight shape when the dried hair bundle is loosened after the final water washing of the hair treatment (unsmoothness immediately after the treatment) and the strength of the straight shape after the above-mentioned time-lapse treatment (after the time-lapse treatment) The comparison was made according to the following evaluation criteria.
There is almost no difference between immediately after hair treatment and after the passage of time, and the persistence is very high: ◎
There is a slight difference between immediately after hair treatment and after the passage of time, but the durability is high: ○
There is a difference between immediately after the hair treatment and after the passage of time, and the persistence is low: △
There is a considerable difference between immediately after hair treatment and after the passage of time, and the persistence is very low: x

(9) Glossiness After loosening the dried hair bundle immediately after the final water washing of the hair treatment, the presence or absence of gloss was evaluated according to the following evaluation criteria.
There is very shiny: ◎
There is a gloss: ○
There is a slight gloss: △
There is no gloss: ×

  In addition, in each evaluation of said (7)-(9), it evaluated that "(double-circle)" is especially excellent, and evaluated as "(circle)" being excellent. Moreover, it evaluated that "(triangle | delta)" and "x" were inadequate. The above results are shown in Tables 4 to 5.

  As shown in Tables 4 to 5, in Examples 19 to 28 in which the temperature of the “warming treatment for wet hair” in the third step is higher than 40 ° C. and less than 100 ° C., the hair deformation treatment While the effect of (straight design formation) (that is, the effect in each evaluation of the above (7) to (8)) is sufficiently obtained, a good finish feeling (that is, in each evaluation of the above (3) and (9) Effect) can be obtained. Moreover, while the effect which suppresses damage to hair (namely, the effect in evaluation of said (3), (5), (9)) is obtained, the control effect which suppresses the generation of the unpleasant odor resulting from heating processing (namely, said It can be seen that the effects (6) can be obtained.

  On the other hand, in Comparative Examples 4 to 5 in which the treatment temperature is 40 ° C. or less, although the generation of unpleasant odor can be suppressed, the treatment temperature is low, so the effect of the hair deformation treatment (that is, the above (7) to (8) It can be seen that the effects (in each evaluation) are insufficient.

  In addition, in Comparative Example 6 in which the treatment temperature is 100 ° C. or higher, although the straight design can be formed with certainty, the treatment temperature is high, so an unpleasant odor is generated due to the high temperature treatment, and It can be seen that since the components are thermally damaged, a good finish (i.e., the effects in the above evaluations (3) and (9)) can not be obtained.

  As described above, the present invention is particularly useful for hair treatment represented by permanent wave treatment.

Claims (4)

A first step of applying an aqueous composition containing hydrolyzed keratin to the hair;
A second step of forming a curled design or a straight design on the hair to which the aqueous composition is applied;
And at least a third step of performing heating treatment at a temperature higher than 40 ° C. and lower than 100 ° C. in a state in which the hair is wet, with respect to the hair on which the curl design or straight design is formed. Hair treatment method. The first step of forming a curled or straight design on the hair;
A second step of applying an aqueous composition containing hydrolysed keratin to the curled or straight design formed hair;
The method further comprises: a third step of performing heating treatment at a temperature higher than 40 ° C. and lower than 100 ° C. in a wet state of the hair to which the aqueous composition has been applied. Hair treatment method.   The hair treatment method according to claim 1 or 2, wherein the heating treatment time is 3 to 45 minutes.   The hair processing method according to any one of claims 1 to 3, wherein the hair is cooled after the third step.