JP6564440B2 - Hair treatment method - Google Patents

Description

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

  In a hair deformation process involving a hair reduction process typified by a permanent wave process, the hair is oxidized after the reduction process to fix the deformation.

  More specifically, first, a reducing step of cleaving the cystine bond of hair keratin with a first agent containing a reducing agent such as thioglycolic acid as a main component and 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 that returns the cystine bond to the second agent as a component.

  Here, in the said hair treatment method, since the reduction treatment and the oxidation treatment are performed under an alkali, there is a problem that the damage to the hair is large and the effect by the 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 rod that can be heated by energization, the rod is heated to heat the hair, and the rod is removed. A method of applying a second agent containing an oxidizing agent to hair has been proposed. And it is described by such a processing method that there is little damage of the hair by a permanent wave process, and a strong curl design can be provided to hair (for example, refer patent document 1).

  In order to reduce the damage to the hair, a hair treatment method using a one-bath type permanent wave forming agent has been proposed. More specifically, after applying a one-bath type permanent wave forming agent containing hydrolyzed keratin having an average molecular weight of 25,000 to 35,000 to damaged hair and winding the hair around a rod, a predetermined time, There has been proposed a method in which the rod is left and then removed and washed. And when performing a permanent process with respect to damaged hair by such a processing method, it is described that the further damage to the hair by the said permanent wave process can be reduced (for example, refer patent document 2). ).

JP 2004-262798 A JP 2001-247436 A

  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 occurred.

  Moreover, in the processing method of the said patent document 2, although the damage in damaged hair can be reduced, the target hair was limited to damaged hair. Since the surface of healthy hair is highly hydrophobic and the penetration of hydrolyzed keratin with an average molecular weight of 25,000-35,000 is insufficient, it is difficult to obtain a sufficient hair deformation effect (curl shape strength). Met.

  Therefore, the present invention has been made in view of the above problems, and in both normal hair and damaged hair, while suppressing the occurrence of hair damage and unpleasant odor caused by hair treatment, it is sufficient. It aims at providing the hair processing method which can acquire a hair deformation effect.

  In order to achieve the above object, the hair treatment method of the present invention includes a first step of applying an aqueous composition containing hydrolyzed keratin to the hair, and a step of forming a curl design on the hair to which the aqueous composition is applied. Characterized in that it comprises at least a second step and a third step of performing a heating treatment at a temperature higher than 40 ° C. and lower than 100 ° C. while the hair is wet with respect to the hair on which the curl design is formed. To do.

  ADVANTAGE OF THE INVENTION According to this invention, in any hair of healthy hair and damaged hair, while being able to suppress the damage of the hair resulting from hair processing, 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, a preferred embodiment 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 includes 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 formed And a third step of performing a heating treatment in a state where the hair is wet, and the conventional oxidation treatment and reduction treatment are not performed.

(First step)
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 lot of cystine, it is very easy to adapt to hair. By applying an aqueous composition containing such hydrolyzed keratin, hair damage can be reduced and excellent hair can be obtained. A deformation effect can be obtained.

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

  The average molecular weight of the hydrolyzed keratin is not particularly limited, but the hydrolyzed keratin preferably has an average molecular weight of 10,000 or more. This is because when the average molecular weight is less than 10,000, it penetrates into the hair when performing the “heating treatment with the hair wet”, which will be described later, but the molecular size is small, so the fixation to the hair is insufficient. As a result, the hair deformation effect may not be sufficiently exhibited.

  The presence or absence of chemical modification in the hydrolyzed keratin is not particularly limited, but it is preferable to use hydrolyzed keratin that has not been chemically modified. When hydrolyzed keratin that has been chemically modified, such as cationization or silylation, is used, the finishing touch (softness, slipperiness) is achieved by performing the “heating treatment with wet hair” described later. This is because the hair deformation effect, which is the main effect, may be reduced due to chemical modification.

  For example, “Proticute U alpha” (produced by Ichimaru Falcos) containing hydrolyzed keratin having an average molecular weight of 35000, “Proticute C alpha” containing one hydrolyzed propylamine having an average molecular weight of 35,000 (cationized modification) (Ichimaru) "Promois WK-GB" (manufactured by Seiwa Kasei Co., Ltd.) containing hydrolyzed keratin with an average molecular weight of 10,000, and "Promois WK-L" (manufactured by Seiwa Kasei Co., Ltd.) containing hydrolyzed keratin with an average molecular weight of 4000 "Promois WK-H" (manufactured by Seiwa Kasei Co., Ltd.) containing hydrolyzed keratin having an average molecular weight of 1000, "Promois WK" (manufactured by Seiwa Kasei Co., Ltd.) containing hydrolyzed keratin having an average molecular weight of 400, Dihydroxymethylsilylpropoxy) hydroxypropyl "Promois WK-HSIG" containing keratin (silylation modification) (manufactured by Seiwa Kasei Co., Ltd.) and "Promois WK-Q" (Seiwa) containing hydroxypropyltrimonium hydrolyzed keratin (cationization modification) having an average molecular weight of 600 Commercially available products such as “Keratide TK-C” (manufactured by Toyo Feather Kogyo Co., Ltd.) containing hydroxypropyltrimonium hydrolyzed keratin (cationized modification) having an average molecular weight of 1000 can be used.

  In addition, as the aqueous composition of the present invention, for example, a solution in which the hydrolyzed keratin is dispersed in a solvent such as water can be used, but from the viewpoint of sufficiently exhibiting the hair damage reduction effect and the deformation effect, As for the compounding quantity of the hydrolysis keratin with respect to the whole aqueous composition, 0.1-20 mass% is preferable.

(Second step)
The method for forming the 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 beauty technique. For example, a method using a heating element, a method using a tool called a rod, and Examples include a method using a heatable rod.

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

  As used herein, “the hair is in a wet state” means “the hair in a wet state after washing with an aqueous composition or shower after the curl design process in the second step, without being dried. Or "in a state where water is immersed in hair that has been wet by washing with an aqueous composition or shower after the curl design process in the second step (that is, in a state in which the hair retains moisture). ".

This heating step is characterized in that heating is performed at a temperature higher than 40 ° C. and lower than 100 ° C.

  This is because when the treatment temperature for fixing the curl design is 40 ° C. or lower, the temperature necessary for obtaining the hair deformation effect (the strength of the curl shape) becomes insufficient, and thus the desired curl design can be obtained. This is because it may not be possible.

  In addition, when the treatment temperature when fixing the curl design is 100 ° C. or higher, the curl design can be reliably formed, but due to the high temperature treatment, unpleasant odor is generated and the hair components are thermally damaged. This is because a good finish (good softness, 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., hair damage can be suppressed in both normal hair and damaged hair, and excellent hair deformation can be achieved. An effect can be obtained. Furthermore, it is possible to suppress the generation of unpleasant odor due to the heating process.

  The temperature in the heating step is preferably 50 ° C. or higher and 90 ° C. or lower from the viewpoint of improving the effect of hair deformation and finishing feeling.

  Further, the treatment time for the heating treatment is preferably 3 minutes or more and 45 minutes or less. This is because if it is less than 3 minutes, there may be a disadvantage that the hair deformation effect becomes insufficient due to insufficient heating time, and if it is longer than 45 minutes, excessive heating time is required. This is because there may be a disadvantage that the feeling of finish is lowered due to the above.

  In addition, when the hair is wet when the hair is wet, the hydrolyzed keratin in the aqueous composition cannot efficiently penetrate into the hair. This is because the hair deformation effect becomes insufficient and a desired curl design may not be obtained.

  Specific examples of this process include the case where a hair designed with curl is immersed in warm water (higher than 40 ° C. and less than 100 ° C.) for heating treatment, or a cover capable of moisturizing the curled hair. The case where a heating process is performed in the enveloped state is mentioned.

(Other ingredients)
The solvent (dispersion medium) used in the aqueous composition of the present invention is not particularly limited, and water is used. However, if necessary, an organic solvent such as ethanol or isopropanol is harmless even if it comes into contact with the human body. You may make it contain in water by density | concentration.

  In addition, the aqueous composition of the present invention includes a pH adjusting component (for example, guanidine carbonate, sodium dihydrogen phosphate, disodium hydrogen phosphate, trisodium phosphate, sesquicarbonate within a range not impairing the effects of the present invention. Arginine, sodium bicarbonate, sodium carbonate, monoethanolamine, triethanolamine, ammonia, 2-amino-2-methyl-1-propanol, sodium hydroxide, tripotassium citrate, trisodium citrate, dihydrogen 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, petrolatum, 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.), sugars and derivatives thereof (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 derivatives thereof (for example, glutamic acid, aspartic acid, glycine, Serine, methionine, trimethylglycine, sodium polyaspartate, lysine sodium 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 derivatives thereof (eg, alginates, 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 (For example, anionic polymer, cationic polymer, nonionic polymer, amphoteric polymer, polyethylene glycol, polypropylene glycol, polyoxypropylene diglyceryl ether, etc.), anionic surfactant (for example, alkyl ether carboxyl) Acid salt, N-acyl glutamic acid, N-acyl methyl taurate, alkyl sulfosuccinate, alkyl sulfate, alkyl ether sulfate, polyoxyethylene alkyl ether phosphate, dicetyl phosphate, etc.), cationic surfactant (for example, , Alkylamine salts, fatty acid amidoamine salts, etc.), amphoteric surfactants (for example, glycine type amphoteric surfactants, aminopropionic acid type amphoteric surfactants, aminoacetic acid betaine type amphoteric surfactants, sulfobetaine type amphoteric surfactants) Etc.), nonionic surface activity (Eg, polyoxyethylene alkyl ether, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene hydrogenated castor oil, alkyl glucoside, new oil type glyceryl monostearate, etc.), dye (eg, tar pigment, natural pigment, etc.), plant extract (For example, chamomile extract, comfrey extract, sage extract, rosemary extract, kakitannin, tea dry distillation liquid, copper chlorophyllin sodium), vitamins (for example, L-ascorbic acid, DL-α-tocopherol, D-pan Tenor, natural vitamin E, etc.), UV absorbers (eg, paraaminobenzoic acid, octyl salicylate, 2-methoxyhexyl paramethoxycinnamate, ferulic acid, etc.), preservatives (eg, benzoic acid, sodium benzoate, salicylic acid, dehydro Acetic acid Sodium roacetate, paraben, phenoxyethanol, methylisothiazolinone, etc.), antioxidants (eg, dibutylhydroxytoluene), sequestering agents (eg, edetate, sodium polyphosphate, phytic acid, etc.), other inorganic compounds ( For example, titanium oxide, silver, platinum, iron chloride, iron oxide, etc.), other organic compounds (eg, urea, hydroxyethylurea, sodium dl-pyrrolidonecarboxylate, copper gluconate, etc.), solvents (eg, benzyl alcohol, etc.) In addition, known cosmetic components such as a propellant (for example, LPG (liquefied petroleum gas), DME (dimethyl ether), nitrogen gas, carbon dioxide gas, etc.) and a fragrance can be blended.

  The aqueous composition of the present invention can be made into a dosage form such as liquid, milk, cream, foam (in-use shape), mist (in-use shape), etc. by a known method, and is in an aerosol form. You can also.

  In addition, you may change the said embodiment as follows.

  The order of the first step and the second step in the above embodiment can be changed as appropriate. That is, after the curl design is formed on the hair, an aqueous composition containing hydrolyzed keratin is applied to the hair on which the curl design is formed, and then the hair on which the aqueous composition is applied is wetted, You may perform a heating process. Even in such a process order, the same effect as in the above-described embodiment can be obtained.

  Moreover, you may cool the hair after the said 3rd process. More specifically, treatments such as leaving at room temperature, applying cool air with a dryer, and soaking hair in cold water are performed.

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

  Moreover, in the said embodiment, although the hair by which the curl design was formed was made into object, the hair processing method of this invention is applicable also when forming a straight design with respect to a comb hair. For example, after applying an aqueous composition containing hydrolyzed keratin to hair, a straight design is formed on the hair to which the aqueous composition is applied. Next, the hair on which the straight design is formed can be heated at a temperature higher than 40 ° C. and lower than 100 ° C. while the hair is wet. 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 subjected to a heating treatment 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 the above-described embodiment can be obtained.

  Hereinafter, the present invention will be described based on examples. In addition, this invention is not limited to these Examples, These Examples can be changed and changed based on the meaning of this invention, and they are not excluded from the scope of the invention. Absent.

(Examples 1-18 and Comparative Examples 1-3)
<Manufacture of hair deformation treatment agent>
The hair deformation treatment agents of Examples 1 to 18 and Comparative Examples 1 to 3 having the composition (mass%) shown in Tables 1 to 3 were prepared by blending water (ion exchange water) and each raw material.

<Preparation of sample hair>
Using a hair bundle (1 g) consisting of straight hair with a length of 25 cm, as a chemical treatment, dyeing was performed twice with a commercially available hair color, and further after a permanent wave treatment with a commercially available permanent solution, 50 The sample hair was immersed in a polyoxyethylene lauryl sodium sulfate aqueous solution (5% by mass) kept at 0 ° C. overnight and then sufficiently washed with water.

<Hair treatment in Examples 1-18 and Comparative Examples 1-3>
Next, the following treatments (A) to (F) were performed on the prepared hair.
(A) First, the prepared hair bundle was wetted with water.
(B) Next, aqueous compositions containing the hydrolyzed keratins of Examples 1-18 and Comparative Examples 1-3 were applied to the hair and allowed to stand at room temperature for 5 minutes.
(C) Next, the hair was rinsed in running water for 30 seconds to keep the hair wet.
(D) Next, the hair was wound around the rod.
(E) Next, the hair in the state wound around the rod was immersed in warm water set to each temperature of Examples 1-18 and Comparative Examples 1-3, and Examples 1-18 and Comparative Examples 1-3 Heating treatment was performed during each treatment time.
(F) Then, after the heating treatment 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, with respect to the hair subjected to the treatments (A) to (F), the treatment temperature and treatment time in the treatment (E) affect the formation of the curl design, the odor, and the finished feeling of the hair treatment. Sensory evaluation was performed about the influence.

  More specifically, (1) strength of curl shape, (2) durability of curl shape, (3) softness, (4) slipperiness, (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 Immediately after the final water washing of the hair treatment, the strength of the curl shape was compared and evaluated according to the following evaluation criteria.
The wave efficiency is very high and the curl design is formed very firmly: ◎
The wave efficiency is high and the curl design is firmly formed: ○
The wave efficiency is low and the curl design is gently formed:
The wave efficiency is very low and the curl design is formed very gently: ×

(2) Persistence of curled shape In order to obtain a state similar to that when about two weeks have passed since hair treatment, the hair dried after the final water washing of hair treatment is immersed in warm water at 60 ° C. for 20 minutes, and time Progressive processing was performed.

In addition, the curl shape when the hair is wet immediately after the final water washing of the hair treatment (when wet immediately after the treatment) and the curl shape when wet after the time lapse treatment (when wet after the time lapse treatment) Comparison was made and evaluated according to the following evaluation criteria.
There is almost no difference between after hair treatment and after time, and the sustainability is very high:
There is a slight difference between immediately after hair treatment and after the passage of time, but sustainability is high: ○
There is a difference between immediately after the hair treatment and after time, and the sustainability is low:
There is a considerable difference between immediately after hair treatment and after the passage of time, and the durability is very low: ×

(3) Softness The softness of the touch when the dried hair bundle was loosened after the final water washing of the hair treatment was evaluated according to the following evaluation criteria.
Very soft: ◎
Soft: ○
Somewhat hard: △
There is hardness: ×

(4) Feeling of slipping When the dried hair bundle was loosened after the final water washing of the hair treatment, the fingering (slipping feeling) was evaluated according to the following evaluation criteria.
Sliding is very good: ◎
Good sliding: ○
Slip is slightly bad: △
Slip is bad: ×

(5) Discoloration / discoloration The discoloration and discoloration of the hair bundle dried after the final water washing of the hair treatment compared to the hair bundle before the hair treatment were evaluated according to the following evaluation criteria.
Very little discoloration and discoloration: ◎
Less fading and discoloration: ○
Slightly discolored and discolored: △
Many discoloration and discoloration: ×

(6) Odor The aroma (odor) of the hair bundle dried after the final water washing of the hair treatment was evaluated according to the following evaluation criteria.
Very little unpleasant odor: ◎
Less unpleasant odor: ○
Slightly unpleasant odor: △
Many unpleasant odors: ×

  In each of the evaluations (1) to (6), “「 ”was evaluated as particularly excellent, and“ ◯ ”was evaluated as excellent. Further, “Δ” and “x” were evaluated as insufficient. 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 “warming treatment for wet hair” in the third step is higher than 40 ° C. and lower than 100 ° C., hair deformation treatment The effect of (curl design formation) (that is, the effect in each evaluation of the above (1) to (2)) is sufficiently obtained, and a good finish feeling (that is, in each evaluation of the above (3) to (4)) (Effect) can be obtained. In addition, the effect of suppressing hair damage (that is, the effect in the evaluation of the above (3) to (5)) is obtained, and the effect of suppressing the generation of unpleasant odor caused by the heating treatment (that is, the effect of (6) above). It can be seen that an effect 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 effect in each evaluation is insufficient.

  In Comparative Example 3 in which the treatment temperature is 100 ° C. or higher, the curl design can be reliably formed. However, since the treatment temperature is high, an unpleasant odor is generated due to the high temperature treatment, It can be seen that because the components are damaged by heat, a good finish feeling (that is, the effects in the evaluations (3) to (4) above) cannot be obtained.

(Examples 19 to 28 and Comparative Examples 4 to 6)
<Manufacture of hair deformation treatment agent>
Water (ion-exchanged water) and each raw material were blended to produce hair deformation treatment agents of Examples 19 to 28 and Comparative Examples 4 to 6 having the compositions (mass%) shown in Tables 4 to 5.

<Preparation of sample hair>
Using a hair bundle (5 g) consisting of 30 cm long hair, chemically dyed twice with a commercially available hair color, and further with a commercially available permanent solution, once with permanent wave treatment, 50 ° C. Sample hair was immersed in a polyoxyethylene lauryl sodium sulfate aqueous solution (5% by mass) kept at 1 night and washed thoroughly with water.

<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 was wetted with water.
(B) Next, 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, the hair was rinsed in running water for 30 seconds to keep the hair wet.
(D) Next, the hair was affixed to a glass plate and fixed in a straight shape.
(E) Next, the hair of the state fixed to the straight shape in the warm water set to each temperature of Examples 19-28 and Comparative Examples 4-6 was immersed, and each of Examples 19-28 and Comparative Examples 4-6 was each immersed. Warming treatment was performed during the treatment time.
(F) Then, after the heating treatment was completed, 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, with respect to the hair subjected to the treatments (a) to (f), the treatment temperature and treatment time in the treatment (e) affect the formation of the straight design, the odor, and the finish of the hair treatment. Sensory evaluation was performed about the influence.

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

(7) Strength of straight shape Compared with the state before hair treatment, the strength of straight shape (no wrinkles) when loosening the dried hair bundle immediately after the final water washing of hair treatment, and according to the following evaluation criteria evaluated.
There is almost no habit: ◎
A little habit remains: ○
The habit remains: △
There is no habit: x

(8) Persistence of straight shape In order to obtain the same level as when about 2 weeks have passed since the hair treatment, the hair dried after the final water washing of the hair treatment is immersed in warm water at 60 ° C. for 20 minutes, and the time Progressive processing was performed.

In addition, the strength of the straight shape when the dried hair bundle is loosened after the final water washing of the hair treatment (no wrinkles immediately after the treatment) and the strength of the straight shape after the time lapse treatment (after the time lapse treatment) Comparison was made and evaluated according to the following evaluation criteria.
There is almost no difference between after hair treatment and after time, and the sustainability is very high:
There is a slight difference between immediately after hair treatment and after the passage of time, but sustainability is high: ○
There is a difference between immediately after the hair treatment and after time, and the sustainability is low:
There is a considerable difference between immediately after hair treatment and after the passage of time, and the durability is very low: ×

(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.
Very shiny: ◎
There is gloss: ○
Somewhat glossy: △
No gloss: ×

  In addition, in each evaluation of said (7)-(9), "(double-circle)" evaluated that it was excellent especially and "(circle)" evaluated that it was excellent. Further, “Δ” and “x” were evaluated as insufficient. The above results are shown in Tables 4-5.

  As shown in Tables 4 to 5, in Examples 19 to 28 in which the temperature of the “heating treatment for wet hair” in the third step is higher than 40 ° C. and lower than 100 ° C., hair deformation treatment The effect of (straight design formation) (that is, the effect in each evaluation of the above (7) to (8)) is sufficiently obtained, and a good finish feeling (that is, in each evaluation of (3) and (9) above) (Effect) can be obtained. In addition, the effect of suppressing hair damage (that is, the effect in the evaluation of the above (3), (5), and (9)) is obtained, and the effect of suppressing the generation of unpleasant odor caused by the heating treatment (that is, the above) It can be seen that the effect in the evaluation of (6) can be obtained.

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

  Further, in Comparative Example 6 in which the treatment temperature is 100 ° C. or higher, although a straight design can be reliably formed, the treatment temperature is high. It can be seen that since the components are damaged by heat, good finish feeling (that is, effects in the evaluations of (3) and (9) above) cannot be obtained.

  As described above, the present invention is particularly useful for hair treatment typified 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 curl design or a straight design on the hair coated with the aqueous composition;
And at least a third step of performing heating treatment at a temperature higher than 40 ° C. and lower than 100 ° C. with respect to the hair on which the curl design or straight design is formed. A hair treatment method characterized by the above. A first step of forming a curl or straight design on the hair;
A second step of applying an aqueous composition containing hydrolyzed keratin to the hair having the curl or straight design formed thereon;
And a third step of performing a heating treatment at a temperature higher than 40 ° C. and lower than 100 ° C. in a state where the hair retains moisture with respect to the hair coated with the aqueous composition. A 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 treatment method according to any one of claims 1 to 3, wherein the hair is cooled after the third step.