JP2017014110A - Composition and method for keratin fibers - Google Patents

Abstract

Kind Code: A1 A keratin fiber composition for hair reshaping, particularly for permanent use, which has sufficient reshaping efficiency for keratin fibers such as hair, causes little damage to the keratin fibers, and can eliminate or reduce offensive odors. provision of goods. (a) at least one compound selected from cysteamine, cysteamine derivatives, salts thereof, and mixtures thereof; and (b) mercaptocarboxylic acids excluding cysteine, mercaptocarboxylic acid derivatives, salts thereof, and at least one compound selected from mixtures thereof; and (c) at least one compound selected from cysteine, cysteine derivatives, salts thereof, and mixtures thereof, wherein the pH is 9.0 A composition for keratin fibers that is less than [Selection figure] None

Description

  The present invention relates to a composition for keratin fibers such as hair, particularly a cosmetic composition, and a reshaping method, particularly a wave forming method.

  In the long-lasting deformation of keratin fibers such as hair, first, a composition containing a suitable reducing agent is used to cleave the disulfide bond -SS- of keratin (cystine) (reduction stage), then The hair thus treated is optionally rinsed, and secondly, reconstituting disulfide bonds by applying an oxidizing composition onto keratin fibers previously under tension (such as curlers) (oxidation stage, (Also called fixation), as a result, ultimately gives the keratin fibers the desired form. This technique thus makes it possible to either wave or straighten the keratin fibers. For example, Japanese Patent Publication No. 62-9566 or U.S. Pat. No. 4,459,284 discloses a standard method for permanent waving or straightening keratin fibers such as hair according to the above process.

  The new shape imparted to the keratin fibers by the chemical treatment described above lasts for a relatively long time, in contrast to simple conventional techniques, which are temporary styling through the use of foams, styling gels, or lacquers, Extremely resistant to cleaning action with water or shampoo.

  Many compositions and methods for the chemical treatment described above have been proposed. In general, they provide good performance on the day of processing.

However, the chemical treatment methods described above, which may not be suitable from the point of view of consumers or beauticians, have various drawbacks such as:
-Insufficient reshaping efficiency, such as weak wave intensity
-Poor ease of use, such as unequal deformation effects depending on the conditions of keratin fibers, such as colored and uncolored keratin fibers
-Degradation or damage of high levels of keratin fibers, due to deformation of the keratin fibers, especially in repeated applications or in combination with other chemical treatments such as oxidative coloring
-Long treatment time, as well
-Malodor of ammonia or sulfur containing compounds during and after the deformation process.

  In particular, sufficient reshaping efficiency, ease of use, and less damage to keratin fibers are important. In fact, the composition for deforming keratin fibers has been improved to provide sufficient reshaping efficiency, for example, strong wave strength and deepness of curled keratin fibers, and differences in keratin fiber conditions Regardless, there is a need to provide ease of use with any type of keratin fibers and to provide excellent hair conditioning effects such as less damage to keratin fibers. In addition, less odor is required.

Japanese Examined Patent Publication No.62-9566 US Patent No. 4459284

  It is an object of the present invention to provide sufficient reshaping efficiency for keratin fibers, for example, strong wave strength and curl depth of curled keratin fibers, and can be applied to any kind of keratin fibers regardless of keratin fiber conditions. Composition for keratin fibers such as hair, preferably cosmetics, which can provide ease of use, can provide excellent hair conditioning effects such as less damage to keratin fibers, and can eliminate or reduce malodor And a reshaping method, particularly a wave forming method.

The above object of the present invention is to
(a) at least one compound selected from the group consisting of cysteamine, cysteamine derivatives, salts thereof, and mixtures thereof;
(b) at least one compound selected from the group consisting of mercaptocarboxylic acids excluding cysteine, mercaptocarboxylic acid derivatives, salts thereof, and mixtures thereof;
(c) A composition for keratin fibers comprising at least one compound selected from the group consisting of cysteine, cysteine derivatives, salts thereof, and mixtures thereof, wherein the pH is less than 9.0, preferably less than 8.5 Can be achieved by the composition, more preferably less than 8.0.

  The composition according to the present invention may have a pH of 7.0 or higher.

  The cysteamine derivative in the composition according to the invention may be N-acylcysteamine, preferably N-acetylcysteamine.

  The concentration of the compound (a) in the composition according to the present invention may be 0.1-1 mol / L, preferably 0.2-0.8 mol / L, more preferably 0.3-0.6 mol / L.

  The mercaptocarboxylic acid in the composition according to the invention may be selected from the group consisting of thioglycolic acid, thiolactic acid, and 3-mercaptopropropionic acid.

  The concentration of the compound (b) in the composition according to the present invention may be 0.01-1 mol / L, preferably 0.05-0.7 mol / L, more preferably 0.1-0.4 mol / L.

  The cysteine derivative in the composition according to the invention may be N-acylcysteine, preferably N-acetylcysteine.

  The concentration of the compound (c) in the composition according to the present invention may be 0.01-1 mol / L, preferably 0.05-0.6 mol / L, more preferably 0.1-0.3 mol / L.

  The molar ratio of (a) compound to (b) compound in the composition may be 10: 1 to 10:10, preferably 10: 2 to 10: 7, more preferably 10: 3 to 10: 5. .

  The molar ratio of (a) compound to (c) compound in the composition may be 10: 1 to 10:10, preferably 10: 1.5 to 10: 6, more preferably 10: 2 to 10: 3. .

  The composition according to the invention may comprise (d) at least one alkaline agent.

  The composition according to the invention may not contain thioglycerin.

  The composition according to the present invention is preferably for keratin fiber reshaping, more preferably for keratin fiber permanent waving.

The present invention is a keratin fiber, preferably a reshaping method for hair, in particular a permanent waving method,
Applying the composition onto keratin fibers;
Optionally rinsing keratin fibers;
Applying an oxidizing composition comprising at least one oxidizing agent onto the keratin fibers;
Optionally rinsing and / or drying the keratin fibers, the composition comprising:
(a) at least one compound selected from the group consisting of cysteamine, cysteamine derivatives, salts thereof, and mixtures thereof;
(b) at least one compound selected from the group consisting of mercaptocarboxylic acids excluding cysteine, mercaptocarboxylic acid derivatives, salts thereof, and mixtures thereof;
(c) at least one compound selected from the group consisting of cysteine, cysteine derivatives, salts thereof, and mixtures thereof, and the pH of the composition is less than 9.0, preferably less than 8.5, more preferably 8.0. Also relates to methods that are less than.

  The pH of the composition used in the method according to the invention may be 7.0 or higher.

  After extensive research, the inventor can provide a specific combination of reducing agents under certain conditions to provide sufficient reshaping efficiency for keratin fibers, such as strong wave strength and curl depth of curled keratin fibers, Regardless of differences in keratin fiber conditions, it can provide ease of use for any type of keratin fiber, provide excellent hair conditioning effects such as less damage to keratin fiber, and eliminate or reduce odor It has been found that a composition for keratin fibers such as hair, preferably a cosmetic composition, and a reshaping method, in particular a waving method, can be provided.

Thus, one embodiment of the present invention provides
(a) at least one compound selected from the group consisting of cysteamine, cysteamine derivatives, salts thereof, and mixtures thereof;
(b) at least one compound selected from the group consisting of mercaptocarboxylic acids excluding cysteine, mercaptocarboxylic acid derivatives, salts thereof, and mixtures thereof;
(c) a composition for keratin fibers comprising at least one compound selected from the group consisting of cysteine, cysteine derivatives, salts thereof, and mixtures thereof, wherein the pH is less than 9.0, preferably 8.5 Less than, more preferably less than 8.0.

Another aspect of the invention is a reshaping method for keratin fibers, preferably hair, in particular a permanent waving method,
Applying the composition onto keratin fibers;
Optionally rinsing keratin fibers;
Applying an oxidizing composition comprising at least one oxidizing agent onto the keratin fibers;
Optionally rinsing and / or drying the keratin fibers, the composition comprising:
(a) at least one compound selected from the group consisting of cysteamine, cysteamine derivatives, salts thereof, and mixtures thereof;
(b) at least one compound selected from the group consisting of mercaptocarboxylic acids excluding cysteine, mercaptocarboxylic acid derivatives, salts thereof, and mixtures thereof;
(c) at least one compound selected from the group consisting of cysteine, cysteine derivatives, salts thereof, and mixtures thereof, and the pH of the composition is less than 9.0, preferably less than 8.5, more preferably 8.0. It is a method that is less than.

  Hereinafter, the compositions and methods according to the present invention will be described in detail.

[Composition]
The composition according to the present invention is preferably a cosmetic composition, preferably for reshaping keratin fibers, more preferably for permanent keratinization of keratin fibers. As the keratin fiber, hair is preferable.

(Reducing agent)
The composition according to the invention comprises a combination of three specific reducing agents. Specifically, the composition of the present invention comprises:
(a) at least one compound selected from the group consisting of cysteamine, cysteamine derivatives, salts thereof, and mixtures thereof;
(b) at least one compound selected from the group consisting of mercaptocarboxylic acids excluding cysteine, mercaptocarboxylic acid derivatives, salts thereof, and mixtures thereof;
(c) at least one compound selected from the group consisting of cysteine, cysteine derivatives, salts thereof, and mixtures thereof.

  Compounds (a) to (c) have different properties from each other. Accordingly, the ranges of the compounds (a) to (c) do not overlap each other. For example, compound (b) is different from compound (a) or (c).

  Examples of cysteamine derivatives include N-acylcysteamine. Examples of the acyl group of N-acylcysteamine include alkanoyl groups such as acetyl, octanoyl, decanoyl, lauroyl, myristoyl, palmitoyl, stearoyl, isostearoyl, and the like. As the cysteamine derivative, N-acetylcysteamine is preferable.

  Mercaptocarboxylic acid means herein a compound having at least one mercapto group and at least one carboxyl group. It may be preferred that the mercaptocarboxylic acid has one mercapto group and one carboxyl group. According to the present invention, mercaptocarboxylic acids do not include cysteine.

  Examples of mercaptocarboxylic acids include thioglycolic acid, thiolactic acid, 3-mercaptopropionic acid, thiotartaric acid, mercaptosuccinic acid (thiomalic acid), dimercaptoadipic acid, and homocysteine. The mercaptocarboxylic acid is preferably selected from the group consisting of thioglycolic acid, thiolactic acid, and 3-mercapropropionic acid.

  As used herein, a mercaptocarboxylic acid derivative means a compound in which the OH moiety of a mercaptocarboxylic acid is substituted with another group such as an alkoxy group and an amino group. Thus, mercaptocarboxylic acid derivatives can be prepared by reaction between a mercaptocarboxylic acid and, for example, an alcohol or an amine.

  Examples of mercaptocarboxylic acid derivatives include mercaptocarboxylates such as methyl thioglycolate, ethyl thioglycolate, glycol monothioglycolate, 1,2-propylene glycol monothioglycolate, glycerol monothioglycolate, glycol mono Thiolactate, glycerol monothiolactate, glycerol mono-3-mercaptopropionate, cysteine methyl ester, cysteine ethyl ester, homocysteine methyl ester and homocysteine ethyl ester; and mercaptocarboxylic acid amides such as thioglycolamide, N-hydroxy List ethylthioglycolamide, 3-mercaptopropionamide, N-hydroxyethyl-3-mercaptopropionamide and cysteine amide be able to.

  An example of a cysteine derivative is N-acylcysteine. Examples of the acyl group of N-acylcysteine include alkanoyl groups such as acetyl, octanoyl, decanoyl, lauroyl, myristoyl, palmitoyl, stearoyl, isostearoyl, and the like. As the cysteine derivative, N-acetylcysteine is preferable.

  Examples of the aforementioned salts include ammonium salts; primary, secondary or tertiary amine salts; alkali metal salts, and alkaline earth metal salts. Examples of the primary, secondary, or tertiary amine include monoethanolamine, diisopropanolamine, and triethanolamine, respectively.

  The above combinations of compounds (a), (b) and (c) are such that the composition according to the present invention provides sufficient reshaping efficiency for keratin fibers such as hair, such as strong wave strength and curl depth of curled keratin fibers. Regardless of differences in keratin fiber conditions, it provides ease of use for any type of keratin fiber and provides excellent hair conditioning effects, such as less damage to keratin fibers, and prevents odors. Needed to eliminate or reduce.

  The concentration of the compound (a) in the composition according to the present invention may be 0.1-1 mol / L, preferably 0.2-0.8 mol / L, more preferably 0.3-0.6 mol / L.

  The concentration of the compound (b) in the composition according to the present invention may be 0.01-1 mol / L, preferably 0.05-0.7 mol / L, more preferably 0.1-0.4 mol / L.

  The concentration of the compound (c) in the composition according to the present invention may be 0.01-1 mol / L, preferably 0.05-0.6 mol / L, more preferably 0.1-0.3 mol / L.

  The amount of the compound (a) in the composition according to the present invention may be 0.1 to 15% by mass, preferably 0.5 to 10% by mass, more preferably 1.0 to 8% by mass, based on the total mass of the composition.

  The amount of the compound (b) in the composition according to the present invention may be 0.1 to 10% by mass, preferably 0.5 to 8% by mass, more preferably 1.0 to 5% by mass, based on the total mass of the composition.

  The amount of the compound (c) in the composition according to the present invention may be 0.1 to 10% by mass, preferably 0.5 to 7% by mass, more preferably 1.0 to 4% by mass, based on the total mass of the composition.

  The molar ratio of (a) compound to (b) compound in the composition according to the present invention is 10: 1 to 10:10, preferably 10: 2 to 10: 7, more preferably 10: 3 to 10: 5. It may be.

  The molar ratio of (a) compound to (c) compound in the composition according to the invention is 10: 1 to 10:10, preferably 10: 1.5 to 10: 6, more preferably 10: 2 to 10: 3. It may be.

(pH)
The pH of the composition according to the invention is less than 9.0, preferably less than 8.5, more preferably less than 8.0.

  Since the pH of the composition according to the present invention is relatively milder than the pH of conventional compositions for keratin fiber reshaping, the damage caused by the composition according to the present invention is higher pH (9.0 or more, (Or even 9.5 or more) less damage caused by conventional compositions. Therefore, the composition according to the present invention can provide a better conditioning effect than conventional compositions.

  Furthermore, by using the above combination of specific reducing agents under a relatively mild (low) pH, any kind of keratin can be used regardless of the difference in the conditions of keratin fibers such as colored and uncolored hair. Better usability can be provided for fibers.

  Furthermore, since the pH of the composition according to the invention is less than 9.0, preferably less than 8.5, more preferably less than 8.0, the malodor caused by the reducing agent can be reduced.

  In addition, since the pH of the composition according to the invention is less than 9.0, preferably less than 8.5, more preferably less than 8.0, the depth of curl that can be formed by the composition for keratin fibers according to the invention can be improved. .

  The composition according to the present invention may have a pH of 7.0 or higher. The pH of the composition according to the present invention is preferably 7.2 or higher, more preferably 7.4 or higher.

  The pH of the composition according to the invention may be 7.0 to less than 9.0, preferably 7.0 to 8.5, more preferably 7.0 to 8.0.

  Accordingly, the composition of the present invention includes water.

  The amount of water in the composition may be 50-99% by weight, preferably 60-95% by weight, more preferably 70-90% by weight, based on the total weight of the composition.

(Thioglycerin)
The composition according to the invention preferably does not contain thioglycerin. The term “free of thioglycerin” means that the composition according to the invention does not contain a substantial amount of thioglycerin.

  The composition according to the present invention may contain 1% by mass or less, preferably 0.1% by mass or less, more preferably 0.01% by mass or less of thioglycerin, and in particular may not contain thioglycerin. Alternatively, the composition according to the present invention may contain thioglycerin at a concentration of 0.1 mol / L or less, preferably 0.01 mol / L or less, more preferably 0.001 mol / L or less, especially 0 mol / L.

  If the composition according to the invention contains a very small amount of thioglycerin or does not contain thioglycerin, malodor caused by thioglycerin during use of the composition according to the invention can be reduced or prevented.

(Alkaline agent)
The composition according to the invention may comprise (d) at least one alkaline agent. Two or more kinds of (d) alkali agents may be used in combination. Thus, a single type of alkaline agent or a combination of different types of alkaline agents can be used.

  The alkaline agent may be an inorganic alkaline agent. The inorganic alkaline agent is selected from the group consisting of ammonia; alkali metal hydroxides; alkaline earth metal hydroxides; alkali metal phosphates such as sodium phosphate or sodium monohydrogen phosphate and monohydrogen phosphate It is preferable.

  Examples of inorganic alkali metal hydroxides include sodium hydroxide and potassium hydroxide. Examples of alkaline earth metal hydroxides include calcium hydroxide and magnesium hydroxide. As the inorganic alkali agent, sodium hydroxide is preferable.

  The alkali agent may be an organic alkali agent. Organic alkali agents include monoamines and derivatives thereof; diamines and derivatives thereof; polyamines and derivatives thereof; basic amino acids and derivatives thereof; oligomers of basic amino acids and derivatives thereof; polymers of basic amino acids and derivatives thereof; urea and derivatives thereof; And guanidine and its derivatives are preferably selected.

  Examples of organic alkaline agents include alkanolamines such as mono, di and triethanolamine and isopropanolamine; urea, guanidine and their derivatives; basic amino acids such as lysine, ornithine or arginine; and the following structure:

(Wherein, R represents an alkylene such as propylene which is optionally substituted by hydroxyl or C ₁ -C ₄ alkyl _{group, R 1, R 2, R} 3 and R ₄ are independently hydrogen atom, Diamines such as those described in alkyl groups or C ₁ -C ₄ hydroxyalkyl groups) (this can be exemplified by 1,3-propanediamine and its derivatives). Arginine, urea and monoethanolamine are preferred.

  The amount of the alkaline agent (d) in the composition may be 0.01 to 15% by mass, preferably 0.05 to 10% by mass, and more preferably 0.1 to 5% by mass with respect to the total mass of the composition.

  The composition according to the invention preferably contains no ammonia. The meaning of “does not contain” is as described above. Since the pH of the composition according to the invention is less than 9.0, preferably less than 8.5, more preferably less than 8.0, the malodor caused by ammonia can be reduced. If the composition according to the invention does not contain ammonia, the malodor caused by ammonia during use of the composition according to the invention can be further reduced or prevented.

(acid)
The composition according to the invention may comprise (e) at least one acid. Two or more kinds of (e) acids may be used in combination. Thus, a single type of acid or a combination of different types of acids may be used.

  (e) The acid can be used to adjust the pH of the composition according to the invention.

  The composition according to the invention preferably comprises (e) an acid when it is necessary to control the pH of the composition to less than 9.0, preferably less than 8.5, more preferably less than 8.0.

  Examples of the acid include any inorganic acid or organic acid generally used in cosmetics, such as citric acid, lactic acid, sulfuric acid, phosphoric acid, or hydrochloric acid (HCl). HCl is preferred.

  (e) The acid may be used in a total amount of 0.1 to 15% by weight, preferably 0.2 to 10% by weight, more preferably 0.3 to 5% by weight, based on the solubility of the acid.

(Other ingredients)
The composition according to the invention may also comprise at least one additional component.

  The amount of the additional component is not limited, but can be 0.1 to 10% by mass relative to the total mass of the composition according to the present invention. Additional ingredients are: oil; thickener; anionic, cationic, nonionic or amphoteric polymer; anionic, cationic, nonionic or amphoteric surfactant; peptide and their derivatives; protein Hydrolysates; swelling agents and penetrants; hair loss inhibitors; antidandruff agents; associative or otherwise thickeners for natural or synthetic oils; suspending agents; sequestering agents; opacifiers; dyes Sunscreens; vitamins or provitamins; fragrances; preservatives, stabilizers; and mixtures thereof.

  The vehicle for the composition according to the invention is preferably an aqueous medium consisting of water and may advantageously contain one or several cosmetically acceptable organic solvents, such organic As the solvent, in particular, alcohol (ethyl alcohol, isopropyl alcohol, benzyl alcohol, phenylethyl alcohol, etc.), or polyol or polyol ether (ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, etc.), propylene glycol or Its ether (such as propylene glycol monomethyl ether), butylene glycol, dipropylene glycol, and diethylene glycol alkyl ether (diethylene glycol monoethyl ether or diethyl). Glycol monobutyl ether) as well as glycerol.

[Method]
The invention also relates to a reshaping method for keratin fibers, preferably hair, in particular a permanent waving method.

The reshaping method according to the present invention comprises
(i) applying the composition described above onto keratin fibers;
(ii) optionally rinsing keratin fibers;
(iii) applying an oxidizing composition comprising at least one oxidizing agent onto the keratin fibers;
(iv) optionally by rinsing and / or drying the keratin fibers.

  Step (i) is for reducing disulfide bonds in keratin fibers.

  In order to reduce disulfide bonds in keratin fibers, the composition used in step (i) can be used as a permanent waving composition for keratin fibers.

  In step (i), the composition described above is applied to keratin fibers. The composition may be applied by any means such as a brush and a comb. After application of the composition, the keratin fibers are left in the keratin fibers as needed, usually for 1 to 1 hour, preferably 10 to 30 minutes, for a specific length of time. It is possible to penetrate.

  In step (ii), the keratin fibers may be preferably rinsed with water.

  According to the present invention, keratin fibers such as hair are subjected to mechanical tension normally used for permanent deformation of keratin fibers before and / or after step (i), preferably before step (iii). Also good.

  Mechanical tension can be applied to the keratin fibers by any means that transforms the keratin fibers into the intended shape. For example, the mechanical tension may be provided by at least one reshaping means selected from the group consisting of curlers, rollers, and clips. The reshaping means can include at least one heater. When keratin fibers are wound around the curler, this winding may be performed for the entire length of the keratin fibers or for example for half the length of the keratin fibers. For example, depending on the desired hairstyle shape and the amount of curl, winding may be performed in a somewhat thick bundle.

  In step (iii), the keratin fibers are oxidized with the oxidizing composition. The oxidizing composition includes at least one oxidizing agent. Preferably, the oxidizing agent is hydrogen peroxide, urea peroxide, alkali metal bromate or ferricyanide, and a peroxygenated salt, such as an alkali metal or alkaline earth metal persulfate, Selected from borates and percarbonates, and peracids and their precursors. The oxidizing composition preferably contains sodium bromate, especially sodium bromate (sodium bromate aqueous solution) as an aqueous solution thereof. The concentration of sodium bromate in the oxidizing composition may be in the range of 0.1 to 20% by weight, preferably 1 to 10% by weight, based on the total weight of the oxidizing composition. In one embodiment, the oxidizing composition comprises hydrogen peroxide, especially hydrogen peroxide as an aqueous solution thereof (aqueous hydrogen peroxide solution). The concentration of hydrogen peroxide in the oxidizing composition may be in the range of 0.1 to 20% by weight, preferably 1 to 10% by weight, based on the total weight of the oxidizing composition.

  The oxidizing composition may be aqueous or non-aqueous. The term “aqueous” means that the developer comprises more than 5% by weight water, preferably more than 10% by weight water, even more advantageously more than 20% by weight water.

  Usually, when the oxidizing composition is aqueous, the pH of the oxidizing composition is less than 8.

  The oxidizing composition can also contain at least one additional component as described in detail above in connection with the composition according to the invention.

  The oxidizing composition may be in various forms, such as shampoos, gels, mousses, thickened lotions and creams.

  According to the present invention, step (iii) is preferably carried out by mild oxidation by applying an oxidizing composition on the keratin fibers with or without a short standing time. The standing time can be 3 to 30 minutes, preferably 5 to 15 minutes.

  In step (iv), the keratin fibers may be preferably rinsed with water and / or dried. The drying of the keratin fibers can be performed by a conventional drying means such as a hair dryer.

  The present invention will be described in more detail by way of examples. However, these examples should not be construed to limit the scope of the invention.

(Examples 1 to 4 and Comparative Examples 1 to 5)
The compositions of Examples 1-4 and Comparative Examples 1-5 shown in Table 1 were prepared by mixing the ingredients shown in Table 1. The numerical values for the amounts of the components shown in Table 1 are based on “mass%” as the active raw material, except for *.

[Evaluation]
The compositions according to Examples 1-4 and Comparative Examples 1-5 were used for permanent waving of hair.

  Each of the compositions according to Examples 1-4 and Comparative Examples 1-5 was applied in an amount of 100 μL to 20 fibers of a Chinese hair bundle, the hair was wrapped around a rod and the hair was left for 15 minutes. . The hair was then rinsed with water. Next, a neutralizing agent was applied to the hair and the hair was left for 10 minutes. Thereafter, the rod was removed, and the hair was rinsed with water and dried.

  Panelists evaluated cosmetic properties such as wave strength, depth, hair quality tolerance, conditioning and malodor provided by the compositions according to Examples 1-4 and Comparative Examples 1-5 according to the criteria shown below. Note that the cosmetic properties provided by the composition according to Comparative Example 1 were used as a benchmark.

(Wave intensity)
Wave intensity: The more curls that are formed, the stronger the wave intensity.

The criteria for evaluation are as follows.
++: Remarkably strong wave intensity
+: Strong wave intensity
0: Benchmark
-: Poor wave intensity
-: Remarkably poor wave intensity

(depth)
Depth (clear wave): After the permanent waving method, the shorter the hair length, the greater the depth.

The criteria for evaluation are as follows.
++: Remarkably good clear wave
+: Good clear wave
0: Benchmark
-: Less clear wave
-: Remarkably unclear wave

(Hair quality tolerance)
Hair quality tolerance: using the same length of hair bundles, after the permanent waving method on the same diameter rod, the appearance of the bundles for virgin hair, colored hair, and colored and permanent hair ( The smaller the difference in wave intensity and depth), the greater the hair quality tolerance.
++: Remarkably large hair quality tolerance
+: Greater hair quality tolerance
0: Equivalent to benchmark
-: Smaller hair quality tolerance
-: Remarkably small hair quality tolerance

(conditioning)
Conditioning: After the permanent waving method, panelists evaluated the feel of the hair.
++: Remarkably high conditioning
+: Higher conditioning
0: Equivalent to benchmark
-: Lower conditioning
-: Remarkably low conditioning

(Odor)
Odor: Panelists evaluated the remaining odor.

The criteria for evaluation are as follows.
++: Remarkably low odor
+: Less stink
0: Equivalent to benchmark
-: More stench
-: Extremely bad odor

  The evaluation results are shown in Table 1.

  The cosmetic properties provided by the compositions according to Examples 1 to 4 because the compositions according to Examples 1 to 4 have a pH of less than 9.0 and comprise a combination of compounds (a), (b) and (c) Is excellent.

  Specifically, the composition according to Example 1 comprises a combination of cysteamine HCl {compound (a)}, ammonium thiolactate {compound (b)} and cysteine {compound (c)} and has a pH of 7.5. . Therefore, the composition according to Example 1 can provide strong wave strength, deep curl, and a better conditioning effect to hair regardless of the type of hair, and does not give malodor.

  The composition according to Example 2 comprises a combination of cysteamine HCl {compound (a)}, ammonium thioglycolate {compound (b)} and cysteine {compound (c)} and has a pH of 7.5. Therefore, the composition according to Example 2 can provide strong wave strength, deep curl, and a better conditioning effect to hair regardless of the type of hair, and does not give a bad odor.

  The composition according to Example 3 comprises a combination of cysteamine HCl {compound (a)}, ammonium thioglycolate and ammonium thiolactate {compound (b)} and cysteine {compound (c)} and has a pH of 7.5. Therefore, the composition according to Example 3 can provide strong wave strength, deep curl, and a better conditioning effect to hair regardless of the type of hair, and does not give a bad odor.

  The composition according to Example 4 comprises cysteamine HCl {compound (a)}, ammonium thiolactate {compound (b)} and a combination of cysteine and acetylcysteine {compound (c)} and has a pH of 7.5. Therefore, the composition according to Example 4 can provide deep curl and a better conditioning effect to hair regardless of the type of hair, and does not give a bad odor.

  The compositions according to Comparative Examples 1 to 4 have a pH of less than 9.0. However, since they do not contain all of the compounds (a), (b) and (c), the cosmetic properties provided by the compositions according to Comparative Examples 1-4 are provided by the compositions according to Examples 1-4 Inferior to the cosmetic properties that are made.

  Specifically, the composition according to Comparative Example 1 contains only cysteamine HCl {compound (a)}. Thus, the composition according to Comparative Example 1 provides hair with weaker wave strength, shallower curl, and worse conditioning effect, to a different extent depending on the type of hair, for example compared to Example 1, Gives more stench.

  The composition according to Comparative Example 2 contains only cysteamine HCl {compound (a)} and ammonium thiolactate {compound (b)}. Thus, the composition according to Comparative Example 2 provides hair with weaker wave strength, shallower curl, and worse conditioning effect, to a different extent depending on the type of hair, for example compared to Example 1, Gives more stench.

  The composition according to Comparative Example 3 contains only cysteamine HCl {compound (a)} and cysteine {compound (c)}. Thus, the composition according to Comparative Example 3 provides a weaker wave intensity, shallower curl, and worse conditioning effect to the hair and gives more malodor compared to Example 1, for example.

  The composition according to Comparative Example 4 contains only ammonium thiolactate {compound (b)} and cysteine {compound (c)}. Thus, the composition according to Comparative Example 4 provides the hair with weaker wave strength, shallower curl, and worse conditioning effect, to a different extent depending on the type of hair, for example compared to Example 1, Gives more stench.

  The composition according to Comparative Example 5 contains all of the compounds (a), (b) and (c). However, since the pH is 9.5, the cosmetic properties provided by the composition according to Comparative Example 5 are inferior to those provided by the compositions according to Examples 1-4.

  By comparing the evaluation results for Examples 1 to 4 and Comparative Examples 1 to 5, the use of a composition having a pH of less than 9.0 and containing all of the compounds (a), (b) and (c) It is shown to be necessary to provide an effect.

Claims (15)

(a) at least one compound selected from the group consisting of cysteamine, cysteamine derivatives, salts thereof, and mixtures thereof;
(b) at least one compound selected from the group consisting of mercaptocarboxylic acids excluding cysteine, mercaptocarboxylic acid derivatives, salts thereof, and mixtures thereof;
(c) a composition for keratin fibers comprising at least one compound selected from the group consisting of cysteine, cysteine derivatives, salts thereof, and mixtures thereof, wherein the pH is less than 9.0, preferably 8.5 Less than, more preferably less than 8.0.   2. The composition according to claim 1, wherein the pH is 7.0 or more.   The composition according to claim 1 or 2, wherein the cysteamine derivative is N-acylcysteamine, preferably N-acetylcysteamine.   The concentration of the compound (a) in the composition is 0.1 to 1 mol / L, preferably 0.2 to 0.8 mol / L, more preferably 0.3 to 0.6 mol / L. The composition according to item.   5. The composition according to any one of claims 1 to 4, wherein the mercaptocarboxylic acid is selected from the group consisting of thioglycolic acid, thiolactic acid, and 3-mercaptopropionic acid.   The concentration of the compound (b) in the composition is 0.01 to 1 mol / L, preferably 0.05 to 0.7 mol / L, more preferably 0.1 to 0.4 mol / L. The composition according to item.   The composition according to any one of claims 1 to 6, wherein the cysteine derivative is N-acylcysteine, preferably N-acetylcysteine.   The concentration of the compound (c) in the composition is 0.01 to 1 mol / L, preferably 0.05 to 0.6 mol / L, more preferably 0.1 to 0.3 mol / L. The composition according to item.   The molar ratio of the compound (a) to the compound (b) in the composition is 10: 1 to 10:10, preferably 10: 2 to 10: 7, more preferably 10: 3 to 10: 5. 9. The composition according to any one of claims 1 to 8, wherein   The molar ratio of the compound (a) to the compound (c) in the composition is 10: 1 to 10:10, preferably 10: 1.5 to 10: 6, more preferably 10: 2 to 10: 3. 10. The composition according to any one of claims 1 to 9, wherein   11. The composition according to any one of claims 1 to 10, comprising (d) at least one alkaline agent.   12. The composition according to any one of claims 1 to 11, which does not contain thioglycerin.   13. Composition according to any one of the preceding claims, for reshaping keratin fibers, preferably for permanent keratin fiber waves. A keratin fiber, preferably a reshaping method for hair, in particular a permanent waving method,
Applying the composition onto the keratin fibers;
Optionally rinsing the keratin fibers;
Applying an oxidizing composition comprising at least one oxidizing agent onto the keratin fibers;
Optionally rinsing and / or drying the keratin fibers, the composition comprising:
(a) at least one compound selected from the group consisting of cysteamine, cysteamine derivatives, salts thereof, and mixtures thereof;
(b) at least one compound selected from the group consisting of mercaptocarboxylic acids excluding cysteine, mercaptocarboxylic acid derivatives, salts thereof, and mixtures thereof;
(c) at least one compound selected from the group consisting of cysteine, cysteine derivatives, salts thereof, and mixtures thereof, wherein the pH of the composition is less than 9.0, preferably less than 8.5, more preferably The method is less than 8.0.   15. The method according to claim 14, wherein the pH of the composition is 7.0 or higher.