JP2015040207A - Hair treatment compositions containing low molecular weight amphoteric copolymer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide hair treatment compositions, particularly hair dyeing pretreatment compositions, which have better substantivity and fastness than the prior art and can maintain a good texture even under a humid atmosphere.SOLUTION: A hair treatment composition contains a water soluble amphoteric copolymer obtained by copolymerization of a cationic monomer (A) represented by the general formula (1) in the figure, an acrylamide (B), and an anionic monomer (C). The copolymer has a weight average molecular weight of 2,000-5,000, and a ratio of the weight average molecular weight (Mw) to the number average molecular weight (Mn), namely, Mw/Mn, of 15 or less.

Description

  The present invention relates to a hair treatment composition, and more particularly to a hair treatment composition that has improved dyeability and fastness and that can maintain a good feel even in a humid atmosphere.

  For the purpose of improving the feel of hair, all the polymer ingredients conventionally used in hair cosmetics have a molecular weight of hundreds of thousands to several millions and are apparently attached to the hair surface. It is possible to feel gloss and moisture. However, it has not been possible to provide a natural finish feeling that feels the suppleness and smoothness of the hair. Patent Document 1 discloses a hair cosmetic containing a specific low molecular weight cationic polymer for the purpose of improving combing property, smoothing hair without causing stickiness, and imparting a natural finish feeling. Yes.

  Patent Document 2 discloses a hair dye composition containing an acylated collagen polypeptide and a cationic polymer. Patent Document 3 discloses a cationic fiber affinity having an oxidation dye precursor and a molecular weight of 1200 for the purpose of leveling. Patent Document 4 discloses an oxidative dye composition containing a polymer, which contains a specific low molecular weight cationic polymer for the purpose of improving dyeability and fastness.

  On the other hand, in Patent Document 5, the molecular weight is 1 in order to improve the fingering at the time of shampooing, and to obtain good conditioning characteristics such as dry touch, gloss and curl retention, and good compatibility with an anionic surfactant-containing shampoo formulation. Ten to ten million amphoteric electrolyte polymers are shown.

  In Patent Document 6, for the purpose of obtaining a good curl shape, a reducing agent and one agent made of an ampholyte terpolymer comprising diallyldimethylammonium chloride-acrylamide-acrylic acid, an oxidizing agent and a betaine or imidazoline type amphoteric interface. In Patent Document 7, a composition for permanent wave composed of two active agents is composed of a dimethyldiallylammonium chloride-acrylic acid copolymer having an average molecular weight of 50,000 to 5,000,000 and a protein hydrolyzate. It has been shown that the hair dye or decoloring composition is excellent in leveling and fastness, reduces hair damage, and provides a good feel.

JP 2006-347955 A Japanese Patent Laid-Open No. 7-17836 JP 7-316029 A JP 2007-126384 A JP-A-6-107526 JP 2000-53543 A JP 2002-338443 A

  When a low molecular weight cationic polymer that has been proposed so far is used in hair cosmetics to improve the feel, the combing and moisturizing properties are improved, but the hygroscopicity is higher than the high molecular weight cationic polymer and the humidity is high. May cause stickiness in the atmosphere. Further, when a low molecular weight cationic polymer is used for a hair dye composition or a pre-treated hair dye, the leveling effect can be obtained, but the feeling under high humidity is not sufficient. On the other hand, the ampholyte copolymer is not satisfactory in terms of fastness, although leveling can be obtained.

  In this situation, the present inventors provide a hair treatment composition, particularly a pre-dyeing composition, which has improved dyeability and fastness and can maintain a good feel even in a humid atmosphere. , Earnestly studied. As a result, it was found that these problems can be improved by using an intramolecular amphoteric water-soluble copolymer having a low molecular weight and a specific molecular weight distribution in a hair treatment composition, particularly a hair dyeing pretreatment composition. The present invention has been completed.

（式中、Ｒ_１およびＲ_２はそれぞれ独立して水素原子またはメチル基を表し、Ｒ_３およびＲ_４はそれぞれ独立して、水素原子または炭素数１〜６のアルキル基を表す。Ｘ⁻は有機酸または無機酸の陰イオンを表す。）
下記一般式（２）で表されるノニオン性モノマー（Ｂ）、

（式中、Ｒ_５は水素原子またはメチル基を表し、Ｒ_６およびＲ_７はそれぞれ独立して水素原子または炭素数１〜６のアルキル基を表す。）
およびアニオン性モノマー（Ｃ）を共重合することで得られる水溶性両性共重合体であって、該共重合体の重量平均分子量が２，０００〜５，０００であり、かつ、重量平均分子量（Ｍｗ）と数平均分子量（Ｍｎ）の比（Ｍｗ／Ｍｎ）が１５以下である水溶性両性共重合体を含む毛髪処理用組成物に関するものである。 Therefore, the present invention
A cationic monomer (A) represented by the following general formula (1),

(Wherein, R ₁ and R ₂ each independently represents a hydrogen atom or a methyl group, R ₃ and R ₄ each independently represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms .X ^- is (Represents anions of organic or inorganic acids.)
Nonionic monomer (B) represented by the following general formula (2),

(In the formula, R ₅ represents a hydrogen atom or a methyl group, and R ₆ and R ₇ each independently represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms.)
And a water-soluble amphoteric copolymer obtained by copolymerizing an anionic monomer (C), the copolymer having a weight average molecular weight of 2,000 to 5,000, and a weight average molecular weight ( The present invention relates to a hair treatment composition comprising a water-soluble amphoteric copolymer having a ratio (Mw / Mn) of Mw) to number average molecular weight (Mn) of 15 or less.

  The composition for hair treatment or the composition before hair treatment containing the low molecular weight intramolecular amphoteric water-soluble copolymer of the present invention is controlled to a specific molecular weight distribution, so that the conventional low molecular weight cationic polymer and amphoteric electrolyte copolymer Compared with a hair treatment composition containing coalescence, the dyeability and fastness are improved, and a good feel can be maintained even in a humid atmosphere.

  As the cationic monomer (A) used for the production of the low molecular weight amphoteric water-soluble copolymer of the present invention, inorganic salts or organic acid salts of secondary amines such as diallylamine and dimethallylamine, diallylmethylamine, diallylethylamine, Inorganic salts or organic acid salts of tertiary amines such as diallylbutylamine, diallyldimethylammonium chloride, diallyldimethylammonium bromide, diallyldiethylammonium chloride, diallyldiethylammonium bromide, diallyldibutylammonium chloride, diallyldibutylammonium bromide 4 A class ammonium salt is mentioned. Among these, diallyldimethylammonium chloride is particularly preferable.

  Nonionic monomers (B) include (meth) acrylamide, N-methyl (meth) acrylamide, N, N-dimethyl (meth) acrylamide, N, N-diethyl (meth) acrylamide, N, N-dipropyl (meth) Examples include acrylamide, N-isopropyl (meth) acrylamide, N-methylol acrylamide, N-alkyl acrylamide, diacetone acrylamide, 2-hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate, and the like. Of these, acrylamide is particularly preferred.

  Examples of the anionic monomer (C) include (meth) acrylic acid, 2- (meth) acrylamide-2-methylpropanesulfonic acid, crotonic acid, sodium vinylsulfonate, acrylamide glycolic acid, 2-acrylamido-2-methylpropanephosphone. Examples include acid, sodium vinylphosphonate, and allylphosphonic acid. Among these, (meth) acrylic acid is particularly preferable.

The low molecular weight amphoteric water-soluble copolymer used in the present invention can be produced by copolymerizing the monomers (A), (B) and (C) in the presence of a polymerization initiator. A preferred composition ratio of the structural unit derived from each monomer in the copolymer is:
The structural unit derived from (A) is 10 to 70 mol%, more preferably 20 to 50 mol%.
The structural unit derived from (B) is 20 to 80 mol%, more preferably 25 to 70 mol%.
The structural unit derived from (C) is 10 to 70 mol%, more preferably 20 to 50 mol%.
It is. In order to produce the copolymer of the present invention, other polymerizable unsaturated monomers may be copolymerized in addition to (A) to (C).

  The water-soluble amphoteric copolymer of the present invention has a weight average molecular weight of 2,000 to 5,000, and the ratio of the weight average molecular weight (Mw) to the number average molecular weight (Mn) (Mw / Mn) is more preferably 15 or less. Is 10 or less. For the measurement of the weight average molecular weight, gel permeation chromatography (hereinafter abbreviated as GPC) is used, and the molecular weight distribution can be calculated from the weight average molecular weight and the number average molecular weight measured by GPC.

In order to obtain such a copolymer having a low molecular weight and a small molecular weight distribution, it is preferable to use a redox initiator as a polymerization initiator.
Redox initiators include hydrogen peroxide-ammonia, hydrogen peroxide-ethylamine, hydrogen peroxide-iron (II) salt, peroxodisulfate-sodium sulfite, peroxodisulfate-sodium hydrogensulfite, peroxo Disulfate-triethanolamine, peroxodisulfate-iron (II) salt, sodium perchlorate-sodium sulfite, cerium (IV) sulfate-alcohols, cumene hydroperoxide-iron (II) salt, benzoyl peroxide -Dimethylaniline and the like. Among these, peroxodisulfate-sodium sulfite, peroxodisulfate-sodium hydrogensulfite, peroxodisulfate-triethanolamine, peroxodisulfate-iron (II) salt, sodium perchlorate-sulfurous acid Sodium is preferable, and peroxodisulfate-sodium sulfite and peroxodisulfate-sodium hydrogensulfite are more preferable. The preferable usage-amount of a polymerization initiator is 0.1-20 mass% with respect to the total amount of a monomer.

  The redox initiator may be added at the same time as the monomer or before and after the addition, and may be added in any form, such as continuously added by dropping, or intermittently divided. . However, in the present invention, as one method for controlling the molecular weight distribution, it is preferable to continuously supply one or more redox initiators and monomers simultaneously to the reactor.

  In addition, by polymerizing in the presence of an alcohol chain transfer agent, it is possible to obtain an amphoteric water-soluble copolymer having a molecular weight distribution controlled under polymerization conditions at a relatively moderate temperature. Examples of the alcohol chain transfer agent include isopropyl alcohol (IPA), sec-butyl alcohol and the like, and these may be used as a polymerization solvent. The chain transfer agent is preferably used in an amount of 150 to 950% by weight based on the total amount of monomers.

  The polymerization temperature may be appropriately selected from the range of 10 to 80 ° C., and the polymerization time may be about 3 to 20 hours.

  After completion of the polymerization, a copolymer liquid phase separated into a monomer liquid phase and a copolymer liquid phase is separated, and this is washed with 30 to 95% by mass of a lower alcohol aqueous solution to obtain a copolymer liquid phase. It is also possible to increase the degree of purification by further removing the monomer and the ultra-low molecular weight copolymer, and further reduce the molecular weight distribution.

  By these polymerization methods, a water-soluble amphoteric copolymer having a weight average molecular weight of 2,000 to 5,000 and a molecular weight distribution controlled to 15 or less can be obtained according to the present invention, but is not necessarily limited thereto. .

  The weight average molecular weight of dimethyldiallylammonium chloride and acrylamide copolymer and dimethyldiallylammonium chloride, acrylamide, and acrylic acid terpolymers blended in the past has a large molecular weight on the order of several hundred thousand. Is. For example, the weight average molecular weight and molecular weight distribution of Marcote 550 (manufactured by Nalco) and ME polymer T-343 (manufactured by Toho Chemical Industry Co., Ltd.) are 1.6 million (15.2) and 1.3 million (12.1). The polymer is very different from the low molecular weight amphoteric water-soluble copolymer having a weight average molecular weight of 2,000 to 5,000 and a molecular weight distribution controlled to 15 or less.

  The blending amount of the water-soluble amphoteric copolymer in the hair treatment composition of the present invention is not particularly limited, but is preferably about 0.01 to 5% by weight, particularly 0.1% with respect to the total amount of the hair treatment composition. -2.0 mass% is preferable. If it is less than 0.01% by mass, the effect is not sufficiently exhibited, and if it exceeds 5% by mass, the feeling after use becomes worse.

  The hair treatment composition and hair dyeing pretreatment composition of the present invention include, in addition to the above-described essential low molecular weight intramolecular amphoteric water-soluble polymer, other components commonly used in hair treatment compositions, for example, Oils such as avocado oil, palm oil, jojoba oil, carnauba wax, lanolin, liquid paraffin, isostearyl palmitate, isostearyl alcohol, higher alcohols such as cetyl alcohol, stearyl alcohol behenyl alcohol, glycerin, sorbitol, polyethylene glycol, pyrrolidone carboxylic acid and Its salts, collagen, hyaluronic acid and its salts, moisturizers such as chondroitin sulfate, UV absorbers such as aluminum paradimethylaminobenzoate, urocanic acid, ethyl diisopropyl cinnamate, antioxidants such as parahydroxyanisole, alkyl (carbon Number 8-2 ) Sulfate, alkyl (carbon number 8-24) ether sulfate, alkyl (carbon number 8-24) benzenesulfonate, alkyl (carbon number 8-24) phosphate, polyoxyalkylene alkyl (carbon number 8-8) 24) Ether phosphate, alkyl (carbon number 8-24) sulfosuccinate, polyoxyalkylene alkyl (carbon number 8-24) ether sulfosuccinate, acyl (carbon number 8-24) glutamate, acyl (carbon Number 8-24) isethionate, acyl (carbon number 8-24) sarcosine salt, acyl (carbon number 8-24) taurine salt, acyl (carbon number 8-24) methyl taurate, stearic acid Anionic surfactant such as sodium, alkanolamide, glycerin fatty acid ester, polyoxyalkylene alkyl ether, polyoxy Lukylene glycol ether, polyethylene glycol isostearate, polyoxyalkylene sorbitan fatty acid ester, sorbitan fatty acid ester, polyoxyalkylene sorbit fatty acid ester, sorbit fatty acid ester, polyoxyalkylene glycerin fatty acid ester, polyoxyalkylene fatty acid ester, polyoxyalkylene alkyl Nonionic surfactants such as phenyl ether, tetrapolyoxyalkylene ethylenediamine condensates, sucrose fatty acid ester, polyoxyalkylene fatty acid amide, polyoxyalkylene glycol fatty acid ester, polyoxyalkylene castor oil derivative, polyoxyalkylene hardened castor oil derivative , Methylparaben, butylparalabene, phenoxyethanol and other preservatives, ascor Whitening agents such as vinic acid derivatives, glycyrrhizic acid derivatives, salicylic acid derivatives, anti-inflammatory agents such as hinokitiol and zinc oxide, thickeners such as carboxyvinyl polymer and hydroxypropylcellulose, colorants such as titanium yellow and safflower red, edetate A metal sequestering agent such as pH adjuster water, alcohol, fragrance and the like can be appropriately blended as necessary, and can be produced by a conventional method.

Hereinafter, the present invention will be described in detail with reference to examples. The present invention is not limited to this. The blending amount is mass% unless otherwise specified.
<GPC measurement conditions>
Column: OHpak SB-806MHQ (manufactured by Showa Denko KK)
Column temperature: 40 ° C
Detector: RI
Solvent: 0.5M acetic acid + 0.1M Na nitrate
Flow rate: 1.0 ml / min Sample concentration: 0.5%
Injection volume: 50 μl
Standard: Pullulan (Showa Denko KK; Shodex STANDARD P-82)

Synthesis example 1
A glass flask (hereinafter referred to as “reactor”) having a capacity of 3 liters equipped with a thermometer, a reflux condenser and a stirrer was charged with 665 g of water and 1,084 g of IPA, and heated to 60 ° C. Next, 74.6 g (1.05 mol) of acrylamide (hereinafter, AAm), 224 g (0.9 mol) of 65% diallyldimethylammonium chloride (hereinafter, DADMAC) aqueous solution, 75.7 g (1) of acrylic acid (hereinafter, AA) 0.05 mol) and 80 g of water, 89 g of 20% sodium peroxodisulfate (hereinafter referred to as Na ₂ S ₂ O ₈ ) aqueous solution, 192 g of 20% anhydrous sodium bisulfite (hereinafter referred to as NaHSO ₃ ) aqueous solution, Over a period of 3 hours from a separate dropping funnel, the mixture was added dropwise to the reactor with stirring. After completion of the dropping, the reaction solution was kept at 60 ° C. for 6 hours to complete the polymerization. After completion of the polymerization, stirring was stopped, the lower phase solution separated into two phases was separated, washed with 565 g of 50% IPA aqueous solution, allowed to stand, and then phase separated to separate the lower phase solution. This washing operation was performed once more to obtain a polymer solution containing the lower phase.
An equal amount of water was added thereto, and IPA was distilled off under reduced pressure at 80 ° C. under reduced pressure to adjust the effective polymer content to 20%. As a result of measuring GPC of the obtained polymer aqueous solution, it was Mw = 3,000 and Mw / Mn = 6.0. The results are shown in Table 1 (Sample No. 1 in Table 1).

Synthesis example 2
The reactor was charged with 753 g of water and 1,033 g of IPA and heated to 60 ° C. Next, a mixed solution of 117.3 g (1.65 mol) of AAm, 187.1 g (0.75 mol) of 65% DADMAC aqueous solution, 43.2 g (0.60 mol) of AA, and 86 g of water, and 20% Na ₂ S ₂ 85 g of O ₈ aqueous solution and 183 g of 20% NaHSO ₃ aqueous solution were dropped into the reactor with stirring over 3 hours from separate dropping funnels. All subsequent operations were performed in the same manner as in Synthesis Example 1 to obtain an aqueous polymer solution having Mw = 2,500 and Mw / Mn = 5.0. The results are shown in Table 1 (Sample No. 2 in Table 1).

Synthesis example 3
The reactor was charged with 792 g of water and 1,184 g of IPA and heated to 60 ° C. Next, a mixed solution of 53.3 g (0.75 mol) of AAm, 299.3 g (1.20 mol) of 65% DADMAC aqueous solution, 75.7 g (1.05 mol) of AA, and 69 g of water, and 20% Na ₂ S ₂ 97 g of O ₈ aqueous solution and 210 g of 20% NaHSO ₃ aqueous solution were dropped into the reactor with stirring over 3 hours from separate dropping funnels. All subsequent operations were performed in the same manner as in Synthesis Example 1 to obtain an aqueous polymer solution having Mw = 2,500 and Mw / Mn = 5.0. The results are shown in Table 1 (Sample No. 3 in Table 1).

Synthesis example 4
The reactor was charged with 733 g of water and 1,135 g of IPA and heated to 60 ° C. Next, a mixed solution of 53.3 g (0.75 mol) of AAm, 261.8 g (1.05 mol) of 65% DADMAC aqueous solution, 86.5 g (1.20 mol) of AA, and 75 g of water, and 20% Na ₂ S ₂ 93 g of O ₈ aqueous solution and 201 g of 20% NaHSO ₃ aqueous solution were dropped into the reactor with stirring over 3 hours from separate dropping funnels. All subsequent operations were performed in the same manner as in Synthesis Example 1 to obtain an aqueous polymer solution having Mw = 4,000 and Mw / Mn = 8.0. The results are shown in Table 1 (Sample No. 4 in Table 1).

Comparative Synthesis Example 1
The reactor was charged with 1,898 g of water and heated to 60 ° C. Next, a mixed solution of 74.6 g (1.05 mol) of AAm, 224.4 g (0.90 mol) of 65% DADMAC aqueous solution, 75.7 g (1.05 mol) of AA, and 80 g of water, and 20% Na ₂ S ₂ 89 g of O ₈ aqueous solution was added dropwise from the dropping funnel to the reactor over 3 hours with stirring. All subsequent operations were performed in the same manner as in Synthesis Example 1 to obtain an aqueous polymer solution having Mw = 4,600 and Mw / Mn = 23.0. The results are shown in Table 1 (Sample No. 5 in Table 1).

Examples 1 to 4, Comparative Examples 1 and 2
Using the low molecular weight intramolecular amphoteric water-soluble copolymer of Sample Nos. 1 to 5 obtained in Synthesis Examples 1 to 4 and Comparative Synthesis Example 1, the composition for hair treatment (pretreatment agent for hair dyeing) has the composition shown in Table 2. ) In the usual way (after dissolving the thickener in purified water, add various ingredients and mix uniformly, and adjust the pH), and dyeability, fastness, hair damage, use Later feel was evaluated. As a comparative product, polyquatanim-39 (ME polymer T-343 (effective content 10%, manufactured by Toho Chemical Industry Co., Ltd .; Mw = 1,300, Mw / Mn = 12)) was used as a conventional intramolecular amphoteric water-soluble copolymer. Evaluated. In addition, the intramolecular amphoteric water-soluble copolymer to be blended was blended in terms of an effective component. Moreover, each evaluation was implemented with the following method.

<Dyeability test>
A pretreatment agent was applied to the white hair bundle (15 g of pretreatment agent for 2 g of hair) and left at 25 ° C. for 5 minutes. After 5 minutes, the pretreatment agent was washed away with water and towel-dried. 15 g of acidic hair dye (Tiara Treatment Color Rinse Gray (manufactured by Shiseido Professional Co., Ltd.)) was applied to this hair bundle and left at 30 ° C. for 10 minutes. After 10 minutes, the hair bundle was washed twice with shampoo and air-dried. The color of the hair bundle was compared with the color when no pretreatment agent was used. The results are shown in Table 2.
◎: Very well dyed ○: Slightly dyed △: No difference in dyeing ×: Bad dyeing

<Robustness test>
The hair bundle used in the dyeability test was immersed in an aqueous solution of 10% sodium lauryl ether sulfate (Arscope NS-230 (manufactured by Toho Chemical Co., Ltd.)) and shaken at 30 ° C. for 30 minutes. Thereafter, it was washed with water and allowed to air dry. This operation was repeated three times and compared with the degree of color fading of the hair bundle not using the pretreatment agent. The results are shown in Table 2.
◎: Less color fading ○: Slightly less fading △: No difference in color fading level ×: More fading than comparative products

<Hair damage (tensile strength)>
The hair bundle used in the dyeability test was measured for hair strength using a hair tension tester (KES-GI-SH) manufactured by Kato Tech Co., Ltd. Compared with the degree. The results are shown in Table 2.
A: Strength increased.
○: There is no difference in strength. Δ: The strength is slightly reduced. X: The strength is significantly reduced.

<Feel and gloss after use>
The hair bundle used in the dyeability test was left in a constant humidity and humidity room at a humidity of 80% and a temperature of 25 ° C. for 12 hours, and the feeling before and after being left was compared with a hair bundle not using a pre-treated product. The results are shown in Table 2.
(Feel before and after leaving)
◎: supple and crisp feel ○: crisp feel △: no difference ×: somewhat sticky

  Examples of the pretreatment composition for hair according to the present invention and a two-part oxidative hair dye are given below. Any of them can give a natural finished feel after use.

Example 5
<Composition for hair pretreatment>
Product of the present invention (sample number 1, converted into effective amount) 2.5
Benzyl alcohol 3.0
Liquid paraffin 0.5
Dipropylene glycol 1.0
Dimethicone 1.5
Hydroxypropyl cellulose 3.0
2-Hydroxy-n-caprylic acid 1.0
n-Methylpyrrolidone 1.0
Sucrose fatty acid ester 0.1
d-limonene 0.5
Ammonia water Adjusted to pH 10 Fragrance Appropriate amount Purified water Remaining

Example 6
POE (2) sodium lauryl ether sulfate 6.0
Palm oil fatty acid methyl taurine sodium 3.0
Lauroamphoacetate betaine 3.0
Palm oil fatty acid diethanolamide 1.0
POE (4) alkyl (C12-14) sulfosuccinate disodium 2.0
Cationized cellulose (PQ-10) 0.2
Product of the present invention (sample number 1, converted into effective amount) 1.0
Propylene glycol 0.3
Sodium chloride 0.5
Sodium benzoate 0.3
Edetic acid disodium 0.05
Fragrance 0.3
Purified water remaining

Example 7
<Two-component oxidative hair dye>
(First agent)
Product of the present invention (sample No. 4, converted into effective amount) 0.3
Polyquaternium-6 0.3
Stearyltrimethylammonium chloride 1.0
POE (20) oleyl ether 5.0
POE (20) hexyl decyl ether 10.0
Lauric acid amidopropyl betaine solution 5.0
Cetanol 5.0
Propylene glycol 15.0
Polyethylene glycol 5.0
Sodium thioglycolate 0.5
Aminopropyl dimethicone 0.4
Toluene 2,5-diamine 3.0
Resorcin 0.8
2,4-Diaminophenoxyethanol hydrochloride 0.2
Paraphenylenediamine 0.2
Metaaminophenol 0.2
28% ammonia water 5.0
Sodium sulfite 0.5
Perfume appropriate amount Preservative appropriate amount Purified water remaining (second agent)
Hydrogen peroxide solution (35%) 17.0
Cetanol 1.0
Sodium lauryl sulfate 0.3
Phenacetin 0.1
Edetate disodium 0.2
Purified water remaining

Claims (1)

A cationic monomer (A) represented by the following general formula (1),

(Wherein, R ₁ and R ₂ each independently represents a hydrogen atom or a methyl group, R ₃ and R ₄ each independently represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms .X ^- is (Represents anions of organic or inorganic acids.)
Nonionic monomer (B) represented by the following general formula (2),

(In the formula, R ₅ represents a hydrogen atom or a methyl group, and R ₆ and R ₇ each independently represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms.)
And a water-soluble amphoteric copolymer obtained by copolymerizing an anionic monomer (C), the copolymer having a weight average molecular weight of 2,000 to 5,000, and a weight average molecular weight ( A composition for treating hair comprising a water-soluble amphoteric copolymer having a ratio (Mw / Mn) of Mw) to the number average molecular weight (Mn) of 15 or less.