JP4473407B2 - Treatment for dyeing hair - Google Patents

Treatment for dyeing hair Download PDF

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Publication number
JP4473407B2
JP4473407B2 JP2000113306A JP2000113306A JP4473407B2 JP 4473407 B2 JP4473407 B2 JP 4473407B2 JP 2000113306 A JP2000113306 A JP 2000113306A JP 2000113306 A JP2000113306 A JP 2000113306A JP 4473407 B2 JP4473407 B2 JP 4473407B2
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Japan
Prior art keywords
hair
acid
dye
dyed
treatment agent
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JP2000113306A
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JP2001294520A (en
Inventor
真主 山口
誠 飯島
創 宮部
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Kao Corp
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Kao Corp
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Description

【0001】
【発明の属する技術分野】
本発明は、染色した毛髪の色落ちを効果的に防いで色を長持ちさせる毛髪処理組成物及び毛髪処理方法に関する。
【0002】
【従来の技術及び発明が解決しようとする課題】
酸性染料系染毛料による毛髪の染色は、染毛料をそのイオン性により毛髪に直接吸着させるものであり、色の種類が豊富なことや毛髪や頭皮に対する影響が少なくアレルギー体質の人や妊婦でも心配なく手軽に使用できることから、酸化染毛剤に代わり広く使用されるようになった。しかし、酸性染料系の染毛料は、一般にシャンプー等による洗髪堅牢度が劣るという問題があり、斯かる染色の堅牢性向上に対し、これまでにベンジルアルコール等の毛髪浸透性のある有機溶剤を染毛剤に配合したり、特定の有機溶剤と有機酸等を配合した組成物により前処理を行う方法(特開平10−182373号公報)及び2−ヒドロキシベンジルアルコールやフェニルエチレングリコールからなる色落ち防止剤(特開平9−20625号公報)等が報告されている。
【0003】
しかし、これらの手段でも、染色後のシャンプー、トリートメント剤、整髪料等の使用の繰り返しによる色落ちを充分に防止することはできず、また2−ヒドロキシベンジルアルコールやフェニルエチレングリコールにおいては、融点が高く安定に配合することが困難であったり、刺激性や感作性等を起こすことがあり使用が限定される等の問題があった。
【0004】
本発明は、染毛における染料の染着性及び洗髪堅牢度を効果的に改善でき且つ安全性の高い毛髪用処理剤及び毛髪処理方法を提供することを目的とする。
【0005】
【課題を解決するための手段】
本発明者らは、染色された毛髪に吸着している染料の脱離及びそれに伴なう毛髪の退色について検討した結果、ヒドロキシアルカンスルホン酸又はその塩を含有し、特定のpHに調整した組成物が、染色された毛髪の色落ちを効果的に防いで色を長持ちさせ得ることを見出した。
【0006】
すなわち、本発明は、炭素数2〜5のヒドロキシアルカンスルホン酸又はその塩を含み、pHが1〜6である染色毛髪用処理剤を提供するものである。
【0007】
また、本発明は、酸性染料系染毛料で染色した毛髪に当該染色毛髪用処理剤を塗布し、20〜60℃で30秒〜30分放置した後、該毛髪を洗う毛髪処理方法を提供するものである。
【0008】
【発明の実施の形態】
本発明に用いる炭素数2〜5のヒドロキシアルカンスルホン酸としては、2−ヒドロキシエタンスルホン酸、3−ヒドロキシプロパンスルホン酸、2−ヒドロキシプロパンスルホン酸等が挙げられるが、2−ヒドロキシエタンスルホン酸が特に好ましい。また、その塩としてはアンモニウム塩、ナトリウム塩、カリウム塩などの生理的に許容できる塩が挙げられる。これらは色落ち防止効果及び洗髪堅牢性の点から、染色毛髪用処理剤中に0.1〜50重量%(以下、単に%と示す)、特に1〜10%含有させることが好ましい。
【0009】
本発明の染色毛髪用処理剤のpHは、6より高いと色落ち防止効果が得られず、pH1〜6の範囲である必要があるが、好ましくは2〜5であり、さらに好ましくは2〜4である。
pHの調整は、各種有機酸、或いは通常用いられるpH調整剤、例えば燐酸又はそれらのナトリウム塩、アンモニア水、水酸化ナトリウム、水酸化カリウム、有機アミンなどのアルカリ類を用いて行うことができる。
【0010】
また、本発明の染色毛髪用処理剤には、前記ヒドロキシアルカンスルホン酸又はその塩以外に、(A)ベンジルアルコール、ベンジルオキシエタノール、低級アルキレンカーボネート、N−アルキルピロリドン又はホルムアミド誘導体;(B)有機酸又はその塩;(C)低級アルコール又は多価アルコール若しくはその重合体等を含有させることができるが、次の成分(A)、(B)、(C)及び(D)、
(A)芳香族アルコール、低級アルキレンカーボネート、N−アルキルピロリドン又はホルムアミド類、
(B)有機酸又はその塩、
(C)低級アルコール又は多価アルコール若しくはその低級アルキルエーテル、(D)炭素数2〜5のヒドロキシアルカンスルホン酸又はその塩
を含有し、pHが1〜6であり、染料を含有しない染色毛髪用処理剤とするのが特に好ましい。
【0011】
成分(A)の芳香族アルコールとしては、例えばベンジルアルコール、フェネチルアルコール、γ−フェニルプロピルアルコール、桂皮アルコール、アニスアルコール、p−メチルベンジンアルコール、α−α−ジメチルフェネチルアルコール、α−フェニルエタノール、フェノキシエタノール等が挙げられ、低級アルキレンカーボネートとしては、例えばエチレンカーボネート、プロピレンカーボネート、ブチレンカーボネート等の炭素数2〜6のアルキレン基を有するカーボネートが挙げられ、N−アルキルピロリドンとしては、例えばN−メチルピロリドン、N−エチルピロリドン等が挙げられ、ホルムアミド類としては、例えばN−シクロヘキシルホルムアミド、N,N−ジメチルホルムアミド、N−メチルホルムアミド等が挙げられる。
成分(A)としては、毛髪浸透性及び染料染着性の点からベンジルアルコール、ベンジルオキシエタノール、プロピレンカーボネート等が好ましい。
斯かる(A)成分は、二種以上混合して用いてもよく、染色用毛髪処理剤中に毛髪浸透性及び染料染着性の点から1〜50%、特に5〜45%含有させることが好ましい。
【0012】
成分(B)の有機酸又はその塩としては、グリコール酸、乳酸、クエン酸、酒石酸、リンゴ酸等のヒドロキシ酸、レブリン酸等のオキシ酸、酢酸、マレイン酸、フマル酸等のカルボン酸及びこれらのナトリウム塩等の本発明の処理剤中に溶解する塩が挙げられる。特にグリコール酸、クエン酸、リンゴ酸、フマル酸、乳酸又はこれらの塩が好ましい。斯かる有機酸又はその塩は二種以上混合して用いてもよい。
有機酸又はその塩は、染色用毛髪処理剤中に染着速度向上の点から有機酸として1〜30%、特に3〜10%含有させることが好ましい。
【0013】
成分(C)の低級アルコールとしては、炭素数2〜6の直鎖又は分岐鎖のアルコールが挙げられ、例えばエタノール、イソプロパノール、n−プロパノール、N−ブタノール等が好ましい。
【0014】
成分(C)の多価アルコールとしては、1,3−ブチレングリコール、エチレングリコール、ジエチレングリコール、ヘキシレングリコール、ジプロピレングリコール、トリエチレングリコール、ポリエチレングリコール(分子量200〜5000)等のアルキレングリコール類;ジグリセリン、ポリグリセリン等のグリセリン類等が挙げられ、多価アルコールの低級アルキルエーテル(カルビトール類)としては、エチレングリコールモノエチルエーテル、エチレングリコールモノイソプロピルエーテル、ジエチレングリコールモノエチルエーテル、ジエチレングリコールモノブチルエーテル、トリエチレングリコールモノエチルエーテルグリセリン等のアルキレングリコールのモノエーテル類等が挙げられる。このうち特に1,3−ブチレングリコール、ジエチレングリコール、ヘキシレングリコール、ジプロピレングリコール、トリエチレングリコール、ポリエチレングリコール(分子量200〜1000)が好ましい。
これらの低級アルコールや多価アルコール類等は、二種以上混合して用いてもよく、染色用毛髪処理剤中に組成物安定性の点から合計で5〜50%、特に10〜30%含有させることが好ましい。
【0015】
本発明の染色毛髪用処理剤には目的に応じ、他の成分を含有させることができる。例えば、界面活性剤、シリコーン、高級アルコール、エステル油、動植物油、アミノ酸、ポリペプチド、粘度調節剤、感触向上剤、保湿剤、育毛・養毛剤、防腐剤、酸化防止剤、香料、着色料等である。ここで、粘度調節剤としては、水溶性高分子を使用することが好ましく、例えば、キサンタンガム、グアーガム等の天然ガム類若しくはその変性品、ヒドロキシエチルセルロース、メチルセルロース、カルボキシメチルセルロース等のセルロース誘導体、アルギン酸ソーダ、アルギン酸プロピレングリコール等のアルギン酸誘導体、ポリビニルアルコール、ポリビニルピロリドン、ポリエチレングリコール等の合成高分子等を挙げることができ、中でも、天然ガム類若しくはその変性品、又はセルロース誘導体を用いることがより好ましく、それらは全組成中0.1〜5.0%含有させることが好ましい。また、毛髪や羊毛、絹、ナイロン等への酸性染料系染毛料の色落ち防止効果が公知であるタンニン酸等の毛髪用又は繊維用後処理剤を併用することもできる。
【0016】
本発明の染色毛髪用処理剤は、例えば液状、ジェル状、クリーム状、乳液状、スプレー、フォーム等種々の剤型とすることができる。
【0017】
本発明の染色毛髪用処理剤は、例えば酸性染料系染毛料で染色した毛髪に当該染色毛髪用処理剤を塗布し、20〜60℃で30秒〜30分放置した後、該毛髪を洗うことにより使用するのが好ましい。
ここで、酸性染料系染毛料とは、ヒドロキシル基、カルボキシル基、スルホン酸基等の酸性基をもち、水溶液中でイオン化して色素部分がアニオンになるいわゆる酸性染料を含有する染毛料をいい、酸性染料としては例えば青色1号、紫色401号、黒色401号、だいだい色205号、赤色201号、赤色227号、赤色106号、黄色4号、黄色403号の(1)等が挙げられる。
染色毛髪用処理剤の塗布に際しては、毛髪は濡れていても乾燥していてもよく、また染色の直後、或いは期間をおいて塗布しても構わず、該処理を繰り返し行うことにより、充分な色落ち防止効果が得られる。
より好ましい使用態様としては、例えば通常の方法で酸性染毛料等で毛髪を染色し、余分の染毛料を洗浄した後、本発明染色毛髪用処理剤を塗布し、20〜60℃、好ましくは20〜45℃で30秒〜30分放置した後、該毛髪を水洗又はシャンプーする方法が挙げられる。
【0018】
【実施例】
表1に示す染色毛髪用処理剤を調製し、以下に示す試験方法により毛髪の色落ち試験、洗浄堅牢性試験及びその評価を行った。
【0019】
【表1】

Figure 0004473407
【0020】
色落ち試験方法:人毛白髪1.0gの毛束に対して酸性染料を含有する表2に示す組成の染毛料1.0gで染色し、シャンプー洗浄後タオルで余分の水分を除き、全量を1.3gとした。実施例1〜3の染色用毛髪用処理剤1.0gまたは比較例として水1.0gをそれぞれ塗布し、室温(20℃)または45℃で5分放置した。それぞれの毛束をシャンプーで洗浄後、タオルで余分の水分を除き、1.3gとした。ポリオキシエチレンラウリルエーテル硫酸ナトリウムの2%水溶液を1.0g塗布し、5分間室温で放置後毛束を絞り、酸性染料の色落ちにより着色した水溶液を回収した。回収した水溶液のうち0.2mLを3センチメートル四方の濾紙に均一に塗布し、濾紙を乾燥後、ミノルタ製測色機(CR−200)でL、a、b値を測色した。着色の度合いは未処理の濾紙のL、a、b値との色空間における距離ΔE値で求めた。結果を表3に示す。
【0021】
洗浄堅牢性試験方法:人毛白髪1.0gの毛束に対して酸性染料を含有する表2に示す組成の染毛料1.0gで染色し、シャンプー洗浄後タオルで余分の水分を除き、全量を1.3gとした。実施例1〜3の染毛用毛髪処理剤1.0gまたは比較例として水1.0gをそれぞれ塗布し、室温または45℃で10分間放置した。それぞれの毛束をシャンプーで5回、10回、15回洗浄し、毛束の色落ちの程度を5段階で目視判定した。結果を表4に示す。
【0022】
Figure 0004473407
【0023】
【表2】
Figure 0004473407
【0024】
【表3】
Figure 0004473407
【0025】
【表4】
Figure 0004473407
【0026】
表3及び4から明らかなように、炭素数2〜5のヒドロキシアルカンスルホン酸又はその塩を含むpH1〜6の組成物で染色後の毛髪を処理すると、染料の脱離を防止し、かつ色を長持ちさせることができることがわかる。
【0027】
【発明の効果】
本発明の染色毛髪用処理剤は、酸性染料系染毛料で染色した毛髪に吸着している染料の脱離を効果的に防いで色を長持ちさせる。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hair treatment composition and a hair treatment method that effectively prevent color fading of dyed hair and make the color last longer.
[0002]
[Prior art and problems to be solved by the invention]
Hair dyeing with acidic dye-based hair dyes directly adsorbs hair dyes to the hair due to its ionic nature, and there are many types of colors and there is little effect on the hair and scalp, so there are concerns for people with allergies and pregnant women Since it can be used easily and easily, it has come to be widely used instead of oxidative hair dyes. However, acid dye-based hair dyes generally have a problem that the fastness to washing with shampoo is poor, and in order to improve the fastness of such dyeing, hair dyes such as benzyl alcohol have been dyed so far. A method of pre-treatment with a composition containing a specific organic solvent and an organic acid or the like (JP-A-10-182373) and prevention of discoloration comprising 2-hydroxybenzyl alcohol or phenylethylene glycol An agent (Japanese Patent Laid-Open No. 9-20625) has been reported.
[0003]
However, even these methods cannot sufficiently prevent discoloration due to repeated use of dyed shampoos, treatment agents, hairdressing agents, etc., and 2-hydroxybenzyl alcohol and phenylethylene glycol have a melting point. There is a problem that it is difficult to mix stably and highly, and it may cause irritation and sensitization, so that its use is limited.
[0004]
An object of the present invention is to provide a hair treatment agent and a hair treatment method that can effectively improve the dyeing property and fastness to washing of hair in hair dyeing and have high safety.
[0005]
[Means for Solving the Problems]
As a result of examining the desorption of the dye adsorbed on the dyed hair and the fading of the hair associated therewith, the present inventors have found that the composition contains hydroxyalkanesulfonic acid or a salt thereof and is adjusted to a specific pH. It has been found that the product can effectively prevent color fading of the dyed hair and prolong the color.
[0006]
That is, this invention provides the processing agent for dyeing hair containing C2-C5 hydroxyalkanesulfonic acid or its salt, and pH is 1-6.
[0007]
The present invention also provides a hair treatment method in which the dyed hair treatment agent is applied to hair dyed with an acid dye-based hair dye, left at 20 to 60 ° C. for 30 seconds to 30 minutes, and then washed. Is.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Examples of the hydroxyalkanesulfonic acid having 2 to 5 carbon atoms used in the present invention include 2-hydroxyethanesulfonic acid, 3-hydroxypropanesulfonic acid, 2-hydroxypropanesulfonic acid, and the like. Particularly preferred. The salts include physiologically acceptable salts such as ammonium salts, sodium salts and potassium salts. From the viewpoint of color fading prevention effect and fastness to washing, it is preferable to contain 0.1 to 50% by weight (hereinafter simply referred to as%), particularly 1 to 10% in the dyed hair treatment agent.
[0009]
When the pH of the treatment agent for dyed hair of the present invention is higher than 6, the effect of preventing discoloration cannot be obtained, and the pH needs to be in the range of 1 to 6, preferably 2 to 5, and more preferably 2 to 2. 4.
The pH can be adjusted using various organic acids or a commonly used pH adjuster such as phosphoric acid or a sodium salt thereof, aqueous ammonia, sodium hydroxide, potassium hydroxide, an organic amine or the like.
[0010]
In addition to the hydroxyalkanesulfonic acid or a salt thereof, the treatment agent for dyeing hair of the present invention includes (A) benzyl alcohol, benzyloxyethanol, lower alkylene carbonate, N-alkylpyrrolidone or formamide derivative; (B) organic An acid or a salt thereof; (C) a lower alcohol or a polyhydric alcohol or a polymer thereof can be contained, but the following components (A), (B), (C) and (D),
(A) aromatic alcohol, lower alkylene carbonate, N-alkylpyrrolidone or formamide,
(B) an organic acid or a salt thereof,
(C) A lower alcohol or a polyhydric alcohol or a lower alkyl ether thereof, (D) a hydroxyalkanesulfonic acid having 2 to 5 carbon atoms or a salt thereof, having a pH of 1 to 6, and containing no dye A treatment agent is particularly preferred.
[0011]
Examples of the aromatic alcohol of component (A) include benzyl alcohol, phenethyl alcohol, γ-phenylpropyl alcohol, cinnamon alcohol, anise alcohol, p-methylbenzine alcohol, α-α-dimethylphenethyl alcohol, α-phenylethanol, phenoxyethanol. Examples of the lower alkylene carbonate include carbonates having an alkylene group having 2 to 6 carbon atoms such as ethylene carbonate, propylene carbonate, and butylene carbonate. Examples of the N-alkylpyrrolidone include N-methylpyrrolidone, N-ethylpyrrolidone and the like can be mentioned. Examples of formamides include N-cyclohexylformamide, N, N-dimethylformamide, N-methylformamide and the like. .
As the component (A), benzyl alcohol, benzyloxyethanol, propylene carbonate, and the like are preferable from the viewpoints of hair permeability and dyeability.
Such component (A) may be used as a mixture of two or more thereof, and is contained in the hair treatment agent for dyeing in an amount of 1 to 50%, particularly 5 to 45% from the viewpoint of hair penetration and dyeing property. Is preferred.
[0012]
Component (B) organic acids or salts thereof include glycolic acid, lactic acid, citric acid, tartaric acid, hydroxy acids such as malic acid, oxyacids such as levulinic acid, carboxylic acids such as acetic acid, maleic acid, fumaric acid, and the like And a salt that dissolves in the treatment agent of the present invention, such as sodium salt. In particular, glycolic acid, citric acid, malic acid, fumaric acid, lactic acid or salts thereof are preferred. Two or more kinds of such organic acids or salts thereof may be mixed and used.
The organic acid or a salt thereof is preferably contained in the hair treatment agent for dyeing in an amount of 1 to 30%, particularly 3 to 10% as an organic acid from the viewpoint of improving the dyeing speed.
[0013]
As a lower alcohol of a component (C), a C2-C6 linear or branched alcohol is mentioned, For example, ethanol, isopropanol, n-propanol, N-butanol etc. are preferable.
[0014]
Examples of the component (C) polyhydric alcohol include alkylene glycols such as 1,3-butylene glycol, ethylene glycol, diethylene glycol, hexylene glycol, dipropylene glycol, triethylene glycol, and polyethylene glycol (molecular weight 200 to 5000); Examples thereof include glycerins such as glycerin and polyglycerin, and examples of lower alkyl ethers (carbitols) of polyhydric alcohol include ethylene glycol monoethyl ether, ethylene glycol monoisopropyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, And alkylene glycol monoethers such as ethylene glycol monoethyl ether glycerin. Among these, 1,3-butylene glycol, diethylene glycol, hexylene glycol, dipropylene glycol, triethylene glycol, and polyethylene glycol (molecular weight 200 to 1000) are particularly preferable.
These lower alcohols and polyhydric alcohols may be used as a mixture of two or more, and are contained in the hair treatment agent for dyeing in a total amount of 5 to 50%, particularly 10 to 30% from the viewpoint of composition stability. It is preferable to make it.
[0015]
The treatment agent for dyed hair of the present invention can contain other components according to the purpose. For example, surfactants, silicones, higher alcohols, ester oils, animal and vegetable oils, amino acids, polypeptides, viscosity modifiers, feel improvers, moisturizers, hair growth / hair nourishing agents, antiseptics, antioxidants, fragrances, coloring agents, etc. is there. Here, as the viscosity modifier, it is preferable to use a water-soluble polymer, for example, natural gums such as xanthan gum and guar gum or modified products thereof, cellulose derivatives such as hydroxyethylcellulose, methylcellulose, carboxymethylcellulose, sodium alginate, Examples include alginic acid derivatives such as propylene glycol alginate, synthetic polymers such as polyvinyl alcohol, polyvinyl pyrrolidone, and polyethylene glycol. Among them, it is more preferable to use natural gums or modified products thereof, or cellulose derivatives. It is preferable to contain 0.1 to 5.0% in the whole composition. In addition, a post-treatment agent for hair or fiber such as tannic acid, which is known for its effect of preventing discoloration of acidic dye-based hair dyes on hair, wool, silk, nylon and the like, can also be used in combination.
[0016]
The treatment agent for dyed hair of the present invention can be made into various dosage forms such as liquid, gel, cream, emulsion, spray, foam and the like.
[0017]
The dyeing hair treatment agent of the present invention is obtained by, for example, applying the dyeing hair treatment agent to hair dyed with an acid dye-based hair dye, leaving it at 20 to 60 ° C. for 30 seconds to 30 minutes, and then washing the hair. Is preferably used.
Here, the acidic dye-based hair dye refers to a hair dye containing a so-called acidic dye having an acidic group such as a hydroxyl group, a carboxyl group, a sulfonic acid group, etc., which is ionized in an aqueous solution to become an anion of the pigment part. Examples of the acidic dye include Blue No. 1, Purple No. 401, Black No. 401, Orange No. 205, Red No. 201, Red No. 227, Red No. 106, Yellow No. 4, Yellow No. 403 (1) and the like.
When applying the treatment for dyeing hair, the hair may be wet or dry, and may be applied immediately after dyeing or after a period of time. An effect to prevent discoloration is obtained.
As a more preferable usage mode, for example, hair is dyed with an acidic hair dye or the like by a usual method, and after the excess hair dye is washed, the treatment agent for dyeing hair of the present invention is applied and 20 to 60 ° C., preferably 20 A method of washing or shampooing the hair after standing at ˜45 ° C. for 30 seconds to 30 minutes can be mentioned.
[0018]
【Example】
A treatment for dyed hair shown in Table 1 was prepared, and a color fading test, a washing fastness test and evaluation thereof were performed by the following test methods.
[0019]
[Table 1]
Figure 0004473407
[0020]
Color fading test method: A hair bundle of 1.0 g of human white hair is dyed with 1.0 g of a hair dye having the composition shown in Table 2 containing an acid dye, and after washing with shampoo, excess water is removed with a towel, 1.3 g. 1.0 g of the hair treatment agent for dyeing in Examples 1 to 3 or 1.0 g of water as a comparative example was applied and left at room temperature (20 ° C.) or 45 ° C. for 5 minutes. After washing each hair bundle with shampoo, excess water was removed with a towel to obtain 1.3 g. 1.0 g of a 2% aqueous solution of sodium polyoxyethylene lauryl ether sulfate was applied, allowed to stand at room temperature for 5 minutes, and then the hair bundle was squeezed to collect an aqueous solution colored by discoloration of the acid dye. 0.2 mL of the collected aqueous solution was uniformly applied to a filter paper of 3 centimeters square, the filter paper was dried, and then L, a, and b values were measured with a Minolta colorimeter (CR-200). The degree of coloring was determined by the distance ΔE value in the color space with the L, a, and b values of the untreated filter paper. The results are shown in Table 3.
[0021]
Washing fastness test method: A hair bundle of 1.0 g of human white hair is dyed with 1.0 g of a hair dye having the composition shown in Table 2 containing an acid dye, and after washing with shampoo, excess moisture is removed with a towel. Was 1.3 g. 1.0 g of the hair treatment agent for hair dyeing of Examples 1 to 3 or 1.0 g of water as a comparative example was applied and left at room temperature or 45 ° C. for 10 minutes. Each hair bundle was washed 5 times, 10 times, and 15 times with a shampoo, and the degree of color fading of the hair bundle was visually judged in 5 stages. The results are shown in Table 4.
[0022]
Figure 0004473407
[0023]
[Table 2]
Figure 0004473407
[0024]
[Table 3]
Figure 0004473407
[0025]
[Table 4]
Figure 0004473407
[0026]
As apparent from Tables 3 and 4, when dyed hair is treated with a composition having a pH of 1 to 6 containing a hydroxyalkanesulfonic acid having 2 to 5 carbon atoms or a salt thereof, the dye is prevented from being detached and the color is increased. It can be seen that can last longer.
[0027]
【The invention's effect】
The treatment agent for dyed hair of the present invention effectively prevents the detachment of the dye adsorbed on the hair dyed with the acid dye-based hair dye and makes the color last longer.

Claims (3)

炭素数2〜5のヒドロキシアルカンスルホン酸又はその塩を含み、pHが1〜6である、酸性染料系染毛料で染色した毛髪のための処理剤。 A treatment agent for hair dyed with an acid dye-based hair dye, comprising a hydroxyalkanesulfonic acid having 2 to 5 carbon atoms or a salt thereof, and having a pH of 1 to 6. 次の成分(A)、(B)、(C)及び(D)、
(A)芳香族アルコール、低級アルキレンカーボネート、N−アルキルピロリドン又はホルムアミド類、
(B)有機酸又はその塩、
(C)低級アルコール又は多価アルコール若しくはその低級アルキルエーテル、
(D)炭素数2〜5のヒドロキシアルカンスルホン酸又はその塩
を含有し、pHが1〜6であり、染料を含有しない、酸性染料系染毛料で染色した毛髪のための処理剤。
The following components (A), (B), (C) and (D),
(A) aromatic alcohol, lower alkylene carbonate, N-alkylpyrrolidone or formamide,
(B) an organic acid or a salt thereof,
(C) a lower alcohol or a polyhydric alcohol or a lower alkyl ether thereof,
(D) A treatment agent for hair dyed with an acidic dye-based hair dye, which contains a hydroxyalkanesulfonic acid having 2 to 5 carbon atoms or a salt thereof, has a pH of 1 to 6, and does not contain a dye.
酸性染料系染毛料で染色した毛髪に請求項1又は2記載の染色毛髪用処理剤を塗布し、20〜60℃で30秒〜30分放置した後、該毛髪を洗う毛髪処理方法。  A hair treatment method in which the dyed hair treatment agent according to claim 1 or 2 is applied to hair dyed with an acid dye-based hair dye, left at 20 to 60 ° C for 30 seconds to 30 minutes, and then washed.
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