PROBLEM TO BE SOLVED: To provide a hair shampoo giving excellent feeling in shampooing and having excellent effect to restore the hair tip curled or waved by the accumulation of damage caused by hair color, etc., to the original straight state.SOLUTION: The hair shampoo contains (A) a sulfate-type surfactant expressed by general formula (1): R1-O-(C2H4O)n-SO3M (R1 is a 10-18C alkyl or alkenyl n is 0 or a positive integer and M is sodium or ammonium) wherein the compound of n=0 accounts for 30-45 wt.%, n=1 accounts for 18-27 wt.%, n=2 accounts for 10-20 wt.% and n&ge3 accounts for the remaining part and the sum of n=0 to 2 accounts for &ge70 wt.% based on the total sulfate, (2) a 6-18C hydrophobic sulfonic acid or its salt, (3) a hydroxycarboxylic acid, dicarboxylic acid or aromatic carboxylic acid and (D) an organic solvent and has a pH value of &ge2 and <6.COPYRIGHT: (C)2007,JPO&INPIT【課題】洗髪時の感触に優れ、ヘアカラーなどの傷みが蓄積して跳ねたりうねったりした毛先を本来の真っ直ぐな状態に回復させる効果に優れる毛髪洗浄剤の提供。【解決手段】成分(A)~(D)を含有しpH2以上6未満である毛髪洗浄剤。(A) 一般式(1)R1-O-(C2H4O)n-SO3M (1)〔R1はC10-18のアルキル又はアルケニル、nは0又は正の整数、Mはナトリウム又はアンモニウムを示す。〕で表され、n=0が30~45重量%、n=1が18~27重量%、n=2が10~20重量%、及びn=3以上が残余であり、かつn=0~2の合計が全硫酸塩の70重量%以上である硫酸塩型界面活性剤(B) C6-18疎水性スルホン酸又はその塩(C) ヒドロキシカルボン酸、ジカルボン酸又は芳香族カルボン酸(D) 有機溶剤【選択図】なし
