Hair cleansing composition
A hair cleansing composition containing the following Components (A) to (D): (A) a sulfate surfactant represented by the following formula (1): R 1 —O—(C 2 H 4 O) n —SO 3 M (1) (wherein, R 1 represents a C 10-18 alkyl or alkenyl, n stands for 0 or a positive integer and M represents sodium or ammonium), composed of from 30 to 45 wt. % of a sulfate exhibiting n=0, from 18 to 27 wt. % of a sulfate exhibiting n=1, from 10 to 20 wt. % of a sulfate exhibiting n=2 and the balance of sulfates exhibiting n=3 or greater, and containing the sulfates exhibiting n=0 to 2 in a total amount of 70 wt. % or greater based on the total sulfates, (B) a C 6-18 hydrophobic sulfonic acid or salt thereof, (C) a hydroxycarboxylic acid, dicarboxylic acid or aromatic carboxylic acid, (D) an organic solvent; and having a pH of 2 or greater but less than 6. The hair cleansing composition according to the present invention is excellent in the hair feel during shampooing and effects for straightening the flyaway or waved hair tip, which has resulted from the accumulation of damages caused, for example, by hair coloring.
1. A hair cleansing composition comprising the following components (A) to (D):
(A) from 10 to 20 wt % of a sulfate surfactant represented by the following formula (1):
R 1 —O—(C 2 H 4 O) n —SO 3 M (1)
wherein, R 1 represents a linear or branched alkyl or alkenyl group having from 10 to 18 carbon atoms, n stands for 0 or a positive integer and M represents sodium or ammonium, wherein the sulfate surfactant is composed of from 30 to 45 wt. % of a sulfate exhibiting n=0, from 18 to 27 wt. % of a sulfate exhibiting n=1, from 10 to 20 wt. % of a sulfate exhibiting n=2 and the balance of sulfates exhibiting n=3 or greater, and contains the sulfates exhibiting n=0 to 2 in a total amount of 70 wt. % or greater based on the total sulfates,
(B) from 0.2 to 1 wt % of p-toluenesulfonic acid, naphthalenesulfonic acid, or a salt thereof of either acid,
(C) from 0.3 to 2 wt % of an organic acid selected from the group consisting of malic acid, glycolic acid and lactic acid,
(D) from 0.5 to 10 wt % of an organic solvent comprising polypropylene glycol having a molecular weight of from 200 to 5000; and optionally, at least one selected from the group consisting of ethanol and benzyl alcohol;
wherein the composition has a pH at 25° C. of from 3 to 5 when diluted to 20 times the weight with water.
2. The hair cleansing composition according to claim 1 , further comprising an amphoteric surfactant.
3. The hair cleansing composition according to claim 1 , further comprising an ethylene glycol monofatty acid ester or ethylene glycol difatty acid ester.
4. The hair cleansing composition according to claim 1 , wherein the pH at 25° C. is 3.5 to 4.5 when diluted to 20 times the weight with water.
5. A method comprising applying the hair cleansing composition according to claim 1 to the hair of a subject in need thereof of, wherein the hair tip of the hair which has been flyaway or waved owing to damages accumulated by repetition of hair coloring is in need of straightening.
6. The hair cleansing composition according to claim 1 , wherein R 1 of component (A) is a dodecyl group or a tetradecyl group.
7. The hair cleansing composition according to claim 1 wherein the organic solvent additionally comprises benzyl alcohol.
8. The hair cleansing composition according to claim 1 wherein the organic solvent additionally comprises ethanol and benzyl alcohol.