Patent ID: 8921302

Claim:
An aqueous hair cleansing composition, comprising: components (A), (B), (C), and (D), and water, wherein the aqueous hair cleansing composition has a pH of from 2 to 5 at 25° C. when diluted 20-fold by mass with water: (A) an anionic surfactant; (B) a cationized hydroxypropyl cellulose having a main chain derived from an anhydroglucose represented by formula (1), and having a degree of substitution with cationized ethyleneoxy groups of from 0.01 to 2.9 and a degree of substitution with propyleneoxy groups of from 0.1 to 4.0: wherein, in formula (1), R 1 , R 2 , and R 3 each independently represent a substituent represented by formula (2), and n represents an average degree of polymerization of the anhydroglucose and is from 50 to 5,000; wherein, in formula (2), one of Y 1 and Y 2 represents a hydrogen atom and the other represents a cationic group represented by formula (3), PO represents a propyleneoxy group, p represents a number of cationized ethyleneoxy groups (—CH(Y 1 )—CH(Y 2 )—O—), q represents a number of propyleneoxy groups (—PO—), and p and q each represent 0 or a positive integer, provided that a case where all p's and q's in R 1 , R 2 , and R 3 simultaneously represent 0 is excluded, and when both p and q do not represent 0, the cationized ethyleneoxy group and the propyleneoxy group may be added in any order, and when both p and q do not represent 0, and p and/or q each represent/represents 2 or more, any one of a block bond and a random bond is permitted; wherein, in formula (3), R 4 , R 5 , and R 6 each independently represent a linear or branched alkyl group having from 1 to 3 carbon atoms, and X − represents an anionic group; (C) at least one organic solvent selected from the group consisting of: (C1) an aromatic alcohol represented by formula (4): wherein, in formula (4), R 7 represents a hydrogen atom, a methyl group, or a methoxy group, Y 3 represents a single bond, or a linear or branched alkylene group or alkenylene group having from 1 to 3 carbon atoms, Z 1 represents a hydrogen atom or a hydroxyl group, and r and s each represent a number of 0 to 5; and (C2) a polypropylene glycol having a molecular weight of from 200 to 1,000; and (D) at least one organic carboxylic acid selected from the group consisting of a hydroxy monocarboxylic acid and a dicarboxylic acid.