Patent ID: 6582687
Filing Date: 2003-06-24
Classification: A61K,A61Q

Abstract:
A method of suppressing hardening of an acidic skin cleanser consisting essentially of:an alkali salt of N-acylamino acid; an ampholytic surfactant; water; and an organic acid, said acidic skin cleanser having a pH of between 5-6.5, wherein said method comprises adding to said acidic skin cleanser said ampholytic surfactant, said ampholytic surfactant being selected from the group consisting of N-alkyl-N-carboxymethyl ammonium betaine, alkyldimethyl aminoacetic acid betaine, alkylimidazolinium betaine, cocoyl amido propyldimethyl glycine, coconut oil alkyl betaine, lauryl dimethyl amino-2-hydroxylpropyl sulfo betaine, lauric acid amide propyl betaine, and lauryl dimetyl amino propylsulfo betaine.