Weakly - acidic skin cleaning agents containing alkali metal salt of n - acyl amino acid

摘要

A weak acid skin cleanser which characteristically contains alkali salt of N-acylamino acid and maltitolhydroxy aliphatic ether, or a hydroxy ether carboxylic acid-based anionic surfactant, or polyethylene powder, as well as water and organic acid. Also, weak acid skin cleanser which characteristically contains alkali salt of N-acylamino acid, a betaine-based ampholytic surfactant, water, and organic acid. To provide a weak acid cleanser which has a superior effect in terms of all the following items: the skin cleaning effect, creamy and rich foaming, rapid rinsing, refreshing sensation during use, moist skin sensation after cleaning, and shelf stability of the base agent (separation, offensive odor, discoloration, etc.). Also to provide a weak acid cleanser which is free of increasing hardness over time at room temperature and lower temperatures, (when used as paste to fill a tube) solves the fatal problem of becoming difficult to squeeze out of a tube after allowing to stand at room temperature and lower temperatures, and gives rapid lathering, creamy and rich foaming, rapid rinsing, a refreshing sensation during skin cleaning, and a moist sensation after cleaning.