| abstract |
PROBLEM TO BE SOLVED: To sufficiently improve foam quality, foamability and foam sustainability in a hypoallergenic shampoo composition using a polyoxyethylene alkyl ether sulfate ester salt and an amino acid surfactant in combination. . SOLUTION: As an amino acid surfactant used in combination with a polyoxyethylene alkyl ether sulfate, one or more N-acylalanine salt surfactants having alanine as an amino acid residue are used. Furthermore, when one or more dialkyldiallylammonium chloride / acrylamide copolymers are used in combination, a synergistic improvement in foam quality, foamability and foam sustainability can be seen. |