MOISTURIZING POLYMER, METHOD FOR PRODUCING MOISTURIZING POLYMER, MOISTURIZING AGENT COMPOSITION, AND METHOD FOR PRODUCING MOISTURIZING AGENT COMPOSITION

摘要

Provided are: a moisturizing polymer which can be easily produced, while having high moisturizing performance in comparison to conventional moisturizing agents and excellent feeling on the skin; and a method for producing the moisturizing polymer. This moisturizing polymer has a structure wherein an amino acid monomer containing a neutral amino acid and a hydrophilic amino acid is graft polymerized to a polyfunctional polymer. This method for producing a moisturizing polymer comprises a step wherein an amino acid monomer containing a neutral amino acid and a hydrophilic amino acid, a polyfunctional polymer and an organic acid ammonium salt are prepared and then the amino acid monomer is graft polymerized to the polyfunctional polymer in the presence of the organic acid ammonium salt at a temperature that is not less than the melting temperature of the organic acid ammonium salt.