| abstract |
(57) [Summary] [Structure] A cosmetic base material comprising a vinyl-based polymer containing a vinyl-based unit having a peptide or amino acid represented by the general formula (I) introduced therein. [Chemical 1] [In the formula, 1 to 2 of R 1 to R 4 are -A-peptides or -A-amino acids, and the rest are hydrogen, methyl groups, phenyl groups, carboxyl groups or salts thereof, and carboxylic acid having 1 to 1 carbon atoms. An alkyl ester of 6 or a carboxylic acid amide. The above A is a group containing at least one of carbon, hydrogen, nitrogen, oxygen, sulfur and silicon]. [Effect] The above-mentioned cosmetic base material can be used as a gelling agent, a thickening agent, a setting agent and a filming agent which are safe and have less strange feeling, and also has an action of protecting hair and skin. |