| abstract |
(57) [Summary] [Purpose] When blended into hair cosmetics and skin cosmetics, It imparts luster and moisture to the hair, improves combability of the hair, prevents branching of the hair, imparts luster and moisture to the skin, smoothes the skin, and causes turbidity and precipitation during storage. A cosmetic substrate that does not occur is provided. A silyl group in which a functional group containing only one silicon atom represented by the following general formula (I) is covalently bonded to 50% or more and 75% or less of all amino groups including amino groups on the amino acid side chain of a peptide. The cosmetic base is constituted by the modified peptide. Embedded image [In the formula, R 1 , R 2 and R 3 represent a methyl group or a hydroxyl group, and R 1 , R 2 and R 3 may be the same, It may also be different. a is 1 or 3] |