PROBLEM TO BE SOLVED: To provide a method for producing an amino acid-modified organopolysiloxane by reacting an amino-modified organopolysiloxane and L-asparaginyl-L-phenylalanine methyl ester as an amino acid derivative, and a cosmetic containing the amino acid-modified organopolysiloxane, which can solve the problems when blended in hair cosmetics and skin cosmetics.SOLUTION: Provided is a method for producing an amino acid-modified organopolysiloxane, wherein L-asparaginyl-L-phenylalanine methyl ester or cyclo(L-asparaginyl-L-phenylalanine) and an amino-modified organopolysiloxane are reacted. According to the invention, there can be obtained an amino acid-modified organopolysiloxane by a simple process, which, when blended in a cosmetic, provides a moist feeling and smoothness and shows excellent durability.COPYRIGHT: (C)2014,JPO&INPIT【解決手段】L-アスパラギニル-L-フェニルアラニンメチルエステル又はシクロ(L-アスパラギニル-L-フェニルアラニン)とアミノ変性オルガノポリシロキサンとを反応させることを特徴とするアミノ酸変性オルガノポリシロキサンの製造方法。【効果】本発明によれば、化粧料に配合した場合、しっとり感や滑らかさを与え、持続性も良好なアミノ酸変性オルガノポリシロキサンを簡単な工程で製造することができる。【選択図】なし
