PROBLEM TO BE SOLVED: To provide a novel alkyl oxirane derivative not remaining stickiness or stiffness when being blended into a cosmetic for hair or the like, and having excellent slipperiness when draining from hair after rinsing.SOLUTION: In an alkyl oxirane derivative expressed in formula (1), MH and ML calculated from a chromatogram determined by gel permeation chromatography measurement satisfy a relation of formula (2). Z-[O-(AO)n-H]x...(1) (Z shows a residue obtained by removing all hydroxyl groups from a compound having a carbon number of 1-22 and 1-6 hydroxyl groups, x shows a number of 1-6, and AO shows an oxyalkylene group having a carbon number of 3, and n shows a number of 25 or larger): 0.35≤ML/MH≤0.75...(2).SELECTED DRAWING: Figure 1COPYRIGHT: (C)2018,JPO&INPIT【課題】毛髪用化粧料等に配合した際にべたつきやごわつきが残らず、さらにすすぎ終わった後、髪の水を切る際のすべり性に優れた新規アルキルオキシラン誘導体の提供。【解決手段】式(1)で表され、かつゲル浸透クロマトグラフィー測定により求められるクロマトグラムから算出されるMHとMLとが、式(2)の関係を満足するアルキルオキシラン誘導体。Z-[O-(AO)n-H]x・・・・(1)(Zは、炭素数1~22で、1~6個の水酸基を有する化合物から全ての水酸基を除いた残基を示し、xは1~6の数を示し、AOは炭素数3のオキシアルキレン基を示し、nは25以上の数を示す。)0.35≦ML/MH≦0.75・・・・(2)【選択図】図1
