| 摘要 |
PROBLEM TO BE SOLVED: To obtain a humectant having excellent humectant properties, touch, etc., and capable of sustaining humectant effects for a long period even with perspiration or water or after washing away and useful for cosmetics and detergent compositions by including a specific polyether. SOLUTION: This humectant is obtained by including a polyether represented by the formula [X]m-[Y]n [X is represented by formula I or the like; R1 to R3 are each H, methyl or ethyl; R4 is H or a 1-32C hydrocarbon; (a) is 1 or 2; Y is a group derived from a monomer copolymerizable with an epoxide represented by formula II or the like; m/(m+n) is 0.2-1, with the proviso that (m+n) is >=12]. The above polyether is preferably contained in an amount of 0.1-5 wt.% based on the whole composition in a cosmetic and further preferably contained in an amount of 0.2-5 wt.% based on the whole composition in a detergent composition. The above polyether is obtained by polymerizing, e.g. glycidol in the presence of a catalyst such as samarium tris(tetramethylheptanedionate).
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