Kao Corporation

Mituru Sugiyama

Yoshinori Nishizawa

Yoshiya Sugai

Masahide Hoshino

The present invention relates to a composition for external application, a humectant and a skin barrier function reinforcing agent, each containing a diamide derivative represented by the following formula (1): (wherein, Rand Rare the same or different and each represents a Chydrocarbon group, Rand Rare the same or different and each represents a divalent Chydrocarbon group, Rs are the same or different and each represents a divalent Chydrocarbon group and n stands for 1 to 100). The composition for external application, humectant and skin barrier function reinforcing agent basically improve the water retaining ability and barrier functions of the horny layer, are excellent in miscibility and mixing stability and can be prepared efficiently at a low cost.

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Haga-gun, Japan

Mituru Sugiyama