公开(公告)号：US20240148616A1

公开(公告)日：2024-05-09

申请号：US18548273

申请日：2022-03-17

申请人： SHISEIDO COMPANY, LTD.

发明人： Takehito SHISHIDO ,  Kei UJIMOTO ,  Ryushi FUKUHARA

IPC分类号： A61K8/06 ,  A61K8/41 ,  A61K8/58 ,  A61Q19/00

CPC分类号： A61K8/064 ,  A61K8/416 ,  A61K8/585 ,  A61Q19/00 ,  A61K2800/10 ,  A61K2800/612 ,  A61K2800/80

摘要： A water-in-oil emulsion composition includes:



an external oil phase, in which a first hydrophobic powder is dispersed; and
an internal aqueous phase, in which a second hydrophobic powder is dispersed,
in which, among the first hydrophobic powder and the second hydrophobic powder, at least the second hydrophobic powder is a metal oxide treated with trimethylethoxysilane,
in which the water-in-oil emulsion composition further includes a dispersant that disperses the second hydrophobic powder in the internal aqueous phase, and
in which the dispersant is at least one of a silicone-based surfactant and a cationic surfactant.