Patents

Shiseido Patents Water-in-Oil Emulsion Sunscreen

The formulation contains titanium dioxide, zinc oxide and dimethyldistearylammonium hectorite.

US Patent No. 11,801,207 B2 (Satoshi Yamaki, Kazutaka Sasaki, Takashi Matsui, Yurika Watanabe, Mayuri Tashiro, Yuko Nagare, Marianne Ayaka Touati, Kazuhiro Yamaguchi); Shiseido Company has patented a water-in-oil emulsion sunscreen cosmetic. It is comprised of a UV protective agent consisting of titanium dioxide and zinc oxide; dimethyldistearylammonium hectorite; an oil-phase-thickening agent consisting of at least one compound selected from the group consisting of dextrin palmitate, stearic acid and aluminum stearate; a silicone-based surfactant having an HLB of less than 8 consisting of at least one surfactant selected from the group consisting of PEG-10 dimethicone, PEG-9 polydimethylsiloxiethyldimethicone and bis-butldimethicone polygryceryl-3; one or more non-volatile liquid oils other than silicone oils; and polyoxyethylene-polyoxypropylene dialkyl ether.

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