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US 10,238,585 B2Granted
Oil-in-water emulsion sunscreen cosmetic
AssigneeShiseido Company, Ltd.
InventorsKahori Ishida, Taichi Harada, Yosuke Ikebe
Life of this patent
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Abstract
The present invention is intended to provide an organic UV absorber-free, non-chemical sunscreen cosmetic that contains hydrophobized zinc oxide and/or hydrophobized titanium dioxide as a UV scattering agent, specifically an oil-in-water emulsion sunscreen cosmetic that provides excellent emulsion stability and an excellent pleasant feel while maintaining high levels of UV protection.
Claims5
An organic UV absorber-free, oil-in-water emulsion sunscreen cosmetic that comprises:
- (A) zinc oxide and/or titanium dioxide;
- (B) isostearic acid;
- (C) a silicone containing a carboxyl group;
- (D) a non-ionic surfactant;
- (E) sodium carboxymethyl cellulose;
- and
- (F) water;
- wherein said (A) zinc oxide and/or titanium dioxide is:
- hydrophobized with octyltriethoxysilane and/or dimethylpolysiloxane;
- and
- homogeneously dispersed in an oil phase with said (C) silicone containing a carboxyl group acting as a dispersant;
- and
- wherein the dispersibility of the zinc oxide or the titanium dioxide lowers without said (B) isostearic acid wherein (C) the silicone containing a carboxyl group is carboxydecyl trisiloxane.
10 more elements
Dependencies are inferred from the claim text.