Water-in-oil emulsion sunscreen cosmetic
AssigneeShiseido Company, Ltd.
InventorsAyumu Enomoto, Keita Nishida
Life of this patent
Estimating the term…
Abstract
[Problem] An objective of the present invention is to provide a water-in-oil emulsion sunscreen cosmetic that allows a medicinal agent to be blended into the internal phase, while having high ultraviolet protection power. [Solution] The sunscreen cosmetic of the present invention is characterized by comprising: (A) an ultraviolet absorbing agent; (B) a medicinal agent selected from the group consisting of L-ascorbic acid and derivatives thereof, tranexamic acid and derivatives thereof, alkoxysalicylic acid and derivatives thereof, glycyrrhizinic acid and derivatives thereof, and nicotinic acid and derivatives thereof; (C) a water-soluble thickener that is not sugar-derived; and (D) water.
Claims4
A water-in-oil emulsion sunscreen cosmetic comprising:
- (A) an ultraviolet absorbing agent;
- (B) a medicinal agent selected from the group consisting of L-ascorbic acid and derivatives thereof, tranexamic acid and derivatives thereof, alkoxysalicylic acid and derivatives thereof, glycyrrhizinic acid and glycyrrhizinic acid salts, and nicotinic acid and derivatives thereof;
- (C) a water-soluble thickener that is not sugar-derived;
- and
- (D) water,
- wherein the (C) water-soluble thickener is a single type or a combination of two or more types selected from sodium polyacrylate, (acrylates/C10-30 alkyl acrylate) crosspolymer, carboxyvinyl polymer, (PEG-240/decyl tetradeceth-20/hexamethyl diisocyanate) copolymer, (dimethylacrylamide/sodium acryloyldimethyl taurate) crosspolymer, and (acrylates/steareth-20 methacrylate) copolymer.
Dependencies are inferred from the claim text.