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AssigneeL'oreal
InventorsPascal Simon, Didier Gagnebien
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The present invention relates to a stable fluid water-in-oil emulsion, in particular a topical emulsion, comprising, as gelling agent, a polysaccharide alkyl ether formed from units containing at least two different monosaccharide rings, each unit containing at least one hydroxyl group substituted by a saturated hydrocarbon alkyl chain. The polysaccharide alkyl ether preferably has a weight average molecular weight greater than 200,000 and preferably is a guar gum alkyl ether having a degree of substitution of approximately 2 to 3. The emulsion obtained is stable, even in the absence of an electrolyte or a fatty substance commonly used to stabilize water-in-oil emulsions. It can in particular contain an active ingredient sensitive to electrolytes. The emulsion according to the invention can be used in particular in the cosmetics and/or dermatological fields.
A water-in-oil emulsion comprising an oil phase comprising at least one gelling agent, wherein said emulsion is fluid and wherein said gelling agent is a polysaccharide alkyl ether formed from units having at least two different monosaccharide rings, each unit having at least one hydroxyl group substituted by a saturated hydrocarbon chain, wherein said emulsion is free from electrolyte or from a solid fatty substance.
Process for the cosmetic or dermatological treatment of dry skin, comprising:
A method for stabilizing a water-in-oil emulsion, comprising adding to a fluid water-in-oil emulsion, a polysaccharide alkyl ether formed from units having at least two different monosaccharide rings, each unit having at least one hydroxyl group substituted by a saturated hydrocarbon chain, wherein said emulsion is free from electrolyte or from a solid fatty substance.
Process for treating a skin or a mucous membrane, comprising applying to said skin or mucous membrane an effective amount of a water-in-oil emulsion, said emulsion comprising at least one gelling agent, wherein said emulsion is fluid and wherein said gelling agent is a polysaccharide alkyl ether formed from units having at least two different monosaccharide rings, each unit having at least one hydroxyl group substituted by a saturated hydrocarbon chain, wherein said emulsion is free from electrolyte or from a solid fatty substance.
Dependencies are inferred from the claim text.