Composition containing a non-photocatalytic metal oxide and tocopherol, its use in the cosmetics and/or dermatological field and processes employing it
AssigneeL'oreal
InventorsBoudiaf Boussouira, Quang Lan Nguyen
Life of this patent
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Abstract
Cosmetic and/or dermatological compositions containing a non-photocatalytic metal oxide and tocopherol and, optionally, a metal-inactivating complexing agent are effective for inhibiting the light-induced peroxidation of lipids, and in particular lipids of sebaceous origin such as squalene.
Claims21
A method of inhibiting the photoperoxidation of an unsaturated lipid, comprising contacting said unsaturated lipid with a composition comprising at least one non-photocatalytic metal oxide, at least one tocopherol and a metal-inactivating complexing agent, wherein
- said at least one non-photocatalytic metal oxide is selected from the group consisting of zinc oxides, titanium oxides, selenium oxides, cerium oxides, magnesium oxides, zirconium oxides and a mixture thereof, present in an amount of from 0.1 to 5% by weight based on the total weight of said composition;
- said at least one tocopherol is selected from the group consisting of .alpha.-tocopherol, .beta.-tocopherol, .gamma.-tocopherol, .delta.-tocopherol and a mixture thereof, present in an amount of from 0.02 to 6% by weight, based on the total weight of said composition;
- and
- said metal inactivating complex is selected from the group consisting of ethylenediaminetetra(methylenephosphonic acid),
- diethylenetriaminepenta(methylenephosphonic acid), and sodium salts thereof, present in an amount of 0.005 to 0.3% by weight, based on the total weight of said composition.
A method for combating skin irritation, inflammation, immunosuppression, acne and a mixture thereof which are induced by light, comprising applying to skin a composition which comprises at least one non-photocatalytic metal oxide, at least one tocopherol and a metal-inactivating complexing agent wherein
- said at least one non-photocatalytic metal oxide is selected from the group consisting of zinc oxides, titanium oxides, selenium oxides, cerium oxides, magnesium oxides, zirconium oxides and a mixture thereof, present in an amount of from 0.1 to 5% by weight based on the total weight of said composition;
- said at least one tocopherol is selected from the group consisting of .alpha.-tocopherol, .beta.-tocopherol, .gamma.-tocopherol, .delta.-tocopherol and a mixture thereof, present in an amount of from 0.02 to 6% by weight, based on the total weight of said composition;
- and
- said metal inactivating complex is selected from the group consisting of ethylenediaminetetra(methylenephosphonic acid),
- diethylenetriaminepenta(methylenephosphonic acid), and sodium salts thereof, present in an amount of 0.005 to 0.3% by weight, based on the total weight of said composition.
Dependencies are inferred from the claim text.