4-(1,1-Dimethylethyl)-4'-methoxydibenzoylmethane
AssigneeGivaudan SA
InventorKarl-Fred De Polo
Life of this patent
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Abstract
The novel 4-(1,1-Dimethylethyl)-4'-methoxydibenzoylmethane is useful as a sunscreen agent. It exhibits outstanding UV-A absorbing qualities in that it brings about a considerable retardation in the ageing of the skin with excellent skin tolerance and stability (light, heat and moisture). 4-(1,1-Dimethylethyl)-4'-methoxydibenzoylmethane furthermore improves the protective action of UV B-filters, i.e. of substances which absorb the erythema-producing UV B-radiation in the range of about 290 to 320 mm.
Claims17
4-(1,1-Dimethylethyl)-4'-methoxydibenzoylmethane.
A light-screen composition comprising an effective ultra violet absorbing amount of 4-(1,1-dimethylethyl)-4'-methoxydibenzoylmethane and at least one other organic material.
A sun-screen composition comprising 2 wt. % to 5 wt. % of 4-(1,1-dimethylethyl)-4'-methoxydibenzoylmethane and 2.0 wt. % to 10.0 wt. % of 2-ethylhexyl p-methoxycinnamate.
A method for preparing a light screening composition which comprises incorporating 4-(1,1-dimethylethyl-4'-methoxydibenzoylmethane into a cosmetic base.
A topical preparation for application on the skin which comprises an effective amount of 4(1,1-dimethyl)-4'-methoxydibenzoylmethane as a UV-A absorber in a suitable carrier.
A method for protecting the skin from the effects of U.V.-A radiation which comprises applying to the skin an effective amount of 4-(1,1-dimethylethyl)-4'-methoxydibenzoylmethane in a carrier suitable for application on the skin.
Dependencies are inferred from the claim text.