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US 4,085,062 AGranted
N,N'-bis-aromaticformamidines useful as sunscreening agents
AssigneeGivaudan SA
InventorsJoseph A. Virgilio, Milton Manowitz
Life of this patent
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Abstract
U.V. absorbing compositions containing substituted N,N'-bis-aromaticformamidines and the use thereof as sun-screening agents.
Claims28
An ultraviolet absorbing composition comprising an effective ultraviolet absorbing amount of a compound of the formula ##STR5## wherein:
- A represents --COOR, --COOH, --CONR'R, --NR'COR, --C.tbd.N or a phenyl group
- wherein:
- the R is an alkyl radical of from one to eight carbons and R' and R" group may be the same or different and are chosen from the group consisting of hydrogen and lower alkyl radicals of from one to four carbons;
- and at least one organic material subject to degradation by ultraviolet light.
1 more element
The method of claim 19 wherein the amount of compound incorporated is between 0.01 wt percent to 4.0 wt percent.
The method of claim 19 wherein the amount of compound incorporated is between 0.05 wt percent to 2.0 wt percent.
Dependencies are inferred from the claim text.