Photo stable organic sunscreen compounds with antioxidant properties and compositions obtained therefrom
AssigneeEM Industries
InventorRatan K. Chaudhuri
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Abstract
A compound of formula I 1 wherein A is a moiety which provides UV absorbing activity to the compound of formula I that comprises 1 divalent group or 2 monovalent groups, with at least one group having carbonyl (C═O) functionality. R6 is linear or branched C1-C8 alkyl and R5 is a linear or branched C1-C8 alkyl or hydrogen. Sunscreen formulations which contain these compounds and methods for using these compounds to prepare formulations are also provided.
Claims33
A compound of formula I
- 6
- wherein
- A is a moiety which is chromophoric within the UV radiation range of wavelengths to provide UV absorbing activity to the compound of formula I, wherein moiety A comprises one divalent group or two monovalent groups, with at least one group having carbonyl (C═O) functionality,
- R6 is independently linear or branched C1-C8 alkyl, and
- R5 is hydrogen or linear or branched C1-C8 alkyl.
A compound of formula II
- 7
- wherein
- R1 is selected from the group consisting of —C(O)CH3, —CO2R3, —C(O)NH2, —C(O)N(R4)2, and —CN;
- X is O or NH;
- R2 is linear or branched C1 to C30 alkyl;
- R3 is linear or branched C1 to C20 alkyl;
- and
- each R4 is independently hydrogen, or linear or branched C1 to C8 alkyl;
- R5 is linear or branched C1-C8 alkyl or hydrogen,
- and R6 is C1 to C8 alkyl.
A compound of one of the formulae
- 8
- wherein
- R1 is selected from the group consisting —C(O)CH3, —CO2(C1-C8 alkyl), —C(O)NH2, —C(O)N(C1-C4 alkyl)2, and —CN;
- X is O or NH;
- and
- R2 is C1-C12 alkyl, and
- R5 is C1-C8 linear or branched alkyl.
A personal care formulation which comprises a compound of formula I in an amount effective to protect formulation ingredients from oxidation.
Dependencies are inferred from the claim text.