| abstract |
The present invention describes certain poly-methine compounds having the formula (I), wherein each R1 is selected independently from cyano, carboxy, alkenyloxycarbonyl, substituted or unsubstituted alkoxycarbonyl; cycloalkoxycarbonyl or aryloxycarbonyl radical; substituted or unsubstituted carbocyclic or heterocyclic aryl radical; substituted or unsubstituted alkanoyl, cycloalkanoyl or aroyl radical; substituted or unsubstituted alkanoyl, cycloalkanoyl or aroyl radical; substituted or unsubstituted carbamoyl radical; or alkysulfonyl, cycloalkylsulfonyl or arylsulfonyl radical, substituted or not; each R2 is independently selected from cyano or a substituted or unsubstituted alkoxycarbonyl, cycloalkoxycarbonyl or aryloxycarbonyl radical; each A is independently selected from a radical of 1,2-phenylene or 1,2-naphthylene substituted or not; each Z is independently selected from -0- or -S-; and L is an organic bonding group linked by non-oxo carbon atoms to each Z atom. The present invention also describes sunscreen formulations and polymer compositions containing at least one of the poly-methine compounds or its reactive residue. |