Polychromophoric ultraviolet stabilizers and their use in organic compositions

Claim 1

An organic composition susceptible to ultraviolet degradation stabilized against such degradation with a stabilizing amount of a composition of matter comprising compounds having the formula: ##EQU2## wherein A is a group having the structure: ##SPC12## wherein R 1 , r 2 , r 3 , r 4 and R 5 are hydrogen, hydroxy, chloro, bromo, fluoro, lower alkyl, substituted lower alkyl, cycloalkyl, substituted cycloalkyl, aryl, substituted aryl, lower alkylaryl, alkoxy, aryloxy, amino, substituted amino, cyano, carboalkoxy and the substituents R 1 and R 2 , R 2 and R 3 , R 3 and R 4 , and R 4 and R 5 combined with the carbon atoms to which they are attached, are joined alkylene groups completing a carbocyclic ring, which ring can also be substituted with one or more of the substituents listed above for R 1 , R 2 , R 3 , R 4 and R 5 ; B is a heterocyclic group having the structures ##SPC13## wherein X and Y are a carbon atom, a carbon atom containing an alkyl group having 1 to 12 carbon atoms, a carbon atom containing an aryl group having 6 to 18 carbon atoms or a nitrogen atom; Z is an oxygen atom, a sulfur atom, or a nitrogen atom containing a hydrogen atom or a substituted or unsubstituted lower alkyl group having 1 to 12 carbon atoms; I is hydrogen, chloro, bromo, fluoro, lower alkyl, substituted lower alkyl, cycloalkyl, substituted cycloalkyl, aryl, substituted aryl, lower alkylaryl, aryl-substituted-aryl, alkoxy, aryloxy, substituted amino and cyano, said I is present on all positions of the benzenoid ring, except the carbon atom attached to the heterocyclic ring and the carbon atom attached to the carbonyloxy or oxycarbonyl group, E is a substituted or unsubstituted alkylene and arylene and n is an integer from 1 to 6 wherein at least one of R 1 , R 5 or I ortho to the oxy of said carbonyloxy or oxycarbonyl group is hydrogen.