Dibenzoyl resorcinol light stabilizer

Claim 1

A LIGHT STABLE COMPOSITION OF AMTTER COMPRISING AN ORGANIC THERMOPLASTIC SYNTHETIC POLYMERIC MATERIAL NORMALLY SUBJECT TO DISCOLORATION ON EXPOSURE TO LIGHT AND FROM 0.1 TO 10 PERCENT OF THE WEIGHT OF SAID THERMOPLASTIC OF A DIBENZOYL RESORCINOL COMPOUND AS A STABILIZER HAVING THE GENERAL FORMULA: WHEREIN R1 TO R5 INCLUSIVE, ARE SELECTED FROM THE GROUP CONSISTING OF H,CI,BR,F, AN ALKYL GROUP HAVING FROM 1-8 CARBON ATOMS, AND -COOR7 WHERE R7 IS SELECTED FROM THE GROUP CONSISTING OF AN ALKYL GROUP HAVING FROM 1-8 CARBON ATOMS, PHENYL, MONOCHLOROPHENYL, MONOBROMOPHENYL, AND R6 IS SELECTED FROM THE GROUP CONSISTING OF R1, BENZOYL AND BENZOYL SUBSTITUTED WITH R1 AND R2 THERE BEING NOT OVER 4 BROMINE ATOMS NOT OVER 3 FLUORINE ATOMS AND NOT OVER ONE -COOR7 GROUPS IN THE COMPOUND AND NOT OVER ONE -COOR7 GROUP ATTACHED TO ANY BENZENE RING AND WHEREIN ANY BENZOYL SUBSTITUENTS ON SAID DIBENZOYL RESORCINOL COMPOUND ARE POSITIONED IN NON-VICINAL RELATIONSHIP.