Patent ID: 7141685

Claim:
An anthraquinone dye compound having the formula: wherein: R is selected from hydrogen or 1–3 groups selected from C 1 –C 6 -alkyl, C 1 –C 6 -alkoxy and halogen; X 3 is selected from —CO 2 —, —SO 2 N(Y)—, wherein Y is selected from the group consisting of hydrogen, C 1 –C 6 -alkyl, substituted C 1 –C 6 -alkyl, C 3 –C 8 -cycloalkyl, C 3 –C 8 -alkenyl, aryl and -L-Z-Q; L is a divalent linking group selected from C 1 –C 8 -alkylene, C 1 –C 6 -alkylene-arylene, arylene, C 1 –C 6 -alkylene-arylene-C 1 –C 6 -alkylene, C 3 –C 8 -cycloalkylene, C 1 –C 6 -alkylene-C 3 –C 8 -cycloalkylene-C 1 –C 6 -alkylene, C 1 –C 6 -alkylene-Z 1 -arylene-Z 1 -C 1 –C 6 -alkylene and C 2 –C 6 -alkylene-[-Z 1 -C 2 –C 6 -alkylene-] n - wherein Z 1 is selected from —O—, —S—and —SO 2 —and n is 1–3; and Z is a divalent group selected from —O—, —S—, —NH—, —N(C 1 –C 6 -alkyl)-, —N(C 3 –C 8 alkenyl)-, —N(C 3 –C 8 cycloalkyl)-, —N(aryl)-, —N(SO 2 C 1 –C 6 -alkyl) and —N(SO 2 aryl)-, provided that when Q is a photopolymerizable optionally substituted maleimide radical, Z represents a covalent bond; Q is an ethylenically-unsaturated, photosensitive polymerizable group.