Patent ID: 7105688

Claim:
An anthraquinone colorant having the structure in Formula I: wherein: R is a divalent linking group selected from the group consisting of —C 2 –C 8 -alkylene-, —(C 2 –C 4 -alkylene-Z) n —C 2 –C 4 -alkylene-, —C 2 –C 6 -alkylene-O-arylene-O—C 2 –C 6 -alkylene-, -arylene-O—C 1 –C 6 -alkylene-, —CH 2 -1,4-cyclohexylene-CH 2 — and -arylene-C 1 –C 6 -alkylene-; Z is —O—, —S—, —N(SO 2 R 4 )—, —N(R 3 )CO— or —N(COR 5 )—; R 1 is —NHSO 2 R 2 or NHCOR 2 ; R 2 is C 1 –C 6 -alkyl, C 3 –C 8 -cycloalkyl or aryl; Y is —O— or —N(R 3 )—; R 3 is hydrogen, C 1 –C 6 -alkyl, C 3 –C 8 -cycloalkyl or aryl; R 4 is C 1 –C 6 -alkyl, C 3 –C 8 -cycloalkyl or aryl; R 5 is C 1 –C 6 -alkyl, C 1 –C 6 -alkoxy, C 3 –C 8 -cycloalkyl or aryl; n is an integer from 1 to 3; and Q is an ethylenically unsaturated, photopolymerizable or free radical initiated polymerizable group.