Patent ID: 7172634

Claim:
An anthraquinone colorant having the structure in Formula I: wherein L is a covalent carbon-carbon bond or a linking group selected from the group consisting of â€”Oâ€”, â€”Sâ€”, â€”SO 2 â€”, â€”CON(R 2 )â€”, â€”N(COR 3 )â€”, â€”N(R 2 )COâ€”, and â€”N(SO 2 R 3 )â€”; R is a divalent organic radical selected from the group consisting of C 1 â€“C 6 -alkylene; C 1 â€“C 6 -alkylene-Yâ€”CH 2 CH 2 â€”; and CH 2 CH 2 m â€”Yâ€”CH 2 CH 2 â€”; R 1 is hydrogen or represents one or two groups selected from the group consisting of C 1 â€“C 6 -alkyl, C 1 â€“C 6 -alkoxy and halogen. R 2 is hydrogen, C 1 â€“C 6 -alkyl, C 3 â€“C 8 -cycloalkyl or aryl; R 3 is C 1 â€“C 6 -alkyl, C 3 â€“C 8 -cycloalkyl or aryl; X is â€”Oâ€” or â€”N(R 2 )â€”; Y is â€”Oâ€” â€”Sâ€”, â€”SO 2 â€”, â€”N(SO 2 R 3 )â€”, or â€”N(COR 3 )â€”; n is 1 or 2; m is 2 or 3; and Q is wherein: R 4 is hydrogen or C 1 â€“C 6 -alkyl; R 5 is hydrogen; C 1 â€“C 6 alkyl; phenyl; phenyl substituted with one or more groups selected from the group consisting of C 1 â€“C 6 -alkyl, C 1 â€“C 6 -alkoxy, â€”N(C 1 â€“C 6 -alkyl) 2 , nitro, cyano, C 1 â€“C 6 -alkoxycarbonyl, C 1 â€“C 6 -alkanoyloxy and halogen; 1- or 2-naphthyl; 1- or 2-naphthyl substituted with C 1 â€“C 6 -alkyl or C 1 â€“C 6 -alkoxy; 2- or 3-thienyl; 2- or 3-thienyl substituted with C 1 â€“C 6 -alkyl or halogen; 2- or 3-furyl; or 2- or 3-furyl substituted with C 1 â€“C 6 -alkyl; R 6 and R 7 are, independently, hydrogen, C 1 â€“C 6 -alkyl, or aryl; or R 6 and R 7 may be combined to represent a CH 2 3-5 radical; R 8 is hydrogen, C 1 â€“C 6 -alkyl, C 1 â€“C 8 -alkenyl, C 3 â€“C 8 -cycloalkyl or aryl; and R 9 is hydrogen, C 1 â€“C 6 -alkyl or aryl.