| 主权项 |
1. A composition comprising a thiophene azo carboxylate dye having the structure of Formula I: wherein R1 is selected from the group consisting of H, CH3 and electron-withdrawing groups; wherein R2 is (CH2CH2O)yQ and R3 is (CH2CH2O)y.Q′; wherein y and y′ are integers independently selected from 1 to 39, wherein 8≦(y+y′)≦40; wherein Q and Q′ are independently selected from the group consisting of H and Y wherein Y is as defined below; with the proviso that the dye comprises at least one Q or Q′ group that is Y; and wherein Y is an organic radical represented by Formula II wherein independently for each Y group, M is H or a charge balancing cation; m is 0 to 5; n is 0 to 5; the sum of m+n is 1 to 10; each R4 is independently selected from the group consisting of H, C3-18 or C4-C18 linear or branched alkyl, C3-18 or C4-C18 linear or branched alkenyl, and mixtures thereof, and wherein at least one R4 group is not H. |
