Dye, ink containing the same, and ink-jet recording method and instrument using the ink
AssigneeCanon Kabushiki Kaisha
InventorTsuyoshi Eida
Life of this patent
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Abstract
Disclosed herein is a dye represented by the general formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are independently a radical selected from the Group B or a radical of the formula (i) or (ii), R.sub.5 is CH.sub.3 or COONH.sub.4, and R.sub.6, R.sub.7, R.sub.8 and R.sub.9 are independently a radical selected from the Group B or a radical of the formula (iii), with the proviso that in a molecule of the dye, the number of SO.sub.3 NH.sub.4 is 1 and the number of COONH.sub.4 is 2 or 3: Group B: H, OH, CH.sub.3, C.sub.1, COONH.sub.4 and SO.sub.3 NH.sub.4 ; ##STR2##
Claims33
A dye represented by the general formula ##STR11## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are independently a radical selected from the Group B or a radical of the formula (i) or (ii), R.sub.5 is CH.sub.3 or COONH.sub.4, and R.sub.6, R.sub.7, R.sub.8 and R.sub.9 are independently a radical selected from the Group B or a radical of the formula (iii), with the proviso that in a molecule of the dye, the number of SO.sub.3 NH.sub.4 radicals is 1 and the number of COONH.sub.4 radicals is 2 or 3:
- Group B:
- H, OH, CH.sub.3, Cl, COONH.sub.4 and SO.sub.3 NH.sub.4 ;
- ##STR12##
Dependencies are inferred from the claim text.