Trisazo compounds, and dye compositions containing same
AssigneeCanon Kabushiki Kaisha
InventorsTsuyoshi Eida, Mayumi Yamamoto, Takao Yamamoto
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Abstract
Disclosed herein is an azo compound represented by the formula ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 each are a group or atom selected from the group consisting of a hydrogen atom, alkyl groups having 1 to 4 carbon atoms, a methoxy group, halogen atoms, COOM and COOR.sub.4 in which R.sub.4 is an alkyl group having 1 to 4 carbon atoms, and M denotes an alkali metal atom, or an ammonium or organic ammonium ion. An ink containing this compound is suitable for use in an ink-jet recording.
Claims19
An azo compound represented by the formula ##STR19## wherein R.sub.1, R.sub.2 and R.sub.3 each are selected from the group consisting of hydrogen, an alkyl having 1 to 4 carbon atoms, methoxy, halogen, COOM and COOR.sub.4, and in which R.sub.4 is an alkyl having 1 to 4 carbon atoms, and M denotes an alkali metal, ammonium or at least one of ethylammonium and ethanol ammonium.
A black dye composition comprising, as a principal component, an azo compound represented by the formula ##STR21## wherein R.sub.1, R.sub.2 and R.sub.3 each are selected from the group consisting of hydrogen, an alkyl having 1 to 4 carbon atoms, methoxy, halogen, COOM and COOR.sub.4, and in which R.sub.4 is alkyl having 1 to 4 carbon atoms, and M denotes an alkali metal, ammonium or at least one of ethylammonium and ethanol ammonium.
An ink comprising a recording agent and a liquid medium dissolving or dispersing the recording agent therein, wherein the ink contains, as the recording agent, an azo compound represented by the formula ##STR23## wherein R.sub.1, R.sub.2 and R.sub.3 each are selected from the group consisting of hydrogen, an alkyl having 1 to 4 carbon atoms, methoxy, halogen, COOM and COOR.sub.4, and in which R.sub.4 is an alkyl having 1 to 4 carbon atoms, and M denotes an alkali metal, ammonium or at least one of ethylammonium and ethanol ammonium.
Dependencies are inferred from the claim text.