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US 6,746,525 B1Granted
Disazo dyes and inks containing them
AssigneeAvecia Limited
InventorMark Robert James
Life of this patent
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Abstract
A compound comprising a disazo chromaphore and an optionally substituted acyl group linked together through a —SO2—NH— group, inks comprising these compounds, ink jet printer cartridges containing these inks and their use in ink jet printing.
Claims19
A compound of Formula (1) or salt thereof, comprising a disazo chromophore and an optionally substituted acyl group linked together through a —SO2—NH— group:
- A—CO—NH—SO2—B—N═N—D—N═N—E Formula (1)
- wherein:
- A is an optionally substituted alkyl or aryl group;
- B and D are each independently optionally substituted phenylene or naphthylene;
- and
- E is optionally substituted naphthylene.
3 more elements
Dependencies are inferred from the claim text.