YELLOW AZO DYES FOR INK JET PRINTING

摘要

A process for printing an image on a substrate by means of an ink-jet printer which comprises applying thereto a composition comprising a liquid medium and a mono-azo compound of Formula (1) and salts thereof; wherein: D is an optionally substituted aryl group carrying at least one direct substituent selected from the group consisting of -SO₃H, -CO₂H, -PO₃H₂ or an optionally substituted nitrogen heteroaryl group carrying at least one direct substituent selected from the group consisting of -SO₃H, -CO₂H, -PO₃H₂; R₁ is H: optionally substituted alkyl: amino: -NR⁴R⁵; wherein R⁴ is H, optionally substituted alkyl, optionally substituted alkoxy, optionally substituted acyl, optionally substituted aryl, optionally substituted heterocyclyl; and R⁵ is optionally substituted alkyl, optionally substituted alkoxy, optionally substituted acyl, optionally substituted aryl, optionally substituted heterocyclyl: -OR⁶; wherein R⁶ is H or optionally substituted alkyl: or -SR⁷; wherein R⁷ is optionally substituted alkyl; R² and R³ are each independently preferably amino: -NR⁴R⁵; wherein R⁴ is H, optionally substituted alkyl, optionally substituted alkoxy, optionally substituted acyl, optionally substituted aryl, optionally substituted heterocyclyl; and R⁵ is optionally substituted alkyl, optionally substituted alkoxy, optionally substituted acyl, optionally substituted aryl, optionally substituted heterocyclyl: hydroxy -OR⁶; wherein R⁶ is H or optionally substituted alkyl: or -SR⁷; wherein R⁷ is optionally substituted alkyl; X is H, or an electron withdrawing group, or X together with R³ forms an optionally substituted five or six membered carbocycle. Also compositions and inks, compounds and ink-jet printer cartridges.