Ink compositions containing azo dyes for ink jet printing
AssigneeIlford Imaging Switzerland GmbH
InventorKurt Baettig
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Abstract
There is described novel azo dyes of formula (4) with high water solubility for use in aqueous inks, particularly for ink jet recording, which provide images having high water, smudge and light resistance ##STR1## wherein n, m are each independently 2 to 6; R is hydrogen or an aliphatic radical having from 1 to 6 atoms; M is hydrogen, a metal atom, preferentially an alkali metal, an ammonium or ammonium substituted with alkyl, alkoxyalkyl or hydroxyalkyl each having 1 to 12 C atoms and F represents a mono-azo or a poly-azo dye residue.
Claims15
An ink composition for ink let printing comprising at least one azo dye having a formula (4) ##STR11## where n,m are each independently 2 to 6;
- R is hydrogen or an aliphatic radical having from 1 to 6 C atoms;
- M is hydrogen or a metal atom, an ammonium or ammonium substituted with alkyl, alkoxyalkyl and hydroxyalkyl each having 1 to 12 C atoms;
- and
- F represents a mono-azo or poly-azo dye radical.
Dependencies are inferred from the claim text.