Ink-jet printing compositions containing macrocyclic polyethers
AssigneeHewlett-Packard Company
InventorRobert J. Miller
Life of this patent
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Abstract
An improved ink suitable for use in ink-jet printers is provided. The ink includes (a) a vehicle comprising at least one member selected from the group consisting of water and a water-soluble, non-aqueous component, and (b) an anionic dye having cations associated therewith. The ink composition is characterized by further including a macrocyclic polyether associated with the cations, the macrocyclic polyether having binding sites and a cavity size suitable for complexing the cations. The ink composition of the invention evidences reduced crusting, increased fade resistance and, for use in thermal ink-jet printers, reduced kogation.
Claims32
Ink composition for ink-jet printers including
- (a) a vehicle comprising at least one member selected from the group consisting of water and a water-soluble, non-aqueous component, and
- (b) an anionic dye having cations associated herewith, characterized in that said ink composition further includes a macrocyclic polyether associated with said cations, the macrocyclic polyether having binding sites and a cavity size suitable for complexing said cations.
Ink composition for ink-jet printers comprising
- (a) a vehicle comprising a mixture of water and at least one glycol selected from the group consisting of ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, polyethylene glycol and monomethyl ether derivatives thereof and
- (b) an anionic dye having sodium cations associated therewith, said dye present in an amount ranging from about 1 to 8% by weight-volume, characterized in that said ink composition further comprises a macrocyclic polyether selected from the group consisting of 15-Crown-5, 18-Crown-6, dibenzo-18-Crown-6 and dicyclohexane-18-Crown-6, having binding sites for complexing said sodium cations, said macrocyclic polyether present in an effective amount to reduce crusting and fading associated with an ink-jet printer and additionally kogation associated with a thermal ink-jet printer.
A process for improving the properties of an ink employed in ink-jet printing, said ink comprising a vehicle and an anionic dye having cations associated therewith, said vehicle comprising at least one member selected from the group consisting of water and a water-soluble, non-aqueous component, characterized in that a macrocyclic polyether is added to complex said cations, the macrocyclic polyether having binding sites and a cavity size suitable for complexing said cations.
Ink composition for ink-jet printers consisting essentially of
- (a) water,
- (b) a water-soluble, non-aqueous component selected from the group consisting of glycols, the monomethyl ether derivatives thereof, short chain alcohols, alkanol amines, amides, sulfoxides, sulfones, and heterocyclic amines,
- (c) an anionic dye having cations associated therewith and
- (d) a macrocyclic polyether having binding sites and a cavity size suitable for complexing said cations.
A process for improving the properties of an ink employed in ink-jet printing, said ink consisting essentially of
- (a) water,
- (b) a water-soluble, non-aqueous component selected from the group consisting of glycols, the monomethyl ether derivatives thereof, short chain alcohols, alkanol amines, amides, sulfoxides, sulfones, and heterocyclic amines, and
- (c) an anionic dye having cations associated therewith, characterized in that a macrocyclic polyether is added to complex said cations, the macrocyclic polyether having binding sites and a cavity size suitable for complexing said cations.
Dependencies are inferred from the claim text.