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US 8,475,578 B2Granted
Magenta inks and ink sets for ink-jet imaging
AssigneeHewlett-Packard Development Company, L.P.
InventorsTye J. Dodge, Murray Macleod, Marlene Ann McGorrin, Larrie Deardurff, Linda C. Uhlir-Tsang
Life of this patent
Estimating the term…
Abstract
The present invention is directed to magenta inks and ink sets for ink-jet printing. The inks and ink sets provide exceptional ozone fastness, particularly when printed on porous media or plain paper. The inks of the ink sets are formulated to be compatible with each other and are capable of producing high quality printed images.
Claims42
A magenta ink jet ink, comprising:
- (a) a magenta dye having the structure:
- wherein
- R21, R23, R25, R27R29, and R31 are independently a hydrogen atom or sulfonate group;
- R22 is a hydrogen atom or nitro group;
- R26 and R28 are independently a hydrogen atom or methyl group;
- R24 and R30 are independently a methyl or sulfonate group;
- and
- R32 is a methyl or methoxy group;
- and
- (b) a second magenta dye having the structure:
- including potassium, sodium, lithium, and ammonium salts thereof;
- wherein the ink further includes calcium cations, magnesium cations, or a combination of calcium and magnesium cations at from about 1,000 ppm to 20,000 ppm.
9 more elements
An ink set for ink jet printing, comprising:
- (a) a cyan ink including a cyan dye having the structure:
- wherein
- M is a hydrogen atom;
- a metal atom;
- or an oxide, hydroxide, or halide of the metal atom;
- Pc is a phthalocyanine nucleus;
- R1 and R2 are independently a substituent selected from the group consisting of —SOX1, —SO2X1, SO2NX2X3, —SO3X4;
- where X1, X2, X3, and X4 are independently a hydrogen atom, a substituted or unsubstituted C1 to C7 alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heterocyclic group;
- wherein at least one of R1 or R2 has an ionic hydrophilic group as a substituent;
- and
- k and 1 are independently an integer ranging from 1 to 3, where the sum of k and 1 is 4;
- (b) a magenta ink, comprising:
- (i) a magenta dye having the structure:
- wherein
- R21, R23, R25, R27,R29, and R31 are independently a hydrogen atom or sulfonate group;
- R22 is a hydrogen atom or nitro group;
- R26 and R28 are independently a hydrogen atom or methyl group;
- R24 and R30 are independently a methyl or sulfonate group;
- and
- R32 is a methyl or methoxy group;
- (ii) a second magenta dye having the structure:
- including potassium, sodium, lithium, and ammonium salts thereof;
- and
- (c) a yellow ink;
- wherein the magenta ink further includes calcium cations, magnesium cations, or a combination of calcium and magnesium cations at from about 1,000 ppm to 20,000 ppm.
22 more elements
The ink set of 7, wherein at least one ink of the ink set further comprises a phenylenediamine compound derivative having the structure:
- wherein M is a monovalent ion.
A magenta ink jet ink, comprising:
- (a) a magenta dye having the structure:
- wherein
- R21, R23, R25, R27, R29, and, R31 are independently a hydrogen atom or sulfonate group;
- R22 is a hydrogen atom or nitro group;
- R26 and R28 are independently a hydrogen atom or methyl group;
- R24 and R30 are independently a methyl or sulfonate group;
- and
- R32 is a methyl or methoxy group;
- and
- (b) a second magenta dye which has a chroma (C) value of at least 60 when printed on plain paper at a 5 wt % dye load.
7 more elements
An ink set for ink jet printing, comprising:
- (a) a cyan ink including a cyan dye having the structure:
- wherein
- M is a hydrogen atom;
- a metal atom;
- or an oxide, hydroxide, or halide of the metal atom;
- Pc is a phthalocyanine nucleus;
- R1 and R2 are independently a substituent selected from the group consisting of —SOX1, —SO2X1, SO2NX2X3, —SO3X4;
- where X1, X2, X3, and X4 are independently a hydrogen atom, a substituted or unsubstituted Cl to C7 alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heterocyclic group;
- wherein at least one of R1 or R2 has an ionic hydrophilic group as a substituent;
- and
- k and 1 are independently an integer ranging from 1 to 3, where the sum of k and 1 is 4;
- (b) a magenta ink including a magenta dye having the structure:
- wherein
- R21, R23, R25, R27, R29, and R31 are independently a hydrogen atom or sulfonate group;
- R22 is a hydrogen atom or nitro group;
- R26 and R28 are independently a hydrogen atom or methyl group;
- R24 and R30 are independently a methyl or sulfonate group;
- and
- R32 is a methyl or methoxy group, and
- (c) a yellow ink;
- and
- (d) a black ink including a black pigment,
- wherein at least one of the cyan, magenta, or yellow inks includes at least one salt which causes the black pigment to precipitate upon contact when printed on media;
- wherein the salt further comprises calcium cations, magnesium cations, or a combination of calcium and magnesium cations at from about 1,000 ppm to 20,000 ppm.
21 more elements
Dependencies are inferred from the claim text.