Use of novel naphthol as-pigment-mixtures in printing-materials

A printing ink comprising a pigment mixture including at least one pigment of each of the formulae (Ia) and (Ib)

• wherein, independently of one another,
• X1, X3 are carbamoyl, C1-C4-alkylcarbamoyl, di(C1-C4)-alkylcarbamoyl, sulfamoyl, phenylsulfamoyl, C1-C4-alkylsulfamoyl or di(C1-C4)-alkylsulfamoyl;
• X2, X4 are hydrogen, C1-C4-alkyl, C1-C4-alkoxy, halogen or nitro;
• Y1, Y2 are hydrogen, halogen or C1-C4-alkyl, C1-C4-alkoxy or C1-C4-alkoxycarbonyl;
• and
• Z1, Z2 are hydrogen, phenyl, naphthyl, benzimidazolonyl, substituted phenyl or substituted naphthyl, wherein the substituents are 1, 2, 3 or 4 and are selected from the group consisting of halogen, nitro, cyano, C1-C4-alkoxycarbonyl, carbamoyl, C1-C4-alkylcarbamoyl, di(C1-C4)-alkylcarbamoyl, phenylcarbamoyl, sulfamoyl, phenylsulfamoyl, C1-C4-alkylsulfamoyl, di(C1-C4)-alkylsulfamoyl, C1-C4-acylamino, C1-C4-alkyl and C1-C4-alkoxy, and wherein the pigments of the formulae (Ia) and (Ib) are different.

An electrophotographic toner or developer comprising a pigment mixture including at least one pigment of each of the formulae (Ia) and (Ib)

• wherein, independently of one another,
• X1, X3 are carbamoyl, C1-C4-alkylcarbamoyl, di(C1-C4)-alkylcarbamoyl, sulfamoyl, phenylsulfamoyl, C1-C4-alkylsulfamoyl or di(C1-C4)-alkylsulfamoyl;
• X2, X4 are hydrogen, C1-C4-alkyl, C1-C4-alkoxy, halogen or nitro;
• Y1, Y2 are hydrogen, halogen or C1-C4-alkyl, C1-C4-alkoxy or C1-C4-alkoxycarbonyl;
• and
• Z1, Z2 are hydrogen, phenyl, naphthyl, benzimidazolonyl, substituted phenyl or substituted naphthyl, wherein the substituents are 1, 2, 3 or 4 and are selected from the group consisting of halogen, nitro, cyano, C1-C4-alkoxycarbonyl, carbamoyl, C1-C4-alkylcarbamoyl, di(C1-C4)-alkylcarbamoyl, phenylcarbamoyl, sulfamoyl, phenylsulfamoyl, C1-C4-alkylsulfamoyl, di(C1-C4)-alkylsulfamoyl, C1-C4-acylamino, C1-C4-alkyl and C1-C4-alkoxy, and wherein the pigments of the formulae (Ia) and (Ib) are different.

An inkjet ink comprising a pigment mixture including at least one pigment of each of the formulae (Ia) and (Ib)

• wherein, independently of one another,
• X1, X3 are carbamoyl, C1-C4-alkylcarbamoyl, di(C1-C4)-alkylcarbamoyl, sulfamoyl, phenylsulfamoyl, C1-C4-alkylsulfamoyl or di(C1-C4)-alkylsulfamoyl;
• X2, X4 are hydrogen, C1-C4-alkyl, C1-C4-alkoxy, halogen or nitro;
• Y1, Y2 are hydrogen, halogen or C1-C4-alkyl, C1-C4-alkoxy or C1-C4-alkoxycarbonyl;
• and
• Z1, Z2 are hydrogen, phenyl, naphthyl, benzimidazolonyl, substituted phenyl or substituted naphthyl, wherein the substituents are 1, 2, 3 or 4 and are selected from the group consisting of halogen, nitro, cyano, C1-C4-alkoxycarbonyl, carbamoyl, C1-C4-alkylcarbamoyl, di(C1-C4)-alkylcarbamoyl, phenylcarbamoyl, sulfamoyl, phenylsulfamoyl, C1-C4-alkylsulfamoyl, di(C1-C4)-alkylsulfamoyl, C1-C4-acylamino, C1-C4-alkyl and C1-C4-alkoxy, and wherein the pigments of the formulae (Ia) and (Ib) are different.

A toner cartridge set comprising a yellow, magenta, cyan and black toner cartridge, wherein the magenta cartridge comprises a pigment mixture including at least one pigment of each of the formulae (Ia) and (Ib)

• wherein, independently of one another,
• X1, X3 are carbamoyl, C1-C4-alkylcarbamoyl, di(C1-C4)-alkylcarbamoyl, sulfamoyl, phenylsulfamoyl, C1-C4-alkylsulfamoyl or di(C1-C4)-alkylsulfamoyl;
• X2, X4 are hydrogen, C1-C4-alkyl, C1-C4-alkoxy, halogen or nitro;
• Y1, Y2 are hydrogen, halogen or C1-C4-alkyl, C1-C4-alkoxy or C1-C4-alkoxycarbonyl;
• and
• Z1, Z2 are hydrogen, phenyl, naphthyl, benzimidazolonyl, substituted phenyl or substituted naphthyl, wherein the substituents are 1, 2, 3 or 4 and are selected from the group consisting of halogen, nitro, cyano, C1-C4-alkoxycarbonyl, carbamoyl, C1-C4-alkylcarbamoyl, di(C1-C4)-alkylcarbamoyl, phenylcarbamoyl, sulfamoyl, phenylsulfamoyl, C1-C4-alkylsulfamoyl, di(C1-C4)-alkylsulfamoyl, C1-C4-acylamino, C1-C4-alkyl and C1-C4-alkoxy, and wherein the pigments of the formulae (Ia) and (Ib) are different.

An inkjet ink set comprising a yellow, magenta, cyan and black ink cartridge, wherein the magenta ink cartridge comprises a pigment mixture including at least one pigment of each of the formulae (Ia) and (Ib)

• wherein, independently of one another,
• X1, X3 are carbamoyl, C1-C4-alkylcarbamoyl, di(C1-C4)-alkylcarbamoyl, sulfamoyl, phenylsulfamoyl, C1-C4-alkylsulfamoyl or di(C1-C4)-alkylsulfamoyl;
• X2, X4 are hydrogen, C1-C4-alkyl, C1-C4-alkoxy, halogen or nitro;
• Y1, Y2 are hydrogen, halogen or C1-C4-alkyl, C1-C4-alkoxy or C1-C4-alkoxycarbonyl;
• and
• Z1, Z2 are hydrogen, phenyl, naphthyl, benzimidazolonyl, substituted phenyl or substituted naphthyl, wherein the substituents are 1, 2, 3 or 4 and are selected from the group consisting of halogen, nitro, cyano, C1-C4-alkoxycarbonyl, carbamoyl, C1-C4-alkylcarbamoyl, di(C1-C4)-alkylcarbamoyl, phenylcarbamoyl, sulfamoyl, phenylsulfamoyl, C1-C4-alkylsulfamoyl, di(C1-C4)-alkylsulfamoyl, C1-C4-acylamino, C1-C4-alkyl and C1-C4-alkoxy, and wherein the pigments of the formulae (Ia) and (Ib) are different.