Non-Aqueous Quinacridone Dispersions Using Dispersion Synergists

12:

• The non-aqueous pigment dispersion according to claim 11, wherein the at least one carboxyl group or a salt thereof is selected from the group consisting of an alkanoic acid group, an alicyclic acid group, a heterocyclic acid group, a hetero-aromatic acid group, an aromatic acid group, or salts thereof.

13:

• The non-aqueous pigment dispersion according to claim 12, wherein the aromatic acid group or a salt thereof is a benzoic acid group, a phtalic acid group, an isophtalic acid group, a terephtalic acid group, or salts thereof.

14:

• The non-aqueous pigment dispersion according to claim 11, wherein the salt of the at least one carboxyl group is an ammonium acid salt group.

15:

• The non-aqueous pigment dispersion according to claim 14, wherein the ammonium acid salt group is a substituted ammonium group selected from the group consisting of +N(CH3)2(C18H37)2, +NH(CH3)2(C18H37), +N(CH3)2(C12H25)2, +NH(CH3)2(C12H25), +N(CH3)2(C10H21)2, +NH(CH3)2(C10H21), +N(CH3)2(C8H17)2, +NH(CH3)2(C8H17), +NH(C8H17)3, +NH(C10H21)3, +NH(C12H25)3, and +NH(C18H35)3.

16:

• The non-aqueous pigment dispersion according to claim 11, wherein the at least one carboxyl group or a salt thereof further includes a sulfonic acid or a salt thereof and/or a phosphoric acid or a salt thereof.

17:

• The non-aqueous pigment dispersion according to claim 11, wherein the pigment dispersion is a curable inkjet ink.

18:

• The non-aqueous pigment dispersion according to claim 11, wherein the pigment dispersion is a non-aqueous inkjet ink containing an organic solvent and/or oil.

19:

• The non-aqueous pigment dispersion according to claim 11, wherein the quinacridone pigment is selected from the group consisting of C.I. Pigment Violet 19, C.I. Pigment Red 122, C.I. Pigment Red 202, and mixed crystals of quinacridone pigments.