Hot melt inks containing styrene or terpene polymers

A hot melt ink composition comprising (a) a styrene polymer or terpene polymer hardening component, (b) a nonpolymeric aromatic viscosity modifier, (c) a colorant, (d) an optional nonpolymeric aromatic ink vehicle, (e) an optional colorant dispersing agent, (f) an optional conductivity enhancing agent, (g) an optional antioxidant, and (h) an optional UV absorber, wherein the viscosity modifier is biphenylene, 4-acetylbiphenyl, 2-biphenyl carboxylic acid, 2,2′-biphenyldimethanol, 4,4′-dimethyl biphenyl, 2,2′-bis(bromomethyl)-1,1′-biphenyl, 4,4′-bis-(dimethylamino) biphenyl carbinol, 4-bromo biphenyl, diphenylfulvene, diphenyl sulfone, 1,2-diphenoxy ethane, triphenyl methane, fluorene, 9-fluorene methanol, 9-fluorene acetic acid, 3-amino fluoranthene, 1-amino fluorene, 2-amino fluorene, 9-bromo-9-phenylfluorene, 1-methyl fluorene, methyl-9-fluorenylidene acetate, 4,4′-(9-fluorenylidene) bis(2-phenoxy ethanol), N-(9-fluorenyl methoxy carbonyl)-valinol, 9-fluorenone, phenanthrene, 9-iodophenanthrene, 9-acetylphenanthrene, 9-amino phenanthrene, 1-amino pyrene, 1-acetylpyrene, 1-bromopyrene, 1-(bromoacetyl) pyrene, 1,2,3,6,7,8-hexa hydropyrene, 1-pyrenemethanol, 1-pyrenebutanol, 1-adamantane methanol, 1-adamantane ethanol, 1-bromo adamantane, 2-bromo adamantane, 1-iodo adamantane, 2-(1-adamantyl)-4-methyl phenol, 1-bromo-3-(bromomethyl) adamantane, 1-bromo-3,5-dimethyl adamantane, 3-(bromomethyl)-2,4,10-trioxa adamantane, 1,3-dibromoadamantane, 1,4-dibromoadamantane, dimethyl-1,3-adamantane dicarboxylate, 1-azido adamantane, 3-noradamantane carboxylic acid, 1-adamantyl bromomethyl ketone, dibenzo-24-crown-8, dibenzo-30-crown-10, dibenzofuran, dibenzosuberane, dibenzosuberenol, dibenzosuberol, dibenzosuberenone, dibenzothiophene, diphenylfulvene, 1,3-diphenyl isobenzofuran, bis(diphenylphosphino) methane, 1,2-bis(diphenylphosphino) ethane, 1,2-bis(diphenylphosphino) ethylene, 1,4-bis(diphenylphosphino) butane, 2,3-bis(diphenylphosphino) butane, 1,6-bis(diphenylphosphino) hexane, 1,1,1-tris(diphenylphosphino methyl) ethane, 1,4-bis(dicyclohexyl phosphino) butane, 1,2-bis(phenylsulfonyl) ethylene, bis(phenylsulfonyl) methane, 1-bromomethyl-2-((phenylsulfonyl) methyl) benzene, 2-(phenylsulfonyl)tetrahydropyran, or mixtures thereof.

A hot melt ink composition comprising (a) a styrene polymer or terpene polymer hardening component, (b) a nonpolymeric aromatic viscosity modifier, (c) a colorant, (d) an optional nonpolymeric aromatic ink vehicle, (e) a colorant dispersing agent, (f) an optional conductivity enhancing agent, (g) an optional antioxidant, and (h) an optional UV absorber, wherein the colorant dispersing agent is 2-hydroxyisocaproic acid, 2-hydroxy isobutyric acid, benzylmalonic acid, dibenzoyltartaric acid, methylsuccinic acid, 2-ethyl-2-methylsuccinic acid, 2,2-dimethyl glutaric acid, 3,3-dimethylglutaric acid, 1-hydroxy-1-cyclopropane carboxylic acid, 2,2,3,3-tetramethyl cyclopropane carboxylic acid, 1-benzo cyclobutane carboxylic acid, 3-oxo-1-indan carboxylic acid, 2-oxo-6-pentyl-2H-pyran-3-carboxylic acid, diphenyl carbonate, 1,2-diphenylvinylene carbonate, 2-oxazolidone, flavone, 4-methoxy chalcone, 4′-methoxy chalcone, γ-(2-naphthyl)-γ-butyrolactone, diphenyl-γ-butyrolactone, 2,6-dimethyl-4H-pyran-4-one, distyryl ketone, 4-(4-hydroxyphenyl)-2-butanone, 1,3-dacetyl-2-imidazolidinone, 2,6-diphenyl cyclohexanone, flavanone, 1-(2-hydroxyphenyl)-3-phenyl-1,3-propanedione, 1-(2-hydroxy-5-methylphenyl)-3-phenyl-1,3-propanedione, tetramethyl-1,3-cyclobutanedione, 2,5-oxazolidinedione, 5,5-dimethyloxazolidine-2,4-dione, 3,6-dimethyl-1,4-dioxane-2,5-dione, 2,2-dimethyl-1,3-dioxane-4,6-dione, 4,4-dimethyl-1,3-cyclohexanedione, benzlphenyl ketone, di-n-benzyl ketone, diphenyl acetone, poly(vinyl phenyl ketone), poly(vinyl phenyl ketone) hydrogenated, polycyclohexanone, poly(coumarone-co-indene), polycaprolactone, poly(ethelene-co-carbon monoxide), poly(1-vinylpyrollidone)-graft-(1-triacontene), 3-hydroxybenzaldehyde, 4-hydroxybenzaldehyde, 4-benzyloxybenzaldehyde, 2-carboxybenzaldehyde, 4-nitrobenzaldehyde, 2,3-dihydroxybenzaldehyde, 2,5-dihydroxybenzaldehyde, 3-hydroxy-4-methoxybenzaldehyde, 4-hydroxy-3-methoxybenzaldehyde, 4-hydroxy-3-ethoxybenzaldehyde, 4-hydroxy-3-methylbenzaldehyde, 2-hydroxy-5-nitrobenzaldehyde, 3-hydroxy-4-nitrobenzaldehyde, 4-hydroxy-3-nitrobenzaldehyde, 3,4-dibenzyloxy benzaldehyde, 3,5-dibenzyloxybenzaldehyde, 4-acetoxy-3,5-dimethoxybenzaldehyde, 2-amino-3,5-dibromobenzaldehyde, 2-benzyloxy-4,5-dimethoxybenzaldehyde, 5-bromo-2-hydroxy-3-methoxybenzaldehyde, 4-hydroxy-3,5-dimethoxybenzaldehyde, 2,3,5-trichlorobenzaldehyde, 2,3,6-trichlorobenzaldehyde, 2,4,5-trimethoxybenzaldehyde, 2,4,6-trimethoxybenzaldehyde, 3,5-dichloro-2-hydroxybenzaldehyde, 3,5-dibromo-2-hydroxybenzaldehyde, 3,5-diiodo-2-hydroxybenzoldehyde, 3,4-dihydroxy-5-methoxybenzaldehyde, 3,5-dimethyl-4-hydroxybenzaldehyde, 2,6-dimethoxybenzaldehyde, trans-2-nitro cinnamaldehyde, trans-4-(diethylamino) cinnamaldehyde, 4-acetoxy-3-methoxy cinnamaldehyde, 4-hydroxy-3-methoxy cinnamaldehyde, 2-hydroxy-1-naphthaldehyde, 2-methoxy-1-naphthaldehyde, 9-anthraldehyde, 5-bromo-2-furaldehyde, 5-nitro-2-thiophene carboxaldehyde, 9-ethyl-3-carbazole carboxaldehyde, 4-stillbenecarboxaldehyde, 2-hydroxy-5-methyl-1,3-benzene dicarboxaldehyde, terephthal dicarboxaldehyde, 2-(diphenylphosphino) benzaldehyde, 1-(phenylsulfonyl)-2-pyrrolecarboxaldehyde, 1-pyrene carboxaldehyde, phenanthrene carboxaldehyde, 2-fluorenecarboxaldehyde, poly((phenyl glycidyl ether)-co-formaldehyde), poly((o-cresyl glycidyl ether)-co-formaldehyde), poly(ρ-toluenesulfonamide-co-formaldehyde), or mixtures thereof.