Patent ID: 7758685

Claim:
An ink composition comprising a colorant, a solvent, and a plurality of different additives, wherein the plurality of different additives are of the same type and have one or more hydrophilic groups and one or more hydrophobic groups; and wherein each of the one or more hydrophobic groups of the plurality of additives have the same structure and the hydrophilic groups have a different structure, each of the one or more hydrophilic groups of the plurality of additives have the same structure and the hydrophobic groups have a different structure, or each of the one or more hydrophobic groups and each of the one or more hydrophilic groups of the plurality of additives have the same structure, where the plurality of additives have the Formula II R 1 —X—R 2 , or X 1 —R—X 2 , Formula IV in which R, R 1 and R 2 are selected from the group consisting of a hydrogen atom, a substituted or unsubstituted C 5 to C 25 alkyl group, a substituted or unsubstituted C 5 to C 25 cyclic alkyl group, a substituted or unsubstituted C 5 to C 25 heteroalkyl group, a substituted or unsubstituted C 5 to C 25 alkenyl group, a substituted or unsubstituted C 5 to C 25 alkoxy group, a substituted or unsubstituted C 5 to C 25 alkylsulfonamide group, a substituted or unsubstituted C 5 to C 25 arylsulfonamide group, a substituted or unsubstituted C 5 to C 25 acylamino group, C 5 to C 25 alkylureido group, C 6 to C 26 arylureido group, C 5 to C 25 alkoxycarbonyl group, C 5 to C 25 alkoxycarbonylamino group, a carbamoyl group, a sulfamoyl group, a sulfo group or salts thereof, a carboxy group or salts thereof, a substituted or unsubstituted C 1 to C 20 hydroxyalkyloxyalkyl group, a substituted or unsubstituted C 5 to C 25 dialkylaminoalkyl group, a substituted or unsubstituted C 5 to C 25 pyridyl group, a substituted or unsubstituted C 6 to C 26 pyridylalkyl group, a substituted or unsubstituted C 6 to C 26 imidazolyl group, a hydrazine group, a hydrozone group, a substituted or unsubstituted C 5 to C 25 pyridylalkyl group, a substituted or unsubstituted C 6 to C 26 aryl group, a substituted or unsubstituted C 6 to C 26 arylalkyl group, a substituted or unsubstituted C 6 to C 26 heteroaryl group, C 6 to C 26 heteroarylalkyl group, a substituted or unsubstituted C 6 to C 26 heteroarylalkenyl group, and a substituted or unsubstituted C 5 to C 25 heterocycloalkyl group; and X, X 1 and X 2 are each independently selected from the group consisting of alkylcarboxylic acid salts, alcohol sulfonic acid ester salts, alkylsulfonic acid salts, alkylbenzenesulfonic acid salts, aliphatic amine salts, quaternary ammonium salts, sulfonium salts, phosphonium salts, hydroxides, polyglycerine fatty acid esters, sorbitan fatty acid esters, acetylenic polyalkylene oxides, and acetylenic diols.