Patent ID: 8188179

Claim:
An ink-jet recording pigment ink comprising: water; a pigment; a water-soluble organic solvent; and a copolymer, wherein the copolymer is a copolymer obtained by copolymerizing a silicone type macromer having a vinyl group, represented by the following Formula (1), a vinyl monomer having a hydrocarbon group having 1 to 7 carbon atoms, represented by the following Formula (2), and a monomer having an anionic functional group: wherein X represents a single bond or an ester group, R 1 represents a hydrogen atom or a methyl group, R 2 represents a single bond or an alkylene group having 1 to 4 carbon atoms, R 3 to R 6 each independently represent an alkyl group having 1 to 4 carbon atoms, R 7 represents a hydrocarbon group which may have a hetero atom, and n represents an integer of 8 or more, and wherein Y represents a single bond, an ester group or an amide group, R 8 represents a hydrogen atom or a methyl group, and R 9 represents a hydrocarbon group having 1 to 7 carbon atoms.