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AssigneeCanon Kabushiki Kaisha
InventorsMasayuki Ikegami, Koichi Sato, Ikuo Nakazawa, Sakae Suda
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The present invention provides an ink composition containing a pigment dispersed uniformly in a solvent and a block polymer having an ionic functional group, an image-forming method and an image-forming apparatus employing the ink composition. The composition comprises a pigment, a solvent and a polymer having an ionic functional group, an acid residue, or a base residue at the terminal. The polymer having an ionic functional group, an acid residue, or a base residue at the terminal is a block polymer of ABX type having A, B, and X segments, wherein A and B are respectively a block segment having a vinyl ether structure as the repeating unit, and X is a terminal segment having an ionic functional group, an acid residue, or an base residue.
A composition containing a polymer having an ionic functional group, comprising a particulate substance, a solvent, and a polymer having at least one selected from the group consisting of an ionic functional group, an acid residue and a base residue at the terminal.
A block polymer containing segments of A, B, and Y, where A and B are block segments having a vinyl ether structure as the repeating unit, and Y is a terminal segment represented by the following General Formula (4):
Dependencies are inferred from the claim text.