AQUEOUS PIGMENT DISPERSION LIQUID AND AQUEOUS PIGMENT INKJET INK USING SAME

摘要

The present invention is an aqueous pigment dispersion liquid for inkjet comprising a pigment and a pigment dispersant. The pigment dispersant is at least any one of a graft copolymer and a block copolymer each comprising a polymer chain A and a polymer chain B, wherein the polymer chain A comprises 20 to 60 mass% of a constituent unit derived from a first cycloalkyl group-containing (meth)acrylate, 10 to 35 mass% of a constituent unit derived from (meth)acrylic acid, and 5 to 70 mass% of a constituent unit derived from another (meth) acrylate and the polymer chain B comprises at least any one of a constituent unit derived from a second cycloalkyl group-containing (meth)acrylate and a constituent unit derived from a vinyl monomer or (meth) acrylate having an aromatic ring.