PIGMENT DISPERSION LIQUID, INK JET RECORDING INK, INK JET RECORDING METHOD, INK CARTRIDGE AND INK JET RECORDING APPARATUS
申请人:Chizuwa Junko
公开号:US20090162552A1
公开(公告)日:2009-06-25
A pigment dispersion liquid capable of stably recording images having high fastness and excellent quality for a long term in any cases has been provided. A pigment dispersion liquid mainly containing a polymer dispersant, a pigment and water, wherein the polymer dispersant is a copolymer comprised of at least a hydrophobic unit and a hydrophilic unit, the hydrophobic unit has a block portion comprised of at least one hydrophobic monomer, the hydrophilic unit has at least a repeating unit structure of an acrylamide structure of the following general formula (1), and the segment number (A) of the block portion comprised of a hydrophobic monomer to the number (B) of all segments of the polymer dispersant is in a range of 0.07 to 0.85 in terms of A/B ratio.