C.I. Pigment Yellow 180, aqueous pigment dispersion for ink jet ink and aqueous pigment ink

摘要

The problem of the present invention is to provide an ij ink aqueous pigment dispersion suitable for use in ij water-based pigment ink applications.The present invention provides an aqueous pigment dispersion for an ink jet ink containing C.I. Pigment Yellow 180, a block copolymer having an acid value of 10 to 20 and less than 20, and water.AndThe present invention relates toAspect ratios 1.0 to 2.0The primary particle diameter is 30 toCuk α Diffraction angles measured by lines θ In powder X-ray diffraction indicated by the diffraction intensity to2 θ＝ From the half value width of peak a showing the maximum diffraction intensity within 6.7 ± 0.5 °, the crystallite diameter calculated by schler's equation is 15.0nm or more.C. I. pigment yellow 180.