| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for producing a dispersion of water-insoluble vinyl polymer particles containing a hydrophobic dye, which is used for a water-based ink for ink jet recording and has a good printing property and storage stability. <P>SOLUTION: The method for producing a dispersion of water-insoluble vinyl polymer particles containing a hydrophobic dye for ink jet printing is a method for producing a dispersion of water-insoluble vinyl polymer particles, which comprises the steps of adding water and a neutralizer to a mixed solution containing a hydrophobic dye, a water-insoluble vinyl polymer having a salt-forming group with an acid value of between 70 and 130, and an organic solvent and neutralizing the above water-insoluble vinyl polymer having the salt-forming group, wherein the concentration of a neutralizer in the total water content within the system is maintained at a prescribed level of 0.3 or less upon neutralization. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
