Dispersion, ink composition for ink jet recording, and ink jet recording method
View Patent ↗A dispersion contains: a water-insoluble colorant; and acrylic resin particles, where: the acrylic resin particles contain, as a monomer unit, 20 mol % or more of an acrylic blocked isocyanate group based on a total amount of the acrylic resin particles; and the acrylic resin particles have a weight-average molecular weight of 1,000 or more and 1,000,000 or less.
1. A dispersion comprising:
a water-insoluble colorant; and
acrylic resin particles, wherein:
the acrylic resin particles contain, as a monomer unit, 20 mol % or more of an acrylic blocked isocyanate group based on a total amount of the acrylic resin particles; and
the acrylic resin particles have a weight-average molecular weight of 700,000 or more and 1,000,000 or less.
2. The dispersion according to claim 1 , wherein
a blocking agent of the acrylic blocked isocyanate group is any of pyrazole, methyl ethyl ketoxime, and caprolactam.
3. The dispersion according to claim 1 , wherein
the acrylic resin particles have a structure derived from a hydroxyalkyl acrylate in repeating units.
4. The dispersion according to claim 1 , wherein
a content of the acrylic resin particles is 1% by mass or more and 50% by mass or less based on a total amount of the dispersion.
5. The dispersion according to claim 1 , further comprising a dispersant for the colorant.
6. An ink composition for ink jet recording, comprising the dispersion according to claim 1 .
7. An ink jet recording method comprising
an ink attaching step of discharging the ink composition for ink jet recording according to claim 6 from a recording head, thereby attaching to a recording medium.
8. The ink jet recording method according to claim 7 , wherein
the recording medium has hydroxy groups on a surface.
9. The ink jet recording method according to claim 8 , further comprising, after the ink attaching step,
a heating step of heating the recording medium and the ink composition for ink jet recording attached to the recording medium to a heating temperature equal to or higher than a thermal dissociation temperature of the acrylic blocked isocyanate group.
10. The ink jet recording method according to claim 8 , wherein
in the ink attaching step, the recording medium and the ink composition for ink jet recording attached to the recording medium are heated to a heating temperature equal to or higher than a thermal dissociation temperature of the acrylic blocked isocyanate group.
11. The ink jet recording method according to claim 9 , wherein
the heating temperature is 100° C. or higher.