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US 12,767,840 B2Granted
Inkjet ink
AssigneeNippon Kayaku Kabushiki Kaisha
InventorsYuri Nakagawa, Junya Masegi
Life of this patent
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Abstract
An inkjet ink containing a white pigment, a block polymer-type resin dispersant, an organic solvent, and water, in which the white pigment is titanium oxide particles in which the surface is treated with alumina, excluding particles in which the surface is treated with an organic compound, silica, zirconia, zinc oxide, or magnesium oxide, and titanium oxide particles in which the surface is treated with alumina and an organic compound.
Claims8
An inkjet ink comprising:
- a white pigment;
- a block polymer type resin dispersing agent having a mass average molecular weight of 15,000 to 25,000;
- an organic solvent;
- at least one polymer selected from the group consisting of urethane polymers and acrylic polymers;
- a polyethylene wax as a fixing resin;
- and
- water,
- wherein the white pigment is at least one type of titanium oxide particles selected from the group consisting of titanium oxide particles having surfaces treated with alumina, provided that titanium oxide particles having surfaces treated with an organic compound, silica, zirconia, zinc oxide, or magnesium oxide are excluded, and titanium oxide particles having surfaces treated with alumina and an organic compound, and
- wherein a content of the polymer is 3 to 8% by mass and a content of the polyethylene wax is 0.05 to 3% by mass.
6 more elements
Dependencies are inferred from the claim text.