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US 12,674,067 B2Granted
Inkjet ink and inkjet recording apparatus
AssigneeKYOCERA Document Solutions Inc.
InventorNoriaki Ozawa
Life of this patent
Estimating the term…
Abstract
An inkjet ink contains a quinacridone pigment, a resin, and an aqueous medium. A ratio of a mass of the resin to a mass of the quinacridone pigment is no greater than 0.50. The resin has an acid value of at least 60 mgKOH/g and no greater than 120 mgKOH/g. A supernatant has a phosphorus concentration of no greater than 2.0 ppm. The supernatant is obtained by centrifugation of the inkjet ink at 1,050,000 G for 3 hours.
Claims6
An inkjet ink comprising:
- a quinacridone pigment;
- a resin;
- and
- an aqueous medium, wherein
- a ratio of a mass of the resin to a mass of the quinacridone pigment is no greater than 0.50,
- the resin has an acid value of at least 60 mgKOH/g and no greater than 120 mgKOH/g,
- a supernatant has a phosphorus concentration of no greater than 2.0 ppm, the supernatant being obtained by centrifugation of the inkjet ink at 1,050,000 G for 3 hours, and
- the resin includes at least one repeating unit derived from (meth)acrylic acid, at least one repeating unit derived from alkyl (meth)acrylate, and a repeating unit derived from styrene selected from styrene, a-methylstyrene, and vinyltoluene.
5 more elements
Dependencies are inferred from the claim text.