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US 2024/0174873 A1Published application
Inkjet ink and injket ink production method
AssigneeKYOCERA Document Solutions Inc.
InventorSeishi OJIMA
Life of this patent
Estimating the term…
Abstract
An inkjet ink contains pigment particles and an aqueous medium. The pigment particles contain a pigment and a resin. The resin has a mass ratio to the pigment in the pigment particles of at least 1.40 and no greater than 3.10. The resin includes a polyester resin. The inkjet ink does not contain free resin dispersed in the aqueous medium or contains the free resin at a rate to the total amount of the free resin and the resin contained in the pigment particles of greater than 0.00% by mass and no greater than 3.00% by mass.
Claims6
An inkjet ink comprising:
- pigment particles;
- and
- an aqueous medium, wherein
- the pigment particles contain a pigment and a resin,
- the resin has a mass ratio to the pigment in the pigment particles of at least 1.40 and no greater than 3.10,
- the resin includes a polyester resin,
- the inkjet ink does not contain free resin dispersed in the aqueous medium or contains the free resin at a rate to a total amount of the free resin and the resin contained in the pigment particles of greater than 0.00% by mass and no greater than 3.00% by mass.
4 more elements
An inkjet ink production method comprising:
- mixing and kneading a pigment and a resin to obtain a kneaded product;
- pulverizing the kneaded product to obtain a kneaded and pulverized product;
- performing high-pressure emulsification treatment on the kneaded and pulverized product to obtain a dispersion;
- centrifugating the dispersion to obtain a precipitate;
- and
- dispersing the precipitate in an aqueous medium to obtain a pigment particle dispersion containing pigment particles, wherein
- the resin includes a polyester resin, and
- the resin has a mass ratio to the pigment in the pigment particles of at least 1.40 and no greater than 3.10.
5 more elements
Dependencies are inferred from the claim text.