Inkjet ink
AssigneeKYOCERA Document Solutions Inc.
InventorRyotaro Komada
Life of this patent
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Abstract
Composite particles contained in an ink are particles of a composite of a polyester resin including a sulfonic acid group and a basic dye. The polyester resin has a glass transition point of 40° C. to 70° C. The polyester resin includes a first repeating unit derived from a polyvalent carboxylic acid having the sulfonic acid group, a second repeating unit derived from a polyvalent carboxylic acid having no sulfonic acid group, and a third repeating unit derived from a polyhydric alcohol. The content ratio of the first repeating unit relative to the total amount of the first repeating unit and the second repeating unit is at least 1.5 mol % and no greater than 20.0 mol %. The mass ratio of the polyester resin to the basic dye is at least 1.0 and no greater than 10.0.
Claims2
An inkjet ink comprising:
- an aqueous medium;
- and
- composite particles, wherein
- the composite particles are particles of a composite of a polyester resin having a sulfonic acid group and a basic dye,
- the polyester resin has a glass transition point of 40° C. or higher and 70° C. or lower,
- the polyester resin includes:
- a first repeating unit derived from a polyvalent carboxylic acid having the sulfonic acid group;
- a second repeating unit derived from a polyvalent carboxylic acid having no sulfonic acid group;
- and
- a third repeating unit derived from a polyhydric alcohol,
- the polyester resin has a content ratio of the first repeating unit relative to a total amount of the first repeating unit and the second repeating unit of at least 1.5 mol % and no greater than 20.0 mol %,
- the second repeating unit includes a repeating unit derived from terephthalic acid, a repeating unit derived from isophthalic acid, and a repeating unit derived from naphthalenedicarboxylic acid,
- a content ratio of the repeating unit derived from naphthalenedicarboxylic acid relative to the total amount of the first repeating unit and the second repeating unit is greater than 0.0 mol % and no greater than 10.0 mol %, and
- a mass ratio of the polyester resin to the basic dye is at least 1.0 and no greater than 10.0.
An inkjet ink comprising:
- an aqueous medium;
- and
- composite particles, wherein
- the composite particles are particles of a composite of a polyester resin having a sulfonic acid group and a basic dye,
- the polyester resin has a glass transition point of 40° C. or higher and 70° C. or lower,
- the polyester resin includes:
- a first repeating unit derived from a polyvalent carboxylic acid having the sulfonic acid group;
- a second repeating unit derived from a polyvalent carboxylic acid having no sulfonic acid group;
- and
- a third repeating unit derived from a polyhydric alcohol,
- the polyester resin has a content ratio of the first repeating unit relative to a total amount of the first repeating unit and the second repeating unit of at least 1.5 mol % and no greater than 20.0 mol %,
- a mass ratio of the polyester resin to the basic dye is at least 1.0 and no greater than 10.0,
- the inkjet ink further comprising a first additive that is a compound reactive with at least one of a hydroxyl group, a carboxy group, and an amino group by heating, and
- the first additive is a blocked isocyanate, a polymer having an oxazoline group, a polycarbodiimide, or a compound having an epoxy group.
Dependencies are inferred from the claim text.