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US 10,570,302 B2Granted
Aqueous ink and aqueous dye dispersion for aqueous ink
AssigneeSanyo Color Works, Ltd.
InventorsKosuke Tange, Toshiaki Makino
Life of this patent
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Abstract
An aqueous dye dispersion for an aqueous ink including a dye derivative as indicated at Formula (1) below; a water-insoluble dye; a dispersant; and water, makes it possible to provide an aqueous dye dispersion for aqueous ink, which reduces flocculation of particles within aqueous ink even when the aqueous ink is prepared, and has satisfactory dispersion stability during storage, thereby providing an aqueous ink having satisfactory dispersion stability during storage.
Claims6
An aqueous dye dispersion for an aqueous ink, comprising:
- a dye derivative as indicated at Formula (1) below;
- a water-insoluble dye;
- a dispersant;
- and
- water;
- wherein Formula (1) is given by
- wherein, at Formula (1),
- R1 is a group as indicated at Formula (2) below;
- R2 is a group as indicated at Formula (3) below;
- m and n are each 0 or 1 but m+n=1;
- R3 is at least one species selected from among a hydroxyl group and an amino group;
- l is 0 to 2;
- and
- when l=2, R3 is respectively the same or different;
- wherein Formula (2) is given by
- wherein Formula (3) is given by
- wherein, at Formula (3),
- R4 is a phenylene group or an alkylene group having 1 to 4 carbons;
- and
- R5 and R6 are independently selected alkyl groups having 1 to 4 carbons.
17 more elements
Dependencies are inferred from the claim text.