Ink jet ink composition, ink set, and ink jet recording method
AssigneeSeiko Epson Corporation
InventorsKohei Ishida, Kohei Sharyo, Tsuyoshi Fukushima
Life of this patent
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Abstract
An ink jet ink composition which is an aqueous ink includes a resin dispersion, in which the resin dispersion is a polyurethane resin dispersion formed of a polyurethane resin (U) obtained by reacting an active hydrogen atom-containing component (A) containing a high-molecular-weight polyol component (a1) having a number-average molecular weight of 500 or more and an organic polyisocyanate component (B), and the high-molecular-weight polyol component (a1) includes a polyolefin polyol (a11) having a constituent unit represented by General Formula (1) and/or a constituent unit represented by General Formula (2), and a polyester polyol (a12) having a constituent unit represented by General Formula (3).
Claims11
An ink jet ink composition which is an aqueous ink comprising:
- a resin dispersion, wherein
- the resin dispersion is a polyurethane resin dispersion formed of a polyurethane resin (U) obtained by reacting an active hydrogen atom-containing component (A) containing a high-molecular-weight polyol component (a1) having a number-average molecular weight of 500 or more and an organic polyisocyanate component (B), and
- the high-molecular-weight polyol component (a1) includes a polyolefin polyol (a11) having a constituent unit represented by General Formula (1) and/or a constituent unit represented by General Formula (2), and a polyester polyol (a12) having a constituent unit represented by General Formula (3):
- where, in Formula (1), R1 represents a hydrogen atom, a methyl group, an ethyl group, a vinyl group, an isopropyl group, or an isopropenyl group and R2 represents a hydrogen atom or a methyl group;
- where, in Formula (2), R3 represents a hydrogen atom or a methyl group;
- a total mass of the constituent unit represented by General Formula (1) and the constituent unit represented by General Formula (2) of the polyurethane resin (U) is, based on a total mass of the polyurethane resin (U), 11% by mass to 55% by mass, and
- a mass of the constituent unit represented by General Formula (3) of the polyurethane resin (U) is, based on the total mass of the polyurethane resin (U), 4% by mass to 30% by mass.
Dependencies are inferred from the claim text.