US 12,252,620 B2
Ink jet ink composition, ink set, and ink jet recording method
Kohei Ishida, Matsumoto (JP); Kohei Sharyo, Kyoto (JP); and Tsuyoshi Fukushima, Kyoto (JP)
Assigned to SEIKO EPSON CORPORATION, (JP)
Filed by Seiko Epson Corporation, Tokyo (JP)
Filed on Mar. 26, 2021, as Appl. No. 17/213,296.
Claims priority of application No. 2020-057355 (JP), filed on Mar. 27, 2020.
Prior Publication US 2021/0301160 A1, Sep. 30, 2021
Int. Cl. C09D 11/102 (2014.01); B41J 2/21 (2006.01); C08G 18/12 (2006.01); C08G 18/32 (2006.01); C08G 18/40 (2006.01); C08G 18/42 (2006.01); C08G 18/62 (2006.01); C08G 18/75 (2006.01); C08K 5/053 (2006.01); C08K 5/06 (2006.01); C08K 5/20 (2006.01); C08L 75/06 (2006.01); C08L 83/04 (2006.01); C08L 91/06 (2006.01); C09D 11/033 (2014.01); C09D 11/037 (2014.01); C09D 11/40 (2014.01)
CPC C09D 11/102 (2013.01) [B41J 2/2107 (2013.01); C08G 18/12 (2013.01); C08G 18/3206 (2013.01); C08G 18/4063 (2013.01); C08G 18/4213 (2013.01); C08G 18/6204 (2013.01); C08G 18/755 (2013.01); C08K 5/053 (2013.01); C08K 5/06 (2013.01); C08K 5/20 (2013.01); C08L 75/06 (2013.01); C08L 83/04 (2013.01); C08L 91/06 (2013.01); C09D 11/033 (2013.01); C09D 11/037 (2013.01); C09D 11/40 (2013.01); C08L 2201/54 (2013.01)] 11 Claims
OG exemplary drawing
 
1. 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):

OG Complex Work Unit Chemistry
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;

OG Complex Work Unit Chemistry
where, in Formula (2), R3 represents a hydrogen atom or a methyl group;

OG Complex Work Unit Chemistry
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.