	US 12,077,671 B2
	Ink jet ink composition and recording method
Yasuhiro Oki, Matsumoto (JP); Daisuke Sakuma, Minowa (JP); Hidehiko Komatsu, Chino (JP); and Shintaro Hama, Matsumoto (JP)
Assigned to SEIKO EPSON CORPORATION, (JP)
Filed by Seiko Epson Corporation, Toyko (JP)
Filed on Mar. 29, 2021, as Appl. No. 17/215,285.
Claims priority of application No. 2020-060116 (JP), filed on Mar. 30, 2020.
Prior Publication US 2021/0301155 A1, Sep. 30, 2021
Int. Cl. C09D 11/033 (2014.01); C08K 5/053 (2006.01); C08K 5/06 (2006.01); C08K 5/3415 (2006.01); C09D 11/328 (2014.01)

CPC C09D 11/033 (2013.01) [C08K 5/053 (2013.01); C08K 5/06 (2013.01); C08K 5/3415 (2013.01); C09D 11/328 (2013.01)]

7 Claims

1. An ink jet ink composition containing a color material, an organic solvent, and water,

wherein the ink jet ink composition contains N-hydroxyethylpyrrolidone and N-vinyl-2-pyrrolidone as the organic solvent;

a content of the water is 40 mass % or more;

a content of the N-vinyl-2-pyrrolidone is 0.0001 mass % or more and 0.05 mass % or less; and

a ratio of a content of the N-hydroxyethylpyrrolidone to the content of the N-vinyl-2-pyrrolidone, (content of N-hydroxyethylpyrrolidone)/(content of N-vinyl-2-pyrrolidone), is 500 or more and 10000 or less on a mass basis.