US 12,319,822 B2
Ink jet composition and ink jet recording method
Koichi Terao, Suwa (JP); Soichi Yamazaki, Shiojiri (JP); Nikako Tsukiji, Matsumoto (JP); Harunobu Komatsu, Matsumoto (JP); and Koji Horiba, Atsugi (JP)
Assigned to SEIKO EPSON CORPORATION, (JP)
Filed by SEIKO EPSON CORPORATION, Tokyo (JP)
Filed on Aug. 11, 2022, as Appl. No. 17/885,715.
Claims priority of application No. 2021-131781 (JP), filed on Aug. 12, 2021.
Prior Publication US 2023/0051678 A1, Feb. 16, 2023
Int. Cl. C09D 11/328 (2014.01); B41J 2/01 (2006.01); C09D 167/00 (2006.01)
CPC C09D 11/328 (2013.01) [B41J 2/01 (2013.01); C09D 167/00 (2013.01)] 12 Claims
OG exemplary drawing
 
1. An ink jet composition comprising:
water;
a polyester resin having sulfo groups;
a colorant; and
a high molecular weight dispersant having anionic groups,
wherein the colorant is contained in particles formed from a material containing the polyester resin, and
a rate X1 [percent on molar basis] of the sulfo groups to all constituent monomers of the polyester resin is lower than a rate X2 [percent on molar basis] of the anionic groups to all constituent monomers of the high molecular weight dispersant.