US 12,473,441 B2
Ink jet ink composition and recording method
Shunsuke Uchizono, Shiojiri (JP); Hiroaki Kumeta, Matsumoto (JP); Soichi Yamazaki, Shiojiri (JP); and Manabu Taniguchi, Shiojiri (JP)
Assigned to SEIKO EPSON CORPORATION, (JP)
Filed by Seiko Epson Corporation, Tokyo (JP)
Filed on Mar. 22, 2022, as Appl. No. 17/700,596.
Claims priority of application No. 2021-048962 (JP), filed on Mar. 23, 2021.
Prior Publication US 2022/0315777 A1, Oct. 6, 2022
Int. Cl. C09D 11/00 (2014.01); B41J 2/01 (2006.01); C08K 3/36 (2006.01); C08K 5/3415 (2006.01); C09D 11/033 (2014.01); C09D 11/037 (2014.01)
CPC C09D 11/037 (2013.01) [B41J 2/01 (2013.01); C08K 3/36 (2013.01); C08K 5/3415 (2013.01); C09D 11/033 (2013.01); C08K 2201/003 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An ink jet ink composition comprising:
a colorant;
silica particles;
1-(2-hydroxyethyl)-2-pyrrolidone;
a betaine; and
water,
wherein the silica particles have in a TEM image thereof, a Di (diameter of the maximum inscribed circle)/Dc (diameter of the minimum circumscribed circle) of 0.7 or more, and
wherein the silica particles have an average particle diameter of 45 to 80 nm.