US 12,234,363 B2
Aqueous ink, ink cartridge and ink jet recording method
Katsuhiro Hayashi, Kanagawa (JP); Tsuyoshi Furuse, Kanagawa (JP); and Masahito Miyabe, Kanagawa (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Mar. 17, 2021, as Appl. No. 17/203,891.
Claims priority of application No. 2020-049697 (JP), filed on Mar. 19, 2020; application No. 2020-049698 (JP), filed on Mar. 19, 2020; application No. 2020-049699 (JP), filed on Mar. 19, 2020; and application No. 2021-023121 (JP), filed on Feb. 17, 2021.
Prior Publication US 2021/0292577 A1, Sep. 23, 2021
Int. Cl. C09D 11/033 (2014.01); B41J 2/175 (2006.01); C09D 11/037 (2014.01); C09D 11/104 (2014.01)
CPC C09D 11/033 (2013.01) [B41J 2/17503 (2013.01); C09D 11/037 (2013.01); C09D 11/104 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An aqueous ink for ink jet comprising a coloring material and a plurality of resins different from the coloring material,
wherein the plurality of resins includes a first resin and a second resin,
wherein the coloring material is dispersed by a resin dispersant other than the first resin and the second resin,
wherein the first resin is a resin particle formed of a first polyester resin not having a sulfonic acid group and including a unit derived from a polyhydric alcohol and a unit derived from a polycarboxylic acid, and
wherein the second resin is a water-soluble resin that is present in the aqueous ink in a dissolved state, and wherein the second resin is a block copolymer containing an A block having no acid group and a B block having an acid group.