The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 28, 2023
Filed:
Feb. 09, 2021
Canon Kabushiki Kaisha, Tokyo, JP;
Ryosuke Nagao, Kanagawa, JP;
Kenta Ohtsuka, Kanagawa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
Provided is an aqueous ink for ink jet that has excellent storage stability and whose viscosity does not easily increase even in a case where the ink is stored in a severe environment such as a high temperature condition. This aqueous ink for ink jet contains a coloring material and a block copolymer. The block copolymer includes an A block having a segment A having no acid group and a group represented by Formula (1) bonded to one terminal of the segment A, and a B block having a segment B having an acid group and a group represented by Formula (2) bonded to one terminal of the segment B. (In Formula (1), Rrepresents an alkylene group, and M represents a hydrogen atom, an alkali metal, ammonium or organic ammonium. In Formula (2), Rand Reach independently represent an alkyl group or the like.)