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:
Nov. 17, 2020
Filed:
Dec. 12, 2017
Canon Kabushiki Kaisha, Tokyo, JP;
Akihiro Taya, Yokohama, JP;
Masahiro Terada, Hadano, JP;
Hidetaka Kawamura, Yokohama, JP;
Yohei Masada, Tokyo, JP;
Masanobu Ootsuka, Tokyo, JP;
Takaharu Aotani, Tokyo, JP;
Yutaka Yoshimasa, Yokohama, JP;
Shoji Koike, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An aqueous ink for ink jet includes a coloring material, a solvent, and a surfactant having an HLB value of 9.0 or less. The solvent includes a solvent A having a solubility in water at 20° C. of 5.00 g/100 g-HO or less and a solvent B other than the solvent A. The solvent A includes an alcohol having a vapor pressure at 20° C. of 0.5 mmHg or less and a surface tension of 30.0 mN/m or more. The content of the alcohol in the aqueous ink is 0.7 or more times the solubility in water at 20° C. in an equal amount to the aqueous ink. The solvent B has a partition coefficient (P) satisfying the following equation (1).1.44 Log−0.1−3.4≤Log≤−0.6  (1)