Canon Kabushiki Kaisha

Otome Mori

Daiji Okamura

Hiroshi Tomioka

Satoshi Kudo

Hideki Yamakami

Mitsuru Ishii

Takeshi Miyazaki

Masashi Hirose

Yasuaki Murai

Minako Kawabe

Kei Inoue

Jun Yoshizawa

Kuniaki Fujimoto

Kaoru Takahashi

Yojiro Kojima

Ryosuke Nagao

The present invention is a colorant compound represented by the following general formula (1): wherein at least one of R, R, Rand Ris an acylamino group represented by the following general formula (2): wherein Rdenotes one of an alkyl group, a cycloalkyl group, an aryl group, an arylalkyl group, an alkenyl group and a heterocyclic group; and '*' denotes a bonding site with an aromatic ring of the general formula (1).

Colorant compound

An ink jet ink providing an image having excellent lightfastness and having sticking resistance and intermittent ejection stability. The ink jet ink is characterized by containing at least a compound represented by the following general formula (I) and a compound represented by the following general formula (II). 

Ink jet ink, ink jet recording method, ink cartridge, recording unit and ink jet recording apparatus

The present invention provides an ink jet ink, which gives a superior lightfastness to an ink image, has a superior sticking resistance and intermittent ejection stability, and gives a preferable color tone to the image. The ink includes an azo-based dye represented by formula (I) and a water-soluble organic solvent represented by bis(2-hydroxyethyl)sulfone represented by formula (II). 

Ink jet ink, ink jet recording method, ink cartridge, recording unit, and ink jet recording apparatus

An ink containing at least two coloring materials of a first coloring material and a second coloring material, wherein the first coloring material is a compound represented by the general formula (I), and the second coloring material is a compound represented by the general formula (II): 

Ink, ink jet recording method, ink cartridge, recording unit and ink jet recording apparatus

Growing community of inventors

Yokohama, Japan

Otome Mori