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. 08, 2011
Filed:
Nov. 25, 2008
Koji Hirota, Tokyo, JP;
Takahiko Matsui, Tokyo, JP;
Takashi Yoshimoto, Tokyo, JP;
Shinsuke Shimizu, Tokyo, JP;
Koji Hirota, Tokyo, JP;
Takahiko Matsui, Tokyo, JP;
Takashi Yoshimoto, Tokyo, JP;
Shinsuke Shimizu, Tokyo, JP;
Nippon Kayaku Kabushiki Kaisha, Tokyo, JP;
Abstract
The present invention relates to a trisazo compound represented by the following formula (1): wherein, n represents 0 or 1, the group A represents a substituted heterocyclic group, Rrepresents a C1-C4 alkyl group which may be substituted or the like, Rrepresents a cyano group or the like, Rand Reach independently represent a hydrogen atom, a sulfo group or the like, Rto Reach independently represent a hydrogen atom, a C1-C4 alkyl group which may be substituted, a C1-C4 alkoxy group which may be substituted or the like, respectively or salt thereof. Said trisazo compound or salt thereof provides a coloring matter compound for black ink and an ink composition thereof where they have high solubility in medium where water is a principal component, their aqueous solution and ink having high concentration is stable even when stored for a long period of time, printed images therewith have very high density, no bronzing is caused on the images printed even with their high concentration solution, and they give black recorded images excellent in fastness, particularly in both light fastness and ozone gas fastness.