申请人:NIPPON KAYAKU KABUSHIKI KAISHA
公开号:EP1889882A1
公开(公告)日:2008-02-20
The present invention relates to an azo compound represented by the following formula (1)
[KA 1]
(wherein, each of R1 and R2 independently represents a hydrogen atom, a halogen atom, a cyano group, a carboxyl group, a sulfo group, a sulfamoyl group or the like, each of m and n independently represents 0 or 1, X represents a sulfo group, B represents a substituted p-phenylene group or a substituted p-naphthylene group (these may be substituted by a group selected from the group consisting of a sulfo group, a sulfo C1 to C4 alkoxy group, a C1 to C4 alkyl group and the like), and C represents a substituted phenyl group or a naphthyl group)
or a salt thereof, an ink composition containing it, especially a black ink composition. Said pentakis-azo compound is excellent in solubility to medium whose main component is water and suitable for an water-soluble composition (ink composition and the like) for inkjet recording and writing tools; recorded articles recorded using said composition are excellent in fastnesses such as light fastness and ozone gas fastness; bronzing is not generated on the recorded images; and its recording liquids are good in storage stability.
本发明涉及一种偶氮化合物,由以下式(1)[KA1]表示(其中,R1和R2各自独立地表示氢原子,卤素原子,氰基,羧基,磺酰基,磺酰胺基或类似物,m和n各自独立地表示0或1,X表示磺酰基,B表示取代的对苯撑基或取代的对萘撑基(这些可以被从磺酰基,磺酰C1到C4烷氧基,C1到C4烷基等组成的群体中选择的群体取代),C表示取代的苯基或萘基)或其盐,以及包含它的墨水组成物,特别是黑色墨水组成物。所述五聚偶氮化合物在主要成分为水的介质中具有良好的溶解性,并适用于水溶性组合物(墨水组成物等)用于喷墨记录和书写工具;使用该组成物记录的文章在光牢度和臭氧气体牢度等方面具有优异性;记录图像上不会产生青铜色;其记录液在储存稳定性方面表现良好。