申请人:Nipponkayaku Kabushikikaisha
公开号:EP1975205A1
公开(公告)日:2008-10-01
The present invention relates to a trisazo compound represented by the following formula (1) or a salt thereof,
(wherein, the group A is a substituted phenyl group, the group B and the group C are substituted para-phenylene groups, R1 represents a C1 to C4 alkyl group (which may be substituted by a carboxy group), a phenyl group (which may be substituted by a sulfo group), or a carboxy group,
R2 represents a cyano group, a carbamoyl group or a carboxy group, each of R3 and R4 independently represents a hydrogen atom, a methyl group, a chlorine atom or a sulfo group, respectively) and a water-based black ink composition containing said compound; said compound has high solubility in a medium where the main component is water, its aqueous solution having a high concentration and ink are stable when stored for a long period of time, black-recorded images with it can be provided where both light fastness and ozone gas fastness of the printed images are excellent.
本发明涉及下式(1)所代表的三唑类化合物或其盐、
(其中,基团 A 是取代的苯基,基团 B 和基团 C 是取代的对位苯基,R1 代表 C1 至 C4 烷基(可被羧基取代)、苯基(可被磺基取代)或羧基、
R2 代表氰基、氨基甲酰基或羧基,R3 和 R4 分别独立地代表氢原子、甲基、氯原子或磺基)以及含有所述化合物的水性黑色油墨组合物;所述化合物在以水为主要成分的介质中具有高溶解性,其高浓度水溶液和油墨在长期储存时保持稳定,使用该化合物可提供耐光性和耐臭氧气体性都很好的黑色记录图像。