Are disclosed disazo compounds represented by the general formula (1):
wherein A represents a phenylene or naphthylene group which may be optionally substituted; each of R1 and R2 represent independently a hydrogen atom, an alkyl group or a phenyl group which may be optionally substituted; and m is 1 or 2.
The compounds are highly water-soluble and are stable to long term storage. Ink compositions comprising the compounds of the invention can produce a printed image with full depth of shade and are excellent in resistance to water.
公开了通式(1)所代表的二偶氮化合物:
其中 A 代表可被任选取代的亚苯基或亚
萘基;R1 和 R2 各自独立地代表氢原子、烷基或可被任选取代的苯基;m 为 1 或 2。
这些化合物具有很强的
水溶性和长期储存的稳定性。由本发明化合物组成的油墨组合物可以产生具有完整阴影深度的印刷图像,并且具有优异的耐
水性。