A dispersant for an organic pigment contains a compound represented by the following formula (1):
wherein R1 and R2 may be the same or different and each independently represents a hydrogen atom, a halogen atom, a hydroxyl group, a primary, secondary or tertiary amino group, an alkyl group, a substituted or unsubstituted aryl group or a substituted or unsubstituted phthalimidomethyl group, R3 and R4 may be the same or different and each independently represents a hydrogen atom or a lower alkyl group, and n means an average number of introduced sulfonic groups and stands for a number of from 0.5 to 3; or at least one salt selected from the group consisting of its metal salt, ammonium salt, organic amine salt, and organic quaternary ammonium salt. Also disclosed are a readily-dispersing pigment composition, a pigment dispersion, a colored coating fluid for color filters, a fabrication process of a color filter and a color filter, all of which make use of the dispersant.
一种用于
有机颜料的分散剂含有下式(1)所代表的化合物:
其中 R1 和 R2 可以相同或不同,且各自独立地代表氢原子、卤素原子、羟基、伯
氨基、仲
氨基或叔
氨基、烷基、取代或未取代的芳基或取代或未取代的邻苯二甲
酰亚胺基;R3 和 R4 可以相同或不同,且各自独立地代表氢原子或低级烷基;n 表示引入的
磺酸基团的平均数目,代表从 0.5至3;或至少一种选自其
金属盐、
铵盐、有机胺盐和有机季
铵盐组成的组的盐。此外,还公开了一种易于分散的
颜料组合物、一种
颜料分散体、一种用于彩色滤光片的彩色涂层液、一种彩色滤光片的制造工艺和一种彩色滤光片,所有这些都使用了该分散剂。