申请人:Jaunky Wojciech
公开号:US20080207806A1
公开(公告)日:2008-08-28
A pigment dispersion comprising a colour pigment represented by formula (I)
wherein,
R1 is selected from the group consisting of hydrogen, a halogen atom, a methyl group, an ethyl group, a methoxy group, an ethoxy group, —CF
3
, —COOH, —COOCH
3
and
R2, R4 and R5 are independently selected from the group consisting of hydrogen, a halogen atom, a methyl group, an ethyl group, a methoxy group, an ethoxy group, —CF
3
, —COOH and —COOCH
3
;
R3 is selected from the group consisting of hydrogen, a halogen atom, a methyl group, an ethyl group, a methoxy group, an ethoxy group, —CF
3
, —COOH, —COOCH
3
, —SO
2
NH—C
6
H
5
, —CONH—C
6
H
5
, —CONH—C
6
H
5
—CONH
2
and —CONH
2
;
R6 and R7 are independently selected from the group consisting of hydrogen, a halogen atom, a methyl group, an ethyl group, a methoxy group, an ethoxy group, —CF
3
, —COOH and —COOCH
3
, or R6 and R7 represent the necessary atoms to form an imidazolone ring;
and a polymeric dispersant having via a linking group covalently linked to its polymeric backbone at least one pending chromophore group which has a molecular weight smaller than 95% of the molecular weight of said colour pigment.
The pigment dispersion can be advantageously used in inkjet inks.