申请人:Deroover Geert
公开号:US20080308005A1
公开(公告)日:2008-12-18
A non-aqueous pigment dispersion comprising a diketopyrrolo-pyrrole pigment, a polymeric dispersant and a dispersion synergist in a non-aqueous dispersion medium characterized in that said dispersion synergist is a diketopyrrolo-pyrrole derivative according to Formula (I):
wherein
R
1
, R
2
and R
3
are independently selected from the group consisting of hydrogen, a halogen atom, a methyl group, an ethyl group, an tert.-butyl group, a phenyl group, a cyano group and an acid group;
R
4
, R
5
and R
6
are independently selected from the group consisting of hydrogen, a halogen atom, a methyl group, an ethyl group, an tert.-butyl group, a phenyl group and a cyano group; and
characterized in that one of R
7
and R
8
is a group comprising two acid functions while the other one of R
7
and R
8
represents hydrogen.