| abstract |
A diketopyrrolo-pyrrole compound according to Formula (I): Formula (I) wherein R1, R2 and R3 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; R4 , R5and R6 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 R7 and R8 is a group comprising two acid functions while the other one of R7 and R8 represents hydrogen. Pigment dispersions, methods for forming pigment dispersions and use of the diketopyrrolo-pyrrole compound according to Formula (I) are also disclosed. |