DIKETOPYRROLO-PYRROLE COMPOUNDS

摘要

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.