Pigment compositions based on 3,6-di(biphenyl)1,4-diketo-pyrrolo[3,4c]-pyrrole

摘要

Heat-stable, red pigment compositions comprising a physical mixture of 1,4-diketo-3,6-di(4-biphenylyl)-pyrrolo [3,4 c]-pyrrole and a 2,9-dichloroquinacridone pigments, processes for preparing the pigment compositions and the use of the compositions for pigmenting high-molecular-weight organic materials are disclosed.