PIGMENT COMPOSITIONS BASED ON 3,6-DI(4-BIPHENYL)-1,4-DIKETO-PYRROLO [3,4 C]-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 highmolecular-weight organic materials are disclosed.