Isoindoline pigment having improved low shear dispersibility

摘要

A pigment composition, which comprises 70-95% by weight of a pigment of formula 5-15% by weight of at least one C2-C16alkylenedicarboxylic acid-di-C1-C12alkyl ester; and 0-15% by weight of at least one C12-C24fatty acid ester of polyhydroxy-C2-C12alkane; each based on the total weight of the pigment composition. Also claimed is a process for the preparation of this pigment composition and its use for mass-colouring in particular high molecular weight organic materials which can be moulded as plastics or melts. The products obtained are distinguished by an improved low shear dispersibility effect at high tinctorial strength.