Pigment dispersing agents on the basis of diketopyrrolopyrrole compounds and pigment preparations

摘要

The present invention relates to novel pigment dispersing agents of the formula (i) dollar f1 wherein q of the radical of the formula (ia), dollar f2 s is a number of from 0,1 to 4,0 and dollars a n is a number from 0 to 2,0; dollars a as well as pigment preparations comprising an organic base pigment and a pigment dispersant of the formula (i).