A process for preparing a pigment composition for coloring high molecular materials or termoplas pso-ticos.

摘要

An improved flush process for the production of a colorant composition, which involves mixing a colorant in the presence of water with the organic carrier material in a kneader at a temperature sufficient to melt said organic carrier material and flushing the colorant onto the organic carrier material with the concomitant formation of a colorant-free separate water phase, wherein the improvement consists essentially of kneading the mixture of molten colorant composition and separate colorant-free water while cooling the kneader and the mixture to a temperature below the softening point of the organic carrier, a temperature sufficient to cause the molten colorant composition to solidify, and concomitantly comminuting the solidified colorant composition into broken, irregular granulates in the presence of the colorant-free water.