Continuous process for preparing acrylate based pigment preparations

摘要

Process for preparing pigment preparations by mixing a colored composition with monomers and simultaneously polymerizing the monomers in an extruder at elevated temperatures, whereby the following steps are carried out: (A) introducing continuously into an extruder (a) from 40 to 90 % by weight of a pigment, (b) from 60 to 10 % by weight of at least a monomer, selected from the group consisting of an acrylate and a methacrylate, whereby the amounts of pigment and monomer sum up to 100%, and, if desired, (c) from 0 to 10 % by weight, based on the amount of component (b), of an initiator, and (B) mixing the components (a), (b), and, if desired, (c) therein, and (C) withdrawing continuously the obtained reaction mixture from the extruder, and a high molecular organic material pigmented with the pigment preparation.