Patent ID: 6103795
Filing Date: 2000-08-15
Classification: C08F,C09D

Abstract:
High molecular weight organic material pigmented with pigment preparations prepared by mixing a colored composition with monomers and simultaneously polymerizing the monomers in an extruder at elevated temperatures, wherein the process for preparing said pigment preparations comprises(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 one monomer selected from the group consisting of acrylates and methacrylates, whereby the amounts of pigment and monomer sum up to 100%, and(c) from 0 to 10% by weight, based on the amount of component (b), of an initiator, and(B) simultaneously mixing the components (a), (b), and, optionally, (c) in the extruder, and(C) continuously withdrawing the obtained reaction mixture from the extruder.