Method of producing coloured plastics or coloured polymeric particles

摘要

The present invention relates to a method of producing coloured plastics or coloured polymeric particles which comprises using a dye of formula (1), wherein R1 is a radical of formula (2) or of formula (3), wherein R2 is hydrogen or C1-C4alkyl, and R3 is hydrogen or C1-C4alkyl, and/or a dye of formula (4) and a UV absorber.