COLORANT CONCENTRATES FOR DYEING POLYOXYMETHYLENE MOULDING MATERIALS

摘要

The invention relates to colorant concentrates comprising an easy-flow polyoxymethylene copolymer as carrier, between 15 and 80 weight percent of colorant, between 2 and 15 weight percent nitrogen-containing stabiliser and between 0 and 15 weight percent dispersing agent for dyeing granulates or moulding materials made of polyoxymethylene (POM) and for producing coloured injection moulded parts or coloured POM extrudates. The products made using this colorant preparation are especially stable during processing and are characterized by very low formaldehyde emission.