Dust-free, dispersible compacted or briquetted carbon@ black for colouring building or organic materials - made using processing aid by compacting, pulverising and separating into fractions

摘要

Production of compacted or briquetted carbon black pigment granulate comprises: (a) mixing the pigment with one or more processing aids; (b) compacting or briquetting the mixture; (c) pulverising the product; (d) separating into two or more fractions; and (e) removing as final product the fraction with at least 85% of particles above 80 (especially above 100) mu m or with size 80-2,000 (especially 100-1,000) mu m and optionally rounding it, and discarding or recycling the other fraction(s).