Black iron oxide pigments stable to reduction and oxidation, of great coloring power, for dyeing plastics and building materials

摘要

Iron oxide black pigment * with the incorporation in HDPE of a chromatic shift ΔE * according to DIN 5 DIN 53772 and DIN 6174 at 260 ° C of 0.7, in particular from 0.5 and * to 140 ºC has oxidation stability according to the IMCO test and * has a reduction ratio for the characteristic color intensity value B 1/9 according to DIN 53235 parts 1 and 2 of 1.9 and * has a b * value in accordance with DIN 6174, measured in lighting in L64 of - 3.9, in particular of - 4.3.