Patent ID: 8940189
Filing Date: 2015-01-27
Classification: C01P,C08K,C09C,C09D,Y10T

Abstract:
1. A pigment powder comprising a pigment comprising a flake-form transparent or semitransparent electrically conductive core and at least one coloring dielectric layer surrounding the electrically conductive core, wherein the electrically conductive core has a transparent or semitransparent flake-form substrate and a coating located on all or both sides of the substrate, where the coating has a single- or multilayered structure and at least the outer layer of the coating represents an electrically conductive layer comprising metal oxides doped with gallium, aluminium, indium, thallium, germanium, tin, phosphorus, arsenic, antimony, selenium, tellurium, molybdenum, tungsten and/or fluorine, said electrically conductive layer having a layer thickness of at least 15 nm, and wherein the transparent or semitransparent substrate is synthetic or natural mica, talc, kaolin, glass flakes, flake-form SiO 2 or flake-form Al 2 O 3 , and wherein said pigment powder is not electrically conductive.