pearlescent pigments based on monolithically constructed substrates, methods for their production and use of these pearlescent pigments

摘要

The present invention relates to semitransparent pearlescent pigments, methods for producing them, and the use of such pearlescent pigments, wherein pearlescent pigments are comprised of monolithically constructed substrate platelets composed of a metal oxide which is provided with an average thickness of 1 to 40 nm and a form factor, expressed as the ratio of average size to average thickness, of at least 80 which is encapsulated by at least one substantially transparent coating consisting of at least one metal oxide of Low refractive index and / or metal oxide hydrate, which has a refractive index of less than 1.8, and comprises at least one interference layer in the form of a coating b composed of at least one metal oxide. high refractive index, which has a refractive index of at least 1.8.