Merck Patent Gesellschaft MIT Beschrankter Haftung

Merck Patent Gmbh

Merck Patent Gesellschaft MIT Beschraenkter Haftung

Merck Patent Gesellschaft MIT Beschr&auml;nkter Haftung

Peter Reynders

Gerhard Pfaff

Christoph Schmidt

Helge Bettina Kniess

Elke Steudel

Sabine Schoen

Reiner Vogt

Wolfgang Hechler

Johann Dietz

Stephanie Andes

Hans-Dieter Br&uuml;ckner

Hans D Bruckner

Margarete Herbski

Sabine George

Carsten Brab&auml;nder

St&eacute;phane Bertaux

Eberhard Schweda

Jens-Uwe Wichmann

The present invention relates to multilayer pigments based on platelet-shaped metal substrates coated with two or more metal oxide layers by a one-pot process in an exclusively aqueous medium. The invention further relates to the use of the multilayer pigments in paints, varnishes, printing inks, including security printing inks, plastics, ceramic materials and cosmetic and for the laser formulations marking of plastics.

Multilayer pigments based on coated metal platelets

The invention relates to a transparent medium comprising multilayer pigments having angle-selective reflection or transmission properties and/or absorption properties, and to their use, in particular in transparent thermal insulation systems (TTIs).

Transparent medium having angle-selective transmission or reflection properties and/or absorption properties

The present invention relates to pearlescent pigments based on substrates coated with one or more layers of nitrides or oxynitrides to a method for the production of such pigments and their use in plastics, paints, coatings, powder coatings, inks, printing inks, glasses, ceramic products, agriculture foils, for lasermarking of papers and plastics, security applications and in cosmetic formulations.

Pearlescent pigments

The invention relates to multilayered interference pigments which comprise a platelet-shaped substrate of silicon dioxide which is coated alternately with layers of light-transparent materials having refractive indices of n>1.8 and layers of light-transparent materials having refractive indices of n&lE;1.8, where the optical thickness of the platelet-shaped substrate and the optical thickness of the individual layers of light-transparent materials having refractive indices of n&lE;1.8 are the same.

Multilayered interference pigments

The present invention relates to laser-markable plastics whose feature is that they comprise non-lustrous pigments based on phyllosilicates which have an irregular surface.

Laser-markable plastics comprising non-platelet phyllosilicate

The present invention relates to platelet-like pigments of dark surface color and to their preparation process and use.

Pigments of dark surface color

Pigments

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Griesheim, Germany

Peter Reynders