Merck Patent Gmbh

Merck Patent Gesellschaft MIT Beschrankter Haftung

Merck Patent Gesellschaft

Merck Patent Gesellschaft MIT Beschraenkter Haftung

Merck Patent Gesellschaft MIT Beschr&auml;nkter Haftung

Merck Patent Gesellschaft MIT

Gerhard Pfaff

Matthias Kuntz

Sabine Schoen

Stephanie Andes

Reiner Vogt

Katsuhisa Nitta

Helge Bettina Kniess

Johann Dietz

Gerd Bauer

Karl Osterried

Michael Schmelz

Ryuta Suzuki

Andrea Heyland

Doreen Warthe

Klaus Bernhardt

Reiner Delp

Christina Schank

Cornelia Foerderer

Dieter Br&uuml;ckner

Satoru Kobayashi

Ralf Glausch

Martin Friz

Dieter Heinz

Fumiko Sasaki

Noriyuki Matsuda

Koshiro Kunii

Gerald Fuchs-Pohl

Michael Uhlig

G&uuml;nter Brenner

Stefanie Andes

Gunter Brenner

Dieter Bruckner

Yuji Takenaka

Eike Poetsch

David Coates

Christoph Schmidt

Volker Hilarius

Wolfgang Hechler

Stephan Derow

Otto Stahlecker

Peter Reynders

Wolf-Dietrich Weber

Klaus Bernhard

Sabine Hock

Dietmar Rahner

Matthias Kloss

Waldfried Plieth

Kaiman Shimizu

Manfred Kieser

Ralf Petry

Reinhold Rueger

Klaus Ambrosius

Ralf Anselmann

Rodney Riddle

Susanne Rudolph

Klaus D Franz

Hans-Dieter Bruckner

Hans-Dieter Br&uuml;ckner

Joachim Weitzel

Veronika Hochstein

Frank Ott

Hans-Juergen Brehm

Elke Steudel

Manfred Thon

Wilhelm Gobel

Sylvia Schmidt

Michael Roesler

Nicole Haferkorn

Doreen McFarlane

Siegfried Raabe

Xenia Petsitis

Carsten Brab&auml;nder

Alexandra Brownfield

Norio Takahashi

Nishimagi Atsuko

Nitta Katsuhisa

Alpha-Alumina flakes having a particle thickness of 130-400 nm, a D-value of 15-30 μm, a D-value of 30-45 μm and a D-value of <9.5 μm. Use of the alumina flakes in varnishes, paints, automotive coatings printing inks, masterbatches, plastics and cosmetic formulations. Also, use of the alumina flakes as a substrate for effect pigments and in organic dyes.

Alpha-alumina flakes

α-alumina flakes

The present invention relates to effect pigments which are based on flake-form substrates having a circular form factor of 1.2-2 and are coated with at least one high-refractive-index layer, and to the use thereof, inter alia in paints, coatings, printing inks, plastics and in cosmetic formulations.

Effect pigments

A blended composition containing uncoated AlOflakes having a thickness of &#x2265;500 nm and a D-value of 15-30 &#x3bc;m and a D-value of 30-45 &#x3bc;m, and/or coated AlOflakes having a thickness of &#x2265;500 nm and a D-value of 15-30 &#x3bc;m and a D-value of 30-45 &#x3bc;m, which have been coated with at least one layer of a metal oxide, mixtures of at least two metal oxides, metal, metal sulphide, titanium suboxide, titanium oxynitride, FeO(OH), metal alloys and/or rare earth compounds, and their use in various formulations.

The present invention relates to alumina flakes having a defined thickness and particle size distribution and to their use in varnishes, paints, automotive coatings printing inks, masterbatches, plastics and cosmetic formulations and as substrate for effect pigments.

&#x3b1;-alumina flakes

Alpha-Alumina flakes having a particle thickness of 130-400 nm, a D-value of 15-30 &#x3bc;m, a D-value of 30-45 &#x3bc;m and a D-value of &#x3c;9.5 &#x3bc;m. Use of the alumina flakes in varnishes, paints, automotive coatings printing inks, masterbatches, plastics and cosmetic formulations. Also, use of the alumina flakes as a substrate for effect pigments and in organic dyes.

Alpha-Alumina flakes having a particle thickness of 550-1000 nm, a D-value of 15-30 &#x3bc;m, a D-value of 30-45 &#x3bc;m and a D-value of &#x2264;9.0 &#x3bc;m. Use of the alumina flakes in varnishes, paints, automotive coatings printing inks, masterbatches, plastics and cosmetic formulations. Also, use of the alumina flakes as a substrate for effect pigments and in organic dyes.

The present invention relates to silver-colored effect pigments having a strong sparkle effect based on Al2O3 flakes and to the use thereof in paints, button pastes, automotive paints, automotive refinish paints, powder coatings, printing inks, security printing inks, plastics, ceramic materials, glasses, paper, for coating seed, in security applications, as dopant for the laser marking of plastics and papers, as additive for the laser welding of plastics, in cosmetic formulations and for the preparation of pigment preparations and dry preparations.

The present invention relates to pigments comprising a substrate and, applied thereto, an iron-containing coating comprising metallic iron, process for the preparation of the pigments according to the invention, and the use thereof.

Pigments

Disclosed are yellowing-stable, silver-white effect pigments having high whiteness based on synthetic mica flakes and to the use thereof in paints, lacquers, printing inks, plastics, button pastes, ceramic materials, glasses, for coloring seed, as dopant in laser markings of plastics and papers, as additive for laser welding of plastics, as additive for coloring in the foods and pharmaceuticals sectors and in cosmetic formulations, and for the preparation of pigment compositions and dry preparations.

The present invention relates to semitransparent interference pigments having a neutral mass tone comprising a substrate and a coating comprising metallic tin and additionally at least one metal oxide, to a process for the preparation of these pigments, and to the use thereof.

Semi-transparent interference pigments containing tin

The invention relates to an interference pigment with a high covering power, comprising at least one FeTiO-containing layer, which is applied to a lamellar inorganic substrate and whose thickness and absorbing power can be precisely set. The invention also relates to a method for producing this interference pigment and to the use thereof.

Interference pigment with a high covering power

Disclosed are transparent conductive pigments of flake-form substrates coated with a conductive layer, where the number-weighted mean particle area Fof the transparent conductive pigments is greater than or equal to 150 &#x3bc;m, and processes for the production of the pigments, and the use thereof.

Transparent conductive pigments

Effect pigments having improved optical properties based on SiOflakes coated with one or more layers, where the SiOflakes have a thickness of from 50 nm to 150 nm; processes for the preparation thereof; and use of these pigments in cosmetics, paints, coatings, plastics, films, in security printing, in security features in documents and identity cards, for coloring seed, for coloring foods or in medicament coatings and for the preparation of pigment compositions and dry preparations; are disclosed.

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Muenster, Germany

Gerhard Pfaff