Eckart Gmbh

Eckart Gmbh & Co. Kg

Glassflake Limited

Eckart-Werke Standard Bronzepūlver-Werke Carl-Eckart Gmbh & Co.

Günter Kaupp

Michael Grüner

Dirk Schumacher

Ulrich Schmidt

Ralph Schneider

Frank Henglein

Thomas Schneider

Stefan Trummer

Peter Krüger

Katrin Steinbach

Klaus Greiwe

Robert Maul

Oliver Bedford

Barbara Mendler

Christian Rummer

Gunter Sommer

Carolin Brendel

Stefan Engel

Thomas Schuster

Christian Wolfrum

Thomas Voit

Burkhard Schreiber

Michael Gruener

Wolfgang Trenz

Dietmar Mäder

Andreas Gipp

Jens Depner

Peter Krueger

Alexander Albrecht

Roland Albert

This invention deals with effect pigment mixture comprising platelet-like aluminum effect pigments obtained by grinding of aluminum or aluminum based alloy shot and silvery pearlescent pigments, wherein the silvery pearlescent pigments are taken from the group consisting of: a) pearlescent pigments comprising a transparent substrate which is coated with a high-refractive index layer with n>1.8, which comprises or consists of an iron-oxide with Fe(II)-ions, b) pearlescent pigments comprising a transparent substrate which is coated with a high-refractive index layer with n>1.8, which comprises or consists of titanium suboxide or a pearlescent pigment comprising a substrate with a high-refractive index with n>1.8 layer, which comprises or consists of a titanium suboxide that is optionally coated with a high-refractive index layer with n>1.8, c) pearlescent pigments comprising a transparent substrate which is coated with a high-refractive index layer with n>1.8, which comprises or consists of titanium oxynitride, d) pearlescent pigments comprising a transparent substrate which is coated with a layer comprising carbon, wherein the carbon is enclosed in a particulate form in another metal oxide layer or is formed as a separate, individual layer, e) a transparent substrate coated with a first layer comprising or consisting of a mixture of the oxides of titanium, iron and at least one of cobalt and chromium and a second layer on the first layer, wherein the second layer comprises an oxide of titanium, and mixtures or combinations of the pearlescent pigments a) to e) or pearlescent pigments with mixtures or combinations of the various coating layers mentioned in the pearlescent pigments a) to e), wherein the weight ratio of the pearlescent pigment to the aluminum effect pigment is in a range of 0.4 to 5.0. The invention deals also with a coating formulation containing this effect pigment mixture.

Radar frequency transparent effect pigment mixture, formulations and coatings thereof

This invention deals with effect pigment mixture comprising platelet-like aluminum effect pigments obtained by grinding of aluminum or aluminum based alloy shot and silvery pearlescent pigments, wherein the silvery pearlescent pigments are taken from the group consisting of: a) pearlescent pigments comprising a transparent substrate which is coated with a high-refractive index layer with n&#x3e;1.8, which comprises or consists of an iron-oxide with Fe(II)-ions, b) pearlescent pigments comprising a transparent substrate which is coated with a high-refractive index layer with n&#x3e;1.8, which comprises or consists of titanium suboxide or a pearlescent pigment comprising a substrate with a high-refractive index with n&#x3e;1.8 layer, which comprises or consists of a titanium suboxide that is optionally coated with a high-refractive index layer with n&#x3e;1.8, c) pearlescent pigments comprising a transparent substrate which is coated with a high-refractive index layer with n&#x3e;1.8, which comprises or consists of titanium oxynitride, d) pearlescent pigments comprising a transparent substrate which is coated with a layer comprising carbon, wherein the carbon is enclosed in a particulate form in another metal oxide layer or is formed as a separate, individual layer, e) a transparent substrate coated with a first layer comprising or consisting of a mixture of the oxides of titanium, iron and at least one of cobalt and chromium and a second layer on the first layer, wherein the second layer comprises an oxide of titanium, and mixtures or combinations of the pearlescent pigments a) to e) or pearlescent pigments with mixtures or combinations of the various coating layers mentioned in the pearlescent pigments a) to e), wherein the weight ratio of the pearlescent pigment to the aluminum effect pigment is in a range of 0.4 to 5.0. The invention deals also with a coating formulation containing this effect pigment mixture.

The invention relates to effect pigments comprising artificial platelet-shaped substrates which have at least one optically active coating, where the effect pigments have a volume-averaged cumulative undersize distribution curve with the characteristic numbers D, Dand D, said cumulative undersize distribution curve having a span &#x394;D of 0.7-1.4, and the span &#x394;D being calculated in accordance with formula (I):&#x394;=()/&#x2003;&#x2003;(I),and the average thickness of the artificial platelet-shaped substrates being 500 nm to 2000 nm.

Effect pigments based on artificially produced substrates with a narrow size distribution

Pearlescent pigments including a largely transparent platelet-shaped substrate having a density &#x3c1;and at least one optically active coating having a density &#x3c1;, the substrate having an average size dof 3 to 8 &#x3bc;m and an average height hof 40 to 110 nm. The disclosure further relates to a method for producing the pearlescent pigments, and also to the use thereof.

Pearlescent pigments based on fine and thin substrates

The present invention relates to red effect pigments including a nonmetallic substrate in platelet form and a coating applied thereto, wherein the coating includes at least one of metal oxide, metal hydroxide or metal oxide hydrate, the metal ions of the metal oxide, metal hydroxide and/or metal oxide hydrate comprise at least two different metal ions selected from the group of metals consisting of Fe, Sn, Ti and Zr, and to a process for production thereof and to the use of the red effect pigments.

Red-coloured decorative pigments with high chroma and high brilliancy, method for their production and use of same

The present invention relates to gold-colored effect pigment including a nonmetallic substrate in platelet form and a coating applied thereto, wherein the coating includes at least one spacer layer. The invention further relates to a process for production of and to the use of the gold-colored effect pigment.

Gold-coloured effect pigments having high chroma and high brilliancy, method for the production and use thereof

The invention relates to a transparent effect pigment which includes a non-metallic platelet-shaped substrate and a coating applied thereto, wherein the coating has a spacer layer. The invention further relates to a method for the production, as well as the use, of the transparent effect pigment.

Effect pigments having high transparency, high chroma and high brilliancy, method for the production and use thereof

The invention relates to an absorbent effect pigment including a nonmetallic substrate in platelet form and a coating applied thereto, wherein the coating includes at least one spacer layer. The invention further relates to a process for production of and to the use of the absorbent effect pigment.

Effect pigments with high chroma and high brilliancy, method for the production and use thereof

The invention relates to a metal effect pigment including a metallic substrate in platelet form and a coating applied thereto, wherein the coating includes a spacer layer. The invention further relates to a process for production of and to the use of the metal effect pigment.

Metal effect pigments with high chroma and high brilliancy, method for the production and use thereof

The invention relates to pearlescent pigments comprising a largely transparent platelet-shaped synthetic substrate having a density &#x3c1;and at least one optically active coating having a density &#x3c1;, the substrate having an average size dfrom a range from 2.0 &#x3bc;m to 8.0 &#x3bc;m and an average height hfrom a range from 40 nm to 110 nm and the total lead content of the pearlescent pigments is &#x2264;10 ppm. The invention further relates to a method for producing the pearlescent pigments, and also to the use thereof.

Pearlescent pigments on the basis of fine and thin synthetic substrates

The invention relates to platelet-shaped pearlescent pigments that are coated with at least one mixed inorganic/organic layer for improving their application properties, and of these, particularly their mechanical properties, and to methods for the production thereof and to the use thereof. The said mixed inorganic/organic layer comprises at least one at least partially crosslinked inorganic metal-oxide component and an organic component. The organic component is at least one organic oligomer and/or polymer, which is covalently bonded, at least in part, to the inorganic network via network formers, wherein the coating comprises at least one mixed inorganic/organic layer, which mixed mixed layer comprises, at least in part, an inorganic network having one or more inorganic oxide component(s) and at least one organic component, the organic component being, at least in part, an organic oligomer and/or polymer covalently bonded, at least in part, to the inorganic network via one or more organic network formers. The invention also relates to a method for the production of such pearlescent pigments.

Pearlescent pigments coated with mixed inorganic/organic layers and method for the production thereof

The invention relates to pigments with a non-metallic substrate, wherein the pigments have at least one barrier layer that selectively absorbs light and/or electrons and at least one photocatalytically active layer, wherein the at least one barrier layer is arranged between the non-metallic substrate and the at least one photocatalytically active layer. The invention furthermore relates to a method for producing the pigments and to a coating agent.

Pigment with photocatalytic activity, method for the production thereof and coating agent

The present invention relates to an effect pigment comprising as a substrate a glass flake with a coating, said coating comprising at least one layer of at least one high refractive material, said material having a refractive index of at least 1.8, and/or at least one layer of at least one semitransparent metallic material, wherein said glass flakes comprising the following composition: 65-75 wt.-% silicon oxide, preferably SiO2-9 wt.-% aluminum oxide, preferably AIO0.0-5 wt.-% calcium oxide, preferably CaO 5-12 wt.-% sodium oxide, preferably NaO 8-15 wt.-% boron oxide, preferably BO0.1-5 wt.-% titanium oxide, preferably TiO0.0-5 wt.-% zirconium oxide, preferably ZrObased on the weight of said glass flakes. The invention relates also to a method for producing the effect pigments as well as to the use of said effect pigments. The invention further relates to coating formulations based on the effect pigments.

Effect pigments comprising a glass flake substrate

The present invention relates to weather-resistant pearlescent pigment, comprising a coated or uncoated platelet-shaped substrate which is selected from the group consisting of synthetic mica platelets, glass platelets, SiOplatelets, AlOplatelets, synthetic boehmite platelets, BiOCl platelets and mixtures thereof, a chromophoric coating with at least one highly refractive metal oxide, and a top layer, wherein the top layer comprises the following layer sequence:a) a first layer made of tin oxide and/or tin hydroxide and/or hydrated tin oxide, b) a second cerium-containing layer which comprises cerium oxide and/or cerium hydroxide and/or hydrated cerium oxide, c) an organic-chemical coating applied to the cerium-containing layer which contains oligomeric silanes or consists of them, wherein the oligomeric silanes have one or more amino groups and the oligomeric silanes are chemically bonded with the cerium-containing layer. The invention further relates to a process for the production and use of these pearlescent pigments.

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Neuhaus, Germany

Günter Kaupp