Merck Patent Gmbh

Merck Patent Gesellschaft MIT Beschrankter Haftung

Merck Patent Gesellschaft MIT Beschraenkter Haftung

Katsuhisa Nitta

Gerhard Pfaff

Ryuta Suzuki

Sabine Schoen

Koshiro Kunii

Satoru Kobayashi

Fumiko Sasaki

Noriyuki Matsuda

Bangyin Li

Yuji Takenaka

Reiner Vogt

Takaji Watanabe

Isao Suzuki

Tamio Noguchi

Johann Dietz

Stephanie Andes

Klaus-Dieter Franz

Klaus Ambrosius

Martin Friz

Klaus D Franz

Stefan Wilhelm

Michael Uhlig

Nobuaki Nakamura

Norio Takahashi

Kazuhisa Iwasa

Kunimitsu Ohira

Ruediger Oesten

Jotoh Mansion B-303 Bangyin Li

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

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.

Highly anti-corrosive thin-platelet like metal pigments having high corrosion resistance and good dispersibility characterized in that the inherent metallic luster of the thin-platelet like metal substrates is maintained without demanding the original surface smoothness are provided. The highly anti-corrosive thin-platelet like metal pigments comprising, on the surface of thin-platelet like metal substrates treated with phosphoric acid compounds and/or boric acid compounds, one or more coated layers containing one or more hydrated metal oxides of one or more metals selected from the group consisting of silicon, aluminum, zirconium, titanium and tin.

Highly anti-corrosive metal pigments

A positive-electrode active material for non-aqueous electrolyte secondary cells which combine improved discharge property and operational safety, and a process for preparing the same are provided. The positive-electrode active material comprises a base and one or more layers for coating the base, wherein at least one of the layers is a coating layer comprising one or more metallic components and one or more components selected from the group consisting of sulfur, selenium, and tellurium.

Positive-electrode active material for non-aqueous electrolyte secondary cell and process for preparing the same

A pigment with a metallic luster, comprising a wafer-like substrate made of aluminium dioxide having a thickness of more than 250 nm and less than 1 &#x3bc;m, which is fully enveloped by a metal layer.

Pigment with a metallic luster

This invention provides a highly orientated surface-modified pearl pigment excellent in plane orientation (leafing effect). Disclosed are: a surface-modified pearl pigment wherein fine polymer particles adhere, without being mutually aggregated, to hydrated metal oxides via chemical bonding; a process for producing the same: and use thereof for inks, coatings and plastics.

Surface-modified pearl pigment and process for producing the same

Highly orientated flaky pigment and a process for producing the same

Platelet-like colored pigments and process for producing the same

Anti-discoloring pearly luster pigment and method of preparing the same

A process for the preparation of light-colored, electrically conductive pigments based on substrates having an expansion of not more than 500 .mu.m, which pigments consist of one or more metals, metal oxides or materials containing metal oxide, silicon oxide or silicate materials and contain, if desired above one or more other metal oxide and/or silicon oxide layers, an outer layer based on halogen-doped tin oxide and/or titanium oxide.

Electrically conductive pigments

The invention relates to oxidized graphite flaky particles obtainable

Growing community of inventors

Fukushima-ken, Japan

Katsuhisa Nitta