Iron, Tungsten, Molybdenum, Or Cerium Compound Containing (fe, W, Mo, Ce) Patents (Class 106/439)
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Publication number: 20100011992Abstract: The present invention relates to novel pigment mixtures comprising at least two different particulate components A and B. The first component A comprises titanium suboxide(s), a titanium oxynitride or a titanium nitride species. Component B particle comprises inorganic, or organic pigments. The titanium suboxide particles display a bluish metallic luster, are new and form a further aspect of the present invention. When combined with particles from component B such as variously coated micas, for example, the bluish or bluish/black metallic color effect from component A leads to special color effects in the various mixtures.Type: ApplicationFiled: December 17, 2007Publication date: January 21, 2010Inventors: Patrice Bujard, Philippe Bugnon, Marc Mamak, Urs Leo Stadler
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Patent number: 7611574Abstract: The invention relates to an interference pigment with a high covering power, comprising at least one FeTiO3-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.Type: GrantFiled: May 5, 2004Date of Patent: November 3, 2009Assignee: Merck Patent Gesellschaft Mit Beschrankter HaftungInventors: Helge Kniess, Gerhard Pfaff, Klaus Bernhardt
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Publication number: 20090266269Abstract: A household wall non-toxic paint additive comprised of mixture of solvent-soluble compounds, which fine granulated from available mineral composition, with dipole properties, in which aromatic oils can be added to the paint additive is enclosed in this current application. This nontoxic paint additive makes for a type of special painting material, in the current application, is non-harmful for man.Type: ApplicationFiled: April 23, 2008Publication date: October 29, 2009Inventors: Kwang Kook Lee, Shin Jong Chang
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Publication number: 20090260541Abstract: An ultra-fine powder formed from a naturally occurring mineral or rock material and having a controlled or “engineered” particle size distribution (PSD) to match the infrared spectra with a maximum particle size in the range of 14-17 microns measured as either D99, or preferably D95, and a minimum particle size D5 in the range of 4-7 microns. Preferably the maximum particle size is about 15 microns, the minimum particle size is about 5 microns and the D50 particle size is about 8-10 microns with the moisture content of the particle size “engineered” powder being less than about 0.20 percent by weight and preferably about 0.05 to 0.08 percent by weight of the powder. This specially “engineered” ultra-fine powder is used to reduce the thermicity of thermal film to a value less than about 20%.Type: ApplicationFiled: September 25, 2008Publication date: October 22, 2009Inventors: David D. Kragten, Christy Karr, JR., Scott VanRemortel, Robert Ratcliff, Ibezim Anazia, Louis M. Schlesinger
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Publication number: 20090255442Abstract: A pearlescent pigment and a process for enhancing the magnetic properties of a pearlescent pigment. The pearlescent pigment has a layer with regions of ?-Fe2O3 and regions of ?-Fe2O3. The magnetic properties of a pearlescent pigment may be enhanced by the steps of: providing a platelet pigment with a layer of Fe2O3, with a magnetic susceptibility less than 0.1×10?5 m3/kg; reducing some or all of the Fe2O3 to Fe3O4; and oxidizing some or all of the Fe3O4 to ?-Fe2O3. The color difference (?E*) between the provided pigment and the resultant pigment is not more than about 5.Type: ApplicationFiled: April 9, 2008Publication date: October 15, 2009Inventors: Aaron M. Hollman, Philippe Schottland
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Publication number: 20090249979Abstract: The invention relates to a pearlescent pigment comprising a metal oxide-containing, platelet-shaped substrate and having a first and a second protective layer, wherein the metal oxide has a refractive index greater than 1.Type: ApplicationFiled: February 23, 2007Publication date: October 8, 2009Inventors: Günter Kaupp, Ulrich Schmidt
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Publication number: 20090246294Abstract: The invention relates to pigment mixtures comprising at least two components A and B. The inventive pigment mixtures are characterized in that component A is embodied as effect pigments while component B is embodied as coloring agents and fillers. Also disclosed is the use of said pigment mixtures in cosmetic formulations and for coloring food products and pharmaceutical products.Type: ApplicationFiled: May 9, 2007Publication date: October 1, 2009Inventors: Veronika Hochstein, Christoph Schmidt, Sabine Schoen
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Publication number: 20090185992Abstract: A pearlescent pigment, wherein the pigment is an inorganic material and the color of a homogeneous coating of the pigment, measured over a black background has a CIELAB hue angle, hab, from about 40 to about 320 degrees, wherein L* is from about 35 to about 80, and the chroma value is less than 5. A substrate is coated with iron oxide by oxidizing an iron salt to form a pigment. The pigment may be made by a process of coating iron oxide on a substrate by oxidizing an iron salt. During the coating of the iron oxide, the pH of the mixture is increased. The coating formed has a Fe(III)/Fe(II) ratio of greater than 2. The pigments may be used in a variety of applications including coating, ink, plastic, and cosmetic compositions.Type: ApplicationFiled: January 18, 2008Publication date: July 23, 2009Inventors: Christelle Conan, Aaron M. Hollman, Philippe Schottland, Stephane Nicolas, Marguerite Debacker, Aurelie Antonowicz, Kenneth A. Fields, II
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Publication number: 20090013905Abstract: An ultra-fine nepheline syenite powder produced from a pre-processed nepheline syenite powder feedstock. The powder having a “controlled” maximum grain size D95 or D99 of less than about 20 microns and a “controlled” minimum grain size D5 in the range of 2-8 microns with a particle size spread D5-D95 of less than about 12 microns.Type: ApplicationFiled: June 27, 2008Publication date: January 15, 2009Inventors: Scott VanRemortel, Robert Ratcliff, Ibezim Anazia, Louis M. Schlesinger
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Publication number: 20090004390Abstract: The present invention is directed to pigment compositions, thick film black pigment compositions, conductive single layer thick film compositions, black electrodes made from such black conductive compositions and methods of forming such electrodes, and to the uses of such compositions, electrodes, and methods in flat panel display applications, including alternating-current plasma display panel devices (AC PDP).Type: ApplicationFiled: June 28, 2007Publication date: January 1, 2009Inventors: Jerome David Smith, Pedro A. Jimenez, Tony Jackson
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Publication number: 20080295736Abstract: The invention relates to a pearl pigment, and the preparing method of the same comprises: coating metal oxides on a sheet-like substrate, and coating metal phosphites (aluminum phosphite or zinc phosphite) on it, and then treating by hydrolysable silane coupling agent. The pearl pigment obtained highly improves its stability and its aging resistance when used for external outsides.Type: ApplicationFiled: September 21, 2005Publication date: December 4, 2008Inventors: Yizhong Lin, Wensong Jin
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Publication number: 20080279796Abstract: The present invention relates to effect pigments comprising transition-metal oxides or transition-metal hydroxyoxides or transition-metal hydroxides based on flake-form substrates which are uncoated or coated with one or more metal oxides, and to the use thereof, inter alia in paints, coatings, printing inks, plastics and in particular in cosmetic formulations.Type: ApplicationFiled: March 5, 2008Publication date: November 13, 2008Inventors: Carsten HANDROSCH, Frank Pflucker
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Publication number: 20080207772Abstract: The present invention relates to a mixture of interference pigments, where the mixture comprises at least one interference pigment A comprising a substrate and a coating comprising metallic iron, and an interference pigment B comprising a substrate and a coating comprising metallic tin and in addition at least one metal oxide, to the use thereof in cosmetics, surface coatings, inks, plastics, films, in security printing, in security features in documents and identity papers, for colouring seed, for colouring foods, for laser marking or in medicament coatings and for the preparation of pigment compositions and dry preparations, and to cosmetics, surface coatings, inks, plastics, films, documents and identity papers, seed, foods or medicament coatings, pigment compositions and dry preparations comprising the mixture according to the invention.Type: ApplicationFiled: June 9, 2006Publication date: August 28, 2008Inventors: Helge Bettina Kniess, Gerhard Pfaff
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Patent number: 7387672Abstract: The present invention relates to oxidation-stable iron oxide pigments which have a coating of at least one organic substance, to their preparation and to their use.Type: GrantFiled: May 1, 2007Date of Patent: June 17, 2008Assignee: LANXESS Deutschland GmbHInventor: Holger Friedrich
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Publication number: 20080134941Abstract: The present invention relates to an infrared reflecting black pigment which comprises a composite oxide containing Fe, Co and at least one metal selected from the group consisting of Al, Mg, Ca, Sr, Ba, Ti, Zn, Sn, Zr, Si and Cu; has an average plate surface diameter of 0.02 to 5.0 ?m, a blackness (L* value) of not more than 30, an average reflectance of not more than 10% in a visible light wavelength range of 250 to 780 nm and an average reflectance of not less than 35% in an infrared wavelength range of 780 to 2500 nm. There is provided an infrared reflecting black pigment which is capable of producing a heat-shielding paint containing no harmful elements and exhibiting an excellent infrared reflecting property.Type: ApplicationFiled: February 8, 2006Publication date: June 12, 2008Inventor: Kazutoshi Sanada
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Publication number: 20080115694Abstract: A pearlescent pigment, wherein the pigment is an inorganic material and the color of a homogeneous coating of the pigment, measured over a white background, is selected from the group consisting of: a CIELAB L* value of about 30 or less and a chroma value of about 3 or less; a CIELAB hue angle, hab, from about 50 to about 80 degrees, wherein L* is not more than about 85, and the chroma value is greater than 22; a CIELAB hue angle, hab, from about 80 to about 275 degrees, wherein L* is not more than about 80, and the chroma value is greater than about 10; and a CIELAB hue angle, hab, from not less than about 275 to not more than about 50 degrees, wherein L* is not more than about 85, and the chroma value is greater than about 9. The pigments may be used in a variety of applications including cosmetics, plastics, automotive, or architectural coatings.Type: ApplicationFiled: October 31, 2007Publication date: May 22, 2008Inventors: Aaron M. Hollman, Stephane Nicolas, Philippe Schottland, Marguerite Debacker, Aurelie Antonowicz, Hai Hui Lin
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Publication number: 20080110372Abstract: A pearlescent pigment comprising a substrate and a first layer, wherein the first layer comprises iron oxide, wherein the iron has from about 1% to about 30% Fe(II) and from about 70% to about 99% Fe(III). A process for making these pearlescent pigment, comprise reducing a metal oxide substrate with a hydrogen source in the presence of a noble metal catalyst in a liquid medium. The pigments may be used in a variety of applications including cosmetics, plastics, automotive, or architectural coatings.Type: ApplicationFiled: October 31, 2007Publication date: May 15, 2008Inventors: Aaron M. Hollman, Stephane Nicolas, Philippe Schottland, Marguerite Debacker, Aurelie Antonowicz, Hai Hui Lin
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Patent number: 7341626Abstract: A pigment composition containing one or more, organic yellow pigments selected from the group C.I. Pigment Yellow (213), Pigment Yellow (214) and disazo pigment of the formula (I) and containing one or more inorganic pigments.Type: GrantFiled: August 18, 2004Date of Patent: March 11, 2008Assignee: Clariant Produkte (Deutschland) GmbHInventors: Joachim Weber, Gerhard Wilker
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Patent number: 7291217Abstract: A corrosion-inhibiting pigment comprising a rare earth element and a valence stabilizer combinded to form a rare earth/valence stabilizer complex. The rare earth element is selected from cerium, terbium, praseodymium, or a combination thereof, and at least one rare earth element is in the tetravalent oxidation state. An inorganic or organic material is used to stabilize the tetravalent rare earth ion to form a compound that is sparingly soluble in water. Specific stabilizers are chosen to control the release rate of tetravalent cerium, terbium, or praseodymium during exposure to water and to tailor the compatibility of the powder when used as a pigment in a chosen binder system. Stabilizers may also modify the processing and handling characteristics of the formed powders. Many rare earth-valence stabilizer combinations are presented that can equal the performance of conventional hexavalent chromium systems.Type: GrantFiled: July 23, 2003Date of Patent: November 6, 2007Assignee: University of DaytonInventors: Andrew Wells Phelps, Jeffrey Allen Sturgill, Joseph Thomas Swartzbaugh
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Patent number: 7255736Abstract: Effect pigments having improved optical properties based on SiO2 flakes coated with one or more layers, where the SiO2 flakes 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.Type: GrantFiled: October 11, 2005Date of Patent: August 14, 2007Assignee: Merck Patent GmbHInventors: Gerhard Pfaff, Doreen Warthe, Johann Dietz, Cornelia Foerderer
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Patent number: 7250080Abstract: An improved process for making an organosilicon compound surface-treated titanium dioxide material, comprising (a) forming a mixture of the titanium dioxide material in water, (b) wet milling the mixture, (c) adjusting the pH of the slurry resulting from step (b) to between about 5.0 and about 8.5, (d) after step (c), removing the titanium dioxide material from the mixture by vacuum or pressure filtration, (e) after step (d), washing the titanium dioxide material so removed, (f) after step (e), converting the washed titanium dioxide material to a fluid dispersion having a pH of from about 3.5 to less than about 7 via addition of a fluidizing agent comprising a water-soluble monoprotic acid, (g) after, or concurrently with, step (f), adding to the resulting dispersion of titanium dioxide material an organosilicon compound, with mixing, and (h) spray drying the dispersion of the washed titanium dioxide material resulting from step (g) to yield a dry titanium dioxide pigment powder.Type: GrantFiled: September 6, 2006Date of Patent: July 31, 2007Assignee: Tronox LLCInventors: Daniel H. Craig, Mark D. Westmeyer
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Patent number: 7169222Abstract: Multilayer interference pigment consisting of a transparent carrier material coated with alternating layers of metal oxides of low and high refractive index, the difference in the refractive indices being at least 0.1, which is obtainable by alternate coating of the transparent carrier material with a metal oxide of high refractive index and with a metal oxide of low refractive index in a wet process by hydrolysis of the corresponding water-soluble metal compounds, separation, drying and, if desired, calcination of the resulting pigment.Type: GrantFiled: July 11, 2005Date of Patent: January 30, 2007Assignee: Merck Patent GmbHInventors: Hans-Dieter Brückner, Andrea Heyland, Christoph Schmidt, Christina Schank, Claudia Seibel
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Patent number: 7160374Abstract: A flaky pigment excellent in leafing properties and in adhesion between pigment particles and a coating (resin) was obtained by coating the surface of a flaky pigment with a coupling agent and a phosphate having a perfluoroalkly group or a silane compound. Accordingly, the flaky pigment is excellent as a pigment for coating or printing ink of which brightness and durability are required.Type: GrantFiled: February 15, 2001Date of Patent: January 9, 2007Assignee: Merck Patent GmbHInventors: Eiji Umehara, Koushiro Kunii
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Patent number: 7135206Abstract: A method for producing nanoscale titanium dioxide particles which are coated with an oxide, a hydroxide or an oxide hydroxide of Al, Ce, Zr and/or Si wherein the enzymatic precipitant system urease/urea is used. Said coated titanium dioxide particles can have an average size of less than 50 nm, the coating providing effective protection against photocatalytic reactions. The coated particles are suitable, in particular, as UV absorbers in a transparent organic matrix.Type: GrantFiled: October 30, 2002Date of Patent: November 14, 2006Assignee: Leibniz-Institut Fuer Neue Materialien Gemeinnuetzige GmbHInventor: Martin Schichtel
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Patent number: 7105467Abstract: The present invention provides nickel catalysts and solvents which are useful in a cross-coupling reaction between an organomagnesium compound and an aromatic ether compound, such as an anisole derivative.Type: GrantFiled: July 8, 2003Date of Patent: September 12, 2006Assignee: Pharmacore, Inc.Inventor: John W. Dankwardt
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Patent number: 7018465Abstract: A spray glaze or opaque composition for coating dental restorations and other surfaces and objects such as hobby ceramics that comprises about 4 to about 50 weight % glaze material, about 5 to about 60 weight % restoration wetting agent, and about 10 to about 90% non CFC propellant. An opaque composition further comprises about 5 to about 30% opaque material.Type: GrantFiled: July 17, 2003Date of Patent: March 28, 2006Assignee: Enamelite, LLCInventors: Phillip G. Pitts, James R. Vinson
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Patent number: 6997982Abstract: The invention relates to a pigment with a metallic luster, comprising a plate-like non-metallic substrate having a thickness lower an 200 nm, which is entirely coated with a metallic layer.Type: GrantFiled: September 27, 2002Date of Patent: February 14, 2006Assignee: Merck Patent GmbHInventors: Gerhard Pfaff, Stephanie Andes, Michael Uhlig
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Patent number: 6984682Abstract: A metallic effect pigment including a metallic, corrosion resistant reflective core of reflectivity from 40% to 80%; having deposited thereupon at least one dielectric coating layer formed of at least one metal oxide, the metal oxide layer having been formed by deposition on the core by hydrolysis of a hydrolyzable metal salt in an strongly acidic aqueous medium, and thereafter full transformation into the oxide by calcination.Type: GrantFiled: March 21, 2002Date of Patent: January 10, 2006Assignee: Ciba Specialty Chemicals CorporationInventors: Jack Polonka, Patrice Bujard, Natacha Bonnard Pillonel, Fritz Herren
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Patent number: 6953504Abstract: A black pigment powder having a low value of magnetization according to the present invention is characterized in that it consists of a composite oxide containing Fe2TiO4 as a main component, wherein the total amount of Fe (II) and Fe (III) to Ti is from 150 to 300 atomic %, in such an amount that the amount of Fe (II) to the total amount of Fe (II) and Fe (III) is 0.50 or more, and that the L value of a coating according to the Hoover-type muller method is 9.0 or less. It is employed to produce a toner composition, a coating composition, a resin composition, a cosmetic material and the like.Type: GrantFiled: December 12, 2003Date of Patent: October 11, 2005Assignee: Titan Kogyo Kabushiki KaishaInventors: Koji Nakata, Koji Kurosaki, Nobuyuki Hashimoto
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Patent number: 6929690Abstract: 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 ?m, which is fully enveloped by a metal layer.Type: GrantFiled: September 27, 2002Date of Patent: August 16, 2005Assignee: Merck Patent GmbHInventors: Reiner Vogt, Gerhard Pfaff, Stephanie Andes, Michael Uhlig, Martin Friz, Katsuhisa Nitta
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Patent number: 6887566Abstract: The present invention provides a cerium oxide particulate composition and a process for preparing a cerium oxide particulate composition comprising aggregates of approximately spherical primary particles of cerium oxide. The method involves preparing a solution of a cerium oxide precursor, aerosolizing the cerium oxide precursor solution, and heating the aerosol to provide the cerium oxide particle composition.Type: GrantFiled: November 17, 2000Date of Patent: May 3, 2005Assignee: Cabot CorporationInventors: Cheng-Hung Hung, Joseph D. Smith, George P. Fotou, Kenneth C. Koehlert
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Patent number: 6884289Abstract: The present invention relates to colored pigments based on multicoated platelet-shaped substrates which are distinguished by the fact that they comprise (A) a coating having a refractive index of n>1.8 and a layer thickness of 20-500 nm, (B) a colorless coating having a refractive index of n?1.8 and a layer thickness of 10-100 nm, (C) a colorless coating having a refractive index of n>1.8 and a layer thickness of 20-500 nm, (D) a covering of absorbent pigment particles having a particle size of 1-500 nm, and optionally (E) an outer protective layer, and to their use in paints, coatings, printing inks, plastics, ceramic materials, glasses, for laser marking, in cosmetic formulations and for the production of pigment preparations and dry preparations.Type: GrantFiled: April 24, 2002Date of Patent: April 26, 2005Assignee: Merck Patent GmbhInventors: Sabine Schoen, Christoph Schmidt
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Patent number: 6875264Abstract: A multilayer effect pigment includes a transparent substrate, a layer of high refractive index material on the substrate, and alternating layers of low refractive index and high refractive index materials on the first layer, the total number of layers being an odd number of at least three, all adjacent layers differing in refractive index by at least about 0.2 and at least one of the layers having an optical thickness which is different from all of the other layers. The resulting multilayer effect pigment is not a quarter-wave stack.Type: GrantFiled: January 17, 2003Date of Patent: April 5, 2005Assignee: Engelhard CorporationInventors: Curtis J. Zimmermann, Daniel Stevenson Fuller
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Patent number: 6858294Abstract: A coating liquid for forming on a substrate surface a hard coat film which exhibits a high refractive index, being excellent in resistance to hot water, weather resistance, scuffing resistance, attrition resistance and dye affinity, and which does not exhibit photochromism, is provided. A coating liquid for forming a hard coat film, comprises a matrix-forming component and composite metal oxide particles of 1 to 100 nm average particle size, composed either of an iron oxide component and a titanium oxide component used at a specified ratio or an iron oxide component, a titanium oxide component and a silica component used at a specified ratio. A substrate coated with a hard coat film is formed by applying the above coating liquid to the substrate surface and effecting drying.Type: GrantFiled: December 14, 1998Date of Patent: February 22, 2005Assignee: Catalyst & Chemicals Industries Co., Ltd.Inventors: Hirokazu Tanaka, Masafumi Hirai, Chiemi Murakami
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Patent number: 6783584Abstract: To provide a high-chromatic flaky pigment with good colorability, and to provide a method for producing the flaky pigment in a simple and inexpensive plant. A high-chromatic flaky pigment of which the entire surface of the flaky substrate coated with a metal oxide having an interference color is further coated with a semi-transparent thin metal film to enhance the interference color of the pigment.Type: GrantFiled: September 18, 2002Date of Patent: August 31, 2004Assignee: Merck Patent GmbHInventor: Norio Takahashi
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Patent number: 6767633Abstract: 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).Type: GrantFiled: October 10, 2002Date of Patent: July 27, 2004Assignee: Merck Patent GmbHInventors: Elke Steudel, Hans-Dieter Brückner, Gerhard Pfaff, Peter Reynders, Christoph Schmidt, Carsten Brabänder, Wolfgang Hechler
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Patent number: 6758893Abstract: A method for the preparation of pigment granules includes mixing at least one pigment selected from the group consisting of iron oxide and chromium oxides with 1-25 wt. % water to form a damp powder. The damp powder is then pressure extruded through at least one die to form granules. The granules are then dried so that the final water content of the granules is less than about 1%, crumble and sieved to form the final product.Type: GrantFiled: June 20, 2002Date of Patent: July 6, 2004Assignee: Elementis Pigments, Inc.Inventors: Hugh Joseph McAulay, George Podolsky, Andrew Morris, Roy Laundon
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Publication number: 20040094068Abstract: The invention relates to a titanium dioxide pigment mixture comprising a pigment having high greying stability (pigment type A) and a pigment having increased SiO2 and Al2O3 content in flaky precipitation (pigment type B). Said mixture provides, for example in paper, a high level of opacity for sufficient greying stability. If necessary, the light-fastness of the paper can be further increased by means of known production-conditioned measures on pigment type B.Type: ApplicationFiled: August 13, 2003Publication date: May 20, 2004Inventors: J?uuml;rgen Bender, Siegfried Blmel, Volker Schmitt, Brigitte Vielhaber-Kirsch
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Patent number: 6719838Abstract: The present invention relates to colored interference pigments based on multicoated, platelet-shaped substrates, which are distinguished in that they comprise (A) a colored coating having a refractive index of n>1.8, (B) a colorless coating having a refractive index of n>1.8, (C) a colorless coating having a refractive index of n≦1.8, (D) a colorless coating having a refractive index of n>1.8, and optionally (E) an outer protective layer, and to their use in paints, surface coatings, printing inks, plastics, ceramic materials, glasses, for laser marking, in cosmetic formulations and for the production of pigment preparations and dry preparations.Type: GrantFiled: October 24, 2002Date of Patent: April 13, 2004Assignee: Merck Patent GmbHInventors: Lilia Heider, Manuela Loch, Nicole Schupp, Helge Kniess
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Patent number: 6706109Abstract: Optically variable interference pigments are composed of platelets of at least partly core-free titanium dioxide-coated substrate of about 1-25 mm particle size and an interference thickness of about 5-600 nm which have an oxide coating thereon.Type: GrantFiled: May 14, 2002Date of Patent: March 16, 2004Assignee: Engelhard CorporationInventor: Carmine V. DeLuca, Jr.
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Patent number: 6692561Abstract: The invention relates to intensely colored interference pigments based on multi-layered plate-like substrates with at least two sequences of layers consisting of (A) a colorless layer with a refraction index n≦1,8; (B) a high-index layer consisting of a mixture of TiO2 and Fe2O3 in a ratio of 1:0.1 to 1:5 and optionally, one or more metal oxides in quantities of to layer (B); and optionally (C) an outer protective layer.Type: GrantFiled: September 5, 2002Date of Patent: February 17, 2004Assignee: Merck Patent Gesellschaft mit beschränkter HaftungInventors: Sabine Schoen, Klaus Bernhardt, Christoph Schmidt
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Patent number: 6689205Abstract: Multilayer interference pigment consisting of a transparent carrier material coated with alternating layers of metal oxides of low and high refractive index, the difference in the refractive indices being at least 0.1, which is obtainable by alternate coating of the transparent carrier material with a metal oxide of high refractive index and with a metal oxide of low refractive index in a wet process by hydrolysis of the corresponding water-soluble metal compounds, separation, drying and, if desired, calcination of the resulting pigment.Type: GrantFiled: October 24, 2000Date of Patent: February 10, 2004Assignee: Merck Patent GesellschaftInventors: Hans-Dieter Brückner, Andrea Heyland, Christoph Schmidt, Christina Schank, Claudia Seibel
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Patent number: 6686042Abstract: Pigment flakes are provided which can be used to produce colorant compositions having color shifting properties. The pigment flakes can have a symmetrical coating structure on opposing sides of a reflector layer, can have an asymmetrical coating structure with all of the layers on one side of the reflector layer, or can be formed with encapsulating coatings around a reflector layer. The coating structure includes a selective absorbing layer on one or more sides of the reflector layer, a dielectric layer on the selective absorbing layer, and an absorber layer on the dielectric layer. The pigment flakes exhibit a discrete color shift such that the pigment flakes have a first color at a first angle of incident light or viewing and a second color different from the first color at a second angle of incident light or viewing. The pigment flakes can be interspersed into liquid media such as paints or inks for subsequent application to objects or papers.Type: GrantFiled: September 22, 2000Date of Patent: February 3, 2004Assignee: Flex Products, Inc.Inventor: Charlotte R. LeGallee
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Patent number: 6656261Abstract: The present invention provides titanium dioxide pigments with improved gloss and/or durability. The titanium dioxide pigments are made by treating titanium dioxide with a plurality of metal salts under conditions suitable to form the titanium dioxide pigment having improved gloss and/or durability, wherein at least one metal salt is capable of providing a monovalent anion. Preferred pigments of the present invention are substantially-sulfate free.Type: GrantFiled: March 9, 2001Date of Patent: December 2, 2003Assignee: Millennium Inorganic Chemicals, Inc.Inventors: Brian Tear, John Stratton, Robert Burniston
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Publication number: 20030213409Abstract: Optically variable interference pigments are composed of platelets of at least partly core-free titanium dioxide-coated substrate of about 1-25 mm particle size and an interference thickness of about 5-600 nm which have an oxide coating thereon.Type: ApplicationFiled: May 14, 2002Publication date: November 20, 2003Inventor: Carmine V. DeLuca
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Patent number: 6648956Abstract: The invention relates to a nondusting, solvent-containing homogeneous pigment preparation that includes ≧70% by weight of one or more effect pigments 0.1-30% by weight of an organic solvent or solvent mixture having an evaporation number (EN) of 10 to 100 and a surface tension (ST) of ≦35 mN/m and optionally 0-5% by weight of a surface-active substance.Type: GrantFiled: November 20, 2000Date of Patent: November 18, 2003Assignee: Merck Patent Gesellschaft mit beschraenkter HaftungInventors: Wolfgang Hechler, Gerhard Herget, Brigitte Husseini, Sabine Schoen
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Patent number: 6648957Abstract: Multilayer pearl lustre pigment on the basis of a platelet-shaped substrate comprising a material of low refractive index in the range from 1.35 to 1.8, which comprises at least (i) one first layer comprising a material having a refractive index of more than 1.8, (ii) optionally, a second layer comprising a material of low refractive index in the range from 1.35 to 1.8, (iii) a semitransparent metal layer which is applied to the substrate or to the layers (i) or (ii), and (iv) if desired, an aftercoating, the substrate being platelet-shaped silicon dioxide, aluminium oxide, boron oxide or magnesium fluoride.Type: GrantFiled: December 4, 2001Date of Patent: November 18, 2003Assignee: Merck Patent GmbHInventors: Stephanie Andes, Gerald Fuchs-Pohl, Gerhard Pfaff
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Patent number: 6645286Abstract: The present invention is concerned with soft-magnetic iron effect pigments with metallic luster, which are produced by grinding reductively treated carbonyl iron powder, and which are passivated either during grinding or subsequent to the grinding. The products find application in the decorative and functional fields in paint and lacquer coatings, coloring of plastics, in printing, cosmetics, and glass and ceramics.Type: GrantFiled: March 25, 2002Date of Patent: November 11, 2003Assignee: Eckart GmbH & Co. KGInventors: Werner Ostertag, Stefan Trummer, Frank Henglein, Klaus Greiwe
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Publication number: 20030181329Abstract: A method of producing composite particles of titanium dioxide and a compound inactive as a photocatalyst, comprising the steps of preparing a water based slurry of pH 3 to 5 comprising titanium dioxide, preparing a water based solution comprising a compound inactive as a photocatalyst, and reacting the slurry and the water based solution together at a pH within a range from 4 to 10 is provided, together with highly active photocatalyst particles produced using such a method, and potential uses of such photocatalyst particles.Type: ApplicationFiled: December 19, 2002Publication date: September 25, 2003Applicant: SHOWA DENKO K.K.Inventors: Jun Tanaka, Masayuki Sanbayashi, Yoshinori Ueyoshi
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Patent number: 6620233Abstract: Goniochromatic luster pigments are based on titanium dioxide-coated silicatic platelets which have been heated in a reducing atmosphere and which comprise at least one layer packet comprising A) a colorless coating having a refractive index n≦1.8 and B) a coating which has a refractive index n≧2.0, which includes iron(III) oxide and which selectively absorbs visible light.Type: GrantFiled: April 23, 2002Date of Patent: September 16, 2003Assignee: BASF AktiengesellschaftInventors: Oliver Seeger, Raimund Schmid, Norbert Mronga, Jörg Adel