Iron Or Bismuth Compound Containing (fe Or Bi) Patents (Class 106/418)
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Patent number: 7578879Abstract: The present invention relates to surface-modified effect pigments based on flake-form substrates which are distinguished by the fact that they are sheathed with one or more layers of immobilized LCST and/or UCST polymers. The invention furthermore relates to a process for the production of the surface-modified effect pigments and to the use thereof in surface coatings, water-borne coatings, powder coatings, paints, printing inks, security printing inks, plastics, concrete, in cosmetic formulations, in agricultural sheeting and tarpaulins, for the laser marking of papers and plastics, as light protection, as pigment for corrosion protection and for the preparation of pigment compositions and dry preparations.Type: GrantFiled: September 4, 2003Date of Patent: August 25, 2009Assignee: Merck Patent GmbHInventors: Adalbert Huber, Marc Entenmann, Thadeus Schauer
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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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Patent number: 7470318Abstract: A pearlescent pigment comprises (a) synthetic mica substrate, (b) calcined ferrite coating on the substrate, and (c) an outer layer or treatment wherein said outer layer or treatment was added to the calcined ferrite coated synthetic mica in water. The pearlescent pigment may be used in exterior applications such as automotive paint systems.Type: GrantFiled: July 21, 2007Date of Patent: December 30, 2008Assignee: BASF CorporationInventors: Paul Cao, Carolynn Lavallee, Steven Jones, Debbie Cacace
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Publication number: 20080305184Abstract: The invention relates to a pigment mixture consisting of at least two constituents, constituent A being uncoated, monocoated or multicoated glass lamellae, and constituent B being nacreous pigments based on phyllosilicates, SiO2 lamellae, Fe2O3 lamellae or Al2O3 lamellae. The invention also relates to the use of said pigment mixture, inter alia, in paints, dyes, especially printing inks, plastics, powder paints, pastes and cosmetic formulations.Type: ApplicationFiled: June 30, 2005Publication date: December 11, 2008Inventors: Dieter Heinz, Ralf Anselmann, Klaus Boehm, Sabine Schoen
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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: 7396587Abstract: This invention relates to a single- or multilayer, oriented film formed from polyester and at least one inorganic black pigment. The inventive films include at least one layer which has, alongside polyester, an amount of from 0.5 to 75% by weight of particles incorporating iron oxide as black pigment.Type: GrantFiled: April 18, 2006Date of Patent: July 8, 2008Assignee: Mitsubishi Polyester Film GmbHInventors: Holger Kliesch, Thorsten Kiehne, Franz Hora, Ingo Fischer
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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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Publication number: 20080110371Abstract: 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: June 20, 2007Publication date: May 15, 2008Applicant: Sun Chemical CorporationInventors: Aaron M. Hollman, Stephane Nicolas, Philippe Scottland, Marguerite Debacker, Aurelie Antonowicz, Hai Hui Lin
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Patent number: 7303622Abstract: The present invention relates to lustrous black interference pigments based on a substrate mixture, characterised in that it has (A) a coating of Fe3O4 (B) a colorless coating consisting of one or more layers each having a refractive index of n?1.8, (C) optionally a coating with an absorbent, high-refractive-index material which only covers part of the surface, and optionally (D) an outer protective layer, and to the use thereof in paints, coatings, powder coatings, printing inks, plastics, ceramic materials, glasses, for the laser marking of papers and plastics, in cosmetic formulations and for the preparation of pigment compositions and dry preparations.Type: GrantFiled: October 1, 2004Date of Patent: December 4, 2007Assignee: Merck Patent Gesellschaft mit beschrankter HaftungInventors: Manuela Loch, Nicole Schupp, Ralf Anselmann, Lilia Heider
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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: 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: 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: 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: 6858072Abstract: 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.Type: GrantFiled: January 31, 2001Date of Patent: February 22, 2005Assignee: Merck Patent GmbHInventors: Bangyin Li, Katsuhisa Nitta
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Patent number: 6849115Abstract: A method of manufacturing aluminum-substituted hematite represented by ?-(Fe1-xAlx)2O3 where x=0.01 to 0.15, by mixing an iron compound and an aluminum compound such that an atomic ratio of Fe to Al falls within the range of 99:1 to 85:15, adding citric acid and ethylene glycol to the mixture of the iron compound and aluminum compound to produce a gel, and pyrolyzing the gel, followed by calcining the pyrolyzed product.Type: GrantFiled: July 2, 2003Date of Patent: February 1, 2005Assignee: President of Okayama UniversityInventors: Jun Takada, Tatsuo Fujii, Makoto Nakanishi
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Patent number: 6821333Abstract: A color effect material is described as composed of a plurality of encapsulated substrate platelets in which each platelet is encapsulated with a highly reflective layer which acts as a reflector to light directed thereon and a spacer pigment layer which is selectively transparent to light directed thereon.Type: GrantFiled: December 13, 2002Date of Patent: November 23, 2004Assignee: Engelhard CorporationInventors: Curtis J. Zimmermann, James D. Christie, Vivian K. Doxey, Daniel Stevenson Fuller
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Patent number: 6800125Abstract: A color effect material is described as composed of a plurality of encapsulated substrate platelets in which each platelet is encapsulated with a highly reflective silver layer which acts as a reflector to light directed thereon and an iron oxide layer.Type: GrantFiled: December 13, 2002Date of Patent: October 5, 2004Assignee: Engelhard CorporationInventors: Curtis J. Zimmermann, Steven A. Jones
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Patent number: 6794037Abstract: A color effect material is described as composed of a plurality of encapsulated substrate platelets in which each platelet is encapsulated with a highly reflective silver layer which acts as a reflector to light directed thereon, a spacer layer which is selectively transparent to light directed thereon, and an iron oxide layer on the spacer layer.Type: GrantFiled: December 13, 2002Date of Patent: September 21, 2004Assignee: Engelhard CorporationInventors: Curtis J. Zimmermann, Steven A. Jones
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Publication number: 20040177788Abstract: Interference pigments having a mass tone based on multicoated flake-form substrates, which have on the substrate:Type: ApplicationFiled: March 10, 2004Publication date: September 16, 2004Inventors: Norbert Rick, Lilia Heider, Manuela Loch, Nicole Schupp, Ralf Anselmann
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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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Publication number: 20040112252Abstract: A color effect material is described as composed of a plurality of encapsulated substrate platelets in which each platelet is encapsulated with a highly reflective layer which acts as a reflector to light directed thereon and a spacer pigment layer which is selectively transparent to light directed thereon.Type: ApplicationFiled: December 13, 2002Publication date: June 17, 2004Inventors: Curtis J. Zimmermann, James D. Christie, Vivian K. Doxey, Daniel Stevenson Fuller
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Publication number: 20040112253Abstract: A color effect material is described as composed of a plurality of encapsulated substrate platelets in which each platelet is encapsulated with a highly reflective silver layer which acts as a reflector to light directed thereon and an iron oxide layer.Type: ApplicationFiled: December 13, 2002Publication date: June 17, 2004Inventors: Curtis J. Zimmermann, Steven A. Jones
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Patent number: 6743285Abstract: The present invention relates to pigment mixtures in the form of a dispersion or powder, consisting of at least two components, where component A comprises coated or uncoated BiOCl pigments in the form of a powder or dispersion, and component B comprises pearlescent pigments, platelet-shaped, needle-shaped or spherical colorants and/or fillers, and to the use thereof in paints, coatings, printing inks, plastics, powder coatings, plastic films, for the finishing of seed and in particular in cosmetic formulations.Type: GrantFiled: February 28, 2002Date of Patent: June 1, 2004Assignee: Merck Patent GmbHInventors: Ralf Anselmann, Uta Hillgärtner, Sabine Schoen
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Patent number: 6719837Abstract: 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.Type: GrantFiled: January 31, 2003Date of Patent: April 13, 2004Assignee: Merck Patent Gesellschaft mit beschränkter HaftungInventors: Stéphane Bertaux, Peter Reynders, Jens-Uwe Wichmann, Eberhard Schweda
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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: 6680121Abstract: The present invention relates to additive, pigment or colorant materials which may be used for laser marking. The materials comprise oxides of bismuth and at least one additional metal. Preferred laser-markable bismuth-containing oxide compounds are of the formula BixMyOz, where M is at least one metal selected from Zn, Ti, Fe, Cu, Al, Zr, P, Sn, Sr, Si, Y, Nb, La, Ta, Pr, Ca, Mg, Mo, W, Sb, Cr, Ba and Ce, x is from about 0.3 to about 70, y is from about 0.05 to about 8, and z is from about 1 to about 100. The bismuth-containing material may be dispersed in a substrate which is subsequently irradiated by a laser to provide a contrasting mark in the irradiated region.Type: GrantFiled: December 18, 2002Date of Patent: January 20, 2004Assignee: DMC2 Degussa Metals Catalysts Cerdec AGInventors: George Emil Sakoske, Joseph E. Sarver
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Patent number: 6676741Abstract: Methods and apparatus are provided for uniformly depositing a coating material from a vaporization source onto a powdered substrate material to form a thin coalescence film of the coating material that smoothly replicates the surface microstructure of the substrate material. The coating material is uniformly deposited on the substrate material to form optical interference pigment particles. The thin film enhances the hiding power and color gamut of the substrate material. Physical vapor deposition process are used for depositing the film on the substrate material. The apparatus and systems employed in forming the coated particles utilize vibrating bed coaters, vibrating conveyor coaters, or coating towers. These allow the powdered substrate material to be uniformly exposed to the coating material vapor during the coating process.Type: GrantFiled: February 20, 2003Date of Patent: January 13, 2004Assignee: Flex Products, Inc.Inventors: Roger W. Phillips, Vladimir Raksha
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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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Patent number: 6638353Abstract: The invention relates to a non-dusting homogeneous pigment preparation notable in that it comprises at least 40% by weight of one or more effect pigments, from 0.5 to 50% by weight of water and/or an organic solvent or solvent mixture and from 0.5 to 59.5% by weight of a styrene-modified maleate resin having an acid number >90 mg KOH/g, and to its use in particular to produce dry preparations.Type: GrantFiled: April 1, 2002Date of Patent: October 28, 2003Assignee: Merck Patent GmbHInventors: Thomas Rathschlag, Carsten Griessmann
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Patent number: 6630018Abstract: The invention relates to a platelet-shaped pigment having high luster and high covering power or high transparency, consisting of a transparent, inorganic, platelet-shaped matrix which can contain an additional constituent, characterized in that the additional constituent is a soluble or insoluble colorant and in that the matrix is coated at least on one side with one or more thin, transparent or semi-transparent reflective layers of metal oxides or metals to achieve the luster.Type: GrantFiled: April 15, 1994Date of Patent: October 7, 2003Assignee: Merck Patent Gesellschaft mit beschränkter HaftungInventors: Gerd Bauer, Karl Osterried, Christoph Schmidt, Reiner Vogt, Helge-Bettina Kniess, Michael Uhlig, Norbert Schül, Günther Brenner
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Publication number: 20030177949Abstract: Methods and apparatus are provided for uniformly depositing a coating material from a vaporization source onto a powdered substrate material to form a thin coalescence film of the coating material that smoothly replicates the surface microstructure of the substrate material. The coating material is uniformly deposited on the substrate material to form optical interference pigment particles. The thin film enhances the hiding power and color gamut of the substrate material. Physical vapor deposition process are used for depositing the film on the substrate material. The apparatus and systems employed in forming the coated particles utilize vibrating bed coaters, vibrating conveyor coaters, or coating towers. These allow the powdered substrate material to be uniformly exposed to the coating material vapor during the coating process.Type: ApplicationFiled: February 20, 2003Publication date: September 25, 2003Applicant: Flex Products, Inc.Inventors: Roger W. Phillips, Vladimir Raksha
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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
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Patent number: 6596070Abstract: The present invention relates to interference pigments on the basis of multiply coated, platelet-shaped substrates which comprise at least one layer sequence comprising (A) a coating having a refractive index n≧2.0, (B) a colorless coating having a refractive index n≦1.8, and (C) a nonabsorbing coating of high refractive index, and, if desired, (D) an external protective layer.Type: GrantFiled: April 17, 2000Date of Patent: July 22, 2003Assignee: Merck Patent GesellschaftInventors: Christoph Schmidt, Gerhard Pfaff, Christina Schank, Sabine Schoen
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Patent number: 6596072Abstract: Pigment-containing granules for use in coloring cement. The granules comprise at least one pigment selected from the group consisting of maganese oxide and iron oxide and a binder. The binder is a hydrophilic clay, and is preferably pozzolan.Type: GrantFiled: March 18, 2002Date of Patent: July 22, 2003Assignee: Hamburger Color CompanyInventors: Jack Dunnous, William J. Yocum
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Patent number: 6596061Abstract: Inorganic anti-corrosive pigments consist of surface-coated solids having a grain size of 0.1 to 75 &mgr;m. In order to improve the resistance of the paints and coatings containing such pigments, firstly Mn3(PO4)2 and secondly aluminium oxides and/or aluminium hydroxides are precipitated onto the solids.Type: GrantFiled: May 4, 2001Date of Patent: July 22, 2003Assignee: Metallgesellschaft AktiengesellschaftInventor: Thomas Rentschler
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Patent number: 6579355Abstract: The present invention relates to an interference pigment based on multiply-coated platelet-shaped substrates, comprising at least one layer sequence of (A) a high refractive index coating comprising a mixture of TiO2 and Fe2O3 in a ratio of about 10:1 to about 3:1 and optionally one or more metal oxides in amounts of ≲ about 20% by weight based on the layer (A), (B) a colorless coating having a refractive index n ≲ about 1.8, and optionally (C) an outer protective layer.Type: GrantFiled: February 15, 2000Date of Patent: June 17, 2003Assignee: Merck Patent Gesellschaft mit Beschraenkter HaftungInventors: Christoph Schmidt, Klaus Bernhardt, Dieter Heinz
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Patent number: 6572695Abstract: A bismuth oxychloride effect pigment has a carbon black particulate at about the surface of the crystals of the bismuth oxychloride. The pigment is prepared by, for instance, growing the bismuth oxychloride crystals, and adding the particulate before the hydrolysis is complete.Type: GrantFiled: August 19, 2002Date of Patent: June 3, 2003Assignee: Engelhard CorporationInventor: Paul B. Cao
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Patent number: 6551397Abstract: The present invention relates to a pigment preparation comprising BiOCl pigments, one or more luster pigments and spherical particles, and to the use thereof in printing inks, security printing inks, surface coatings, paints, plastics and in cosmetic formulations.Type: GrantFiled: April 29, 2002Date of Patent: April 22, 2003Assignee: Merck Patent GmbHInventors: Joachim Weitzel, Wolfgang Hechler
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Patent number: 6547870Abstract: The invention relates to a non-dusting, homogeneous pigment preparation, comprising ≧40% by weight of one or more effect pigments, 0.5-60% by weight of a polyalkylene glycol and/or one or more polyalkylene glycol derivatives, 0-10% by weight of a redispersing auxiliary, 0-40% by weight of water or an organic solvent or solvent mixture, 0-40% by weight of at least one further hydroxyl-rich resin, and to its use as a precursor for printing inks.Type: GrantFiled: December 13, 2000Date of Patent: April 15, 2003Assignee: Merck Patent Gesellschaft mit beschränkter HaftungInventors: Carsten Griessmann, Gerhard Herget
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Patent number: 6544327Abstract: The invention relates to a non-dusting homogeneous pigment preparation which is notable in that it comprises at least 40% by weight of one or more effect pigments, from 0.5 to 60% by weight of an aldehyde resin and/or ketonic resin and from 0.1 to 10% by weight of a redispersant.Type: GrantFiled: September 14, 2000Date of Patent: April 8, 2003Assignee: Merck Patent GmbHInventors: Carsten Griessmann, Wolfgang Hechler, Gerhard Herget
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Patent number: 6533858Abstract: Non-bleeding, non-agglomerated, lustrous colored combination pigments constitute a platy substrate and absorption colorant bound thereto with metal hydroxides and one or more hydrolyzed silane coupling agents.Type: GrantFiled: October 10, 2000Date of Patent: March 18, 2003Assignee: Engelhard CorporationInventors: Deborah Cacace, Daniel S. Fuller
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Patent number: 6533857Abstract: Luster pigments based on multiply coated reflecting platelet-shaped substrates and comprising at least one layer packet comprising A) a low refractive coating which selectively absorbs visible light and B) a reflective coating which is at least partially transparent to visible light and also, if desired, C) an outer protective layer.Type: GrantFiled: February 28, 2002Date of Patent: March 18, 2003Assignee: BASF AktiengesellschaftInventors: Raimund Schmid, Arno Böhm, Oliver Seeger, Norbert Mronga, Thorsten Clemens