Mica, Shell, Scale, Platelet, Or Lamellate Patents (Class 106/415)
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Publication number: 20040139889Abstract: 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: ApplicationFiled: January 17, 2003Publication date: July 22, 2004Inventors: Curtis J. Zimmermann, Daniel Stevenson Fuller
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Publication number: 20040139888Abstract: Printing inks and pastes are disclosed that comprise of nanofillers with domain size less than 100 nanometers thereby exhibiting quantum confinement effects. The printing formulations comprise of nanowhiskers, nanorods, fibers, plates and powders. These printing formulations are useful for preparing nanoelectronics, electrodes and nanotechnology-enabled devices and products. The nanofillers composition taught include inorganic, metallic, organic, oxides, borides, nitrides, carbides, halides, sulfides, alloys and chalcogenides.Type: ApplicationFiled: October 6, 2003Publication date: July 22, 2004Inventors: Tapesh Yadav, Clayton Kostelecky
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Publication number: 20040134385Abstract: The present invention relates to effect pigments based on thin glass flakes and to a method for the production of such pigments. The resulting pigment can be used in any application for which pearlescent pigments have been heretofore used such as, for example, in plastics, paints, inks, cosmetic formulations, coatings including solvent or waterborne automotive paint systems, powder coatings, inks and agriculture foils.Type: ApplicationFiled: November 10, 2003Publication date: July 15, 2004Inventors: Ralf Anselmann, Klaus Ambrosius, Marcus Mathias
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Publication number: 20040123778Abstract: An effect pigment is constituted by coated laminar platelets in which the platelets are a mixture of different platelet materials, one of which is platy glass or platy aluminum oxide, and in which the pigment exhibits visual homogeneity.Type: ApplicationFiled: December 31, 2002Publication date: July 1, 2004Inventor: Frank Bagala
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Publication number: 20040127604Abstract: A structurally coated silica can be prepared by spraying and mixing a pyrogenic silica with water and a coating agent in a suitable mixing vessel, then milling and then conditioning the product.Type: ApplicationFiled: December 11, 2003Publication date: July 1, 2004Applicant: DeGUSSA AGInventors: Jurgen Meyer, Kurt Spitznagel, Hans-Dieter Christian
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Publication number: 20040123779Abstract: An effect pigment is constituted by coated laminar platelets in which the platelets are a mixture of different platelet materials, one of which is platy glass or platy aluminum oxide, and in which the pigment exhibits visual homogeneity.Type: ApplicationFiled: December 17, 2003Publication date: July 1, 2004Inventors: Frank Bagala, Curtis J. Zimmermann
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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: 6749676Abstract: Erasable inks are provided for use in a writing instruments. In one aspect, the inks include a solvent, and, dispersed in the solvent as a colorant, a pigment having a flake-like morphology, the ink being substantially free of other colorants.Type: GrantFiled: July 3, 2001Date of Patent: June 15, 2004Assignee: Berol CorporationInventors: Jean L. Spencer, Pawel Czubarow
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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: 6740316Abstract: The invention relates to an anhydrous pigmentary paste comprising: from 20 to 32% by volume of at least one solid pigment, with respect to the total volume of the pigmentary paste, a pigment dispersion medium containing at least one anhydrous solvent selected from the hydrocarbon oils and the silicone oils, and a dispersing agent containing at least one imide or succinimide group linked by a covalent bond to a polymer chain compatible with the dispersion medium.Type: GrantFiled: October 15, 2002Date of Patent: May 25, 2004Assignee: L'OrealInventors: Florence Tournilhac, Rolf Klucker
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Publication number: 20040069187Abstract: 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 gorup 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: ApplicationFiled: August 13, 2003Publication date: April 15, 2004Inventors: Eiji Umehara, Koushiro Kunii
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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: 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: 6702885Abstract: The present invention relates to a pigment preparation comprising a mixture of coated and/or uncoated SiO2 flakes, one or more special-effect pigments, and a phosphate derivative, and to the use thereof, especially in printing inks.Type: GrantFiled: October 19, 2001Date of Patent: March 9, 2004Assignee: Merck Patent Gesellschaft Mit BeschrankterInventors: Sabine Schoen, Reiner Vogt, Norbert Schül, Karl Osterried, Gerhard Herget
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Patent number: 6695905Abstract: The invention describes luminescent optically variable pigments (OVP), methods for obtaining such pigments, as well as the use of such pigments as security elements in inks, coatings and articles. The luminescence centers are preferably incorporated into the dielectric material of the OVP's optical<i>Fabry-Perot</i> resonance cavity, allowing for the machine-discrimination of luminescent OVP from simple mixtures of luminescents and non-luminescent OVP.Type: GrantFiled: August 14, 2002Date of Patent: February 24, 2004Assignee: SICPA Holding S.A.Inventors: Olivier Rozumek, Edgar Müller
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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: 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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Publication number: 20040003758Abstract: The invention relates to a multilayered interference pigment consisting of a transparent carrier material which is coated with alternating layers of colourless, non-absorbent metal oxides having a high and a low refractive index, the difference between the refractive indices being at least 0.1. The inventive pigment can be obtained by alternately coating the transparent carrier material with a metal oxide having a high refractive index and a metal oxide having a low refractive index according to the wet method, by hydrolysing the corresponding water-soluble, inorganic metal compounds, and separating, drying and optionally calcinating the obtained pigment.Type: ApplicationFiled: April 9, 2003Publication date: January 8, 2004Inventors: Hans-Dieter Bruckner, Matthias Kuntz
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Patent number: 6656259Abstract: The invention relates to multilayered interference pigments which comprise a platelet-shaped substrate of silicon dioxide which is coated alternately with layers of light-transparent materials having refractive indices of n>1.8 and layers of light-transparent materials having refractive indices of n≦1.8, where the optical thickness of the platelet-shaped substrate and the optical thickness of the individual layers of light-transparent materials having refractive indices of n≦1.8 are the same.Type: GrantFiled: August 2, 2002Date of Patent: December 2, 2003Assignee: Merck Patent Gesellschaft mit beschraenkter HaftungInventors: Gerhard Pfaff, Helge Kniess, Peter Reynders
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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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Publication number: 20030209169Abstract: The present invention relates to multilayer pigments based on platelet-shaped metal substrates coated with two or more metal oxide layers by a one-pot process in an exclusively aqueous medium. The invention further relates to the use of the multilayer pigments in paints, varnishes, printing inks, including security printing inks, plastics, ceramic materials and cosmetic and for the laser formulations marking of plastics.Type: ApplicationFiled: June 4, 2003Publication date: November 13, 2003Applicant: MERCK PATENT GESELLSCHAFT MIT BESCHRANKTER HAFTUNGInventors: Stephanie Andes, Sabine George, Margarete Herbski, Peter Reynders, Reiner Vogt, Johann Dietz, Helge Kniess, Elke Steudel
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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: 20030205170Abstract: The present invention relates to silver-colored luster pigments based on multiply coated platelet-shaped substrates, which has at least one layer sequence of TiO2, a colorless coating and another TiO2 layer. The pigment can optionally have an outer protective layer. These luster pigments are useful and to the use thereof in paints, coatings, printing inks, including security printing inks, plastics, ceramic materials, glasses, cosmetic formulations and for producing pigment preparations and dry product forms such as granules, chips, pellets and briquettes.Type: ApplicationFiled: April 21, 2003Publication date: November 6, 2003Applicant: Merck Patent GmbHInventors: Christoph Schmidt, Andrea Heyland, Claudia Fornoff, Hans-Dieter Bruckner
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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: 6632275Abstract: The present invention relates to pigment mixtures consisting of at least two components, component A being Sio2 flakes coated with one or more metal oxides and/or metals and component B being special-effect pigments, and to their use in varnishes, paints, printing inks, masterbatches, plastics and cosmetic formulations.Type: GrantFiled: November 28, 2000Date of Patent: October 14, 2003Assignee: Merck Patent Gesellschaft mit beschränkter HaftungInventors: Sabine Schoen, Reiner Vogt, Norbert Schül, Karl Osterried, Johann Munz
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Patent number: 6632276Abstract: The invention relates to electrically conductive pigments which have, as conductive layer on a substrate, a tin oxide layer doped with phosphorus.Type: GrantFiled: November 28, 1997Date of Patent: October 14, 2003Assignee: Merck Patent Gesellschaft mit beschrankter HaftungInventor: Reiner Vogt
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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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Patent number: 6626989Abstract: A pearlescent pigment comprising substrate particles having an adherent layer of rutile titanium dioxide thereon is prepared by effecting the deposition of hydrous titanium dioxide on the substrate particles after contacting the particles at elevated pH with titanium tetrachloride.Type: GrantFiled: May 16, 2002Date of Patent: September 30, 2003Assignee: Engelhard CorporationInventors: Carmine V. DeLuca, Jr., Louis R. Cerce, Jr.
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Publication number: 20030177950Abstract: The present invention relates to pigment mixtures consisting of at least two components, component A being SiO2 flakes coated with one or more metal oxides and/or metals and component B being special-effect pigments, and to their use in varnishes, paints, printing inks, masterbatches, plastics and cosmetic formulations.Type: ApplicationFiled: March 24, 2003Publication date: September 25, 2003Applicant: Merck Patent Gesellschaft mit beschrankter HaftungInventors: Sabine Schoen, Reiner Vogt, Norbert Schul, Karl Osterried, Johann Munz
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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: 6616745Abstract: A metal oxide-coated mica pearlescent pigment having a coating of copper chromite thereon is provided.Type: GrantFiled: July 17, 2002Date of Patent: September 9, 2003Assignee: Engelhard CorporationInventors: Samuel F. Narvarti, Mark E. Gall, Thomas V. Edwards, Frank A. Mazzella, William L. Howell, Jr.
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Publication number: 20030159621Abstract: The present invention concerns a composition based on a rare earth sulphide with improved stability, a process for its preparation and to use as a colouring pigment.Type: ApplicationFiled: March 19, 2003Publication date: August 28, 2003Inventor: Franck Fajardie
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Patent number: 6605146Abstract: Systems and methods of making and using fine particle materials in pigment blends and for using the aforementioned pigment blends in paint, coating, or coloring compositions are provided. This invention further provides systems and methods of enhancing the visual appearance of a variety of substrates by introducing a paint, coating, or coloring composition to the substrate. The fine particle materials of the present invention have a substantially random geometric shape, a particle size less than about 100 microns, and help provide both functional and visual enhancing properties to compositions and substrates containing these fine particle materials.Type: GrantFiled: July 16, 2002Date of Patent: August 12, 2003Assignee: Ameritech Holding CorporationInventors: Guido Greco, Vincent Pernice, Barry E. Scheetz
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Publication number: 20030147819Abstract: A cosmetic body pigment having a good skin feel, no blue color, a high soft focusing effect (low viewing angle dependency of reflected light intensity), a natural color tone against the skin, and a moderate hiding power (wrinkle hiding effect) is provided. The cosmetic body pigment is characterized in that TiO2 fine particles are deposited separately with form of mono layer on the surface of a thin-platelet like substrate.Type: ApplicationFiled: January 22, 2003Publication date: August 7, 2003Applicant: Merck Patent GmbHInventor: Yukitaka Watanabe
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Patent number: 6602340Abstract: The invention relates to a transparent medium comprising pearl lustre pigments having angle-selective reflection and/or transmission properties and to the use thereof, especially in transparent thermal insulation systems (TIMs).Type: GrantFiled: June 19, 2000Date of Patent: August 5, 2003Assignee: Merck Patent GmbHInventors: Christina Schank, Gerhard Pfaff, Alexandra Brownfield, Joachim Weitzel, Wolfgang Hechler
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Patent number: 6599355Abstract: The invention relates to interference pigments with a great color strength that are based on multicoated platelet-shaped substrates that have at least one series of layers from (A) a highly refractive coating that consists of a mixture of TiO2 and Fe2O3 in ratio of 1:0.1 to 1:5 and optionally one or more metal oxides in amounts of ≦20% by weight based on layer (A), (B) a colorless coating with a refractive index n≦1.8, (C) a colorless coating with a refractive index of n 1.8, (D) an absorptive coating with a refractive index of n 1.8, and optionally (E) an outer protective layer.Type: GrantFiled: April 26, 2002Date of Patent: July 29, 2003Assignee: Merck Patent GmbHInventors: Christoph Schmidt, Klaus Bernhardt, Sabine Schoen, Dieter Heinz
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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: 6596069Abstract: A glittering paint, not requiring formation of primer layer and/or clear top coat layer includes a coated film forming polymer, a glittering pigment comprising inorganic powder and a solvent, wherein the coated film forming polymer comprising a pigment carrying polymer, wherein the pigment carrying polymer has a weight average molecular weight (Mw) of at least 50,000 and a refractive index nD of at least 1.48 as measured by an Abbe refractometer, the coated film forming polymer has an entire weight average molecular weight (Mw) of at least 50,000, the inorganic powder has an aspect ration of particle length or diameter to particle thickness of at least 50, and the glittering pigment content (PWC) in the coated film is 15 wt % or less.Type: GrantFiled: February 26, 2001Date of Patent: July 22, 2003Assignees: Toyoda Gosei Co., Ltd., Cashew Co., Ltd.Inventors: Takayasu Ido, Hiroshi Watarai, Yasuhiko Ogisu, Kenjiro Arai, Kunio Kobiyama, Tsuyoshi Bekki
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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: 6589331Abstract: The present invention deals with metal oxide coated, flake shaped soft iron pigments. The characteristic feature is a reflector substrate, which is produced by deformation of reduced carbonyl iron powder. The pigments are colorful, display metallic luster and a high magnetic permeability. They can be oriented in the medium by means of an external magnetic field. The novel pigments find use in the decorative and/or functional field, particularly in lacquers, paints, plastics, in printing, in glass, ceramics and in cosmetics.Type: GrantFiled: March 25, 2002Date of Patent: July 8, 2003Assignee: Eckart GmbH & Co. KGInventors: Werner Ostertag, Stefan Trummer, Frank Henglein, Klaus Greiwe
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Patent number: 6582507Abstract: A bismuth oxychloride effect pigment has a zinc oxide or microfine titanium dioxide 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 24, 2003Assignee: Engelhard CorporationInventors: Paul B. Cao, Michael Venturini
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Patent number: 6582506Abstract: Pigment flakes having cores preferably composed of resins, polymers, thermoplastics, and/or thermosets with colorant (pigment and/or dyes) deposited thereon, coating applications thereof, and a method for making pigment flakes which includes providing a core material, compounding the core material, processing the core material into uniform forms such as films, wires, thread with rectangular cross sections and bead strings, providing colorant material, vaporizing the colorant material, exposing a surface of core material to the vaporized colorant material to form a layer of colorant on thereon, and fracturing the resultant colorant layered core material into flakes.Type: GrantFiled: May 25, 2001Date of Patent: June 24, 2003Assignee: Hampden Papers, Inc.Inventor: Michael E. Archambeault
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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: 6579357Abstract: A bismuth oxychloride effect pigment exhibiting improved light stability has a discontinuous coating of hydrous iron oxide on the crystals of the bismuth oxychloride. The pigment is prepared by growing the bismuth oxychloride crystals, adding a hydrolyzable iron salt thereto and then hydrolyzing the iron salt.Type: GrantFiled: May 14, 2002Date of Patent: June 17, 2003Assignee: Engelhard CorporationInventor: Paul Cao