Zinc Oxide Containing Patents (Class 106/425)
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Patent number: 5344488Abstract: The application relates to pigments based on plate-like substrates which, if desired, are covered with one or more layers comprising metal oxides or metal oxide mixtures, zinc oxide being deposited on the surface of the substrates with the formation of a not entirely continuous layer.Type: GrantFiled: February 24, 1993Date of Patent: September 6, 1994Assignee: Merck Patent Gesellschaft mit beschrankter HaftungInventors: Peter Reynders, Hans D. Bruckner
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Patent number: 5340395Abstract: The technical field of the invention is concerned with smoke-generating devices and with powdered materials scattered by dispersion means in order to produce a camouflaging cloud which is effective in the infrared region. The material in accordance with the invention essentially consists of at least one powder having grains provided with a coating which is chemically inert with respect to the grain, which affords resistance to temperatures lower than or equal to the dispersion temperature, and which does not oxidize in free air.Type: GrantFiled: July 1, 1992Date of Patent: August 23, 1994Assignee: Giat IndustriesInventors: Daniel Larmignat, Phillippe C. Morand, Christian H. Prieur, Gilles F. Lacreuse
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Patent number: 5322563Abstract: A method for coloring building materials is disclosed, wherein a pigment suspension is added to the building materials. The pigment suspension based on pigment granules contains at least one pigment such as iron oxide, and a soluble phosphate salt. The soluble phosphate salt has a number ratio of monofunctional metal ions to phosphorus of 2:1 to 1:1, and is exemplified by sodium pyrophosphate, sodium polyphosphate, and sodium hexametaphosphate.Type: GrantFiled: July 6, 1993Date of Patent: June 21, 1994Assignee: Bayer AktiengesellschaftInventors: Karl-Heinz van Bonn, Bernd Krockert, Gunter Linde
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Patent number: 5318837Abstract: Soundproofing materials consisting essentially of zinc oxide whisker particles having a nucleus body and needle crystal portions extending radially from the central body in different plural directions. The materials may comprise a support material for supporting the zinc oxide whisker particles. Such support materials include inorganic materials such as metals, ceramics, glasses, cements, mortars and various fillers in the form of powder, flakes, fibers and the like, and organic materials such as resins, rubbers, waxes and the like. These materials are particularly suitable for sound insulation, sound proofing, vibration damping and vibration insulation.Type: GrantFiled: December 17, 1991Date of Patent: June 7, 1994Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Minoru Yoshinaka, Eizo Asakura, Mitsumasa Oku, Takeshi Hamabe, Motoi Kitano
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Patent number: 5312614Abstract: A method is provided for the high yield production of white, electrically conductive zinc oxide which comprises the simultaneous addition to a reactor of (1) an aqueous solution containing a water-soluble zinc compound and at least one water-soluble compound of a metal selected from the group consisting of tin, aluminum, gallium and indium, and (2) an aqueous alkaline solution, while maintaining the resulting neutralization reaction solution at a pH from 6 to 12.5 to obtain coprecipitates, and then calcining the coprecipitates in a reducing atmosphere to obtain said conductive zinc oxide.Type: GrantFiled: June 14, 1990Date of Patent: May 17, 1994Assignee: Metallgesellschaft AktiengesellschaftInventors: Takao Hayashi, Norihiro Sato, Chikara Omotani, Manabu Hosoi, Nobuyoshi Kasahara, Gunther Rudolph, Wolf-Dieter Griebler, Jorg Hocken
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Patent number: 5298065Abstract: Disclosed herein are an ultraviolet-screening scale pigment comprising scale-like inorganic particles and a zinc oxide coating layer of 50 to 250 wt% (calculated as ZnO) based on the scale-like inorganic particles, a water content of said zinc oxide coating layer being not more than 7 wt%; a process for producing the scale pigment; and cosmetics containing the scale pigment.Type: GrantFiled: January 4, 1993Date of Patent: March 29, 1994Assignee: Tayca CorporationInventors: Nobumoto Hiraoka, Norihiro Tanimoto, Mayumi Mandai
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Patent number: 5296285Abstract: An aluminum or aluminum alloy substrate having a low absorptance high emittance two-layer coating produced by first anodizing the substrate to form an anodic coating, followed by applying a topcoat of an inorganic white paint on the anodic coating, such dual layer coated substrate having spacecraft application, particularly for radiators.Type: GrantFiled: May 26, 1992Date of Patent: March 22, 1994Assignee: McDonnell Douglas CorporationInventors: Henry W. Babel, Huong G. Le
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Patent number: 5254162Abstract: Brown spinel pigments based on zinc chromite which are iron-free and exhibit an atomic ratio of chromium to zinc in a range of 1 to greater than 0.5 up to 2 are disclosed. Preferred pigments additionally contain manganese, in which instance the atomic ratio of Mn to Cr is a maximum of 0.2. The production of the pigments involves a firing process of a powder mixture consisting of the oxides the metals, or precursors thereof, contained in the pigment. Instead of previously known grayish-brown unattractive products, attractive brown pigments are obtained by means of the selected molar ratio and a baking temperature above 1200.degree. C. The novel pigments can be used in the presence of glass frits even at firing temperatures above 1200.degree. C. to 1500.degree. C. and are suitable for a common firing of ceramic carrier and decoration.Type: GrantFiled: September 18, 1992Date of Patent: October 19, 1993Assignee: Degussa AktiengesellschaftInventors: Dietrich Speer, Akos Kiss, Jenny Horst
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Patent number: 5198026Abstract: Zinc powder, which contains a coloring element, e.g., Ti, Mn, or V, is heated to a temperature of from 350.degree. to 700.degree. C. so as to oxidize the surface of the powder and hence to develop such colors as brown, navy blue, blue, greenish-brown, green, and coffee brown. The colored zinc powder is sprayed onto a steel, aluminum, or ceramic article to produce a colored article. The colored zinc powder is also used as a pigment.Type: GrantFiled: September 25, 1991Date of Patent: March 30, 1993Assignee: Nippon Mining Co., Ltd.Inventors: Eiji Nishimura, Chikara Tominaga, Yusaku Masuda, Hiroshi Tasaki
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Patent number: 5198025Abstract: Metal oxide-doped zinc oxide pigments are produced by processing an oxide, carbonate, hydroxide of hydroxycarbonate of zinc in the presence of water and an oxide, carbonate, hydroxide, hydroxy-carbonate, oxalate or formate of the doping metal into a paste using formic acid or oxalic acid in an amount which is at least sufficient for converting the oxides, carbonates, hydroxides or hydroxycarbonates mentioned into formates or oxalates, drying, grinding and calcining at from 700.degree. to 1100.degree. C. in an inert gas atmosphere.Type: GrantFiled: September 19, 1991Date of Patent: March 30, 1993Assignee: BASF AktiengesellschaftInventor: Wilma M. Dausch
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Patent number: 5190586Abstract: Disclosed are pigment composite particles which are superior in water resistance, weather resistance, thermal stability and hardness. The pigment composite particles are prepared by suspension-polymerizing an aqueous suspension comprising(a) a pigment paste comprising pigment and a pigment grinding resin having a hydrophilic group of at least 0.2 mmol/g,(b) a polymerizable monomer and(c) a polymerization initiator.Type: GrantFiled: November 28, 1990Date of Patent: March 2, 1993Assignee: Nippon Paint Co., Ltd.Inventors: Katsumi Mizuguchi, Masanori Ohiwa, Keizou Ishii, Shinichi Ishikura
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Patent number: 5186748Abstract: An improved process for the preparation of bismuth vanadate pigments and solid solutions based on bismuth vanadate by a) mixing a solution of a bismuth (III) salt containing, if required, one or more further metal salts or a mixture thereof with the aqueous solution of a vanadate salt containing, if required, a molybdate, tungstate or sulfate salt or a mixture thereof and b) subjecting the suspension thus obtained to a subsequent aftertreatment to convert the particles first precipitated in amorphous form into crystalline compounds, wherein during the mixing and/or during the subsequent aftertreatment step fluoride ions are used.Type: GrantFiled: February 27, 1992Date of Patent: February 16, 1993Assignee: Ciba-Geigy CorporationInventors: Leonardus J. H. Erkens, Gregor Schmitt, Herman J. J. M Geurts, Werner F. C. G. Corvers
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Patent number: 5174817Abstract: A process for calcining a filter cake in a directly heated rotary kiln wherein part of the filter cake is separated from the entire mass of filter cake, the separated portion is predried and recombined with the remainder portion and the combined predried and remainder portion is calcined. The filter cake can be inorganic solids such as oxides of titanium, chromium (III), zinc and iron.Type: GrantFiled: June 18, 1990Date of Patent: December 29, 1992Assignee: Bayer AktiengesellschaftInventors: Bernd-Michael Holle, Peter Beumer, Rolf M. Braun, Hilmar Rieck, Jurgen Kischkewitz, Gerhard Wiederhoft
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Patent number: 5171364Abstract: A process for preparing a conductive, acicular zinc oxide, comprising the steps of: preparing a zinc oxide slurry comprising an acicular zinc oxide, a salt of at least one metal selected from the group consisting of aluminum, gallium, indium and tin and an aqueous solution of an alkali metal hydroxide and having a pH value maintained at 10 to 13, adjusting the pH value of said zinc oxide slurry to 5 to 9 while stirring, aging the slurry, separating the zinc oxide present in the slurry by filtration, washing and drying the separated zinc oxide, and then firing the dried zinc oxide at 500.degree. to 700.degree. C. in a reducing atmosphere.Type: GrantFiled: November 13, 1991Date of Patent: December 15, 1992Assignees: Mitsui Mining & Smelting Co. Ltd., Metallgesellschaft AktiengesellschaftInventors: Norihiro Sato, Takao Hayashi, Nobuyoshi Kasahara, Wolf-Dieter Griebler, Jorg Hocken, Gunther Rudolph
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Patent number: 5156678Abstract: Effect pigments based on interference pigments coated with phthalocyanine or metal phthalocyanine dyes, characterized in that the dyes are applied to the pigments as a strongly adhering film without the aid of binders or other auxiliary materials, are outstandingly suitable for use in formulations such as paints, dyes, plastics and cosmetics.Type: GrantFiled: March 25, 1991Date of Patent: October 20, 1992Assignee: Merck Patent Gesellschaft mit beschraenkter HaftungInventor: Ralf Glausch
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Patent number: 5137567Abstract: The pigment is constituted by zinc phosphate dihydrate or tetrahydrate with an excess of from 0.5 to 6% of zinc oxide over the stoichiometric amount and has the form of rough surfaced spheroids having a maximum dimension lying between 0.5 and 6 microns and a mean size lying between 1.5 and 2.5 microns.Type: GrantFiled: November 20, 1989Date of Patent: August 11, 1992Assignee: Colores Hispania S.A.Inventors: Juan Aubareda Vallvey, Oscar Leblanc Francia, Martorell Sole
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Patent number: 5132104Abstract: A needle-like monoammine complex of zinc carbonate containing or not containing aluminum useful as a filler or a precursor of needle-like electroconductive zinc oxide, and a process for producing it which comprises steps of dissolving a zinc compound in a solution containing ammonium ion and carbonate ion in the presence or absence of aluminum compound and then lowering pH of the solution to precipitate zinc carbonate.Type: GrantFiled: July 23, 1990Date of Patent: July 21, 1992Assignee: Lion CorporationInventors: Nobuyuki Yamamoto, Masahiro Nemoto, Fumitomo Noritake, Junko Tomita, Noriyuki Ban
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Patent number: 5102650Abstract: Needle-like electrically conductive zinc oxide filler having low specific volume resistance and excellent electrical conductivity-imparting effect per unit weight thereof is provided, including a method for its preparation.Type: GrantFiled: June 26, 1990Date of Patent: April 7, 1992Assignees: Metallgesellschaft Aktiengesellschaft, Mitsui Mining & Smelting Co., Ltd.Inventors: Takao Hayashi, Norihiro Sato, Chikara Omotani, Manabu Hosoi, Nobuyoshi Kasahara, Gunther Rudolph, Wolf-Dieter Griebler, Jorg Hocken
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Patent number: 5094693Abstract: There is disclosed a doped zinc oxide pigment composition and method of preparing said composition, wherein the dopant is uniformly dispersed in the zinc oxide matrix in the form of a solid solution such that the mechanism by which undoped zinc oxide absorbs blue or near ultraviolet light is suppressed, thereby yielding a whiter composition. Preferred dopants are Al and Li.Type: GrantFiled: February 20, 1990Date of Patent: March 10, 1992Assignee: International Lead Zinc Research Organization, Inc.Inventors: James F. Cordaro, Howard C. Rafla-Yuan
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Patent number: 5006174Abstract: A smoke suppressant additive for halogenated polymer compositions which consists of a mixture of from 30 to 70% by weight of zinc oxide and from 70 to 30% by weight of caustic calcined magnesium oxide with the addition thereto of up to 20% by weight of finely divided silica based upon the total weight of the zinc oxide and magnesium oxide, the mixture having being subjected to calcination at a temperature in the range of from 700.degree. to 1100.degree. C. for a period of time of from 1 to 6 hours.The additive is incorporated into halogenated polymers in an amount of from 0.5 to 10% by weight, preferably about 2.5% by weight.Type: GrantFiled: July 10, 1989Date of Patent: April 9, 1991Assignee: Cookson Group PLCInventors: Ernest W. J. Michell, Shona M. Page
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Patent number: 4966630Abstract: An anticorrosive pigment composition comprising (A) a slightly water-soluble condensed phosphoric acid salt and (B) at least one compound selected from the group consisting of zinc compounds, boric acid compounds and lead compounds, at least one of (A) and (B) having been chemically modified.Type: GrantFiled: March 27, 1989Date of Patent: October 30, 1990Assignee: Tayca CorporationInventor: Masaaki Okuda
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Patent number: 4956019Abstract: Flaky colored pigment comprising fine flaky powder as base material, and zinc oxide and an inorganic color pigment attached to the surface thereof.Type: GrantFiled: August 13, 1987Date of Patent: September 11, 1990Assignee: Merck Patent Gesellschaft mit beschrankter HaftungInventors: Tamio Noguchi, Takaji Watanabe
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Patent number: 4952617Abstract: A pigment dispersion of enhanced viscosity and heat stability characteristics for use in coating systems is provided. The pigment dispersions generally comprise a pigment carrier, a pigment of the type having a hydrophilic surface, and a surfactant functional as a dispersant in a relatively non polar matrix and which is present on the surface of the pigment in an effective amount. Pigment carriers include water-based carriers and organic solvent-based carriers. Finished coatings having improved viscosity and heat stability are also provided. The finished coatings comprise a coating base and the surfactant treated pigments. Such pigments include iron oxide pigments yellow iron oxide pigment, black iron oxide pigment, divalent ferrite pigments, zinc ferrite pigment, and magnesium ferrite pigment. Such surfactants include trimethylol propane, and trimethylol ethane.Type: GrantFiled: January 17, 1989Date of Patent: August 28, 1990Assignee: Columbian Chemicals CompanyInventors: Jorge A. Ayala, George A. Joyce
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Patent number: 4944802Abstract: Magnetic inks useful for the production of magnetic recording products are disclosed. The present magnetic inks contain ferromagnetic barium ferrite particles dispersed in a flexible polymer medium.Type: GrantFiled: September 16, 1988Date of Patent: July 31, 1990Assignee: Omni Quest CorporationInventors: Mark S. Chagnon, John R. Ferris
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Patent number: 4921540Abstract: Corrosion inhibiting pigments on the basis of zinc silicate are produced from 35-65% by weight of ZnO, 15-35% by weight of SiO.sub.2, 5-20% by weight of B.sub.2 O.sub.3, and 1-20% by weight of WO.sub.3 which can be entirely or partly substituted by, MoO.sub.3 and/or SnO.sub.2 wherein the amount of zinc silicate, boron oxide and, if necessary, the other metal oxides or their hydrates singly or in a combination thereof is such that the entire combination with the zinc silicate and the boron oxide contains at least one of the oxides WO.sub.3, MoO.sub.3 and/or SnO.sub.2 in amounts bringing the balance to 100%. The pigments can be manufactured by dry mixing of the components, melting for 1-3 hours at 1100.degree. C.-1400.degree. C. and subsequent grinding to desired fineness.Type: GrantFiled: March 13, 1987Date of Patent: May 1, 1990Assignee: Dr. Hans Heubach GmbH & Co. KGInventors: Manfred Gawol, Gerhard Adrian
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Patent number: 4892591Abstract: Disclosed is a filler for ink jet recording paper, said filler being composed of amorphous silica particles having a median diameter, measured by the coulter counter method, of 2 to 15 .mu.m, an oil absorption of at least 180 ml/100 g, a refractive index, measured by the solvent method, of at least 1.450, and a moisture absorption, measured when it is caused to absorb moisture for 200 hours at a relative humidity of 90% and a temperature of 25.degree. C., of at least 35%, and a coating of a compound of a metal of Group II of the periodic table on the surface of the silica particles in an amount of 0.5 to 20% by weight.Type: GrantFiled: June 3, 1988Date of Patent: January 9, 1990Assignee: Mizusawa Industrial Chemicals Ltd.Inventors: Masahide Ogawa, Teiji Sato, Masao Takahashi, Kazumitsu Enomoto
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Patent number: 4867793Abstract: Platelet-shaped colored pigments in which a platelet-shaped substrate is provided with a compact coating containing iron(II) oxide, which coating has a high gloss and, depending on the layer thickness, shows the interference color of thin platelets, are described.Type: GrantFiled: May 22, 1987Date of Patent: September 19, 1989Assignee: Merck Patent Gesellschaft mit Beschrankter HaftungInventors: Klaus D. Franz, Kalus Ambrosius, August Kanpp, Hans D. Brucker
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Patent number: 4840668Abstract: The invention relates to corrosion-inhibiting pigments containing metallic oxides, phosphates and/or molybdates, wherein the metals are zinc, aluminum, iron, barium, strontium, calcium, magnesium and titanium, singly or in combination, wherein the pigments also contain 0.03-2% by weight of soluble sodium dichromate or equivalent amounts of potassium dichromate, ammonium dichromate or equivalent amounts of respective chromates or chromic acid, singly or in their mixture. The invention also relates to a process for the manufacture of the pigments by thorough homogenization of the chromate components with the pigments, and to the use of the pigments in primers for ferrous and non-ferrous metallic substrates.Type: GrantFiled: September 30, 1987Date of Patent: June 20, 1989Assignee: Dr. Hans Heubach GmbH & Co. KGInventors: Manfred Gawol, Gerhard Adrian