With Other Metal Compound Patents (Class 106/459)
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Publication number: 20020000778Abstract: An umber paint, which is excellent in transparency and heat resistance, and which does not bring about environmental pollution, bulbs coated with the umber paint, and turn signal lams equipped with the bulbs. The umber paint, for turn signal lamps, contains at least a red pigment 10a and a yellow pigment 10b, wherein the yellow pigment comprises acetylacetone metal chelateumber.Type: ApplicationFiled: June 28, 2001Publication date: January 3, 2002Inventors: Koichi Nakamura, Midori Ishikawa
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Patent number: 6334893Abstract: The present invention relates to pigment mixtures containing at least two components component A being Al2O3 flakes coated with one or more metals, metal oxides and/or metal sulfides and component B being acicular or spherical colorants, and to their use in particular in varnishes, paints, printing inks, powder coating materials, plastics and cosmetic formulations.Type: GrantFiled: December 23, 1999Date of Patent: January 1, 2002Assignee: Merck Patent Gesellschaft mit Beschrankter HaftungInventors: Gerhard Pfaff, Sabine Schoen, Kaiman Shimizu
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Publication number: 20010022151Abstract: The present invention provides new solid solutions having a corundum-hematite crystalline structure which are useful as inorganic color pigments. Solid solutions according to the present invention include a host component having a corundum-hematite crystalline structure which contains as guest components one or more elements from the group consisting of aluminum, antimony, bismuth, boron, chrome, cobalt, gallium, indium, iron, lanthanum, lithium, magnesium, manganese, molybdenum, neodymium, nickel, niobium, silicon, tin, titanium, vanadium, and zinc. Solid solutions according to the present invention are formed by thoroughly mixing compounds, usually metal oxides or precursors thereof, which contain the host and guest components and then calcining the compounds to form the solid solutions having the corundum-hematite crystalline structure. Some of the new solid solutions according to the present invention exhibit relatively low Y CIE tri-stimulus values and relatively high near infrared reflectance.Type: ApplicationFiled: December 20, 2000Publication date: September 20, 2001Inventors: Terrence R. Sliwinski, Richard A. Pipoly, Robert P. Blonski
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Patent number: 6290766Abstract: A lustrous interference pigment with a black absorption color is obtained by forming a mica coated with hydrous titanium, iron and cobalt or chromium oxides, calcining the coated mica and then coating the resulting product with hydrous titanium and/or iron oxides and calcining the resulting product.Type: GrantFiled: February 24, 1999Date of Patent: September 18, 2001Assignee: Engelhard CorporationInventors: Carmine Vincent DeLuca, Jr., William P. Kurtenbach, Christine Mans
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Patent number: 6235106Abstract: One aspect of the invention relates to a blue shade black pigment composition, containing at least iron oxide, chrome oxide, wherein the ratio of iron to chromium is from about 1:1 to about 5:1 by weight; and manganese oxide. Another aspect of the invention relates to a method of making a blue shade black pigment involving combining iron oxide, chrome oxide, and manganese oxide to form a mixture; heating the mixture to a temperature from about 700° C. to about 1,300° C. for a time from about 1 to about 5 hours; and optionally agitating the heated mixture to provide the blue shade black pigment. Yet another aspect of the invention relates to a plastic composition containing a plastic material and a blue shade black pigment composition containing at least iron oxide, chrome oxide, and manganese oxide.Type: GrantFiled: September 28, 2000Date of Patent: May 22, 2001Assignee: Engelhard CorporationInventors: William Gerald Loucka, Mark Edward Gall, Jerome David Thomas
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Patent number: 6235372Abstract: This invention relates to a color stable pigment composition for coating hard mineral granules employed for weather surfacing asphalt roofing and siding shingles. The composition is a 40-60% aqueous slurry of pigment containing ferrosoferric oxide and a silicate/clay mixture which is suitable for coating the surface of the mineral granules. The invention also pertains to a process for the manufacture of the coated granules, to the dry coated mineral granule product containing ferrosoferric oxide bonded in a silicate/clay matrix which is suitable for surfacing asphaltic shingles, to the dried composition containing from about 5 to about 50 wt. % total pigment in a silicate/clay matrix in which the pigment contains Fe3O4 in a concentration of between about 2 and about 100% and to a Fe3O4 pigment mixture per se.Type: GrantFiled: June 4, 1999Date of Patent: May 22, 2001Assignee: ISP Investments Inc.Inventor: Ingo B. Joedicke
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Patent number: 6231661Abstract: A fine red iron oxide pigment of the present invention comprises hematite particles and having a geometrical standard deviation of major axial diameter of not more than 1.5, a geometrical standard deviation of minor axial diameter of not more than 1.3 and an average major axial diameter of 0.005 to 0.1 &mgr;m. Such fine red iron oxide pigment is uniform in both major axial diameter and minor axial diameter thereof and exhibits an excellent transparency.Type: GrantFiled: September 24, 1999Date of Patent: May 15, 2001Assignee: Toda Kogyo CorporationInventors: Kazuyuki Hayashi, Mineko Ohsugi, Hiroko Morii
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Patent number: 6214106Abstract: The present invention provides a process for the production of hydrophobic inorganic oxide products which comprises reacting the inorganic oxide particles with organohalosilanes, preferably organochlorosilanes, to produce hydrophobic organosilane coated inorganic oxides. It is preferred that the organohalosilane compounds be reacted with the inorganic oxide particles in an aqueous slurry and subjected to intense mixing. The inorganic oxide pigments prepared by the processes of this invention have essentially quantitative retention of the organosilanes and contain no adsorbed aldehydes on their surface. The by-products produced in the preferred embodiments of the invention are innocuous salts, which are environmentally safe and readily disposable.Type: GrantFiled: October 28, 1998Date of Patent: April 10, 2001Assignee: Millenium Inorganic Chemicals, Inc.Inventors: Leon Weber, Robert J. Kostelnik, Charles Wheddon
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Patent number: 6200376Abstract: Heat-resistant yellow pigment particles of the present invention comprise a composite metal oxide containing Fe, Ti and Li, and comprising a crystal phase having a pseudobrookite-type structure. Such the heat-resistant yellow pigment particles are free from contamination of harmful metals such as Pb, Cr, Cd, etc., show a clear yellow color, are excellent in heat resistance, chemical resistance and light resistance, and have a low specific gravity.Type: GrantFiled: April 7, 1999Date of Patent: March 13, 2001Assignee: Toda Kogyo CorporationInventors: Tsutomu Katamoto, Mamoru Fujimoto
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Patent number: 6193794Abstract: The iron oxide platelets comprise at least one layer packet comprising A) a colorless coating having a refractive index n≦1.8, and B) a colorless coating having a refractive index n≧2.0.Type: GrantFiled: March 2, 1999Date of Patent: February 27, 2001Assignee: BASF AktiengesellschaftInventors: Raimund Schmid, Oliver Seeger, Norbert Mronga
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Patent number: 6190445Abstract: The present invention is directed to the development of a highly safe high-chroma orange pearl pigment replacing a cadmium pigment, in which a flaky substrate has surfaces coated with spherical metal oxide particles containing iron oxide, or spherical metal oxide particles obtained by adding thereto a specific proportion of one or more oxides selected from among aluminum, calcium and magnesium oxides, and a process for manufacturing the same, and uses thereof.Type: GrantFiled: November 19, 1998Date of Patent: February 20, 2001Assignee: Merck Patent GesellschaftInventor: Tamio Noguchi
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Patent number: 6179908Abstract: The present invention relates to iron oxide red pigments, a process for the production of iron oxide red pigments by calcining iron oxide yellow pigments or iron oxide black pigments, and the use thereof.Type: GrantFiled: October 15, 1998Date of Patent: January 30, 2001Assignee: Bayer AGInventors: Rolf-Michael Braun, Eckhard Bayer, Ulrich Meisen
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Patent number: 6174360Abstract: The present invention provides new solid solutions having a corundum-hematite crystalline structure which are useful as inorganic color pigments. Solid solutions according to the present invention include a host component having a corundum-hematite crystalline structure which contains as guest components one or more elements from the group consisting of aluminum, antimony, bismuth, boron, chrome, cobalt, gallium, indium, iron, lanthanum, lithium, magnesium, manganese, molybdenum, neodymium, nickel, niobium, silicon, tin, titanium, vanadium, and zinc. Solid solutions according to the present invention are formed by thoroughly mixing compounds, usually metal oxides or precursors thereof, which contain the host and guest components and then calcining the compounds to form the solid solutions having the corundum-hematite crystalline structure. Some of the new solid solutions according to the present invention exhibit relatively low Y CIE tri-stimulus values and relatively high near infrared reflectance.Type: GrantFiled: October 26, 1998Date of Patent: January 16, 2001Assignee: Ferro CorporationInventors: Terrence R. Sliwinski, Richard A. Pipoly, Robert P. Blonski
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Patent number: 6153296Abstract: Acicular hematite particles of the present invention contain zirconium of 0.05 to 30% by weight (calculated as Zr) based on the total weight of the particles, which is present within the particle, which have an average major axis diameter of not more than 0.3 .mu.m and a pH value of not less than 8, and contain not more than 300 ppm of soluble sodium salt, calculated as Na and not more than 150 ppm of soluble sulfate, calculated as SO.sub.4.Such acicular hematite particles are suitable as non-magnetic particles for a non-magnetic undercoat layer of a magnetic recording medium which exhibits a low light transmittance, an excellent smooth surface, a high strength and an excellent durability, and can be prevented from being deteriorated in magnetic properties due to the corrosion of magnetic acicular metal particles containing iron as a main component which are dispersed in a magnetic recording layer thereof.Type: GrantFiled: March 11, 1999Date of Patent: November 28, 2000Assignee: Toda Kogyo CorporationInventors: Kazuyuki Hayashi, Keisuke Iwasaki, Tosiharu Harada, Hiroko Morii
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Patent number: 6143194Abstract: The invention relates to magnetite particles having an iron content of 45 to 73 wt. %, a process for their production and their use for the production of toners, printing inks and inks for ink jet printers.Type: GrantFiled: October 7, 1997Date of Patent: November 7, 2000Assignee: Bayer AGInventors: Wolfgang Korschen, Ulrich Meisen
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Patent number: 6139615Abstract: A pearlescent pigment which is a ferrite-coated iron oxide-coated platy substrate in which the ferrite is substantially free of crystallites is obtained by adding metal ions to a slurry of hydrous iron compound and platy particles and then co-calcining in the metal and iron.Type: GrantFiled: February 27, 1998Date of Patent: October 31, 2000Assignee: Engelhard CorporationInventor: Steven Alan Jones
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Patent number: 6139610Abstract: A corrosion-inhibiting composition for application to a metal substrate, such as steel, silver, copper or aluminum, includes a film-forming organic polymer component and a dispersed pigment phase of a stable unitary hybrid which contains organic and inorganic solid phase constituents interfaced at a micro-crystalline level, which are inseparable by physical separation procedures and which display uniphase behavior. The inorganic phase includes a cation selected from Zn, Al, Mg, Ca, Sr, Ti, Zr, Ce and Fe and an anion selected from phosphates, polyphosphates, phosphites, molybdates, silicates and cyanamides.Type: GrantFiled: June 3, 1999Date of Patent: October 31, 2000Assignee: Wayne Pigment Corp.Inventor: John Sinko
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Patent number: 6139618Abstract: A fine yellow composite iron oxide hydroxide pigment of the present invention has an average major axial diameter of not less than 0.005 .mu.m and less than 0.1 .mu.m, which comprises:fine goethite particles as core particles, containing aluminum inside thereof in an amount of 0.05 to 50% by weight, calculated as Al, based on the weight of said core particles; anda composite oxide hydroxide of Fe and Al, coated on the surface of each core particle. Such fine yellow composite iron oxide hydroxide pigment are excellent in transparency and heat resistance.Type: GrantFiled: August 26, 1999Date of Patent: October 31, 2000Assignee: Toda Kogyo CorporationInventors: Kazuyuki Hayashi, Mineko Ohsugi, Hiroshi Sumita, Hiroko Morii
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Patent number: 6129784Abstract: A color titanium dioxide coated mica pigment and a coated body applied the pigment which comprise a flaky mica substrate and a composite oxide that is coated onto said mica substrate, and titanium, iron, and nickel are comprised as a metal that is composed of said composite oxide, can improve the color tone of the titanium dioxide coated mica pigment without using an organic substance and a color titanium dioxide coated mica pigment and a coated body applied the pigment which coats a titanium dioxide layer onto said composite oxide can provide a pigment which has color tone flip-flop property that the color tone changes according to the observed direction.Type: GrantFiled: September 28, 1998Date of Patent: October 10, 2000Assignee: Shiseido Co., Ltd.Inventors: Yukie Ikuta, Asa Kimura
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Patent number: 6120898Abstract: The present invention relates to acicular hematite particles containing aluminum of 0.05 to 50% by weight, calculated as Al, having an average major axial diameter of not more than 0.3 .mu.m and a pH value of the particles of not less than 8, and containing soluble sodium salts of not more than 300 ppm soluble sodium, calculated as Na, and soluble sulfates of not more than 150 ppm soluble sulfate, calculated as SO.sub.4, which have an excellent dispersibility in a binder resin, and a magnetic recording medium which uses the hematite particles as non-magnetic particles for a non-magnetic undercoat layer, which has small light transmittance, smooth surface, high strength and high durability, and which is capable of suppressing the deterioration in the magnetic properties caused by a corrosion of the magnetic particles containing as a main ingredient in the magnetic recording layer.Type: GrantFiled: January 8, 1998Date of Patent: September 19, 2000Assignee: Toda Kogyo CorporationInventors: Kazuyuki Hayashi, Keisuke Iwasaki, Hiroko Morii, Yasuyuki Tanaka
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Patent number: 6117228Abstract: Pure-coloured iron oxide yellow pigments having a silking index of less than 5 and a heat resistance of greater than 220.degree. C. in polyethylene for at least 5 minutes are obtained by oxidation of metallic iron with nitrobenzene in an acid medium in the presence of compounds of elements chosen from main groups 3 and 4 of the periodic table.Type: GrantFiled: November 16, 1998Date of Patent: September 12, 2000Assignee: Bayer AGInventors: Wilfried Burow, Wolfgang Oehlert
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Patent number: 6087004Abstract: In accordance with the present invention, there are provided non-magnetic black particles composed primarily of Fe and having a hematite structure, which shows an excellent blackness, heat resistance, and dispersibility in a vehicle, and which particles contain manganese in an amount of 5 to 40% by weight based on the weight of the non-magnetic black particles, a soluble sodium salt in an amount of not more than 500 ppm (calculated as Na), and a soluble sulfate in an amount of not more than 200 ppm (calculated as SO.sub.4), and have an average particle size of 0.1 to 10.0 .mu.m and a pH of not less than 5.5.Type: GrantFiled: August 18, 1997Date of Patent: July 11, 2000Assignee: Toda Kogyo CorporationInventors: Yasuyuki Tanaka, Hiroko Morii, Kazuyuki Hayashi, Hiroshi Sumita
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Patent number: 6083316Abstract: An adhesive-free, dry, free-flowing powder composition suitable for use in surface defect detection, where the powder composition comprises a physical mixture of particles of a colorant and particles of an extender, which mixture includes particles of colorant and particles of extender each having a particle size of less than 100 .mu.m. The powder compositions of the invention provide a simple, effective guide coat which readily highlights surface imperfections, such as scratches, orange peel effect and dry over-spray without the need for solvents. Also, there are disclosed methods of using such a powder composition to detect surface imperfections, an apparatus for applying same, a device for refilling such applying apparatus, and coated surfaces formed thereby.Type: GrantFiled: November 24, 1997Date of Patent: July 4, 2000Assignee: 3M Innovative Properties CompanyInventor: David R. Bastow
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Patent number: 6080232Abstract: The invention relates to spherical colored pigments having an average particle diameter of less than 10 .mu.m on the basis of an oxide, a mixed oxide or a silicate. The pigments are obtainable by means of spray-pyrolysis technology: a solution containing oxide-forming or silicate-forming metal compounds is converted into an aerosol and the latter is fed, preferably after predrying, to a pyrolysis reactor; the pigment is separated from the pyrolysis gas. The colored pigments according to the invention are suitable for the production of ceramic decorations and for the coloring of plastics, synthetic foils, fibers and also lacquers. By reason of the spherical shape, unusual technical application properties are achieved.Type: GrantFiled: November 14, 1997Date of Patent: June 27, 2000Assignee: Degussa AktiengesellschaftInventors: Jorg Sperlich, Ralph Brandes, Hauke Jacobsen, Stipan Katusic, Andreas Schulz
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Patent number: 6080233Abstract: Disclosure describes a cobalt-containing iron oxide pigments comprising:a cobalt-containing iron oxide core, the average concentration of cobalt distributed evenly in an innermost 50% by weight of the cobalt-containing iron oxide core being from 0.1 to 1.0% by weight (calculated as Co) based on iron oxide contained therein, and the content of Fe.sup.2+ in the core being from 16 to 22% by weight based on the iron oxide contained in the cobalt-containing iron oxide core; anda cobalt-containing iron oxide surface layer, the average concentration of cobalt in the surface layer of the outermost 10% by weight of the pigment being on average at least five times as high as the average concentration of cobalt in the innermost 50% by weight of the cobalt-containing iron oxide core.Type: GrantFiled: June 14, 1994Date of Patent: June 27, 2000Assignee: Toda Kogyo CorporationInventor: Berndt-Ullrich Kohler
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Patent number: 6053972Abstract: Non-silking iron oxide yellow pigments with high color density.Iron oxide yellow pigments in the .alpha.-FeOOH modification with a silking index of less than 5 were obtained in whicha) .alpha.-FeOOH seeds are produced by precipitation from an Fe(II)-containing solution with an alkaline precipitating agent in the presence of soluble aluminium salts in an amount of 3 to 9 wt. %. calculated as Al.sub.2 O.sub.3, with respect to precipitated .alpha.-FeOOH, and subsequent oxidation to .alpha.-FeOOH andb) pigment growth is performed by precipitating further iron with simultaneous oxidation, wherein the seed/time yield is less than 0.3 h.sup.-1 and the pH value is less than 3.9 over the entire period of pigment growth andc) pigment growth is terminated at a reproduction factor between 3 and 20.Type: GrantFiled: November 16, 1998Date of Patent: April 25, 2000Assignee: Bayer AGInventors: Ulrike Pitzer, Rolf Naumann, Rolf-Michael Braun
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Patent number: 6042642Abstract: The present invention relates to iron oxide yellow pigments, to a method of producing iron oxide yellow pigments by a precipitation method from iron(II) chloride and an alkaline component, and to the use thereof.Type: GrantFiled: October 15, 1998Date of Patent: March 28, 2000Assignee: Bayer AGInventors: Rolf-Michael Braun, Eckhard Bayer, Ulrich Meisen
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Patent number: 6027559Abstract: Yellow iron oxide hydroxide particles comprising:iron oxide hydroxide particle as a core, andcomposite oxide hydroxide of Fe and Al deposited on surface of said iron oxide hydroxide particle as a core wherein the amount of Al in said composite oxide hydroxide is 0.1 to 10% by weight, calculated as Al, based on the weight of said iron oxide hydroxide as a core, the amount of Fe in said composite oxide hydroxide is 0.1 to 50% by weight, calculated as Fe, based on the weight of said iron oxide hydroxide particle as a core, and the ratio of Al to Fe in said composite oxide hydroxide is 0.05:1 to 2:1, calculated as Al and Fe atoms,said yellow iron oxide hydroxide particles having an average major axis diameter of 0.1 to 1.0 .mu.m, an average minor axis diameter of 0.02 to 0.10 .mu.m, an aspect ratio (major axis diameter/minor axis diameter) of 2 to 20, a BET specific surface area of 10 to 180 m.sup.2 /g and a heat-resistance temperature of not less than 255.degree. C.Type: GrantFiled: June 22, 1998Date of Patent: February 22, 2000Assignee: Toda Kogyo CorporationInventors: Hiroko Morii, Mineko Ohsugi, Kazuyuki Hayashi, Hiroshi Sumita
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Patent number: 6024890Abstract: The present invention relates to phosphorus-containing ferromagnetic pigments comprising, in particular, from 30 to 70% by volume of a core, said core comprising essentially iron and cobalt, and from 30 to 70% of a shell, said shell comprising essentially aluminum, phosporus, silicon, oxygen, and optionally magnesium and sodium; the invention further relates to a process for preparation of said pigments, their use in magnetic recording materials and magnetic recording materials which contain such pigments.Type: GrantFiled: July 13, 1998Date of Patent: February 15, 2000Assignee: EMTEC Magnetics GmbHInventors: Peter Poganiuch, Ekkehard Schwab, Wilma M. Dausch, Reinhard Korner, Werner Wimbersky
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Patent number: 6022406Abstract: A method for preparing inorganic pigments from steel mill dust, particularly electric steel mill dust, wherein (a) the dust is separated into a magnetic fraction and a non-magnetic fraction; (b) the non-magnetic fraction is subjected to a basic leaching reaction; (c) the resulting solid batch is rinsed until neutralized and then separated; (d) the resulting batch is calcined at 450-650.degree. C.; (e) the calcined batch is treated with sulfuric acid in the presence of a catalyst; (f) the inorganic pigments are recovered; and (g) the solutions from (c) and (e) are used to precipitate other pigments.Type: GrantFiled: May 27, 1998Date of Patent: February 8, 2000Assignee: RecupacInventors: Gilles Roux, Farouk Tedjar
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Patent number: 6022404Abstract: Surface-modified, pyrogenically produced mixed oxides which contain two or more components of the series SiO.sub.2, Al.sub.2 O.sub.3, TiO.sub.2, ZrO.sub.2, Fe.sub.2 O.sub.3, Nb.sub.2 O.sub.5, V.sub.2 O.sub.5, WO.sub.3, SnO.sub.2, GeO.sub.2 and have been surface-modified with one to several compounds of the following groups:(a) organosilanes of the type (RO).sub.3 Si(C.sub.n H.sub.2n+1),(b) R'.sub.x (RO).sub.y Si(C.sub.n H.sub.2n+1),(c) X.sub.3 Si(C.sub.n H.sub.2n+1),(d) X.sub.2 (R')Si(C.sub.n H.sub.2n+1),(e) X(R').sub.2 Si(C.sub.n H.sub.2n+1),(f) (RO).sub.3 Si(CH.sub.2).sub.m --R',(g) (R").sub.x (RO).sub.y Si(CH.sub.2).sub.m --R',(h) X.sub.3 Si(CH.sub.2).sub.m --R',(i) (R)X.sub.2 Si(CH.sub.2).sub.m --R',(j) (R).sub.2 X Si(CH.sub.2).sub.m --R',(k) Silazanes of the type ##STR1## (l) Cyclic polysiloxanes, (m) Polysiloxanes or silicone oils.Type: GrantFiled: January 11, 1996Date of Patent: February 8, 2000Assignee: Degussa AktiengesellschaftInventors: Manfred Ettlinger, Werner Hartmann, Dieter Kerner, Jurgen Meyer
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Patent number: 6007616Abstract: Disclosed is a system of natural colours consisting of thousands of coloured powders of mineral origin and of materials in or on which pigments have been applied and, afterwards, submitted to at least one thermal treatment and/or irradiation. These natural colours cover the totality of the visible spectrum and offer a great variety of tones, tints and reflections from white to black, including all the rainbow colours. The powders of this system are obtained by mechanical, chemical, thermal and/or physical processes and are used alone or in combination. They are particularly useful to colour materials and, more especially those used in the construction and architectural fields.Type: GrantFiled: October 8, 1996Date of Patent: December 28, 1999Inventor: Paulette Tourangeau
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Patent number: 5989516Abstract: The present invention relates to a spindle-shaped goethite particles containing cobalt of 8.0 to 50.0 atm %, calculated as Co, based on the total Fe in the spindle-shaped goethite particles and a compound of at least one element selected from the group consisting of Al, Si, Nd, Y, La, Ce, Pr, Tb, Ca, Mg, Ba and Sr of not more than 25.0 atm %, calculated as the element, based on the total Fe in the spindle-shaped goethite particles, and having an average major axis diameter of 0.05 to 0.15 .mu.m, a size distribution (standard deviation/major axis diameter) of not more than 0.30, an average minor axis diameter of 0.010 to 0.025 .mu.m, an aspect ratio of 4 to 8 and an X-ray crystallite size ratio (D.sub.020 /D.sub.110) of 2.0 to 3.5.Type: GrantFiled: December 8, 1997Date of Patent: November 23, 1999Assignee: Toda Kogyo CorporationInventors: Kenji Okinaka, Yasutaka Ota
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Patent number: 5961710Abstract: The invention relates to granules of inorganic pigments, a process for their production using several auxiliary substances by compacting and their use in many technical fields.Type: GrantFiled: February 12, 1998Date of Patent: October 5, 1999Assignee: Bayer AktiengesellschaftInventors: Gunter Linde, Manfred Eitel, Olaf Schmidt-Park, Kai Butje
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Patent number: 5958125Abstract: Goniochromatic luster pigments based on multiply coated, high refractive, nonmetallic, platelet-shaped substrates which are at least partially transparent to visible light, comprising at least one layer packet ofA) a colorless coating having a refractive index n.ltoreq.1.8 andB) a reflecting, selectively or nonselectively absorbing coating which is at least partially transparent to visible light,and also, if desired, additionallyC) an outer protective layer,and their use for coloring paints, inks, including printing inks, plastics, glasses, ceramic products and decorative cosmetic preparations.Type: GrantFiled: July 5, 1996Date of Patent: September 28, 1999Inventors: Raimund Schmid, Norbert Mronga
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Patent number: 5931998Abstract: Disclosed is a system of natural colors consisting of thousands of colored powders of mineral origin and of materials in or on which pigments have been applied and, afterwards, submitted to at least one thermal treatment and/or irradiation. These natural colors cover the totality of the visible spectrum and offer a great variety of tones, tints and reflections from white to black, including all the rainbow colors. The powders of this system are obtained by mechanical, chemical, thermal and/or physical processes and are used alone or in combination. They are particularly useful to color materials and, more especially those used in the construction and architectural fields.Type: GrantFiled: October 8, 1996Date of Patent: August 3, 1999Inventor: Paulette Tourangeau
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Patent number: 5908499Abstract: Disclosed is a system of natural colors consisting of thousands of colored powders of mineral origin and of materials in or on which pigments have been applied and, afterwards, submitted to at least one thermal treatment and/or irradiation. These natural colors cover the totality of the visible spectrum and offer a great variety of tones, tints and reflections from white to black, including all the rainbow colors. The powders of this system are obtained by a combination of two mechanical, chemical, thermal and/or physical processes and are used alone or in combination. They are particularly useful to color materials and, more especially those used in the construction and architectural fields.Type: GrantFiled: October 8, 1996Date of Patent: June 1, 1999Inventor: Paulette Tourangeau
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Patent number: 5882395Abstract: The present invention relates to a process for producing inorganic granules and to their use for the coloring of building materials, particularly concrete, asphalt, plaster, mortar and cement mortar, and for the production of paints for the protection of buildings.Type: GrantFiled: August 8, 1997Date of Patent: March 16, 1999Assignee: Bayer AktiengesellschaftInventors: Gunter Linde, Lothar Steiling
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Patent number: 5876493Abstract: A method for stabilizing inorganic pigments in aqueous media and waterborne coating compositions is provided. The method comprises forming a pigment treatment composition of a polyester havng an acid number between 15 mg KOH/g and 50 mg KOH/g or a phosphate ester or pyrophosphate ester, having an acid number between 10 mg KOH/g and 50 mg KOH/g, solvent, and an amino functional resin. The composition is then deposited on the pigment. The treated pigment is stable in an aqueous environment and is suitable for waterborne coating compositions.Type: GrantFiled: November 3, 1995Date of Patent: March 2, 1999Assignee: BASF CorporationInventors: Gregory G. Menovcik, Thomas C. Balch, Hilary P. Davis, Paul Dudek
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Patent number: 5853476Abstract: A method for coloring cementitious systems using compacted inorganic granules, wherein said compacted inorganic granules comprise an inorganic pigment and a dispersing agent. Particularly, a method for coloring cementitious systems using compacted inorganic granules; wherein said compacted inorganic granules are produced by a process consisting of: (a) mixing an inorganic pigment and a dispersing agent, (b) compacting the mixture, (c) milling the compacted mixture, and (d) classifying the compacted mixture into at least one oversize material stream, at least one undersize material stream and at least one product stream of compacted inorganic granules; and wherein the coloring effect of the compacted inorganic granules in the cementitious system equals or exceeds the powder standard.Type: GrantFiled: August 11, 1997Date of Patent: December 29, 1998Assignee: Elementis Pigments, Inc.Inventor: James T. Will
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Patent number: 5849074Abstract: A method for making magnetic ink compositions is disclosed. The magnetic particles used in the ink are prepared from an aqueous slurry. A surface derivatizing agent is added to the slurry to render the magnetic pigment particles hydrophobic. The particles then sink to the bottom of the slurry, and the bulk water is then removed. After air drying, dry magnetic pigment particles are provided. The particles will be hydrophobic, and thus will have superior resistance to water as compared to previously known magnetic pigment particles. Magnetic ink compositions are formulated from the magnetic particles.Type: GrantFiled: July 19, 1996Date of Patent: December 15, 1998Assignee: Videojet Systems International, Inc.Inventor: Wing Sum Vincent Kwan
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Patent number: 5837051Abstract: The present invention relates to a process for the production of iron oxide brown, red and black pigments and to the use thereof.Type: GrantFiled: December 13, 1995Date of Patent: November 17, 1998Assignee: Bayer AGInventors: Jorg Krekel, Berndt-Ullrich Kohler, Horst Brunn
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Patent number: 5792250Abstract: This invention relates to a process for the production of inorganically coated pigments and fillers and to the use thereof.Type: GrantFiled: June 3, 1997Date of Patent: August 11, 1998Assignee: Bayer AktiengesellschaftInventors: Rolf-Michael Braun, Jurgen Kischkewitz, Hilmar Rieck, Udo Holtmann
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Patent number: 5766335Abstract: The invention relates to colored luster pigments consisting of a transparent or metallic reflecting core, of a coating consisting of at least one silicon oxide of the composition SiO.sub.0.25 to SiO.sub.0.95 and of further optional coatings, to coating processes by coating metallic silicon in the presence of oxygen, if required with changing its partial pressure, as well as to the use of these luster pigments for pigmenting plastic materials, paints and printing inks, and to pigmented compositions comprising these luster pigments.Type: GrantFiled: April 23, 1997Date of Patent: June 16, 1998Assignee: Ciba Specialty Chemicals CorporationInventors: Patrice Bujard, Natacha Bonnard
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Patent number: 5766336Abstract: Colored pigments are provided from the green-yellow to red spectrum based on oxide-nitrides with two or three different cations Q, R and S in the crystal lattice, wherein the nitrogen to oxygen atomic ratio is determinative for the color. These pigments crystallise in the pyrochlore, spinel or elpasolite structure. Pigments in the perovskite are as provided with increased color brilliance. The color of the pigments can be adjusted in a wide range of the color spectrum during their preparation within a substance class with the cations Q, R and S and while retaining the crystal structure, by increasing or lowering the atomic ratio N to O in the oxide-nitride and bringing about the required charge balancing by replacing an equivalent quantity of the cation Q with the valency q by a cation R with the valency q+1.Type: GrantFiled: August 21, 1995Date of Patent: June 16, 1998Assignee: Cerdec Aktiengesellschaft Keramische FarbenInventors: Martin Jansen, Hans-Peter Letschert
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Patent number: 5759257Abstract: The present invention relates to color pigments based on substrates which are coated with a doped layer of iron(III) oxide, to processes for their preparation and to their use, especially in aqueous coating systems.Type: GrantFiled: May 10, 1996Date of Patent: June 2, 1998Assignee: Merck Patent Gesellschaft mit Beschrankter HaftungInventors: Klaus Ambrosius, Matthias Schraml-Marth
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Patent number: 5753027Abstract: A transparent hematite, useful as a pigmentary material, is in the form of particles consisting essentially in their lattice of oxygen, iron and another metal M, the other metal being selected from the group consisting of cobalt, nickel, manganese, zirconium, vanadium, lithium and copper, and being present in an atomic ratio to the iron of 0.01-0.5:1, and the width of the particles, as measured by transmission electron microscopy, being less than 0.03 micron.Type: GrantFiled: July 6, 1995Date of Patent: May 19, 1998Assignee: Cookson Matthey Ceramics plcInventors: Alan Burt, Andrew L. Hulse, Richard L. O'Leary
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Patent number: 5742118Abstract: An ultrafine particle film which has excellent anti-staining properties, is effective for the prevention of electrostatic charge and reflection of visible light and can be applied to a large area at low cost, and an image display plate such as the one adapted to a Braun tube to which the ultrafine particle film is applied, and a process for producing the ultrafine particle film which comprises attaching a coating solution bath 22 to a surface of a Braun tube 21, filling the bath with a coating solution 23 containing antistatic SnO.sub.Type: GrantFiled: April 20, 1994Date of Patent: April 21, 1998Assignee: Hitachi, Ltd.Inventors: Yoshishige Endo, Masahiko Ono, Hiromitsu Kawamura, Katsumi Kobara, Yoshifumi Tomita, Masahiro Miyazaki, Takao Kawamura, Toshihiro Yamada, Toshiaki Kawabata, Takeshi Araya
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Patent number: 5738717Abstract: Coloring pigment of comparable quality to, and cheaper than, pigments products by chemical precipitation, is made from synthetic magnetite produced by oxidation of ferrous mill scale and reduced to a particle size such that preferably at least 85% of the product does not exceed 10 microns and 95% does not exceed 20 microns. The smaller the particle size the greater the tinting strength of the pigment. The pigment may be black or, by calcination of the synthetic magnetite, it may be red. For best quality the black pigment should contain 95-99.5% iron oxides, typically, and the magnetite should have a molecular ratio of 0.9 to 1.1:1. The shade and hue of red is dependent upon the calcination temperature and final size and shape of the particles. Reduction to the required particle size for the red coloring pigment may be done before and/or after calcination.Type: GrantFiled: February 7, 1996Date of Patent: April 14, 1998Assignee: Corveagh LimitedInventors: Bryon Thomas Oulsnam, Disederius Erasmus
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Patent number: 5730794Abstract: The invention relates to the use of synthetically produced, bainite-rich iron raw materials to prepare iron oxide pigments.Type: GrantFiled: February 24, 1997Date of Patent: March 24, 1998Assignee: Bayer AGInventors: Wilfried Burow, Wolfgang Oehlert, Bernd Iskluth