Zinc Oxide Containing Patents (Class 106/425)
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Publication number: 20010031272Abstract: To provide an ultraviolet absorbent having high UV shieldability, especially UV-A shieldability, high transparency and good dispersibility.Type: ApplicationFiled: April 23, 2001Publication date: October 18, 2001Applicant: Merck Patent Gesellschaft mit BeschranktInventors: Tamio Noguchi, Yukitaka Watanabe
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Patent number: 6287377Abstract: A universal tinting concentrate for both solvent- and water-based paints and coatings. The universal tinting concentrate is a composition which includes a colorant component, such as pigment, colorant, tinting agent and/or metal effect agent; a pigment dispersant including an organic acid containing no more an 70 carbon atoms; and a pH-neutralizing agent. In one embodiment of the invention, the pigment dispersant is represented by the following structure: where r and s are integers and r+s is 6 to 16; and x and y are integers and x+y is 0 to 19; and Z is H or COOH and Z′ is H or COOH.Type: GrantFiled: October 13, 1999Date of Patent: September 11, 2001Assignee: The Valspar CorporationInventors: Mark Binns, Dana L. Phillips, Don Diehl, Stephen Korenkiewicz, Larry Brandenburger
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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: 6176919Abstract: The invention is directed to a water-based paint composition comprising sodium silicate, water, water-soluble base, metal oxide pigment, a fused silica and, optionally, a low-melting glass frit, soda-lime-silica glass particles and/or zinc oxide. It may further optionally include surfactants and aluminum hydroxide. The paint composition is particularly useful as a black-out paint on automotive vehicle windshields and has been shown to impart improved stone chip resistance to the glass.Type: GrantFiled: May 11, 1999Date of Patent: January 23, 2001Assignee: Visteon Global Technologies, Inc.Inventor: Claude Franklin Mason
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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: 6156115Abstract: Multilayer interference pigment consisting of a central layer of a transparent or semitransparent material of low refractive index and alternating layers of a metal or of a material of high refractive index and of a material of low refractive index either side of the central layer, the material of low refractive index preferably being magnesium fluoride or acrylate and the metal preferably being aluminium or chromium.Type: GrantFiled: October 26, 1998Date of Patent: December 5, 2000Assignee: Merck Patent Gesellschaft mit beschrankter HaftungInventors: Gerhard Pfaff, Gerd Bauer, Martin Friz, Matthias Kuntz, Christina Schank
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Patent number: 6132743Abstract: A zinc oxide powder having a suppressed photocatalytic activity and prepared by coating a zinc oxide powder with at least one silicone compound in a nongaseous state and firing the coated zinc oxide powder in an oxidizing atmosphere at a temperature of 600 to 950.degree. C. A cosmetic preparation containing this zinc oxide powder is excellent in feel, sebum resistance, and protection against ultraviolet light.Type: GrantFiled: July 6, 1999Date of Patent: October 17, 2000Assignees: Kanebo, Ltd., Daito Kasei Kogyo Co., Ltd.Inventors: Akihiro Kuroda, Yoshinori Waki, Masataka Shimomura
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Patent number: 6126737Abstract: The invention is directed to a dark colored high-solids water-based paint composition comprising sodium silicate, water, water-soluble base, metal oxide pigment, a low-melting glass frit, and optionally, soda-lime-silica glass particles and/or zinc oxide. It may further optionally include surfactants and aluminum hydroxide. The paint composition is particularly useful as a black-out paint on automotive glazings.Type: GrantFiled: December 23, 1998Date of Patent: October 3, 2000Assignee: Visteon Global Technologies, Inc.Inventor: Claude Franklin Mason
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Patent number: 6090373Abstract: Ultraviolet shielding composite fine particles having transparency in a visible light region, comprising matrix particles comprising an aggregate of primary particles having an average particle size of from 0.001 to 0.3 .mu.m, the aggregate being formed while the primary particles retain their shapes; and daughter particles having an average particle size of from 0.001 to 0.1 .mu.m, the daughter particles being dispersed in and supported by the matrix particles, wherein the daughter particles have a smaller band gap energy than the particles constituting the matrix particles and are capable of absorbing ultraviolet light, and wherein the surfaces of the composite fine particles are coated with one or more silicones selected from the group consisting of modified silicones, reactive silicones, and silicone-modified copolymers, and wherein the ultraviolet shielding composite fine particles have substantially no catalytic activities.Type: GrantFiled: August 19, 1998Date of Patent: July 18, 2000Assignee: Kao CorporationInventors: Kentaro Oshima, Shunji Kozaki, Yoshinobu Imaizumi, Toshio Miyake, Keiichi Tsuto
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Patent number: 6086667Abstract: The invention relates, in particular, to pigments in the form of fine particles having enhanced stability with respect to ultraviolet solar radiation and particle radiation (electrons, protons), characterized in that the pigment are coated with a UV filter.Application in the production of paints for spacecrafts.Type: GrantFiled: February 5, 1999Date of Patent: July 11, 2000Assignee: Centre National d'Etudes SpatialesInventors: Jean-Claude Guillaumon, Pascale Veronique Nabarra
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Patent number: 6086666Abstract: An ultraviolet radiation shielding pigment having a high power of shielding of ultraviolet radiation, particularly UV-A, a low cohesive force, and excellent extensibility and adhesiveness as a pigment for cosmetics. A pigment for shielding an ultraviolet radiation which comprises a flaky powder having particle surfaces coated with particles of barium sulfate having an average diameter of 0.1 to 2.0 microns, and with needle crystal particles of zinc oxide having an average major-axis diameter of 0.05 to 1.5 microns, and a process for manufacturing it.Type: GrantFiled: July 2, 1998Date of Patent: July 11, 2000Assignee: Merck Patent Gesellschaft mit beschrankter HaftungInventors: Tamio Noguchi, Yukitaka Watanabe
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Patent number: 6077341Abstract: A silica-metal oxide particulate composite comprising silica agglomerates having voids formed by random stacking of scaly silica primary particles, and metal oxide particulates supported on the surfaces, and the inner surfaces in the voids, of the silica agglomerates.Type: GrantFiled: September 28, 1998Date of Patent: June 20, 2000Assignees: Asahi Glass Company, Ltd., Dohkai Chemical Industry Co., Ltd.Inventors: Kunihiko Terase, Masaharu Tanaka, Masaki Inoue, Eiichi Ono, Takayoshi Sasaki
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Patent number: 6045609Abstract: The invention features in particular white mineral pigments in the form of fine particles having increased stability against solar ultraviolet radiation, characterised in that the pigment particles are coated with an oxidising agent. It is useful in the formulation of white paints for space vehicles.Type: GrantFiled: January 20, 1998Date of Patent: April 4, 2000Assignee: Centre National D'Etudes SpatialesInventors: Jean-Claude Guillaumon, Pascale Veronique Nabarra
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Patent number: 6004391Abstract: Purple pigments according to the invention based on a stovable support material, in particular a glass frit, having a coat applied by coprecipitation of an oxide hydrate of one or more elements from the range comprising Al, Si, Sn, Pb, Ti, Nb, Ta, Sc, Y, La, Ce and Zn and a water-insoluble gold compound or colloidal gold are distinguished from prior art pigments of a similar composition by improved color stability in high temperature firing. The pigments are obtainable in the aqueous phase by coprecipitation of an oxide hydrate and a gold compound or colloidal gold in the presence of a support material and in the absence of a reducing agent. Pigments containing gold compounds assume a purple color on heat treatment or by chemical reduction. Preferred pigments containing gold compounds, which may directly be used as decorative colorants, conveniently develop their color during firing of the decoration.Type: GrantFiled: November 28, 1997Date of Patent: December 21, 1999Assignee: Cerdec Aktiengesellschaft Keramische FarbenInventors: Hans-Peter Letschert, Jenny Wilfert
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Patent number: 5972097Abstract: The invention provides a method for producing colorful inorganic pigments, which comprise complex oxides of various elements, which have good weather resistance and good heat resistance, and which are widely used in colorants for ceramics and in colorants for coatings and plastics. In the method, the composite oxides are sintered at a low temperature for a short period of time to give homogeneous and well colored pigments. Under the sintering conditions, the composite oxides are not sintered excessively. The grinding step in the method is simplified.Type: GrantFiled: October 27, 1997Date of Patent: October 26, 1999Assignee: Ferro Enamels (Japan) LimitedInventors: Toyotaro Maki, Shuzo Mihara, Shigeru Suzuki
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Patent number: 5948147Abstract: A corrosion inhibiting composition for application to a metal substrate such as steel, copper or aluminum includes a film forming organic coating composition and an inorganic pigment which displays synergistic corrosion inhibitive properties. The preferred composition of the corrosion inhibitor pigment includes cation selected from Zn, Al, Mg, Ca, Sr, and ion that a combination of ions including cyanamides, phosphates or phosphites, silicates, carbonates and zinc oxide.Type: GrantFiled: October 2, 1997Date of Patent: September 7, 1999Assignee: Wayne Pigment Corp.Inventor: John Sinko
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Patent number: 5939054Abstract: A sunscreen composition containing a synergic mixture of titanium and/or zinc oxide particles, characterized in that said particles are incorporated in paste-forming oils and/or esters and/or fatty alcohols and/or ethers selected so as to provide a wetting point of the incorporated titanium oxide particles and of the incorporated zinc oxide particles lower than about 5 and a flow point of said incorporatedparticles lower than about 30. The invention also provides a method for preparing said composition and the use thereof for protecting the skin against ultraviolet radiation and for maintaining the monocrystalline dispersion of minerals in the formulation and on the skin.Type: GrantFiled: September 15, 1997Date of Patent: August 17, 1999Assignee: Pierre Fabre Dermo-CosmetiqueInventors: Philippe Msika, Francis Carriere, Jean-Pierre Fabre, France Boyer
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Patent number: 5938834Abstract: The invention is directed to a water-based paint composition comprising sodium silicate, water, water-soluble base, metal oxide pigment, soda-lime-silica glass particles and at least one of a low-melting glass frit or zinc oxide. Preferably, it includes only the glass frit and it further preferably comprises surfactants and aluminum hydroxide. It also is a glass sheet carrying the paint on at least a portion of the sheet.Type: GrantFiled: November 18, 1997Date of Patent: August 17, 1999Assignee: Ford Motor CompanyInventor: Premakaran Tucker Boaz
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Patent number: 5914101Abstract: A stabilised aqueous dispersion of particulate zinc oxide comprises water, a stabilising agent and zinc oxide, the particles of which are coated with dense amorphous silica. Useful stabilising agents include cellulose ethers which contain quaternary ammonium groups and polyalkylene glycols. The dispersions have excellent stability at high concentrations of zinc oxide and are useful for preparing sunscreen formulations, cosmetics and veterinary products.Type: GrantFiled: August 6, 1997Date of Patent: June 22, 1999Assignee: Tioxide Specialties LimitedInventors: Carole Allyson Maria Tapley, Philip Laurence Lyth, Iain Michael Harper
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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: 5900051Abstract: The present invention relates to conditioned pigment particle compositions which are used to color water based materials, such as hydrates, and methods for producing the conditioned pigment particle compositions. The conditioned pigment particles are made by first establishing a pigment color by selecting or combining non-conditioned pigment particles and then mixing the non-conditioned pigment particles having the desired color with an amount of binder to form agglomerated conditioned pigment particles. The conditioned pigment particles produced by the present method have an angle of repose ranging between about 28.degree. and about 34.degree. and a degradation rate of less than 5%.Type: GrantFiled: May 20, 1997Date of Patent: May 4, 1999Assignee: Solomon Grind-Chem Service, Inc.Inventor: Stephen P. Brown
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Patent number: 5891237Abstract: Spherical agglomerates of finely divided material such as inorganic oxides are prepared by admixing a slurry of finely divided material with a solution of a partially neutralised carboxylic acid.Type: GrantFiled: October 8, 1997Date of Patent: April 6, 1999Assignee: Millennium Inorganic Chemicals, Ltd.Inventor: Stephen Phillip Kinniard
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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: 5876688Abstract: A process for preparing zinc oxide comprises introducing, into an atmosphere, an aqueous solution of a zinc salt that is thermally decomposable to zinc oxide, the atmosphere having a temperature sufficient to decompose the salt to the oxide, and recovering zinc oxide. The zinc oxide so-prepared is in the form of discrete particles which can have an average particle size of 0.08 .mu.m or less in diameter and a surface area of at least 12.5 m.sup.2 /g and which is also free of zinc metal. The small particle size zinc oxide is particularly useful as a UV absorbing/scattering additive.Type: GrantFiled: March 6, 1996Date of Patent: March 2, 1999Assignee: Elementis UK LimitedInventor: Roy David Laundon
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Patent number: 5827508Abstract: The present invention relates to compositions which are useful for providing protection to the skin of humans from the harmful effects of ultraviolet radiation. In particular the present invention relates to compositions having improved chemical, physical, and photostability. These compositions comprise from about 0.1% to about 10% of a dibenzoylmethane sunscreen compound, from about 0.1% to about 20% of a surface-treated zinc oxide, and a carrier suitable for application to the skin.Type: GrantFiled: September 27, 1996Date of Patent: October 27, 1998Assignee: The Procter & Gamble CompanyInventors: Paul Robert Tanner, Patricia Ritenour Hertz, Margaret Ann O'Donoghue, Christopher Irwin
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Patent number: 5776239Abstract: An ultrafine titanium dioxide powder is disclosed that can be produced by hydrothermal treating an amino titanium oxalate composition. Ultrafine titanium dioxide powders are useful in cosmetic and other applications for controlling exposure to ultraviolet (UV) light.Type: GrantFiled: August 22, 1997Date of Patent: July 7, 1998Assignee: E. I. Du Pont de Nemours and CompanyInventor: Salvatore Anthony Bruno
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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: 5743952Abstract: A process for improving the rheological properties of an aqueous suspension of a particulate inorganic material which comprises the steps of: (a) forming an aqueous suspension of the particulate inorganic material and an effective amount of an anionic polyelectrolyte dispersing agent; (b) diluting the suspension formed in step (a) with water while maintaining the particulate in the dispersed state of step (a) to give a solids concentration of not less than 20% by weight of the particulate inorganic material; and (c) reconcentrating the diluted suspension formed in step (b) to give a solids concentration of at least 50% by weight of the particulate inorganic material.Type: GrantFiled: November 21, 1996Date of Patent: April 28, 1998Assignee: ECC International Ltd.Inventors: David Robert Skuse, Warren Paul Eagles, Keith Robert Rogan
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Patent number: 5707440Abstract: A finely divided inorganic filler material is a sintered composite which consists of larger macro-filler particles of glass and of smaller micro-filler particles of glass or ceramics partially covering the macro-filler particle and firmly connected to it by sintering. Plastic materials reinforced with the filler are distinguished by improved abrasion resistance.Type: GrantFiled: October 7, 1994Date of Patent: January 13, 1998Assignee: Heraeus Kulzer GmbHInventors: Xu Hengchang, Joachim Nagel
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Patent number: 5702520Abstract: The invention is directed to a method of making a water-based paint composition comprising sodium silicate, water, water-soluble base, metal oxide pigment, soda-lime-silica glass particles and at least one of a low-melting glass frit or zinc oxide. Preferably, it comprises only the low-melting glass frit and further preferably comprises surfactants and aluminum hydroxide. In another aspect, it is also directed to a method of making a formed glazing having a cured coating of the paint composition thereon.Type: GrantFiled: December 20, 1996Date of Patent: December 30, 1997Assignee: Ford Motor CompanyInventor: Premakaran Tucker Boaz
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Patent number: 5698025Abstract: The invention is directed to glass sheets carrying a coating of a water-based paint composition comprising sodium silicate, water, water-soluble base, metal oxide pigment, soda-lime-silica glass particles and, at least one of a low-melting glass frit or zinc oxide. Preferably, it comprises only the glass frit and it further desirably comprises surfactants and aluminum hydroxide.Type: GrantFiled: December 20, 1996Date of Patent: December 16, 1997Assignee: Ford Motor CompanyInventor: Premakaran Tucker Boaz
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Patent number: 5698026Abstract: The invention is directed to a water-based paint composition comprising sodium silicate, water, water-soluble base, metal oxide pigment, soda-lime-silica glass particles and at least one of a low-melting glass frit or zinc oxide. Preferably, it includes only the glass frit and it further preferably comprises surfactants and aluminum hydroxide.Type: GrantFiled: December 20, 1996Date of Patent: December 16, 1997Assignee: Ford Motor CompanyInventor: Premakaran Tucker Boaz
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Patent number: 5677064Abstract: The invention is directed to a water-based paint composition comprising sodium silicate, water, water-soluble base, metal oxide pigment, and glass frit as an adhesion promoter. Preferably, it further comprises zinc oxide, surfactants, and aluminum hydroxide. In other aspects, it is directed to the method of making the composition, and glass sheets having a cured paint field thereon, and the method of making such glass sheets.Type: GrantFiled: March 4, 1996Date of Patent: October 14, 1997Assignee: Ford Motor CompanyInventor: Premakaran T. Boaz
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Patent number: 5672201Abstract: A process for preparing a structured composite pigmentary material comprises forming a dispersion of uncoated particles of titanium dioxide at a pH value at which the particles have a surface charge and subjecting the dispersion to cross-flow filtration until the dispersion contains more than 50% by weight titanium dioxide. The concentrated dispersion is mixed with a dispersion of chemically distinct particles having a surface charge of opposite sign under conditions which ensure that the sign of the surface charge on either of the particulate materials is not reversed. In the resultant composite pigmentary material the titanium dioxide particles are held in association with the chemically distinct particles as a result of said surface charges.Type: GrantFiled: March 5, 1996Date of Patent: September 30, 1997Assignee: Tioxide Group Services LimitedInventors: Leslie Ainsley Simpson, Keith Robson, David Trevor Knight, Ronald Brown
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Patent number: 5656074Abstract: Anticorrosive compositions for use in paints comprise (i) zinc oxide with (ii) the reaction product of an acidic trivalent metal compound and a silicate or (iii) an aluminium/silicate material eg a clay.Type: GrantFiled: April 17, 1995Date of Patent: August 12, 1997Assignee: Albright & Wilson LimitedInventors: John Richard Collier, Kenneth Urmston Holker
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Patent number: 5609852Abstract: The preparation of metal oxide particles having a dye lake precipitated onto their surface in a dye lake:metal oxide ratio of between 10:90 and 80:20 and the use of such particles in cosmetic and toiletry formulations are described.Type: GrantFiled: November 16, 1994Date of Patent: March 11, 1997Assignee: The Boots Company PLCInventors: Edward Galley, Nicola A. Fardell
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Patent number: 5558706Abstract: A corrosion inhibitor pigment composition is based a solid solution of (Ni.sup.2+ +Co.sup.2+)-bis-hydrogen cyanamide.Type: GrantFiled: December 15, 1995Date of Patent: September 24, 1996Assignee: Wayne Pigment Corp.Inventor: John Sinko
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Patent number: 5554215Abstract: A composite particulate pigmentary material is disclosed which comprises an association of at least two chemically distinct materials in which the particles of one material carry a positive surface charge and the particles of the second material carry a negative surface charge and particles are held in association as a result of these surface charges. Also disclosed is a method for preparing composite particulate pigmentary material comprising forming aqueous dispersions of two particulate materials under conditions in which the surface charges of the particles of the two materials are of different signs and mixing the dispersions. Typical materials useful for preparing the composite include inorganic pigments, fillers and extenders and organic polymeric microspheres. The product is useful as a pigment in, for example, paints, inks, paper and plastics.Type: GrantFiled: June 7, 1995Date of Patent: September 10, 1996Assignee: Tioxide Specialties LimitedInventors: Leslie A. Simpson, John Robb, Jonathan Banford, Paul F. Dietz, John Temperley
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Patent number: 5534056Abstract: Radiation-absorptive materials, suitable for fabrication into packages, sheets, inks, paints, decorative surface treatments, lotions, creams, and gels are disclosed. The materials exploit certain optical properties associated with uniform, spherical, nanosize particles to provide complete radiation absorption, over a selected bandwidth, at low concentration. One type of particle exhibits an "absorption edge" at a chosen wavelength, transmitting radiation whose wavelength exceeds the characteristic bandgap wavelength, while effectively absorbing all radiation with wavelengths smaller than that minimum. Another type of particle exhibits "optical resonance," which causes radiation of a characteristic wavelength to interact with the particles so as to produce self-reinforcing internal reflections that strongly enhance the amplitude of the radiation trapped within the particle.Type: GrantFiled: October 28, 1993Date of Patent: July 9, 1996Assignee: Manfred R. KuehnleInventors: Manfred R. Kuehnle, Hermann Statz
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Patent number: 5527386Abstract: Radiation-absorptive materials, suitable for fabrication into packages, sheets, inks, paints, decorative surface treatments, lotions, creams, and gels are disclosed. The materials exploit certain optical properties associated with uniform, spherical, nanosize particles to provide complete radiation absorption, over a selected bandwidth, at low concentration. One type of particle exhibits an "absorption edge" at a chosen wavelength, transmitting radiation whose wavelength exceeds the characteristic bandgap wavelength, while effectively absorbing all radiation with wavelengths smaller than that minimum. Another type of particle exhibits "optical resonance," which causes radiation of a characteristic wavelength to interact with the particles so as to produce self-reinforcing internal reflections that strongly enhance the amplitude of the radiation trapped within the particle.Type: GrantFiled: November 18, 1994Date of Patent: June 18, 1996Assignee: Manfred R. KuehnleInventor: Hermann Statz
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Patent number: 5520847Abstract: A low-velocity electron excited phosphor having a composition represented by a general formula ZnO.multidot.(Al.sub.x, Ga.sub.l-x).sub.2 O.sub.3 :Mn, wherein X=0.001 to 0.3 mol. A content of Al in the phosphor is set be to within a range between 0.001 mol and 0.3 mol. The range permits a variation in luminance of the phosphor to be within .+-.30% and initial luminance of the phosphor to be significantly increased, resulting in the phosphor being suitable for use for a fluorescent display device.Type: GrantFiled: May 24, 1994Date of Patent: May 28, 1996Assignee: Futaba Denshi Kogyo K.K.Inventors: Yoshitaka Satoh, Hitoshi Toki, Fumiaki Kataoka, Shigeo Itoh
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Patent number: 5518535Abstract: The invention is directed to a water-based paint composition comprising sodium silicate, water, water-soluble base, metal oxide pigment, and zinc oxide as an adhesion promoter. Preferably, it further comprises glass frit and surfactants. In other aspects, it is directed to the method of making the composition, and glass sheets having a cured paint field thereon, and the method of making such glass sheets.Type: GrantFiled: March 24, 1995Date of Patent: May 21, 1996Assignee: Ford Motor CompanyInventor: Premakaran T. Boaz
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Patent number: 5496403Abstract: Inorganic oxide pigments (ceramics) are prepared by mixing the starting materials in the presence of water and in the presence or absence of assistants, drying and subsequent calcining in a rotary furnace by processing the starting materials in the presence of water into a pumpable suspension having particle sizes of 50%<10 .mu.m and 100%<50 .mu.m, dewatering the suspension by spray drying it to leave porous granules, and calcining those granules>97% from 20 to 800 .mu.m in size.Type: GrantFiled: August 23, 1990Date of Patent: March 5, 1996Assignee: BASF Lacke + Farben AktiengesellschaftInventors: Harald Gaedcke, Guenter Etzrodt, Egon Liedek
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Patent number: 5487779Abstract: A method of preparing a (Me)bis-hydrogen cyanamide composition with enhanced corrosion preventive activity, wherein Me is a divalent metal selected from the group consisting of nickel and cobalt or mixtures thereof. The method includes precipitating Ni(OH).sub.2 or Co(OH).sub.2 or mixtures thereof, in situ in a liquid reaction medium, containing a soluble cobalt or nickel salt and sodium hydroxide and a stoichiometric excess of H.sub.2 NCN and immediately reacting the resultant precipitate with H.sub.2 NCN. Precipitation of coprecipitated pigment compositions including the aforementioned derivatives and zinc cyanamide is also disclosed.Type: GrantFiled: November 19, 1993Date of Patent: January 30, 1996Assignee: Wayne Pigment Corp.Inventor: John Sinko
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Patent number: 5486233Abstract: A pigment composition includes a pigment extender which optionally contains a pigment, and further includes a non-hydrogenated phospholipid material, such as non-hydrogenated lecithin, and a surface modifying agent. Suitable modifying agents are selected from fatty acids, fatty acid esters or fatty acid triglycerides, silicones and mixtures thereof.Type: GrantFiled: October 28, 1993Date of Patent: January 23, 1996Assignee: Western Mining Corporation LimitedInventors: Lance S. Mitchell, Mary Ann Nordhauser, Justin M. Willis
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Patent number: 5480570Abstract: Cobalt coated, needle shaped berthollide iron oxide pigments are disclosed which have a core of the composition (Fe.sub.x.sup.2+, Fe.sub.2.sup.3+)O.sub.3+x wherein 0.3<x<0.75, optionally also including an intermediate coating of Zn-containing benhollide between the core and the cobalt coating. The pigments are prepared by first coating the core with berthollide and a soluble zinc compound, followed by coating with a cobalt compound.Type: GrantFiled: June 6, 1994Date of Patent: January 2, 1996Assignee: Toda Kogyo Corp.Inventors: Karl-Heinz van Bonn, Hendrik Kathrein, Gerhard Franz
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Patent number: 5456749Abstract: Disclosed is an anti-discoloring pearly luster pigment of white titanium dioxide-coated mica grains wherein; (a) the surfaces of the titanium dioxide and/or titanium oxide hydrate coated mica particles are coated with from 1 to 7 parts by weight, to 100 parts by weight of the titanium dioxide and/or titanium oxide hydrate coated mica particles, of a silicon oxide and/or silicon oxide hydrate; (b) the surfaces of the coated grains are further coated with from 0.5 to 5 parts by weight, to 100 parts by weight of the mica titanium dioxide and/or titanium oxide hydrate coated particles, of an aluminium oxide and/or aluminum oxide hydrate; and (c) the surfaces of the coated particles are still further coated with from 0.5 to 3 parts by weight, to 100 parts by weight of the titanium dioxide and/or titanium oxide hydrate coated mica particles, of a zinc oxide and/or zinc oxide hydrate.Type: GrantFiled: March 1, 1994Date of Patent: October 10, 1995Assignee: Merck Patent Gesellschaft mit beschrankter HaftungInventors: Kazuhisa Iwasa, Katsuhisa Nitta, Tamio Noguchi
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Patent number: 5449403Abstract: A product in the form of colored inorganic particles including one or a number of melanin pigments, a process for its preparation and to its use, especially in the field of cosmetics, for make-up for the exoskeleton and/or for the skin, and in protecting human skin against UV radiation.Type: GrantFiled: January 3, 1994Date of Patent: September 12, 1995Assignee: L'OrealInventors: Herve Andrean, Alex Junino, Jean P. Arraudeau
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Patent number: 5441726Abstract: Disclosed are compositions for application to a surface to protect the surface from ultra-violet radiation, which include zinc oxide particles having a substantially rod shape.Type: GrantFiled: April 28, 1993Date of Patent: August 15, 1995Assignee: SunSmart, Inc.Inventors: Mark Mitchnick, Mamoun Muhammed
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Patent number: 5366660Abstract: An oil dispersion which is substantially transparent to visible light comprises an oil, particles of zinc oxide having an average size of from 0.005 to 0.15 micron and an organic dispersing agent. The solids content of the dispersion is at least 30 weight percent, its extinction coefficients at 308 nm (E(308)) and 360 nm (E(360)) wavelengths are both at least 9 liters per gram per centimeter and the ratio E(360):E(308) is in the range 0.75:1 to 1.5:1.A method of preparing the dispersion is also described in which the ingredients are milled together in the presence of a particulate grinding medium until the required particle size and optical properties are obtained.The dispersions are useful in sun-screening preparations and especially those products designed to provide a balanced protection from UVA and UVB radiation.Type: GrantFiled: September 30, 1992Date of Patent: November 22, 1994Assignee: Tioxide Specialties LimitedInventor: Carole A. M. Tapley