Aluminum Compound Or Silicon Containing Patents (Class 106/442)
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Patent number: 6740312Abstract: Anatase titanium dioxide particles with a size of at most 100 nm wherein the particles are at least partially covered with a layer of at least one metal oxide, hydroxide or hydroxide oxide and the particles exhibit a BET specific surface of at least 70 m2/g and a relative density of the order of 2.2. A process for preparing the anatase dioxide particles is also disclosed.Type: GrantFiled: June 17, 2002Date of Patent: May 25, 2004Assignee: Rhodia ChimieInventors: Thierry Chopin, Dominique Dupuis, Claudie Willemin
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Publication number: 20040094068Abstract: The invention relates to a titanium dioxide pigment mixture comprising a pigment having high greying stability (pigment type A) and a pigment having increased SiO2 and Al2O3 content in flaky precipitation (pigment type B). Said mixture provides, for example in paper, a high level of opacity for sufficient greying stability. If necessary, the light-fastness of the paper can be further increased by means of known production-conditioned measures on pigment type B.Type: ApplicationFiled: August 13, 2003Publication date: May 20, 2004Inventors: J?uuml;rgen Bender, Siegfried Blmel, Volker Schmitt, Brigitte Vielhaber-Kirsch
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Patent number: 6730156Abstract: A filler comprising a substantially amorphous cluster comprising non-heavy metal oxide particles and heavy metal oxide. The filler can be mixed into a hardenable resin to provide radiopaque dental materials having desirable strength and aesthetic character.Type: GrantFiled: October 28, 1999Date of Patent: May 4, 2004Assignee: 3M Innovative Properties CompanyInventors: Mark Steven Windisch, Xiaodong Zhang, Richard Paul Rusin, Sumita Basu Mitra
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Patent number: 6695906Abstract: Titanium dioxide pigments having improved gloss and durability are disclosed. These pigments are prepared by continuous processes, where pH, temperature, and addition times of hydrous silica and alumina coatings are carefully controlled.Type: GrantFiled: April 12, 2001Date of Patent: February 24, 2004Assignee: Millennium Inorganic Chemicals, Inc.Inventors: Michael Hiew, Yarw-Nan Wang, Les Hamor, Brian Tear, Robert McIntyre
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Publication number: 20040007159Abstract: An aluminum pigment composition comprising flaky aluminum, wherein said flaky aluminum as a base material is coated with a coating layer comprising hydrolyzates (a) of a titanium alcoholate represented by the general formula (1):Type: ApplicationFiled: July 17, 2003Publication date: January 15, 2004Inventor: Shigeki Katsuta
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Publication number: 20030235544Abstract: There is provided a pigment surface treated with N-acylglycine hydroxyaluminum and/or N-acyl-N-methylglycine hydroxyaluminum, and a pigment dispersion which contains such surface treated pigment and a cosmetically acceptable oily material, and has an excellent dispersion stability and versatility (ease of dispersion and wide rage of usage).Type: ApplicationFiled: June 25, 2002Publication date: December 25, 2003Inventors: Shigeru Kishida, Mark Lepage, Tetsuo Murata, William Kalriess, Masaru Kobayashi, Isao Imai
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Publication number: 20030223940Abstract: A particulate metal oxide having a mean length of the primary particles in the range from 50 to 90 nm, the mean width of the primary particles in the range from 5 to 20 nm, and the median volume particle diameter of the secondary particles is less than 45 nm. The metal oxide can be used in a sunscreen product that exhibits both effective UV protection and improved transparency.Type: ApplicationFiled: December 20, 2002Publication date: December 4, 2003Applicant: Imperial Chemical Industrial PLCInventors: Graham Paul Dransfield, Susan Cutter, Philip Laurence Lyth
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Patent number: 6648957Abstract: Multilayer pearl lustre pigment on the basis of a platelet-shaped substrate comprising a material of low refractive index in the range from 1.35 to 1.8, which comprises at least (i) one first layer comprising a material having a refractive index of more than 1.8, (ii) optionally, a second layer comprising a material of low refractive index in the range from 1.35 to 1.8, (iii) a semitransparent metal layer which is applied to the substrate or to the layers (i) or (ii), and (iv) if desired, an aftercoating, the substrate being platelet-shaped silicon dioxide, aluminium oxide, boron oxide or magnesium fluoride.Type: GrantFiled: December 4, 2001Date of Patent: November 18, 2003Assignee: Merck Patent GmbHInventors: Stephanie Andes, Gerald Fuchs-Pohl, Gerhard Pfaff
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Patent number: 6648958Abstract: Highly light-scattering pigment mixture featuring (i) 70-99.9% by weight of a component A consisting of spherical silicon dioxide with a diameter of less than 50 &mgr;m, coated with titanium dioxide and optionally a further layer of SiO2, and (ii) 0.1-30% by weight of a component B consisting of spherical silicon dioxide with a diameter of less than 50 &mgr;m, coated with titanium dioxide as a first layer and iron(III) oxide as a second, outer layer, the refractive index of the pigment being adjusted to a value of between 1.45 and 1.65.Type: GrantFiled: November 13, 2002Date of Patent: November 18, 2003Assignee: Merck Patent GesellschaftInventors: Ralf Anselmann, Martin Knapp, Uta Hillgärtner
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Publication number: 20030181329Abstract: A method of producing composite particles of titanium dioxide and a compound inactive as a photocatalyst, comprising the steps of preparing a water based slurry of pH 3 to 5 comprising titanium dioxide, preparing a water based solution comprising a compound inactive as a photocatalyst, and reacting the slurry and the water based solution together at a pH within a range from 4 to 10 is provided, together with highly active photocatalyst particles produced using such a method, and potential uses of such photocatalyst particles.Type: ApplicationFiled: December 19, 2002Publication date: September 25, 2003Applicant: SHOWA DENKO K.K.Inventors: Jun Tanaka, Masayuki Sanbayashi, Yoshinori Ueyoshi
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Patent number: 6620508Abstract: Firstly, a powder matrix is kept in a fluent state, said powder matrix consisting of a first oxide having an absorbed water amount of 0.1 to 50%, an averaged particle diameter of 0.005 to 0.5 &mgr;m and a surface hydroxyl group number of 0.1 to 25 &mgr;mol/m2. Then, one or both of a halide and an alkoxide including metal or semi-metal identical with or different from the metal or semi-metal constituting said first oxide is allowed to contact with said powder matrix kept in the fluent state, by means of an inert carrier gas, and then they are heated at a temperature of from 25 to 800° C., to thereby coat said powder matrix by a coating layer consisting of a second oxide. Further, a reaction by-product consisting of one or both of a hydrogen halide or an alcohol generated by said contacting is heated at a temperature of from 200 to 1000° C. within the inert carrier gas to thereby eliminate the reaction by-product.Type: GrantFiled: September 25, 2001Date of Patent: September 16, 2003Assignee: Nippon Aerosil Co., Ltd.Inventors: Akira Inoue, Eiji Komai, Takeyoshi Shibasaki, Hirokuni Shirono
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Patent number: 6610136Abstract: Aggregated mineral pigments (such as kaolin clay pigments) having a high surface area and useful in coating and filling compositions for ink jet printing media are manufactured by dry grinding an unground mineral composition starting material and then optionally acid treating the ground material.Type: GrantFiled: March 21, 2002Date of Patent: August 26, 2003Assignee: Thiele Kaolin CompanyInventors: Prakash B. Malla, Siva Devisetti
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Publication number: 20030158316Abstract: A curable film-forming composition is provided comprising (i) 10 to 90 percent by weight based on the total weight of resin solids in the film-forming composition of a crosslinking agent; (ii) 10 to 90 percent by weight of a polymer containing a plurality of functional groups reactive with the crosslinking agent; and (iii) 5 to 85 percent by volume of particles having a mean particle size less than 100 nm. The particles comprise 1 to 99 percent by weight of at least one metal oxide wherein the metal is selected from zinc, titanium, cerium, manganese, bismuth, copper, zirconium and iron.Type: ApplicationFiled: February 6, 2003Publication date: August 21, 2003Inventors: Noel R. Vanier, Calum H. Munro
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Patent number: 6605147Abstract: The use of surface-coated rutile modification TiO2 pigments having a primary particle grain size d50 of 0.1 to 1.0 &mgr;m as an anticorrosive white pigment, with firstly magnesium phosphate and secondly aluminum oxides and/or aluminum hydroxides being precipitated onto the TiO2 pigments, is described.Type: GrantFiled: June 14, 2002Date of Patent: August 12, 2003Assignee: Sachtleben Chemie GmbHInventors: Thomas Rentschler, Jochen Winkler
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Patent number: 6599351Abstract: Anticorrosive white pigments useful for inhibiting corrosion include surface-coated TiO2 base bodies, preferably in the rutile modification, having Mn3(PO4)2 and one or more of the substances chosen from aluminum oxides, aluminum hydroxides, aluminum phosphates, aluminum hydrogen phosphates, aluminum dihydrogen phosphates and aluminum polyphosphates are precipitated on to the TiO2 base bodies. Mn3(PO4)2 may be replaced completely or partially by Zn3(PO4)2. Phosphates and/or oxides of cerium may be additionally deposited singly, or several of them may be deposited, on to the TiO2 base bodies.Type: GrantFiled: April 4, 2002Date of Patent: July 29, 2003Assignee: Metallgesellschaft AktiengesellschaftInventors: Thomas Rentschler, Fritz Muller, Jochen Winkler, Wolf-Rudiger Karl, Kirsten Fohr
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Publication number: 20030138386Abstract: A UV screening composition comprising particles which are capable of absorbing UV light so that electrons and positively charged holes are formed within the particles, characterised in that the particles are adapted to minimise migration to the surface of the particles of the electrons and/or the positively charged holes when said particles are exposed to UV light in an aqueous environment.Type: ApplicationFiled: September 30, 2002Publication date: July 24, 2003Inventors: John Sebastian Knowland, Peter James Dobson, Gareth Wakefield
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Patent number: 6596070Abstract: The present invention relates to interference pigments on the basis of multiply coated, platelet-shaped substrates which comprise at least one layer sequence comprising (A) a coating having a refractive index n≧2.0, (B) a colorless coating having a refractive index n≦1.8, and (C) a nonabsorbing coating of high refractive index, and, if desired, (D) an external protective layer.Type: GrantFiled: April 17, 2000Date of Patent: July 22, 2003Assignee: Merck Patent GesellschaftInventors: Christoph Schmidt, Gerhard Pfaff, Christina Schank, Sabine Schoen
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Patent number: 6596074Abstract: The present invention pertains to the use of phosphorescent pigments in cementious materials and allied applications, specifically in use for tile mortars and grouts, pool plasters, wall plasters, cementious roofing materials, cementious surface coatings, cement patches and self leveling compounds. The material will luminesce in the absence of an external source after irradiation with sunlight, visible, ultra-violet (UV) and/or infrared radiation without any degradation in the integrity of the cementious materials from their original applications. The cementious materials need to be capable of being applied by trowel, brush, or spray, forming a strong bond to the surface to which it has been applied. The phosphorescent material should be insoluble in water, compatible with cementious materials, remain fixed in the cementious material, effective at high pH, and produce a long lasting luminescence, for up to 8 to 12 hours, in the visible portion of the spectrum after exposure to a radiation source.Type: GrantFiled: July 20, 2001Date of Patent: July 22, 2003Assignee: Southern Grouts and Mortars, Inc.Inventor: Robert S. Pomeroy
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Patent number: 6582506Abstract: Pigment flakes having cores preferably composed of resins, polymers, thermoplastics, and/or thermosets with colorant (pigment and/or dyes) deposited thereon, coating applications thereof, and a method for making pigment flakes which includes providing a core material, compounding the core material, processing the core material into uniform forms such as films, wires, thread with rectangular cross sections and bead strings, providing colorant material, vaporizing the colorant material, exposing a surface of core material to the vaporized colorant material to form a layer of colorant on thereon, and fracturing the resultant colorant layered core material into flakes.Type: GrantFiled: May 25, 2001Date of Patent: June 24, 2003Assignee: Hampden Papers, Inc.Inventor: Michael E. Archambeault
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Publication number: 20030089278Abstract: The present invention relates to a TiO2 pigment coated sequentially in a wet treatment process with hydrous silica and hydrous alumina both in the presence of citric acid wherein the resulting pigment is coated with from 1 to 4% amorphous alumina based on the weight of the untreated TiO2; from 3 to 6% silica glass based on the weight of the untreated TiO2.Type: ApplicationFiled: October 29, 2002Publication date: May 15, 2003Inventors: Charles Robert Bettler, Michael Patrick Deibold
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Publication number: 20030082123Abstract: Highly light-scattering pigment mixture featuringType: ApplicationFiled: November 13, 2002Publication date: May 1, 2003Applicant: Merck Patent GmbHInventors: Ralf Anselmann, Martin Knapp, Uta Hillgartner
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Publication number: 20030075079Abstract: In a method for the manufacture of a nacreous pigment, in which a multilayer film is produced by vacuum evaporation coating on a substrate and, after release from the substrate, the particles thus produced are comminuted to pigment particles of a desired size, vapor deposition of a plurality of layers taking place at separate locations within an evacuable container and the substrate being passed along the sources of evaporation, it is provided that at least a backing (A), in particular a silicon oxide layer, and at least a metal oxide layer (B), in particular a titanium oxide layer, are vapor-deposited on the substrate, in particular a circulating metal belt.Type: ApplicationFiled: August 5, 2002Publication date: April 24, 2003Inventor: Gunter Sommer
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Patent number: 6544328Abstract: A process for preparing an improved pigment which is readily dispersible in paints and plastics concentrates is provided. In accordance with the process, a particulate pigment is mixed with water to form a slurry thereof, and a surface active agent is mixed with the slurry so that the pigment therein is coated therewith. A preferred surface active agent is a mixture of ethoxylated sorbitan derivatives, non-ethoxylated mono and diglycerides and ethoxylated mono and diglycerides. After the pigment has been coated with the surface active agent, the coated pigment is dried.Type: GrantFiled: January 26, 2001Date of Patent: April 8, 2003Assignee: Kerr-McGee Chemical LLCInventors: Bruce L. Roberts, Jeffrey D. Elliott, Ronnie L. Hoskins, Bruce R. Palmer
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Patent number: 6540824Abstract: The present invention provides a yellow pigment which contains a titanium-iron complex oxide of the pseudo-brookite type and produces a stabilized color more yellowish than conventionally and which is universally usable for coloring plastics, ceramics and coating compositions. The pigment of the invention is a titanium-iron complex oxide pigment which contains a pseudo-brookite complex oxide represented by the composition formula (M1-x•Fex)O•2TiO2 or the composition formula (Fe1-y•Aly)2O3•TiO2 wherein M is one of the bivalent metals Mg, Sr and Zn, the ratios of Fe, Al and M to Ti are in the respective ranges of 0.3≦Fe/Ti≦4.5, 0≦Al/Ti≦6.5 and 0≦M/Ti≦2.6, and x and y are in the respective ranges of 0≦x<1 and 0≦y<1.Type: GrantFiled: February 7, 2002Date of Patent: April 1, 2003Assignee: Ferro Enamels (Japan) LimitedInventors: Takayuki Suzuki, Koji Kataoka
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Publication number: 20030056693Abstract: A colorant for ink-jet printing ink of the present invention, has an average particle diameter of 0.001 to 0.15 &mgr;m, and comprises: extender pigments as core particles; a gluing agent coating layer formed on at least a part of surface of said core particle; and an organic pigment coat uniformly formed on at least a part of said gluing agent coating layer. The colorant for ink-jet printing ink exhibits not only a high tinting strength and a clear hue, but also excellent dispersibility and light resistance in spite of fine particles.Type: ApplicationFiled: June 4, 2002Publication date: March 27, 2003Inventors: Kazuyuki Hayashi, Hiroko Morii, Keisuke Iwasaki
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Publication number: 20030047115Abstract: The invention relates to a platelet-like pigment having high lustre and high covering power or high transparency, consisting of a transparent, inorganic, platelet-like matrix which can contain an additional constituent, characterised in that the additional constituent is a soluble or insoluble colorant and in that the matrix is coated at least on one side with one or more thin, transparent or semi-transparent reflective layers of metal oxides or metals to achieve the lustre.Type: ApplicationFiled: April 15, 1994Publication date: March 13, 2003Inventors: GERD BAUER, KARL OSTERRIED, CHRISTOPH SCHMIDT, REINER VOGT, HELGE-BETTINA KNIESS, MICHAEL UHLIG, NORBERT SCHUL, GUNTHER BRENNER
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Patent number: 6517629Abstract: The present invention provides a process for generating titanium dioxide pigments that have reduced moisture retention. By leaching oxidizer discharge and removing alumina containing compounds, one is able to generate a low volatile pigmentary bases. These low volatile pigmentary bases may be processed into finished low volatile pigments that may be combined with polymers to form polymer matrices. These pigments may be incorporated into polymer matrices at high temperatures without significant lacing.Type: GrantFiled: February 5, 2001Date of Patent: February 11, 2003Assignee: Millennium Inorganic Chemicals, Inc.Inventor: Stephen P. Kinniard
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Patent number: 6508877Abstract: The present invention relates to a process for the production of an aluminum-containing iron oxide crystallization nucleus with a &agr;-FeOOH crystal structure from FeCl2. This nucleus is suitable as starting material for the production of iron oxide red (&agr;-Fe2O3) via &agr;-FeOOH as an intermediate product.Type: GrantFiled: August 31, 2001Date of Patent: January 21, 2003Assignee: Bayer AktiengesellschaftInventor: Ulrich Meisen
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Patent number: 6508290Abstract: The invention relates to a method of preparing an aluminium-containing iron oxide nucleus with an &agr;-FeOOH crystal structure from FeCl2. This nucleus is a suitable starting material for the preparation of iron oxide yellow and for use as a yellow coloring pigment.Type: GrantFiled: August 31, 2001Date of Patent: January 21, 2003Assignee: Bayer AktiengesellschaftInventor: Ulrich Meisen
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Publication number: 20030005859Abstract: The invention relates to multilayered luster pigments based on metallic substrates, which are completely surrounded by a plurality of layers, where these layers comprise at least one layer pack (A) having a colorless dielectric layer of a material with a refractive index n of ≦1.8, and a colorless dielectric layer of a material with a refractive index n of >1.8, and a selectively or non-selectively absorbent layer (B), and to a process for their production, and to their use.Type: ApplicationFiled: June 12, 2002Publication date: January 9, 2003Applicant: Merck Patent GmbHInventors: Stephanie Andes, Gerald Fuchs-Pohl, Martin Friz, Gerhard Pfaff, Siegfried Raabe, Michael Uhlig
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Patent number: 6500251Abstract: Multilayer interference pigment consisting of plateletlike titanium dioxide as carrier material, coated with alternating layers of metal oxides of low and high refractive index, the difference in the refractive indices being at least 0.1, which is obtainable by solidification and hydrolysis of an aqueous solution of a thermally hydrolyzable titanium compound on a continuous belt, detachment of the resulting coat, coating of the resulting titanium dioxide platelets, with or without drying in between, by a wet method with, alternately, a metal oxide hydrate of high refractive index and a metal oxide hydrate of low refractive index by hydrolysis of the corresponding, water-soluble metal compounds, separation, drying and, if desired, calcining of the material obtained.Type: GrantFiled: March 9, 1999Date of Patent: December 31, 2002Assignee: Merck Patent Gesellschaft mit beschrankter HaftungInventors: Stephanie Andes, Gerd Bauer, Günter Brenner, Dieter Brückner, Michael Schmelz, Andrea Heyland, Matthias Kuntz, Karl Osterried, Gerhard Pfaff
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Patent number: 6485656Abstract: Paint detackifiers and/or sedimentation agents are provided which contain amorphous alumina and/or alumina in pseudoboehmite or boehmite form having an average crystallite size of from 0.1 to 15 nm and/or the hydrates and hydroxyalkylpolysaccharides thereof.Type: GrantFiled: February 11, 2000Date of Patent: November 26, 2002Assignee: SASOL Germany GmbHInventors: Arnold Meyer, Jens Juhl, Klaus Noweck
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Publication number: 20020170462Abstract: Provided is an ink for writing instruments which contains an interference pigment as a colorant and is designed to change the color tone of a line drawn with the ink depending on the darkness of a writing surface. The ink for writing instruments therefore contains an interference pigment coated, on the surface of a flaky minute base material, with a metal oxide having a high refractive index.Type: ApplicationFiled: October 2, 2001Publication date: November 21, 2002Applicant: Zebra Co., Ltd.Inventor: Mayumi Terai
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Publication number: 20020166478Abstract: The present invention provides titanium dioxide pigments with improved gloss and/or durability. The titanium dioxide pigments are made by treating titanium dioxide with a plurality of metal salts under conditions suitable to form the titanium dioxide pigment having improved gloss and/or durability, wherein at least one metal salt is capable of providing a monovalent anion. Preferred pigments of the present invention are substantially-sulfate free.Type: ApplicationFiled: March 9, 2001Publication date: November 14, 2002Inventors: Brian Tear, John Stratton, Robert Burniston
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Patent number: 6432869Abstract: Moldings are disclosed for use as a catalyst or catalyst support for hydrating olefin, such as ethylene and propylene. The moldings are based on a pyrogenically produced mixed oxide having the following physicochemical parameters: External diameter 0.8-25 mm BET surface area 5-400 m2/g Pore volume 0.2-1.8 ml/g Fracture strength 5 to 350 N Composition At least two materials selected from the group of SiO2, Al2O3, TiO2 and ZrO2 in any desired combination, with the proviso that when the combination is a SiO2/Al2O3 mixed oxide, at least 75 wt. % of SiO2 is present based on the total weight of the mixed oxide. Other constituents <1 wt. % Bulk density 250-1500 g/l.Type: GrantFiled: September 22, 1999Date of Patent: August 13, 2002Assignee: Degussa AGInventors: Helmfried Krause, Hermanus Gerhardus Josef Lansink Rotgerink, Thomas Tacke, Helmut Mangold, Heike Riedemann, Manfred Fuchs
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Patent number: 6409815Abstract: Surface-modified conductive pigment obtainable by partial coating of a conductive pigment with an organic modifying agent. The modifying agent is an organometallic compound of the elements silicon, tin, titanium, zirconium or aluminum. The pigment is prepared by dispersing a conductive pigment, subsequently adding the modifying agent, if appropriate as a mixture with a solvent, to the pigment dispersion, and in particular in an amount such that the powder electrical conductance of the partly coated conductive pigment is in the range between 80% of the starting value and 10−7 S, removing the solvent present, if appropriate, with further agitation and heating of the pigment to 100° C. and finally drying the partly coated pigment.Type: GrantFiled: April 5, 1995Date of Patent: June 25, 2002Assignee: Merck Patent Gesellschaft mit beschraenkter HaftungInventors: Alfred Hennemann, Manfred Kieser
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Patent number: 6395081Abstract: The present invention provides methods of preparing a titanium dioxide pigment having improved gloss properties which involves heating an aqueous slurry of base titanium dioxide pigment to a temperature below about 75° C., coating the base titanium dioxide pigment with a silica compound at a temperature below about 75° C. to form a silica coated titanium dioxide pigment; and coating the silica coated titanium dioxide pigment with an alumina compound at a temperature below about 75° C. to form the titanium dioxide pigment having improved gloss.Type: GrantFiled: November 3, 2000Date of Patent: May 28, 2002Assignee: Millennium Inorganic Chemical, Inc.Inventors: Michael Hiew, Yarw-Nan Wang, Les Hamor, Brian Tear, Robert McIntyre
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Patent number: 6387498Abstract: A flake-based pigment is provided having improved specular reflectance characteristics in the visible wavelength range. The flake-based pigment has a plurality of core flake sections each formed of a central reflector layer and dielectric support layers on opposing sides of the reflector layer. The resulting core flake section is a very thin three-layered structure that exhibits a uniaxial compressive strength much greater than a corresponding uniaxial tensile strength. This structure provides the benefits of rigidity and brittle fracture during manufacturing and application processes, which ultimately provides favorable planar and specular reflectance characteristics for the pigment in the visible wavelength range. A variety of outer coating layers can be formed around the core flake sections, such as various dielectric and absorber layers having thicknesses dependent upon the desired optical characteristics of the pigment.Type: GrantFiled: April 7, 2000Date of Patent: May 14, 2002Assignee: Flex Products, Inc.Inventors: Kent E. Coulter, Thomas Mayer, Roger W. Phillips, John S. Matteucci
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Patent number: 6383638Abstract: A flake-based pigment is provided having improved specular reflectance characteristics in the visible wavelength range. The flake-based pigment has a plurality of core flake sections each formed of a central reflector layer and dielectric support layers on opposing sides of the reflector layer. The resulting core flake section is a very thin three-layered structure that exhibits a uniaxial compressive strength much greater than a corresponding uniaxial tensile strength. This structure provides the benefits of rigidity and brittle fracture during manufacturing and application processes, which ultimately provides favorable planar and specular reflectance characteristics for the pigment in the visible wavelength range. A variety of outer coating layers can be formed around the core flake sections, such as various dielectric and absorber layers having thicknesses dependent upon the desired optical characteristics of the pigment.Type: GrantFiled: October 13, 2000Date of Patent: May 7, 2002Assignee: Flex Products, Inc.Inventors: Kent E. Coulter, Thomas Mayer, Roger W. Phillips, John S. Matteucci
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Patent number: 6379452Abstract: Calcined kaolin clay pigments having improved color are manufactured by adding a blue agent to the kaolin clay pigment prior to calcination, and then calcining the pigment and blue agent mixture.Type: GrantFiled: March 23, 2000Date of Patent: April 30, 2002Assignee: Thiele Kaolin CompanyInventors: Chris B. Maxwell, Zhenzhong Zhang, Haydn H. Murray
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Patent number: 6358495Abstract: To provide a complex which is excellent in transparency and protective ability of UVB region by containing titanium oxide in a specific silica carrier and a cosmetic preparation which has natural finishing i.e., excellent in transparency by the complex and is excellent in protective ability of UVB region, a titanium-silica complex in accordance with the present invention comprises a silica carrier and titanium oxide, wherein said silica carrier is mainly composed of silicon oxide and wherein titanium oxide is contained in said silica carrier.Type: GrantFiled: March 24, 2000Date of Patent: March 19, 2002Assignee: Shiseido Co., Ltd.Inventors: Shuji Nishihama, Shoichiro Shio
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Publication number: 20020017221Abstract: Titanium dioxide pigments having improved gloss and durability are disclosed. These pigments are prepared by continuous processes, where pH, temperature, and addition times of hydrous silica and alumina coatings are carefully controlled.Type: ApplicationFiled: April 12, 2001Publication date: February 14, 2002Inventors: Michael Hiew, Yarw-Nan Wang, Les Hamor, Brian Tear, Robert McIntyre
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Patent number: 6342099Abstract: The present invention provides a coated titanium dioxide pigment which includes a base titanium dioxide pigment; a first deposit of a phosphate compound contiguous with the base titanium dioxide pigment; a deposit of a silica or zirconia compound contiguous with the phosphate deposit; a second deposit of a phosphate compound contiguous with the silica or zirconia compound; and a deposit of an alumina compound contiguous with the second phosphate deposit. Titanium dioxide pigments of the present invention are easily dispersible, and display excellent durability and gloss.Type: GrantFiled: September 15, 2000Date of Patent: January 29, 2002Assignee: Millennium Inorganic Chemicals, Inc.Inventors: Michael Hiew, Philip Chegwidden
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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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Patent number: 6335083Abstract: Transparent solid, fused microspheres are provided. In one embodiment, the microspheres contain alumina, zirconia, and silica in a total content of at least about 70% by weight, based on the total weight of the solid, fused microspheres, wherein the total content of alumina and zirconia is greater than the content of silica, and further wherein the microspheres have an index of refraction of at least about 1.6 and are useful as lens elements.Type: GrantFiled: April 17, 1998Date of Patent: January 1, 2002Assignee: 3M Innovative Properties CompanyInventors: Toshihiro Kasai, Kenton D. Budd, Stephen L. Lieder, James A. Laird, Chikafumi Yokoyama, Toshinori Naruse, Kenji Matsumoto, Hirohiko Ono
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Patent number: 6294010Abstract: 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 one or more functional pigments, such as electrically conductive pigments, magnetic pigments, IR-reflective pigments or lasermarkable pigments, and to their use in varnishes, paints, printing inks, plastics and powder coatings.Type: GrantFiled: December 23, 1999Date of Patent: September 25, 2001Assignee: Merck Patent Gesellschaft mit Beschrankter HaftungInventors: Gerhard Pfaff, Sabine Schoen, Kaiman Shimizu
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Patent number: 6284034Abstract: A pigment material for use in a coating composition suitable for coating a sheet material to be printed by an electrophotographic printer which pigment material comprises a blend of Components A and B as follows: Component A: a fine pigment material suitable for gloss coating of a sheet material the pigment material comprising particles at least 80% by weight of which have an equivalent spherical diameter (“esd”) of less than 2 &mgr;m and having a particle size distribution (“psd”) such that its d50 value, namely the particle esd value less than which 50% of the particles have an esd, is less than 1 &mgr;m; and Component B: a coarse pigment material having a psd such that its d50 value is from 2 &mgr;m to 10 &mgr;m, desirably 2 &mgr;m to 5 &mgr;m and such that not more than 2% by weight of the particles of the coarse pigment material have an esd greater than 15 &mgr;m, desirably not more than 2% have an esd greater than 10 &mgr;m; wherein the weight ratio of Component A to ComponentType: GrantFiled: July 16, 1999Date of Patent: September 4, 2001Assignee: Imerys Minerals LimitedInventors: Anthony Gordon Hiorns, Janet Susan Preston, James Philip Eynon Jones
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Patent number: 6284032Abstract: Multilayer interference pigment consisting of plateletlike titanium dioxide as carrier material, coated with alternating layers of metal oxides of low and high refractive index, the difference in the refractive indices being at least 0.1, which is obtainable by solidification and hydrolysis of an aqueous solution of a thermally hydrolysable titanium compound on a continuous belt, detachment of the resulting coat, coating of the resulting titanium dioxide platelets, with or without drying in between, by a wet method with, alternately, a metal oxide hydrate of high refractive index and a metal oxide hydrate of low refractive index by hydrolysis of the corresponding, water-soluble metal compounds, separation, drying and, if desired, calcining of the material obtained.Type: GrantFiled: January 11, 2001Date of Patent: September 4, 2001Assignee: Merck Patent GmbHInventors: Stephanie Andes, Gerd Bauer, Günter Brenner, Dieter Brückner, Michael Schmelz, Andrea Heyland, Matthias Kuntz, Karl Osterried, Gerhard Pfaff
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Patent number: 6270566Abstract: A process is disclosed for coloring building materials with inorganic pigments in the form of microgranulates. The granulates comprise one or more pigments and one or more compounds selected from boron, aluminum, silicon, titanium, zinc and tin.Type: GrantFiled: June 6, 1995Date of Patent: August 7, 2001Assignee: Bayer AGInventors: Jakob Rademachers, Günther Teichmann
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Patent number: 6267810Abstract: 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 special-effect pigments, and to their use in varnishes, paints, printing inks, masterbatches, plastics and cosmetic formulations.Type: GrantFiled: December 23, 1999Date of Patent: July 31, 2001Assignee: Merck Patent Gesellschaft mit beschraenkter HaftungInventors: Gerhard Pfaff, Sabine Schoen, Nishimagi Atsuko