Alkali Or Alkaline Earth Metal Containing Patents (Class 106/444)
  • Patent number: 9803063
    Abstract: Nontoxic Near infra-red Reflecting (NIR) inorganic pigments, characteristically blue and well suited for the coloration of a wide variety of substrates, for example, plastics and concrete building roofing material, etc., comprise mixed metal silicate having the general formula: LaxSr1-xCu1-yLiySi4O10, where x is equal to 0 to 0.5 and y is equal to 0 to 0.5. These silicates with tetragonal crystal structure are prepared by calcination method in air atmosphere.
    Type: Grant
    Filed: May 2, 2013
    Date of Patent: October 31, 2017
    Assignee: Council of Scientific & Industrial Research
    Inventors: Mundlapudi Lakshmipathi Reddy, Sheethu Jose
  • Publication number: 20150027344
    Abstract: A composite comprising a silicate material, such as, a sodium aluminosilicate, and titanium dioxide disposed on the surface thereof is disclosed, together with formulations comprising the composite and methods for preparing the same.
    Type: Application
    Filed: October 8, 2014
    Publication date: January 29, 2015
    Inventors: Hilary Ellen Matthews, Ronald Louis Romer
  • Publication number: 20150023899
    Abstract: The present invention relates to a pigment mixture based on spherical particles having a defined particle-size distribution, and to the use thereof in paints, coatings, printing inks, security printing inks, plastics, ceramic materials, glasses, in cosmetic formulations, as tracer, as filler and for the preparation of pigment preparations and dry preparations.
    Type: Application
    Filed: July 17, 2014
    Publication date: January 22, 2015
    Applicant: MERCK PATENT GMBH
    Inventors: Sylke KLEIN, Lilia HEIDER, Carsten LORENZ, Sabine SCHOEN
  • Publication number: 20150000565
    Abstract: Disclosed is a method of surface coating pigment particles, comprising treating uncoated titanium dioxide particles with a reaction product of a silicon oxide with an alkaline earth metal salt to form a coating comprising an oxide of silicon and the alkaline earth metal. The particles may also be treated with aluminum compounds to produce an aluminum oxide in the coating.
    Type: Application
    Filed: June 26, 2013
    Publication date: January 1, 2015
    Inventors: Joseph T. Valko, Michael Zalich, Peter Kamarchik
  • Patent number: 8876965
    Abstract: A composite comprising a silicate material, such as, a sodium aluminosilicate, and titanium dioxide disposed on the surface thereof is disclosed, together with formulations comprising the composite and methods for preparing the same.
    Type: Grant
    Filed: March 11, 2013
    Date of Patent: November 4, 2014
    Assignee: J.M. Huber Corporation
    Inventors: Hilary Ellen Matthews, Ronald Louis Romer
  • Patent number: 8858701
    Abstract: The invention relates to the manufacture of pigment-containing composite pigment particles containing titanium dioxide pigment particles and at least one inorganic and/or organic filler as extender, as well as calcium carbonate that is precipitated in the process, and their use for improving the pigment light-scattering efficiency in coatings, plastics and laminates. The extender is preferably selected from Ca-, Ca—Mg- and Mg-carbonates, natural and synthetic silicon dioxide and oxides and are manufactured in a combined process of precipitation and dispersion. Depending on the combination selected, the use of composite pigment particles according to the invention permits pigment savings with little or no loss of optical properties. Alternatively, if the pigment content remains unchanged, it is possible to achieve better values, e.g. for tinting strength. Particularly, a part or the whole TiO2 quantity in the user system can be replaced by the composite pigment particles according to the invention.
    Type: Grant
    Filed: June 28, 2013
    Date of Patent: October 14, 2014
    Assignee: Kronos International, Inc.
    Inventors: Uwe Wilkenhoener, Frank Mersch
  • Publication number: 20140256866
    Abstract: This invention relates to megakalsilite platelets, methods of hydrothermally forming said platelets and the megakalsilite platelets obtainable via the disclosed hydrothermal method. More specifically the disclosure describes an improved hydrothermal synthesis of megakalsilite platelets, which are suitable as platelet for interference pigments, and in barrier and flame retardant applications.
    Type: Application
    Filed: March 11, 2014
    Publication date: September 11, 2014
    Inventors: Meaghan Clark McGuire, Ivor Bull, Geoffrey Mark Johnson
  • Patent number: 8808447
    Abstract: The present invention relates to a pigment paint for an exterior material and to a method for manufacturing the same. The pigment paint comprises: a flake matrix, a first metal oxide layer coated on the upper portion of the transparent matrix, an oxide layer containing MgO—SiO2 coated on the upper portion of the first metal oxide layer, and a second metal oxide layer coated on the upper portion of the oxide layer. In order to ensure humidity resistance and weather resistance required for a lustrous pigment paint for exterior materials, a cerium layer and an aluminum oxide layer are further coated. Properties such as high luminance, high chromaticity, and high gloss, which could not be achieved using conventional techniques, can be achieved and a pigment paint having a multi-colored pearl luster can be provided.
    Type: Grant
    Filed: March 8, 2012
    Date of Patent: August 19, 2014
    Assignee: CQV Co., Ltd.
    Inventors: Jae-Il Jeong, Nam-Il Lee, Sang-Keun Park, Jin-Hyung Lee, Kwang-Choong Kang, Byung-Ki Choi, Kwang-Soo Lim, Kil-Wan Chang
  • Patent number: 8647429
    Abstract: The present invention relates to effect pigments based on uncoated or coated flake-form substrates having an outer coating comprising a) TiO2 and b) Al2O3, MgO and/or CaO and c) SiO2 and d) ZnO and/or e) at least one mixed oxide of the elements mentioned under a) to d), and to the use thereof, inter alia in paints, coatings, printing inks, plastics and cosmetic formulations.
    Type: Grant
    Filed: February 2, 2011
    Date of Patent: February 11, 2014
    Assignee: Merck Patent GmbH
    Inventors: Sabine Melson, Volker Wilhelm, Ulrich Schoenefeld
  • Publication number: 20140000484
    Abstract: The invention relates to the manufacture of pigment-containing composite pigment particles containing titanium dioxide pigment particles and at least one inorganic and/or organic filler as extender, as well as calcium carbonate that is precipitated in the process, and their use for improving the pigment light-scattering efficiency in coatings, plastics and laminates. The extender is preferably selected from Ca-, Ca—Mg- and Mg-carbonates, natural and synthetic silicon dioxide and oxides and are manufactured in a combined process of precipitation and dispersion. Depending on the combination selected, the use of composite pigment particles according to the invention permits pigment savings with little or no loss of optical properties. Alternatively, if the pigment content remains unchanged, it is possible to achieve better values, e.g. for tinting strength. Particularly, a part or the whole TiO2 quantity in the user system can be replaced by the composite pigment particles according to the invention.
    Type: Application
    Filed: June 28, 2013
    Publication date: January 2, 2014
    Inventors: Uwe Wilkenhoener, Frank Mersch
  • Patent number: 8475581
    Abstract: De-polluting, self-cleaning coating compositions are disclosed which comprise photocatalytic titanium dioxide and a binder comprising an epoxy siloxane polymer. The compositions produce durable, self-cleaning coatings with photocatalytic activity against pollutants in the air, such as NOx compounds.
    Type: Grant
    Filed: February 24, 2011
    Date of Patent: July 2, 2013
    Assignee: Cristal USA Inc.
    Inventors: John Stratton, Graham Goodwin
  • Patent number: 8475582
    Abstract: The present invention relates to a process for making a titanium dioxide pigment consisting of titanium dioxide and single layer of inorganic surface treatment consisting of aluminum phosphate wherein the pigment is characterized by and isoelectric point which is greater than pH 6 and a negative zeta potential of at a pH of 7.5 or more.
    Type: Grant
    Filed: March 6, 2008
    Date of Patent: July 2, 2013
    Assignee: E I du Pont de Nemours and Company
    Inventors: Erik Shepard Thiele, John Davis Bolt, Scott Richard Mehr
  • Publication number: 20130105209
    Abstract: An inorganic filler containing (1) from 50 to 60 parts by weight of SiO2; (2) from 5 to 20 parts by weight of Al2O3; (3) from 0 to 10 parts by weight of CaO; (4) from 15 to 30 parts by weight of B2O3; (5) from 0 to 5 parts by weight of MgO; (6) from 0 to 1 parts by weight of Na2O, K2O or a combination of both; and (7) from 0 to 5 parts by weight of TiO2; based on a total weight of the filler, and having a maximum particle diameter below 100 ?m is introduced. A resin composition containing the inorganic filler and application in printed circuit boards are also introduced. A laminate prepared by the inorganic filler provides a good drilling function, a good dielectric performance and a good high frequency transmission function in high frequency transmission printed circuit board.
    Type: Application
    Filed: November 1, 2012
    Publication date: May 2, 2013
    Applicant: ELITE ELECTRONIC MATERIAL (KUNSHAN) CO., LTD.
    Inventor: Elite Electronic Material (Kunshan) CO., LTD.
  • Publication number: 20120312194
    Abstract: A method for producing a reaction product including at least one synthetic formulation that carbonates sufficiently, said method comprising: providing a first raw material, having a first concentration of M; providing a second raw material, having a second concentration of Me; and mixing the first raw material and the second raw material to produce a reaction product that includes at least one synthetic formulation having the general formula MaMebOc, MaMeb(OH)d, MaMebOc(OH)d or MaMebO(OH)d.(H2O)e, wherein M comprises at least one metal that can react to form a carbonate and Me is at least one element that can form an oxide during the carbonation reaction, wherein the at least one synthetic formulation is capable of undergoing a carbonation reaction, and wherein the at least one synthetic formulation is capable of undergoing volume change during the carbonation reaction.
    Type: Application
    Filed: June 7, 2012
    Publication date: December 13, 2012
    Applicant: RUTGERS, THE STATE UNIVERSITY OF NEW JERSEY
    Inventors: Richard E. RIMAN, Thomas E. NYE, Vahit ATAKAN, Cekdar VAKIFAHMETOGLU, Qinghua LI, Ling TANG
  • Publication number: 20120240823
    Abstract: Pigments formed from glass flakes which have a wide variety of uses, for instance, in paints, in ink jet printing, dyeing textiles, in coatings, printing inks, plastics, cosmetics, glazes for ceramics and glass. Also provided is a glass flake substrate for the pigments.
    Type: Application
    Filed: April 18, 2012
    Publication date: September 27, 2012
    Inventor: Charles Watkinson
  • Publication number: 20100300328
    Abstract: Pigments formed from glass flakes which have a wide variety of uses, for instance, in paints, in ink-jet printing, dyeing textiles, in coatings, printing inks, plastics, cosmetics, glazes for ceramics and glass. Also provided is a glass flake substrate for the pigments.
    Type: Application
    Filed: September 22, 2008
    Publication date: December 2, 2010
    Inventor: Charles Watkinson
  • Publication number: 20090004390
    Abstract: The present invention is directed to pigment compositions, thick film black pigment compositions, conductive single layer thick film compositions, black electrodes made from such black conductive compositions and methods of forming such electrodes, and to the uses of such compositions, electrodes, and methods in flat panel display applications, including alternating-current plasma display panel devices (AC PDP).
    Type: Application
    Filed: June 28, 2007
    Publication date: January 1, 2009
    Inventors: Jerome David Smith, Pedro A. Jimenez, Tony Jackson
  • Patent number: 7455726
    Abstract: The present invention relates to photostabilised effect pigments in which one or more calcined and vanadium-containing oxide layers, alone or mixed with sulfates, borates or phosphates, have been applied to a substrate, to a process for the preparation thereof, and to the use thereof in plastics, paints, coatings, printing inks, cosmetics, films, in security printing, for laser marking, in thermal protection or for colouring seed.
    Type: Grant
    Filed: April 27, 2004
    Date of Patent: November 25, 2008
    Assignee: Merck Patent GmbH
    Inventors: Ulrich Schoenefeld, Padma Kaviratna
  • Publication number: 20080271642
    Abstract: Simplified and improved processes are provided for manufacturing titanium dioxide pigments including a surface treatment whereby a plurality of inorganic oxides or a combination of one or more inorganic oxides with one or more inorganic phosphates are applied to a titanium dioxide base pigment. Aqueous acid-soluble sources of the desired inorganic oxides and/or phosphates are predissolved in an aqueous acid, and these can be added on a batch wise or more preferably on a continuous basis to an alkaline slurry containing the titanium dioxide base pigment and to which aqueous alkaline-soluble sources of the desired inorganic oxides are being or have been added previously. Co-precipitation of the oxides and/or oxides and phosphates is then accomplished by an adjustment of the pH, to provide a surface treated pigment with excellent homogeneity of the deposited mixed oxides and/or oxides and phosphates.
    Type: Application
    Filed: May 3, 2007
    Publication date: November 6, 2008
    Inventors: Daniel H. Craig, Venkata Rama Rao Goparaju
  • Publication number: 20080168924
    Abstract: The present invention relates to pearlescent pigments based on glass flakes which are distinguished by the fact that they have the following layer structure: A) optionally a layer of SiO2, B) a high-refractive-index coating have a refractive-index n>1.8 which essentially consists of TiO2, C) a low-refractive-index layer comprising SiO2 and/or Al2O3 and optionally D) an outer protective layer, and to the use thereof in paints, coatings, automobile paints, powder coatings, printing inks, security printing inks, plastics, ceramic materials, glasses, paper, in toners for electrophotographic printing processes, in seed, in greenhouse sheeting and tarpaulins, as absorbers in the laser marking of paper and plastics, as absorbers for the laser welding of plastics, in cosmetic formulations, for the preparation of pigment pastes with water, organic and/or aqueous solvents, for the preparation of pigment compositions and dry preparations.
    Type: Application
    Filed: August 10, 2005
    Publication date: July 17, 2008
    Inventors: Sabine Melson, Marc Entenmann, Marita Jekel, Marcus Mathias
  • Patent number: 7371276
    Abstract: The titanium dioxide pigment of the present invention contains an anatase type crystal in an amount of 98-100% and has an average particle diameter of 0.2-0.4 ?m and a whiteness of 95-97 in terms of L value of linseed oil. The titanium dioxide pigment of the present invention has characteristics peculiar to anatase type, for example, optical characteristics such as bluish color tone and physical characteristics such as low hardness, and furthermore has high opacity which is not possessed by conventional anatase type titanium oxide pigments.
    Type: Grant
    Filed: August 6, 2003
    Date of Patent: May 13, 2008
    Assignee: Ishihara Sangyo Kaisha, Ltd.
    Inventors: Hideo Takahashi, Toshihiko Akamatsu, Kazuhiro Tominaga, Taku Katou, Yoshio Nagai, Yoshitaka Muraki, Yukako Ota
  • Patent number: 7147702
    Abstract: The invention relates to a method for the surface treatment of a titanium dioxide that leads to pigments with improved retention and improved opacity, where consistently high opacity can be obtained using less pigment. The method is characterised in that an aluminium component and a phosphorus component are first added to a TiO2 suspension, during which process its pH value does not drop below 10. The pH value of the suspension is subsequently lowered to below 9 by adding an acid component. The pigment produced by the method according to the invention is eminently suited to use in decorative laminating paper.
    Type: Grant
    Filed: July 12, 2004
    Date of Patent: December 12, 2006
    Assignee: Kronos International
    Inventors: Lydia Drews-Nicolai, Siegfried Bluemel, Volker Jürgens, Volker Schmitt
  • Publication number: 20040025749
    Abstract: A method and material for improved TiO2 pigment for paper and laminates is described. Phosphorous, titanium, and aluminum compounds are successively added to a TiO2 pigment suspension. Resulting pigments show improved greying resistance and hiding power over prior art pigments, and show improved results as pigments in tests of paper and laminates.
    Type: Application
    Filed: August 8, 2003
    Publication date: February 12, 2004
    Applicant: Kronos International Inc.
    Inventors: Lydia Drews-Nicolai, Siegfried Bluemel, Lothar Elfenthal, Volker Schmitt
  • Publication number: 20030181329
    Abstract: 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: Application
    Filed: December 19, 2002
    Publication date: September 25, 2003
    Applicant: SHOWA DENKO K.K.
    Inventors: Jun Tanaka, Masayuki Sanbayashi, Yoshinori Ueyoshi
  • Patent number: 6620508
    Abstract: 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: Grant
    Filed: September 25, 2001
    Date of Patent: September 16, 2003
    Assignee: Nippon Aerosil Co., Ltd.
    Inventors: Akira Inoue, Eiji Komai, Takeyoshi Shibasaki, Hirokuni Shirono
  • Patent number: 6610136
    Abstract: 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: Grant
    Filed: March 21, 2002
    Date of Patent: August 26, 2003
    Assignee: Thiele Kaolin Company
    Inventors: Prakash B. Malla, Siva Devisetti
  • Patent number: 6540824
    Abstract: 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: Grant
    Filed: February 7, 2002
    Date of Patent: April 1, 2003
    Assignee: Ferro Enamels (Japan) Limited
    Inventors: Takayuki Suzuki, Koji Kataoka
  • Patent number: 6387498
    Abstract: 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: Grant
    Filed: April 7, 2000
    Date of Patent: May 14, 2002
    Assignee: Flex Products, Inc.
    Inventors: Kent E. Coulter, Thomas Mayer, Roger W. Phillips, John S. Matteucci
  • Patent number: 6383638
    Abstract: 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: Grant
    Filed: October 13, 2000
    Date of Patent: May 7, 2002
    Assignee: Flex Products, Inc.
    Inventors: Kent E. Coulter, Thomas Mayer, Roger W. Phillips, John S. Matteucci
  • Patent number: 6335083
    Abstract: 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: Grant
    Filed: April 17, 1998
    Date of Patent: January 1, 2002
    Assignee: 3M Innovative Properties Company
    Inventors: Toshihiro Kasai, Kenton D. Budd, Stephen L. Lieder, James A. Laird, Chikafumi Yokoyama, Toshinori Naruse, Kenji Matsumoto, Hirohiko Ono
  • Patent number: 6270566
    Abstract: 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: Grant
    Filed: June 6, 1995
    Date of Patent: August 7, 2001
    Assignee: Bayer AG
    Inventors: Jakob Rademachers, Günther Teichmann
  • Patent number: 6200376
    Abstract: 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: Grant
    Filed: April 7, 1999
    Date of Patent: March 13, 2001
    Assignee: Toda Kogyo Corporation
    Inventors: Tsutomu Katamoto, Mamoru Fujimoto
  • Patent number: 6103360
    Abstract: A ceiling board coating composition includes water, a binder and a filler, said filler having large particles with an average particle size of a minimum of about 50 microns, medium particles with an average particle size in the range of from about 1.2 to about 30 microns, and small particles which have an average particle size in the range of from about 0.1 to about 1.0 microns.
    Type: Grant
    Filed: January 9, 1998
    Date of Patent: August 15, 2000
    Assignee: Armstrong World Industries, Inc.
    Inventors: Kenneth G. Caldwell, Raymond H. Fernando
  • Patent number: 6077341
    Abstract: 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: Grant
    Filed: September 28, 1998
    Date of Patent: June 20, 2000
    Assignees: Asahi Glass Company, Ltd., Dohkai Chemical Industry Co., Ltd.
    Inventors: Kunihiko Terase, Masaharu Tanaka, Masaki Inoue, Eiichi Ono, Takayoshi Sasaki
  • Patent number: 5989331
    Abstract: A stable aqueous pigment slurry and a process for preparing same. The slurry contains about 50 to 90 wt. %, based on the weight of the slurry, of a pigment such as titanium dioxide and about 0.2 to 3.0 wt. %, based on the weight of the slurry, of a smectite clay such as bentonite, hectorite or montmorillonite. Preferably, the pigment slurry also contains about 0.1 to 2.0 wt. %, based on the weight of the slurry, of a dispersant. The process involves admixing a pigment slurry and a smectite clay slurry and preferably also the dispersant by milling the three components together under high shear conditions.
    Type: Grant
    Filed: May 22, 1997
    Date of Patent: November 23, 1999
    Assignee: Southern Clay Products, Inc.
    Inventors: Carl J. Bauer, John D. Boothe, Frank S. Scimecca, Dwaine E. Siptak
  • Patent number: 5958125
    Abstract: 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: Grant
    Filed: July 5, 1996
    Date of Patent: September 28, 1999
    Inventors: Raimund Schmid, Norbert Mronga
  • Patent number: 5942281
    Abstract: Process for the surface treatment of a titanium dioxide pigment, characterized in that it comprises the following steps:an aqueous suspension of titanium dioxide pigments is formed,in a first step, a layer of alumina phosphate is precipitated on the surface of the pigment,in a second step, a layer of alumina is precipitated over the first layer of alumina phosphate,the pigment is recovered from the suspension;and titanium dioxide pigment, characterized in that it comprises a titanium dioxide core coated successively with a layer of alumina phosphate, then with a layer of alumina and then with a layer of magnesium oxide.
    Type: Grant
    Filed: April 26, 1997
    Date of Patent: August 24, 1999
    Inventors: Anny Guez, Remy Lorang
  • Patent number: 5922120
    Abstract: The present invention provides a process for producing titanium dioxide (TiO.sub.2) pigment having a coating comprising silica and a second oxide selected from the group consisting of oxides of boron, phosphorus, magnesium, niobium, germanium, and mixtures thereof, comprising the steps of (a) reacting titanium tetrachloride (TiCl.sub.4) in the vapor phase with an aluminum compound and an oxygen-containing gas in a reactor at a temperature in the range of about 900.degree. C. to about 1600.degree. C. to provide a gaseous suspension comprising TiO.sub.2 particles, (b) contacting the gaseous suspension comprising the TiO.sub.2 particles with a silicon halide and an oxide precursor of boron, phosphorus, magnesium, niobium, germanium, and mixtures thereof, and (c) cooling the gaseous suspension to produce TiO.sub.2 pigment having a coating comprising silica and a second oxide.
    Type: Grant
    Filed: December 23, 1997
    Date of Patent: July 13, 1999
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Narayanan Sankara Subramanian, Pratibha Laxman Gai, Russell Bertrum Diemer, Jr., Alvin Allen, John Steven Gergely
  • Patent number: 5922121
    Abstract: A surface derivatizing agent is allowed to contact an aqueous slurry of transition metal-containing pigment particles to increase the hydrophobicity of the surface of such particles. The modified pigment particles disperse easily in a wide variety of organic solvents, and provide stable, dispersions having a small mean pigment particle size and narrow particle size distribution.
    Type: Grant
    Filed: May 24, 1996
    Date of Patent: July 13, 1999
    Assignee: Videojet Systems International, Inc.
    Inventor: Wing Sum Vincent Kwan
  • Patent number: 5888291
    Abstract: Alkaline-earth metal- and copper- and optionally titanium-based silicates in the form of agglomerates consisting either of monocrystalline grains or of aggregates themselves consisting of monocrystalline particles.These silicates are prepared by a process including the following stages: a silica sol or a silicate and optionally a titanium sol is mixed with salts of the other constituent elements of the silicate with the exception of oxygen; the mixture thus obtained is dried, preferably by spraying, and the product obtained is calcined. The silicates may be employed as colored pigments in plastics, paints, varnishes, rubbers, ceramics, glazes, papers, inks, cosmetic products, dyes and laminated coatings.
    Type: Grant
    Filed: November 7, 1996
    Date of Patent: March 30, 1999
    Assignee: Rhone-Poulenc Chimie
    Inventors: Thierry Chopin, Pierre Macaudiere
  • Patent number: 5886069
    Abstract: The present invention relates to TiO.sub.2 pigments having TiO.sub.2 particles with substantially discrete inorganic particles dispersed on the surfaces of the TiO.sub.2 particles. Suitable inorganic particles include silica, calcium carbonate, and mixtures thereof. The substantially discrete inorganic particles have an average diameter size within the range of about 5 to about 50 nm and are dispersed on the surfaces of the TiO.sub.2 particles in an amount of less than 20 wt. % based on total pigment weight. This invention also includes coating compositions containing these pigments and processes for making these pigments.
    Type: Grant
    Filed: May 8, 1997
    Date of Patent: March 23, 1999
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: John Davis Bolt
  • Patent number: 5855661
    Abstract: A method for preparing modified pigment particles including contacting an aqueous slurry of metallo, mono and bi-dentate ligand pigment particles with a surface derivatizing agent having one or more phenolic moieties, a 1, 3-diketo moiety or a combination thereof.
    Type: Grant
    Filed: January 18, 1996
    Date of Patent: January 5, 1999
    Assignee: Videojet Systems International, Inc.
    Inventor: Wing Sum Vincent Kwan
  • Patent number: 5840111
    Abstract: The present invention relates to nanodisperse titanium dioxide, to a process for the production thereof and to the use thereof.
    Type: Grant
    Filed: November 8, 1996
    Date of Patent: November 24, 1998
    Assignee: Bayer AG
    Inventors: Gerhard Wiederhoft, Kai Butje, Peter-Joachim Barenthien, Michael Bodiger, Heinrich Alberts
  • Patent number: 5785748
    Abstract: A method for the manufacture of a titanium dioxide pigment comprises mixing a suspension of titanium dioxide with a reagent formed by reacting concentrated phosphoric acid with aluminium or an aluminium compound at elevated temperature and adding an alkaline compound to the suspension until a pH value of at least 3.5 is achieved. A novel pigment which can be prepared by the method of the invention comprises titanium dioxide, the particles of which have a surface coating of aluminium phosphate in which the molar ratio of aluminium to phosphorus lies in the range 1.8:1 to 1:1.4 Al:P. The pigments prepared according to the invention are useful in the preparation of paper laminates.
    Type: Grant
    Filed: June 27, 1996
    Date of Patent: July 28, 1998
    Assignee: Tioxide Group Services Limited
    Inventors: Jonathan Banford, Geoffrey Elliott Maud, Maria Leonida Demosthenous
  • Patent number: 5766336
    Abstract: 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: Grant
    Filed: August 21, 1995
    Date of Patent: June 16, 1998
    Assignee: Cerdec Aktiengesellschaft Keramische Farben
    Inventors: Martin Jansen, Hans-Peter Letschert
  • Patent number: 5728205
    Abstract: The present invention provides a process for producing titanium dioxide (TiO.sub.2) pigment comprising boron oxide (B.sub.2 O.sub.3), comprising the steps of: (a) reacting titanium tetrachloride (TiCl.sub.4) in the vapor phase with an aluminum compound and an oxygen-containing gas in a reactor at a temperature in the range of about 900.degree. C. to about 1600.degree. C. to provide a gaseous suspension comprising TiO.sub.2 particles, and (b) contacting the gaseous suspension comprising the TiO.sub.2 particles with a boron compound to produce TiO.sub.2 pigment comprising B.sub.2 O.sub.3.
    Type: Grant
    Filed: December 11, 1996
    Date of Patent: March 17, 1998
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Alvin Allen, John Steven Gergely
  • Patent number: 5707440
    Abstract: 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: Grant
    Filed: October 7, 1994
    Date of Patent: January 13, 1998
    Assignee: Heraeus Kulzer GmbH
    Inventors: Xu Hengchang, Joachim Nagel
  • Patent number: 5665466
    Abstract: Process for the surface treatment of a titanium dioxide pigment, characterized in that it comprises the following steps:an aqueous suspension of titanium dioxide pigments is formed,in a first step, a layer of alumina phosphate is precipitated on the surface of the pigment,in a second step, a layer of alumina is precipitated over the first layer of alumina phosphate,the pigment is recovered from the suspension;and titanium dioxide pigment, characterized in that it comprises a titanium dioxide core coated successively with a layer of alumina phosphate, then with a layer of alumina and then with a layer of magnesium oxide.
    Type: Grant
    Filed: November 8, 1995
    Date of Patent: September 9, 1997
    Assignee: Rhone-Poulenc Chimie
    Inventors: Anny Guez, Remy Lorang
  • Patent number: 5653794
    Abstract: 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. 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: Grant
    Filed: December 1, 1995
    Date of Patent: August 5, 1997
    Assignee: SCM Chemicals, Inc.
    Inventors: Leon Weber, Robert J. Kostelnik, Charles Wheddon
  • Patent number: 5650002
    Abstract: A TiO.sub.2 pigment particle having a surface coating of inorganic particles or mineral particles exhibiting improved light scattering efficiency of TiO.sub.2 at a moderate to high pigment volume concentration (PVC) and a low oil absorption when incorporated in coatings applications is disclosed, and methods of accomplishing the same.
    Type: Grant
    Filed: November 13, 1995
    Date of Patent: July 22, 1997
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: John Davis Bolt