Clay Containing Or Derived Therefrom Patents (Class 106/416)
  • Patent number: 10214673
    Abstract: The present invention relates to thermally conductive pigments which consist of a substrate and a coating applied thereto comprising aluminum oxide and/or aluminum oxide hydrate, to a process for the preparation of these pigments, and to the use thereof.
    Type: Grant
    Filed: March 5, 2013
    Date of Patent: February 26, 2019
    Assignee: MERCK PATENT GMBH
    Inventors: Reinhold Rueger, Matthias Kuntz
  • Patent number: 10166805
    Abstract: Disclosed is a coated print media having a coating layer formed on at least one surface of a media substrate. The coating layer includes a binder and co-milled particles of precipitated calcium carbonate and zeolite. The specific zeolite used is either Zeolite A or Zeolite X, or combination of both. The co-milled particles are produced by milling precipitated calcium carbonate in the presence of zeolite, whereby the co-milled particles take on the form of aggregates.
    Type: Grant
    Filed: February 13, 2017
    Date of Patent: January 1, 2019
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventor: Christopher Toles
  • Patent number: 10029276
    Abstract: The present invention concerns a print medium for inkjet printing and a method of producing such a print medium. In particular, the present invention is directed to a print medium comprising a base layer having a first side and a reverse side, an absorptive layer being in contact with the first side of the base layer, and a topcoat being in contact with the absorptive layer.
    Type: Grant
    Filed: February 18, 2014
    Date of Patent: July 24, 2018
    Assignee: Omya International AG
    Inventors: Patrick A. C. Gane, Vesa Kukkamo, Catherine Jean Ridgway
  • Patent number: 9920206
    Abstract: Soft feel coating compositions, particularly for plastic substrates, having improved chemical resistance and methods of improving the chemical resistance of soft-feel coatings are provided.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: March 20, 2018
    Assignee: The Sherwin-Williams Company
    Inventor: Heidi M. Benson
  • Patent number: 9920235
    Abstract: Disclosed herein are cement compositions and methods of using set-delayed cement compositions in subterranean formations. In one embodiment, a method of cementing in a subterranean formation is described. The method may comprise providing a set-delayed cement composition comprising water, pumice, hydrated lime, and a set retarder; activating the set-delayed cement composition with a liquid additive to produce an activated cement composition, wherein the liquid additive comprises a monovalent salt, a polyphosphate, a dispersant, and water; and allowing the activated cement composition to set.
    Type: Grant
    Filed: May 23, 2016
    Date of Patent: March 20, 2018
    Assignee: Halliburton Energy Services Inc.
    Inventors: Peter James Boul, Thomas Jason Pisklak, Samuel J. Lewis, Kyriacos Agapiou, Lance Everett Brothers, Pauline Akinyi Otieno, Ronnie Glen Morgan, Baya Adams, Cody Glenn Harris
  • Patent number: 9750828
    Abstract: The invention is directed to bodies comprising an amorphous carbon particle on which are supported nanoparticles of an oxide of lanthanide. These bodies find use as a pharmaceutical for use in a surgery or therapy and diagnostic methods. The bodies can be made by a process comprising impregnating a carbon source material by contacting it with a solution of a salt of the lanthanide; drying the impregnated carbon source material; and subjecting the dried impregnated material to pyrolysis under inert conditions.
    Type: Grant
    Filed: March 27, 2013
    Date of Patent: September 5, 2017
    Assignee: BASF Corporation
    Inventors: Jacobus Hoekstra, Eefjan Breukink, Leonardus Wijnand Jenneskens, John Wilhelm Geus
  • Patent number: 9416278
    Abstract: This invention relates to compositions that are dispersions of pigments in the form of premixes that may be used to color a variety of products such as plastics materials, inks and surface coatings and more particularly to compositions that are thixotropic. It also relates to premixes based on water soluble pigments that display Newtonian rheology. The compositions utilise water insoluble pigments having particle sizes that are less then about 10 microns. Both the thixotropic compositions and the Newtonian compositions include water soluble polyols and water. The pH of the premix may be adjusted to be in the range of 4-9 utilising acid or alkali as appropriate.
    Type: Grant
    Filed: April 19, 2012
    Date of Patent: August 16, 2016
    Inventor: Farshid Saboori
  • Patent number: 9051477
    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: October 8, 2014
    Date of Patent: June 9, 2015
    Assignee: J.M. Huber Corporation
    Inventors: Hilary Ellen Matthews, Ronald Louis Romer
  • Publication number: 20150075740
    Abstract: The present invention provides methods for producing exfoliated clay platelets from a swellable clay material. In embodiments, the method for producing exfoliated clay platelets includes providing an exfoliating agent comprising an anionic extractant, and exposing the swellable clay material to the exfoliating agent, wherein the exfoliating agent produces exfoliated clay platelets from the swellable clay material. Methods for treating paper precursors and paper sheets are also disclosed, as are paper products formed from such paper precursors or paper sheets.
    Type: Application
    Filed: August 12, 2014
    Publication date: March 19, 2015
    Inventors: Gangadhar Jogikalmath, Andrea Schneider, David S. Soane
  • 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
  • Publication number: 20140275347
    Abstract: A nano-clay material that exhibits improved compatibility with polymers is described. The nano-clay material may be mixed with polymers to produce a nano-clay polymer nanocomposite material including reduced levels of clay loading. Methods for making the nano-clay nanocomposite material and articles of manufacture from the nanocomposite material are also described.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Applicant: NANOSCIENCE ENGINEERING CORPORATION
    Inventors: Pranav Nawani, David E. Burnett, Roy G. Crawford
  • Patent number: 8828188
    Abstract: The present invention relates to a filler comprising clay and cellulose derivative having a degree of substitution of net ionic groups up to about 0.65.
    Type: Grant
    Filed: July 27, 2012
    Date of Patent: September 9, 2014
    Assignee: Akzo Nobel N.V.
    Inventors: Erik Sanne, Rune Kjell Andersson, Johan Nyander
  • Patent number: 8778140
    Abstract: A method of preparing a stable dispersion of flocculated filler particles for use in papermaking processes comprises use of microparticle prior to, simultaneous to, and/or after addition of a first flocculating agent to an aqueous dispersion of filler particles, followed by addition of a second flocculating agent to the dispersion and further optional shearing of the resultant filler flocs to the desired particle size resulting in shear resistant filler flocs with a defined and controllable size distribution. In addition, a neutralizing coagulant can be added to the dispersion to partially or completely neutralize the charge of the filler before the microparticle and/or the first flocculating agent is added.
    Type: Grant
    Filed: November 1, 2012
    Date of Patent: July 15, 2014
    Assignee: Nalco Company
    Inventors: Weiguo Cheng, Katherine M Broadus, Dorota Smoron, Shawnee M Wilson
  • Publication number: 20140096702
    Abstract: A basecoat including a pigment blend including a calcined clay component and a hyper-platy clay component, wherein the hyper-platy clay component has a shape factor of at least about 40:1, and wherein the pigment blend has a sediment void volume of at least about 50 percent.
    Type: Application
    Filed: December 17, 2013
    Publication date: April 10, 2014
    Applicant: MeadWestvaco Corporation
    Inventors: Steven G. Bushhouse, Terry L. Clark, Gary P. Fugitt, James P.E. Jones, Anthony V. Lyons, Roger W. Wygant
  • Patent number: 8647472
    Abstract: The invention provides a method of producing paper with a higher proportion of mineral filler particles than is otherwise be possible without the expected loss in paper strength by preflocculating the filler particles. The method allows for the use of the greater amount of filler particles by coating at least some of the filler particles with a material that prevents the filler materials form adhering to a strength additive. The strength additive holds the paper fibers together tightly and is not wasted on the filler particles.
    Type: Grant
    Filed: March 19, 2010
    Date of Patent: February 11, 2014
    Assignee: Nalco Company
    Inventors: Weiguo Cheng, Ross T. Gray
  • Patent number: 8598262
    Abstract: The present invention provides methods, admixture compositions for treating clay-bearing aggregates used for construction purposes, and aggregate compositions for construction purposes. The clay-bearing aggregates are treated with a cationic copolymer made from two and preferably three different monomer components. Cementitious compositions containing the treated aggregates are also described.
    Type: Grant
    Filed: May 13, 2013
    Date of Patent: December 3, 2013
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Lawrence L. Kuo, Ying Chen
  • Patent number: 8568808
    Abstract: An intercalated layered silicate comprises a layered silicate and an intercalating agent sorbed between the silicate layers of the layered silicate. The amount of intercalating agent is effective to provide an average interlayer spacing between the silicate layers of at least about 20 ?. The intercalating agent has a formula selected from formulas I through VII described herein. The intercalated layered silicate may be exfoliated by mixing it with a matrix medium and adding sufficient energy to form a dispersed-particle composition. A packaging film, such as a food packaging film, may comprise the dispersed-particle composition.
    Type: Grant
    Filed: December 2, 2005
    Date of Patent: October 29, 2013
    Assignee: Cryovac, Inc.
    Inventors: Michael D. Grah, Michael L. Becraft, Drew V. Speer, Gary W. Beall, Jeremy Bartels
  • Patent number: 8461245
    Abstract: The present invention provides methods, admixture compositions for treating clay-bearing aggregates used for construction purposes, and aggregate compositions for construction purposes. The clay-bearing aggregates are treated with a cationic copolymer made from two and preferably three different monomer components. Cementitious compositions containing the treated aggregates are also described.
    Type: Grant
    Filed: February 15, 2011
    Date of Patent: June 11, 2013
    Assignee: W.R. Grace & Co.-Conn.
    Inventors: Lawrence L. Kuo, Ying Chen
  • Publication number: 20130091803
    Abstract: Provided herein are various bathers and methods of making and using them. In some embodiments, the barriers include a porous crystalline charge-transfer complex and a filler.
    Type: Application
    Filed: October 18, 2011
    Publication date: April 18, 2013
    Applicant: EMPIRE TECHNOLOGY DEVELOPMENT LLC
    Inventor: Takashi Iwamoto
  • Patent number: 8404084
    Abstract: A filler treatment process enhances the fixation of anionic latex on filler in a short time. Anionic polymer dispersions (latex) are added to papermaking filler slurries at ambient temperature and then mixed with water of temperature higher than the glass transition temperature (Tg) of the latex used. The anionic latexes applied by this process are totally and irreversibly fixed or bound onto the filler particles and the treated filler particle agglomerate to form an aggregated filler slurry which is stable over time. The latex-treated filler slurry can be added to papermaking furnishes at any point prior to the headbox of the paper machine or stored for later use. The latex-treated filler slurry improves filler retention, only slightly reduces sheet strength and improves sizing performance.
    Type: Grant
    Filed: August 30, 2011
    Date of Patent: March 26, 2013
    Assignee: FPInnovations
    Inventors: Makhlouf Laleg, Roderick Collins, Danielle Gagne, Steven Middleton
  • Patent number: 8343312
    Abstract: Process for the production of filler-containing papers and filler-containing paper products by addition of an aqueous suspension of at least one finely divided polymer-pigment hybrid to a paper stock and drainage of the paper stock with sheet formation, the polymer-pigment hybrid being obtainable by milling an aqueous suspension of at least one inorganic pigment in the presence of at least one binder and, if appropriate, by drying the aqueous suspension thus obtainable and redispersing the dried polymer-pigment hybrid in water, and the use of the polymer-pigment hybrids thus obtainable as a filler for the production of filler-containing paper or filler-containing paper products.
    Type: Grant
    Filed: May 24, 2006
    Date of Patent: January 1, 2013
    Assignee: BASF Aktiengesellschaft
    Inventors: Norbert Mahr, Dieter Meck, Rainer Blum, Ralf Hemel, Norbert Gispert, Juergen Schmidt-Thuemmes, Christoph Hamers
  • Patent number: 8252143
    Abstract: The present invention relates to a filler comprising clay and cellulose derivative having a degree of substitution of net ionic groups up to about 0.65.
    Type: Grant
    Filed: June 10, 2005
    Date of Patent: August 28, 2012
    Assignee: Akzo Nobel N.V.
    Inventors: Erik Sanne, Rune Kjell Andersson, Johan Nyander
  • Patent number: 8172983
    Abstract: A method of preparing a stable dispersion of flocculated filler particles for use in papermaking processes comprises sequential addition of high and low molecular weight flocculating agents to an aqueous dispersion of filler particles followed by shearing of the resultant filler flocs to the desired particle size resulting in shear resistant filler flocs with a defined and controllable size distribution.
    Type: Grant
    Filed: September 12, 2007
    Date of Patent: May 8, 2012
    Assignee: Nalco Company
    Inventors: Weiguo Cheng, Ross T. Gray
  • Patent number: 8092586
    Abstract: Described herein is a photocatalytic composite comprising a titanium dioxide supported on metakaolin. In comparison to known embodiments of the sector, the composite of the present invention makes it possible to obtain binders and derived products with high photocatalytic efficiency, even when using photocatalyst quantities which are lesser than those present in products of prior technical art.
    Type: Grant
    Filed: December 17, 2008
    Date of Patent: January 10, 2012
    Assignee: Italcementi S.p.A.
    Inventors: Renato Ancora, Massimo Borsa, Luigi Cassar
  • Patent number: 8088213
    Abstract: A method of preparing a stable dispersion of flocculated filler particles for use in papermaking processes comprises sequential addition of a first flocculating agent to an aqueous dispersion of filler particles followed by shearing of the dispersion, followed by addition of a second flocculating agent to the dispersion and further shearing of the resultant filler flocs to the desired particle size resulting in shear resistant filler flocs with a defined and controllable size distribution. In addition, a neutralizing coagulant can be added to the dispersion to partially or completely neutralize the charge of the filler before the first flocculating agent is added.
    Type: Grant
    Filed: April 28, 2009
    Date of Patent: January 3, 2012
    Assignee: Nalco Company
    Inventors: Weiguo Cheng, Ross T. Gray
  • Patent number: 8083846
    Abstract: A color effect material is described as composed of a plurality of encapsulated substrate platelets in which each platelet is encapsulated with a highly reflective layer which acts as a reflector to light directed thereon and a spacer pigment layer which is selectively transparent to light directed thereon.
    Type: Grant
    Filed: August 18, 2004
    Date of Patent: December 27, 2011
    Assignee: BASF Corporation
    Inventors: Curtis J. Zimmermann, James D. Christie, Vivian K. Doxey, Daniel Stevenson Fuller
  • Patent number: 8083848
    Abstract: Disclosed herein are kaolin compositions, such as beneficiated fine sedimentary kaolin compositions. The beneficiated fine sedimentary kaolins may be obtained from the upper bed of the Rio Capim Kaolin deposit. The compositions may have at least one property chosen from a low iron content and low Hinckley crystallinity index, such as Fe2O3 in an amount less than about 0.8% by weight relative to the total weight of the solids content and wherein the Hinckley crystallinity index of the kaolin is less than about 0.5. Also disclosed are products obtained therefrom, such as paint and paper coating compositions.
    Type: Grant
    Filed: February 8, 2006
    Date of Patent: December 27, 2011
    Assignee: Imerys Pigments, Inc.
    Inventors: Robert J. Pruett, Paula R. Alves
  • Publication number: 20110297044
    Abstract: In an embodiment, an oligoaniline exfoliating agent, as shown in Formula (I), is provided. In Formula (I), R is —H or —NH2, and n is 3 to 30. In another embodiment, exfoliated platelet-shaped clay including the oligoaniline exfoliating agent and a method for preparing the exfoliated platelet-shaped clay are provided.
    Type: Application
    Filed: November 22, 2010
    Publication date: December 8, 2011
    Inventors: Tsung-Yen TSAI, Chun-Yi Lee
  • Patent number: 7993443
    Abstract: A multilayer effect pigment includes a transparent substrate, a layer of high refractive index material on the substrate, and alternating layers of low refractive index and high refractive index materials on the first layer, the total number of layers being an odd number of at least three, all adjacent layers differing in refractive index by at least about 0.2 and at least one of the layers having an optical thickness which is different from all of the other layers. The resulting multilayer effect pigment is not a quarter-wave stack. The present multilayer effect pigment may be used in cosmetics or personal care products.
    Type: Grant
    Filed: February 10, 2006
    Date of Patent: August 9, 2011
    Assignee: BASF Catalysts LLC
    Inventors: Daniel S. Fuller, Curtis J. Zimmermann
  • Patent number: 7993444
    Abstract: A multilayer effect pigment includes a transparent substrate, a layer of high refractive index material on the substrate, and alternating layers of low refractive index and high refractive index materials on the first layer, the total number of layers being an odd number of at least three, all adjacent layers differing in refractive index by at least about 0.2 and at least one of the layers having an optical thickness which is different from all of the other layers. The resulting multilayer effect pigment is not a quarter-wave stack. The present effect pigments may be used in cosmetic and industrial applications.
    Type: Grant
    Filed: October 19, 2006
    Date of Patent: August 9, 2011
    Assignee: BASF Catalysts LLC
    Inventors: Daniel S. Fuller, Curtis J. Zimmermann
  • Patent number: 7875213
    Abstract: A mineral slurry comprises mineral particles in an amount equal to or greater than about 60 percent by total weight of the slurry, wherein 85 percent of the mineral particles have an average particle size equal to or less than 2 micrometers; a polyelectrolyte dispersant derived from an acrylate polymer formed by reversible addition-fragmentation chain transfer polymerization, wherein the polyelectrolyte dispersant comprises endgroups comprising thio-containing residues derived from a trithiocarbonate chain transfer agent, wherein the polyelectrolyte dispersant is in an amount less than about 35 pounds of the dispersant per ton of dry mineral particles, and wherein the polyelectrolyte dispersant has a molecular weight of 3000 to 10,000 Daltons and a polydispersity of at least 1.0 and less than 1.5; and the remainder water.
    Type: Grant
    Filed: July 14, 2008
    Date of Patent: January 25, 2011
    Assignee: Kemira Oyj
    Inventor: Thomas J. Lynch
  • Patent number: 7803224
    Abstract: A paper coating includes a combination of a primary pigment and a secondary pigment. The primary pigment includes anionic particles having a particle size distribution where at least 96% of the particles by weight have a particle size less than 2 microns. The secondary pigment is a cationic, grit-free pigment having an average particle size of 3 microns or less. The coating also includes up to 17 weight % of a hydrophilic styrene-butadiene latex based on the weight of the dry pigments and a co-binder. Another embodiment of this invention is a coated base sheet that includes a base sheet to which the above coating has been applied.
    Type: Grant
    Filed: March 27, 2007
    Date of Patent: September 28, 2010
    Assignee: Newpage Wisconsin System, Inc.
    Inventors: Leonard J. Schliesman, James P. Niemiec, Fikret Kaya, Robert S. Van Helden
  • Patent number: 7781509
    Abstract: A modified clay may be made by contacting a clay with an unsaturated cationic compound and an alkoxyamine, or an adduct thereof. The resulting pre-activated clay, which contains a cationic alkoxyamine bound to the clay, may be further treated with a monomer to provide a polymer that is bound to the clay, thereby forming a nanocomposite material. The nanocomposite material may in turn be blended with another polymer prepared from the same or a different monomer.
    Type: Grant
    Filed: October 16, 2008
    Date of Patent: August 24, 2010
    Assignee: Arkema Inc.
    Inventors: Nicholas J. Rodak, Brian Edgecombe, Noah E. Macy
  • Publication number: 20100186917
    Abstract: The present invention relates to a filler composition comprising a) a filler, b) a cationic inorganic compound, c) a cationic organic compound, and d) an anionic polysaccharide, wherein the filler is present in an amount of at least about 1% by weight, based on the total weight of the composition, the anionic polysaccharide is present in an amount of about 1 to about 100 kg/ton, based on the weight of filler, and wherein the composition is substantially free from fibers.
    Type: Application
    Filed: July 14, 2008
    Publication date: July 29, 2010
    Applicant: AKZO NOBEL N.V.
    Inventors: Patrik Simonson, Michael Persson
  • Patent number: 7758688
    Abstract: The present invention relates to a composition comprising calcined kaolin having a narrow particle size distribution. The composition can have many uses, such as fillers or extenders in paint, plastics, polymers, papermaking, and coating compositions. More generally, the inventive products may be used wherever calcined kaolins are used.
    Type: Grant
    Filed: March 16, 2004
    Date of Patent: July 20, 2010
    Assignee: Imerys Kaolin, Inc.
    Inventors: Edward J. Sare, Tommy Adkins
  • Patent number: 7745003
    Abstract: The present invention relates to particles having a functional multilayered structure based on substrates, characterized in that the substrates are coated with one or more layers of one or more polymers and one or more layers of one or more silanes, process for the production thereof, and the use thereof.
    Type: Grant
    Filed: January 15, 2005
    Date of Patent: June 29, 2010
    Assignee: Merck Patent GmbH
    Inventors: Alfred Hennemann, Marc Entenmann, Margarete Müller, Renate Bonn-Walter, Adalbert Huber, Ulrich Schoenefeld
  • Patent number: 7699927
    Abstract: The invention relates to pearlescent pigments comprising platelet-shaped substrate, comprising metal oxide, and protective layer, said metal oxide having a refractive index of more than 1.8, where the protective layer is composed of an organic chemically surface modified SiO2 layer, the organic chemical surface modification being applied on the SiO2 layer. The invention further relates to a process for preparing these pearlescent pigments and to their use.
    Type: Grant
    Filed: August 26, 2005
    Date of Patent: April 20, 2010
    Assignee: Eckart GmbH
    Inventors: Frank Henglein, Ulrich Schmidt
  • Patent number: 7628850
    Abstract: A process for producing high grade metakaolin directly from kaolinzed sands ore body. In one embodiment, a source of kaolin ore is reduced in the size to a size distribution of between ?2 inches and 10 mesh. The ore is then dried in a dryer at a temperature of not greater than 180° C. to a moisture content of not greater than 0.5% by weight to liberate kaolin and calcined at a temperature of not greater than 875° C. to produce metakaolin.
    Type: Grant
    Filed: October 25, 2006
    Date of Patent: December 8, 2009
    Assignee: Whitemud Resources Inc.
    Inventors: Robin Phinney, Kelly Graham, Kevin Graham, Burl Aycock
  • Patent number: 7611574
    Abstract: The invention relates to an interference pigment with a high covering power, comprising at least one FeTiO3-containing layer, which is applied to a lamellar inorganic substrate and whose thickness and absorbing power can be precisely set. The invention also relates to a method for producing this interference pigment and to the use thereof.
    Type: Grant
    Filed: May 5, 2004
    Date of Patent: November 3, 2009
    Assignee: Merck Patent Gesellschaft Mit Beschrankter Haftung
    Inventors: Helge Kniess, Gerhard Pfaff, Klaus Bernhardt
  • Publication number: 20090255442
    Abstract: A pearlescent pigment and a process for enhancing the magnetic properties of a pearlescent pigment. The pearlescent pigment has a layer with regions of ?-Fe2O3 and regions of ?-Fe2O3. The magnetic properties of a pearlescent pigment may be enhanced by the steps of: providing a platelet pigment with a layer of Fe2O3, with a magnetic susceptibility less than 0.1×10?5 m3/kg; reducing some or all of the Fe2O3 to Fe3O4; and oxidizing some or all of the Fe3O4 to ?-Fe2O3. The color difference (?E*) between the provided pigment and the resultant pigment is not more than about 5.
    Type: Application
    Filed: April 9, 2008
    Publication date: October 15, 2009
    Inventors: Aaron M. Hollman, Philippe Schottland
  • Patent number: 7601212
    Abstract: Processes for altering surface properties of pigment particles are provided. The processes include coating the particles with ionic natural polysaccharides or ionic derivatives of natural polysaccharides, providing enhanced properties.
    Type: Grant
    Filed: August 28, 2006
    Date of Patent: October 13, 2009
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Subramaniam Sabesan, John Davis Bolt
  • Patent number: 7597755
    Abstract: A pigment product for use in a coating composition to provide a gloss coating on paper, the pigment product comprising a processed particulate kaolin having a particle size distribution such that at least about 80% by weight of the particles have an equivalent spherical diameter less than about 2 p,m and in the range of from about 10% to about 20% by weight of the particles have an equivalent spherical diameter less than about 0.25 wm, the particles have a shape factor in the range of from about 20 to about 36 and the particles have a particle steepness in the range of about greater than about 35, more preferably in the range of about 35 to about 40, and wherein the kaolin is derived from a secondary kaolin source.
    Type: Grant
    Filed: August 15, 2003
    Date of Patent: October 6, 2009
    Assignee: Imerys Pigments, Inc.
    Inventors: David L. Light, Christopher R. L. Golley, Ernest Gay, Milton Constantin
  • Publication number: 20080264295
    Abstract: A method for increasing the brightness of metakaolins comprises calcining a metakaolin under reducing conditions. The calcined metakaolins are suitable for use in a variety of applications including in polymer products and paints.
    Type: Application
    Filed: February 7, 2006
    Publication date: October 30, 2008
    Applicant: IMERYS MINERALS LIMITED
    Inventors: Richard James Taylor, Darren Francis Grose
  • Patent number: 7419538
    Abstract: Highly anti-corrosive thin-platelet like metal pigments having high corrosion resistance and good dispersibility characterized in that the inherent metallic luster of the thin-platelet like metal substrates is maintained without demanding the original surface smoothness are provided. The highly anti-corrosive thin-platelet like metal pigments comprising, on the surface of thin-platelet like metal substrates treated with phosphoric acid compounds and/or boric acid compounds, one or more coated layers containing one or more hydrated metal oxides of one or more metals selected from the group consisting of silicon, aluminum, zirconium, titanium and tin.
    Type: Grant
    Filed: July 1, 2002
    Date of Patent: September 2, 2008
    Assignee: Merck Patent GmbH
    Inventors: Bangyin Li, Nobuaki Nakamura, Katsuhisa Nitta
  • Patent number: 7413599
    Abstract: The invention relates to pearlescent pigments with a platelet-shaped substrate comprising metal oxide and having a first and a second protective layer, said metal oxide having a refractive index of greater than 1.8, there being on the platelet-shaped substrate a first protective layer comprising cerium oxide and/or cerium hydroxide and a second protective layer of SiO2, applied to which is an organic chemical aftercoat comprising at least one silane having at least one functional bond group and at least one silane without a functional bond group, it being possible for metal oxide layers other than cerium oxide and SiO2 to be disposed between the first and the second protective layer. The invention further relates to a process for preparing these pigments, and to the use thereof.
    Type: Grant
    Filed: August 26, 2005
    Date of Patent: August 19, 2008
    Assignee: Eckart GmbH & Co. KG
    Inventors: Frank Henglein, Ulrich Schmidt, Peter Krüger, Günter Kaupp
  • Patent number: 7414089
    Abstract: The present invention is related to methods and compositions for marking and removing turf lines and other markings from artificial and natural turf, including sports fields. The marking compositions include alkali-activatible acrylics, including one or both of alkali-soluble resin and an alkali-swellable thickener to enable removing the dried composition with an alkaline solution.
    Type: Grant
    Filed: April 25, 2003
    Date of Patent: August 19, 2008
    Assignee: Eco Chemical, Inc.
    Inventors: Mark K. Cheirrett, Walter Sadowski
  • Publication number: 20080035017
    Abstract: The present invention relates to a process for preparing a pearl pigment, comprising the steps of (a) adding an aqueous solution of metal oxide to a substrate in a reactor and (b) adding ammonium bicarbonate aqueous solution as a precipitating agent.
    Type: Application
    Filed: December 11, 2006
    Publication date: February 14, 2008
    Applicant: Hyundai Motor Company
    Inventor: Eun Young Chung
  • Publication number: 20080028989
    Abstract: A method for removing organic-related compounds from a naturally-occurring or synthetic target material containing at least one permeable inorganic material capable of mineral or mineral phase change or dehydration and at least one amorphous carbon, graphite or another organic compound comprising exposing the material to microwave or radio frequency radiation so as to remove at least a portion of the organic ingredients through combustion while limiting the modification of the structure or mineral composition or mineral phase of the inorganic component.
    Type: Application
    Filed: July 20, 2006
    Publication date: February 7, 2008
    Inventor: Scott Kevin Palm
  • Patent number: 7261770
    Abstract: In various embodiments, a pigment composition is provided comprising a base particle and a dispersing agent, the dispersing agent comprising a salt and/or ester of: (i) an amine, alcohol, and/or alkanol amine and (ii) a polyprotic acid, wherein the mole ratio of the amine, alcohol, and/or alkanol amine to the polyprotic acid is greater than 3:1. In various embodiments, the pigments have improved stability, hiding power, tint strength, and/or gloss.
    Type: Grant
    Filed: November 24, 2004
    Date of Patent: August 28, 2007
    Assignee: Millennium Inorganic Chemicals, Inc.
    Inventors: Modasser El-Shoubary, Robert M. Hopkins, Karen L. Bowen, David E. Bell
  • Patent number: 7208039
    Abstract: The present invention relates to a hydrous kaolin product having improved optical properties, for example, when used in the production of paper products. The present invention comprises an improved barrier coating for paper and a method of making the coated paper. The present invention also comprises an improved method from making filled and coated paper products. The present invention uses a composition comprising kaolin having a shape factor of at least about 70:1, such as at least about 80:1 or at least about 100:1.
    Type: Grant
    Filed: March 23, 2005
    Date of Patent: April 24, 2007
    Assignee: Imerys Pigments, Inc.
    Inventors: J. Philip E. Jones, Robert J. Pruett, Jun Yuan, Michael J. Garska, David O. Cummings, Bomi M. Bilimoria, Robin Wesley