Calcium Containing, E.g., Calcite, Dolomite, Chalk, Whiting, Etc. Patents (Class 106/464)
  • Patent number: 10407601
    Abstract: Ooids, microabrasive compositions containing ooids and methods of making microabrasive compositions containing ooids are described. Generally, ooids represent small particles, which are selectable for size, size distribution, and other characteristics and can be used as a microabrasive particle. Ooids generally show a high level of symmetry, sphericity, roundness and a low aspect ratio. As described here, these characteristics generally yield a predictable and highly effective abrasive.
    Type: Grant
    Filed: February 26, 2018
    Date of Patent: September 10, 2019
    Assignee: California Institute of Technology
    Inventors: Elizabeth J. Trower, Usha F. Lingappa, John P. Grotzinger, Woodward Fischer
  • Patent number: 10351474
    Abstract: Process for preparing a mineral composition based on a mixed solid phase of calcium and magnesium carbonates, comprising a preparation, in an aqueous phase, of a suspension of a solid phase containing at least one calcium compound selected from calcium hydroxide, calcium carbonate and mixtures thereof and at least one magnesium compound selected from magnesium oxide, magnesium hydroxide, at least partially hydrated dolomite, and mixtures thereof, the weight of said solid phase being between 5% and 15% of the total weight of the suspension, a carbonation of said solid phase in suspension by injecting a gas containing CO2 into said suspension that is heated at a temperature of 55° C. to 90° C., at a flow rate of CO2 of 2.
    Type: Grant
    Filed: September 15, 2014
    Date of Patent: July 16, 2019
    Assignee: S.A. Lhoist Recherche et Developpement
    Inventors: Marion Lorgouilloux, Marc Pelletier, Robert Sebastian Gartner, Thierry Chopin
  • Patent number: 10351775
    Abstract: A mineral composition made from a mixed solid phase of calcium and magnesium carbonates, method of preparing same and use thereof. A mineral composition made from a mixed solid phase of calcium and magnesium carbonates, formed from a crystallized calcium portion and a crystallized magnesium portion in the form of platelets, the crystals of the calcium portion and those of the magnesium portion being aggregated in the form of composite aggregates, said aggregates themselves being at least partially agglomerated, said calcium portion comprising at least one carbonate chosen from the group consisting of calcite, aragonite and the mixtures thereof, said magnesium portion comprising hydromagnesite in platelet form, said mixed solid phase having a bulk density less than or equal to 250 kg/m3, and greater than or equal to 80 kg/m3, measured according to standard EN 459.2.
    Type: Grant
    Filed: March 22, 2013
    Date of Patent: July 16, 2019
    Assignee: S.A. Lhoist Recherche et Developpement
    Inventors: Marion Lorgouilloux, Robert Sebastian Gartner, Marc Pelletier, Thierry Chopin
  • Patent number: 10294371
    Abstract: The present invention relates to a process for the production of nano-fibrillar cellulose gels by providing cellulose fibers and at least one filler and/or pigment; combining the cellulose fibers and the at least one filler and/or pigment; and fibrillating the cellulose fibers in the presence of the at least one filler and/or pigment until a gel is formed, as well as the nano-fibrillar cellulose gel obtained by this process and uses thereof.
    Type: Grant
    Filed: September 2, 2014
    Date of Patent: May 21, 2019
    Assignee: FiberLean Technologies Limited
    Inventors: Patrick A. C. Gane, Joachim Schoelkopf, Daniel Gantenbein, Michel Schenker
  • Patent number: 10294115
    Abstract: The present invention is directed to a process for producing an aqueous suspension of precipitated calcium carbonate, wherein a milk of lime is prepared by mixing water, a calcium oxide containing material, and a precipitation enhancer, and subsequently, the milk of lime is carbonated to form an aqueous suspension of precipitated calcium carbonate.
    Type: Grant
    Filed: October 20, 2015
    Date of Patent: May 21, 2019
    Assignee: Omya International AG
    Inventors: Daniel E. Gerard, Patrick A. C. Gane
  • Patent number: 10053581
    Abstract: The present invention relates to crumbles comprising at least one calcium carbonate-containing material, a process for the preparation of the crumbles, an article comprising the crumbles as well as an use of the crumbles in paper making, paper coating, food, plastic, preferably films, more preferably blown films or breathable films, fibres, polyvinyl chloride, plastisols, thermosetting polymers, more preferably thermosetting unsaturated polyesters or thermosetting unsaturated polyurethanes, agricultural, paint, coatings, adhesives, sealants, pharmaceuticals, agricultural, construction and/or cosmetic applications.
    Type: Grant
    Filed: May 21, 2015
    Date of Patent: August 21, 2018
    Assignee: Omya International AG
    Inventors: Tazio Fornera, Ola Lindstrøm, Alain Cremaschi, Wolfgang Höpfl, Rolf Endre Orten
  • Patent number: 10047247
    Abstract: The present invention relates to a composition comprising hedge-hog shaped particles, at least one binder, and at least one hydrophobizing agent and/or at least one hydrophilizing agent, a method for controlling the wettability of substrate surfaces using these compositions, as well as a material comprising these compositions.
    Type: Grant
    Filed: February 4, 2013
    Date of Patent: August 14, 2018
    Assignee: Omya International AG
    Inventors: Joachim Schoelkopf, Hans-Joachim Weitzel
  • Patent number: 9981855
    Abstract: The present invention provides a process for preparing a precipitated calcium carbonate product. The process comprises the steps of preparing slaking quick lime to obtain slaked lime; and subjecting the slaked lime, without agitation, without prior cooling in a heat exchanger, and in the absence of any additives, to carbonation with carbon dioxide gas to produce PCC. The newly prepared product develops better performance thanks to improved resistance during processing.
    Type: Grant
    Filed: October 2, 2015
    Date of Patent: May 29, 2018
    Assignee: Omya International AG
    Inventors: Joe Wenk, George Saunders, Marc Maurer, Mathieu Skrzypczak
  • Patent number: 9944535
    Abstract: The present invention relates to a process for the production of a precipitated divalent metal ion carbonate product from a divalent metal ion carbonate which was recovered from waste, the precipitated divalent metal ion carbonate product having an improved brightness, the process comprising the steps of: providing a low-purity divalent metal ion carbonate material, the divalent metal ion carbonate material being recovered from waste; calcining the divalent metal ion carbonate material in order to obtain a divalent metal ion oxide; slaking the divalent metal ion oxide in order to obtain an aqueous suspension of a divalent metal ion hydroxide; carbonating the aqueous suspension of the divalent metal ion hydroxide with a carbon dioxide containing compound in order to obtain fine precipitated divalent metal ion carbonate particles; post-treating the fine precipitated divalent metal ion carbonate particles to obtain fine discrete precipitated divalent metal ion carbonate particles; adding the fine discrete precip
    Type: Grant
    Filed: April 20, 2016
    Date of Patent: April 17, 2018
    Assignee: Omya International AG
    Inventors: Michael Pohl, Thomas Schmölzer
  • Patent number: 9926428
    Abstract: Provided is a calcium carbonate filler which gives films and the like excellent in moldability, dispersibility, gasmark (bubbles), hue, and further, excellent in optical properties such as reflectivity and light resistance when incorporated into a resin to prepare a resin composition.
    Type: Grant
    Filed: February 20, 2015
    Date of Patent: March 27, 2018
    Assignee: MARUO CALCIUM CO., LTD.
    Inventors: Kouhei Sako, Hidemitsu Kasahara
  • Patent number: 9835946
    Abstract: Disclosed are a composite white pigment and a photoresist material. The composite white pigment includes particles, each of the particles includes an inner core including a non-white pigment and an outer layer including a white pigment and coating the inner core. The photoresist material includes the following components: 5 to 15 parts by weight of a photosensitizing agent, 5 to 15 parts by weight of a dispersant, 50 to 80 parts by weight of a solvent, and 5 to 15 parts by weight of the composite white pigment.
    Type: Grant
    Filed: March 23, 2016
    Date of Patent: December 5, 2017
    Assignees: BOE Technology Group Co., Ltd., Hefei Xinsheng Optoelectronics Technology Co., Ltd.
    Inventors: Jun Li, Yang Liu, Lingyan Wu, Lei Zhang, Ming Hu
  • Patent number: 9725329
    Abstract: The present invention provides a process for preparing a precipitated calcium carbonate product. The process comprises the steps of preparing an aqueous suspension of precipitated calcium carbonate seeds by carbonating a suspension of Ca(OH)2 in the presence of 0.005 to 0.030 moles of Sr, in the form of Sr(OH)2, based upon moles of Ca(OH)2 prior to or during carbonation; forming an aqueous suspension of a precipitated calcium carbonate product by carbonating a slurry of Ca(OH)2 in the presence of 0.5 to 5% by dry weight of the precipitated calcium carbonate seeds, wherein the precipitated calcium carbonate seeds have a D50 that is less than the D50 of the precipitated calcium carbonate product and the precipitated calcium carbonate seeds have an aragonitic polymorph content greater than or equal to the precipitated calcium carbonate product.
    Type: Grant
    Filed: February 10, 2015
    Date of Patent: August 8, 2017
    Assignee: Omya International AG
    Inventors: Michael Pohl, Christian Rainer, Gernot Primosch
  • Patent number: 9670664
    Abstract: The manufacture of a thermal insulating product whereby a foam is produced from a mixture of mineral particles, the product is shaped, and the foam is dried. Specifically, the foam is produced from a crystallized calcic part and a crystallized magnesian part, and a composite aggregate of the crystals of the calcic and magnesian part is formed. The calcic part is chosen from calcite and/or aragonite, and the magnesian part is made of hydromagnesite.
    Type: Grant
    Filed: May 31, 2013
    Date of Patent: June 6, 2017
    Assignee: SAINT-GOBAIN ISOVER
    Inventors: Valerie Goletto, Tamar Saison
  • Patent number: 9644101
    Abstract: The present invention concerns the technical sector of mineral pigments containing a product formed in situ by the double and/or multiple reaction between a calcium carbonate and the reaction product or products of the said carbonate with one or more moderately strong to strong H3O+ ion donors and the reaction product or products of the said carbonate with gaseous CO2 formed in situ and/or coming from an external supply, and at least one aluminum silicate and/or at least one synthetic silica and/or at least one calcium silicate and/or at least one silicate of a monovalent salt such as sodium silicate and/or potassium silicate and/or lithium silicate, and/or at least one aluminum hydroxide and/or at least one sodium and/or potassium aluminate, containing less than 0.1% by weight silicate of a monovalent salt such as sodium, potassium or lithium silicate or mixtures thereof, relative to the dry weight of calcium carbonate, having a pH greater than 7.5 measured at 20° C.
    Type: Grant
    Filed: March 17, 2004
    Date of Patent: May 9, 2017
    Assignee: Omya International AG
    Inventors: Patrick Gane, Matthias Buri, Rene Vinzenz Blum
  • Patent number: 9567234
    Abstract: Dry precipitated calcium carbonate and a slurry of precipitated calcium carbonate (“PCC”) particles at least partially in the form elongated entities, especially of nanofibers or nanochain like agglomerates constituted by at least two interconnected primary particles, and preferably, with a content of scalenohedron particles, is provided having opacifying properties. The slurry may be produced on site of its use and, due to its high concentration of CaCO3, may be applied directly after its manufacture.
    Type: Grant
    Filed: March 17, 2014
    Date of Patent: February 14, 2017
    Assignee: Imerys SA
    Inventors: Jean-Luc Rico, Cédric Raboteau, Alexandra Jakob
  • Patent number: 9528003
    Abstract: The present invention relates to a composition for beta-nucleation of polypropylene, comprising: (a) a particulate mineral solid support, comprising a compound of a IUPAC Group 2 metal, and (b) on the surface of the particulate solid support (b1) a salt of a dicarboxylic acid, wherein the dicarboxylic acid has from 7 to 10 carbon atoms, and (b2) a dispersing and/or grinding agent.
    Type: Grant
    Filed: November 9, 2010
    Date of Patent: December 27, 2016
    Assignee: Omya International AG
    Inventors: Michael Knerr, Matthias Buri, Patrick A. C. Gane
  • Patent number: 9493361
    Abstract: Skeleton nanoparticles and method of forming the same. The skeleton nanoparticles comprise silica shells. Each of the silica shells has a shape of a cubic frame formed of six faces as a whole. The cubic frame is hollow inside and pores are formed between quadrilateral silica frames on respective faces of the cubic frame. The method comprising: coating an organic acid on surfaces of calcium carbonate particles; dispersing the organic acid-coated calcium carbonate particles in an organic solvent that dissolves a part of the organic acid in the organic acid-coated calcium carbonate particles, and further mixing a silicon alkoxide and a base catalyst to form silica-forming particles by forming the silica shell along an edge of the calcium carbonate particles; and dissolving the calcium carbonate at an inside of the silica-forming particles by an acid treatment.
    Type: Grant
    Filed: March 2, 2012
    Date of Patent: November 15, 2016
    Assignees: NAGOYA INSTITUTE OF TECHNOLOGY, GRANDEX Co., Ltd.
    Inventors: Masayoshi Fuji, Kyoichi Fujimoto, Chika Takai
  • Patent number: 9487916
    Abstract: The invention provides a method of improving dewatering efficiency, increasing sheet wet web strength, increasing sheet wet strength and enhancing filler retention in a papermaking process The method improves the efficiency of drainage aids or wet web strength aids or wet strength aid by coating at least some of the filler particles with a material that prevents the filler materials form adhering to a those additives. The drainage additive or wet web strength additive or wet strength aid holds the cellulose fibers together tightly and is not wasted on the filler particles.
    Type: Grant
    Filed: June 17, 2013
    Date of Patent: November 8, 2016
    Assignee: NALCO Company
    Inventors: Yulin Zhao, Jun Li, Qing Long Rao, Stephen Ashton, Weiguo Cheng, Aleksandar Todorovic, Alan Smith
  • Patent number: 9267050
    Abstract: The present invention relates to a composition comprising microfibrillated cellulose, mono-, di- or oligo-saccharides and a pigment in order to achieve a composition with improved rheological properties such as a low viscosity even at high dry content. The present invention further relates to process for the production of said composition.
    Type: Grant
    Filed: May 11, 2011
    Date of Patent: February 23, 2016
    Assignee: Stora Enso OYJ
    Inventors: Isto Heiskanen, Kaj Backfolk
  • Patent number: 9220665
    Abstract: The invention provides an oral care composition comprising: (a) a continuous phase comprising water or polyhydric alcohol or a mixture thereof; and (b) a particulate calcium carbonate abrasive composed of primary particles which are acicular and which have a length of 2 microns or greater; in which the level of the particulate calcium carbonate abrasive ranges from 10 to 70%, preferably from 20 to 60%, more preferably from 30 to 40%, by total weight of the particulate calcium carbonate abrasive based on the total weight of the composition. The composition of the invention demonstrates satisfactory levels of cleaning, yet is not unduly abrasive and damaging to the teeth.
    Type: Grant
    Filed: September 12, 2012
    Date of Patent: December 29, 2015
    Assignee: Conopco, Inc.
    Inventors: Alexander Thomas Ashcroft, Jian Cao, Shouwei Ma, Edward George Pelan, Simeon Dobrev Stoyanov, Weizheng Zhou
  • Patent number: 9102822
    Abstract: Disclosed is a roll member including a core, and an elastic layer arranged on the core, the elastic layer containing a rubber material and polyalphaolefin.
    Type: Grant
    Filed: September 14, 2011
    Date of Patent: August 11, 2015
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Shogo Tomari, Minoru Rokutan
  • Patent number: 9074067
    Abstract: A process is provided for making a calcium carbonate slurry comprising the steps of (a) forming a mixture comprising water, an acidic dispersant system, and calcium carbonate, (b) grinding said mixture to form a preliminary slurry of particles of said calcium carbonate, wherein 50% or more by weight of said calcium carbonate in said preliminary slurry, based on the total weight of said calcium carbonate in said preliminary slurry, is in the form of particles having diameter of 2 micrometers or less, and wherein the pH of said preliminary slurry is 9.0 or below, and (c) after step (b), adding one or more organic neutralizing agent to bring the pH of said preliminary slurry to 9.4 or above.
    Type: Grant
    Filed: December 10, 2012
    Date of Patent: July 7, 2015
    Assignee: Rohm and Haas Company
    Inventor: Alain Dufour
  • Patent number: 9045649
    Abstract: The present invention is related to the industry of coatings and more specifically to the industry that manufactures bases for paints and even more specifically, to the industry that manufactures inorganic material bases. Our invention has, with respect to the current state of the art, the following advantages: coating characteristics, improved coloring and whiteness capacity which allow for adequate handling of the same even with a large concentration of solids, made of less costly materials. Said composition is characterized by consisting in its composition of kaolin with the following distribution of particle size: between 88 and 98% of the particles should be smaller than 2 microns and only between 10 and 30% should be smaller than 0.2 microns; and of calcium carbonate with a distribution of particle size of between 88 and 96% of the particles smaller than 2 microns and between 4 and 14% smaller than 0.2 microns.
    Type: Grant
    Filed: November 24, 2011
    Date of Patent: June 2, 2015
    Assignee: ATSA COMERCIAL S.A.DE.C.V.
    Inventor: Jorge Gerardo Garcia Teruel Y Herroz
  • Patent number: 9011593
    Abstract: The present invention is directed to a process for the preparation of an aqueous suspension of self-binding pigmentary particles comprising the following stages: (a) forming one or more aqueous suspensions of at least one inorganic matter comprising calcium carbonate; (b) forming or obtaining one or more aqueous solutions or suspensions or emulsions of at least one binder; and (c) co-grinding the aqueous suspension or suspensions obtained in stage a) with the aqueous solutions or suspensions or emulsions obtained in stage b) in a mill so as to obtain an aqueous suspension of self-binding pigmentary particles.
    Type: Grant
    Filed: July 12, 2005
    Date of Patent: April 21, 2015
    Assignee: Omya International AG
    Inventors: Patrick Gane, Joachim Schoelkopf
  • Patent number: 8986440
    Abstract: The invention relates to novel and innovative PCC pigments, able to be used in a paper coating formulations to manufacture coated “multipurpose” papers, in particular for inkjet applications, whose print qualities would be identical or quite similar to high resolution commercial papers, while maintaining a reduced paper manufacturing and production cost. Said pigments are obtained by a carbonation process using a reduced flow rate of CO2/air, which leads to porous agglomerates of PCC of a very specific structure and unique properties, followed by an upconcentration step leading to substantially the same agglomerates but with a higher, appropriate, solids content.
    Type: Grant
    Filed: October 21, 2011
    Date of Patent: March 24, 2015
    Assignee: Omya International AG
    Inventors: Michael Kaessberger, Michael Pohl
  • Patent number: 8987363
    Abstract: Calcium carbonate particles having very narrow particle sizes with a controlled D98 and minimal ultrafines (very small particles) are described. The particles are prepared by grinding a feedstock in a centrifugal grinding mill, which utilizes very high centrifugal forces to impact the particles with each other or grinding media.
    Type: Grant
    Filed: March 20, 2012
    Date of Patent: March 24, 2015
    Assignee: J.M. Huber Corporation
    Inventors: Lane George Shaw, Gary Lee Hillebrenner
  • Publication number: 20140366777
    Abstract: The present invention relates to a process for the production of precipitated calcium carbonate, comprising the following steps: a) providing a reaction vessel containing an aqueous phase at an initial temperature; b) injecting a carbon dioxide generating compound into the aqueous phase until the pH of the aqueous phase is in the range of around 5 to around 7; and c) subsequently adding a calcium hydroxide slurry at an initial temperature to the reaction vessel while continuing the injection of the carbon dioxide generating compound, in order to obtain an aqueous slurry of the precipitated calcium carbonate. The addition rate of the calcium hydroxide slurry to the reaction vessel in step c) is such that an average electrical conductivity of the reaction contents in the reaction vessel during the reaction is in a range of 100 to 6 000 ?S/cm.
    Type: Application
    Filed: June 19, 2012
    Publication date: December 18, 2014
    Inventors: Mathieu Skrzypczak, Marc Maurer, Thomas Schmölzer
  • Patent number: 8889068
    Abstract: The invention concerns a process for disinfection and/or conservation and/or reduction and/or control of microbial contamination of aqueous dispersions and/or aqueous suspensions of mineral matter, providing satisfactory stability in terms of Brookfield™ viscosity for the said aqueous dispersions and/or suspensions of mineral matter. It also concerns the said aqueous dispersions and/or suspensions thus obtained, together with their uses in the mineral, paper and paint industries. Finally it concerns the end products obtained.
    Type: Grant
    Filed: January 20, 2006
    Date of Patent: November 18, 2014
    Assignee: Omya International AG
    Inventors: Matthias Buri, Patrick Schwarzentruber, Silvia Hub-Schmid
  • Publication number: 20140326167
    Abstract: The present invention relates to a method of preparing calcium carbonate coated calcium hydroxide particles by combining calcium hydroxide and dry ice in an acquiescent manner. The invention further relates to an apparatus for carrying out the method and to the use of the calcium carbonate coated calcium hydroxide particles of the method as filler for use with thermoplastics polymers.
    Type: Application
    Filed: October 12, 2012
    Publication date: November 6, 2014
    Inventors: Marcus E. Martin, Edward K. Pardiak
  • Patent number: 8877127
    Abstract: The invention concerns a process for disinfection and/or conservation and/or reduction and/or control of microbial contamination of aqueous dispersions and/or aqueous suspensions of mineral matter, providing satisfactory stability in terms of Brookfield™ viscosity for the said aqueous dispersions and/or suspensions of mineral matter. It also concerns the said aqueous dispersions and/or suspensions thus obtained, together with their uses in the mineral, paper and paint industries. Finally it concerns the end products obtained.
    Type: Grant
    Filed: August 28, 2013
    Date of Patent: November 4, 2014
    Assignee: Omya International AG
    Inventors: Matthias Buri, Patrick Schwarzentruber, Silvia Hub-Schmid
  • Publication number: 20140319412
    Abstract: The present invention relates to an economic process for preparing surface-reacted calcium carbonate. The present invention further relates to a surface-reacted calcium carbonate having an increased specific BET surface area, and the use of a process for adjusting the specific BET surface area.
    Type: Application
    Filed: June 26, 2014
    Publication date: October 30, 2014
    Applicant: Omya International AG
    Inventors: Patrick A.C. Gane, Daniel E. Gerard, Joachim Schölkopf
  • Patent number: 8869477
    Abstract: Formed building materials comprising a sequestered CO2 are provided. The building materials of the invention include a composition comprising a carbonate/bicarbonate component. Additional aspects of the invention include methods of making and using the formed building materials.
    Type: Grant
    Filed: October 31, 2011
    Date of Patent: October 28, 2014
    Assignee: Calera Corporation
    Inventors: Eric Ha, Guillaume Calas, Peng Lu, Chris Camire, William Bourcier, Treavor Kendall, Irvin Chen, Martin Devenney
  • Patent number: 8821628
    Abstract: The present invention relates to a process for preparing an aqueous suspension of dispersed calcium carbonate, wherein the resulting coating of said suspension provides opaque properties or has a specific light scattering coefficient S. The invention further relates to compositions of such suspensions of dispersed calcium carbonate and to its use in the field of paper coatings and paper mass fillings as well as paints and plastic coatings.
    Type: Grant
    Filed: June 29, 2010
    Date of Patent: September 2, 2014
    Assignee: Omya International AG
    Inventors: Patrick A. C. Gane, Matthias Buri, Samuel Rentsch
  • Patent number: 8809582
    Abstract: The present invention relates to an economic process for preparing surface-reacted calcium carbonate. The present invention further relates to a surface-reacted calcium carbonate having an increased specific BET surface area, and the use of a process for adjusting the specific BET surface area.
    Type: Grant
    Filed: August 8, 2013
    Date of Patent: August 19, 2014
    Assignee: Omya International AG
    Inventors: Patrick A.C. Gane, Daniel E. Gerard, Joachim Schölkopf
  • Patent number: 8785687
    Abstract: The present invention relates to an economic process for preparing surface-reacted calcium carbonate. The present invention further relates to a surface-reacted calcium carbonate having an increased specific BET surface area, and the use of a process for adjusting the specific BET surface area.
    Type: Grant
    Filed: June 15, 2010
    Date of Patent: July 22, 2014
    Assignee: Omya International AG
    Inventors: Patrick A. C. Gane, Daniel E. Gerard, Joachim Schölkopf
  • Patent number: 8772356
    Abstract: A method for treating an inorganic slurry to preserve the slurry against bacterial contamination, including (I) providing a slurry in a substantially homogeneous phase, and then (II) adding to the slurry an effective amount of a composition containing: (a) a tetrakis(hydroxyorgano)phosphonium salt selected from the group consisting of tetrakis(hydroxymethyl)phosphonium sulphate, tetrakis(hydroxymethyl)phosphonium chloride, tetrakis(hydroxymethyl)phosphonium phosphate, tetrakis(hydroxymethyl)phosphonium nitrate and tetrakis(hydroxymethyl)phosphonium oxalate; and (b) a dispersant selected from the group consisting of (i) a phosphonated compound containing at least one tertiary nitrogen atom and (ii) a homopolymer of an unsaturated acid; and (III) preserving the slurry against bacterial contamination, while avoiding instantaneous heterogeneous thickening of the slurry due to the tetrakis(hydroxyorgano)phosphonium salt.
    Type: Grant
    Filed: April 3, 2013
    Date of Patent: July 8, 2014
    Assignee: Rhodia Operations
    Inventor: Christopher Raymond Jones
  • Publication number: 20140179852
    Abstract: Coating composition providing gloss and opacity on application, having a pigment volume concentration of from 5% up to the critical pigment volume concentration and characterised in that comprises at least one ground natural calcium carbonate having a volume median diameter of between 0.05 and 0.3 ?m, and at least one pigment having a refractive index of greater than or equal to 2.5.
    Type: Application
    Filed: February 27, 2014
    Publication date: June 26, 2014
    Inventors: Patrick A.C. Gane, Detlet Gysau, George Saunders, Joseph McJunkins
  • Patent number: 8758500
    Abstract: The present invention provides a process for the preparation of a silicate and carbonate co-substituted calcium phosphate material. The process comprises the steps of: forming a silicon and optionally carbon-containing calcium phosphate precipitate by an aqueous precipitation method involving preparing an aqueous solution comprising phosphate ions, silicate ions, calcium ions and optionally carbonate ions, wherein the ratio of Ca/P and of Ca/(P+Si) in the solution is maintained above approximately 1.67; and heating the precipitate in an atmosphere comprising carbon and oxygen to form a silicate and carbonate co-substituted calcium phosphate material. The present invention also provides a synthetic carbonate and silicate co-substituted hydroxyapatite material, as well as a biomedical material.
    Type: Grant
    Filed: April 11, 2008
    Date of Patent: June 24, 2014
    Assignees: University Court of the University of Aberdeen, Apatech Limited
    Inventors: Iain R. Gibson, Janet M. S. Skakle, Daniel J. Hadden, Thomas Buckland
  • Patent number: 8747543
    Abstract: A method of blending a fine precipitated calcium carbonate (PCC) filler with larger PCC, the resulting blend to be used alone or in conjunction with a ground carbonate, clay or other filler, resulting in improved porosity by the lowering of the porosity of supercalendered paper, thereby imparting improved and offset printability. The fine PCC can be ultrafine PCC filler which then is blended with other fillers including but not limited to pigments. These fillers which are blended with the fine PCC include commercial and experimental PCC and commercial clays. Ultrafine PCC has agglomerates of small, discrete particles. Ultrafine PCC for use in the invention has a specific surface area of about 20 m2/g as measured by BET gas adsorption. As measured by a sedigraph, the average size of these agglomerates is from 0.4 to 1.1 microns.
    Type: Grant
    Filed: April 5, 2012
    Date of Patent: June 10, 2014
    Assignee: Specialty Minerals (Michigan) Inc.
    Inventors: David Lee Smith, Gerald D. Erdman, Harry J. Huhn, III, Marko Pohjolainen, Joseph A. Sohara
  • Patent number: 8673117
    Abstract: A degrading agent composition for use in manufacturing a tissue product generally includes a degrading agent, a degradation inhibiting carrier, and a non-ionic surfactant. The non-ionic surfactant stabilizes the viscosity of the composition as a function of time. The degrading agent composition can be used in combination with a temporary wet strength agent to produce a tissue product exhibiting high initial wet tensile strength and desirable decay properties. Processes for forming the tissue product and pumpable fluids containing the degrading agent composition are also disclosed.
    Type: Grant
    Filed: September 30, 2010
    Date of Patent: March 18, 2014
    Assignee: Kemira Oyj
    Inventors: Scott Rosencrance, Yuping Luo, Vladimir Grigoriev
  • Publication number: 20140069302
    Abstract: The present invention relates to a filler or a filler mixture containing carbonate, as well as to a process for manufacturing the same by precipitating the filler directly into the pulp or, as a separate process without the presence of fibres, particularly from the wire water of the paper or board manufacture. The invention also relates to a fibre product containing this filler, such as a paper or board product, or a plastic, rubber, concrete or paint product.
    Type: Application
    Filed: December 21, 2012
    Publication date: March 13, 2014
    Applicant: NORDKALK OY AB
    Inventors: Sakari Saastamoinen, Teemu Grönblom, Lars Grönroos
  • Publication number: 20140041550
    Abstract: An object of the present invention is to provide a process to grind at least one mineral material in the presence of ceria (CeO2)-containing zirconium oxide grinding beads having a specific ceria content (of between 14 and 20% by weight relative to the total weight of said bead, preferably of between 15 and 18%, and most preferably of approximately 16%), and a specific average grain size (of less than 1 ?m, preferably of less than 0.5 ?m, and most preferably of less than 0.3 ?m), wherein such beads are more resistant to wear than conventional beads of the prior art. Another object of the present invention lies in the ground material in the form of an aqueous suspension and in the form of a dry product. Another object of the present invention lies in the uses of such products in any sector making use of mineral materials, and notably in the paper, paint and plastic industries.
    Type: Application
    Filed: October 23, 2013
    Publication date: February 13, 2014
    Inventors: Christian Rainer, Michael Pohl
  • Publication number: 20140033954
    Abstract: An activator composition, in particular suitable for activating latent hydraulic and/or pozzolanic materials in binder compositions, includes: a first component A, including an alkali metal salt and/or an earth alkali metal salt; a second component B, including a metal sulfate; optionally, a third component C, suitable for accelerating the hardening of a hydraulic binder material; and optionally, a filler material; with at least the components A, B and C, if present, being chemically different.
    Type: Application
    Filed: March 22, 2012
    Publication date: February 6, 2014
    Applicant: SIKA TECHNOLOGY AG
    Inventors: Robert Flatt, Christophe Guyot, Pascal Bailleul
  • Publication number: 20140024721
    Abstract: The present invention refers to a process for preserving an aqueous preparation of mineral material like e.g. calcium carbonate preparations, and to the use of a composition as a preservative in an aqueous preparation of mineral materials.
    Type: Application
    Filed: September 25, 2013
    Publication date: January 23, 2014
    Inventors: Nicola Di Maiuta, Patrick Schwarzentruber
  • Publication number: 20140000486
    Abstract: The invention concerns a process for disinfection and/or conservation and/or reduction and/or control of microbial contamination of aqueous dispersions and/or aqueous suspensions of mineral matter, providing satisfactory stability in terms of Brookfield™ viscosity for the said aqueous dispersions and/or suspensions of mineral matter. It also concerns the said aqueous dispersions and/or suspensions thus obtained, together with their uses in the mineral, paper and paint industries. Finally it concerns the end products obtained.
    Type: Application
    Filed: August 28, 2013
    Publication date: January 2, 2014
    Inventors: Matthias Buri, Patrick Schwarzentruber, Silvia Hub-Schmid
  • Publication number: 20140000485
    Abstract: A method of blending a fine precipitated calcium carbonate (PCC) filler with larger PCC, the resulting blend to be used alone or in conjunction with a ground carbonate, clay or other filler, resulting in improved porosity by the lowering of the porosity of supercalendered paper, thereby imparting improved and offset printability. The fine PCC can be ultrafine PCC filler which then is blended with other fillers including but not limited to pigments. These fillers which are blended with the fine PCC include commercial and experimental PCC and commercial clays. Ultrafine PCC has agglomerates of small, discrete particles. Ultrafine PCC for use in the invention has a specific surface area of about 20 m2/g as measured by BET gas adsorption. As measured by a sedigraph, the average size of these agglomerates is from 0.4 to 1.1 microns.
    Type: Application
    Filed: April 5, 2012
    Publication date: January 2, 2014
    Applicant: Specialty Minerals (Michigan) Inc.
    Inventors: David Lee Smith, Gerald D. Erdman, Harry J. Huhn, III, Marko Pohjolainen, Joseph A. Sohara
  • Patent number: 8618204
    Abstract: A two-part epoxy-based structural adhesive composition comprising a curable epoxy resin, an amine curing agent, a toughening agent, and an oil-displacing agent. The structural adhesive may optionally include reactive liquid modifiers, fillers, secondary curatives, reactive diluents, surfactants, metal salts, pigments and combinations thereof. The structural adhesive may be used to form bonded joints between adherends having clean surfaces, as well as those having surfaces contaminated with hydrocarbon-containing materials, such as oils, processing aids and lubricating agents.
    Type: Grant
    Filed: July 22, 2009
    Date of Patent: December 31, 2013
    Assignee: 3M Innovative Properties Company
    Inventors: Christopher J. Campbell, Alphonsus V. Pocius, Liya Gorodisher
  • Patent number: 8608905
    Abstract: This invention concerns the production of a multilayer fiber product. According to the method, on top of a bottom layer consisting of at least one fiber layer, a second fiber layer is fitted containing filler that forms the surface layer. According to the invention, the layers are formed by multilayer web forming technology, and the surface layer filler includes cellulose or lignocellulose fibrils, on which light-scattering material particles are deposited, having a maximum proportion of the total filler weight of 85%. By means of the invention, a base paper is achieved that is suited to thin, coated paper grades, where conventionally the intrusion of the coating color into the bottom paper and through it is a problem.
    Type: Grant
    Filed: August 2, 2010
    Date of Patent: December 17, 2013
    Inventors: Markku Leskela, Jari Meuronen, Petri Silenius, Sami Haapala
  • Patent number: 8603424
    Abstract: CO2-sequestering formed building materials are provided. The building materials of the invention include a composition comprising a carbonate/bicarbonate component. Additional aspects of the invention include methods of making and using the CO2-sequestering formed building material.
    Type: Grant
    Filed: October 11, 2012
    Date of Patent: December 10, 2013
    Assignee: Calera Corporation
    Inventors: Brent R Constantz, Andrew Youngs, Terence C Holland
  • Patent number: 8598064
    Abstract: New photocatalytic product comprising compounds of titanium integrated with limestone. The product is obtained by reacting limestone with a suitable precursor of titanium dioxide in a basic solution, recovering the product in particular conditions, drying it and calcining it. By operating in presence of sodium, a composite is obtained substantially free from titanium dioxide, containing limestone and calcium titanate. The composite thus obtained, used as such or in mixture with other components, has shown an unexpectedly high photocatalytic activity.
    Type: Grant
    Filed: July 31, 2009
    Date of Patent: December 3, 2013
    Assignee: Italcementi S.p.A.
    Inventors: Renato Ancora, Massimo Borsa, Maurizio Iler Marchi