Silicon Containing Additive Other Than Clay Patents (Class 162/181.6)
  • Patent number: 10591063
    Abstract: Provided is a spiral wound gasket that has improved conformability and that is capable of exhibiting sufficient sealability for flanges provided at joints, irrespective of the state of a gap between the flanges. The present invention provides a spiral wound gasket in which a laminate of a hoop member made of metal and a filler member is wound and integrated so as to have an opening at the center, wherein the hoop member has a cross-sectional shape with a bent portion, and V expressed by an equation (I) below is 0.5 to 2.4: V = 1 r ? cos ? ( ? 2 ) , ( I ) where a bending angle constituting the bent portion is ? (°), and a radius of curvature of the bent portion is r (mm).
    Type: Grant
    Filed: June 29, 2018
    Date of Patent: March 17, 2020
    Assignee: NIPPON PILLAR PACKING CO., LTD.
    Inventors: Yuji Yanagitake, Naoyuki Sawamoto, Hiroki Tanabe, Yuta Sato, Kiyoshi Toyazaki
  • Patent number: 10077363
    Abstract: A nano-composite structure. A synthetic nano-composite is described having a first component including a fibrous structured amorphous silica structure, and a second component including a precipitated calcium carbonate structure developed by pressure carbonation. The nano-composite may be useful for fillers in paints and coatings. Also, the nano-composite may be useful in coatings used in the manufacture of paper products.
    Type: Grant
    Filed: March 27, 2017
    Date of Patent: September 18, 2018
    Assignee: PACIFIC NANO PRODUCTS, INC.
    Inventor: Vijay K Mathur
  • Patent number: 9908982
    Abstract: The present application relates to a natural fiber plastic composite product comprising thermoplastic polymer and dried deinking sludge containing cellulose fibers and minerals in foamed form. The present application also relates to a method for preparing the natural fiber plastic composite product.
    Type: Grant
    Filed: May 18, 2015
    Date of Patent: March 6, 2018
    Assignee: UPM-KYMMENE CORPORATION
    Inventor: Piia Peltola
  • Patent number: 9487917
    Abstract: The invention relates to a sol containing silica-based particles having an axial ratio of at least about 10 and specific surface area of at least about 600 m2/g. The invention further relates to a sol containing silica-based particles having an axial ratio of at least about 10 and S-value up to about 25. The invention further relates to a sol containing silica-based particles having an axial ratio of at least about 10 and a specific surface area of at least about 400 m2/g, wherein the silica-based particles are surface-modified. The invention further relates to a sol containing silica-based particles having a viscosity of at least 50 cP and silica content of at least about 3% by weight, wherein the silica-based particles have a specific surface area of at least about 400 m2/g.
    Type: Grant
    Filed: September 24, 2014
    Date of Patent: November 8, 2016
    Assignee: AKZO NOBEL N.V.
    Inventors: Michael Persson, Freddie Hansson, Annika Viola Pal, Lars Lindahl, Joakim Carlén
  • Patent number: 9067247
    Abstract: A process for treating a tailings stream comprises (a) contacting a deionized silicate solution with a tailings stream whereby the solids are entrapped within a gel produced from the silicate solution; and (b) allowing the gel to strengthen and solidify. The process may further comprise spreading the gel produced in step (a) over a surface. The present invention is particularly useful to treat tailings streams produced in processes to extract bitumen from oil sands ores.
    Type: Grant
    Filed: March 21, 2013
    Date of Patent: June 30, 2015
    Assignee: THE CHEMOURS COMPANY FC, LLC
    Inventors: Robert Harvey Moffett, Sigridur Soley Kristjansdottir
  • Patent number: 9051687
    Abstract: The present invention relates to a process for production of paper, card and board comprising draining a filler-containing paper stock comprising at least one water-soluble polymer with sheet formation in the wire section and then pressing the paper in the press section, wherein a paper stock having a fibrous concentration in the range from 20 to 40 g/l has the at least one water-soluble polymer added to it, then the paper stock is diluted to a fibrous concentration in the range from 5 to 15 g/l, the diluted paper stock is drained to form a sheet and the sheet is pressed in the press section to a solids content G(x) wt % or greater and G(x) computes according to G(x)=48+(x?15)·0.
    Type: Grant
    Filed: August 19, 2013
    Date of Patent: June 9, 2015
    Assignee: BASF SE
    Inventors: Anton Esser, Hans-Joachim Haehnle
  • Patent number: 8999112
    Abstract: A method for manufacturing a sheet of paper and/or board having improved retention and drainage properties is provided, according to which, before the formation of the sheet and/or board, at least two retention aids are added to the fibrous suspension. These two retention aids are a main retention aid corresponding to a (co)polymer having a cationic charge density above 2 meq/g, obtained by the Hofmann degradation reaction, and a secondary retention aid corresponding to a water-soluble or water-swellable polymer having an anionic charge density above 0.1 meq/g. The main retention aid is introduced into the fibrous suspension in a proportion of 100 to 800 g/t of dry pulp, and the secondary retention aid is introduced into the fibrous suspension in a proportion of 50 to 800 g/t of dry pulp and has an intrinsic viscosity IV above 3 dl/g.
    Type: Grant
    Filed: January 30, 2013
    Date of Patent: April 7, 2015
    Assignee: S.P.C.M. SA
    Inventors: Gatien Faucher, Rene Hund
  • Patent number: 8974637
    Abstract: The present invention relates to a process for the production of paper and board which comprises: (a) introducing one or more fillers, one or more anionic polysaccharides and one or more cationic agents into a mixing zone to form a filler composition; (b) introducing by means of a pump the filler composition into an aqueous suspension comprising cellulosic fibers; and (c) dewatering the obtained suspension. The present invention also relates to a process for the production of a filler composition which comprises: (a) introducing one or more fillers, one or more anionic polysaccharides and one or more cationic agents into a mixing zone to form a filler composition; (b) introducing by means of a pump the filler composition into a storage tank.
    Type: Grant
    Filed: June 5, 2012
    Date of Patent: March 10, 2015
    Assignee: Akzo Nobel Chemicals International B.V.
    Inventor: Patrik Simonson
  • Patent number: 8932433
    Abstract: A method of improving retention and drainage in a papermaking process is disclosed. The addition of an associative polymer, a poly(vinylamine) and optionally a siliceous material to the papermaking slurry to improve retention and drainage is disclosed. Additionally a method to improve retention and drainage comprising addition of an organic microparticle, a poly(vinylamine) and optionally a siliceous material to the papermaking slurry is disclosed. A composition comprising an associative polymer, and a poly(vinylamine) and optionally further comprising cellulose fiber is disclosed.
    Type: Grant
    Filed: July 17, 2012
    Date of Patent: January 13, 2015
    Assignee: Solenis Technologies, L.P.
    Inventors: Frank J. Sutman, John C. Harrington, Robert A Gelman
  • Patent number: 8888956
    Abstract: The disclosure provides a paper slurry comprising a treated inorganic pigment, wherein the treated inorganic pigment comprises an inorganic pigment comprising a pigment surface area of about 30 to about 75 m2/g; wherein the pigment surface is treated with an organic treating agent comprising a polyalkanol alkane or a polyalkanol amine, present in the amount of at least about 1.5%, and wherein the treated inorganic pigment has a RHI (rat hole index) of about 7 to about 11.
    Type: Grant
    Filed: April 24, 2012
    Date of Patent: November 18, 2014
    Assignee: E I du Pont de Nemours and Company
    Inventors: Daniel C Kraiter, Michael Patrick Diebold, Timothy Allan Bell
  • Patent number: 8888957
    Abstract: The present invention relates to a process for producing paper which comprises: providing an aqueous suspension comprising cellulosic fibers, adding to the suspension, after all points of high shear, a cationic polysaccharide; an inorganic polymer P1 being a cationic polyaluminium compound; and a polymer P2 being an anionic polymer; and, dewatering the obtained suspension to form paper.
    Type: Grant
    Filed: September 6, 2012
    Date of Patent: November 18, 2014
    Assignee: Akzo Nobel N.V.
    Inventors: Fredrik Solhage, Joakim Carlén, Birgitta Johansson
  • Patent number: 8871058
    Abstract: A process in which an at least partially delignified pulp fiber web having a Kappa number of less than about 130 is treated with an aqueous endothermic fire retardant solution having a pH of about 10 or less. The treated pulp fiber web has a near neutral pH of from about 5 to about 9, and is treated with at least about 20 lbs of endothermic fire retardants per ton of the pulp fiber web, with at least about 5% of the total amount of endothermic fire retardants being added at a point prior to when the pulp fiber web is formed. Also a fire resistant pulp fiber web having a near neutral pH.
    Type: Grant
    Filed: May 31, 2013
    Date of Patent: October 28, 2014
    Assignee: International Paper Company
    Inventors: James E. Sealey, Brent A. Fields
  • Patent number: 8840761
    Abstract: The present invention relates to a process for controlling deposits in a paper making process, more particularly to a process comprising the use of talc for controlling deposits in a paper making process with talc. One aspect of the invention is contacting talc with a white water stream at one or more locations within the paper making process after separating pulp from a pulp-containing stream and before introducing the re-circulating the white water stream to one or more of a pulper, a thick-stock, a thin-stock, a dilution process, a shower, a storage vessel, a blending process, and a digestor.
    Type: Grant
    Filed: June 8, 2011
    Date of Patent: September 23, 2014
    Assignee: Imerys Talc America, Inc.
    Inventor: Daniel Mark Woiceshyn
  • Publication number: 20140251565
    Abstract: The invention provides a method for improving the effectiveness of colloidal silica. The method involves removing enough charged impurities from the colloid to prevent the charged particles from causing the colloid to become a viscous gel. The method however also involves not removing too many charged particles so the silica material doesn't gel by cross-linking with itself. This method is quite effective because it recognizes that materials that have accumulated during the formation of the colloid do perform an important function, but they can perform better at a lower concentration.
    Type: Application
    Filed: March 8, 2013
    Publication date: September 11, 2014
    Inventors: Jane B. Wong Shing, Zhi Chen, Dennis MacDonald, Ronald S. Doles, Wen Bai
  • Publication number: 20140241565
    Abstract: After beaten, pulp is mixed with a filler to obtain a mixture of the pulp and the filler. Additives are added to the mixture, which is made into pater and then hot-pressed. The filler content of the mixture is in the range of 20 wt % to 80 wt %. After the additives are added, a polymeric viscosity improver with high viscosity is added to produce a narrow diaphragm or a thin compact diaphragm with high aspect ratio. These diaphragms have high rigidity and a wide reproduction frequency range.
    Type: Application
    Filed: May 1, 2014
    Publication date: August 28, 2014
    Applicant: PANASONIC CORPORATION
    Inventor: YOHEI JIN
  • Patent number: 8790493
    Abstract: The present invention relates to a process for producing paper which comprises: (vii) providing an aqueous suspension comprising cellulosic fibers, (viii) adding to the suspension after all points of high shear a first polymer being a cationic polymer having a charge density above 2.5 meq/g; a second polymer, and a third polymer being an organic or inorganic anionic polymer; and (ix) dewatering the obtained suspension to form paper.
    Type: Grant
    Filed: October 10, 2012
    Date of Patent: July 29, 2014
    Assignee: Akzo Nobel N.V.
    Inventors: Fredrik Solhage, Joakim Carlén, Birgitta Johansson
  • 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
  • Patent number: 8663427
    Abstract: A process in which an at least partially delignified pulp fiber web having a Kappa number of less than about 130 is treated with an aqueous endothermic fire retardant solution having a pH of about 10 or less. The treated pulp fiber web has a near neutral pH of from about 5 to about 9, and is treated with at least about 20 lbs of endothermic fire retardants per ton of the pulp fiber web, with at least about 5% of the total amount of endothermic fire retardants being added at a point prior to when the pulp fiber web is formed. Also a fire resistant pulp fiber web having a near neutral pH.
    Type: Grant
    Filed: April 7, 2011
    Date of Patent: March 4, 2014
    Assignee: International Paper Company
    Inventors: James E. Sealey, Brent A. Fields
  • Publication number: 20140034259
    Abstract: The disclosure provides a paper slurry comprising a treated inorganic pigment, wherein the treated inorganic pigment comprises an inorganic pigment comprising a pigment surface area of about 30 to about 75 m2/g; wherein the pigment surface is treated with an organic treating agent comprising a polyalkanol alkane or a polyalkanol amine, present in the amount of at least about 1.5%, and wherein the treated inorganic pigment has a RHI (rat hole index) of about 7 to about 11.
    Type: Application
    Filed: April 24, 2012
    Publication date: February 6, 2014
    Applicant: E I DU PONT DE NEMOURS AND COMPANY
    Inventor: Daniel C. Kraiter
  • Patent number: 8613832
    Abstract: The present invention relates to a drainage and retention aid composition which comprises: (d) a first anionic component which is a water-soluble anionic organic polymer; (e) a second anionic component which is a water-dispersible or branched anionic organic polymer; and (f) a third anionic component which is an anionic siliceous material; wherein the first, second and third anionic components are present in a dry matter content of from 0.01 to 50% by weight.
    Type: Grant
    Filed: February 15, 2012
    Date of Patent: December 24, 2013
    Assignee: Akzo Nobel N.V.
    Inventors: Johan Nyander, Fredrik Solhage
  • Publication number: 20130306261
    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 dewatering aid by coating at least some of the filler particles with a material that prevents the filler materials form adhering to dewatering aids. The dewatering aid holds the paper fibers together tightly and is not wasted on the filler particles.
    Type: Application
    Filed: May 25, 2012
    Publication date: November 21, 2013
    Inventors: Yulin ZHAO, Jun LI, Qing Long RAO, Weiguo CHENG
  • Patent number: 8568565
    Abstract: The present invention relates to a silica-based sol having a concentration of soluble silica of less than about 1000 mg SiO2/l, conductivity of at least about 2.0 mS/cm and S-value below about 50%. The invention further relates to a method of producing a silica-based sol comprising subjecting an aqueous alkali metal silicate solution to electrodialysis to form an electrodialyzed sol, and acidifying the electrodialyzed sol to form an acidified sol having a pH in the range of from about 5.0 to about 10. The invention further relates to silica-based sol obtainable by the process and to the use of the silica-based sol as a flocculating agent. The invention further relates to a process for producing paper which comprises providing an aqueous suspension comprising cellulosic fibers, adding to the suspension one or more drainage and retention aids comprising a silica-based sol according to the invention, and dewatering the obtained suspension to provide a sheet or web of paper.
    Type: Grant
    Filed: July 10, 2009
    Date of Patent: October 29, 2013
    Assignee: Akzo Nobel N.V.
    Inventors: Marek Tokarz, Hans-Åke Baltsen
  • Publication number: 20130280545
    Abstract: Compositions such as filled and coated papers may include microfibrillated cellulose and inorganic particulate material.
    Type: Application
    Filed: November 9, 2011
    Publication date: October 24, 2013
    Applicant: IMERYS MINERALS LIMITED
    Inventors: John Claude Husband, Per Svending, David Robert Skuse
  • Publication number: 20130192781
    Abstract: A building material for use in forming exterior surface coverings. According to a preferred embodiment, the building material consists of the combination of a paper material, bonding agent, and water. The building material can either be formed directly upon a substrate, such as a wall or ceiling, or otherwise formed as a sheet of material or molding that can thereafter be affixed to a given surface or substrate. The building materials can be customized to have a specific type of color, shape and texture, and can further be utilized in a wide variety of building applications.
    Type: Application
    Filed: March 13, 2013
    Publication date: August 1, 2013
    Applicant: TERRABOARD, INC.
    Inventor: Terraboard, Inc.
  • Patent number: 8460512
    Abstract: The invention provides a three layered reprographic paper having improved strength, stiffness and curl resistance properties, and a method for making same. The paper has a central core layer made largely of cellulose and bulked with a bulking agent such as a diamide salt. A starch-based metered size press coating is pressed on both sides of the core layer, wherein the starch has a high solid content. The coating forms a three layered paper having an I-beam arrangement with high strength outer layers surrounding a low density core.
    Type: Grant
    Filed: June 27, 2008
    Date of Patent: June 11, 2013
    Assignee: International Paper Company
    Inventors: Agne Swerin, Michael Herman, Jay C Song, Sen Yang, Peter F Lee, Ladislav Bednarik
  • Patent number: 8460513
    Abstract: A process in which an at least partially delignified pulp fiber web having a Kappa number of less than about 130 is treated with an aqueous endothermic fire retardant solution having a pH of about 10 or less. The treated pulp fiber web has a near neutral pH of from about 5 to about 9, and is treated with at least about 20 lbs of endothermic fire retardants per ton of the pulp fiber web, with at least about 5% of the total amount of endothermic fire retardants being added at a point prior to when the pulp fiber web is formed. Also a fire resistant pulp fiber web having a near neutral pH.
    Type: Grant
    Filed: April 7, 2011
    Date of Patent: June 11, 2013
    Assignee: International Paper Company
    Inventors: James E. Sealey, Brent A. Fields
  • Publication number: 20130139987
    Abstract: The invention relates to a fiber web and a method for preparing it. The fiber web comprises a filler-containing base web, which is possibly coated with a pigment-containing coating layer. According to the invention, 5-100% of the filler in the base web is made up of cellulose fibrils or lignocellulose fibrils with light-scattering material particles deposited thereon. These coated cellulose fibrils or lignocellulose fibrils constitute at maximum approx. 70% of the weight of the base web. The base web according to the invention contains more than 20% less retention agents than does a web which has the same formation but in which more than 95% of the filler is made up of filler particles known per se.
    Type: Application
    Filed: November 14, 2012
    Publication date: June 6, 2013
    Inventors: Petri SILENIUS, Jari MEURONEN, Markku LESKELA
  • Patent number: 8398821
    Abstract: Fibrous structures comprising an additive, more particularly finished fibrous structures comprising a low surface energy solid additive, and/or sanitary tissue products comprising such finished fibrous structures, are provided.
    Type: Grant
    Filed: May 24, 2011
    Date of Patent: March 19, 2013
    Assignee: The Procter & Gamble Company
    Inventors: Kenneth Douglas Vinson, Michael Scott Prodoehl
  • Patent number: 8354003
    Abstract: The present invention relates to a porous fiber product, which contains chemical pulp or wood fibers, between which structural filler particles are attached, as well as to a method of manufacturing this product, wherein filler drops are produced in a spray dryer from the aqueous solution of the filler, the drops forming filler particles when the water evaporates, the particles being attached to the chemical pulp or wood fibers.
    Type: Grant
    Filed: February 20, 2009
    Date of Patent: January 15, 2013
    Assignee: Nordkalk Oy Ab
    Inventor: Pentti Virtanen
  • Patent number: 8343311
    Abstract: A method for producing paper, cardboard or similar materials, comprising, separately or in a mixture, adding to a fibrous suspension: at least one main retention agent comprising a cationic (co)polymer, and at least one dual retention agent comprising a crosslinked cationic (co)polymer obtained in the form of a dispersion and placed in solution prior to its introduction into the fibrous suspension with gentle stirring. The crosslinked cationic (co)polymer having—a UL viscosity of between 1.3 and 2.7 cps, preferably between 1.5 and 2.4 cps, and—an apparent cationicity ratio of between 25 and 75%. Optionally, before or after the dual agent or the main retention agent are added, one or more tertiary retention agent(s) selected from the group comprising mineral particles and organic polymers carrying anionic charges, is added to the suspension.
    Type: Grant
    Filed: April 10, 2009
    Date of Patent: January 1, 2013
    Assignee: S.P.C.M. SA
    Inventors: Rene Hund, Gatien Faucher
  • Publication number: 20120318471
    Abstract: The invention relates to a process for the preparation of a pigment-cellulosic fibre composite, wherein the pigment comprises an inorganic pigment which comprises local cationic charges, said process comprises contacting an aqueous cellulosic fibre suspension and inorganic pigment particles such that crystals of said pigment are attached to the surface of the fibre, said crystals having a size of at most 5 ?m. The produced composite product can be used as a filler pigment or coating pigment in the production of paper.
    Type: Application
    Filed: February 10, 2011
    Publication date: December 20, 2012
    Inventors: Tarja Turkki, Perttu Heiska
  • Patent number: 8273216
    Abstract: The present invention relates to a process for producing paper which comprises: providing an aqueous suspension comprising cellulosic fibers, adding to the suspension, after all points of high shear, a cationic polysaccharide; and a polymer P2 being an anionic polymer; and, dewatering the obtained suspension to form paper.
    Type: Grant
    Filed: December 20, 2006
    Date of Patent: September 25, 2012
    Assignee: Akzo Nobel N.V.
    Inventors: Fredrik Solhage, Joakim Carlén, Birgitta Johansson
  • Patent number: 8197642
    Abstract: An object of the present invention is to provide an inorganic board lighter in weight and excellent in strength and rigidity, and a method of producing the inorganic board. An inorganic board described in claim 1 for accomplishing the object comprises a hydraulic inorganic material, an inorganic lightweight material, a woody reinforcing material and a calcium silicate hydrate, wherein a ratio of the calcium silicate hydrate to the hydraulic inorganic material is 3-54 parts by mass: 100 parts by mass. Thus, by making an inorganic board, made of a hydraulic inorganic material, an inorganic lightweight material and a woody reinforcing material as main components, further contain a calcium silicate hydrate, an inorganic board which is lightweight and excellent in strength and rigidity can be obtained.
    Type: Grant
    Filed: July 26, 2007
    Date of Patent: June 12, 2012
    Assignee: Nichiha Corporation
    Inventor: Hideo Aizawa
  • Patent number: 8133352
    Abstract: A method of manufacturing high purity fiber cement grades of cellulose fibers is described. Additional washing steps, coupled with an elevated temperature, are used in the process to extensively wash the pulps and remove substantially all COD components remaining in the pulps. The pulps are counter-currently washed by diffusion and dewatering at elevated temperatures following the brown stock washer systems. During the additional washing steps, the pulps are soaked in counter-current heated water for a pre-determined time and some chemicals may be introduced to chemically break down the COD components in the pulps and to make them more soluble in the aqueous solution. The additional washing steps can be performed using existing equipment at conventional pulp mills. A formulation and a process of making fiber reinforced cement composite materials are also described using the low COD and high purity cellulose fibers.
    Type: Grant
    Filed: October 2, 2001
    Date of Patent: March 13, 2012
    Assignee: James Hardie Technology Limited
    Inventors: Donald J. Merkley, Caidian Luo
  • Patent number: 8118976
    Abstract: The present invention concerns a process for the production of a cellulosic product comprising providing a fiber-containing suspension, wherein at least about 60% by weight of the fibers are cellulosic fibers, and dewatering the suspension on a wire to form a cellulosic fiber web, the process further comprising adding silica-based particles to the formed web and a wet strength agent to the suspension and/or to the formed web. The invention also concerns a product obtainable by the process. The invention further concerns a dispersion comprising silica-based particles and a substantially aldehyde-free wet strength agent. A further aspect of the invention concerns a dispersion comprising silica-based particles having a specific surface area ranging from about 1000 to about 1700 m2/g and a wet strength agent. Still another aspect of the invention concerns the use of the dispersion as an additive in a papermaking process.
    Type: Grant
    Filed: April 28, 2008
    Date of Patent: February 21, 2012
    Assignee: Akzo Nobel N.V.
    Inventors: Hans Johansson-Vestin, Arne Andersson, Fredrik Solhage
  • Patent number: 8097127
    Abstract: An aqueous polysilicate composition comprising a polysilicate microgel based component in association with particles derived from colloidal polysilicate. The invention also concerns a process for preparing an aqueous polysilicate composition comprising mixing an aqueous colloidal polysilicate with an aqueous phase of a polysilicate microgel. The aqueous polysilicate composition is more effective than colloidal silica and is more stable than a conventional polysilicate microgel.
    Type: Grant
    Filed: September 13, 2007
    Date of Patent: January 17, 2012
    Assignee: BASF SE
    Inventors: Sakari Saastamoinen, Tero Seppala, David Robert Cordier, Christian Bruce Edmonds
  • Patent number: 8092587
    Abstract: The invention relates to stabilized dispersions of precipitated silicon dioxide, to a process for production thereof and to the use thereof, especially for production of paper coatings for glossy photo paper for inkjet printing.
    Type: Grant
    Filed: January 21, 2011
    Date of Patent: January 10, 2012
    Assignee: Evonik Degussa GmbH
    Inventors: Florian Zschunke, Burkhard Standke, Stefan Scharfe, Christoph Batz-Sohn, Heinz Lach, Andrea Heuschen, Juergen Behnisch, Markus Ruf, Guenter Stein, Tobias Banert
  • Publication number: 20110303377
    Abstract: A method of manufacturing a newsprint paper for offset printing, includes: selecting a filler or fillers having an average grain size of 0.5 to 5 ?m and a zeta potential of 0 mV or above; providing a pulp slurry for making a base paper; adding the filler or fillers to the pulp slurry in an amount of more than 15 percent by weight but less than 40 percent by weight as ash relative to the dry weight of the base paper; and subjecting the resultant slurry to a papermaking machine to obtain the base paper.
    Type: Application
    Filed: August 18, 2011
    Publication date: December 15, 2011
    Applicant: NIPPON PAPER INDUSTRIES CO., LTD.
    Inventors: Fuminari NONOMURA, Tomohiro HIGATA, Yasunori NANRI
  • Publication number: 20110263784
    Abstract: The invention relates to a novel method of preparing silicas and to highly-structured silicas having the following characteristics: a specific surface area CTAB (SCTAB) of between 40 and 525 m2g/g; a specific surface area BET (SBET) of between 45 and 550 m2g; an object size distribution width Ld ((d84?D16)/d50), which is measured by XDC particle size analysis after deagglomeration with ultrasound, of at least 0.91; and a pore-size distribution such that ratio V(d5?d50)/V(d5?d100) is at least 0.66. The invention also relates to the use of said silicas as polymer reinforcing fillers.
    Type: Application
    Filed: June 22, 2011
    Publication date: October 27, 2011
    Applicant: RHODIA CHIMIE
    Inventors: Rémi VALERO, Julien Hernandez
  • Patent number: 8038846
    Abstract: According to the present invention, a process is provided for making paper or board comprising forming a cellulosic suspension that may or may not comprise a filler, flocculating the cellulosic suspension, draining the cellulosic suspension on a screen to form a sheet, wherein the cellulosic suspension is flocculated using a flocculation system comprising the sequential or simultaneous addition of a siliceous material and an organic, cationic or anionic, water-in-water or dispersion micropolymer in a salt solution.
    Type: Grant
    Filed: September 14, 2007
    Date of Patent: October 18, 2011
    Assignee: Kemira Oyj
    Inventors: Marco Savio Polverari, Christopher Michael Lewis, Matthew Gerard Fabian
  • Publication number: 20110247774
    Abstract: The present invention relates to a silica-based sol having a concentration of soluble silica of less than about 1000 mg SiO2/l, conductivity of at least about 2.0 mS/cm and S-value below about 50%. The invention further relates to a method of producing a silica-based sol comprising subjecting an aqueous alkali metal silicate solution to electrodialysis to form an electrodialyzed sol, and acidifying the electrodialyzed sol to form an acidified sol having a pH in the range of from about 5.0 to about 10. The invention further relates to silica-based sol obtainable by the process and to the use of the silica-based sol as a flocculating agent. The invention further relates to a process for producing paper which comprises providing an aqueous suspension comprising cellulosic fibers, adding to the suspension one or more drainage and retention aids comprising a silica-based sol according to the invention, and dewatering the obtained suspension to provide a sheet or web of paper.
    Type: Application
    Filed: July 10, 2009
    Publication date: October 13, 2011
    Applicant: AKZO NOBEL N.V.
    Inventors: Marek Tokarz, Hans-Ake Baltsen
  • Publication number: 20110240240
    Abstract: The invention relates to an aqueous polysilicate composition comprising i) particles of polysilicate seeds, ii) polymerised silicate in intimate association with the polysilicate seeds, iii) cross linkages within the polymerised polysilicate formed from aluminium atoms, aluminium compounds or aluminium ions, iv) cross linkages within the polymerised polysilicate formed from atoms, compounds or ions of a multi-valent metal other than aluminium. Preferably the aqueous polysilicate composition further comprises component v) a water-soluble branched anionic polymer that has been formed from ethylenically unsaturated monomers. The invention also incorporates a method for preparing an aqueous polysilicate composition and also to the use of the aqueous polysilicate composition as a retention/drainage aid in a process of making paper or paperboard.
    Type: Application
    Filed: November 12, 2009
    Publication date: October 6, 2011
    Applicant: BASF SE
    Inventors: Sakari Saastamoinen, Neil Sidney Harris
  • Patent number: 8025768
    Abstract: A continuous fiIter treatment process in which anionic polymer dispersions (latex) are added to common papermaking filler slurries ai ambient temperature and then mixed with water of temperature higher than the glass transition temperature (Tg) of the latex used. To efficiently fix the latex the temperature of the filler/latex mixture must be 30-60° C. higher than ihe Tg of the latex used. The chemical composition of the resin and the type of surfactant used during the emulsion polymerization process of the polymer latex dispersions are important factors for efficiently fixing the latex onto the filler by adding hot water and improving the properties of paper made with the treated filler. Enhanced fixation of anionic latex onto filler using hot water is done in mixing vessels that can control shear and mixing time. The anionic latexes are totally and irreversibly fixed or bound onto the filler particles and the aggregated filler slurry is stable over time.
    Type: Grant
    Filed: June 5, 2008
    Date of Patent: September 27, 2011
    Assignee: Fpinnovations
    Inventors: Makhlouf Laleg, Roderick Collins, Danielle Gagne, Steven Middleton
  • Publication number: 20110226432
    Abstract: A method of mixing at least two chemicals or additives into a process liquid flow flowing in a process liquid flow duct including: feeding a liquid jet to the process liquid flow in the process liquid flow duct, wherein the liquid jet is formed in a feeding device and the liquid jet flows in a transverse direction to a flow direction of the process liquid flow through the process liquid flow duct; mixing the at least two chemicals or additives together to form a mixture; feeding the mixture of the at least two chemicals or additives into the process liquid flow duct with the feeding liquid jet, and mixing the at least two chemicals or additives with the feeding liquid jet in the process liquid flow duct.
    Type: Application
    Filed: May 16, 2011
    Publication date: September 22, 2011
    Applicant: WETEND TECHNOLOGIES OY
    Inventor: Jouni MATULA
  • Publication number: 20110226433
    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: Application
    Filed: March 19, 2010
    Publication date: September 22, 2011
    Inventors: Weiguo Cheng, Ross T. Gray
  • Patent number: 8016979
    Abstract: A chemical solution-containing thin paper wherein a chemical solution is contained in an amount of 5 to 40% by weight with respect to base paper, powders are included in an amount of 0.1 to 30% by weight with respect to the chemical solution, the powders are formed by blending first powders each having an average particle size of 3 to 15 ?m and second powders each having an average particle size of 15 to 40 ?m with a weight ratio of the first powders with respect to the second powders of 0.1:1.9 to 1.9:0.1, and the chemical solution does not include an adhesive ingredient.
    Type: Grant
    Filed: January 12, 2007
    Date of Patent: September 13, 2011
    Assignee: Daio Paper Corporation
    Inventor: Atsushi Konuma
  • Patent number: 8003707
    Abstract: A modified sol-gel method to create metal-rich siliceous material, such as colloidal silica or aluminosilicate particles is disclosed. Initially, the metal salt of choice is added to a silicic acid solution or a silicic acid solution containing aluminum salt. The aluminum is added to vary the metal-support interaction as it forms Al—O—Si linkages within the silica matrix. Besides aluminum, other metals can be added that form M—O—Si (M=Ti, B, etc.) linkages, which do not become reduced when treated with a reducing agent. Once the metal, silicic acid and/or aluminum salt is generated, it is subjected to colloidal growth by addition to a basic heel. Upon colloidal synthesis, the metal salt containing colloidal particle is left as is to maximize colloidal stability or is reduced with hydrazine to produce the zero valence metal-containing colloidal particle.
    Type: Grant
    Filed: December 1, 2009
    Date of Patent: August 23, 2011
    Assignee: Nalco Company
    Inventor: Brian T. Holland
  • Patent number: 7981250
    Abstract: According to the present invention, a process is provided for making paper or board comprising forming a cellulosic suspension that may or may not comprise a filler, flocculating the cellulosic suspension, draining the cellulosic suspension on a screen to form a sheet, wherein the cellulosic suspension is flocculated using a flocculation system comprising the sequential or simultaneous addition of a siliceous material and an organic, cationic or anionic, dispersion micropolymer in a salt solution.
    Type: Grant
    Filed: September 14, 2006
    Date of Patent: July 19, 2011
    Assignee: Kemira Oyj
    Inventors: Marco Savio Polverari, Christopher Michael Lewis, Matthew Gerard Fabian, Sr.
  • Patent number: 7976679
    Abstract: Fibrous structures comprising an additive, more particularly finished fibrous structures comprising a low surface energy solid additive, and/or sanitary tissue products comprising such finished fibrous structures, are provided.
    Type: Grant
    Filed: December 2, 2004
    Date of Patent: July 12, 2011
    Assignee: The Procter & Gamble Company
    Inventors: Kenneth Douglas Vinson, Michael Scott Prodoehl
  • Patent number: RE44519
    Abstract: Starch compositions, including cationic crosslinked starches, and methods of using those starches in papermaking are disclosed. In particular, a cationized crosslinked starch and use of the starch in the wet end system of a paper machine is disclosed. The starch compositions of the disclosure are particularly adapted for customization for specific wet end systems, and allow for modification to correspond to variations in the wet end of the papermaking machine.
    Type: Grant
    Filed: February 24, 2005
    Date of Patent: October 8, 2013
    Assignee: Cargill, Incorporated
    Inventors: Kevin Ray Anderson, David Edward Garlie