Silicon Containing Additive Other Than Clay Patents (Class 162/181.6)
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Patent number: 7201826Abstract: A microparticle retention aid for use in papermaking containing a high performance purified natural zeolite pigment is disclosed. Use of the pigment facilitates manufacture of papers with improved quality and economics. When used as filler, the novel zeolite pigment is readily retained and eliminates print-through in uncoated papers. The novel zeolite pigment is low in abrasion and provides improved coefficient of friction.Type: GrantFiled: May 17, 2004Date of Patent: April 10, 2007Assignee: ZO Mineral Partners Ltd.Inventors: Charles P. Klass, Martin D. Sikora
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Patent number: 7175741Abstract: Hydrogen sulfide is removed or reduced in absorbent products by the use of a particulate material attached to pulp fiber by a retention aid. The particulate material can remove or reduce the hydrogen sulfide in the environment surrounding the fiber. Suitable materials are zinc oxide, calcium oxide, cupric oxide, magnesium oxide, manganese dioxide, manganese oxide and aluminum oxide. Zeolites are also suitable. The particulate material may be combined with a filler prior to attachment to the fiber.Type: GrantFiled: July 16, 2003Date of Patent: February 13, 2007Assignee: Weyerhaeuser, Co.Inventors: Hugh West, Colin Elston, David DeJong
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Patent number: 7169261Abstract: An aqueous sol containing silica-based particles which has an S-value within the range of from 10 to 45%, a viscosity within the range of from 5 to 40 cP, and a molar ratio of SiO2 to M2O, where M is alkali metal or ammonium, within the range of from 10:1 to 40:1, or a silica content of at least 10% by weight. The invention further relates to a process for the production of silica-based particles comprising the steps of: (a) acidifying an aqueous silicate solution to a pH of from 1 to 4 to form an acid sol; (b) alkalising the acid sol at an SiO2 content within the range of from 4.5 to 8% by weight to; (c) allowing particle growth of the alkalised sol for at least 10 minutes, or heat-treating the alkalised sol at a temperature of a least 30° C.; and then (d) alkalising the obtained sol to a pH of at least 10.0.Type: GrantFiled: November 5, 2001Date of Patent: January 30, 2007Assignee: Akzo Nobel N.V.Inventors: Michael Persson, Marek Tokarz, Maj-Lis Dahlgren
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Patent number: 7087360Abstract: An object of the present invention is to provide an interleaf paper for packaging planographic printing plates and preventing breakage of the plate-making layer at the time packaging, and a planographic printing plate package structure using a plurality of the above-mentioned interleaf paper. According to the invention, the interleaf paper for packaging the planographic printing plates is an interleaf paper, which contacts a plate-making layer of a planographic printing plate when packaging the planographic printing plates, and the interleaf paper contains Mg, Al, and Si, each at 0.5% by weight or less.Type: GrantFiled: April 9, 2003Date of Patent: August 8, 2006Assignee: Fuji Photo Film Co., Ltd.Inventors: Yoshitaka Kawamura, Takayuki Usui
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Patent number: 7070749Abstract: Foreign-atom-doped precipitated silicas having a BET surface area of more than 300 m2/g and a maximum surface concentration of the foreign atoms of 0.05 mmol/m2, to a process for preparing them and to the use of the resulting precipitated silicas in papermaking.Type: GrantFiled: December 14, 2001Date of Patent: July 4, 2006Assignee: Degussa AGInventors: Gottlieb-Georg Lindner, Astrid Mueller
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Patent number: 7060127Abstract: Silica-calcium carbonate composition particles having the characteristics of both synthetic silica and calcium carbonate are described along with paper having the particles internally filled therein and a method for making the particles. In the carbonation reaction, which typically involves a step of forming calcium carbonate, while agitating a calcium hydroxide slurry, a mixed gas of carbon dioxide and air is introduced thereinto and synthetic silica, such as colloidal silica or the like, is added before the carbonation rate arrives at 95% but after commencement of the carbonation reaction, followed by further introduction of the mixed gas to continue the carbonation reaction and completion of the carbonation reaction at the time when the pH of the slurry reaches 7, thereby providing the composite particles.Type: GrantFiled: March 2, 2001Date of Patent: June 13, 2006Assignee: Nittetsu Mining Co., Ltd.Inventors: Katsuyuki Tanabe, Kouhei Mitsuhashi
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Patent number: 6977027Abstract: The present invention describes an additive which controls stickies formation and removes anionic trash from recycled old corrugated container furnish, old newsprint furnish, deinked pulp furnish, old magazine grade furnish, coated broke furnish, or thermomechanical pulp furnish. The present invention treats talc with either a tertiary or quaternary amine. The treated talc is then added to the pulp slurry and removes stickies by binding the stickies to the talc and neutralizes the anionic trash that may be present. The present invention also describes a method for modifying talc particles involving contacting a tertiary or quaternary amine with talc particles. The present invention further describes a talc created by the process of contacting a tertiary or quaternary amine with talc particles. The present invention additionally describes a paper product having a modified talc filler wherein the modified talc filler has been contacted with a tertiary or quaternary amine.Type: GrantFiled: September 5, 2002Date of Patent: December 20, 2005Assignee: Luzenae America, Inc.Inventors: Shripal Sharma, Jorge Yordan, Vicente Lasmarias, Jordan Kortmeyer, Alexis Layne, Jason Reynolds
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Patent number: 6893538Abstract: The invention relates to an aqueous silica-based sol comprising a nitrogen-containing organic compound and silica-based particles with a specific surface area of at least 300 square meters per gram of silica. The invention further relates to a process for the production of an aqueous silica-based sol comprising a nitrogen-containing organic compound which comprises incorporating a nitrogen-containing organic compound into a silica-based sol containing silica-based particles with a specific surface area of at least 300 square meters per gram of silica. The invention also relates to the use of an aqueous silica-based sol comprising a nitrogen-containing organic compound and silica-based particles with a specific surface area of at least 300 square meters per gram of silica as a flocculating agent in the production of pulp and paper and in water purification.Type: GrantFiled: November 29, 2000Date of Patent: May 17, 2005Assignee: Akzo Nobel N.V.Inventors: Peter Greenwood, Magnus Olof Linsten, Hans E. Johansson-Vestin
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Patent number: 6890405Abstract: To reduce the problem of tackiness caused by contaminants in recycled paper, effective amounts of talc and a terpene such as D-limonene are added to paper stock in conjunction with chemical fixing agents and retention aids. The terpene increases the affinity of the contaminants for the talc, thus increasing detackification of the contaminants and improving the productivity of the papermaking process.Type: GrantFiled: November 12, 2003Date of Patent: May 10, 2005Assignee: Manistique Papers, Inc.Inventor: Thomas C. C. Mah
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Patent number: 6890652Abstract: A decorative base paper for decorative coating materials having a pigment component of 10 to about 65% by wt., comprises a modified titanium dioxide containing silicon and aluminum, in mixture with a further white pigment.Type: GrantFiled: February 9, 2002Date of Patent: May 10, 2005Assignee: Technocell Dekor GmbH & Co. KGInventor: Hartmut Schulz
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Patent number: 6887351Abstract: The invention relates to a process for regulating the porosity and printing properties of paper, in particular uncoated wood-containing paper such as SC-paper, wherein a sufficient quantity of colloidal PCC having a BET surface area of 10-100 m2/g is used as a filter in the paper to achieve a desired porosity of the paper; as well as paper containing colloidal PCC as filler, and a pigment mixture suitable for paper manufacture and containing colloidal PCC.Type: GrantFiled: May 27, 1999Date of Patent: May 3, 2005Assignee: J. M. Huber Denmark ApSInventors: Klaus Akilles Lunden, Ib Attrup, Jens Toftelund Madsen
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Patent number: 6869471Abstract: The present invention relates to a process for sizing paper comprising providing an aqueous suspension comprising cellulosic fibres, dewatering said aqueous suspension thereby forming a paper web, said process comprising adding to the cellulosic suspension an aqueous composition comprising aggregates comprising a sizing agent, the composition obtainable by mixing in any order prior to the addition to the aqueous suspension, (i) an aqueous solution comprising at least one coagulation agent, and (ii) an aqueous dispersion comprising a sizing agent, wherein the zeta potential of the composition is less than 20 mV. The invention also refers to an aqueous sizing composition.Type: GrantFiled: November 19, 2002Date of Patent: March 22, 2005Assignee: Akzo Nobel N.V.Inventors: Lars Ödberg, Rosa Mattsson, Pavol Barla
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Patent number: 6855404Abstract: A laminate of inorganic sheet and polyester resin having an overall thickness of 5 to 25 mils and having an elongation at break in both the cross direction and machine direction of at least 25%.Type: GrantFiled: March 13, 2003Date of Patent: February 15, 2005Assignee: E. I. du Pont de Nemours and CompanyInventors: David Wayne Anderson, Dariusz Wlodzimierz Kawka
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Publication number: 20040244929Abstract: A process for producing a fade-resistant paper in which a cationic charged dye fixative is thoroughly mixed with fibers in a pulper, and a fade resistant pigment is added. To this mixture is added a three component retention system and the paper is formed on a Fourdrinier paper machine. After initial drying, the paper is treated with ethylated starch on a size press, and then finally dried.Type: ApplicationFiled: June 3, 2003Publication date: December 9, 2004Inventors: Jason D. Henke, Stephen J. Swanson
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Publication number: 20040238137Abstract: A process of preparing an aqueous composition comprising a polysilicate, wherein the composition is a substantially uniform liquid when measured at 25° C.Type: ApplicationFiled: March 24, 2004Publication date: December 2, 2004Inventors: Simon Donnelly, Laurence J. Rys, Philip A. Ford
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Patent number: 6824651Abstract: This invention discloses a talc additive for use as a filler in making paper products which is useful in preventing dusting or linting of paper. Also disclosed is a method of making the additive and using it in making paper.Type: GrantFiled: March 31, 2003Date of Patent: November 30, 2004Assignee: Luzenec America, Inc.Inventors: Vicente Lasmarias, Shripal Sharma, Alexis Layne
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Patent number: 6808598Abstract: Herein provided is a water-decomposable fibrous sheet includes water-dispersible fibers having a fiber length of at most 20 mm, and a gel compound.Type: GrantFiled: September 29, 2000Date of Patent: October 26, 2004Assignee: Uni-Charm CorporationInventors: Naohito Takeuchi, Takayoshi Konishi
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Patent number: 6800267Abstract: Aluminum-doped precipitated silicas having a BET surface area of more than 300 m2/g and aluminum distributed uniformly in the silica particles are prepared by sequentially heating a mixture of water and sodium silicate at a temperature of from 70 to 86° C. and adding sulfuric acid until half of the sodium silicate is neutralized, then aging the mixture for a time of from 30 to 120 minutes, adjusting the pH of the mixture with sulfuric acid to a range of from 3.0 to 7.0, thereby precipitating the aluminum-doped silica, filtering the aluminum-doped silica from the mixture to form a filtercake and washing the filtercake, followed by drying and/or grinding the washed filtercake. An aluminum salt solution is metered into the mixture at step a) and/or step c). The aluminum-doped precipitated silicas of the present invention may be used in coatings for paper and other media intended for ink jet printing.Type: GrantFiled: August 29, 2001Date of Patent: October 5, 2004Assignee: Degussa AGInventors: Jürgen Schubert, Klaus-Dieter Hellwig, Astrid Muller
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Publication number: 20040178142Abstract: Disclosed is an integrated paper wherein the paper has capabilities and functionalities provided by both the fiber and the active agent ingredients, and a method of immobilizing the active agents within the integrated paper. The tight pore structure of the integrated paper of the present invention, a mean pore diameter of less than about 2 microns, provides short diffusion distances from a fluid to the surface of the paper ingredients by adsorption or diffusive interception making it an excellent medium for fluid filtration. The integrated paper of the present invention can further include a microbiological interception enhancing agent. The integrated paper can be formed using, preferably, wet laid paper-making processes for speed and efficiency. Also disclosed are devices utilizing the integrated paper useful in fluid filtration.Type: ApplicationFiled: September 19, 2003Publication date: September 16, 2004Inventor: Evan E. Koslow
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Patent number: 6783631Abstract: A decorative base paper for decorative coating materials contains a pigment mixture of titanium dioxide and talc, wherein the talc has a particle size distribution D50 of less than approximately 3.0 &mgr;m, and both the decorative base paper and the decorative paper have a high capacity.Type: GrantFiled: November 13, 2001Date of Patent: August 31, 2004Assignee: Technocell Dekor GmbH & Co. KGInventor: Hartmut Schulz
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Publication number: 20040149407Abstract: Process for making paper or paper board comprising, forming an aqueous cellulosic suspension, adding a retention system to the cellulosic suspension, draining the suspension on a screen to form a sheet and drying the sheet, wherein the retention system comprises a swelling clay which has a TAPPI brightness of at least 70.Type: ApplicationFiled: December 4, 2003Publication date: August 5, 2004Inventors: Gordon Cheng Chen, Stephanie Caine Williams
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Publication number: 20040104004Abstract: The invention relates to a cationised polysaccharide product comprising a polysaccharide having at least one first substituent having an aromatic group and at least one second substituent having no aromatic group. The invention further relates to a cationised polysaccharide product comprising one or more polysaccharides having at least one first substituent having an aromatic group and one or more polysaccharides having at least one second substituent having no aromatic group. The present invention also relates to a method for the preparation of a cationised polysaccharide product comprising reacting one or more polysaccharides with at least one aromatic agent and at least one non-aromatic agent. The invention further relates to a method for the preparation of a cationised polysaccharide product comprising reacting a first polysaccharide with at least one aromatic agent, reacting a second polysaccharide with at least one second non-aromatic agent, and then mixing the polysaccharides obtained.Type: ApplicationFiled: October 1, 2003Publication date: June 3, 2004Inventors: Fredrik Solhage, Per-Ola Nilsson
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Patent number: 6740202Abstract: A speaker diaphragm is formed from a material combining a fiber-type material and a ceramic-type-coating agent including metal alkoxide, metal hydroxide, and a colloidal or fine-particulate inorganic substance. The combining process for the ceramic-type-coating agent is performed before or after the fiber-type material is formed into a shape of the diaphragm.Type: GrantFiled: March 29, 2002Date of Patent: May 25, 2004Assignees: Pioneer Corporation, Tohoku Pioneer Corporation, Nippan Kenkyujo Co., Ltd.Inventors: Toshihiro Ishigaki, Hideo Sekikawa, Koji Maekawa, Tomoyuki Shimada
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Publication number: 20040079504Abstract: The invention concerns a precipitate silica suspension, said silica containing, bound to its surface at least a metal element at least divalent. The invention is characterised in that the silica particles have a median diameter in volume less than 2 &mgr;m. The invention further concerns the use of said suspension as paper filler and more particularly for enhancing printing properties.Type: ApplicationFiled: December 2, 2003Publication date: April 29, 2004Inventors: Marie-Odile Lafon, Christophe Eychenne-Baron, Jean-Noel Jas
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Patent number: 6726807Abstract: A method for the hydrothermal preparation of calcium silicate hydrates. Multi-phase calcium silicate hydrates, having unique physical and chemical properties, are prepared by hydrothermal reaction of specified ratios of CaO and SiO2, normally starting from slurries of slaked lime and from fluxed calcined diatomaceous earth, each of which is at about the atmospheric boiling point before being mixed and charged to a reactor, and pressurized. The hydrothermal reaction is carried out while maintaining the initial dilution for a preselected reaction time at a preselected reaction temperature. The calcium silicate hydrates produced have high water absorption and light scattering power, and have optical and physical properties making them highly desirable as a filler substitute in papermaking.Type: GrantFiled: August 26, 2000Date of Patent: April 27, 2004Assignee: G.R. International, Inc. (A Washington Corporation)Inventor: Vijay K. Mathur
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Publication number: 20040069429Abstract: An element made by papermaking for use in the production of a die casting which comprises an organic fiber, an inorganic fiber, and a binder. The contents of the organic fiber, the inorganic fiber, and the binder are preferably 10 to 70 parts by weight, 1 to 80 parts by weight, and 10 to 85 parts by weight, respectively. The binder is preferably an organic binder. The organic fiber is preferably pulp fiber.Type: ApplicationFiled: August 20, 2003Publication date: April 15, 2004Inventors: Tokuo Tsuura, Hiroaki Kobayashi, Yoshimasa Takagi, Shigeo Nakai, Tokihito Sono
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Patent number: 6716314Abstract: A method for forming an abrasion resistant sheet which comprises forming a web of cellulosic fibers on a papermaking machine and applying a slurry including an encapsulated abrasion-resistant grit to the upper surface of the web on the papermaking machine.Type: GrantFiled: February 27, 2001Date of Patent: April 6, 2004Assignee: MeadWestvaco CorporationInventors: Mark A. Johnson, John Benson, Mahendra Mehta, Steve Canary, Eric Girardin
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Patent number: 6712934Abstract: The invention relates to a method for the production of paper or board, wherein retention aids are added to the stream of stock. Improved retention and more effective dewatering are achieved by adding to the stream of stock a cationic polymer solution and a suspension-form microparticle mixture composed of a swellable clay of the smectite group and a colloidal synthetic metal silicate in which the prevalent cation is magnesium.Type: GrantFiled: May 31, 2002Date of Patent: March 30, 2004Assignee: Kemira Chemicals OyInventors: Jonni Ahlgren, Kimmo Strengell
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Publication number: 20040050515Abstract: A method for the production of a fiber web from a fiber stock suspension including a filler, including the steps of: selecting at least one size of at least one filler particles for a predetermined color of the fiber web, including at least one filler particles in the filler, adding at least one filler including at least one filler particles of at least one size in the fiber stock suspension and producing the fiber web in the predetermined color.Type: ApplicationFiled: September 13, 2002Publication date: March 18, 2004Inventor: Klaus Doelle
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Patent number: 6706148Abstract: The invention relates to a method for affixing a mineral filler onto an aqueous cellulose-fiber suspension. In this invention, the method uses as its reaction medium an aqueous cellulose-fiber suspension which is derived from papermaking and which includes at least hydrogen carbonates, carbonates or silicates of alkali and/or earth alkali metals, and the invention adds to the reaction medium a hydroxide of the filler mineral in order to precipitate the mineral filler's carbonates or silicates onto the fibers. In particular, the invention applies to papermaking.Type: GrantFiled: May 20, 2002Date of Patent: March 16, 2004Assignee: Georgia-Pacific FranceInventors: Didier Joisson, Christian Richard, Gilbert Schohn, Cyrille Schu
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Publication number: 20040045686Abstract: A coated printing paper the product of whose basis weight, density, Young's modulus in the machine direction and breaking length in the machine direction is within the range of no less than 1.0×1021g2·N/m6 but not greater than 4.0×1021g2·N/m6, and which offers excellent pliability, superior print gloss in the image area regardless of lower white-paper gloss, minimal small-scale gloss variations in the image area, and excellent workability with the printing machinery, more particularly a matte coated paper, is provided.Type: ApplicationFiled: September 12, 2003Publication date: March 11, 2004Inventors: Hideaki Nisogi, Jun Makihara, Takehide Kasahara, Takashi Ochi, Hirokazu Morii, Hideki Fujiwara
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Patent number: 6702922Abstract: A process for forming an abrasion resistant, decorative sheet which comprises forming a web of cellulosic fibers on a papermaking machine and applying a coating suspension including an abrasion-resistant grit and decorative inclusion particles to the upper surface of the web on the papermaking machine.Type: GrantFiled: July 17, 2002Date of Patent: March 9, 2004Assignee: MW Custom Papers, LLCInventors: Eric Wagner, Dennis Hankey
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Publication number: 20040040683Abstract: The invention relates to an improved paper production process, according to which a branched polymer prepared in reverse phase emulsion is used as the main retention aid, and then bentonite is used as the secondary retention aid (a dual type system). The two additions are separated by a stage for shearing the fibrous suspension (or mass).Type: ApplicationFiled: September 3, 2003Publication date: March 4, 2004Applicant: SNF SAInventors: Rene Hund, Christian Jehn-Rendu
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Patent number: 6685907Abstract: The present invention relates to a process for easily and efficiently producing silica particles having a narrow particle size distribution and a high porosity from inexpensive starting materials such as sodium silicate. The silica particles of the present invention can be obtained in the form of a slurry containing them by (1) forming a slurry by mixing first particles difficultly soluble in an alkali and soluble in an acid, with an aqueous alkali silicate solution to form a first slurry containing the first particles, (2) neutralizing the first slurry with a mineral acid to prepare a second slurry containing second particles wherein silica is deposited on the first particles, and (3) adding a mineral acid to the second slurry to dissolve the first particles from the second particles, to prepare a third slurry containing silica particles.Type: GrantFiled: April 12, 2001Date of Patent: February 3, 2004Assignee: Oji Paper Co., Ltd.Inventors: Masashi Matsuda, Masasuke Watanabe, Hitoshi Okada, Motohide Wada, Osamu Kitao
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Publication number: 20040011486Abstract: A process for forming an abrasion resistant, decorative sheet which comprises forming a web of cellulosic fibers on a papermaking machine and applying a coating suspension including an abrasion-resistant grit and decorative inclusion particles to the upper surface of the web on the papermaking machine.Type: ApplicationFiled: July 17, 2002Publication date: January 22, 2004Inventors: Eric Wagner, Dennis Hankey
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Patent number: 6679973Abstract: A high performance purified natural zeolite pigment composition for use in papermaking and paper coating is disclosed. Use of the pigment facilitates manufacture of coated ink jet and digital printing papers with improved quality and economics. The novel zeolite pigment composition can also be used as a supplementary pigment to improve the properties of coated paper and paperboard for flexographic and water-based gravure printing. When used as filler, the novel zeolite pigment composition is readily retained and eliminates print-through in uncoated papers. The novel zeolite pigment is low in abrasion and provides improved coefficient of friction. The novel zeolite pigment is also useful as a microparticulate retention aid in papermaking and as an additive to improve the performance of deinking processes.Type: GrantFiled: June 4, 2003Date of Patent: January 20, 2004Assignee: Zo Resources, LLCInventors: Charles P. Klass, Margaret K. Joyce
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Patent number: 6676719Abstract: A pyrogenic process is used to prepare alkali-doped silica particles. Particles produced by this process exhibit homogeneous doping, reduced agglomeration, greater stability and higher removal rates. Aqueous dispersions containing alkali-doped pyrogenic silica with average particle size less than 100 nm are used for polishing surfaces (CMP).Type: GrantFiled: December 21, 2001Date of Patent: January 13, 2004Assignee: Degussa AGInventors: Wolfgang Lortz, Christoph Batz-Sohn, Helmut Mangold, Gabriele Perlet, Werner Will
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Patent number: 6673208Abstract: The present invention relates to polysilicate microgels, their preparation and use in paper making and water purification, the polysilicate microgels being obtainable by a process which comprises bringing into contact (i) particles of a salt AB with an aqueous silicate or polysilicate solution, (ii) an ion A with an ion B in the presence of an aqueous silicate or polysilicate solution, whereby the salt AB is precipitating in the aqueous phase, or (iii) an ion A with an ion B in the presence of an aqueous silicate or polysilicate solution, whereby the ions A and B represent ions of a precipitable salt AB having a pKS value of at least 4, measured at 20° C. in water. The invention further relates to aqueous silicate or polysilicate solutions, their preparation and use as precursors for polysilicate microgels.Type: GrantFiled: July 1, 2002Date of Patent: January 6, 2004Assignee: Akzo Nobel N.V.Inventors: Michael Persson, Marek Tadeusz Tokarz, Rein Sikkar
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Patent number: 6663683Abstract: An aqueous dispersion containing a cerium oxide-doped, pyrogenically produced silicon dioxide, wherein the cerium oxide is introduced through an aerosol of a cerium salt solution or suspension and the average particle size in the dispersion is less than 100 nm. The dispersion is produced by dispersing the cerium oxide-doped, pyrogenically produced silicon dioxide in aqueous solution by means of a high energy input. The aqueous dispersion can be used for chemical-mechanical polishing.Type: GrantFiled: November 1, 2001Date of Patent: December 16, 2003Assignee: Degussa AGInventors: Wolfgang Lortz, Christoph Batz-Sohn, Gabriele Perlet, Werner Will
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Publication number: 20030205344Abstract: This invention discloses a talc additive for use as a filler in making paper products which is useful in preventing dusting or linting of paper. Also disclosed is a method of making the additive and using it in making paper.Type: ApplicationFiled: March 31, 2003Publication date: November 6, 2003Applicant: Luzenac America, Inc.Inventors: Vicente Lasmarias, Shripal Sharma, Alexis Layne
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Publication number: 20030205346Abstract: A high performance purified natural zeolite pigment composition for use in papermaking and paper coating is disclosed. Use of the pigment facilitates manufacture of coated ink jet and digital printing papers with improved quality and economics. The novel zeolite pigment composition can also be used as a supplementary pigment to improve the properties of coated paper and paperboard for flexographic and water-based gravure printing. When used as filler, the novel zeolite pigment composition is readily retained and eliminates print-through in uncoated papers. The novel zeolite pigment is low in abrasion and provides improved coefficient of friction. The novel zeolite pigment is also useful as a microparticulate retention aid in papermaking and as an additive to improve the performance of deinking processes.Type: ApplicationFiled: June 4, 2003Publication date: November 6, 2003Inventors: Charles P. Klass, Margaret K. Joyce
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Patent number: 6623848Abstract: The invention relates to absorvents for water and aqueous liquids, which are vased on water-swell-able, yet water-insoluble polymers wherein cyclodextrin or cyclodextrin derivatives and zeolites high in silicon have been incorporated ionically, covalently and/or as a result of mechanical inclusion.Type: GrantFiled: February 14, 2002Date of Patent: September 23, 2003Assignee: Stockhausen GmbH & Co. KGInventors: Helmut Brehm, Jorg Harren, Jorg Issberner, Richard Mertens
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Patent number: 6616806Abstract: A process for making paper comprising forming a cellulosic suspension, flocculating the suspension, draining the suspension on a screen to form a sheet and then drying the sheet, wherein the cellulosic suspension is flocculated by addition of a water soluble polymer which is selected from a) a polysaccharide or b) a synthetic polymer of intrinsic viscosity at least 4 dl/g and then reflocculated by a subsequent addition of a reflocculating system, wherein the reflocculating system comprises i) a siliceous material and ii) a water soluble polymer. In one aspect the siliceous material is added prior to or simultaneous with the water soluble polymer. In an alternative for the water soluble polymer is anionic and added prior to the siliceous material.Type: GrantFiled: August 2, 2002Date of Patent: September 9, 2003Assignee: Ciba Specialty Chemicals Water Treatments LimitedInventor: Gordon Cheng I Chen
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Patent number: 6610136Abstract: Aggregated mineral pigments (such as kaolin clay pigments) having a high surface area and useful in coating and filling compositions for ink jet printing media are manufactured by dry grinding an unground mineral composition starting material and then optionally acid treating the ground material.Type: GrantFiled: March 21, 2002Date of Patent: August 26, 2003Assignee: Thiele Kaolin CompanyInventors: Prakash B. Malla, Siva Devisetti
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Publication number: 20030143144Abstract: The present invention describes an additive which controls stickies formation and removes anionic trash from recycled old corrugated container furnish, old newsprint furnish, deinked pulp furnish, old magazine grade furnish, coated broke furnish, or thermomechanical pulp furnish. The present invention treats talc with either a tertiary or quaternary amine. The treated talc is then added to the pulp slurry and removes stickies by binding the stickies to the talc and neutralizes the anionic trash that may be present.Type: ApplicationFiled: September 5, 2002Publication date: July 31, 2003Applicant: Luzenac America, Inc.Inventors: Shripal Sharma, Jorge Yordan, Vicente Lasmarias, Jordan Kortmeyer, Alexis Layne, Jason Reynolds
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Publication number: 20030139517Abstract: The present invention refers to a process for the production of paper from a suspension containing cellulosic fibers, and optionally fillers, comprising adding to the suspension at least one cationic organic polymer and an aqueous silica-containing composition comprising an anionic naphthalene sulphonate formaldehyde condensate and anionic silica-based particles, the composition having a weight ratio of naphthalene sulphonate formaldehyde condensate to silica-based particles within the range of from 0.2:1 to 99:1, and containing naphthalene sulphonate formaldehyde condensate and silica-based particles in an amount of at least 0.01% by weight, based on the total weight of the aqueous silica-containing composition, and with the proviso that the composition contains substantially no cellulose-reactive sizing agent. The invention also encompasses an aqueous silica-containing composition and a method for preparation of an aqueous silica-containing compound.Type: ApplicationFiled: December 20, 2002Publication date: July 24, 2003Inventors: Johan Nyander, Hans Johansson-Vestin, Jan Nordin, Annika Viola Pal
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Publication number: 20030136534Abstract: The present invention relates to an aqueous silica-containing composition comprising an anionic organic polymer having at least one aromatic group and anionic aggregated or microgel formed silica-based particles. The aqueous silica-containing composition contains the anionic organic polymer having at least one aromatic group and the anionic silica-based particles in an amount of at least 0.01% by weight of the total weight of the aqueous silica-containing composition. The aqueous silica-containing composition contains substantially no cellulose-reactive sizing agent and the anionic organic polymer having at least one aromatic group is not an anionic naphthalene sulphonate formaldehyde condensate.Type: ApplicationFiled: December 20, 2002Publication date: July 24, 2003Inventors: Hans Johansson-Vestin, Johan Nyander, Jan Nordin
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Publication number: 20030138600Abstract: The invention relates to a method for making paper, which is characterized in that the paper is impregnated with an acrylate-containing dispersion or mixture and the acrylate-containing dispersion or mixture is forced into the paper. The paper so produced can be used to produce boards, especially floor panels even if said panels have only a mass per unit area of 15 to 35 g/m2, thereby reducing the costs of production of such panels.Type: ApplicationFiled: March 1, 2002Publication date: July 24, 2003Inventors: Dieter Dohring, Josef Stutz
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Publication number: 20030127205Abstract: The present invention relates to a process for sizing paper comprising providing an aqueous suspension comprising cellulosic fibres, dewatering said aqueous suspension thereby forming a paper web, said process comprising adding to the cellulosic suspension an aqueous composition comprising aggregates comprising a sizing agent, the composition obtainable by mixing in any order prior to the addition to the aqueous suspension, (i) an aqueous solution comprising at least one coagulation agent, and (ii) an aqueous dispersion comprising a sizing agent, wherein the zeta potential of the composition is less than 20 mV. The invention also refers to an aqueous sizing composition.Type: ApplicationFiled: November 19, 2002Publication date: July 10, 2003Inventors: Lars Odberg, Rosa Mattsson, Pavol Barla
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Patent number: 6565646Abstract: This invention discloses a talc additive for use as a filler in making paper products which is useful in preventing dusting or linting of paper. Also disclosed is a method of making the additive and using it in making paper.Type: GrantFiled: November 2, 2001Date of Patent: May 20, 2003Assignee: Luzenac America, Inc.Inventors: Vicente Lasmarias, Shripal Sharma, Alexis Layne