Gum Patents (Class 162/178)
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Patent number: 6296696Abstract: A one-pass, non-tolerance dependent method for preparing paper size emulsions comprising an aqueous emulsion of a substituted cyclic dicarboxylic anhydride, a colloidal stabilizer, and a surfactant wherein the emulsion after one-pass through a dispersion system has an average particle size of less than 2 microns.Type: GrantFiled: December 15, 1998Date of Patent: October 2, 2001Assignee: National Starch & Chemical Investment Holding CorporationInventors: Michel D. Létourneau, Walter Maliczyszyn
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Patent number: 6290814Abstract: The present invention provides an improved method for sizing paper which comprises the step of coating paper with a composition comprising gellan gum and a derivatized starch wherein the derivatized starch and the gellan gum are present at a weight ratio of from 300:1 to 1000:1. Also provided by the invention are improved papers adapted for ink jet printing characterized by an ash content of from 5% to 30% by weight, permeability characterized by an HST score in the range of over 200 seconds and treated with a surface size comprising gellan gum and a derivatized starch wherein the derivatized starch and the gellan gum are present at a weight ratio of from 100:1 to 1000.Type: GrantFiled: March 29, 2000Date of Patent: September 18, 2001Assignees: Penford Corporation, Pharmacia CorporationInventors: LuAnn E. Rooff, Catherine Bennett, Frank J. Miskiel
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Patent number: 6270626Abstract: The invention concerns a novel method for making paper based on sheet cellulose fibre, wherein a novel retention system comprising a suspension of bentonite and a cationic galactomannan is used to improve in particular the retention of the incorporated mineral fillers. The invention also concerns a method for making paper using a retention system which substantially improves draining.Type: GrantFiled: February 9, 2001Date of Patent: August 7, 2001Assignee: Rhodia ChimieInventor: Herbert Hruschka
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Patent number: 6270627Abstract: The invention comprises a borosilicate retention aid composition and a method for improving the production of paper by addition of the borosilicate. The borosilicate may be utilized in conjunction with a high molecular weight synthetic flocculant and/or starch, with or without the addition of a cationic coagulant. The borosilicate material is preferably a colloidal borosilicate. Methods for the preparation of the borosilicate material are disclosed.Type: GrantFiled: November 22, 1999Date of Patent: August 7, 2001Assignee: Nalco Chemical CompanyInventors: Bruce A. Keiser, James E. Whitten
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Patent number: 6251223Abstract: A process for improving gravure and offset printability of coated and uncoated printing papers by increasing filler share in the paper on the top and bottom sides or in the outer layers of the paper web by using a retention agent, and providing the outerlayers of the fiber bearing liquid forming the paper web with additional retention agent before or during sheet formation on or between the wires of the paper making machine.Type: GrantFiled: January 11, 1999Date of Patent: June 26, 2001Assignee: Stora Publication Paper AGInventors: Hansjörg Kessler, Dieter Horand, Wolfram Friesen
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Patent number: 6241853Abstract: A soft, flexible yet strong paper product is provided from the unique configuration of particular pulp types, cationic wet strength resins, and anionic processing aids.Type: GrantFiled: December 10, 1998Date of Patent: June 5, 2001Assignee: Kimberly Clark Worldwide, Inc.Inventors: Michael John Smith, Gary L. Bushman
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Patent number: 6217709Abstract: A composition comprising cationic starch, cationic galactomannan gum (such as cationic guar, locust bean and fenugreek gum) and acid suitable as drainage aid and strength additive in papermaking.Type: GrantFiled: November 23, 1998Date of Patent: April 17, 2001Assignee: Hercules IncorporatedInventor: Keith Edward Burnfield
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Patent number: 6179962Abstract: Process for making paper having improved strength characteristics by adding to the pulp water-soluble and/or water-dispersible cationic polymer and oxidized galactose type of alcohol configuration containing polymer.Type: GrantFiled: December 31, 1997Date of Patent: January 30, 2001Assignee: Hercules IncorporatedInventors: Richard Lee Brady, Raymond Thomas Leibfried, Sr., Tuyen Thanh Nguyen
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Patent number: 6051160Abstract: This invention relates to a liquid composition for the control of pitch deposition in pulp and paper making comprising an aqueous solution of (1) a derivatized cationic guar, and (2) styrene maleic anhydride copolymer. The invention also relates to a process for inhibiting pitch deposition in pulp and papermaking systems and on papermaking equipment.Type: GrantFiled: April 15, 1998Date of Patent: April 18, 2000Assignee: Ashland Inc.Inventors: Linda M. Hlivka, George K. Wai
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Patent number: 6030443Abstract: A paper coating composition has therein an optical brightening agent (OBA) and a water-soluble non-ionic polysaccharide derivative, exhibiting a solution viscosity in water of less than 1500 cps when dissolved at 5% polymer concentration, wherein the paper coating provides improved optical brightness as compared to the same formulation without said non-ionic, polysaccharide derivative. A paper coated with this composition has an optical brightness value of greater than 70.Type: GrantFiled: April 29, 1999Date of Patent: February 29, 2000Assignee: Hercules IncorporatedInventors: Eric F. Bock, Charles L. Burdick, L. Drake Walsh
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Patent number: 5993530Abstract: A thermally-decomposable, biodegradable resin composition is dispersed and stabilized in water optionally along with additives to give an aqueous dispersion of the resin composition. In the dispersion, the base polymer consists substantially of a water-insoluble starch-type, biodegradable resin. The dispersion is usable in various fields of papermaking, non-woven fabric production, film and sheet production and woven fabric production, in those of dispersed adhesive production, and in those of metal processing, plastic processing, wood processing and stone processing.Type: GrantFiled: March 9, 1998Date of Patent: November 30, 1999Assignee: Japan Corn Starch Co., Ltd.Inventors: Hideyuki Tanaka, Nobuhiro Hosokawa, Nobuyuki Sugtura, Masato Takahara
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Patent number: 5989391Abstract: A product obtained by reacting a sulfonated amino resin and an amino group-containing substance in a weight ratio of from 1:0.05 to 1:3.Type: GrantFiled: October 27, 1997Date of Patent: November 23, 1999Assignee: Nissan Chemical Industries, Ltd.Inventors: Yoshitane Watanabe, Kiyomi Ema, Takaichi Sugiyama, Hisanobu Urahata, Michie Kaneko
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Patent number: 5876562Abstract: An aqueous anionic sizing dispersion which comprises an anionic dispersion of a cellulose-reactive sizing agent and colloidal anionic aluminum modified silica-based particles. The dispersion is used in the production of paper, board or cardboard whereby the dispersion is either added to the stock or applied as a surface size.Type: GrantFiled: May 28, 1997Date of Patent: March 2, 1999Assignee: Eka Chemicals ABInventor: Hans Johansson
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Patent number: 5873978Abstract: Provided is a recording paper having a feeling of plain paper suitable for ink jet recording with water-base ink, with the recording paper having in both machine and cross directions an irreversible shrinkage factor of from -0.10% to +0.10% when it is put under an environment that the relative humidity thereof is changed from 35% to 90% and further changed to 35%.Type: GrantFiled: February 28, 1997Date of Patent: February 23, 1999Assignee: Nippon Paper Industries Co., Ltd.Inventors: Yoshihiro Kuroyama, Yoichi Yamazaki, Yasunori Nanri
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Patent number: 5871616Abstract: Enzymatic dehalogenation of undesirable nitrogen-free organohalogen compounds is carried out by adding a dehalogenase to an aqueous composition comprising a nitrogen-free organohalogen compound and a nitrogen-containing cationic polymer. The enzymatic dehalogenation of the nitrogen-free organohalogen compound is achieved without any substantial effect upon the nitrogen-free organohalogen compound. The dehalogenation method may be carried out via continuous, batch, or semi-continuous processes.Type: GrantFiled: June 7, 1995Date of Patent: February 16, 1999Assignee: Hercules IncorporatedInventors: Alan Bull, David J. Hardman, Brian M. Stubbs, Paul J. Sallis
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Patent number: 5853539Abstract: Dry strength additives used to enhance the properties of creped tissues are applied to the surface of the Yankee dryer along with the creping adhesive formulation and thereafter transferred to the tissue web as the tissue web is being adhered to the Yankee. When dry strength agents are applied in this manner, less dust and lint are accumulated resulting in improved productivity and product quality.Type: GrantFiled: July 21, 1997Date of Patent: December 29, 1998Assignee: Kimberly-Clark Worldwide, Inc.Inventors: Michael John Smith, Stephen John McCullough
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Patent number: 5849155Abstract: The invention describes a method for dispersion of cellulose based fibers in water. The raw material, which particularly may be recycled paper, is first wetted with water. By a combination of addition of hydrocolloid which binds water, and strong kneading at high solid content, the mixture is transformed into a modulable paste. The high viscosity of the paste effectively conveys the shear forces of the kneading machine to make the fibers flexible and tear them apart. When the kneading is terminated, the hydrocolloid prevents the fibers from reassociation into fiber bundles.Type: GrantFiled: November 6, 1995Date of Patent: December 15, 1998Assignee: E. Khashoggi Industries, LLCInventor: Stein Gasland
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Patent number: 5785813Abstract: An efficient and effective method for treating tissue making stock to make soft tissues involves adding a softening agent to a first papermaking furnish of short fibers, such as eucalyptus fibers. A second papermaking furnish of long fibers, such as softwood fibers, is blended with the short fiber furnish. Thereafter, wet strength agents and/or dry strength agents are added to the blended furnish. The treated furnish is then fed to a headbox and processed into soft tissue in any suitable manner.Type: GrantFiled: February 24, 1997Date of Patent: July 28, 1998Assignee: Kimberly-Clark Worldwide Inc.Inventors: Michael John Smith, Vinay Kumar Rao, Gary Lee Shanklin
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Patent number: 5744003Abstract: This invention relates to a liquid composition for the control of pitch deposition in pulp and paper making comprising an aqueous solution of (1) a derivatized cationic guar, and (2) styrene maleic anhydride copolymer.Type: GrantFiled: July 30, 1996Date of Patent: April 28, 1998Assignee: Ashland Inc.Inventors: Linda M. Hlivka, George K. Wai
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Patent number: 5707493Abstract: A temperature-activated polysilicic acid is prepared by heating an acidified aqueous alkali metal silicate. The temperature-activated polysilicic acid is used in the production of paper for improvement of retention and water removal.Type: GrantFiled: January 29, 1996Date of Patent: January 13, 1998Assignee: J.M. Huber CorporationInventor: Sakari Saastamoinen
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Patent number: 5633300Abstract: A process for making paper to enhance the dry strength of the paper produced without substantially reducing its softness comprising adding to a bleached pulp furnish, separately or together, (1) an anionic polymer selected from the group consisting of carboxymethyl guar, carboxymethyl bean gum, carboxymethyl hydroxyethyl guar, and a carboxymethyl hydroxypropyl guar, with (2) a cationic polymer selected from the group consisting of a cationic guar, a cationic acrylamide copolymer, a cationic bean gum, a cationic amineepichlorohydrin wet strength resin, and both a cationic wet strength resin and at least one of the other said cationic polymers, a composition for adding to a paper-making pulp slurry comprising the said polymers, a method for making the said composition, and a paper product containing the said composition, are disclosed.Type: GrantFiled: June 7, 1995Date of Patent: May 27, 1997Assignee: Hercules IncorporatedInventor: Sunil P. Dasgupta
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Patent number: 5618861Abstract: This invention relates to a liquid composition for the control of pitch deposition in pulp and paper making comprising an aqueous solution of (1) a derivatized cationic guar, and (2) a nonionic polymer.Type: GrantFiled: May 1, 1995Date of Patent: April 8, 1997Assignee: Ashland Inc.Inventors: Linda M. Hlivka, George K. Wai
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Patent number: 5595630Abstract: A process for producing paper, utilizing a combination of anionic and cationic aluminum compound additives and providing superior freeness and diminished turbidity, is provided.Type: GrantFiled: August 31, 1995Date of Patent: January 21, 1997Assignee: E. I. Du Pont de Nemours and CompanyInventor: Robert H. Moffett
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Patent number: 5584966Abstract: An improved method of paper formation, utilizing a combination of polysilicate microgel, anionic and cationic polymers with the optional utilization of an aluminum salt, is provided.Type: GrantFiled: February 21, 1995Date of Patent: December 17, 1996Assignee: E. I. du Pont de Nemours and CompanyInventor: Robert H. Moffett
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Patent number: 5567234Abstract: Addition of xanthan gum to aqueous dispersions of colloidal silica containing non-skid compositions for improved spraying.Type: GrantFiled: December 20, 1995Date of Patent: October 22, 1996Assignee: H. B. Fuller Licensing & Financing, Inc.Inventors: Robert A. LaBrash, Stephen M. Willging
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Patent number: 5543459Abstract: Graft polymers are obtainable by free radical polymerization of(A) monomers or monomer mixtures of(a) from 10 to 100% by weight of open-chain N-vinylcarboxamides(b) from 0 to 90% by weight of other, carboxyl-free moneothylenically unsaturated monomers which are copolymerizable with the monomers (a) and(c) from 0 to 5% by weight of monomers containing two or more ethylenically unsaturated, non-conjugated double bonds in the molecule,in the presence of(B) natural substances containing saccharide structures, such as mono-, oligo- and polysaccharides,in a weight ratio (A):(B) of from 95:5 to 20:80 and, if required, subsequent hydrolysis of the amido groups of the polymerized monomers (a) of the graft polymer with formation of amino groups, and said polymers are used as dry and wet strength agents for paper, board and cardboard.Type: GrantFiled: March 9, 1995Date of Patent: August 6, 1996Assignee: BASF AktiengesellschaftInventors: Heinrich Hartmann, Walter Denzinger, Michael Kroener, Claudia Nilz, Friedrich Linhart, Andreas Stange
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Patent number: 5502091Abstract: A process for making paper to enhance the dry strength of the paper produced without substantially reducing its softness comprising adding to a bleached pulp furnish, separately or together, (1) an anionic polymer selected from the group consisting of carboxymethyl guar, carboxymethyl bean gum, carboxymethyl hydroxyethyl guar, and a carboxymethyl hydroxypropyl guar, with (2) a cationic polymer selected from the group consisting of a cationic guar, a cationic acrylamide copolymer, a cationic bean gum, a cationic amine-epichlorohydrin wet strength resin, and both a cationic wet strength resin and at least one of the other said cationic polymers, a composition for adding to a paper-making pulp slurry comprising the said polymers, a method for making the said composition, and a paper product containing the said composition, are disclosed.Type: GrantFiled: February 28, 1994Date of Patent: March 26, 1996Assignee: Hercules IncorporatedInventor: Sunil P. Dasgupta
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Patent number: 5489638Abstract: At least 20% of poly(vinyl alcohol) (PVA) is dispersed in an aqueous solution of at least one salt dissolved therein selected from the group of sodium or potassium formate, sodium, potassium, or magnesium sulfate, sodium or potassium citrate, sodium or potassium polyacrylate, or mixtures thereof. This aqueous suspension of PVA is useful in systems in which PVA is dissolved in order to reduce the time of dissolution.Type: GrantFiled: April 2, 1992Date of Patent: February 6, 1996Assignee: Aqualon CompanyInventor: Charles L. Burdick
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Patent number: 5487419Abstract: A process for the production of and a composition of redispersible mechanically disassembled cellulose and the resultant product, referred to as microdenominated cellulose (MDC). The process is characterized by drying the MDC in the presence of a dispersion agent. The product is characterized by a settled volume of greater than 50%, as determined on the basis of a 1% by weight suspension in water after twenty-four hours, and a water retention value of over 350%. MDC is useful as an ingredient in foods, pharmaceutical and cosmetic products.Type: GrantFiled: July 9, 1993Date of Patent: January 30, 1996Assignee: Microcell, Inc.Inventor: Michael K. Weibel
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Patent number: 5470435Abstract: An improved method for the production of water soluble polyaluminosilicate microgels, formed by the reaction of solutions of alkali metal silicates with solutions of acids containing dissolved aluminum compounds, is provided.Type: GrantFiled: November 23, 1994Date of Patent: November 28, 1995Assignee: E. I. du Pont de Nemours and CompanyInventors: John D. Rushmere, Robert H. Moffett
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Patent number: 5464472Abstract: The present invention relates to a fine aqueous dispersion of an organophilic sheet silicate, consisting essentially of a sheet silicate capable of cation exchange and a quaternary organic onium salt reacted therewith, which dispersion comprises from 3 to 30% by weight, based on the organophilic sheet silicate, of a water-soluble, natural polymer and/or a derivative thereof.Type: GrantFiled: June 24, 1994Date of Patent: November 7, 1995Assignee: Hoechst AktiengesellschaftInventors: Ute Horn, Guido Dessauer
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Patent number: 5415736Abstract: A sheet material, typically paper or cardboard, contains a natural, chemically untreated fibrous material and a secondary long-staple fiber material in a weight ratio comprised between (50-90):(10-50). It further contains fiber fines, at least one retention agent for these fines and at least one sheet strength improving agent. The sheet may be manufactured on paper making machines after preparing a mash from the components listed above and refining. The sheet material is intended to replace paper or cardboard normally made from chemically treated, expensive raw materials.Type: GrantFiled: February 5, 1993Date of Patent: May 16, 1995Inventor: Till Grether
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Patent number: 5338406Abstract: A polyelectrolyte complex comprising at least one water-soluble, linear, high molecular weight, low charge density cationic polymer having a reduced specific viscosity greater than 2 deciliters/gram (at 0.05 weight % in a 2M NaCl solution at 30.degree. C.) and a charge density of 0.2 to 4 milliequivalents/gram (meq/g), and at least one water-soluble, anionic polymer having a charge density less than 5 meq/g, an aqueous system comprising the polyelectrolyte complex, a composition comprising the polymers which form the polyelectrolyte complex, and paper comprising the polyelectrolyte complex. It is also directed to a process comprising (1) forming an aqueous suspension of cellulosic fibers; (2) adding a strengthening additive so that the aforementioned polyelectrolyte complex is incorporated into the aqueous suspension of cellulosic fibers; and (3) sheeting and drying the fibers to form the desired cellulosic web.Type: GrantFiled: September 10, 1992Date of Patent: August 16, 1994Assignee: Hercules IncorporatedInventor: Douglas C. Smith
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Patent number: 5338407Abstract: A process for making paper to enhance the dry strength of the paper produced without reducing its softness, that comprises adding to a bleached pulp furnish a mixture of an anionic carboxymethyl guar or a carboxymethyl hydroxyethyl guar with a cationic guar that may be prepared by reacting a natural guar with caustic and subsequently with quaternary ammonium chloride.Type: GrantFiled: December 23, 1991Date of Patent: August 16, 1994Assignee: Hercules IncorporatedInventor: Sunil P. Dasgupta
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Patent number: 5334287Abstract: Graft polymers are obtainable by free radical polymerization of(A) monomers or monomer mixtures of(a) from 10 to 100% by weight of open-chain N-vinylcarboxamides(b) from 0 to 90% by weight of other, carboxyl-free monoethylenically unsaturated monomers which are copolymerizable with the monomers (a) and(c) from 0 to 5% by weight of monomers containing two or more ethylenically unsaturated, non-conjugated double bonds in the molecule, in the presence of(B) natural substances containing saccharide structures, such as mono-, oligo- and polysaccharides,in a weight ratio (A):(B) of from 95:5 to 20:80 and, if required, subsequent hydrolysis of the amido groups of the polymerized monomers (a) of the graft polymer with formation of amino groups, and said polymers are used as dry and wet strength agents for paper, board and cardboard.Type: GrantFiled: July 17, 1992Date of Patent: August 2, 1994Assignee: BASF AktiengesellschaftInventors: Heinrich Hartmann, Walter Denzinger, Michael Kroener, Claudia Nilz, Friedrich Linhart, Andreas Stange
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Patent number: 5326631Abstract: An unsintered metal fiber burner is produced by mixing ceramic fibers with the metal fibers and binding the mixed metal-ceramic fibers together as a porous layer adherent to a foraminous support. By mixing ceramic fibers with metal fibers, the cost of a sintered metal fiber burner is reduced while the novel burner, because of the metal fiber therein, exhibits improved properties such as greater radiant efficiency, lower NO.sub.x emissions and increased durability.Type: GrantFiled: June 7, 1993Date of Patent: July 5, 1994Assignee: Alzeta CorporationInventors: Martin G. Carswell, Robert M. Kendall, John D. Sullivan
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Patent number: 5318669Abstract: A process for making paper to enhance the dry strength of the paper produced without substantially reducing its softness comprising adding to a bleached pulp furnish, separately or together, (1) an anionic polymer selected from the group consisting of carboxymethyl guar, carboxymethyl bean gum, carboxymethyl hydroxyethyl guar, and a carboxymethyl hydroxypropyl guar, with (2) a cationic polymer selected from the group consisting of a cationic guar, a cationic acrylamide copolymer, a cationic bean gum, a cationic amineepichlorohydrin wet strength resin, and both a cationic wet strength resin and at least one of the other said cationic polymers, a composition for adding to a paper-making pulp slurry comprising the said polymers, a method for making the said composition, and a paper product containing the said composition, are disclosed.Type: GrantFiled: August 14, 1992Date of Patent: June 7, 1994Assignee: Hercules IncorporatedInventor: Sunil P. Dasgupta
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Patent number: 5316623Abstract: A method for imparting wet strength to paper with improved water absorbency, that comprises adding to an aqueous suspension of cellulosic paper stock a neutral or alkaline-curing thermosetting wet-strength resin, a water-soluble polymer containing carboxyl groups or carboxylate ions as their alkali metal or ammonium salts, and a substantially non-thermosetting tertiary-amino polyamide-epichlorohydrin resin.Type: GrantFiled: December 9, 1991Date of Patent: May 31, 1994Assignee: Hercules IncorporatedInventor: Herbert H. Espy
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Patent number: 5292403Abstract: A method of inhibiting the deposition of organic contaminants in a pulp and papermaking system comprising adding to the system an effective amount of a detackifying composition comprising a charged polymer and an oppositely charged surfactant, with the proviso that at least the polymer or the surfactant be surface active.Type: GrantFiled: March 10, 1993Date of Patent: March 8, 1994Assignee: Betz PaperChem, Inc.Inventors: David D. Dreisbach, Mark E. Laurint
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Patent number: 5281306Abstract: A water-disintegrable cleaning sheet comprising a web of water-dispersible fibers having incorporated thereinto a water-soluble binder having a carboxyl group; at least one metallic ion selected from the group consisting of ions of alkaline earth metals, manganese, zinc, cobalt, and nickel; and an aqueous cleaning agent containing an organic solvent, is disclosed. The sheet satisfies both water disintegrability and strength even when cotained a cleaning agent of high water content.Type: GrantFiled: April 2, 1992Date of Patent: January 25, 1994Assignee: Kao CorporationInventors: Shusuke Kakiuchi, Makoto Ishii, Atsuo Nakae, Seiko Ikoma
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Patent number: 5277764Abstract: Cellulose fibre containing products in sheet or web form, such as paper and pulp sheets, are produced from a suspension of cellulose containing fibres, and optional fillers, to which is added anionic inorganic particles, such as bentonite and silica based particles, and a cationic carbohydrate polymer containing aluminum. The cationic carbohydrate polymers are cationic galactomannans or cationic starch. High cationized starch with a degree of substitution of at least 0.07 are especially suitable.Type: GrantFiled: December 9, 1991Date of Patent: January 11, 1994Assignee: Eka Nobel ABInventors: Kjell Johansson, Hans E. Johansson, Stefan Klofver
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Patent number: 5250153Abstract: The manufacture of sag-resistant, lightweight structural mineral panels on a foraminous support wire is accomplished by forming a dilute aqueous dispersion of mineral fiber and/or aggregate and an anionically stabilized latex binder, coupling the binder solids onto the mineral fiber materials by adding a small amount of a flocculant such as a cationic polyacrylamide, and passing the slurry onto a first flooded section of the support wire to form an open, entangled, structural mass having water in interstitial spaces of the entangled mass. Water is stripped from the mass and the mass dried without collapse of the open structure by passing heated dry air through the open entangled structure.Type: GrantFiled: October 29, 1990Date of Patent: October 5, 1993Assignee: USG Interiors, Inc.Inventors: David G. Izard, Mark H. Englert
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Patent number: 5153317Abstract: A composition and its method of use are disclosed for controlling rheology of an aqueous dye, which composition comprises 1-30 parts of a gum selected from the group consisting of xanthan gum, rhamsan gum, welan gum and mixtures thereof and 70-99 parts of a water soluble polysaccharide having aliginate equivalent rheology, preferably an alginate. Also disclosed is a color imparting composition for fabric or carpet printing which comprises 99-99% of an aqueous dye component and 1-10% of the rheology control component. The polysaccharide is preferably an alginate, starch, cellulosic polymer or guar gum or mixtures thereof.Type: GrantFiled: November 15, 1991Date of Patent: October 6, 1992Assignee: Merck & Co., Inc.Inventors: Theresa M. Ortega, Philip E. Winston, Jr., Kenneth Clare
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Patent number: 5112445Abstract: Surface sizes comprising 1) gellan gum and 2) one or more film-forming polymers such as chemically modified starch, cellulose derivatives, and polyvinyl alcohol are described. The compositions exhibit enhanced film-forming properties.Type: GrantFiled: June 23, 1989Date of Patent: May 12, 1992Assignee: Merck & Co., Inc.Inventors: Philip E. Winston, Jr., Harold D. Dial, Kenneth Clare, Theresa M. Ortega
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Patent number: 5104487Abstract: The present invention is directed to a paper having improved properties, a process of producing the paper, and compositions used in the process of producing the paper. The invention generally comprises using a cationic starch in combination with a naturally anionic polysaccharide gum.Type: GrantFiled: August 16, 1990Date of Patent: April 14, 1992Assignee: Betz Paper Chem., Inc.Inventors: Thomas E. Taggart, Michael A. Schuster, Alan J. Schellhamer
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Patent number: 5082528Abstract: Iron salts hydrolyzable to ferric hydroxide are provided as retention agents for size in the production of paper and paperboard to aid in water repellence, reduce pollutants, and create other beneficial effects.Type: GrantFiled: December 7, 1990Date of Patent: January 21, 1992Assignee: Eaglebrook, Inc.Inventor: Neil A. Hartman
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Patent number: 5079348Abstract: A film forming composition useful as a paper size is described which includes 1-20 parts, preferably 2-15 parts, by weight of a gum selected from the group consisting of xanthan gum, rhamsan gum, welan gum and mixtures thereof; 3-20 parts, preferably 5-17 parts, by weight of a water soluble alginate; and 60-100 parts, preferably 70-90 parts, by weight of starch, polyvinyl alcohol or carboxymethylcellulose, with the gum:alginate ratio being not greater than 1:1, preferably not greater than 1:2. The balance of the composition will primarily be water. Additives such as sodium hexametaphosphate may also be present.Type: GrantFiled: May 24, 1989Date of Patent: January 7, 1992Assignee: Merck & Co., Inc.Inventors: Kenneth Clare, Philip E. Winston, Jr., Harold D. Dial, Theresa M. Ortega
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Patent number: 5004791Abstract: Disclosed are a polysaccharide derivative having the structure: ##STR1## and a polysaccharide graft polymer having the structure: Sacch--O--(G).sub.m --(M)--.sub.n, wherein Sacch- is a polysaccharide; m is zero or one; G is the residue of a polymerizable, unsaturated monomer which is bonded to the polysaccharide in an ether or ester linkage; n is greater than one; M is the residue of one or more polymerizable, unsaturated, monomer(s), at least one of which is a siloxane-containing monomer, which have been grafted to the polysaccharide by free radical polymerization; R is an organic group which is bonded to the polysaccharide by an ether or ester linkage and to the silicon by a carbon-silicon linkage; R.sub.1 is a straight or branched C.sub.1 -C.sub.6 alkyl or alkenyl group, or an aryl, aralkyl or alkaryl group; and R.sub.2 and R.sub.3 are, independently, straight or branched C.sub.1 -C.sub.6 alkyl or alkenyl groups, or aryl, aralkyl or alkaryl groups, or alkoxides of straight or branched C.sub.1 -C.sub.Type: GrantFiled: September 10, 1990Date of Patent: April 2, 1991Assignee: National Starch and Chemical Investment Holding CorporationInventor: Robert L. Billmers
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Patent number: 4973680Abstract: Disclosed are a polysaccharide derivative having the structure: ##STR1## and a polysaccharide graft polymer having the structure: Sacch-O-(G).sub.m -(M)-.sub.n, wherein Sacch- is a polysaccharide; m is zero or one; G is the residue of a polymerizable, unsaturated monomer which is bonded to the polysaccharide in an ether or ester linkage; n is greater than one; M is the residue of one or more polymerizable, unsaturated, monomer(s), at least one of which is a siloxane-containing monomer, which have been grafted to the polysaccharide by free radical polymerization; R is an organic group which is bonded to the polysaccharide by an ether or ester linkage and to the silicon by a carbon-silicon linkage; R.sub.1 is a straight or branched C.sub.1 -C.sub.6 alkyl or alkenyl group, or an aryl, aralkyl or alkaryl group; and R.sub.2 and R.sub.3 are, independently, straight or branched C.sub.1 -C.sub.6 alkyl or alkenyl groups, or aryl, aralkyl or alkaryl groups, or alkoxides of straight or branched C.sub.1 -C.sub.Type: GrantFiled: March 3, 1989Date of Patent: November 27, 1990Assignee: National Starch and Chemical Investment Holding CorporationInventor: Robert L. Billmers
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Patent number: 4961825Abstract: In the production of paper or pulp sheets from a paper stock, a binder is added which comprises cationic and anionic components to improve the paper characteristics and the stock characteristics, such that increased retention and a more readily dewatered stock are obtained.The anionic component consists of colloidal anionic particles having at least one surface layer of aluminum silicate or aluminum-modified silicic acid, such that the surface groups of the particles contain silicium and aluminum atoms in a ratio of from 9.5:0.5 to 7.5:2.5.The cationic component consists of cationic carbohydrate having a degree of substitution of 0.01-1.0.Type: GrantFiled: September 22, 1989Date of Patent: October 9, 1990Assignee: Eka Nobel ABInventors: Kjell R. Andersson, Bernt Larsson, Hans-Olof Thoresson, Bo V. Larsson