KEMIRA OYJ Patent applications |
Patent application number | Title | Published |
20160060147 | SCALE-INHIBITING POLYMERS AND METHODS FOR PREVENTING SCALE FORMATION - Scale-inhibiting polymers, compositions comprising the scale-inhibiting polymers and methods for preventing scale formation in circulating fluid are provided. The scale-inhibiting polymers comprise two or more recurring monomers wherein in at least one recurring monomer is an allyl-sulfonate-containing monomer, and at least one recurring monomer is a styrene-sulfonate-containing monomer. The polymers, compositions and methods may be used in industrial processes including metal extraction from mineral ores. | 03-03-2016 |
20160024375 | Friction Reducing Polymers - Described herein are friction reducing polymers comprising two or more recurring units wherein at least one recurring unit is an acrylic acid or acrylamide monomer and at least one recurring unit is a vinyl monomer selected from a vinyl alcohol, a vinyl ester, and a vinyl ether. | 01-28-2016 |
20150351383 | Biocide composition and method for treating water - The present invention provides a biocide composition comprising a biocide and a carrier, wherein the biocide is soluble in the carrier. The carrier may comprise polyethylene glycol ester. The present invention also provides a method for controlling biofilms by eliminating and/or preventing microorganisms in an aqueous environment. | 12-10-2015 |
20150246834 | Method and system for control of an addition rate of a hexavalent chromium control chemical to water - The invention describes a method and system for controlling the addition rate of a contaminant control chemical to a water or wastewater line. The level of hexavalent chromium as a contaminant in the water or wastewater is measured using a spectro-photometric probe placed in the line. Data representative of the level of measured hexavalent chromium content is read into a computing unit, which determines a required contaminant control chemical addition rate based on said level of hexavalent chromium content. The contaminant control chemical is then added at the required addition rate to reduce the amount of hexavalent chromium to a predetermined level. | 09-03-2015 |
20150238650 | ABSORBENT MATERIALS, PRODUCTS INCLUDING ABSORBENT MATERIALS, COMPOSITIONS, AND METHODS OF MAKING ABSORBENT MATERIALS - In various exemplary embodiments described herein, an absorbent structure (e.g., a paper material) having an applied absorbent material (e.g., an absorbent film) may be formed by treating a fiber (e.g., a cellulosic fiber) with an applied absorbent material forming system (also referred to as a “film forming system”), absorbent materials, compositions, methods of making absorbent materials, and the like. | 08-27-2015 |
20150144282 | METHOD FOR INCREASING PAPER STRENGTH - The present invention provides a method for increasing paper strength in papermaking process comprising adding to a pulp a composition comprising an anionic polyacrylamide (APAM) and a high charge cationic glyoxylated polyacrylamide (GPAM). The present invention also provides paper obtained with said method. | 05-28-2015 |
20150114094 | Method and system for analyzing solid matter containing liquids and monitoring or controlling processes containing such liquids - The invention concerns a method and system for analyzing a liquid sample containing solid matter. The method comprises fractionating the sample according to particle sizes and/or masses of the solid matter so as to produce sample fractions, and measuring at least one physical or chemical property of at least one of said sample fractions. According to the invention the sample is conducted to a disintegration channel having one or more depressions, and a liquid flow having a non-constant temporal velocity profile is applied through the disintegration channel, in order to gradually take solid matter of the sample with the liquid flow from said one or more depressions for providing said sample fractions. The invention allows for efficient fractionation of samples, which cannot be fractionated using conventional field flow fractionation, for example. | 04-30-2015 |
20140360691 | METHOD FOR PRODUCING PAPER, BOARD OR THE LIKE AND AGGLOMERATE - The invention relates to a method for producing paper, board or the like. In the method is obtained an aqueous filler dispersion, comprising particles of at least one first filler, the filler dispersion having a floc size distribution with original mean chord length value. The particles of the first mineral filler are brought into a contact with a cationic pre-treatment agent, which is capable of initiating flocculation of the filler particles in the dispersion, whereby a pre-treated filler dispersion comprising flocs, which comprise first mineral particles, is formed. The pre-treated filler dispersion is combined ed with a stock of fibres. The floc size distribution of the filler dispersion is changed with the pre-treatment agent, which is a natural and/or synthetic polymer, so that the mean chord length value increases at least with 2% from the original mean chord length value. The invention relates also to an agglomerate comprising at least one first mineral filler particle, a plurality of second mineral filler particles attached to at least one first filler particle by a pre-treatment agent, which is a natural and/or synthetic polymer. The average particle size by weight of the first mineral filler particles is 1.5-4.0 μm, the average particle size by weight of the second mineral filler particles is 0.5-2.4 μm, provided that the second mineral filler particles are smaller than the first mineral filler particles, and the mean chord length of the agglomerate is <40 μm. | 12-11-2014 |
20140343872 | Method and device for monitoring and controlling the state of a process stream - The present invention concerns a method of estimating and optionally controlling the microbiological state in a process stream of an industrial process by measuring the concentration of dissolved oxygen or the rH value, or both, in said stream, the method including continuous or periodic sampling and online measurement. The invention also concerns a device suitable for use in implementing said method. | 11-20-2014 |
20140303045 | Biocidal Systems and Methods of Use - Systems and methods for controlling microbial growth and/or activity in a gas field fluid or oil field fluid are provided, comprising: a) adding a first biocide component to the gas field fluid or oil field fluid in an amount effective to control microbial growth and/or activity; and b) after a delay, adding a second biocide component to the gas field fluid or oil field fluid. | 10-09-2014 |
20140293040 | DEVICE AND METHOD FOR CHARACTERIZING SOLID MATTER PRESENT IN LIQUIDS - The present invention relates to a device, system and method to measure tackiness of a substance, such as pulp, with an on-line or an in-line sensor having a transparent plate with a surface where tacky particles can attach. Attached particles are identified by a camera behind the plate. The camera is focused to detect stationary particles attached to the surface. Measurement is performed directly from a process stream or from a sidesteam and the plate does not need to be removed from the process for the measurement. The plate material may be plastic, such as polycarbonate or acrylic. Additionally, the flow speed may be kept be low, e.g. <0.1 m/s at the measurement position, and/or there may be a stagnation point of flow at or near measurement where the flow speed approaches zero. | 10-02-2014 |
20140090845 | Defoaming Compositions - Cement compositions and processes for reducing air entrainment in a cement composition generally include mixing a hydraulic cement with a defoamer compositions including one or more organic acid ester polymers selected from an organic acid ester of polyethylene oxide polymer, an organic acid ester of polypropylene oxide polymer, and a mixture thereof. The compositions may further comprise an organic acid ester of an ethylene oxide-propylene oxide block copolymer. | 04-03-2014 |
20130245158 | METHODS OF MEASURING A CHARACTERISTIC OF A CREPING ADHESIVE FILM AND METHODS OF MODIFYING THE CREPING ADHESIVE FILM - Described herein are quartz crystal microbalance (QCM) and quartz crystal microbalance with dissipation (QCMD) techniques that can be used for measuring characteristics of a creping adhesive film similar to the creping adhesive film that is formed on a Yankee dryer during the tissue and towel manufacturing process. In addition, exemplary embodiments described herein may use these techniques to predict performance of creping aids utilized to form a creping adhesive film. | 09-19-2013 |
20130220939 | Method of Controlling Addition Rate of an Odor Control Chemical - The invention concerns a method of controlling addition rate of an odor control chemical to a wastewater line comprising means for adding odor control chemical to the wastewater. The method comprises measuring a level of dissolved sulfides in the wastewater line using a sulfide probe placed in said wastewater line, transferring data on the level of dissolved sulfides to a computing unit, determining a required odor control chemical addition rate in said computing unit based on said level of dissolved sulfides, and instructing the means for adding odor control chemical to add the odor control chemical at said required addition rate. The invention allows for accurate on-line control of the level of H | 08-29-2013 |
20130220922 | METHOD AND SYSTEM FOR MONITORING PROPERTIES OF AN AQUEOUS STREAM - The invention concerns an online method and system for monitoring properties of an aqueous stream of an industrial process. The method comprises providing an initial aqueous stream originating from said process, the aqueous stream containing solid matter exhibiting a first settling behavior; adding modifying agent to the initial aqueous stream at an addition rate sufficient to provide a modified aqueous stream containing solid matter exhibiting a second settling behavior different from the first settling behavior; conducting a sample of the initial aqueous stream or modified aqueous stream, any combination stream comprising the modified aqueous stream or any substream of the modified aqueous stream batchwise from a sampling point to a settling vessel having a volume; and measuring the settling behavior of the solid matter in the sample locally in the settling vessel as a function of time. The invention can be used for efficient monitoring and, optionally, controlling the degree of agglomeration of pulp and paper or board manufacturing processes. | 08-29-2013 |
20130213593 | Polyamine Polyamidoamine Epihaloohydrin Compositions and Processes for Preparing and Using the Same - Compositions of and processes for preparing a polyamine-polyamidoamine-epihalohydrin resin generally include reacting a first polyamine, a polyamidoamine, and an epihalohydrin to form the polyamine-polyamidoamine-epihalohydrin (PPAE) resin, wherein the polyamidoamine is prepared by reacting a polycarboxylic acid or a polycarboxylic acid derivative with a second polyamine to form the polyamidoamine, wherein a molar ratio of the polyamine to the polycarboxylic acid is 1.05 to 2.0. The PPAE resin can be used in an adhesive formulation for use in creping applications for forming paper products such as tissue products. | 08-22-2013 |
20130204035 | PROCESS FOR THE PREPARATION OF A MIXTURE OF CHELATING AGENTS - The present invention relates to a process for the preparation of a mixture of aspartic acid diethoxy succinate and an amino acid derivative of the general formula (I) wherein n is 1-10, m is 0 or 1, and R is hydrogen or an alkali metal or alkaline earth metal ion, comprising reacting maleate with diethanol amine under alkaline conditions in the presence of a lanthanoid catalyst to form aspartic acid diethoxy succinate followed by adding aspartic acid which reacts with unreacted maleate to form imino disuccinic acid, i.e. an amino acid derivative of formula (I) wherein m is 0, or by adding a diamine derivative of the general formula (II) NH2(CH2)nNH2 wherein n is as defined above, which reacts with unreacted maleate to form an amino acid derivative of formula (I) wherein m is 1 and n is as defined above. | 08-08-2013 |
20130184407 | METHOD FOR CONTROLLING SIZE DISTRIBUTION OF POLYMER PARTICLES DURING PREPARATION OF AQUEOUS POLYMER DISPERSION AND AQUEOUS POLYMER DISPERSION - The present disclosure relates to a method for controlling size distribution of formed polymer particles during preparation of aqueous polymer dispersion. The method comprises obtaining an aqueous polysaccharide solution, which comprises about 10 to 40 weight-% polysaccharide containing a free hydroxyl group, such as starch, and polymerising in the polysaccharide solution in the presence of a graft-linking, water-soluble redox system about 30 to 60 weight-% of at least one optionally substituted styrene, about 60 to 30 weight-% of at least one C1-C4-alkyl (meth)acrylate, and 0 to about 10 weight-% of other ethylenically unsaturated copolymerizable monomers. The size distribution of the formed polymer particles is controlled by adjusting viscosity of the polysaccharide solution before the polymerisation to a level less than about 20 mPas. The present disclosure relates also to an aqueous polymer dispersion having the D(99) value less than about 160 nm for polymer particles in the polymer dispersion and its use. | 07-18-2013 |
20130164814 | CONTROL OF ENZYMES IN THE PRODUCTION OF PULP - A method and use therein for inactivating hydrogen peroxide decomposing enzymes in the production of recycled fiber pulp and/or mechanical pulp comprising providing solid peroxygen to an aqueous process for fiber production. | 06-27-2013 |
20130160959 | COMPOSITIONS AND METHODS OF MAKING PAPER PRODUCTS - Paper strength systems including polyamine-polyamidoamine-epihalohydrin (PPAE) resin are disclosed. Also disclosed are methods of forming a paper including applying a strength system comprising PPAE to cellulosic fiber, as well as the resultant paper. | 06-27-2013 |
20130153510 | METHOD AND SYSTEM FOR TREATING AQUEOUS STREAMS - The invention relates to a method and system for treating an aqueous stream having a first flow rate and containing solid matter exhibiting first settling properties, the method comprising adding a modifying agent to the aqueous stream at an addition rate sufficient to change the first settling properties of the aqueous stream to obtain a modified aqueous stream having solid matter exhibiting second settling properties different from the first settling properties; taking batchwise samples of the modified aqueous stream to a settling vessel having a volume; determining a settling property of the solid matter of the samples in the settling vessel; and conducting the modified aqueous stream to a separation unit in which solid matter is separated from the modified aqueous stream. The invention provides a convenient way of monitoring and/or controlling aqueous streams conducted for example to purification processes. | 06-20-2013 |
20130081771 | PAPER AND METHODS OF MAKING PAPER - Exemplary embodiments of the present disclosure include paper, methods of making paper, and the like. | 04-04-2013 |
20130081211 | ENVIRONMENTALLY FRIENDLY TANNING COMPOSITION - An embodiment of the present disclosure relates to a composition suitable for leather tanning comprising zeolite treated with monocarboxylic acid and to a method for manufacturing said composition. An embodiment of the present disclosure method comprises providing zeolite into a reactor and keeping said zeolite in motion while introducing concentrated monocarboxylic acid thereto provided that the mean temperature of the resulting composition is 50° C. or below. | 04-04-2013 |
20130037230 | POLYMERIC COMPOSITIONS AND THEIR PRODUCTION AND USES - The present invention relates to a composition comprising dispersion, having an aqueous phase containing a dissolved water soluble cationic coagulant polymer and if needed a dissolved inorganic salt. The aqueous phase further contains a dispersed water soluble flocculant polymer, wherein the water soluble flocculant polymer is formed of a water soluble ethylenically unsaturated monomer or monomer blend which are polymerized in the aqueous phase. The water soluble cationic coagulant polymer is cationic poly(alkyleneamine), which is the reaction product of the following reaction: H | 02-14-2013 |
20120255698 | Method and Composition for Improved Temporary Wet Strength - A new process to make high solids polymer backbone with low molecular weight and narrow molecular weight distribution has been developed by a continuous polymerization processes under refluxing conditions. In this process, a mixture of acrylamide monomer, chain transfer agent and initiator is simultaneously and continuously added to the heel of aqueous solution under refluxing conditions. | 10-11-2012 |
20120247697 | Polyamine Polyamidoamine Epihaloohydrin Compositions and Processes for Preparing and Using the Same - Compositions of and processes for preparing a polyamine-polyamidoamine-epihalohydrin resin generally include reacting a first polyamine, a polyamidoamine, and an epihalohydrin to form the polyamine-polyamidoamine-epihalohydrin (PPAE) resin, wherein the polyamidoamine is prepared by reacting a polycarboxylic acid or a polycarboxylic acid derivative with a second polyamine to form the polyamidoamine, wherein a molar ratio of the polyamine to the polycarboxylic acid is 1.05 to 2.0. The PPAE resin can be used in an adhesive formulation for use in creping applications for forming paper products such as tissue products. | 10-04-2012 |
20120244063 | PROCESS FOR THE PRODUCTION OF CHLORINE DIOXIDE - Disclosed is a process for the production of chlorine dioxide, by which sulphuric acid can be efficiently mixed into the reaction mixture. The process apparatus includes a reaction vessel ( | 09-27-2012 |
20120220692 | DEFOAMING COMPOSITIONS AND PROCESSES FOR CEMENTING APPLICATIONS - Cement compositions and processes for reducing air entrainment in a cement composition generally include mixing a hydraulic cement with a defoamer composition including an organic acid ester of a polyoxyethylene-polyoxypropylene block copolymer. | 08-30-2012 |
20120160774 | DETERGENT BUILDERS - A detergent builder composition includes a (co)polymer of acrylic acid. The acrylic acid copolymers may be selected from a copolymer of acrylic acid and 2-acrylamido-2-methyl propane sulfonic acid, and a copolymer of acrylic acid and hydroxyethyl methacrylate. Also disclosed are processes for removing calcium and/or magnesium ions with the detergent builder composition. | 06-28-2012 |
20120118523 | Composition and Process for Increasing the Dry Strength of a Paper Product - A dry strength additive composition generally includes an anionic and/or amphoteric polyacrylamide having a molecular weight of less than 1,000,000 Daltons, wherein the amphoteric polyacrylamide has a net negative charge; a cationic and/or amphoteric starch; and a cationic non-starch polymer having a charge density greater than 1 milliequivalent per gram (meq/g) at a pH of 3. The components defining the composition can be added to a pulp suspension sequentially or as a pre-blended mixture. | 05-17-2012 |
20120080157 | DEGRADING AGENT COMPOSITIONS FOR TEMPORARY WET STRENGTH SYSTEMS IN TISSUE PRODUCTS - A degrading agent composition for use in manufacturing a tissue product generally includes a degrading agent, a degradation inhibiting carrier, and a non-ionic surfactant. The non-ionic surfactant stabilizes the viscosity of the composition as a function of time. The degrading agent composition can be used in combination with a temporary wet strength agent to produce a tissue product exhibiting high initial wet tensile strength and desirable decay properties. Processes for forming the tissue product and pumpable fluids containing the degrading agent composition are also disclosed. | 04-05-2012 |
20120035306 | ANIONIC FUNCTIONAL PROMOTER AND CHARGE CONTROL AGENT WITH IMPROVED WET TO DRY TENSILE STRENGTH RATIO - The invention relates to a composition comprising (a) a functional promoter comprising a water-soluble anionic polymer having a molecular weight of at least about 50,000 daltons and a molecular weight charge index value of at least about 10,000; (b) a cationic surfactant component; such that when the composition treats a fibrous substrate, in conjunction with a cationic strength agent, the treated fibrous substrate exhibits (i) a ratio of wet tensile strength to dry tensile strength ranging from about 1:5 to about 1:2 and (ii) an increase in a ratio of wet tensile strength to dry tensile strength of at least about 10%, as compared to when the fibrous substrate is treated with the functional promoter and without a surfactant. The invention also relates to a paper product made with such a system, and method for imparting wet strength to a paper product with the functional promoter. | 02-09-2012 |
20110263836 | METHOD FOR REDUCTION OF LIGHT-INDUCED YELLOWING OF LIGNIN-CONTAINING MATERIAL - A method for treating lignin-containing fibrous material to reduce its susceptibility to yellowing generally includes enzymatically stabilizing the lignin of the material with an oxidizing agent capable of oxidizing phenolic or similar groups, which may undergo reactions conductive to the formation of colored sites on the fibers, and treating the material with a fluorescent whitening agent. Also disclosed are lignin-containing materials obtained by the method. | 10-27-2011 |
20110236572 | POLYMER COMPOSITION - A dry coating binder includes a polymer which includes at least 80% by weight of main monomers. The main monomers are selected from C | 09-29-2011 |
20110224348 | PROCESS FOR PREPARING A COATING COMPOSITION FOR PAPER AND BOARD - A process for preparing a dry coating composition for paper and board includes mixing at least one pigment and at least one binder and pulverizing the obtained mixture, and wherein 25% to 100% of the pigment has particle size D | 09-15-2011 |
20110203485 | BLEACHING METHOD - Methods for treating lignocellulosic material or pigment with a reductive bleaching solution generally include washing the lignocellulosic material or pigment with a reducing agent of magnesium dithionite. The method includes at least one reductive stage and at least one peroxide stage. Also disclosed are methods for preparing dithionite solution wherein magnesium bisulfite is reduced with borohydride solution to obtain dithionite. Bleached lignocellulosic material or pigment obtained with the treatment methods are also disclosed. | 08-25-2011 |
20110201748 | CATIONIC POLYMERS CONTAINING 2-HYDROXYALKYL-(METH)ACRYLATES AS PROMOTERS FOR ASA SIZING - The invention relates to polymers useful as a papermaking additives. The invention also relates to methods for making and using such additives. | 08-18-2011 |
20110139388 | CATIONIC STARCH GRAFT COPOLYMERS AND NOVEL PROCESS FOR THE PREPARATION OF CATIONIC STARCH GRAFT COPOLYMERS - A cationic starch graft copolymer is prepared by polymerization of monomers a) to d)
| 06-16-2011 |
20110137051 | PROCESS FOR RECOVERY OF FORMIC ACID - The invention relates to a process for the recovery of concentrated high purity formic acid having a concentration of at least 50%, most preferably at least 95%, from biomass wherein an aqueous liquid mixture containing levulinic acid and possibly furfural is subjected to a liquid-liquid extraction step, followed by the recovery of furfural, formic acid and levulinic acid. | 06-09-2011 |
20110098490 | PROCESS FOR PREPARATION OF FORMATE SALT - Processes for the recovery of formate salt from biomass and the product obtained thereof generally include subjecting an aqueous liquid mixture containing levulinic acid, formic acid and possibly furfural to a liquid-liquid extraction process, followed by the recovery of the furfural, the formate salt and the levulinic acid or the levulinate salt. | 04-28-2011 |
20110044883 | METHOD OF PURIFYING GYPSUM - A method of purifying flue gas desulfurization (FGD) gypsum. The method includes the steps of a) providing an aqueous slurry containing said FGD gypsum, b) passing the aqueous slurry to a magnetic separator, and c) contacting the FGD gypsum to be purified with a solution containing an acid and having pH below 5 in an acid washing step. Also, a purified FGD gypsum obtained by the inventive method and the use thereof as coating or filler pigment for paper or board. | 02-24-2011 |
20100307706 | REDUCED SHEAR CELLULOSE REACTIVE SIZING AGENT FOR WET END APPLICATIONS - The invention relates to a method for sizing a paper product that involves the steps of (a) providing a paper stock system; (b) forming, in the absence of high shearing forces, an aqueous sizing emulsion comprising an alkenylsuccinic anhydride component; (c) submitting the emulsion formed from step b to a post-dilution step in the presence of a cationic component under conditions, in the absence of high shearing forces, that produce a post-diluted emulsion having improved sizing efficacy; (d) adding the post-diluted emulsion to the paper stock; and (e) forming a paper web. | 12-09-2010 |
20100297460 | COMPOSITION AND METHOD FOR TREATING WOOD - According to the invention, wood material is treated with a composition comprising at least one C1-C7 monocarboxylic acid or a salt, or mixtures thereof, and at least one chelating agent. These compounds are dissolved in a liquid aqueous vehicle. In this manner, the treated wood is endowed with excellent resistance against detrimental environmental effects. | 11-25-2010 |
20100216934 | GRAFT POLYMER LATEX AND METHOD OF PREPARING - Method of grafting an anionic organic polymer to an organic polymer in latex form, which method comprises forming a water-based mixture of (1) a latex of an organic polymer, (2) an anionic organic polymer, and (3) a free radical initiator, and effecting grafting between said latex polymer and said anionic organic polymer characterized in that the anionic organic polymer is (i) an anionic homopolymer or anionic random copolymer wherein at least 50 mole % of the repeating units are repeating units that bear at least one acid group or acid salt group or (ii) a graft or block copolymer comprising a segment consisting of a anionic homopolymer or anionic random copolymer as defined in (i), and aqueous dispersion comprising graft polymer particles. | 08-26-2010 |
20100200499 | METHOD FOR ENZYMATIC TREATMENT OF SLUDGE IN WATER PURIFICATION - The present invention relates to a method for treatment of sludge in water purification, the method comprising the steps: providing an enzyme mixture comprising at least one enzyme capable of digesting natural polymeric materials; and adding the enzyme mixture and at least one chelating reagent, in optional order or simultaneously, to an aqueous sludge suspension. | 08-12-2010 |
20100137514 | CATIONIC STARCH GRAFT COPOLYMERS AND NOVEL PROCESS FOR THE PREPARATION OF CATIONIC STARCH GRAFT COPOLYMERS - A cationic starch graft copolymer is prepared by polymerization of monomers a) to d)
| 06-03-2010 |
20100108277 | PAPER PRODUCTION WITH MODIFIED SILICA GELS AS MICROPARTICLES - Use of silica sols containing sulfonic acid groups and/or mercapto groups as microparticles in paper production, in particular for paper retention. | 05-06-2010 |
20090221704 | PROCESS FOR THE PREPARATION OF PEROXY ACIDS - The present invention relates to a process for the preparation of a solution comprising a first peroxy acid comprising performic acid and a second peroxy acid, said process comprising forming a carboxylic acid solution comprising a first carboxylic acid comprising formic acid, a second carboxylic acid and hydrogen peroxide, wherein the amount of formic acid is from 0.5 to 20% by weight of the amount of the second carboxylic acid, and allowing the components to react to form a solution comprising performic acid and said second peroxy acid, the amount of peroxy acids being at least 5% by weight. The invention also relates to a storable solution comprising performic acid and said second peroxy acid. The solution can be used as a disinfecting agent for controlling micro-organisms. | 09-03-2009 |
20090114357 | TEMPORARY WET STRENGTH SYSTEM FOR TISSUE PAPER - The invention relates to a composition comprising a (a) a temporary wet strength agent component capable of forming hemi-acetal bonds with the fibers of a tissue web to provide initial wet strength, subsequent rapid degradation of the initial wet strength when the tissue web contacts water; and (b) a sizing agent component capable of imparting water-repelling properties to the tissue web; such that the strength agent component and the sizing agent component are present in sufficient amounts so that when the composition is added to a tissue pulp slurry during a tissue-making process, tissue made from the tissue-making process exhibits a combination of (1) improved initial wet tensile, (ii) improved decay, and (iii) absorbency. | 05-07-2009 |
20090071618 | HIGH-PERFORMANCE STRENGTH RESINS IN PAPERMAKING INDUSTRIES - A composition comprising a functionalized water-soluble, cationic, thermosetting, cellulose reactive polymer with a doubly structured backbone that is the reaction product of: (a) a copolymerized (i) acrylamide component, (ii) cationic co-monomer component and (iii) at least one multifunctional crosslinking monomer component; and (b) a cellulose reactive agent component; such that the acrylamide component, the cationic co-monomer component, the multifunctional crosslinking monomer component, and the cellulose reactive agent component are in an amount sufficient amount to produce a polymer that imparts strength to a fibrous substrate when the polymer is added to paper stock during a papermaking process. The invention also relates to methods for making and using such a composition. | 03-19-2009 |
20090032015 | DEPOLYMERIZATION METHOD - The invention relates to a method for depolymerizing starch comprising mixing a starch material with an ionic liquid solvent to dissolve the starch, and then treating the dissolved starch by agitating at a temperature and for a period for time to effect depolymerization of the starch into desired depolymerization products. | 02-05-2009 |
20090014695 | Mineral Dispersants and Methods for Preparing Mineral Slurries Using the Same - A mineral slurry comprises mineral particles in an amount equal to or greater than about 60 percent by total weight of the slurry, wherein 85 percent of the mineral particles have an average particle size equal to or less than 2 micrometers; a polyelectrolyte dispersant derived from an acrylate polymer formed by reversible addition-fragmentation chain transfer polymerization, wherein the polyelectrolyte dispersant comprises endgroups comprising thio-containing residues derived from a trithiocarbonate chain transfer agent, wherein the polyelectrolyte dispersant is in an amount less than about 35 pounds of the dispersant per ton of dry mineral particles, and wherein the polyelectrolyte dispersant has a molecular weight of 3000 to 10,000 Daltons and a polydispersity of at least 1.0 and less than 1.5; and the remainder water. | 01-15-2009 |
20090010829 | Reducing Agent Composition - The invention relates to a reducing agent composition for use in the catalytic reduction process of nitrogen oxides in exhaust gases, the composition containing 20-40 w % of urea, 19-40 w % of ammonium formate, and water. | 01-08-2009 |