Class / Patent application number | Description | Number of patent applications / Date published |
162164500 | Sulfur containing | 14 |
20080264590 | COMPOSITION FOR INCREASING CELLULOSIC PRODUCT STRENGTH AND METHOD OF INCREASING CELLULOSIC PRODUCT STRENGTH - A composition includes water; at least one hydrophilic polymer containing at least two groups which are independently the same or different a primary amine group or a secondary amine group and at least one saccharide containing a reducible function as described above. The hydrophilic polymer and the saccharide are mixed to form a reaction mixture and reacted to increase the viscosity of the reaction mixture. The reaction is then substantially terminated by reducing the pH of the composition. | 10-30-2008 |
20090050282 | PROCESS FOR THE MANUFACTURE OF PAPER AND BOARD, CORRESPONDING NOVEL RETENTION AND DRAINAGE AIDS, AND PAPER AND BOARD THUS OBTAINED - A process for the manufacture of paper, board or similar products, comprises
| 02-26-2009 |
20090188639 | USE OF WATER-SOLUBLE POLYMER COMPLEXES IN AQUEOUS SYSTEMS - A water-soluble interjacent complex that includes a first water-soluble polymer and one or more water-soluble monomers polymerized to form a second water-soluble polymer in the presence of the first water-soluble polymer. The water-soluble interjacent complex forms a solution in water that is free of insoluble polymer particles. The interjacent complexes may be used to treat a waste sludge by adding an effective amount thereof to the waste sludge. The interjacent complexes may also be used in making paper by adding an effective amount thereof to a pulp or a forming sheet at a suitable location on a paper making machine. The interjacent complexes may further be used as a rheology modifier in aqueous systems by adding an effective amount thereof to an aqueous medium to effect a desired viscosity, rheology, or flow curve property. | 07-30-2009 |
20090308553 | Method for Treating Mineral Materials Using Amphoteric Polymers, Mineral Materials Thereby Obtained, and their Usage as an Agent for Reducing the Quantity of Colloids in Manufacturing Paper - The invention firstly discloses a new method for treating mineral materials, by means of an amphoteric polymer, to make said mineral materials effective as an agent for reducing the quantity of natural and organic colloids in the process of manufacturing a sheet of paper. | 12-17-2009 |
20100071863 | COPOLYMER BLEND COMPOSITIONS FOR USE TO INCREASE PAPER FILLER CONTENT - Methods for making a heterogeneous polymer blend comprising one or more anionic polymers, one or more cationic polymers, and one or more non-ionic polymers, which method comprises (a) adding to a non-neutral solution a first amount of polymerization initiator and one or more anionic or cationic monomers, wherein each monomer has the same charge; (b) adding a second amount of the polymerization initiator and one or more non-ionic monomers; (c) adding a third amount of the polymerization initiator and one or more ionic monomers that are oppositely charged from the monomers of (a); adding stepwise, a fourth amount of the polymerization initiator to react any residual monomer, and (e) neutralizing the resulting polymer blend. Also claimed are heterogeneous polymer blends containing polymers formed from one or more anionic, cationic, and non-ionic monomers, either polymerized in situ or separately and then combined. Also claimed are methods for increasing the filler content of paper or paperboard, which methods comprises (a) combining the heterogeneous polymer blend with a precipitated calcium carbonate filler; (b) combining the resulting mixture with a pulp slurry; and (c) processing the resulting slurry mixture to form a sheet of paper or paperboard. Finally, also claimed are methods of increasing the filler content of paper or paperboard, which method comprises (1) combining either the heterogeneous blend or the precipitated calcium carbonate filler with a pulp slurry, (2) combining the remaining component with the pulp slurry; and (c) processing the resulting pulp slurry mixture to form a sheet of paper or paperboard. | 03-25-2010 |
20100108279 | METHOD FOR PRODUCING PAPER, PAPERBOARD AND CARDBOARD HAVING HIGH DRY STRENGTH - Process for the production of paper, board and cardboard having high dry strength by separate addition of a polymer comprising vinylamine units and of ligninsulfonic acid and/or a ligninsulfonate to a paper stock, draining of the paper stock and drying of the paper products. | 05-06-2010 |
20110048659 | PROCESS OF MAKING A WET FORMED CELLULOSIC PRODUCT AND A WET FORMED CELLULOSIC PRODUCT - According to the disclosure, a process of making a wet formed cellulosic product and a wet formed cellulosic product are disclosed. The process includes providing a slurry, forming the slurry into a cellulosic product, dewatering the cellulosic product, drying the cellulosic product, and applying an additive to one or more of the slurry and the cellulosic product. The additive modifies one or more of bulk, charge, potential, cumulative pore volume, surface tension of the cellulosic product. | 03-03-2011 |
20110048660 | PROCESS FOR THE PRODUCTION OF PAPER, BOARD AND CARDBOARD HAVING HIGH DRY STRENGTH - Process for the production of paper, board and cardboard having high dry strength by separate addition of a water-soluble cationic polymer and of an aqueous dispersion of a water-insoluble polymer having a content of acid groups of not more than 10 mol % or of an aqueous dispersion of a nonionic polymer, which dispersion has been made anionic, to a paper stock, draining of the paper stock and drying of the paper products. Preferably, the polymers are added to a paper stock which has a temperature of at least 40° C. | 03-03-2011 |
20110079365 | PRODUCTION OF PAPER - The use of water-soluble, amphoteric copolymers which are obtainable by copolymerization of
| 04-07-2011 |
20120073773 | METHOD FOR INCREASING THE DRY STRENGTH OF PAPER, PAPERBOARD, AND CARDBOARD - Process for the production of paper, board and cardboard having high dry strength by addition of
| 03-29-2012 |
20120325420 | PRODUCTION OF PAPER, CARD AND BOARD - The invention relates to a process for the production of paper, card and board, including the steps of draining a filler-containing paper stock, having a certain fibrous concentration and containing at least one water-soluble amphoteric copolymer, with sheet formation in a wire section, then pressing the paper in a press section, diluting the paper stock to a fibrous concentration in the range from 5 to 15 g/l, draining the diluted paper stock to form a sheet, and then pressing the sheet in the press section to a solids content G(x) wt % or greater, such that G(x) computes according to: | 12-27-2012 |
20130306261 | METHOD TO INCREASE DEWATERING, SHEET WET WEB STRENGTH AND WET STRENGTH IN PAPERMAKING - The invention provides a method of improving dewatering efficiency, increasing sheet wet web strength, increasing sheet wet strength and enhancing filler retention in a papermaking process. The method improves the efficiency of dewatering aid by coating at least some of the filler particles with a material that prevents the filler materials form adhering to dewatering aids. The dewatering aid holds the paper fibers together tightly and is not wasted on the filler particles. | 11-21-2013 |
20130340964 | ANIONIC LIPOPHILIC GLYCEROL-BASED POLYMERS FOR ORGANIC DEPOSITION CONTROL IN PAPERMAKING PROCESSES - The invention is directed to methods and compositions for reducing the deposition of pitches and stickies in a papermaking process. The method involves introducing an anionic glycerol-based polymer to the papermaking process. This anionic polymer prevents the pitches and stickies from depositing and agglomerating in papermaking processes. | 12-26-2013 |
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 |