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公开(公告)号：US20240360261A1
公开(公告)日：2024-10-31
申请号：US18768010
申请日：2024-07-10
IPC分类号： C08F220/60 , C08F8/28 , D21H17/45 , D21H21/20
CPC分类号： C08F220/60 , C08F8/28 , D21H17/455 , D21H21/20
摘要： An aqueous composition includes water and a cationic polymeric resin having at least one reactive aldehyde group and formed from the reaction of glyoxal and a polymer. The polymer comprises at least one acrylamide repeating unit and at least one cationic repeating unit wherein a number of reactive aldehyde equivalents divided by a number of equivalents of residual glyoxal based on the total weight of the polymer is greater than about 1.2, wherein prior to reaction the polymer has greater than about 50 mole % acrylamide repeat units and from about 2 to about 30 mole % cationic repeating units, wherein greater than about 5 mole % of the acrylamide repeating units are converted to reactive aldehyde groups in the cationic polymer resin; and wherein the composition exhibits a viscosity gain of less than about 200%.
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公开(公告)号：US12053964B2
公开(公告)日：2024-08-06
申请号：US17256060
申请日：2019-06-25
申请人： Stora Enso OYJ
发明人： Seppo Lampainen , Frank Peng , Atso Laakso , Ari-Pekka Määttänen
IPC分类号： B32B29/00 , B32B7/12 , B32B29/08 , B65D65/40 , D21H11/02 , D21H11/10 , D21H11/18 , D21H17/00 , D21H17/28 , D21H17/45 , D21H17/68 , D21H21/18 , D21H27/10 , D21H27/40
CPC分类号： B32B29/005 , B32B7/12 , B32B29/08 , B65D65/403 , D21H11/02 , D21H11/10 , D21H11/18 , D21H17/28 , D21H17/45 , D21H17/68 , D21H17/74 , D21H21/18 , D21H27/10 , D21H27/40 , B32B2250/03 , B32B2250/26 , B32B2307/546 , B32B2307/718 , B32B2307/72 , B32B2553/00
摘要： The invention relates to a ply of a linerboard for corrugated board, which ply exhibits high strength properties and which enables the production of lightweight linerboards. The ply of the invention comprises 20-80 wt % CTMP from wood fibers and 80-20 wt % chemical pulp, calculated on the total fiber weight of said ply and strength additives chosen from the group of microfibrillated cellulose (MFC), anionic or cationic polymers and starch or combinations thereof. The ply exhibits a geometric SCT index of above 22 Nm/g and a density of below 680 kg/m3, preferably of below 650 kg/m3.
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3.发明公开公开(公告)号：US20240218603A1
公开(公告)日：2024-07-04
申请号：US18335331
申请日：2023-06-15
发明人： James E. Sealey, II , Kevin P. Brennan , Justin S. Pence , Richard James Riehle , Daniel Mark Henn
摘要： A method of making paper and paperboard products, including absorbent structures, is disclosed. The method includes mixing ultra-high molecular weight (“UHMW”) glyoxalated polyvinylamide (“GPVM”) adducts and high molecular weight (“HMW”) anionic polyacrylamide (“APAM”) with the furnish during stock preparation of a wet laid papermaking process. High wet strength paper and paperboard products are also disclosed.
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公开(公告)号：US20240034822A1
公开(公告)日：2024-02-01
申请号：US18349309
申请日：2023-07-10
申请人： SNF Group
发明人： Cédrick FAVERO , Johann KIEFFER , Nicolas BOISSE , Jing LING
IPC分类号： C08F220/58 , C08L33/26 , C02F1/52 , D21H17/45
CPC分类号： C08F220/585 , C08L33/26 , C02F1/5272 , D21H17/455
摘要： Provided is a polymer composition containing a water-soluble cationic copolymer P2 structured in micro-blocks obtained by radical polymerization of at least one non-ionic monomer and at least one cationic monomer, in the presence of a homopolymer P1 having an average molecular weight between 5,000 and 100,000 daltons, the homopolymer P1 having been prepared from 2-acrylamido-2-methylpropane sulphonate in salified form and in the presence of 200 to 20,000 ppm by weight of 2-methyl-2-propenyl-sulphonic acid in salified form. Related methods are also provided.
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公开(公告)号：US20230212821A1
公开(公告)日：2023-07-06
申请号：US17928721
申请日：2021-06-14
申请人： KEMIRA OYJ
发明人： Leif ROBERTSEN , Jonas KONN
CPC分类号： D21H21/02 , D21C9/086 , D21C9/142 , D21H11/04 , D21H17/375 , D21H17/455
摘要： The invention relates to a method for pitch control and/or removal during bleaching of cellulosic fibres. Cellulosic fibres are obtained from a pulping process and formed into an aqueous cellulosic fibre suspension, and bleaching of the cellulosic fibre suspension is performed in a bleaching process comprising at least one acidic stage, where pH of the cellulosic fibre suspension is
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公开(公告)号：US20220213308A1
公开(公告)日：2022-07-07
申请号：US17646896
申请日：2022-01-04
摘要： An aqueous composition includes water and a cationic polymeric resin having at least one reactive aldehyde group and formed from the reaction of glyoxal and a polymer. The polymer comprises at least one acrylamide repeating unit and at least one cationic repeating unit wherein a number of reactive aldehyde equivalents divided by a number of equivalents of residual glyoxal based on the total weight of the polymer is greater than about 1.2, wherein prior to reaction the polymer has greater than about 50 mole % acrylamide repeat units and from about 2 to about 30 mole % cationic repeating units, wherein greater than about 5 mole % of the acrylamide repeating units are converted to reactive aldehyde groups in the cationic polymer resin; and wherein the composition exhibits a viscosity gain of less than about 200%.
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公开(公告)号：US20220033540A1
公开(公告)日：2022-02-03
申请号：US17276247
申请日：2019-09-13
IPC分类号： C08F8/12 , C08F220/18 , C08F220/58 , C08F226/02 , D21H17/45 , C08F220/06
摘要： Methods for producing final polymer A are provided that comprise the following steps: (A) providing a starting polymer V, the starting polymer V being obtainable by radical polymerization of the monomers (i), (ii), (iii), and (iv) as described herein in the amounts provided herein; and (B) hydrolyzing the provided starting polymer V under alkaline conditions to obtain the final polymer A, wherein the N—C(═O)R1 groups of formula (I) at least partially hydrolyze the monomers (i) polymerized into the starting polymer V to form primary amino groups. Certain final polymers A obtained are useful for a method for producing paper or cardboard comprising adding certain final polymers A to a first aqueous pulp suspension, dewatering the obtained second aqueous pulp suspension containing certain final polymers A on a water-permeable substrate to a wet paper structure, and further dewatering of the wet paper structure into a paper or cardboard.
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公开(公告)号：US20220018065A1
公开(公告)日：2022-01-20
申请号：US17297781
申请日：2019-11-15
发明人： Paul KROCHAK , Klas JOHANSSON , Fredrik BERTHOLD , Eric JOHANSSON SALAZAR-SANDOVAL , Erika TÖNNERFORS , Frédéric POUYET
摘要： The present invention relates to a method of producing holocellulose fibres by treating a wood-based raw material with an organic peroxide, wherein the method comprises charging the organic peroxide continuously to the wood-based raw material during the treatment and/or charging the organic peroxide to the wood-based raw material in at least two separate steps with an intermediate alkaline treatment step. Additionally, a process for the production of paper comprising the steps of preparing a papermaking stock comprising an aqueous pulp slurry comprising cellulosic fibres and having a fibre consistency of from 0.1 to 40% by weight, wherein the cellulosic fibres comprise or consist of holocellulose fibres, and wherein the amount of the wood-based holocellulose fibres is from 0.5 to 100% by weight, based on the total weight of the stock; providing the stock to a wire and form a web; dewatering the web; and drying the web is claimed. By the method affordable way to produce holocellulose fibres usable in the process to provide paper with high strength is provided, while effective dewatering can be obtained during the manufacturing process.
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公开(公告)号：US11203838B2
公开(公告)日：2021-12-21
申请号：US16754838
申请日：2018-10-01
IPC分类号： D21H23/04 , D21H17/45 , C08F218/00 , D21H21/18
摘要： A method for the production of paper or cardboard is provide comprising the following steps: (A) Adding a water soluble polymer P to a first aqueous pulp suspension, wherein polymer P is obtainable by Polymerizing to a polymer V of (i) 33 to 83 mol % of a monomer of formula I in which R1═H or C1-C6 alkyl, (ii) 6 to 56 mol % of diallyl dimethyl ammonium chloride, diallyl diethyl ammonium chloride or a salt form of a monoethylenically unsaturated monomer, (iii) 11 to 61 mol % of a monoethylenically unsaturated carboxylic acid, sulfonic acid or phosphonic acid, or salt forms thereof, (iv) 0 to 50 mol % of one or more ethylenically unsaturated monomers, and hydrolyzing the N—C(═O)R1 groups to form primary amino or amidine groups, (B) dehydrating the second aqueous pulp suspension to a wet paper structure, (C) dehydrating the wet paper structure.
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公开(公告)号：US20210079143A1
公开(公告)日：2021-03-18
申请号：US16983685
申请日：2020-08-03
申请人： ECOLAB USA INC.
发明人： Gary S. Furman , En-Wei Lin , Mei Liu , David J. Castro , Christopher D. Kaley
IPC分类号： C08F220/58 , D21H21/18 , D21H17/45
摘要： Strengthening resins and processes for making and using same. In some embodiments, a resin mixture can include a solvent and a strengthening resin. The strengthening resin can include one or more hydrophobic monomers incorporated therein. The strengthening resin can have a chemical formula of (I). The chemical formula (I) can include: where each R2 can be derived from a hydrophobic monomer.
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