公开(公告)号：US20250002652A1

公开(公告)日：2025-01-02

申请号：US18703535

申请日：2022-10-28

Applicant: KEMIRA OYJ

Inventor： Perttu HEISKA ,  Xavier DE SEQUERA ,  Eric PADOVANI ,  Asko KARPPI

IPC: C08G73/02

Abstract: The invention relates to a process to modify polymers on-site the main process site. The process comprises on-site the main process site a receiving section (11) configured to receive an adduct solution as an interim polymer product for a process polymer of the main process site in solids contents of 15-60 wt-%, preferably 20-60 wt-%, more preferably 30-60 wt-%, a crosslinking section (13) configured to crosslink polymers of the adduct solution and a final section (14) configured to provide a ready-to-use solution with the crosslinked polymers to the main process as the process polymer on-site the main process site. The invention also relates to a method configured to modify polymers on-site at a main process site.

公开(公告)号：US20230159666A1

公开(公告)日：2023-05-25

申请号：US17429143

申请日：2020-02-06

Applicant: KEMIRA OYJ

Inventor： Asko KARPPI ,  Perttu HEISKA ,  Mika SUVANTO ,  Matti HIETANIEMI

IPC: C08B30/02 ,  C08B30/14 ,  D21H17/28 ,  B01F23/50 ,  B01F23/53 ,  B01F25/51

CPC classification number: C08B30/02 ,  C08B30/14 ,  D21H17/28 ,  B01F23/511 ,  B01F23/581 ,  B01F23/53 ,  B01F25/51 ,  B01F2101/47

Abstract: The present invention relates to a method and an arrangement for dissolving starch. Specifically, the present invention relates to a method for dissolving starch by introducing mechanical force to at least partially gelatinized agueous starch.

公开(公告)号：US20220089842A1

公开(公告)日：2022-03-24

申请号：US17429140

申请日：2020-02-06

Applicant: KEMIRA OYJ

Inventor： Asko KARPPI

IPC: C08L3/04 ,  D21H17/29 ,  D21H21/16 ,  D21H21/10 ,  D21H21/18

Abstract: The present invention relates to an aqueous composition of dissolved starch, use of it and compositions comprising the same. The composition has good handling properties and viscosity stability also in elevated starch concentrations.

公开(公告)号：US20230024255A1

公开(公告)日：2023-01-26

申请号：US17786181

申请日：2020-12-18

Applicant: Kemira Oyj

Inventor： Matti HIETANIEMI ,  Asko KARPPI

IPC: D21H17/45 ,  D21H21/18 ,  D21H21/10 ,  D21H17/28 ,  D21H11/14 ,  D21H11/02

Abstract: The invention relates to a composition for use in a manufacture of paper, board or the like. The composition comprises a mixture of cationic starch having amylopectin content of at least 85%, and an amphoteric polymeric structure comprising structural units originating from non-ionic monomers, preferably (meth)acrylamide, anionic groups and cationic groups, the polymeric structure comprising cationic groups at least 0.2 mol-%.

公开(公告)号：US20190218717A1

公开(公告)日：2019-07-18

申请号：US16317590

申请日：2017-09-04

Applicant: KEMIRA OYJ

Inventor： Matti HIETANIEMI ,  Jaakko EKMAN ,  Asko KARPPI ,  Kimmo STRENGELL

IPC: D21H17/37 ,  D21H17/45 ,  D21H17/14 ,  D21H17/42 ,  D21H21/10 ,  D21H21/36 ,  D21H23/18

Abstract: A method for manufacture of paper, board or the like, comprising the step of dissolving a composition into aqueous solution, whereby an aqueous treatment solution is obtained for adding the obtained treatment solution to the pulp. The composition comprising a copolymer of acrylamide and at least one cationic monomer, the copolymer comprising cationic monomers at least 15 mol-%, calculated from total amount of monomers, and an ionic crosslinker agent comprising at least two carboxyl groups, wherein the equivalent ratio of carboxyl groups:cationic monomer is between 1:20 and 1:0.5.

公开(公告)号：US20170145138A1

公开(公告)日：2017-05-25

申请号：US15300076

申请日：2015-04-10

Applicant: KEMIRA OYJ

Inventor： Asko KARPPI ,  Matti HIETANIEMI ,  Sacha LEGRAND

IPC: C08F293/00 ,  C02F11/14 ,  D21H21/10 ,  D21H21/18 ,  B01J41/14 ,  D21H17/37

CPC classification number: C08F293/005 ,  B01J41/14 ,  C02F1/56 ,  C02F11/14 ,  C08F4/04 ,  C08F4/36 ,  C08F2438/01 ,  D21H17/375 ,  D21H21/10 ,  D21H21/18

Abstract: The invention provides new water soluble polymers for the use in industrial processes, where large quantities of water is handled, such as sludge dewatering and papermaking. These new polymers are water soluble cross-linked block copolymers, wherein the block copolymers are cross-linked together using a cross-linking agent. Each of the block copolymers contain two different blocks, and these blocks are formed from different monomers. The blocks are linked together with a molecular spacer derived from a bifunctional initiator used during the polymerization of the blocks. The monomers used in polymerizing the blocks are different with each other and they are selected from a group consisting of N-vinylformamide, acrylic acid, acrylamide and water-soluble derivatives thereof.

公开(公告)号：US20220306510A1

公开(公告)日：2022-09-29

申请号：US17619444

申请日：2019-06-24

Applicant: KEMIRA OYJ

Inventor： Joonas LIKANDER ,  Rosa CARCELLER ,  Suhua WU ,  Asko KARPPI ,  Markus KORHONEN ,  Matti HIETANIEMI

IPC: C02F11/147 ,  C08F220/56 ,  C08F16/06

Abstract: A polymeric structure, which is obtained by polymerisation of (meth) acrylamide and at least one charged monomer in a polymerisation medium comprising at least a first host polymer, which first host polymer comprises polyvinyl alcohol. The polymeric structure may be used in making of paper, board, tissue or the like as a strength agent, or in dewatering of sludge.

公开(公告)号：US20210262169A1

公开(公告)日：2021-08-26

申请号：US17252295

申请日：2019-07-10

Applicant: Kemira Oyj

Inventor： Matti HIETANIEMI ,  Asko KARPPI ,  Jukka RAUTIAINEN

IPC: D21H11/08 ,  D21H11/14 ,  D21H17/29 ,  D21H17/37 ,  D21H17/55 ,  D21H27/00 ,  D21H27/10 ,  D21H27/30

Abstract: A method for manufacturing a multi-layered fibrous web is disclosed, which includes at least two fibrous layers, where each layer is formed from one or more fibre stocks. The fibrous layers are combined prior to subjecting the multilayered fibrous web to wet-pressing and drying. At least one layer of the multi-layered fibrous web is formed from a fibre stock including at least 50 weight-% of a chemi-thermomechanical pulp (CTMP), a hardwood kraft pulp and/or a recycled fibre material calculated from a thick stock applied to a particular layer approach system. A first strength component and a second strength component are added to the fibre stock. The first strength component includes a cationic strength agent and the second strength component includes a synthetic amphoteric polymer composition having a net charge from −3 to +1 meq/g (dry), at a pH of 7.

公开(公告)号：US20170284028A1

公开(公告)日：2017-10-05

申请号：US15508961

申请日：2015-09-04

Applicant: Kemira Oyj

Inventor： Matti HIETANIEMI ,  Jan-Luiken HEMMES ,  Vladimir GRIGORIEV ,  Asko KARPPI

IPC: D21H21/16 ,  D21H23/22 ,  D21H21/18 ,  D21H23/04 ,  D21H17/28 ,  D21H17/37

CPC classification number: D21H21/16 ,  D21H11/14 ,  D21H17/28 ,  D21H17/29 ,  D21H17/37 ,  D21H17/375 ,  D21H19/54 ,  D21H21/18 ,  D21H23/04 ,  D21H23/22

Abstract: The invention relates to a composition for sizing of a surface of paper, board or the like and its use for increasing strength properties of paper, board or the like. The composition has a solids content of 3-30%, and it comprises degraded non-ion is starch, and at least 0.5 weight-% of anionic polyacrylamide, which has a molecular weight, MW, >500 000 g/mol and

公开(公告)号：US20240360253A1

公开(公告)日：2024-10-31

申请号：US18688022

申请日：2022-09-21

Applicant: KEMIRA OYJ

Inventor： Asko KARPPI ,  Matti HIETANIEMI ,  Giorgio VANZETTI ,  Jonas KONN ,  Tomi KEMPAS

IPC: C08F8/28 ,  D21H17/45 ,  D21H21/18

CPC classification number: C08F8/28 ,  D21H17/455 ,  D21H21/18 ,  C08F2810/10

Abstract: Method for on-site glyoxylation of polyacrylamide in paper mill, board mill or the like is disclosed. Discontinuous batch glyoxylation reaction of aqueous reaction mixture is performed. The method comprises forming or obtaining the aqueous reaction mixture having a start viscosity and comprising polyacrylamide base polymer having weight average molecular weight of 30 000-300 000 g/mol and glyoxal. Concentration of the polyacrylamide base polymer in the reaction mixture is 1.5-8% above a Critical Concentration of the polyacrylamide base polymer. A feed of an alkali is added to the reaction mixture while measuring viscosity of the reaction mixture and/or a process variable related to the viscosity of the reaction mixture and the on-site glyoxylation reaction of polyacrylamide base polymer in the reaction mixture is allowed to proceed. When a predetermined end viscosity value is attained the feed of alkali is ended and acid is added to the reaction mixture.