公开(公告)号：US10407831B2

公开(公告)日：2019-09-10

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 ,  D21H17/37 ,  D21H11/14 ,  D21H17/28 ,  D21H17/29 ,  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-ionic 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：US11518695B2

公开(公告)日：2022-12-06

申请号：US16607109

申请日：2018-05-15

Applicant: Kemira Oyj

Inventor： Asko Karppi ,  Matti Hietaniemi

IPC: D21H21/10 ,  C02F1/56 ,  C08J3/05 ,  D21H17/15 ,  D21H17/37 ,  C02F11/147 ,  C02F103/28

Abstract: A method for producing an aqueous copolymer solution, which comprises dissolving a copolymer of (meth)acrylamide and at least 1 mol-% cationic monomers, calculated from total amount of monomers in the dissolving water having calcium hardness of at least mg/l, expressed as Ca2+, and adding acid comprising monoprotic organic acid and/or mineral acid to the dissolving water and/or the aqueous solution of the copolymer in an amount sufficient to provide the aqueous solution of the copolymer with a pH of equal to or less than 4.5. The invention also relates to uses of the obtained polymer solutions in manufacturing of paper, board or the like or in treatment of sludge or water.

公开(公告)号：US20200377673A1

公开(公告)日：2020-12-03

申请号：US16607109

申请日：2018-05-15

Applicant: Kemira Oyj

Inventor： Asko Karppi ,  Matti Hietaniemi

IPC: C08J3/05 ,  D21H17/37 ,  D21H17/15 ,  D21H21/10 ,  C02F1/56 ,  C02F11/147

Abstract: A method for producing an aqueous copolymer solution, which comprises dissolving a copolymer of (meth)acrylamide and at least 1 mol-% cationic monomers, calculated from total amount of monomers in the dissolving water having calcium hardness of at least mg/l, expressed as Ca2+, and adding acid comprising monoprotic organic acid and/or mineral acid to the dissolving water and/or the aqueous solution of the copolymer in an amount sufficient to provide the aqueous solution of the copolymer with a pH of equal to or less than 4.5. The invention also relates to uses of the obtained polymer solutions in manufacturing of paper, board or the like or in treatment of sludge or water.

公开(公告)号：US10800869B2

公开(公告)日：2020-10-13

申请号：US16462560

申请日：2017-12-15

Applicant: Kemira Oyj

Inventor： Matti Hietaniemi ,  Rosa Carceller ,  Asko Karppi ,  Joonas Likander

IPC: C08F265/10 ,  C08F220/56 ,  D21H17/37 ,  D21H17/45 ,  D21H21/10 ,  D21H17/44 ,  D21H17/41

Abstract: A polymer composition includes a first host polymer, which is a copolymer of (meth)acrylamide and at least one cationic first monomer, and a second polymer, which is a copolymer of (meth)acrylamide and at least one cationic second monomer. The second polymer is polymerised in presence of the first host polymer, and the first host polymer has a higher cationicity than the second polymer, the difference in cationicity of the first host polymer and the second polymer being at least 3 mol-%, at least 5 mol-%, more preferably at least 7 mol-%. The polymer composition has a standard viscosity of >2.0 mPas, measured at 0.1 weight-% solids content in an aqueous NaCl solution (1 M), at 25° C., using Brookfield VII T viscometer with UL adapter. The invention relates also to uses of said polymer composition.

公开(公告)号：US20200291581A1

公开(公告)日：2020-09-17

申请号：US16759367

申请日：2018-10-31

Applicant: Kemira Oyj

Inventor： Timo Valkealaakso ,  Simo-Pekka Vanninen ,  Asko Karppi

IPC: D21H21/16 ,  D21H17/62 ,  D21H21/10 ,  D21H17/37 ,  D21H17/17 ,  D21H17/16

Abstract: A method for manufacturing paper or board is disclosed and further disclosed is an internal sizing system for providing improved retention of hydrophobic internal sizing agents. The internal sizing system includes a hydrophobic internal sizing agent as a first component selected from a group consisting of alkenyl succinic anhydride (ASA), alkyl ketene dimer (AKD), rosin sizes and any combination thereof, and a water-soluble polymer product including amphoteric polyacrylamide as a second component, which amphoteric polyacrylamide has neutral or cationic net charge at pH 7, a weight-average molecular weight of 700,000-18,000,000 g/mol and a total ionicity of 4-28 mol-%, where the first component and the second component are provided as separate components or as a combination of the first component and the second component.

公开(公告)号：US20190242065A1

公开(公告)日：2019-08-08

申请号：US16319362

申请日：2017-09-26

Applicant: Kemira Oyj

Inventor： Matti Hietaniemi ,  Asko Karppi ,  Mikko Virtanen

IPC: D21H21/18 ,  D21H17/29 ,  D21H17/43 ,  D21H17/00 ,  D21H23/10

CPC classification number: D21H21/18 ,  D21H17/29 ,  D21H17/375 ,  D21H17/43 ,  D21H17/71 ,  D21H17/72 ,  D21H21/10 ,  D21H23/10

Abstract: The invention relates to an aqueous dry strength composition suitable for use in manufacture of paper, board or the like. The composition includes a mixture of a synthetic polymer component, which is a copolymer of acrylamide and at least one anionic monomer, and a cationic starch component. The polymer component has an anionicity of 1-60 mol-%. The synthetic polymer component and cationic starch component provide the composition with a charge density in the range of 0.05-1 meq/g, when measured at pH 2.8, and 0.2-−3 meq/g, when measured at pH 7.0. The invention also relates to a method for making of paper, board or the like, where the dry strength composition is diluted with water, and the solution of the dry strength composition is added to the fibre stock before or after the addition of a cationic strength agent.

公开(公告)号：US20190024306A1

公开(公告)日：2019-01-24

申请号：US15755591

申请日：2016-08-26

Applicant: Kemira Oyj

Inventor： Matti Hietaniemi ,  Jaakko Ekman ,  Asko Karppi ,  Marko Kolari

IPC: D21C5/00 ,  D21C5/02 ,  D21H11/14 ,  D21H21/36

Abstract: The invention relates to a method for treating starch in pulp, paper and board making processes, in which processes recycled fibre material is used as raw material wherein the recycled fibre material is pulped in a pulper and obtaining a pulp flow comprising an aqueous phase and at least recycled fibres and starch dispersed in the aqueous phase. The method comprising the following steps: —adding amylase enzyme inhibitor and/or at least one biocide to pulp flow or to an aqueous process flow comprising starch for preventing starch degradation, and—adding an amphoteric polymer obtained by copolymerisation of (meth)acrylamide with cationic and anionic monomers to pulp flow or to an aqueous process flow comprising starch for binding starch to the fibres.

公开(公告)号：US20180016746A1

公开(公告)日：2018-01-18

申请号：US15546069

申请日：2016-01-26

Applicant: Kemira Oyj

Inventor： Asko Karppi ,  Matti Hietaniemi ,  Anneli Lepo ,  Kimmo Strengell

IPC: D21H17/45 ,  D21H21/18 ,  C08F220/56

Abstract: The invention relates to a water-soluble polymer product in particle form, comprising amphoteric polyacrylamide, which is obtained by gel polymerisation of acrylamide together with anionic and cationic monomers. The amphoteric polyacrylamide has a mass average molecular weight MW of 1500000-6000000 g/mol, and a total ionicity of 4-15 mol-%, whereby the polymer product has a polymer content of at least 60 weight-%. The invention relates also to uses of the polymer product in paper and board making.

公开(公告)号：US09809930B2

公开(公告)日：2017-11-07

申请号：US14442433

申请日：2013-11-13

Applicant: Kemira Oyj

Inventor： Asko Karppi ,  Matti Hietaniemi ,  Marco Polverari

IPC: D21H21/10 ,  D21H17/37 ,  D21H17/41 ,  C08L3/08 ,  D21H17/29 ,  D21H17/00 ,  D21H21/06 ,  C08B31/12 ,  D21H21/20

CPC classification number: D21H21/10 ,  C08B31/125 ,  C08L3/08 ,  D21H17/29 ,  D21H17/375 ,  D21H17/72 ,  D21H21/06 ,  D21H21/20

Abstract: The invention relates to a papermaking agent system in liquid form, which comprises (i) cationic starch solution, prepared by cooking a starch mixture comprising a starch component and a water component, and (ii) polymer composition, which has anionic and cationic groups and a cationic net charge of >0.1 meq/g. The polymer composition comprises or originates from at least one of constituents a), b) or c). Constituent a) contains an amphoteric polymer, which is a copolymer comprising structural units derived from acrylamide and/or methacrylamide monomers, and anionic and cationic groups attached to the copolymer. Constituent b) contains a first polymer, which is a copolymer comprising structural units derived from acrylamide and/or methacrylamide monomers, and anionic or cationic groups attached to the copolymer, as well as a second polymer, which comprises groups with opposite charge than the first polymer. Constituent c) contains a third polymer, which comprises a copolymer comprising structural units derived from acrylamide and/or methacrylamide monomers, as well as hydrolytically unstable cationic groups attached to the copolymer. Constituent a), b) or c) is added to one of the components of the starch mixture or to the starch mixture before the cooking of the starch mixture, and/or constituent a) or b) is added to the cationic starch solution after cooking of the starch mixture. The invention relates also to the use of the papermaking agent system and to a method for its preparation.

公开(公告)号：US09580865B2

公开(公告)日：2017-02-28

申请号：US14387369

申请日：2013-03-22

Applicant: KEMIRA OYJ

Inventor： Asko Karppi ,  Esko Tirronen

IPC: C08L79/02 ,  C08L3/00 ,  D21H17/29 ,  D21H17/45 ,  D21H17/54 ,  D21H21/10 ,  C08L3/08 ,  D21H17/37 ,  D21H17/44 ,  D21H17/55 ,  D21H17/56 ,  D21H21/06 ,  D21H21/18 ,  C08G73/02

CPC classification number: D21H17/29 ,  C08G73/022 ,  C08G73/0286 ,  C08G73/0293 ,  C08L3/08 ,  C08L79/02 ,  D21H17/375 ,  D21H17/44 ,  D21H17/45 ,  D21H17/455 ,  D21H17/54 ,  D21H17/55 ,  D21H17/56 ,  D21H21/06 ,  D21H21/10 ,  D21H21/18

Abstract: The invention relates to a method for dissolving cationic starch. In the method is obtained an aqueous polyelectrolyte solution comprising a synthetic cationic polymer, which has a charge density value of at least 0.1 meq/g, determined at pH3, the concentration of the cationic polymer in the polyelectrolyte solution being >2.5 weight-%, and the aqueous polyelectrolyte solution is brought together with cationic starch having a degree of substitution, DS, >0.1. The cationic starch is dissolved to the polyelectrolyte solution by heating and/or mixing. The invention relates also to a papermaking agent comprising 2-40 weight-% of synthetic cationic polymer which has a charge density value of at least 0.1 meq/g, determined at p H 3, and 2.5-25 weight-% cationic starch having degree of substitution, DS, >0.1. The papermaking agent is in slurry form and has a viscosity of 50-20 000 m Pas, measured at 25° C. with Brookfield DVI+ viscometer.

Abstract translation: 本发明涉及一种溶解阳离子淀粉的方法。 在该方法中，获得包含合成阳离子聚合物的水溶液聚电解质溶液，该聚合物的电荷密度值至少为0.1meq / g，在pH3下测定，阳离子聚合物在聚电解质溶液中的浓度> 2.5重量％ 并且将聚合电解质水溶液与具有取代度DS'> 0.1的阳离子淀粉一起使用。 通过加热和/或混合将阳离子淀粉溶解到聚电解质溶液中。 本发明还涉及一种造纸剂，其包含2-40重量％的合成阳离子聚合物，其电荷密度值至少为0.1meq / g，在p H 3和2.5-25重量％阳离子淀粉具有度 的替代，DS，> 0.1。 造纸剂为浆液形式，并且在25℃下用Brookfield DVI +粘度计测量粘度为50-20,000mPa·s。