公开(公告)号：EP2802611A1

公开(公告)日：2014-11-19

申请号：EP13701675.4

申请日：2013-01-11

申请人： Kemira OYJ

发明人： PEURANEN, Helena ,  HEISKA, Perttu ,  HUHTALA, Kimmo ,  BRUUN, Nina

IPC分类号： C08F251/00 ,  C08F220/18 ,  C08F212/08 ,  D21H21/16

CPC分类号： C08F251/00 ,  C08F2/16 ,  C08F2/20 ,  C08F212/08 ,  C08F220/18 ,  C08K3/20 ,  D21H17/24 ,  D21H17/36 ,  D21H17/37 ,  D21H21/16 ,  C08F2220/1825

摘要： The invention relates to a method for controlling size distribution of formed polymer particles during preparation of aqueous polymer dispersion. The method comprises obtaining a aqueous polysaccharide solution, which comprises 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 30 to 60 weight-% of at least one optionally substituted styrene, 60 to 30 weight-% of at least one C1-C4-alkyl (meth)acrylate, and 0 to 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

公开(公告)号：EP4423173A1

公开(公告)日：2024-09-04

申请号：EP22814130.5

申请日：2022-10-28

申请人： Kemira OYJ

发明人： HEISKA, Perttu ,  DE SEQUERA, Xavier ,  PADOVANI, Eric ,  KARPPI, Asko

IPC分类号： C08G73/02 ,  D21H17/55 ,  D21H21/20 ,  D21H23/00

CPC分类号： D21H21/20 ,  D21H17/55 ,  C08G73/0286 ,  D21H21/18

公开(公告)号：EP2534102A1

公开(公告)日：2012-12-19

申请号：EP11708511.8

申请日：2011-02-10

申请人： Kemira OYJ

发明人： TURKKI, Tarja ,  HEISKA, Perttu

IPC分类号： C01F11/46 ,  C09C1/02 ,  D21H17/66 ,  D21H17/69 ,  D21H17/70 ,  D21H19/38 ,  D21H19/42

CPC分类号： C01F11/46 ,  C01F11/18 ,  C01P2004/03 ,  C01P2004/61 ,  C01P2004/62 ,  C09C1/025 ,  D21C1/04 ,  D21C1/06 ,  D21H17/675 ,  D21H17/69 ,  D21H17/70 ,  D21H17/74 ,  D21H19/38 ,  D21H19/385 ,  D21H19/40 ,  D21H19/42 ,  D21H21/52

摘要： The invention relates to a process for the preparation of a pigment -cellulosic fibre composite, wherein the pigment comprises an inorganic pigment which comprises local cationic charges, said process comprises contacting an aqueous cellulosic fibre suspension and inorganic pigment particles such that crystals of said pigment are attached to the surface of the fibre, said crystals having a size of at most 5 µm. The produced composite product can be used as a filler pigment or coating pigment in the production of paper.

公开(公告)号：EP4423172A1

公开(公告)日：2024-09-04

申请号：EP22800725.8

申请日：2022-10-28

申请人： Kemira OYJ

发明人： KARPPI, Asko ,  TARAZONA, Judith ,  DE SEQUERA, Xavier ,  HEISKA, Perttu ,  PADOVANI, Eric

IPC分类号： C08G73/02 ,  D21H17/55 ,  D21H21/20

CPC分类号： C08G73/0286 ,  D21H21/20 ,  D21H21/18

公开(公告)号：EP2802611B1

公开(公告)日：2016-10-12

申请号：EP13701675.4

申请日：2013-01-11

申请人： Kemira OYJ

发明人： PEURANEN, Helena ,  HEISKA, Perttu ,  HUHTALA, Kimmo ,  BRUUN, Nina

IPC分类号： C08F251/00 ,  C08F220/18 ,  C08F212/08 ,  D21H21/16 ,  D21H17/37 ,  D21H17/36 ,  D21H17/24 ,  C08K3/20 ,  C08F2/20

CPC分类号： C08F251/00 ,  C08F2/16 ,  C08F2/20 ,  C08F212/08 ,  C08F220/18 ,  C08K3/20 ,  D21H17/24 ,  D21H17/36 ,  D21H17/37 ,  D21H21/16 ,  C08F2220/1825

公开(公告)号：EP2370528A1

公开(公告)日：2011-10-05

申请号：EP09796406.8

申请日：2009-12-18

申请人： Kemira OYJ

发明人： AARNI, Esko ,  HEISKA, Perttu ,  HUHTALA, Kimmo

IPC分类号： C09D7/02 ,  C09D17/00 ,  D21H19/58

CPC分类号： C09D17/004 ,  C08K2003/265 ,  C09D7/45 ,  C09D17/001 ,  D21H19/58

摘要： The invention relates to a method for improving rheological properties of an aqueous pigment slurry. In the method dispersion agent is added to an aqueous phase of a slurry comprising pigment particles or to the aqueous phase into which the pigment particles are to be added. The dispersion agent comprises styrene acrylate copolymer. The invention relates also to dispersion agent for a pigment slurry comprising a first component comprising styrene acrylate copolymer and a second component comprising a conventional dispersion agent, such as a straight-chain polyacrylate.

公开(公告)号：EP3921345A1

公开(公告)日：2021-12-15

申请号：EP20709637.1

申请日：2020-02-06

申请人： KEMIRA OYJ

发明人： KARPPI, Asko ,  HEISKA, Perttu ,  SUVANTO, Mika ,  HIETANIEMI, Matti

IPC分类号： C08B30/14 ,  C08L3/02 ,  D21H17/28

公开(公告)号：EP3824026A1

公开(公告)日：2021-05-26

申请号：EP19742742.0

申请日：2019-07-19

申请人： KEMIRA OYJ

发明人： AHOLA, Juhana ,  KARISALMI, Kaisa ,  RAMPOTAS, Christos ,  HEISKA, Perttu ,  SUVANTO, Mika

IPC分类号： C08L1/02 ,  D21H11/18 ,  D21H17/33 ,  D21H21/18 ,  C08H8/00

公开(公告)号：EP2370528B1

公开(公告)日：2018-08-22

申请号：EP09796406.8

申请日：2009-12-18

申请人： Kemira OYJ

发明人： AARNI, Esko ,  HEISKA, Perttu ,  HUHTALA, Kimmo

IPC分类号： C09D7/45 ,  C09D17/00 ,  D21H19/58

CPC分类号： C09D17/004 ,  C08K2003/265 ,  C09D7/45 ,  C09D17/001 ,  D21H19/58

摘要： The invention relates to a method for improving rheological properties of an aqueous pigment slurry. In the method dispersion agent is added to an aqueous phase of a slurry comprising pigment particles or to the aqueous phase into which the pigment particles are to be added. The dispersion agent comprises styrene acrylate copolymer. The invention also relates to a dispersion agent for a pigment slurry comprising a first component comprising styrene acrylate copolymer and a second component comprising a conventional dispersion agent, such as a straight-chain polyacrylate.

公开(公告)号：EP2279151A1

公开(公告)日：2011-02-02

申请号：EP09730312.7

申请日：2009-04-08

申请人： Kemira OYJ

发明人： HEISKA, Perttu

IPC分类号： C01F11/46 ,  B03C1/00

CPC分类号： B03C1/28 ,  B03C1/30 ,  B03C2201/18 ,  C01F11/468 ,  C01P2006/80

摘要： 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.