公开(公告)号：US20160369030A1

公开(公告)日：2016-12-22

申请号：US15121558

申请日：2015-02-27

申请人： KEMIRA OYJ

发明人： Sacha LEGRAND ,  Marco POLVERARI ,  Rosa CARCELLER

IPC分类号： C08F293/00 ,  C02F1/52 ,  D21H21/10 ,  C02F11/14 ,  C08F8/12 ,  D21H17/37

CPC分类号： C08F293/00 ,  C02F1/5272 ,  C02F1/56 ,  C02F11/14 ,  C08F8/12 ,  C08F226/02 ,  C08F295/00 ,  D21H17/34 ,  D21H17/37 ,  D21H17/375 ,  D21H21/06 ,  D21H21/10

摘要： New polyvinylamide and/or acryl acid-based copolymers. The new structured block copolymers are based on the block copolymerization of N-vinyl formamide (NVF) with other monomers by using a bifunctional initiator. Further, a method of preparing the structured block copolymer is provided, and especially a method wherein the NVF-based block is at least partially hydrolyzed to obtain PVAm. Also the use of the new structured block copolymers in sludge dewatering and in papermaking processes is disclosed.

摘要翻译： 新的聚乙烯酰胺和/或丙烯酸基共聚物。 新的结构嵌段共聚物是基于N-乙烯基甲酰胺（NVF）与其它单体通过使用双功能引发剂的嵌段共聚合而成的。 此外，提供了制备结构化嵌段共聚物的方法，特别是其中将基于NVF的嵌段至少部分水解以获得PVAm的方法。 还公开了在污泥脱水和造纸工艺中使用新的结构嵌段共聚物。

公开(公告)号：US20220306510A1

公开(公告)日：2022-09-29

申请号：US17619444

申请日：2019-06-24

申请人： KEMIRA OYJ

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

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

摘要： 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：US20190276578A1

公开(公告)日：2019-09-12

申请号：US16462560

申请日：2017-12-15

申请人： Kemira Oyj

发明人： Matti HIETANIEMI ,  Rosa CARCELLER ,  Asko KARPPI ,  Joonas LIKANDER

IPC分类号： C08F265/10 ,  C08F220/56 ,  D21H17/37 ,  D21H17/45 ,  D21H21/10

摘要： 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：US20180194906A1

公开(公告)日：2018-07-12

申请号：US15739751

申请日：2016-05-11

申请人： Kemira Oyj

发明人： Rosa CARCELLER ,  Matti HIETANIEMI ,  Sacha LEGRAND ,  Mari ZABIHIAN

IPC分类号： C08J3/24 ,  C08F20/56 ,  C08F26/02 ,  C08F271/00 ,  D21H21/10 ,  D21H17/45

CPC分类号： C08J3/246 ,  C08F20/56 ,  C08F26/02 ,  C08F271/00 ,  C08L33/02 ,  C08L33/26 ,  C08L39/02 ,  C08L2205/04 ,  D21H17/33 ,  D21H17/37 ,  D21H17/375 ,  D21H17/45 ,  D21H17/54 ,  D21H21/10 ,  D21H21/18 ,  C08F220/56 ,  C08F220/06

摘要： The present invention relates to an interpenetrating polymer network (IPN) material comprising a copolymer of vinylamine-vinylformamide, and a homo-polymer or a copolymer of at least one monomer selected from acrylamide or derivatives thereof, acrylic acid or derivatives thereof, or a mixture thereof forming the IPN material together with the copolymer of vinylamine-vinyl-formamide. The present invention further relates to a process for producing the IPN material, and to use of the IPN material in paper industry.