公开(公告)号：US20150209732A1

公开(公告)日：2015-07-30

申请号：US14681209

申请日：2015-04-08

申请人： KURARAY CO., LTD. ,  YAMAGUCHI UNIVERSITY

发明人： Takahiro NAKASHIMA ,  Atsushi JIKIHARA ,  Takashi WAKUI ,  Mitsuru HIGA

IPC分类号： B01D61/42 ,  C02F1/469

CPC分类号： B01D61/422 ,  B01D69/02 ,  B01D71/38 ,  B01D71/80 ,  B01D71/82 ,  B01D2325/42 ,  B01J39/19 ,  C02F1/4693 ,  C08F293/00 ,  C08F297/00 ,  C08J5/2231 ,  C08J2329/04 ,  C08J2353/00

摘要： Provided is a cation exchange membrane having a stable ion exchange performance during usage, being excellent in basic properties such as membrane resistance and ion transportation as well as strength, and useful for electrodialysis and a method for producing the same. The cation exchange membrane is composed of a polyvinyl alcohol copolymer including an anionic group-containing anionic polymer segment and a vinyl alcohol polymer segment, and having a microphase separation structure having a domain size (X) in a range from 0 nm

摘要翻译： 本发明提供一种阳离子交换膜，其在使用中具有稳定的离子交换性能，具有优异的基本性能如膜电阻和离子迁移以及强度，并且可用于电渗析及其制备方法。 阳离子交换膜由包含阴离子性基团的阴离子聚合物链段和乙烯醇聚合物链段的聚乙烯醇共聚物构成，并且具有范围（X）为0nm×XlnE的150nm的微相分离结构 nm。 该方法由聚乙烯醇共聚物形成膜，其被调节为含盐量，其盐重量（C）相对于聚乙烯醇共聚物重量（P）为[（C）/（P）]为 4.5 / 95.5或更低。

公开(公告)号：US20150291452A1

公开(公告)日：2015-10-15

申请号：US14747032

申请日：2015-06-23

申请人： KURARAY CO., LTD. ,  YAMAGUCHI UNIVERSITY

发明人： Atsushi JIKIHARA ,  Kenichi KOBAYASHI ,  Takahiro NAKASHIMA ,  Mitsuru HIGA

IPC分类号： C02F1/469

CPC分类号： C02F1/4693 ,  B01D61/422 ,  B01D67/0006 ,  B01D69/10 ,  B01D71/38 ,  B01D71/80 ,  B01D2323/30 ,  B01D2325/42 ,  C02F2201/46 ,  C08J5/2231 ,  C08J2329/04

摘要： Provided is an ion exchange membrane including an ionic vinyl alcohol polymer having a cation exchange group or an anion exchange group. The ion exchange membrane 1 includes a porous support 3 and the ionic vinyl alcohol polymer. The porous support is provided, in a thickness direction from one surface thereof, with an impregnated layer 2 at least a part of which is impregnated with the ionic vinyl alcohol polymer. The ionic vinyl alcohol polymer includes an ionic vinyl alcohol polymer having an ion exchange group selected from a cation exchange group or an anion exchange group. The ion exchange membrane has a zeta potential value (ζ1) at one surface and a zeta potential value (ζ2) at the other surface, which are represented by the formula (1). (|ζ1|)−|ζ2|)/|ζ1|

摘要翻译： 提供了包含具有阳离子交换基团或阴离子交换基团的离子型乙烯醇聚合物的离子交换膜。 离子交换膜1包括多孔载体3和离子性乙烯醇聚合物。 多孔载体在其一个表面的厚度方向上设置浸渍层2，浸渍层2的至少一部分用离子型乙烯醇聚合物浸渍。 离子型乙烯醇聚合物包括具有选自阳离子交换基团或阴离子交换基团的离子交换基团的离子型乙烯醇聚合物。 离子交换膜在一个表面具有ζ电位值（ζ1），另一面的ζ电位值（ζ2）由式（1）表示。 （|ζ1|） - |ζ2|）/ |ζ1| <0.5（|ζ1|）≧|ζ2|）（1）

公开(公告)号：US20240209128A1

公开(公告)日：2024-06-27

申请号：US18288570

申请日：2022-04-25

申请人： Kuraray Co., Ltd.

发明人： Misuzu FUJIMORI ,  Yuta TAOKA ,  Atsushi JIKIHARA

IPC分类号： C08F18/08 ,  C08J3/12 ,  C08L31/04 ,  C09D131/04 ,  C09J131/04 ,  D21H19/12 ,  D21J1/08

CPC分类号： C08F18/08 ,  C08J3/12 ,  C08L31/04 ,  C09D131/04 ,  C09J131/04 ,  D21H19/12 ,  D21J1/08 ,  C08J2331/04 ,  C08L2201/52

摘要： A vinyl alcohol polymer including a structural unit derived from at least one selected from the group consisting of: a monomer having a carboxy group; and a derivative of the monomer, wherein the vinyl alcohol polymer has a minimum degree of branching of 0.93 or less within a range of an absolute molecular weight being 200,000 or more and 800,000 or less, and an insoluble content of a mixture prepared by adding 4 parts by mass of the vinyl alcohol polymer to 96 parts by mass of water followed by stirring at 60° C. for 1 hour is 0.1 ppm or more and less than 2,000 ppm.