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    ETHYLENE-VINYL ALCOHOL COPOLYMER PARTICLES, METHOD FOR PRODUCING SAME AND USE OF SAME
    11.
    发明申请
    ETHYLENE-VINYL ALCOHOL COPOLYMER PARTICLES, METHOD FOR PRODUCING SAME AND USE OF SAME 审中-公开

    公开(公告)号：US20200299435A1

    公开(公告)日：2020-09-24

    申请号：US16756243

    申请日：2018-10-16

    Applicant: KURARAY CO., LTD

    Inventor： Tatsuya TANIDA ,  Keisuke MORIKAWA ,  Masato NAKAMAE ,  Seisuke INADA

    IPC: C08F216/06 ,  C09D129/04

    Abstract: The present invention relates to ethylene-vinyl alcohol copolymer particles, comprising an ethylene-vinyl alcohol copolymer having an ethylene unit content of 1 mol % or more and less than 20 mol %, a viscosity-average polymerization degree of 200 to 5000, and a saponification degree of 80 to 99.99 mol %, wherein a crystallinity in water Cw (30° C.) at 30° C. and a crystallinity in water Cw (70° C.) at 70° C. as determined by pulse NMR satisfy formula (I). There is thus provided ethylene-vinyl alcohol copolymer particles having excellent solubility in water and excellent gas barrier performance.

    AQUEOUS EMULSION AND ADHESIVE USING SAME
    12.
    发明申请
    AQUEOUS EMULSION AND ADHESIVE USING SAME 审中-公开

    公开(公告)号：US20200157390A1

    公开(公告)日：2020-05-21

    申请号：US16625355

    申请日：2018-06-21

    Applicant: KURARAY CO., LTD.

    Inventor： Yoriko IMAOKA ,  Keisuke MORIKAWA ,  Tatsuya TANIDA

    IPC: C09J131/04 ,  C08F118/08 ,  C08F220/34 ,  C08F220/06 ,  C09J133/14 ,  C09J133/02 ,  C08L31/04 ,  C08L33/14 ,  C08L33/02

    Abstract: The present invention provides an aqueous emulsion that excels in heat resistance, water resistance (particularly, hot water resistance and boiling resistance), and viscosity stability. The present invention relates to an aqueous emulsion comprising an ethylenically unsaturated monomer unit-containing polymer (A) as a dispersoid and a vinyl alcohol polymer (B) as a dispersant, wherein the ethylenically unsaturated monomer unit-containing polymer (A) comprises: a structural unit derived from a radical-polymerizable ethylenically unsaturated monomer (p) having a functional group represented by the following general formula (P); and a structural unit derived from a radical-polymerizable ethylenically unsaturated monomer (q) having a functional group represented by the following general formula (Q), wherein X and Y are the same or different, and each represent an oxygen atom or a sulfur atom, Z is an oxygen atom or a nitrogen atom, * represents a bond, and m is 1 or 2.

    POLYVINYL ALCOHOL COMPOSITION AND USE THEREOF
    14.
    发明申请
    POLYVINYL ALCOHOL COMPOSITION AND USE THEREOF 审中-公开

    公开(公告)号：US20190338115A1

    公开(公告)日：2019-11-07

    申请号：US16473773

    申请日：2017-12-27

    Applicant: KURARAY CO., LTD.

    Inventor： Tadahito FUKUHARA ,  Keisuke MORIKAWA ,  Taeko KAHARU

    IPC: C08L29/04 ,  C08F2/20 ,  C08F2/44 ,  C08K5/053 ,  C08F216/06 ,  D21H27/00 ,  D21H19/60

    Abstract: There is provided a composition (C) comprising a modified PVA (A) and a compound (B), wherein the modified PVA (A) contains 0.01 mol % or more and less than 2 mol % of double bonds derived from an unsaturated carboxylic acid or a derivative thereof in side chains; the compound (B) is a compound having a conjugated double bond and two or more hydroxy groups bonded to the conjugated double bond, or a salt or oxide thereof; and a content of the compound (B) in the composition (C) is 0.001 parts by mass or more and less than 5 parts by mass based on 100 parts by mass of the modified PVA (A). The composition (C) has excellent hue, contains less insolubles in water, and has excellent water solubility.

    VINYL ALCOHOL-BASED GRAFT POLYMER, METHOD FOR PRODUCING SAME, AND ION-EXCHANGE MEMBRANE USING SAME
    17.
    发明申请
    VINYL ALCOHOL-BASED GRAFT POLYMER, METHOD FOR PRODUCING SAME, AND ION-EXCHANGE MEMBRANE USING SAME 有权
    基于乙烯醇的聚酰胺聚合物，其制备方法和使用其的离子交换膜

    公开(公告)号：US20150259457A1

    公开(公告)日：2015-09-17

    申请号：US14728279

    申请日：2015-06-02

    Applicant: KURARAY CO., LTD.

    Inventor： Takuma KANESHIMA ,  Yusuke AMANO ,  Keisuke MORIKAWA

    IPC: C08F265/04 ,  B01J41/14 ,  B01J39/20

    CPC classification number: C08F265/04 ,  B01D71/38 ,  B01D71/78 ,  B01D71/82 ,  B01D2323/38 ,  B01J39/20 ,  B01J41/14 ,  B01J47/12 ,  C08F2/38 ,  C08F261/04 ,  C08F222/06

    Abstract: Provided are (1) a vinyl alcohol graft copolymer grafting polymerizable unsaturated monomers as a graft chain onto a side-chain mercapto group-containing vinyl alcohol polymer backbone, the graft chain being attached to the polymer backbone at a mercapto group, and the backbone including: a vinyl alcohol unit and a unit represented by the following formula (I): wherein R1 is a hydrogen atom or a carboxyl group; R2 is a hydrogen atom, a methyl group, a carboxyl group, or a carboxymethyl group; and X is a divalent C1-22 group which contains a carbon atom and a hydrogen atom and may contain a nitrogen atom and/or an oxygen atom; and (2) an ion-exchange membrane having controlled swelling in water and excellent flex resistance, the membrane including a vinyl alcohol graft copolymer as described above.

    Abstract translation: 提供（1）乙烯醇接枝共聚物将可聚合不饱和单体作为接枝链接枝到含侧链巯基的乙烯醇聚合物骨架上，接枝链以巯基连接到聚合物主链上，主链包括 乙烯醇单元和由下式（I）表示的单元：其中R1是氢原子或羧基; R2是氢原子，甲基，羧基或羧甲基; X是含有碳原子和氢原子并且可以含有氮原子和/或氧原子的二价C1-22基团; 和（2）具有在水中具有受控溶胀和优异抗弯曲性的离子交换膜，该膜包括如上所述的乙烯醇接枝共聚物。

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