公开(公告)号：US20190249028A1

公开(公告)日：2019-08-15

申请号：US16316823

申请日：2017-07-05

申请人： Akio KAMEYAMA ,  KURARAY CO., LTD. ,  FUJI SILYSIA CHEMICAL LTD.

发明人： Tadahito FUKUHARA ,  Keisuke MORIKAWA ,  Mitsuteru OGAWA ,  Mutsuhiro ITO ,  Yoshio NAKANO ,  Akio KAMEYAMA

IPC分类号： C09D129/04 ,  C09D5/16 ,  C08K3/22 ,  C08K3/36

摘要： The present invention provides an aquatic organism repellent paint composition having good dispersion stability and capable of maintaining the repellent effect on aquatic organisms over a long time. The present invention relates to an aquatic organism repellent paint composition containing: a vinyl alcohol polymer (A) having a degree of saponification of more than 65 mol % and less than 88 mol %; an inorganic oxide (B); and a solvent (C).

公开(公告)号：US20200032458A1

公开(公告)日：2020-01-30

申请号：US16498507

申请日：2018-03-29

申请人： KURARAY CO., LTD.

发明人： Keisuke MORIKAWA ,  Taeko KAHARU

IPC分类号： D21H27/00 ,  C09D129/04 ,  D21H21/16 ,  D21H19/12 ,  D21H19/32 ,  D21H19/82

摘要： Release paper base paper, includes; a substrate; and a coating agent containing a polyvinyl alcohol (A) and a compound (B), the substrate coated with the coating agent, wherein the compound (B) is unsaturated carboxylic acid or a derivative thereof having a pKa of less than 4.00, and 0.1 part by mass or more and 20 parts by mass or less of the compound (B) is contained based on 100 parts by mass of the polyvinyl alcohol (A). The release paper base paper of the present invention is excellent in sealing properties for silicone and waterproofness. The release paper base paper of the present invention is also capable of accelerating curing of silicone in a release layer.

公开(公告)号：US20160319048A1

公开(公告)日：2016-11-03

申请号：US15108155

申请日：2014-12-25

申请人： KURARAY CO., LTD.

发明人： Masaki KATO ,  Keishi HACHIYA ,  Tatsuya TANIDA ,  Keisuke MORIKAWA ,  Yusuke AMANO

IPC分类号： C08F8/12 ,  C08F116/06

CPC分类号： C08F8/12 ,  C08F116/06 ,  C08F216/06 ,  C08F2800/10 ,  C08F218/08 ,  C08F218/12 ,  C08F216/04 ,  C08F216/08

摘要： Provided is a modified polyvinyl alcohol containing 0.1 to 10 mol % of a monomer unit represented by formula (1) below and having a degree of polymerization exceeding 2000. This provides a modified polyvinyl alcohol an aqueous solution of which foams less and which has excellent film strength and gas barrier properties under high humidity conditions, while having excellent water solubility. [In formula (1), R1 represents a hydrogen atom or a methyl group.]

摘要翻译： [式（1）中，R 1表示氢原子或甲基。]

公开(公告)号：US20220177733A1

公开(公告)日：2022-06-09

申请号：US17601232

申请日：2020-04-02

申请人： KURARAY CO., LTD.

发明人： Yoriko IMAOKA ,  Keisuke MORIKAWA ,  Tatsuya TANIDA

IPC分类号： C09J4/06 ,  C09J11/08 ,  C09J11/06 ,  C09J129/04

摘要： An aqueous emulsion may include an ethylene-vinyl alcohol copolymer (A) as a dispersant and a polymer (B) which contains an ethylenically unsaturated monomer unit as a dispersoid, wherein the ethylene-vinyl alcohol copolymer (A) has an ethylene unit content of 1 mol % or more and less than 20 mol %; and a crystallinity in water at 30° C. (Cw (30° C.)) and a crystallinity in water at 70° C. (Cw (70° C.)) as determined by pulse NMR satisfying formula (I). Such aqueous emulsions can form fewer aggregates and exhibit excellent water-resistant adhesiveness and excellent film formability.

公开(公告)号：US20210238401A1

公开(公告)日：2021-08-05

申请号：US17159254

申请日：2021-01-27

申请人： KURARAY CO., LTD.

发明人： Ghebrehiwet GHEBREMESKEL ,  Keisuke MORIKAWA ,  Richard CAZARES ,  Masaki KATO

IPC分类号： C08L29/04 ,  C08J3/12 ,  C09K8/12

摘要： Disclosed are particulate polyvinyl alcohol-based compositions for use in manufacturing chemical materials and in other industrial operations, and for treatments applied to a subterranean formation traversed by the borehole of an oil or gas well, which compositions are prepared by granulating polyvinyl alcohol polymers, and admixing the granules so produced with powder and/or crushing the granules to a specified particle size distribution.

公开(公告)号：US20150224472A1

公开(公告)日：2015-08-13

申请号：US14692986

申请日：2015-04-22

申请人： KURARAY CO., LTD.

发明人： Keisuke MORIKAWA ,  Yusuke AMANO ,  Naoyuki IWACHIDO ,  Naoki FUJIWARA ,  Takumi TAKAYAMA

IPC分类号： B01J20/26 ,  C08J3/12 ,  B01J39/18 ,  C08F261/04 ,  B01J20/28 ,  B01J20/30

CPC分类号： B01J20/264 ,  B01D15/00 ,  B01J20/28004 ,  B01J20/28016 ,  B01J20/28083 ,  B01J20/28085 ,  B01J20/30 ,  B01J20/3014 ,  B01J20/3028 ,  B01J20/3071 ,  B01J20/3078 ,  B01J20/3085 ,  B01J20/321 ,  B01J20/3212 ,  B01J20/3219 ,  B01J20/3272 ,  B01J20/3278 ,  B01J20/3293 ,  B01J20/3425 ,  B01J20/3475 ,  B01J39/18 ,  C02F1/285 ,  C02F2101/20 ,  C02F2101/22 ,  C08F8/32 ,  C08F255/02 ,  C08F261/04 ,  C08F271/02 ,  C08J3/12 ,  C08J9/26 ,  C08J2201/046 ,  C08J2323/08 ,  C08J2329/04 ,  C08J2351/06 ,  C08J2429/04 ,  C08J2451/06 ,  C22B3/24 ,  Y02P10/234 ,  Y10T428/2982 ,  C08F220/32 ,  C08F220/28 ,  C08F220/54

摘要： Provided are graft copolymer particles enabling introduction of adsorptive functional groups adsorbing metals and others, a method for producing same, and an adsorbent using same. (1) Porous graft copolymer particles containing graft chains introduced into porous particles (particle surface having an average pore diameter of 0.01-50 μm) including at least one resin selected from olefin resins, water-insoluble modified polyvinyl alcohol resins, amide resins, cellulosic resins, chitosan resins and (meth)acrylate resins. (2) A method for producing porous graft copolymer particles including (I) melt-kneading a polymer A and a polymer B other than the polymer A to obtain a compound material, (II) extracting and removing the polymer B from the compound material to obtain a porous material of the polymer A, (III) granulating the porous material, and (IV) introducing graft chains into the porous particles. (3) An adsorbent of porous graft copolymer particles.

摘要翻译： 提供能够引入吸附金属等的吸附官能团的接枝共聚物颗粒，其制造方法和使用它们的吸附剂。 （1）含有接枝链的多孔接枝共聚物颗粒，其导入到多孔颗粒（平均孔径为0.01〜50μm的颗粒表面）中，包含至少一种选自烯烃树脂，水不溶性改性聚乙烯醇树脂，酰胺树脂，纤维素 树脂，壳聚糖树脂和（甲基）丙烯酸酯树脂。 （2）一种生产多孔接枝共聚物颗粒的方法，其包括（I）熔融捏合除聚合物A以外的聚合物A和聚合物B以获得复合材料，（II）从复合材料中提取和除去聚合物B至 获得聚合物A的多孔材料，（III）对多孔材料进行造粒，和（IV）将接枝链引入多孔颗粒中。 （3）多孔接枝共聚物颗粒的吸附剂。

公开(公告)号：US20210108111A1

公开(公告)日：2021-04-15

申请号：US17047855

申请日：2019-04-16

申请人： KURARAY CO., LTD.

发明人： Tatsuya TANIDA ,  Keisuke MORIKAWA ,  Masako KATAYAMA

IPC分类号： C09J129/04 ,  C08F216/06 ,  C09J11/04

摘要： There is provided an ethylene-vinyl alcohol copolymer with 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 99.7 mol %, wherein a block character of ethylene units in the ethylene-vinyl alcohol copolymer is 0.90 to 0.99. Such an ethylene-vinyl alcohol copolymer has excellent high-speed coating ability and water-resistant adhesiveness, particularly when being used as an adhesive.

公开(公告)号：US20200291217A1

公开(公告)日：2020-09-17

申请号：US16065551

申请日：2016-12-20

申请人： KURARAY CO., LTD.

发明人： Tatsuya TANIDA ,  Keisuke MORIKAWA

IPC分类号： C08L29/04 ,  C09J129/04

摘要： The present invention provides an aqueous emulsion excellent in heat resistance, water resistance (particularly, hot water resistance and boiling resistance), and viscosity stability. The present invention also provides an adhesive containing the aqueous emulsion, forming an adhesive layer resistant to staining, and ensuring a high level of safety. The present invention relates to an aqueous emulsion containing an ethylenically unsaturated monomer unit-containing polymer (A) as a dispersoid and vinyl alcohol polymer (B) as a dispersant, wherein, the ethylenically unsaturated monomer unit-containing polymer (A) includes a structural unit derived from a radical-polymerizable ethylenically unsaturated monomer (a) having a functional group represented by the following general formula (W), and the degree of saponification of the vinyl alcohol polymer (B) is 80 mol % or more: wherein, X is an oxygen atom or sulfur atom, and * represents a bond.

公开(公告)号：US20210269699A1

公开(公告)日：2021-09-02

申请号：US17183407

申请日：2021-02-24

申请人： KURARAY CO., LTD.

发明人： Ghebrehiwet GHEBREMESKEL ,  Keisuke MORIKAWA ,  Takuma KANESHIMA

IPC分类号： C09K8/508 ,  C08F216/06 ,  C08F210/02 ,  C09K8/504 ,  E21B33/13

摘要： A particulate compacted copolymer polyvinyl alcohol-based composition that can be used as a plugging agent for minimizing or eliminating loss of circulation of fluids during the process of well drilling, workover, completion and cementing in the production of oil and gas.

公开(公告)号：US20210009842A1

公开(公告)日：2021-01-14

申请号：US17041807

申请日：2019-03-25

申请人： KURARAY CO., LTD.

发明人： Keisuke MORIKAWA ,  Tatsuya TANIDA ,  Yuta TAOKA

IPC分类号： C09D129/04 ,  C09D133/02 ,  C09J129/04 ,  C09J133/02 ,  C08K3/013 ,  C08K5/00 ,  D21H19/20

摘要： The present invention provides a coating agent having a reduced methanol content, an adhesive including the coating agent and excellent in coating performance and adhesiveness, and a coated product including the coating agent and excellent in water resistance and alcohol resistance. The present invention relates to a coating agent comprising a modified vinyl alcohol polymer (A), the modified vinyl alcohol polymer (A) comprising a structural unit derived from a derivative (a) of an ethylenically unsaturated dicarboxylic acid in a content (X) of 0.05 mol % or more and 10 mol % or less, having a degree of saponification of 80.0 mol % or more and 99.9 mol % or less, having a methanol content of less than 3.0 mass % as measured by headspace gas chromatography, and having an amount of 0.1 ppm or more and less than 2,000 ppm of a component insoluble in a 90° C., 5 mass % aqueous solution.