公开(公告)号：US11518902B2

公开(公告)日：2022-12-06

申请号：US16756243

申请日：2018-10-16

Applicant: KURARAY CO., LTD.

Inventor： Tatsuya Tanida ,  Keisuke Morikawa ,  Masato Nakamae ,  Seisuke Inada

IPC: C09D129/04 ,  C08F216/06 ,  C08J7/043 ,  C08J7/048

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.

公开(公告)号：US11414563B2

公开(公告)日：2022-08-16

申请号：US16771399

申请日：2018-12-11

Applicant: KURARAY CO., LTD.

Inventor： Keisuke Morikawa ,  Tatsuya Tanida

IPC: C09D129/04 ,  C08K5/05 ,  C09D7/20 ,  C09D7/63

Abstract: The present invention provides an aqueous solution containing an ethylene-vinyl alcohol copolymer (A), an alcohol (B) having 1 to 4 carbon atoms and water (C), wherein an ethylene unit content of the ethylene-vinyl alcohol copolymer (A) is 1 mol % or more and less than 20 mol %; 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); the ethylene-vinyl alcohol copolymer (A) is contained in 0.1 to 100 parts by mass based on 100 parts by mass of water (C); and the alcohol (B) is contained in 0.01 to 30 parts by mass based on 100 parts by mass of water (C). Thus, there is provided an aqueous solution of an ethylene-vinyl alcohol copolymer, which forms a less number of lumps and generates a reduced amount of fibrillar precipitate even when a shear stress is applied. 4 ≤ 100 - Cw ⁡ ( 30 ⁢ ° ⁢ ⁢ C . ) 100 × [ Cw ⁡ ( 30 ⁢ ° ⁢ ⁢ C . ) - Cw ⁡ ( 70 ⁢ ° ⁢ ⁢ C . ) ] ≤ 22 ( I )

公开(公告)号：US11236260B2

公开(公告)日：2022-02-01

申请号：US16554177

申请日：2019-08-28

Applicant: KURARAY CO., LTD.

Inventor： Ghebrehiwet Ghebremeskel ,  Keisuke Morikawa ,  Richard Cazares

IPC: E21B33/138 ,  C09K8/42 ,  C09K8/516 ,  C09K8/487 ,  C08L31/04 ,  C08L3/02 ,  C08K3/013 ,  C08K3/16 ,  C08K3/26 ,  C08K3/22 ,  C08L29/04 ,  C09K8/44 ,  C08F16/06 ,  C08J3/12

Abstract: A biodegradable and substantially water-soluble thermoplastic polyvinyl alcohol-based diverting agent is provided which comprises pellets of a specified polyvinyl alcohol optionally with certain specified additives, which pellets are made in an extruder and cut to a specified size.

公开(公告)号：US10759910B2

公开(公告)日：2020-09-01

申请号：US15745011

申请日：2016-07-11

Applicant: FUJI SILYSIA CHEMICAL LTD. ,  DAISYO GREEN INDUSTRY CO., LTD. ,  KURARAY CO., LTD.

Inventor： Mitsuteru Ogawa ,  Shinji Yamamoto ,  Kiyoshi Kuroda ,  Mutsuhiro Ito ,  Yoshio Nakano ,  Akio Kameyama ,  Tadahito Fukuhara ,  Keisuke Morikawa

IPC: C08J3/02 ,  C08L101/06 ,  C09D201/00 ,  C09D5/16 ,  C08J3/12 ,  C09D129/04 ,  C09D171/08 ,  C08K3/22 ,  C08K3/36

Abstract: A method for manufacturing an organism adhesion reduction paint includes a first process of gelling a raw material composition that includes polyvinyl alcohol and at least one of a hydroxyl group-containing inorganic compound or an inorganic oxide; a second process of drying and subsequently pulverizing a resulting product in the first process to thereby obtain a composite gel fine powder; and a third process of adding the composite gel fine powder to a main component of a two-component urethane paint and stirring, to thereby prepare a main component of the organism adhesion reduction paint, and also adding a curing agent immediately before use.

公开(公告)号：US20200071592A1

公开(公告)日：2020-03-05

申请号：US16554177

申请日：2019-08-28

Applicant: KURARAY CO., LTD.

Inventor： Ghebrehiwet Ghebremeskel ,  Keisuke Morikawa ,  Richard Cazares

IPC: C09K8/42 ,  C09K8/44 ,  C08L29/04

Abstract: A biodegradable and substantially water-soluble thermoplastic polyvinyl alcohol-based diverting agent is provided which comprises pellets of a specified polyvinyl alcohol optionally with certain specified additives, which pellets are made in an extruder and cut to a specified size.

公开(公告)号：US10125204B2

公开(公告)日：2018-11-13

申请号：US15440718

申请日：2017-02-23

Applicant: KURARAY CO., LTD.

Inventor： Michael Collins ,  Ghebrehiwet Ghebremeskel ,  Masaki Kato ,  Keisuke Morikawa ,  Yoriko Imaoka

IPC: C08F16/06 ,  C08F8/12 ,  C08F6/02 ,  C08F216/06 ,  C08J3/12 ,  C09D129/04 ,  D21H19/60 ,  C08F6/00 ,  C08F116/06

Abstract: The present invention relates generally to a polyvinyl alcohol composition having higher amorphous polyvinyl alcohol polymer content, a process for making such a polyvinyl alcohol composition, and various end uses thereof.

公开(公告)号：US20150210788A1

公开(公告)日：2015-07-30

申请号：US14419338

申请日：2013-08-07

Applicant: KURARAY CO., LTD.

Inventor： Makoto Okamoto ,  Keisuke Morikawa

IPC: C08F16/06 ,  B32B1/02 ,  B32B27/30 ,  B32B7/12 ,  C08L29/06 ,  C08F22/10

CPC classification number: C08F16/06 ,  B32B1/02 ,  B32B7/12 ,  B32B27/08 ,  B32B27/306 ,  B32B27/32 ,  B32B27/36 ,  B32B2307/7242 ,  B32B2307/7244 ,  B32B2307/736 ,  B32B2439/00 ,  B32B2439/40 ,  B32B2439/70 ,  C08F8/12 ,  C08F22/10 ,  C08F216/06 ,  C08L29/06 ,  Y10T428/1352 ,  Y10T428/1397 ,  Y10T428/31515 ,  Y10T428/31913 ,  Y10T428/31938 ,  C08F210/02 ,  C08F216/08 ,  C08F216/16 ,  C08F218/08 ,  C08F216/1416

Abstract: Provided is a modified ethylene-vinyl alcohol copolymer, wherein the copolymer is represented by a following formula (I), contents (mol %) of a, b, and c based on the total monomer units satisfy following formulae (1) through (3), and a degree of saponification (DS) defined by a following formula (4) is not less than 90 mol %, 18≦a≦55  (1) 0.01≦c≦20  (2) [100−(a+c)]×0.9≦b≦[100−(a+c)]  (3) DS=[(Total Number of Moles of Hydrogen Atoms in X, Y, and Z)/(Total Number of Moles of X, Y, and Z)]×100  (4).

Abstract translation: 提供了一种改性的乙烯 - 乙烯醇共聚物，其中共聚物由下式（I）表示，a，b和c的含量（mol％）基于全部单体单元满足下式（1）〜（3 ）和由下式（4）定义的皂化度（DS）不小于90mol％，18＆lt; nlE; a＆nlE; 55（1）0.01＆nlE; c＆nlE; 20（2）[100-（a + c ）]×0.9＆nlE; b＆nlE; [100-（a + c）]（3）DS = [（X，Y和Z中氢原子的摩尔数的总数）/（X，Y， 和Z）]×100（4）。

公开(公告)号：US12054645B2

公开(公告)日：2024-08-06

申请号：US17047855

申请日：2019-04-16

Applicant: KURARAY CO., LTD.

Inventor： Tatsuya Tanida ,  Keisuke Morikawa ,  Masako Katayama

IPC: C09J11/04 ,  C08F216/06 ,  C08K5/01 ,  C08K5/09 ,  C08L29/04 ,  C09J129/04 ,  C08K3/34

CPC classification number: C09J129/04 ,  C08F216/06 ,  C09J11/04 ,  C08K3/346

Abstract: An ethylene-vinyl alcohol copolymer may have 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 %. A block character of ethylene units in the ethylene-vinyl alcohol copolymer may be 0.90 to 0.99. Such an ethylene-vinyl alcohol copolymer may have excellent high-speed coating ability and water-resistant adhesiveness, particularly when being used as an adhesive.

公开(公告)号：US11944093B2

公开(公告)日：2024-04-02

申请号：US16978509

申请日：2019-03-07

Applicant: KURARAY CO., LTD.

Inventor： Taeko Kaharu ,  Keisuke Morikawa

IPC: A01N25/24 ,  A01N37/36 ,  C08K3/105 ,  C08K3/28

CPC classification number: A01N25/24 ,  A01N37/36 ,  C08K3/105 ,  C08K3/28

Abstract: The present invention provides a spreading agent for agrochemicals having superior adhesion particularly for plant surface. The present invention also provides an agrochemical spray solution having a reduced risk of leaving the spreading agent for agrochemicals on a plant surface. The present invention relates to a spreading agent for agrochemicals comprising a carboxy-modified vinyl alcohol polymer (A) having a carboxy-containing monomer unit content of 0.1 mol % to 10 mol %, a viscosity-average degree of polymerization of 200 to 5,000, and a degree of saponification of 65 mol % to 99.9 mol %.

公开(公告)号：US11767462B2

公开(公告)日：2023-09-26

申请号：US17327291

申请日：2021-05-21

Applicant: Kuraray Co., Ltd.

Inventor： Ghebrehiwet Ghebremeskel ,  Takuma Kaneshima ,  Keisuke Morikawa ,  Amanda Reneau

IPC: C09K8/508 ,  E21B33/138

CPC classification number: C09K8/5083 ,  C09K8/5086 ,  E21B33/138

Abstract: Disclosed are particulate compositions comprising particles of a blend of one or more polyvinyl alcohol polymers with one or more aliphatic polyester polymers, wherein such particulate compositions are useful, for example, as plugging agents for treatments applied to a subterranean formation traversed by the borehole of an oil or gas well.