公开(公告)号：US20220220332A1

公开(公告)日：2022-07-14

申请号：US17605849

申请日：2020-04-24

Applicant: Kuraray Co., Ltd

Inventor： Yuki TACHIBANA ,  Yusuke AMANO ,  Kazuhiko MAEKAWA

IPC: C09D129/04 ,  C08F16/06 ,  C08K3/36 ,  C08K3/34 ,  C09D7/61 ,  C09D7/65 ,  C09D5/14 ,  B65D65/42

Abstract: A coating composition may include a modified polyvinyl alcohol resin (A) having an ethylene unsaturated group in a side chain thereof. Examples of the modified polyvinyl alcohol resin (A) include those including a structural unit represented by formula (II) or (III). Substrates in various technical fields such as the resin molding field, automobile/railway/aircraft/ships-related field, medical product field, food field, agriculture/gardening field, electrical field, and construction field can be coated with such a coating composition.

公开(公告)号：US20240287299A1

公开(公告)日：2024-08-29

申请号：US18572207

申请日：2022-06-24

Applicant: KURARAY CO., LTD.

Inventor： Yusuke AMANO ,  Yuki TACHIBANA ,  Hirotaka SAWATANI ,  Tomohiko SATO

IPC: C08L29/04 ,  C08L3/02

CPC classification number: C08L29/04 ,  C08L3/02 ,  C08L2201/10 ,  C08L2203/12 ,  C08L2203/16 ,  C08L2203/30

Abstract: A resin composition, containing an anionic group-containing modified vinyl alcohol polymer (A) and a starch (B). The starch (B) has an amylopectin content of 50 to 100% by mass. A molded body including the resin composition, which is a film or a fiber. A molded body including the resin composition, which is a water-soluble film or a water-soluble fiber.

公开(公告)号：US20220144977A1

公开(公告)日：2022-05-12

申请号：US17438697

申请日：2020-03-12

Applicant: KURARAY CO., LTD.

Inventor： Yuki TACHIBANA ,  Yusuke AMANO ,  Yuki SHIMIZU ,  Kazuhiko MAEKAWA

IPC: C08F8/14 ,  B29B9/12 ,  C08F16/06

Abstract: A method of producing modified vinyl alcohol-based polymer particles, includes mixing vinyl alcohol-based polymer particles with a mixed medium containing unsaturated carboxylic acid, an acid catalyst, and water, wherein, by mixing the vinyl alcohol-based polymer particles with the mixed medium, the vinyl alcohol-based polymer particles are reacted with the unsaturated carboxylic acid to obtain modified vinyl alcohol-based polymer particles containing a vinyl ester unit represented by a formula (2) below, having a vinyl alcohol unit content based on the total constitutional units from 95 to 99.99 mol %, and having an average particle diameter from 50 to 2000 μm. The production method does not cause the problem of the residual sulfur content derived from a liquid medium used for reaction and is also capable of modifying the vinyl alcohol-based polymer particles while maintaining the particle shape.

公开(公告)号：US20220089793A1

公开(公告)日：2022-03-24

申请号：US17418468

申请日：2019-12-26

Applicant: KURARAY CO., LTD.

Inventor： Yuki TACHIBANA ,  Yusuke AMANO ,  Yuki SHIMIZU ,  Kazuhiko MAEKAWA

IPC: C08F16/06 ,  C08J7/16

Abstract: A method of producing modified vinyl alcohol-based polymer particles, includes mixing vinyl alcohol-based polymer particles with a mixed medium containing unsaturated carboxylic acid, an acid catalyst, and water, wherein, by mixing the vinyl alcohol-based polymer particles with the mixed medium, the vinyl alcohol-based polymer particles are reacted with the unsaturated carboxylic acid to obtain modified vinyl alcohol-based polymer particles containing a vinyl ester unit represented by a formula (2) below, having a vinyl alcohol unit content based on the total constitutional units of 60 mol % or more and less than 95 mol %, and having an average particle diameter from 50 to 2000 μm. The production method is capable of controlling the particle shape and does not cause the problem of the residual sulfur content, and is further convenient and economically advantageous.