公开(公告)号：US20150072903A1

公开(公告)日：2015-03-12

申请号：US14539266

申请日：2014-11-12

申请人： KUREHA CORPORATION

发明人： Shunsuke ABE ,  Nanako SAIGUSA ,  Masahiro YAMAZAKI ,  Hiroyuki SATO

IPC分类号： C09K8/588

CPC分类号： C09K8/588 ,  C09K8/12 ,  C09K8/5086 ,  C09K8/512 ,  C09K8/70 ,  C09K8/885 ,  C09K2208/08 ,  C09K2208/18

摘要： A dispersion liquid for supporting oil drilling, including: an aqueous medium and a particulate solid polyglycolic acid resin dispersed in the aqueous medium; wherein the particulate polyglycolic acid resin has a weight-average molecular weight of at least 70,000 and at most 500,000, and exhibits weight retentivities in water at 80° C. of at least 85% after 12 hours, at most 80% after 72 hours, and at most 45% after 168 hours. The particulate solid polyglycolic acid resin included in the above-mentioned dispersion liquid for supporting oil drilling, functions as a fluidity control material exhibiting ideal degradation charateristics in the drilling operation for expansion of oil production capacity, demanded for suppressing the liquid permeability in the early stage and recovery of the liquid permeability after completion of the operation of the formation around the oil well.

摘要翻译： 一种用于支撑石油钻井的分散液，包括：水性介质和分散在水性介质中的颗粒状固体聚乙醇酸树脂; 其特征在于，所述粒状聚乙醇酸树脂的重均分子量为70,000以上且500,000以下，12小时后，80℃下的水分重量保持率为85％以上，72小时后为80％以上， 168小时后最多45％。 上述用于支撑油钻井的分散液中包含的颗粒状固体聚乙醇酸树脂用作在用于膨胀油生产能力的钻井操作中表现出理想的降解特性的流动性控制材料，需要在早期抑制液体渗透性 并且在油井周围操作完成后恢复液体渗透性。

公开(公告)号：US20220331460A1

公开(公告)日：2022-10-20

申请号：US17754338

申请日：2020-10-01

申请人： Kureha Corporation ,  JAPAN AEROSPACE EXPLORATION AGENCY ,  FUJI MANUFACTURING CO., LTD.

发明人： Shunsuke ABE ,  Kazuhiko SHIMIZU ,  Kayoko ONIZAWA ,  Masahiro YAMAZAKI ,  Aki GOTO ,  Keiichi YANAGASE ,  Eiji MIYAZAKI ,  Yusuke UCHIUMI ,  Eri FUKUI

IPC分类号： A61L2/02 ,  B24C1/10 ,  C08L23/06

摘要： The present invention is to provide an antibacterial molded article that can increase options for the material and shape of the molded article, and a method for manufacturing the same. The object is achieved by an antibacterial molded article containing a plastic molded article, the plastic molded article having a rough region having an arithmetic average roughness Ra of a roughness curve in accordance with JIS B 0601 (2013) of 0.14 μm or greater and 0.72 μm or less provided on a surface with which bacteria can come into contact.