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    Polyarylene sulfide production method and polyarylene sulfide
    3.
    发明授权
    Polyarylene sulfide production method and polyarylene sulfide 有权

    公开(公告)号：US10072123B2

    公开(公告)日：2018-09-11

    申请号：US15540636

    申请日：2015-12-18

    Applicant: Kureha Corporation

    Inventor： Akihiro Konno ,  Ken-Ichi Takaki ,  Hiroyuki Sato

    IPC: C08G75/00 ,  C08G75/0259 ,  C08G75/0213 ,  C08G75/0281

    CPC classification number: C08G75/0259 ,  C08G75/02 ,  C08G75/0213 ,  C08G75/0281

    Abstract: A method of producing polyarylene sulfide (PAS) by subjecting a sulfur source and a dihalo aromatic compound (DHA) to polymerization reaction in an organic amide solvent under alkaline conditions, the method suppressing side reactions or the like and yielding PAS having a high degree of polymerization at a high yield is provided; and PAS having a high degree of polymerization are provided.A method of producing PAS, including: a preparation step of preparing a preparation mixture containing an organic amide solvent, a sulfur source, an alkali metal hydroxide, water, and DHA, and having a pH of 12.5 or higher; a first-stage polymerization step of heating the preparation mixture to 170° C. or higher to initiate a polymerization reaction and continuing the polymerization reaction at 240 to 280° C., thereby forming a prepolymer having a DHA conversion rate of 50% or greater (at this time, a temperature increasing rate from 220° C. to 240° C. is lower than a temperature increasing rate for 240° C. or higher); and a second-stage polymerization step of adding, in the reaction system, an alkali metal hydroxide in an amount of 1 to 20 mol % per 1 mol of the sulfur source in the presence of a phase separation agent to continue the polymerization reaction at 245 to 290° C. PAS having a melt viscosity (310° C.; shear rate: 1216 sec−1) of 0.1 to 8000 Pa·s produced by the method.

    DOWNHOLE TOOL MEMBER FOR HYDROCARBON RESOURCE RECOVERY
    5.
    发明申请
    DOWNHOLE TOOL MEMBER FOR HYDROCARBON RESOURCE RECOVERY 有权
    用于石油资源恢复的工具工具会员

    公开(公告)号：US20150292292A1

    公开(公告)日：2015-10-15

    申请号：US14398628

    申请日：2013-03-13

    Applicant: Kureha Corporation

    Inventor： Masayuki Okura ,  Hikaru Saijo ,  Katsumi Yoshida ,  Hiroyuki Sato

    IPC: E21B33/12

    CPC classification number: E21B33/12 ,  C08K7/02 ,  C08K7/06 ,  C08K7/14 ,  C08K9/08 ,  C08K2201/003 ,  C08K2201/016 ,  C09K8/88 ,  C08L67/02 ,  C08L67/04

    Abstract: A downhole tool member for hydrocarbon resource recovery, comprising a shaped body of a polyglycolic acid resin blended with an inorganic or organic short fiber reinforcement material, and having thickness reduction rate characteristics when held in water at 120° C., inclusive of: an initial thickness reduction rate (as an average for a holding period for 4 hours) which is at most 0.8 times that of a shaped body of the polyglycolic acid resin alone, and has a terminal thickness reduction rate (after the thickness decreases to 50% or less of an initial thickness) which is larger than 1.5 times the initial thickness reduction rate. As a result, it is possible to provide a downhole tool member, that is a temporary tool for formation or repair of downholes for recovery of hydrocarbon resources including oil and gas, or a part of the tool, which allows more accurate designing of collapse characteristics thereof.

    Abstract translation: 一种用于烃资源回收的井下工具构件，包括与无机或有机短纤维增强材料混合的聚乙醇酸树脂的成型体，并且当保持在120℃的水中时具有厚度减小率特性，包括：初始 厚度减少率（保持时间为4小时的平均值）为单独的聚乙醇酸树脂的成形体的至多0.8倍，并且具有终端厚度减小率（在厚度减小到50％以下之后） 的初始厚度），其大于初始厚度减小率的1.5倍。 因此，可以提供一种井下工具构件，其是用于形成或修复用于回收包括石油和天然气的烃资源或工具的一部分的下井的临时工具，其允许更精确地设计塌陷特性 其中。

    WATER-DISINTEGRABLE COMPOSITE FIBER AND METHOD FOR PRODUCING THE SAME
    6.
    发明申请
    WATER-DISINTEGRABLE COMPOSITE FIBER AND METHOD FOR PRODUCING THE SAME 审中-公开
    水消毒复合纤维及其制造方法

    公开(公告)号：US20150284879A1

    公开(公告)日：2015-10-08

    申请号：US14421560

    申请日：2013-09-12

    Applicant: Kureha Corporation

    Inventor： Takeo Takahashi ,  Yukitoshi Chiba ,  Masahiro Yamazaki ,  Hiroyuki Sato

    IPC: D01F8/14 ,  D01D5/26 ,  D01D5/08 ,  D01F6/62

    CPC classification number: D01F8/14 ,  C09K8/035 ,  C09K2208/08 ,  D01D5/08 ,  D01D5/084 ,  D01D5/26 ,  D01F6/625 ,  D10B2331/041 ,  Y10T428/2929 ,  Y10T428/2931

    Abstract: A water-disintegrable composite fiber comprising a phase containing a polyglycolic acid resin and a phase containing a polylactic acid resin with a D-lactic acid unit ratio of at least 1.0%; the two phases extending continuously in a lengthwise direction; and the composite fiber having a cross sectional area formed by the phase containing the polyglycolic acid resin having an area ration of at most 50%; and the content of the polyglycolic acid resin being from 2 to 100 parts by mass per 1 part by mass of the D-lactic acid units in the polylactic acid resin.

    Abstract translation: 一种水分解复合纤维，其包含含有聚乙醇酸树脂的相和含有D-乳酸单位比为至少1.0％的聚乳酸树脂的相; 两相沿长度方向连续延伸; 所述复合纤维的面积比例为50％以下的含有聚乙醇酸树脂的相的相的截面积。 聚乙醇酸树脂的含量相对于聚乳酸树脂中的每1质量份D-乳酸单元为2〜100质量份。

    SOLIDIFICATION- AND EXTRUSION-MOLDED ARTICLE OF POLYGLYCOLIC ACID AND METHOD FOR MANUFACTURING SAME
    7.
    发明申请
    SOLIDIFICATION- AND EXTRUSION-MOLDED ARTICLE OF POLYGLYCOLIC ACID AND METHOD FOR MANUFACTURING SAME 审中-公开
    聚乳酸的固化和挤出成型品及其制造方法

    公开(公告)号：US20150252646A1

    公开(公告)日：2015-09-10

    申请号：US14433490

    申请日：2013-11-14

    Applicant: KUREHA CORPORATION

    Inventor： Masayuki Okura ,  Takeo Takahashi ,  Hiroyuki Sato

    IPC: E21B33/12 ,  B29C47/00

    CPC classification number: E21B33/1208 ,  B29C47/0004 ,  B29C47/0016 ,  B29C47/0021 ,  B29C47/003 ,  B29C47/0033 ,  B29C47/0061 ,  B29C47/0066 ,  B29C47/8805 ,  B29C47/8815 ,  B29C47/90 ,  B29C47/92 ,  B29C2947/92695 ,  B29C2947/92704 ,  B29K2033/04 ,  B29L2031/003 ,  E21B33/138 ,  Y10T428/298

    Abstract: A solidification- and extrusion-molded article of polyglycolic acid that is formed of a resin material containing polyglycolic acid, the polyglycolic acid having a melt viscosity of 200 to 2,000 Pa·s when measured at a temperature of 270° C. under a shearing speed of 120 sec−1, and has a thickness or diameter of greater than 100 mm but not greater than 500 mm; a downhole tool or a component thereof and a ball sealer for petroleum excavation that are formed by cutting the solidification- and extrusion-molded article; a method for manufacturing the solidification- and extrusion-molded article of polyglycolic acid, the method comprising a step of, after solidification- and extrusion-molding the resin material containing polyglycolic acid, pressurizing the solidified and extruded matter, and drawing the same while applying back pressure thereto in a direction of a forming die to thereby suppress the expansion of the solidified and extruded matter in a thickness direction or radial direction; and a method for manufacturing a ball sealer for petroleum excavation and the like.

    Abstract translation: 由聚乙醇酸树脂材料形成的聚乙醇酸的固化和挤出成型制品，当在270℃的温度下在剪切速度下测定时，聚乙醇酸的熔体粘度为200〜2000Pa·s 为120秒-1，厚度或直径大于100毫米但不大于500毫米; 通过切割固化和挤出成型制品而形成的用于石油开采的井下工具或其部件和球封闭器; 制造聚乙醇酸的固化和挤出成型制品的方法，该方法包括在固化和挤出成型含有聚乙醇酸的树脂材料之后，对固化和挤出物质加压并在施加时将其拉伸的步骤 在成形模具的方向上对其进行背压，从而抑制凝固和挤出物质在厚度方向或径向上的膨胀; 以及用于制造用于石油开采的球封闭机等的方法。

    Method of producing polyarylene sulfide
    9.
    发明授权
    Method of producing polyarylene sulfide 有权

    公开(公告)号：US10647817B2

    公开(公告)日：2020-05-12

    申请号：US15761120

    申请日：2016-09-30

    Applicant: Kureha Corporation

    Inventor： Akihiro Konno ,  Ken-Ichi Takaki ,  Haruki Mokudai ,  Hiroyuki Sato

    IPC: C08G75/025 ,  C08G75/0209

    Abstract: The present invention is to provide a method that can produce polyarylene sulfide having a high viscosity at a high yield. The method of producing polyarylene sulfide according to an embodiment of the present invention includes: a preparation step of preparing a mixture containing an organic amide solvent, a sulfur source, a dihalo aromatic compound, and an alkali metal hydroxide; a first-stage polymerization step of initiating a polymerization reaction by heating the mixture and producing a prepolymer until a pH of a reaction system reaches a range of 10 to 11; and a second-stage polymerization step of continuing the polymerization reaction.

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