公开(公告)号：US4866745A

公开(公告)日：1989-09-12

申请号：US31666

申请日：1987-03-30

申请人： Makoto Akai

发明人： Makoto Akai

IPC分类号： A61B6/03 ,  G01N23/04 ,  H01J35/04 ,  H05G1/70

CPC分类号： A61B6/032 ,  A61B6/4028 ,  G01N23/046 ,  H01J35/04 ,  H05G1/70 ,  G01N2223/419

摘要： An X-ray CT scanner comprises a plurality of X-ray generators which are arranged radially on a circle concentric with an object for measurement and each consists of a cathode electrode, an anode electrode constituting a target and a grid between the cathode and anode electrodes. For X-ray tomography, X-rays are projected onto the objects from the circle concentric therewith by sequentially temporarily removing a bias voltage applied to the grids of the respective X-ray generators for suppressing an electron beam directed from the cathode electrode to the anode electrode of each X-ray generator.

摘要翻译： X射线CT扫描器包括多个X射线发生器，其被放射状地布置在与测量对象同心的圆上，并且每个由阴极电极，构成靶的阳极电极和阴极和阳极之间的栅极组成 。 对于X射线断层摄影，通过依次临时移除施加到各个X射线发生器的栅极的偏置电压，将X射线投射到与其同心的圆周上的物体上，以抑制从阴极指向阳极的电子束 每个X射线发生器的电极。

公开(公告)号：US06767976B2

公开(公告)日：2004-07-27

申请号：US10452379

申请日：2003-06-03

申请人： Kenichi Hamada ,  Kazushige Ishiura ,  Toru Takahashi ,  Sachie Yaginuma ,  Makoto Akai ,  Tomohiro Ono ,  Kenji Shachi

发明人： Kenichi Hamada ,  Kazushige Ishiura ,  Toru Takahashi ,  Sachie Yaginuma ,  Makoto Akai ,  Tomohiro Ono ,  Kenji Shachi

IPC分类号： C08F452

CPC分类号： C08F4/48 ,  C08F4/52 ,  C08F20/18 ,  C08F212/08 ,  C08F297/026 ,  C08F220/14 ,  C08F2220/1825

摘要： (1) A methacrylic ester or an acrylic ester is anionically polymerized, using a polymerization initiator compound comprising an addition reaction product of a conjugated diene compound and an organic alkali metal compound, in the presence of a tertiary organoaluminum compound having in the molecule thereof a chemical structure represented by a formula: Al—O—Ar wherein Ar represents an aromatic ring; or (2) a methacrylic ester or an acrylic ester is anionically polymerized, using a polymerization initiator compound comprising an addition reaction product of an organic alkali metal compound and a compound having a 1,1-diaryl-1-alkene structure, by adding the ester in the form of a mixture with the above-mentioned specific tertiary organoaluminum compound to the polymerization system. In this way, various species of the esters can be anionically polymerized with a high initiation efficiency and a high living polymerization property in a solvent which can easily be recovered and reused under a mild cooling condition, using an organic alkali metal compound which has relatively good convenience.

摘要翻译： （1）使用包含共轭二烯化合物和有机碱金属化合物的加成反应产物的聚合引发剂化合物，在其分子内具有叔有机铝化合物的存在下，将甲基丙烯酸酯或丙烯酸酯阴离子聚合 由下式表示的化学结构：Al-O-Ar，其中Ar表示芳环; 或（2）甲基丙烯酸酯或丙烯酸酯通过使用包含有机碱金属化合物与具有1,1-二芳基-1-烯烃结构的化合物的加成反应产物的聚合引发剂化合物进行阴离子聚合， 酯与上述特定的叔有机铝化合物的混合物形式与聚合体系形成。 以这种方式，可以使用具有相对较好的有机碱金属化合物，在温和的冷却条件下，可以在溶剂中以高起始效率和高活性聚合性阴离子聚合各种物质，其可以容易地回收和重复使用 方便。

公开(公告)号：US06630554B1

公开(公告)日：2003-10-07

申请号：US09664336

申请日：2000-09-18

申请人： Kenichi Hamada ,  Kazushige Ishiura ,  Toru Takahashi ,  Sachie Yaginuma ,  Makoto Akai ,  Tomohiro Ono ,  Kenji Shachi

发明人： Kenichi Hamada ,  Kazushige Ishiura ,  Toru Takahashi ,  Sachie Yaginuma ,  Makoto Akai ,  Tomohiro Ono ,  Kenji Shachi

IPC分类号： C08F452

CPC分类号： C08F4/48 ,  C08F4/52 ,  C08F20/18 ,  C08F212/08 ,  C08F297/026 ,  C08F220/14 ,  C08F2220/1825

摘要： (1) A methacrylic ester or an acrylic ester is anionically polymerized, using a polymerization initiator compound comprising an addition reaction product of a conjugated diene compound and an organic alkali metal compound, in the presence of a tertiary organoaluminum compound having in the molecule thereof a chemical structure represented by a formula: Al—O—Ar wherein Ar represents an aromatic ring; or (2) a methacrylic ester or an acrylic ester is anionically polymerized, using a polymerization initiator compound comprising an addition reaction product of an organic alkali metal compound and a compound having a 1,1-diaryl-1-alkene structure, by adding the ester in the form of a mixture with the above-mentioned specific tertiary organoaluminum compound to the polymerization system. In this way, various species of the esters can be anionically polymerized with a high initiation efficiency and a high living polymerization property in a solvent which can easily be recovered and reused under a mild cooling condition, using an organic alkali metal compound which has relatively good convenience.

摘要翻译： （1）使用包含共轭二烯化合物和有机碱金属化合物的加成反应产物的聚合引发剂化合物，在其分子内具有叔有机铝化合物的存在下，将甲基丙烯酸酯或丙烯酸酯阴离子聚合 由下式表示的化学结构：Al-O-Ar，其中Ar表示芳环; 或（2）甲基丙烯酸酯或丙烯酸酯通过使用包含有机碱金属化合物与具有1,1-二芳基-1-烯烃结构的化合物的加成反应产物的聚合引发剂化合物进行阴离子聚合， 酯与上述特定的叔有机铝化合物的混合物形式与聚合体系形成。这样，各种酯可以在溶剂中以高引发效率和高活性聚合性阴离子聚合， 使用有利的碱金属化合物，在温和的冷却条件下容易回收和再次使用。

公开(公告)号：US06228946B1

公开(公告)日：2001-05-08

申请号：US09343519

申请日：1999-06-30

申请人： Koji Kitayama ,  Kenichi Hamada ,  Makoto Akai ,  Kazushige Ishiura

发明人： Koji Kitayama ,  Kenichi Hamada ,  Makoto Akai ,  Kazushige Ishiura

IPC分类号： C08F2502

CPC分类号： C08L53/005 ,  C08F297/02 ,  C08F297/026 ,  C08L2666/02 ,  C08L2666/04

摘要： A block copolymer comprising, in a main chain thereof, a crystalline polymer block A obtained by hydrogenation of at least 80% of unsaturated bonds of a butadiene-based polymer block having a 1,2-bond content less than 20%, a polymer block B having a glass transition point of 20° C. or lower and a polymer block C composed mainly of a methacrylate ester unit and/or an acrylate ester unit and having a glass transition point exceeding 20° C. has good elastomeric properties, excellent weather resistance, solvent resistance and heat resistance and has good affinity with each of a polar polymer and non-polar polymer. A polymer composition comprising said block copolymer effectively exhibits the above-described characteristics of the block copolymer.

摘要翻译： 一种嵌段共聚物，在其主链中包含通过氢化至少80％的具有小于20％的1,2-键含量的丁二烯基聚合物嵌段的不饱和键获得的结晶聚合物嵌段A，聚合物嵌段 B的玻璃化转变点为20℃以下，主要由甲基丙烯酸酯单元和/或丙烯酸酯单元构成的玻璃化转变点超过20℃的聚合物嵌段C具有良好的弹性，良好的天气 电阻，耐溶剂性和耐热性，并且与极性聚合物和非极性聚合物中的每一种具有良好的亲和性。 包含所述嵌段共聚物的聚合物组合物有效地表现出上述嵌段共聚物的特性。