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68 条记录 (耗时 0.023 秒)

    Method for preparing block copolymers of propylene
    21.
    发明授权
    Method for preparing block copolymers of propylene 失效
    制备丙烯嵌段共聚物的方法

    公开(公告)号：US5175208A

    公开(公告)日：1992-12-29

    申请号：US377268

    申请日：1989-07-10

    申请人： Tadashi Asanuma ,  Mitsuru Ito ,  Tutomu Iwatani ,  Kaoru Kawanishi ,  Nobutaka Uchikawa ,  Shigeru Kimura ,  Ryuichi Sugimoto

    发明人： Tadashi Asanuma ,  Mitsuru Ito ,  Tutomu Iwatani ,  Kaoru Kawanishi ,  Nobutaka Uchikawa ,  Shigeru Kimura ,  Ryuichi Sugimoto

    IPC分类号： C08F297/08

    CPC分类号： C08F297/083

    摘要： An improved method for preparing block copolymers of propylene which comprises providing a polymerizer composed of at least two reaction vessels connected to one another, substantially homopolymerizing propylene in a first step and then copolymerizing ethylene and propylene in a second step in the presence of a stereoregular catalyst, characterized by carrying out the homopolymerization of propylene in the polymerizer composed of at least two reaction vessels connected to one another in series, then introducing the resulting polymer slurry into a countercurrent washing column and countercurrently washing the slurry with propylene, introducing the washed slurry withdrawn from the lower part of the washing column into a reaction vessel in the second step connected to the washing column and performing the polymerization of ethylene and propylene, of which ratio ranges from 15/85 to 95/5. According to this method, a block copolymer of propylene exhibiting excellent physical properties can be obtained efficiently.

    Syndiotactic propylene copolymer, preparation of the same, and resin composition containing the same
    26.
    发明授权
    Syndiotactic propylene copolymer, preparation of the same, and resin composition containing the same 失效
    间同立构丙烯共聚物，其制备方法和含有它们的树脂组合物

    公开(公告)号：US5534595A

    公开(公告)日：1996-07-09

    申请号：US468316

    申请日：1995-06-06

    申请人： Tadashi Asanuma ,  Hiroshi Matsuzawa ,  Tateyo Sasaki ,  Kaoru Kawanishi

    发明人： Tadashi Asanuma ,  Hiroshi Matsuzawa ,  Tateyo Sasaki ,  Kaoru Kawanishi

    IPC分类号： C08F8/00 ,  C08F4/642 ,  C08F210/06

    CPC分类号： C08F8/00

    摘要： Disclosed is a syndiotactic propylene copolymer containing 0.01 to 40 mol % of olefin units containing --OH group in the side chain. Of absorption peaks attributed to the methyl groups of the propylene units on an absorption spectrum by .sup.13 C-NMR of the copolymer, the intensity of an absorption peak observed at about 20.2 ppm is 0.3 or more of the intensity of absorption peaks of all the methyl groups attributed to the propylene units. The copolymer is produced by copolymerizing propylene and an alkenylsilane or alkenylborane compound in the presence of a catalyst system comprising an asymmetric ligands-having transition metal compound and an aluminoxane, followed by heat-treating the resulting propylene-alkenylsilane copolymer in the presence of a trialkylamine oxide and KF.HF or oxidizing and decomposing the resulting propylene-alkenylborane compound copolymer. Also disclosed is a resin composition comprising the copolymer and other polyolefin(s).

    摘要翻译： 公开了含侧链中含有-OH基的烯烃单元为0.01〜40摩尔％的间同立构丙烯共聚物。 归因于丙烯单元的甲基的吸收峰在共聚物的13 C-NMR吸收光谱上，在约20.2ppm处观察到的吸收峰的强度为所有甲基的吸收峰的强度的0.3以上 归因于丙烯单元。 共聚物通过在包含不对称配体的过渡金属化合物和铝氧烷的催化剂体系的存在下共聚丙烯和烯基硅烷或烯基硼烷化合物，然后在三烷基胺存在下热处理所得的丙烯 - 链烯基硅烷共聚物 氧化物和KF.HF，或氧化和分解得到的丙烯 - 烯基硼烷化合物共聚物。 还公开了包含共聚物和其它聚烯烃的树脂组合物。

    Molded articles of syndiotactic polypropylene and method for preparing same
    28.
    发明授权
    Molded articles of syndiotactic polypropylene and method for preparing same 失效
    间同立构聚丙烯的成型制品及其制备方法

    公开(公告)号：US5591817A

    公开(公告)日：1997-01-07

    申请号：US210082

    申请日：1994-03-18

    申请人： Tadashi Asanuma ,  Tateyo Sasaki ,  Mitsuru Ito ,  Tetusnosuke Shiomura

    发明人： Tadashi Asanuma ,  Tateyo Sasaki ,  Mitsuru Ito ,  Tetusnosuke Shiomura

    IPC分类号： C08J5/00 ,  B29C35/00 ,  B29C67/24 ,  B29C71/02 ,  B29K23/00 ,  B29K105/32 ,  C08F4/642 ,  C08F110/06 ,  C08F10/06

    CPC分类号： B29C67/24 ,  B29K2023/12 ,  B29K2995/0026 ,  C08F110/06 ,  Y10T428/26

    摘要： A molded article of a syndiotactic polypropylene having excellent transparency in which a melting point attributed to the polypropylene having the syndiotactic structure measured at a heating rate of 10.degree. C./minute by differential scanning thermal analysis is represented by a substantially single peak, the aforesaid molded article being prepared by heating, melting and then hot-molding a homopolymer of propylene or a copolymer of propylene and a small amount of another olefin, which have a substantially syndiotactic structure, or a mixture of the homopolymer or the copolymer and a small amount of a polypropylene having a substantially isotactic structure, followed by quenching, or, after these steps, additionally subjecting the above molded article to a heat treatment at a temperature of less than its melting point. A method for preparing the above molded article is also disclosed here.

    摘要翻译： 间隔立构聚丙烯的模塑制品具有优异的透明性，其中通过差示扫描热分析以10℃/分钟的加热速率测量的具有间同立构结构的聚丙烯的熔点由基本上单峰表示，上述 通过将具有基本上间同立构结构的丙烯或丙烯与少量的另一种烯烃的共聚物或均聚物或共聚物的混合物和少量的均聚物进行加热，熔融，然后热模塑， 的具有基本上全同立构结构的聚丙烯，然后淬火，或者在这些步骤之后，另外对上述模塑制品在低于其熔点的温度进行热处理。 此处也公开了制备上述模制品的方法。