Two-phase ethylene-propylene block copolymerization process
    1.
    发明授权
    Two-phase ethylene-propylene block copolymerization process 失效
    两相乙丙橡胶嵌段共聚工艺

    公开(公告)号:US4334041A

    公开(公告)日:1982-06-08

    申请号:US283777

    申请日:1981-07-16

    CPC分类号: C08F297/083 C08F297/08

    摘要: A process for the preparation of ethylene-propylene block copolymers at improved catalyst productivity rates involving the formation of a propylene prepolymer by polymerization of propylene in liquid phase in the presence of a catalyst system containing titanium halide supported on magnesium halide and aluminum alkyl complexed with an electron donor. Ethylene and propylene are block polymerized onto the prepolymer in a vapor phase reaction zone in the presence of further added quantities of similar catalyst components. The product of the process has higher ethylene and block contents as compared to products formed with none or only one of the components being added to the vapor phase reaction zone.

    摘要翻译: 一种用于制备乙烯 - 丙烯嵌段共聚物的方法,其催化剂生产率提高,涉及通过丙烯在液相中聚合形成丙烯预聚物,所述催化剂体系包含负载在卤化镁上的卤化钛和与 电子给体。 在进一步添加量相似的催化剂组分的存在下,在气相反应区中将乙烯和丙烯嵌段聚合到预聚物上。 与没有或只有一种组分加入到气相反应区中形成的产物相比,该方法的产物具有更高的乙烯和嵌段含量。

    Ethylene-propylene block copolymerization process and product
    3.
    发明授权
    Ethylene-propylene block copolymerization process and product 失效
    乙烯 - 丙烯嵌段共聚工艺及产品

    公开(公告)号:US4284738A

    公开(公告)日:1981-08-18

    申请号:US177296

    申请日:1980-08-11

    摘要: A process for the preparation of ethylene-propylene block copolymers at high catalyst productivity rates resulting in polymer products having improved impact strength-polymerized ethylene content relationship. The improvement is obtained by reacting preformed propylene prepolymer still containing active catalyst residues with ethylene and propylene in a vapor phase reaction zone in the presence of additional aluminum trialkyl catalyst component introduced to the reaction zone. The polymer produced by the process exhibits excellent physical and mechanical properties.

    摘要翻译: 一种以高催化剂生产率制备乙烯 - 丙烯嵌段共聚物的方法,导致具有改善的冲击强度聚合乙烯含量关系的聚合物产物。 在气相反应区中,在引入反应区的另外的三烷基铝催化剂组分的存在下,使仍然含有活性催化剂残余物的预制丙烯预聚物与乙烯和丙烯反应,可以获得改进。 通过该方法制备的聚合物显示出优异的物理和机械性能。

    Multiple spindle rotary indexing machine tool
    4.
    发明授权
    Multiple spindle rotary indexing machine tool 失效
    多主轴旋转分度机床

    公开(公告)号:US4351096A

    公开(公告)日:1982-09-28

    申请号:US182212

    申请日:1980-08-28

    摘要: The disclosure relates to an improvement in multiple spindle, single drive, rotary indexing machine tool systems. The basic machine comprises a fixed circular base and a central, upwardly projecting column. An indexing circular worktable is mounted on the base, for incremental, rotary indexing movements about the central column. The worktable carries a number of rotatable, work-holding chucks or spindles, which are progressively indexable with the worktable from a loading station progressively through a series of rotationally displaced work positions. Pursuant to the invention, one of the work stations is arranged to be mechanically independent of the primary machine drive and is provided with a tool slide with independent, numerically controlled motors for X and Y axis tool movement, and a third independent motor for spindle rotation. The three motors at the final work station are coordinated by a computerized numerical control system, in itself of a known design, so that the final finish machining step may include a variety of operations not otherwise possible, such as complex contouring, threading, and the like. Additionally, the CNC controlled machining operations may be carried out in a manner to override the machining tolerance limitations which are otherwise inherent in the basic nature of the multiple spindle, rotary indexing type machine tool system.

    摘要翻译: 本公开涉及多主轴,单驱动,旋转分度机床系统的改进。 基本机器包括固定的圆形底座和中心的向上突出的柱。 分度圆形工作台安装在基座上,用于围绕中心柱的增量旋转分度运动。 工作台具有多个可旋转的工作夹紧盘或主轴,它们可随着工作台逐渐地从加载工位逐个地转位通过一系列旋转移位的工作位置。 根据本发明,其中一个工作台被设置为机械地独立于主机驱动器,并且设置有具有用于X和Y轴工具运动的独立的数控马达的工具滑块,以及用于主轴旋转的第三独立电动机 。 最终工位的三台电动机由计算机数字控制系统协调,本身就是一种已知的设计,最终精加工步骤可能包括不可能的各种操作,例如复杂轮廓线,螺纹加工和 喜欢。 此外,CNC控制加工操作可以以超越多主轴,旋转分度型机床系统的基本特性所固有的加工公差限制的方式来执行。