Preparation of ethene polymers by means of a Ziegler catalyst system
    1.
    发明授权
    Preparation of ethene polymers by means of a Ziegler catalyst system 失效
    通过齐格勒催化剂体系制备乙烯聚合物

    公开(公告)号:US4713430A

    公开(公告)日:1987-12-15

    申请号:US945085

    申请日:1986-12-22

    CPC分类号: C08F10/02 Y10S526/904

    摘要: Finely divided ethene polymers are prepared by means of a Ziegler catalyst system composed of (1) a titanium-containing catalyst component obtained by precipitation in an organic liquid from (1.1) a solution of titanium tetrachloride in a hydrocarbon, (1.2) a solution of a certain organoaluminum compound in a hydrocarbon, and a catalyst component which contains (1.3) an alpha-monoalkene and (2) aluminum, wherein the (1) used has been precipitated at relatively low temperatures in an organic liquid which, at the precipitation temperature has a relatively high viscosity and comprises (a) a liquid hydrocarbon and (b), dissolved therein, relatively small amounts of polymer of an alpha-monoalkene, with the provisos that (i) for every gram-mole of the total amount of titanium tetrachloride used specific amounts of the organic liquid, of the organoaluminum compound and of the alpha-monoalkene are used and (ii) for every mole unit of the total amount of titanium tetrachloride used specific amounts are precipitated per minute and specific amounts of the alpha-monoalkene are introduced per minute.

    摘要翻译: 精细分离的乙烯聚合物通过齐格勒催化剂体系制备,该系统由以下组成:(1)通过在(1.1)四氢化碳溶液中的(1.1)有机液体中沉淀得到的含钛催化剂组分,(1.2) 烃中的某些有机铝化合物和含有(1.3)α-单链烯烃和(2)铝的催化剂组分,其中所用的(1)在相对低的温度下在有机液体中沉淀,在有机液体中,在沉淀温度 具有相对较高的粘度,并且包含(a)液体烃和(b)溶解在其中的相对少量的α-单链烯烃的聚合物,条件是(i)对于每克克数的钛的总量 使用四氯化碳使用特定量的有机液体,有机铝化合物和α-单链烯烃,和(ii)使用特定的amo的四氯化钛的总量的每摩尔单位 每分钟沉淀出单体,每分钟引入特定量的α-单链烯烃。

    Process for preparing a polyolefin pipe having inherent resistance to thermooxidative degradation
    10.
    发明申请
    Process for preparing a polyolefin pipe having inherent resistance to thermooxidative degradation 审中-公开
    制备具有固有抗热氧化降解性的聚烯烃管的方法

    公开(公告)号:US20120189772A1

    公开(公告)日:2012-07-26

    申请号:US13436287

    申请日:2012-03-30

    申请人: Heinz Vogt

    发明人: Heinz Vogt

    IPC分类号: B05D5/00 B05D7/22

    摘要: A process for producing a pipe having improved resistance to thermooxidative degradation, the process comprising melting a polyolefinic molding composition in an extruder, extruding the molten molding composition through an annular die and subsequently cooling it, wherein the inner surface of the pipe is exposed to the action of a halogen-comprising treatment gas before or after cooling.

    摘要翻译: 一种制造具有改善的抗热氧化降解性的管道的方法,该方法包括在挤出机中熔化聚烯烃模制组合物,通过环形模头挤出熔融的模制组合物,随后冷却,其中管的内表面暴露于 在冷却之前或之后的含卤素处理气体的作用。