Two step process for polymerizing ethylene
    2.
    发明授权
    Two step process for polymerizing ethylene 失效
    聚合乙烯的两步法

    公开(公告)号:US4357448A

    公开(公告)日:1982-11-02

    申请号:US151637

    申请日:1980-05-20

    摘要: Ethylene or a mixture of ethylene and a small amount of another .alpha.-olefin or diene is polymerized in two successive steps under different hydrogen partial pressures by polymerizing 30 to 70 wt. % of the ethylene or ethylene mixture to be polymerized in the presence of hydrogen at a molar ratio of ethylene or ethylene mixture to hydrogen of 1:1-8 in the first step and polymerizing the residual ethylene or the ethylene mixture at a molar ratio of ethylene to hydrogen of 1:0-0.3 in the second step, in the presence of the specific catalyst system comprising an organoaluminum compound (C) and a specific solid catalytic component (B) obtained by reacting a titanium or vanadium halogen-containing compound with a reaction product (A) obtained by reacting a Grignard reagent with a hydropoly-siloxane having the formula ##EQU1## (R.sup.1 represents an alkyl, aryl, aralkyl, alkoxy, or aryloxy group as a monovalent organic group; a is 0,1 or 2; b is 1, 2 or 3; and a+b.ltoreq.3)or a silicon compound containing an organic group and hydroxyl group in the presence or absence of an aluminum-alkoxide, aluminum alkoxy-halide halide or a reaction product obtained by reacting the aluminum compound with water.

    摘要翻译: 乙烯或乙烯与少量另外的α-烯烃或二烯的混合物在不同的氢分压下通过聚合30至70wt。 %的乙烯或乙烯混合物在氢气存在下以乙烯或乙烯混合物与氢气的摩尔比为1:1-8在第一步中聚合,并以残留的乙烯或乙烯混合物的摩尔比 在含有有机铝化合物(C)和特定固体催化剂组分(B)的特定催化剂体系存在下,第二步中乙烯与氢的摩尔比为1:0-0.3,使含钛或钒的含卤化合物与 通过使格氏试剂与具有式“IMAGE”的氢化聚硅氧烷反应得到的反应产物(A)(R1代表烷基,芳基,芳烷基,烷氧基或芳氧基作为一价有机基团; a为0,1或 2; b为1,2或3; a + b 3)或含有有机基团和羟基的硅化合物在存在或不存在铝 - 醇盐的情况下,烷氧基卤化铝卤化物或反应产物 通过使铝化合物与水分子反应获得 r。