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    • 5. 发明公开
    • Process for the preparation of ethylene-propylene copolymers
    • Verfahren zur Herstellung von Ethylen-Propylenolyolymere。
    • EP0421525A2
    • 1991-04-10
    • EP90202580.8
    • 1990-09-28
    • ENICHEM S.p.A.
    • Mirra, MauroMasi, FrancescoInvernizzi, RenzoLangianni, ElioMasini, Sergio
    • C08F210/16C08F4/654
    • C08F210/16C08F4/6543
    • A process is described for the preparation of ethylene-propylene copolymers having density values from 0.880 to 0.915 g/ml, for the copolymerization of ethylene and propylene, at a high pressure and at a high temperature, in a reactor vessel or tubular reactor, in the presence of a catalyst consisting of an aluminium trialkyl and a solid catalyst component containing 0.4 to 4.0 wt% titanium on a microspherical magnesium chloride support, in which the titanium is present partially in the trivalent and partially in the tetravalent form.
      The copolymers thus obtained are used for the production of film or for mixing with other polymers or with bitumen, in the production of bituminous casings for waterproofing, in the expanded foam sector and as a blending material for modifying the rheological character­istics of LLDPE.
    • 描述了一种制备在反应器容器或管式反应器中在高压和高温下共聚乙烯和丙烯的密度值为0.880至0.915g / ml的乙烯 - 丙烯共聚物的方法, 由三价烷基铝和含有0.4至4.0重量%钛的固体催化剂组分的催化剂在微球状氯化镁载体上的存在,其中钛部分以三价或部分为四价形式存在。 由此获得的共聚物用于生产膜或与其他聚合物或沥青混合,在生产用于防水的沥青套管中,在膨胀的泡沫塑料领域中以及用于改变LLDPE的流变特性的共混材料。