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公开(公告)号：EP0539937A1
公开(公告)日：1993-05-05
申请号：EP92118412.3
申请日：1992-10-28
CPC分类号： C08F10/00 , Y10S526/901 , Y10S526/904 , C08F4/6492
摘要： A process for producing an olefin polymer which comprises homopolymerizing or copolymerizing an olefin in a gas phase by using a catalyst system comprising the following components A) and B):
A) a solid catalyst component prepared by immobilizing a catalyst component comprising at least titanium, magnesium, halogen and an electron-donative compound on a porous polymer material, said solid catalyst component satisfying the following conditions (a), (b) and (c):
(a) ethylene is preliminarily polymerized thereon in an amount of 50-200 g per gram of the component previously immobilized on the porous polymer material.
(b) the preliminary polymerization of ethylene is carried out at most at a rate of 3 g/g-immobilized component·hour at least until the quantity of the preliminarily polymerized ethylene reaches 5 g/g-immobilized component, and
(c) the preliminarily polymerized ethylene polymer has an intrinsic viscosity [η] of 0.5 dl/g to 2.5 dl/g as measured in tetralin at 135°C; and
B) an organoaluminum compound.
Thus, an olefin polymer small in the extent of adhesion to polymerization reactor, small in the number of fish-eyes, low in the content of fine powder, high in bulk density and good in fluidity could be produced.摘要翻译： 一种制备烯烃聚合物的方法，其包括通过使用包含以下组分A）和B）的催化剂体系在气相中均聚或共聚烯烃：A）固体催化剂组分，其通过将至少包含钛， 镁，卤素和电子给体化合物，所述固体催化剂组分满足以下条件（a），（b）和（c）：（a）乙烯在其上预先聚合的量为50-200 g每克以前固定在多孔聚合物材料上的组分。 （b）乙烯的预聚合最多以3g / g固定成分+/-小时的速度进行，至少直至预聚乙烯的量达到5g / g固定成分为止，（c） 预聚合的乙烯聚合物在135℃下在四氢化萘中测得的特性粘度ÄhÜ为0.5dl / g至2.5dl / g; 和B）有机铝化合物。 因此，可以产生在聚合反应器附着程度小，鱼眼数量小，细粉含量低，体积密度高，流动性好的烯烃聚合物。
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公开(公告)号：EP0539937B1
公开(公告)日：1996-09-18
申请号：EP92118412.3
申请日：1992-10-28
CPC分类号： C08F10/00 , Y10S526/901 , Y10S526/904 , C08F4/6492
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