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1. 发明申请

WO2012159927A1 RANDOM PROPYLENE COPOLYMER WITH HIGH STIFFNESS AND LOW HAZE 审中-公开
标题翻译：随机丙烯共聚物，具有高刚度和低湿度
公开(公告)号：WO2012159927A1
公开(公告)日：2012-11-29
申请号：PCT/EP2012/058985
申请日：2012-05-15
申请人： BOREALIS AG , POTTER, Elisabeth , DOSHEW, Petar , KHEIRANDISH, Saeid , LESKINEN, Pauli , GAHLEITNER, Markus
发明人： POTTER, Elisabeth , DOSHEW, Petar , KHEIRANDISH, Saeid , LESKINEN, Pauli , GAHLEITNER, Markus
IPC分类号： F01D5/02 , F01D5/34 , C08L23/14
CPC分类号： C08L23/142 , C08F210/06 , C08F210/16 , C08F2500/12 , C08F2/34 , C08F2/14 , C08F2/001
摘要： Process for the preparation of a propylene copolymer, said process is a sequential polymerization process comprising at least two reactors connected in series, wherein said process comprises the steps of (A) polymerizing in a first reactor propylene and optionally ethylene and /or a C 4 to C 12 a-olefin, obtaining a polypropylene fraction (A), (B) transferring said polypropylene fraction (A) and unreacted comonomers from the first reactor into a second reactor, (C) feeding to said second reactor propylene and ethylene and /or a C4 to C12 a-olefin, (D) polymerizing in said second reactor and in the presence of said polypropylene fraction (A) propylene and ethylene and /or a C 4 to C 12 a-olefin, obtaining a propylene copolymer fraction (B), said polypropylene fraction (A) and said propylene copolymer fraction (B) form the propylene copolymer, wherein further the temperature in the first reactor (R-1) is of more than 70 °C to equal or below 90 °C, the temperature in the second reactor (R-2) is of equal or more than 80 °C to equal or below 95 °C, in the first reactor (R-1) and second reactor (R-2) the polymerization takes place in the presence of a solid catalyst system (SCS) having a surface area measured according to ASTM D 3662 of less than 30 m 2 /g and/or a pore volume measured according to ASTM 4641 of less than 1.0 ml/g, wherein further said solid catalyst system comprises a transition metal selected from one of the groups 4 to 6 of the periodic table (IUPAC), a metal which is selected from one of the groups 1 to 3 of the periodic table (IUPAC), and an internal electron donor (ID), and said propylene copolymer has a melt flow rate MFR 2 (230 °C) of equal or more than 65 to equal or below 200 g/lOmin, and a comonomer content in the range of equal or more than 1.5 to equal or below 8.0 wt.-%.
摘要翻译：制备丙烯共聚物的方法，所述方法是包含至少两个串联连接的反应器的顺序聚合方法，其中所述方法包括以下步骤：（A）在第一反应器中聚合丙烯和任选的乙烯和/或C 4至得到聚丙烯馏分（A），（B）将所述聚丙烯馏分（A）和未反应的共聚单体从第一反应器转移到第二反应器中，（C）向第二反应器进料丙烯和乙烯和/或（D）在所述第二反应器中和在所述聚丙烯级分（A）丙烯和乙烯和/或C 4至C 12α-烯烃存在下聚合，得到丙烯共聚物部分（B），所述聚丙烯馏分（A）和所述丙烯共聚物部分（B）形成丙烯共聚物，其中第一反应器（R-1）中的温度进一步高于70℃至等于或低于90℃，第二反应器（R-2 ）等于或大于80℃至等于或低于95℃，在第一反应器（R-1）和第二反应器（R-2）中，聚合在固体催化剂体系（SCS）存在下进行，具有根据ASTM D 3662测量的表面积小于30m 2 / g和/或根据ASTM 4641测量的孔体积小于1.0ml / g，其中所述固体催化剂体系还包含选自以下之一的过渡金属：元素周期表（IUPAC）的第4至6族，选自元素周期表（IUPAC）中的1至3族之一的金属和内部电子给体（ID），所述丙烯共聚物具有熔体等于或大于65的流量MFR 2（230℃）等于或低于200g / 10min，共聚单体含量在等于或大于1.5至等于或低于8.0重量％的范围内。

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