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    • 12. 发明申请
    • PROCESS FOR PRODUCING LLDPE RESINS
    • 生产LLDPE树脂的方法
    • WO2016207270A1
    • 2016-12-29
    • PCT/EP2016/064511
    • 2016-06-23
    • BOREALIS AG
    • ALBUNIA, Alexandra RominaTUPE, RavindraSUMERIN, VictorJAMIESON, JohnAHO, JaniVAHTERI, MarkkuKELA, JarmoECKMAYR, Renate
    • C08F2/00C08L23/08
    • C08F2/001C08L23/06C08L23/0815
    • The present invention is directed to a process for producing copolymers of ethylene and at least one alpha-olefin having from 4 to 10 carbon atoms in the presence of a solid Ziegler-Natta catalyst comprising of magnesium, titanium, halogen and an internal organic compound, the copolymer having a density of from 906 to 937 kg/m 3 and a melt flow rate MFR 21 measured at 190 °C under 21.6 kg load of from 3 to 150 g/10 min comprising the steps of (A) homopolymerising ethylene or copolymerising ethylene and a first alpha-olefin having from 4 to 10 carbon atoms in a first polymerisation stage in the presence of the polymerisation catalyst, hydrogen and optionally the first alpha-olefin wherein the molar ratio of hydrogen to ethylene in the fluid reaction mixture of the first polymerisation stage is from 200 to 50000 mol/kmol and the molar ratio of the first alpha-olefin to ethylene in the fluid reaction mixture of the first polymerisation stage is from 0 to 1500 mol/kmol, to produce a first homo- or copolymer of ethylene; (B) copolymerising ethylene and a second alpha-olefin having from 4 to 10 carbon atoms in a second polymerisation stage in the presence of the first homo- or copolymer of ethylene and the solid Ziegler-Natta catalyst to produce a polymer mixture comprising the first homo- or copolymer of ethylene and a second copolymer of ethylene, the polymer mixture having a density of from 906 to 937 kg/m 3 and a melt flow rate MFR 21 of from 3 to 150 g/10 min; (C) recovering the polymer mixture, characterised in that the polymerisation catalyst comprises an internal organic compound having the formula (I): wherein in the formula (I) R 1 to R 5 are the same or different and can be hydrogen, a linear or branched C1 to C8-alkyl group, or a C3-C8-alkylene group, or two or more of R 1 to R 5 can form a ring, and the two oxygen-containing rings are individually saturated or partially unsaturated or unsaturated.
    • 本发明涉及一种在含有镁,钛,卤素和内部有机化合物的固体齐格勒 - 纳塔催化剂存在下制备乙烯和至少一种具有4-10个碳原子的α-烯烃的共聚物的方法, 共聚物的密度为906至937kg / m 3,熔体流动速率MFR21在190℃,21.6kg负载下测量为3至150g / 10min,包括以下步骤:(A)乙烯均聚或乙烯共聚,和 在聚合催化剂存在下的第一聚合阶段中具有4-10个碳原子的第一个α-烯烃,氢和任选的第一个α-烯烃,其中第一次聚合的流体反应混合物中氢与乙烯的摩尔比 阶段为200至50000mol / kmol,第一聚合阶段的流体反应混合物中第一个α-烯烃与乙烯的摩尔比为0至1500mol / kmol,以产生第一个h 乙烯或乙烯的共聚物; (B)在乙烯和固体齐格勒 - 纳塔催化剂的第一均聚物或共聚物的存在下,在第二聚合阶段中使乙烯和具有4至10个碳原子的第二α-烯烃共聚以制备包含第一 乙烯的均聚物或共聚物和乙烯的第二共聚物,所述聚合物混合物的密度为906至937kg / m 3,熔体流动速率MFR 21为3至150g / 10min; (C)回收聚合物混合物,其特征在于聚合催化剂包含具有式(I)的内部有机化合物:其中在式(I)中,R 1至R 5相同或不同并且可以是氢,直链或支链 C1至C8-烷基或C3-C8-亚烷基,或两个或更多个R 1至R 5可以形成环,并且所述两个含氧环分别为饱和或部分不饱和或不饱和的。