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    • 5. 发明申请
    • PROCESS FOR POLYMERIZING PROPYLENE
    • 聚合丙烯的方法
    • US20130267667A1
    • 2013-10-10
    • US13884078
    • 2011-11-08
    • Juha PaavilainenPauli LeskinenSameli HakolaDaniel SandholzerChristelle Grein
    • Juha PaavilainenPauli LeskinenSameli HakolaDaniel SandholzerChristelle Grein
    • C08F2/04C08F2/34
    • C08F2/04C08F2/34C08F10/06C08F110/06C08F210/06C08L23/12C08L2308/00C08L2314/02C08F2/001C08F2500/02C08F210/16C08F2500/01C08F2500/17C08L23/142
    • Process for producing a propylene homopolymer, a propylene random copolymer or a heterophasic propylene polymer, which process comprises the steps of (a) prepolymerisation, (b) slurry phase polymerisation (c) gas phase polymerisation and optionally (d) one or two further gas phase polymerisation(s), whereby the process is performed in the presence of a catalyst system comprising (x) a Ziegler-Natta procatalyst and (y) an organometallic cocatalyst and (z) an external donor represented by formula (II) and/or (III) Si(OCH2CH3)3(NR1R2) (II) or R3nR4mSi(OR5)z (III) wherein R1 and R2 can be the same or different and represent a hydrocarbon group having 1 to 12 carbon atoms and R3 and R4 can be the same or different and represent a hydrocarbon group having 1 to 12 carbon atoms, R5 is methyl or ethyl, z is 2 or 3, preferably 2, m is 0 or 1, n is 0 or 1, with the proviso that n+m+z=4, the external donor being added in an amount of 3 to 30 wt %, based on the total amount of external donor added, to the prepolymerisation step and in an amount of 70 to 97 wt %, based on the total amount of external donor added, to the slurry polymerisation step.
    • 制备丙烯均聚物,丙烯无规共聚物或多相丙烯聚合物的方法,该方法包括以下步骤:(a)预聚合,(b)淤浆相聚合(c)气相聚合和任选地(d)一种或两种另外的气体 其中该方法在催化剂体系存在下进行,所述催化剂体系包含(x)齐格勒 - 纳塔前催化剂和(y)有机金属助催化剂和(z)由式(II)表示的外给体和/或 (III)Si(OCH 2 CH 3)3(NR 1 R 2)(II)或R 3 n R 4 m Si(OR 5)z(III)其中R 1和R 2可以相同或不同,表示具有1至12个碳原子的烃基,且R 3和R 4可以 相同或不同,表示具有1至12个碳原子的烃基,R 5是甲基或乙基,z是2或3,优选2,m是0或1,n是0或1,条件是n + + z = 4,外用供体加入量为3〜30重量%,基于加入的外用供体总量, 至预聚合步骤,并且以浆料聚合步骤为基础,以加入的外用供体的总量为70至97重量%的量。