发明名称 |
PROCESS TO PRODUCE BIMODAL POLYOLEFINS WITH METALLOCENE CATALYSTS USING TWO REACTION ZONES |
摘要 |
A process for the preparation of polyolefins having a bi- or multimodal molecular weight distribution which comprises: (i) contacting olefin monomer and a first co-reactant with a catalyst system in a first reaction zone under first polymerisation conditions to produce a product comprising a first polyolefin having a first molecular weight and distribution; and (ii) contacting olefin monomer and a second co-reactant with a catalyst system in a second reaction zone under second polymerisation conditions to produce a second polyolefin having a second molecular weight distribution different from the first molecular weight distribution; wherein the first and second polyolefins are mixed together, wherein one of the co-reactants is hydrogen and the other is a comonomer selected from butene, methylpentene, hexene or octene, and wherein each catalyst system comprises (a) a metallocene catalyst component comprising a bis tetrahydroindenyl compound of the general formula (IndH4)2R''MQ2 in which each Ind is the same or different and is indenyl or substituted indenyl, R'' is a bridge which comprises a C1-C4 alkylene radical, a dialkyl germanium or silicon or siloxane, or an alkyl phosphine or amine radical, which bridge is substituted or unsubstituted, M is a Group IV metal or vanadium and each Q is hydrocarbyl having 1 to 20 carbon atoms or halogen; and (b) a cocatalyst which activates the catalyst component.
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申请公布号 |
WO9854232(A1) |
申请公布日期 |
1998.12.03 |
申请号 |
WO1998EP03100 |
申请日期 |
1998.05.26 |
申请人 |
FINA RESEARCH S.A.;RAZAVI, ABBAS;DEBRAS, GUY |
发明人 |
RAZAVI, ABBAS;DEBRAS, GUY |
分类号 |
C08L23/00;C08F4/64;C08F4/645;C08F4/659;C08F10/00;C08F10/02;C08F110/02;C08F210/16;C08F297/08;C08L23/08;(IPC1-7):C08F10/02 |
主分类号 |
C08L23/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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