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    PRODUCTION OF MULTIMODAL POLYETHYLENE
    1.
    发明公开
    PRODUCTION OF MULTIMODAL POLYETHYLENE 有权
    多型聚乙烯的生产

    公开(公告)号：EP1117709A1

    公开(公告)日：2001-07-25

    申请号：EP99950551.4

    申请日：1999-09-24

    申请人： FINA RESEARCH S.A.

    发明人： DEBRAS, Guy ,  RAZAVI, Abbas ,  MICHEL, Jacques

    IPC分类号： C08F210/16 ,  C08L23/04 ,  C08F4/64

    CPC分类号： C08F210/16 ,  C08F4/65916 ,  C08F110/02 ,  C08L23/06 ,  C08L23/0815 ,  C08L2205/02 ,  C08L2205/025 ,  C08L2308/00 ,  C08L2314/02 ,  C08L2314/04 ,  C08L2314/06 ,  C08F4/65925 ,  C08F4/65927 ,  C08F2/001 ,  C08L2666/04 ,  C08F210/14 ,  C08F2500/01 ,  C08F2500/02 ,  C08F2500/13 ,  C08F2500/07 ,  C08F2500/12 ,  C08F2500/05 ,  C08F2500/08 ,  C08F4/24

    摘要： A process for the preparation of polyethylene resins having a multimodal molecular weight distribution which comprises: (i) contacting ethylene monomer and a comonomer comprising an alpha-olefin having from 3 to 10 carbon atoms with a first catalyst system in a first reactor under first polymerisation conditions to produce a first polyethylene having a first molecular weight, an HLMI of not more than 0.5 g/10 min and a first density of not more than 0.925 g/ml and the first catalyst system comprising: (a) a metallocene catalyst 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-C20 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 IVB transition 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; (ii) providing a second polyethylene having a second lower molecular weight and second higher density than the first polyethylene, the second polyethylene having been produced using a catalyst other than the bis tetrahydroindenyl compound; and (iii) mixing together the first and second polyethylenes to form a polyethylene resin having a multimodal molecular weight distribution.

    摘要翻译： 一种制备具有多峰分子量分布的聚乙烯树脂的方法，该方法包括：（i）在第一聚合反应中，使乙烯单体和包含具有3至10个碳原子的α-烯烃的共聚单体与第一催化剂体系接触 生产具有第一分子量，不高于0.5g / 10min的HLMI和不高于0.925g / ml的第一密度的第一聚乙烯的条件，并且所述第一催化剂体系包含：（a）茂金属催化剂，其包含 （IndH 4）2 R'MQ 2的双四氢茚基化合物，其中每个Ind是相同或不同的并且是茚基或取代的茚基，R'是包含C 1 -C 20亚烷基，二烷基锗或硅的桥或 硅氧烷或烷基膦或胺基，该桥是取代或未取代的; M为IVB族过渡金属或钒，每个Q为具有1至20个碳原子的烃基或卤素; 和（b）活化催化剂组分的助催化剂; （ii）提供具有比所述第一聚乙烯低的第二分子量和第二高密度的第二聚乙烯，所述第二聚乙烯是使用不同于所述双四氢茚基化合物的催化剂生产的; 和（iii）将第一和第二聚乙烯混合在一起以形成具有多峰分子量分布的聚乙烯树脂。