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    • 4. 发明授权
    • Polyolefin production
    • 聚烯烃生产
    • US08481665B2
    • 2013-07-09
    • US13533823
    • 2012-06-26
    • Abbas RazaviLiliana Peters
    • Abbas RazaviLiliana Peters
    • C08F210/02C08F210/08C08F210/14C08F210/16C08G61/00
    • C08F110/02C08F4/65912C08F4/65916C08F210/16Y02P20/52C08F4/63927C08F2500/12C08F2500/17C08F2500/18C08F2500/07C08F210/14
    • Use of a metallocene compound of general formula Ind2R″MQ2 as a component of a catalyst system in producing polyethylene, wherein each Ind is the same or different and is indenyl or substituted indenyl; R″ is a bridge which comprises a C1 to C4 alkylene radical, a dialkyl germanium or silicon or siloxane, alkyl phosphine or amine, 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 the ratio of meso to racemic forms of the metallocene in the catalyst system is at least 1:3. The metallocene may be supported. The ethylene may be polymerized in a reaction medium that is substantially free of any external comonomer, with comonomer being formed in situ. The produced polyethylene may have long chain branching. The produced polyethylene may be atactic.
    • 在制备聚乙烯中使用通式为Ind2R''MQ2的茂金属化合物作为催化剂体系的组分,其中每个Ind相同或不同,为茚基或取代的茚基; R“是包含C1至C4亚烷基,二烷基锗或硅或硅氧烷,烷基膦或胺的桥,该桥是取代或未取代的,M是第IV族金属或钒,并且每个Q是具有1 20个碳原子或卤素; 并且催化剂体系中金属茂的内消旋与外消旋形式的比例至少为1:3。 金属茂可以被支撑。 乙烯可以在基本上不含任何外部共聚单体的反应介质中聚合,共聚单体原位形成。 生产的聚乙烯可以具有长链支化。 生产的聚乙烯可能是无规的。