发明名称 |
Process for making low-density polyolefins |
摘要 |
A process for making ethylene copolymers is disclosed. Ethylene copolymerizes with an alpha-olefin in the presence of a catalyst system comprising an activator and a silica-supported, bridged indenoindolyl metal complex having "open architecture." The supported complex incorporates comonomers with exceptional efficiency, and the process gives ethylene copolymers having high molecular weights (Mw>100K) and very low densities (<0.910 g/cm3). Open architecture catalysts that include bridging through the indolyl nitrogen of the indenoindolyl framework are also described.
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申请公布号 |
US6559251(B1) |
申请公布日期 |
2003.05.06 |
申请号 |
US20020211085 |
申请日期 |
2002.08.02 |
申请人 |
EQUISTAR CHEMICALS, LP |
发明人 |
WANG SHAOTIAN;LEE CLIFFORD C.;MACK MARK P.;HLATKY GREGORY G.;NAGY SANDOR;TSUIE BARBARA M. |
分类号 |
C08F4/642;C08F4/659;C08F210/16;(IPC1-7):C08F4/64;C08F210/08;C08F210/14 |
主分类号 |
C08F4/642 |
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