发明名称 |
Enhanced polymerization reactions based on use of speical methylaluminoxane compositions |
摘要 |
Polymerization of olefin monomers is conducted using at least one d- or f-block metal-containing olefin polymerization catalyst compound or complex and a novel methylaluminoxane composition (MAOC) which is a solid at 25° C. that has a total aluminum content of about 39 to 47 wt %. The MAOC is either free of aluminum as trimethylaluminum (TMA) or if TMA is present, not more than about 30 mole % of the total aluminum in the MAOC is TMA. In the solid state the MAOC contains no more than about 7500 ppm (wt/wt) of aromatic hydrocarbon. The cryoscopic number average molecular weight of MAOC as determined in benzene is at least about 1000 amu, and the MAOC has sufficient solubility in n-heptane at 25° C. to provide a solution containing 4 to as high as 7.5 wt % or more of dissolved aluminum. By vacuum distilling a solution of ordinary MAO in aromatic hydrocarbon long enough under proper conditions, MOAC is formed.
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申请公布号 |
US2002198395(A1) |
申请公布日期 |
2002.12.26 |
申请号 |
US20020198286 |
申请日期 |
2002.07.17 |
申请人 |
BRANTLEY NOEL H.;BEARD WILLIAM R. |
发明人 |
BRANTLEY NOEL H.;BEARD WILLIAM R. |
分类号 |
C07F5/06;C08F4/02;C08F4/44;C08F4/54;C08F4/60;C08F4/602;C08F4/622;C08F4/639;C08F4/6392;C08F10/00;C08F210/16;(IPC1-7):C07F5/06 |
主分类号 |
C07F5/06 |
代理机构 |
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代理人 |
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地址 |
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