发明名称 |
Single catalyst low, medium and high density polyethylenes |
摘要 |
A method of polymerizing olefins comprising combining in one embodiment ethylene and optionally one or more alpha-olefins with a catalyst composition in a continuous polymerization reactor at a pressure of less than 10,000 kPa; wherein the catalyst composition comprises a hafnocene; and isolating a polyethylene having a density in the range of from 0.930 to 0.975 g/cm<SUP>3</SUP>. Also provided is a method of transitioning a continuous polymerization reactor from production of a low density polyethylene to a medium or high density polyethylene. Also provided is a medium to high density polyethylene suitable for injection or rotomolding applications. Also provided is a single catalyst composition suitable for such needs.
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申请公布号 |
US7223825(B2) |
申请公布日期 |
2007.05.29 |
申请号 |
US20060438624 |
申请日期 |
2006.05.22 |
申请人 |
UNIVATION TECHNOLOGIES, LLC |
发明人 |
KOLB RAINER;SZUL JOHN F. |
分类号 |
C08F4/64;C08F10/02 |
主分类号 |
C08F4/64 |
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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