发明名称 |
PROCESS FOR PREPARING AN IN SITU POLYETHYLENE BLEND |
摘要 |
A process for the production of an in situ particulate polyethylene blend comprising contacting a magnesium/titanium based catalyst system including a particulate precursor with one or more alpha-olefins in each of two reactors connected in series, in the gas phase, with the provisos that: (a) the particulate precursor has a particle size distribution span of no greater than about 1.5; and (b) a high molecular weight polymer is formed in one reactor and a low molecular weight polymer is formed in one other reactor wherein the ratio of molecular weights of the high molecular weight polymer to low molecular weight polymer in the final product is at least about 8:1.
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申请公布号 |
CA2163467(C) |
申请公布日期 |
1999.04.13 |
申请号 |
CA19952163467 |
申请日期 |
1995.11.22 |
申请人 |
UNION CARBIDE CHEMICALS & PLASTICS TECHNOLOGY CORPORATION |
发明人 |
WAGNER, BURKHARD ERIC;RAMAMURTHY, ARAKALGUD VENKATAPATHIA |
分类号 |
C08F2/00;C08F2/34;C08F4/60;C08F4/658;C08F10/00;C08F10/02;C08F210/16;C08L23/04;C08L23/08;(IPC1-7):C08F2/34 |
主分类号 |
C08F2/00 |
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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