发明名称 |
PROCESS FOR PREPARING HIGH MELT STRENGTH POLYPROPYLENE |
摘要 |
<p>A method for producing a polypropylene-containing composition which includes (a) polymerizing a first quantity of propylene in a first reaction zone in the presence of a first polymerization catalyst to provide a first quantity of polypropylene having a weight- average molecular weight M<SUB>w,A</SUB>; (b) polymerizing a second quantity of propylene optionally mixed with a minor amount of one or more olefins other than propylene in a second reaction zone in the presence of a second polymerization catalyst to provide a second quantity of polypropylene comprising a polypropylene homopolymer or random copolymer and having a weight-average molecular weight M<SUB>w,B</SUB>; and (c) combining the first quantity of polypropylene with the second quantity of polypropylene to form a bimodal polypropylene; wherein the percent by weight of the first quantity of polypropylene in the bimodal polypropylene composition is equal to or greater than 65 percent, and the ratio M<SUB>w,B</SUB>/M<SUB>w,A </SUB>is at least about 2.</p> |
申请公布号 |
WO2007100436(A1) |
申请公布日期 |
2007.09.07 |
申请号 |
WO2007US02810 |
申请日期 |
2007.02.02 |
申请人 |
NOVOLEN TECHNOLOGY HOLDING C.V.;MAVRIDIS, HARILAOS;SHANKERNARAYNAN, MANIVAKKAM, J. |
发明人 |
MAVRIDIS, HARILAOS;SHANKERNARAYNAN, MANIVAKKAM, J. |
分类号 |
C08F10/06 |
主分类号 |
C08F10/06 |
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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