发明名称 |
High melt strength polypropylene |
摘要 |
The present invention concerns a high melt strength propylene polymer or copolymer suitable for manufacturing foams and thermoformed product exhibiting a melt strength of at least 3 g and comprising a high molar mass portion and a low or medium molar mass portion. The polymers are produced by subjecting propylene and optionally other olefins to polymerization in a plurality of polymerization reactors connected in series, employing different amounts of hydrogen as a molar mass modifier in at least two of the reactors, and carrying out the polymerization reaction in the presence of a catalyst system capable of catalyzing the formation of a high molar mass polymerization product having a MFR2 of less than 0.1 g/l0 min and a low or medium molar mass polymerization product having a MFR2 of more than 0.5 g/10 min.
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申请公布号 |
US6875826(B1) |
申请公布日期 |
2005.04.05 |
申请号 |
US20000508405 |
申请日期 |
2000.05.08 |
申请人 |
BOREALIS A/S |
发明人 |
HUOVINEN PAEIVI;HARLIN ALI;JAEAESKELAEINEN PIRJO;KARBASI AMIR;MANNER NINA |
分类号 |
C08J9/00;C08F2/01;C08F2/34;C08F4/645;C08F4/654;C08F4/6592;C08F10/06;C08F110/06;(IPC1-7):C08F2/34;C08F210/06 |
主分类号 |
C08J9/00 |
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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