发明名称 |
Process for polymerizing ethylene and copolymerizing ethylene with alpha-olefins and relevant catalyst. |
摘要 |
<p>Ethylene homopolymers and ethylene copolymers with alpha-(C3-C10)-olefins are obtained by polymerizing the monomers with a polymerization catalyst formed by: a) an alkyl-aluminum; and b) a modified solid catalyst component obtained by treating with a Lewis' base a non-modified solid component to be defined by means of the following formula, expressed as atomic proportions: Ti (1), Hf (0.5-3), Si (1-6), Mg (0.5-15) Al (0,5-15), X (20-60), ROH (1-10) wherein: X represents either chlorine and bromine, and R represents an either linear or branched alkyl radical of from 1 to 6 carbon atoms. The catalyst is particularly useful for controlling the molecular weight and the molecular weight distribution of ethylene homopolymers and copolymers.</p> |
申请公布号 |
EP0361598(A2) |
申请公布日期 |
1990.04.04 |
申请号 |
EP19890202371 |
申请日期 |
1989.09.20 |
申请人 |
ENICHEM ANIC S.P.A. |
发明人 |
CIARDELLI, FRANCESCO;MASI, FRANCESCO;MALQUORI, STEFANO;FERRERO, CESARE;BARAZZONI, LIA;MENCONI, FRANCESCO;MAOLLI, ANGELO;INVERNIZZI, RENZO |
分类号 |
C08F4/658;C08F4/60;C08F4/656;C08F4/6592;C08F10/00;C08F10/02 |
主分类号 |
C08F4/658 |
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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