发明授权
- 专利标题： Elastomeric copolymers of ethylene with alpha-olefins and process for their preparation
- 专利标题（中）： 乙烯与α-烯烃的弹性共聚物及其制备方法
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申请号： US08876865申请日： 1997-06-16
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公开(公告)号： US06221992B1公开(公告)日： 2001-04-24
- 发明人: Maurizio Galimberti , Luigi Resconi , Enrico Albizzati
- 申请人： Maurizio Galimberti , Luigi Resconi , Enrico Albizzati
- 优先权： ITMI93A1405 19930630
- 主分类号： C08F21006
- IPC分类号： C08F21006
摘要：
Amorphous copolymers of ethylene with propylene, and optionally with minor amounts of polyenes, have the following characteristics: (A) the % content by mole of propylene in the copolymer (%P) and the triads ratio EPE/(EPE+PPE+PPP) satisfy the following relationship: 0.01%P+EPE/(EPE+PPE+PPP)≧1 (B) less than 2% of the CH2 groups in the chain are in sequences (CH2)n, wherein n is an even number. These copolymers are obtainable by operating in the presence of particular metallocene catalysts having two fluorenyl groups joined together through a bridging group.