发明授权
- 专利标题： Process for the preparation of soft propylene polymer compositions
- 专利标题（中）： 制备软丙烯聚合物组合物的方法
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申请号： US12451595申请日： 2008-05-07
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公开(公告)号： US07981982B2公开(公告)日： 2011-07-19
- 发明人: Camillo Cagnani , Enrico Beccarini , Claudio Cavalieri
- 申请人： Camillo Cagnani , Enrico Beccarini , Claudio Cavalieri
- 申请人地址： IT Milan
- 专利权人： Basell Poliolefine Italia s.r.l.
- 当前专利权人： Basell Poliolefine Italia s.r.l.
- 当前专利权人地址： IT Milan
- 代理机构： Dilworth IP LLC
- 优先权： EP07108668 20070522
- 国际申请： PCT/EP2008/055587 WO 20080507
- 国际公布： WO2008/141934 WO 20081127
- 主分类号： C08F2/34
- IPC分类号： C08F2/34 ; C08F210/06
摘要：
A process for the preparation of a propylene copolymer composition having a Flexural modulus lower than 500 MPa, a total ethylene content higher than 9% and a Xylene soluble fraction at room temperature higher than 20% comprising at least one polymerization step carried out in a gas-phase polymerization reactor comprising at least two interconnected polymerization zones said process being characterized by the fact that at least 30% by weight of said xylene soluble fraction is produced in the polymerization step carried out in a gas-phase polymerization reactor comprising at least two interconnected polymerization zones.
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