发明授权
- 专利标题: Process for the (co)polymerization of ethylene
- 专利标题(中): 乙烯(共)聚合的方法
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申请号: US10581983申请日: 2004-11-24
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公开(公告)号: US07678867B2公开(公告)日: 2010-03-16
- 发明人: Pietro Baita , Massimo Covezzi , Gabriele Mei , Giampiero Morini , Joachim T. M. Pater
- 申请人: Pietro Baita , Massimo Covezzi , Gabriele Mei , Giampiero Morini , Joachim T. M. Pater
- 申请人地址: DE Wesseling
- 专利权人: Basell Polyolefine GmbH
- 当前专利权人: Basell Polyolefine GmbH
- 当前专利权人地址: DE Wesseling
- 代理商 William R. Reid
- 优先权: EP03104854 20031219
- 国际申请: PCT/EP2004/013372 WO 20041124
- 国际公布: WO2005/058982 WO 20050630
- 主分类号: C08F4/64
- IPC分类号: C08F4/64 ; C08F4/642 ; C08F4/649 ; C08F210/02
摘要:
A process for preparing a broad molecular weight polyethylene carried out in the presence of a catalyst system comprising (i) a solid catalyst component comprising Mg, Ti, halogen, and optionally an internal electron donor compound, and (ii) an Al-alkyl cocatalyst said process comprising at least two step of polymerization (a) and (b), in which: in a first step (a) ethylene is polymerized in the presence of a molecular weight regulator in order to produce a ethylene (co)polymer, and in a further step (b), which is carried out in the presence of an external electron donor compound added to this polymerization step as a fresh reactant, ethylene is copolymerized with an alpha olefin of formula CH2═CHR, in which R is a C1-C20 hydrocarbon group, to produce an ethylene copolymer having a molecular weight higher than that of the copolymer produced in step (b).
公开/授权文献
- US20070282083A1 Process for the (Co) Polymerization of Ethylene 公开/授权日:2007-12-06