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公开(公告)号：EP0879250B1
公开(公告)日：2000-09-20
申请号：EP97905774.2
申请日：1997-02-07
CPC分类号： C08F10/02 , C08F4/65912 , C08F4/65916 , C08F4/65922 , C08F4/65925 , C08F210/16 , Y10S526/943
摘要： This invention relates generally to supported metallocene catalyst systems and to methods for their production and use. Specifically, this invention relates to supported metallocene catalyst systems having improved metallocene loading and optionally reduced support particle size. These catalyst systems are particularly useful for the polymerization of ethylene polymers.
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公开(公告)号：EP0879250A1
公开(公告)日：1998-11-25
申请号：EP97905774.0
申请日：1997-02-07
CPC分类号： C08F10/02 , C08F4/65912 , C08F4/65916 , C08F4/65922 , C08F4/65925 , C08F210/16 , Y10S526/943
摘要： This invention relates generally to supported metallocene catalyst systems and to methods for their production and use. Specifically, this invention relates to supported metallocene catalyst systems having improved metallocene loading and optionally reduced support particle size. These catalyst systems are particularly useful for the polymerization of ethylene polymers.
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公开(公告)号：EP0973814A1
公开(公告)日：2000-01-26
申请号：EP98913209.7
申请日：1998-03-27
IPC分类号： C08F210/16 , C08F2/34 , C08F4/602 , C08J5/18
CPC分类号： C08J5/18 , C08F4/65912 , C08F4/65927 , C08F210/16 , C08J2323/08 , Y10S526/901 , Y10S526/943 , C08F4/65916 , C08F210/14 , C08F2500/12 , C08F2500/10 , C08F2500/26
摘要： A polymer of ethylene and at least one alpha olefin having at least 5 carbon atoms obtainable by a continuous gas phase polymerization using supported catalyst of an activated molecularly discrete catalyst such as a metallocene in the substantial absence of an aluminum alkyl based scavenger, which polymer has a Melt Index (MI) as herein defined of from 0.1 to 15; a Compositional Distribution Breadth Index (CDBI) as defined herein of at least 70 %, a density of from 0.910 to 0.930 g/ml; a Haze value as herein defined of less than 20 %; a Melt Index ratio (MIR) as herein defined of from 35 to 80; an averaged Modulus (M) as herein defined of from 20 000 to 60 000 psi (pounds per square inch) and a relation bewteen M and the Dart Impact Strength in g/mil (DIS) complying with formula (I).
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公开(公告)号：EP0946610A1
公开(公告)日：1999-10-06
申请号：EP97953206.0
申请日：1997-12-18
CPC分类号： C08F10/02 , C08F4/65912 , C08F4/65922 , C08F210/16 , Y10S526/901 , Y10S526/943 , C08F4/65916 , C08F210/14 , C08F2500/12 , C08F2500/18 , C08F2500/24 , C08F2500/07
摘要： The disclosed invention relates to a polymerization process comprising contacting ethylene, and optionally, one or more olefinically unsaturated comonomers, with an active supported Group 3, 4, 5 or 6 metallocene catalyst system having an unsubstituted or substituted fused-ring cyclopentadienyl ligand, preferably indenyl or fluorenyl, and a substituted or unsubstituted cyclopentadienyl ligand under gas-phase or slurry polymerization conditions. The process is suitable for the production of high-density polyethylene homopolymers and copolymers. Additionally, the polymers made under the invention process conditions have narrow molecular weight distributions, low MI, and low values for MIR.
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