发明名称 |
Multi-stage process for producing polyethylene with lowered gel formation |
摘要 |
The present inventions relates to a process for producing polyethylene compositions comprising polymerizing polyethylene resins in a cascaded multi-stage reaction in which the reaction steps are performed in at least two slurry phase reactors (A) and (B) and at least one gas phase reactor (C) which are arranged in series in any order wherein in reactor (A) a low molecular weight ethylene homo- or copolymer fraction having a MFR2 of 100 to 2000 g/10 min, in reactor (B) a low molecular weight ethylene homo- or copolymer fraction having an MFR2 of 100 to 2000 g/10 min, and in reactor (C) a high molecular weight ethylene copolymer fraction are polymerized, and further comprising a compounding step after polymerization, wherein the final polyethylene composition has a MFR21 of 3 to 50 g/10 min, the melt flow rates being determined according to ISO 1133.
|
申请公布号 |
US8445599(B2) |
申请公布日期 |
2013.05.21 |
申请号 |
US200913129800 |
申请日期 |
2009.10.16 |
申请人 |
GUSTAFSSON BILL;HATONEN JARI;REKONEN PETRI;VAHTERI MARKKU;FREDRIKSEN SIW BODIL;FOLLESTAD ARILD;SKAU KARL ISAK;BOREALIS AG |
发明人 |
GUSTAFSSON BILL;HATONEN JARI;REKONEN PETRI;VAHTERI MARKKU;FREDRIKSEN SIW BODIL;FOLLESTAD ARILD;SKAU KARL ISAK |
分类号 |
C08L23/00;C08F2/00;C08F4/00;C08F110/02;C08F210/00 |
主分类号 |
C08L23/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|