| 发明名称 | Polymers | ||
| 摘要 | Copolymers of ethylene and α-olefins having (a) a density (D) in the range 0.900-0.940 g/cm3, (b) a melt index MI2 (2.16 kg, 190° C.) in the range of 0.01-50 g/10 min, (c) a melt index MI2 (2.16 kg, 190° C.) and Dow Rheology Index (DRI) satisfying the equation [DRI/MI2]>2.65, and (d) a Dart Drop Impact (DDI) in g of a blown film having a thickness of 25 μm produced from the copolymer satisfying the equation DDI≧1900×{1−Exp [−750(D−0.908)2]}×{Exp [(0.919−D)/0.0045]}. The copolymers may be prepared using metallocene catalysis and are preferably prepared in multistage processes carried out in loop reactors in the slurry phase. The copolymers exhibit long chain branching as defined by Dow Rheology Index (DRI) and exhibit unexpected improvements in mechanical properties, in particular dart drop impact, when extruded into blown films. | ||
| 申请公布号 | US8772426(B2) | 申请公布日期 | 2014.07.08 |
| 申请号 | US201113519666 | 申请日期 | 2011.01.18 |
| 申请人 | Ineos Manufacturing Belgium NV | 发明人 | Chai Choon Kooi;Dheur Luc Marie Ghislain;Koch Benoit;Spitzmesser Stefan Klaus |
| 分类号 | C08F210/16;C08F2/12;C08F4/6592;C08F2/44 | 主分类号 | C08F210/16 |
| 代理机构 | Nixon & Vanderhye, P.C. | 代理人 | Nixon & Vanderhye, P.C. |
| 主权项 | 1. A copolymer of ethylene and an α-olefin said copolymer having (a) a density D in the range 0.900-0.940 g/cm3, (b) a melt index MI2(2.16 kg, 190° C.) in the range of 0.01-50 g/10 min, (c) a melt index MI2(2.16 kg, 190° C.) and Dow Rheology Index (DRI) satisfying the equation [DRI/MI2]>2.65, and (d) a Dart Drop Impact (DDI) in g of a blown film having a thickness of 25 μm produced from the copolymer satisfying the equation DDI≧19000×{1−Exp[−750(D−0.908)2]}×{Exp[(0.919−D)/0.0045]}. | ||
| 地址 | Antwerp BE | ||