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公开(公告)号:US4769510A
公开(公告)日:1988-09-06
申请号:US801683
申请日:1985-11-25
IPC分类号: C08F4/00 , C07F17/00 , C08F4/60 , C08F4/64 , C08F4/642 , C08F4/659 , C08F4/6592 , C08F4/68 , C08F10/00 , C08F110/06 , C08F210/06 , C07C2/30 , C07C2/32
CPC分类号: C08F110/06 , C07F17/00 , C08F10/00 , C08F4/65912 , C08F4/65927 , Y10S526/943
摘要: In the polymerization of propylene and other higher 1-olefins, polymers which have a high degree of isotacticity and a narrow distribution of molecular weight are obtained in the presence of a catalyst system composed of a zirconium compound which is stereo-rigid and chiral and a linear or cyclic aluminoxane. In addition, the catalyst system is exceptionally active.
摘要翻译: 在丙烯和其它高级1-烯烃的聚合反应中,在立体刚性和手性的锆化合物和手性的催化剂体系存在下,得到具有高度全同立构规整度和分子量分布窄的聚合物, 线性或环状铝氧烷。 此外,催化剂体系异常活跃。
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公开(公告)号:US5086134A
公开(公告)日:1992-02-04
申请号:US424116
申请日:1989-10-19
IPC分类号: C08F4/642 , C07F17/00 , C08F2/02 , C08F4/58 , C08F4/60 , C08F4/602 , C08F4/659 , C08F4/6592 , C08F10/00 , C08F210/02 , C08F210/16
CPC分类号: C08F210/16 , C08F4/65912 , C08F4/65922 , Y10S526/902 , Y10S526/909 , Y10S526/943
摘要: The invention relates to a process for the preparation of a predominantly crystalline ethylene/propylene copolymer having less than 15 mol % of propylene units, which can be carried out in liquid propylene as the suspending agent, if metallocene catalyst components of the formulae I, II or III are employed and the partial pressures of ethylene and propylene have a specific ratio. ##STR1## By means of this process, it is possible to increase the possible uses of polymerization plants which work with liquid propylene.
摘要翻译: 本发明涉及一种制备主要结晶的乙烯/丙烯共聚物的方法,其具有小于15mol%的丙烯单元,其可以在作为悬浮剂的液态丙烯中进行,如果式I,II的茂金属催化剂组分 或III,并且乙烯和丙烯的分压具有特定的比例。 (Ⅰ)<图像>(II)<图像>(III)通过该方法,可以增加与液体丙烯一起使用的聚合装置的可能用途。
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公开(公告)号:US5023388A
公开(公告)日:1991-06-11
申请号:US286326
申请日:1988-12-19
申请人: Hartmut Luker
发明人: Hartmut Luker
IPC分类号: C08F4/642 , C08F4/60 , C08F4/64 , C08F4/659 , C08F4/6592 , C08F10/00 , C08F10/02 , C08F110/02 , C08F210/02 , C08F210/16
CPC分类号: C08F110/02 , C08F10/00 , C08F10/02 , C08F210/16 , C08F4/65912 , C08F4/65925 , Y10S526/905 , Y10S526/943
摘要: Polyethylene waxes having a very narrow molecular weight distribution, high isotacticity, a narrow grain size distribution and a high bulk density are obtained by means of a catalyst comprising a metallocene and an aluminoxane, in the presence of small amounts of hydrogen during the polymerization.
摘要翻译: 在聚合过程中,在少量的氢气存在下,通过包含茂金属和铝氧烷的催化剂,获得具有非常窄的分子量分布,高全同立构规整度,窄的粒度分布和高堆积密度的聚乙烯蜡。
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公开(公告)号:US5202398A
公开(公告)日:1993-04-13
申请号:US453147
申请日:1989-12-13
申请人: Martin Antberg , Hartmut Luker , Ludwig Bohm
发明人: Martin Antberg , Hartmut Luker , Ludwig Bohm
IPC分类号: C07F17/00 , C08F4/659 , C08F4/6592 , C08F10/00
CPC分类号: C08F10/00 , C07F17/00 , C08F4/65912 , C08F4/65916 , C08F4/65925 , Y10S526/943
摘要: If the transition metal component used in an olefin polymerization catalyst is the product of the reaction between a siloxane-substituted metallocene of titanium, zirconium or hafnium and a hydroxyl group-containing support material, for example silicon dioxide, these metallocene catalysts can be employed in existing polymerization plants which are designed for the suspension process.
摘要翻译: 如果在烯烃聚合催化剂中使用的过渡金属组分是钛,锆或铪的硅氧烷取代的茂金属与含羟基的载体材料(例如二氧化硅)之间的反应的产物,则这些茂金属催化剂可用于 设计用于悬浮过程的现有聚合设备。
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公开(公告)号:US5908679A
公开(公告)日:1999-06-01
申请号:US944663
申请日:1997-10-06
申请人: Joachim Berthold , Ludwig Bohm , Werner Breuers , Johannes Friedrich Enderle , Manfred Fleissner , Rainer Lecht , Hartmut Luker , Ulrich Schulte , Heiner Bromstrup
发明人: Joachim Berthold , Ludwig Bohm , Werner Breuers , Johannes Friedrich Enderle , Manfred Fleissner , Rainer Lecht , Hartmut Luker , Ulrich Schulte , Heiner Bromstrup
IPC分类号: C08F8/00 , C08F10/02 , C08F210/02 , C08L23/04 , F16L9/12 , F16L9/127 , C08L23/06 , B29D22/00
CPC分类号: F16L9/127 , C08L23/0807 , F16L9/12 , Y10S138/07 , Y10T428/1352 , Y10T428/139 , Y10T428/1397
摘要: The invention relates to a high strength pipe of ethylene polymer having a bimodal molecular weight distribution. Such pipe has a stress cracking resistance of .gtoreq.1400 h, a fracture toughness of .gtoreq.7 mJ/mm.sup.2 and a modulus of creep in flexure, measured according to DIN 54852-Z4, of .gtoreq.1100 N/mm.sup.2. The pipe according to the invention is produced from an ethylene polymer in which the ratio of weight of the low molecular weight fraction to the weight of the higher molecular weight fraction is in the range from 0.5 to 2.0 and which has a melt flow index MFI.sub.5/190.degree. C. of .ltoreq.0.35 g/10 min. It is particularly suitable for the transportation of gases and water.
摘要翻译: 本发明涉及具有双峰分子量分布的乙烯聚合物的高强度管。 这种管具有> / = 1400h的断裂韧性,> / = 7mJ / mm 2的断裂韧性和根据DIN 54852-Z4测量的挠曲模量为> / = 1100N / mm2。 根据本发明的管道由乙烯聚合物制备,其中低分子量馏分的重量与较高分子量馏分的重量比在0.5-2.0的范围内,并且其熔体流动指数为MFI5 / 190℃为0.35g / 10min。 特别适用于运输气体和水。
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