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公开(公告)号:US09587055B2
公开(公告)日:2017-03-07
申请号:US12736926
申请日:2009-06-04
申请人: Choon Kooi Chai , Dominique Jan
发明人: Choon Kooi Chai , Dominique Jan
IPC分类号: F16L9/12 , C08F210/16 , C08F4/76 , F16L9/127 , C08F4/659 , C08F4/6592
CPC分类号: C08F210/16 , C08F4/65916 , C08F4/6592 , C08F2410/02 , F16L9/127 , Y10T428/139 , C08F4/65912 , C08F4/65908 , C08F210/14 , C08F2500/12 , C08F2500/19 , C08F2500/17
摘要: Copolymers comprising ethylene and alpha-olefins having (a) a density (D) in the range 930-960/g/m3 (b) a melt index (MI2) in the range 0.1-3.5 g/10 min (c) a melt elastic modulus G′ (G″=500 Pa) in the range 40 to 150 Pa, and (d) a ratio of complex dynamic shear viscosities η*(0.1)/η(100) in the range 1.5 to 5.5. The copolymers are suitable for use as Polyethylenes of Raised Temperature Resistance (PE-RT) for use in hot water piping systems. The copolymers may be prepared by use of meltallocene catalyst systems. Pipes having a time to failure of ≧500 hrs measured according to ISO 1167 at 110° C. and 2.6 MPa prepared in a single reactor are also disclosed.
摘要翻译: 包含乙烯和α-烯烃的共聚物具有(a)密度(D)在930-960 / g / m 3范围内(b)熔体指数(MI2)在0.1-3.5g / 10min的范围内(c)熔体 弹性模量G'(G“= 500Pa)在40〜150Pa的范围内,(d)复数动态剪切粘度η*(0.1)/η(100)在1.5〜5.5的范围内的比例。 该共聚物适用于热水管道系统中用作耐高温聚乙烯(PE-RT)。 共聚物可以通过使用茂金属催化剂体系来制备。 还公开了在单个反应器中制备的根据ISO 1167在110℃和2.6MPa下测量的具有≥500小时的故障时间的管道。
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公开(公告)号:US20110040012A1
公开(公告)日:2011-02-17
申请号:US12736490
申请日:2009-04-21
CPC分类号: C08L23/06 , C08K3/346 , C08K2201/016 , C08L29/04 , C08L51/06 , C08L77/00 , C08L2205/08 , C08L2666/02
摘要: Oxygen barrier compositions are described comprising 70-95 wt % of a polyolefin, and incorporated in said polyolefin −0.1-10 wt % of an ethylene-vinyl alcohol polymer containing between 27 mol % and 44 mol % of ethylene units; 0.1-5 wt % of an active oxygen scavenger; 0.1-10 wt % of either a clay having an aspect ratio of at least 10, preferably at least 20, more preferably at least 50, or a nucleating agent, or a polyamide optionally containing such a clay or nucleating agent; and 0.1-5 wt % of a compatibiliser.
摘要翻译: 描述了包含70-95重量%的聚烯烃的氧阻隔组合物,并且掺入所述聚烯烃-0.1-10重量%的含有27摩尔%至44摩尔%的乙烯单元的乙烯 - 乙烯醇聚合物; 0.1-5重量%的活性氧清除剂; 0.1-10重量%的纵横比为至少10,优选至少20,更优选至少为50的粘土或成核剂,或任选含有这种粘土或成核剂的聚酰胺; 和0.1-5wt%的增容剂。
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公开(公告)号:US07335710B2
公开(公告)日:2008-02-26
申请号:US11347237
申请日:2006-02-06
IPC分类号: C08F4/6392 , C08F4/6592
CPC分类号: C08F210/16 , C08F4/65912 , C08F4/65916 , C08F4/6592 , C08F4/65908 , C08F2/34
摘要: A process for the polymerisation of olefins is described involving the use of a catalyst system comprising a supported transition metal compound and an activator based on an organoborane and an aluminoxane. Preferably the transition metal compound is a metallocene complex. The support is pretreated with an organoaluminium compound and the process is particularly suitable for the gas phase preparation of copolymers of ethylene and alpha-olefins having a molecular weight distribution in the range 2.5-7.0 and a melt strength in the range 3-12 cN.
摘要翻译: 描述了用于烯烃聚合的方法,涉及使用包含负载的过渡金属化合物和基于有机硼烷和铝氧烷的活化剂的催化剂体系。 优选地,过渡金属化合物是茂金属络合物。 该载体用有机铝化合物预处理,该方法特别适用于分子量分布范围为2.5-7.0,熔体强度在3-12cN范围内的乙烯和α-烯烃共聚物的气相制备。
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公开(公告)号:US07968659B2
公开(公告)日:2011-06-28
申请号:US11883162
申请日:2006-01-27
申请人: Choon Kooi Chai
发明人: Choon Kooi Chai
IPC分类号: C08F210/16 , C08F4/6592
CPC分类号: C08F210/16 , C08F210/14 , C08F2500/12 , C08F2500/08 , C08F2500/20 , C08F2500/09 , C08F2500/26
摘要: Copolymers of ethylene and an alpha-olefin having (a) a density in the range 0.900-0.940 g/cm3, (b) a molecular weight distribution (Mw/Mn) in the range 3.5 to 4.5, (c) a melt elastic modulus G′ (G″=500 Pa) in the range 40 to 150 Pa, (d) an activation energy of flow (Ea) in the range 28-45 kJ/mol, and (e) a melt index (g/10 ml) in the range 1.0-3.5. The copolymers are suitably prepared in the gas phase by use of a supported metallocene catalyst system. The copolymers show improved processability and are particular suitable for use in blown film applications.
摘要翻译: (a)密度在0.900-0.940g / cm3范围内的乙烯和α-烯烃的共聚物,(b)分子量分布(Mw / Mn)在3.5至4.5的范围内,(c)熔体弹性模量 G'(G“= 500Pa),(d)流动活化能(Ea)在28-45kJ / mol的范围内,(e)熔体指数(g / )在1.0-3.5范围内。 共聚物通过使用负载的茂金属催化剂体系在气相中合适地制备。 共聚物显示出改善的加工性,并且特别适用于吹塑薄膜应用。
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公开(公告)号:US20110009580A1
公开(公告)日:2011-01-13
申请号:US12805991
申请日:2010-08-27
申请人: Choon Kooi Chai
发明人: Choon Kooi Chai
IPC分类号: C08F210/16 , C08F4/76
CPC分类号: C08F4/76 , C08F210/16 , C08F210/14 , C08F2500/12 , C08F2500/07 , C08F2500/04 , C08F2500/13
摘要: A copolymer of ethylene and an alpha-olefin, said copolymer having a (a) density>0.930 g/cm3, (b) melt index (g/10 min)>4, (c) molecular weight distribution (MWD)>3.0, and (d) FNCT>250 hours., and is described suitable for use in rotomoulding applications. In particular the novel copolymers result in improved impact strength, improved permeation resistance and improved environmetal stress crack resistance and may suitably be prepared by use of metallocene catalysts.
摘要翻译: 乙烯和α-烯烃的共聚物,所述共聚物具有(a)密度> 0.930g / cm 3,(b)熔体指数(g / 10min)> 4,(c)分子量分布(MWD)> 3.0, 和(d)FNCT> 250小时,并被描述适用于滚塑应用。 特别地,新型共聚物具有改善的冲击强度,改进的耐渗透性和改善的耐环境应力开裂性,并且可以适当地使用茂金属催化剂来制备。
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