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公开(公告)号：US06753390B2
公开(公告)日：2004-06-22
申请号：US10368786
申请日：2003-02-18
Applicant: Fred David Ehrman , Michael Elroy Muhle , Pradeep Pandurang Shirodkar , Keith Wesley Trapp
Inventor： Fred David Ehrman , Michael Elroy Muhle , Pradeep Pandurang Shirodkar , Keith Wesley Trapp
IPC: C08F234
CPC classification number: C08F10/00 , C08F4/65912 , C08F4/65916 , C08F4/65925 , C08F210/16 , Y10S526/901 , Y10S526/905 , C08F4/65904 , C08F2/34 , C08F210/14 , C08F2500/07 , C08F2500/12 , C08F2500/18
Abstract: A gas phase polymerization process for producing a polyolefin composition is described, which includes passing a gaseous stream containing hydrogen gas and one or more monomers, including ethylene monomers, through a reactor that includes a fluidized bed, under reactive conditions, in the presence of a catalyst that includes metallocene, to provide a polyolefin composition, wherein in one embodiment the fluidized bulk density is 60% or more of the settled bulk density (or, a voidage of 40% or less); and wherein the voidage is controlled by a number of factors including, in certain embodiments, (a) the reactor temperature being maintained at 100° C. or below; (b) the molar ratio of hydrogen gas to ethylene introduced into the reactor being 0.015 or below.
Abstract translation: 描述了一种用于生产聚烯烃组合物的气相聚合方法，其包括在反应条件下，在反应条件下，将含有氢气和一种或多种单体（包括乙烯单体）的气流通过包含流化床的反应器 包括茂金属的催化剂，以提供聚烯烃组合物，其中在一个实施方案中，流化体积密度为沉降堆积密度（或空隙率为40％以下）的60％或更多。 并且其中所述空隙率由许多因素控制，包括在某些实施方案中，（a）反应器温度保持在100℃或更低; （b）引入反应器的氢气与乙烯的摩尔比为0.015以下。
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公开(公告)号：US06878454B1
公开(公告)日：2005-04-12
申请号：US10781404
申请日：2004-02-18
Applicant: Porter C. Shannon , Rakesh Kumar , Pradeep Pandurang Shirodkar , Fred David Ehrman , Mark B. Davis , Keith Wesley Trapp , Dongming Li
Inventor： Porter C. Shannon , Rakesh Kumar , Pradeep Pandurang Shirodkar , Fred David Ehrman , Mark B. Davis , Keith Wesley Trapp , Dongming Li
IPC: C08F210/16 , C08L23/08 , C08F10/02
CPC classification number: C08L23/0815 , C08F210/16 , C08L2205/02 , C08L2205/025 , C08L2666/06 , C08F210/08 , C08F2500/12 , C08F2500/02 , C08F2500/01 , C08F2500/05 , C08F2500/26
Abstract: A film comprising a polyethylene composition, the polyethylene composition in one embodiment comprising a high molecular weight component having a weight average molecular weight of greater than 50,000 amu and a low molecular weight component having a weight average molecular weight of less than 50,000 amu; the polyethylene composition possessing a density of between 0.940 and 0.970 g/cm3, and an I21 value of less than 20 dg/min; characterized in that the polyethylene composition extrudes at an advantageously high specific throughput at an advantageously low melt temperature, and wherein the film has a gel count of less than 100.
Abstract translation: 一种包含聚乙烯组合物的膜，一个实施方案中的聚乙烯组合物包含重均分子量大于50,000amu的高分子量组分和重均分子量小于50,000amu的低分子量组分; 聚乙烯组合物的密度为0.940〜0.970g / cm 3，I21值小于20dg / min; 其特征在于，所述聚乙烯组合物在有利的低熔融温度下以有利的高比生产量挤出，并且其中所述膜的凝胶计数小于100。
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公开(公告)号：US07101629B2
公开(公告)日：2006-09-05
申请号：US11008021
申请日：2004-12-09
Applicant: Porter C. Shannon , Rakesh Kumar , Pradeep Pandurang Shirodkar , Fred David Ehrman , Mark B. Davis , Keith Wesley Trapp , Dongming Li
Inventor： Porter C. Shannon , Rakesh Kumar , Pradeep Pandurang Shirodkar , Fred David Ehrman , Mark B. Davis , Keith Wesley Trapp , Dongming Li
CPC classification number: C08L23/0815 , C08F210/16 , C08L2205/02 , C08L2205/025 , C08L2666/06 , C08F210/08 , C08F2500/12 , C08F2500/02 , C08F2500/01 , C08F2500/05 , C08F2500/26
Abstract: A film comprising a polyethylene composition, the polyethylene composition in one embodiment comprising a high molecular weight component having a weight average molecular weight of greater than 50,000 amu and a low molecular weight component having a weight average molecular weight of less than 50,000 amu; the polyethylene composition possessing a density of between 0.940 and 0.970 g/cm3, and an I21 value of less than 20 dg/min; characterized in that the polyethylene composition extrudes at an advantageously high specific throughput at an advantageously low melt temperature, and wherein the film has a gel count of less than 100.
Abstract translation: 一种包含聚乙烯组合物的膜，一个实施方案中的聚乙烯组合物包含重均分子量大于50,000amu的高分子量组分和重均分子量小于50,000amu的低分子量组分; 所述聚乙烯组合物具有0.940至0.970g / cm 3的密度和小于20dg / min的I 21 N值; 其特征在于，所述聚乙烯组合物在有利的低熔融温度下以有利的高比生产量挤出，并且其中所述膜的凝胶计数小于100。
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公开(公告)号：US07090927B2
公开(公告)日：2006-08-15
申请号：US11007863
申请日：2004-12-09
Applicant: Porter C. Shannon , Rakesh Kumar , Pradeep Pandurang Shirodkar , Fred David Ehrman , Mark B. Davis , Keith Wesley Trapp , Dongming Li
Inventor： Porter C. Shannon , Rakesh Kumar , Pradeep Pandurang Shirodkar , Fred David Ehrman , Mark B. Davis , Keith Wesley Trapp , Dongming Li
CPC classification number: C08L23/0815 , C08F210/16 , C08L2205/02 , C08L2205/025 , C08L2666/06 , C08F210/08 , C08F2500/12 , C08F2500/02 , C08F2500/01 , C08F2500/05 , C08F2500/26
Abstract: A film comprising a polyethylene composition, the polyethylene composition in one embodiment comprising a high molecular weight component having a weight average molecular weight of greater than 50,000 amu and a low molecular weight component having a weight average molecular weight of less than 50,000 amu; the polyethylene composition possessing a density of between 0.940 and 0.970 g/cm3, and an I21 value of less than 20 dg/min; characterized in that the polyethylene composition extrudes at an advantageously high specific throughput at an advantageously low melt temperature, and wherein the film has a gel count of less than 100.
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