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公开(公告)号：US10131725B2
公开(公告)日：2018-11-20
申请号：US15807665
申请日：2017-11-09
发明人： Kensha Marie Clark , Qing Yang , Gary L. Glass
IPC分类号： C08F4/649 , C08F4/6592 , C08F210/16 , C08F4/659 , C08F110/02
摘要： Methods for preparing metallocene-based catalyst systems containing an activator-support are disclosed. These methods are directed to contacting an activator-support, an organoaluminum compound, and a mixture containing a metallocene compound and cyclohexene or a mixture of cyclohexane and 1-hexene, resulting in catalyst systems with increased catalytic activity for the polymerization of olefins. The olefin polymers can be used to produce film products with high haze values.
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公开(公告)号：US10118975B2
公开(公告)日：2018-11-06
申请号：US15673456
申请日：2017-08-10
IPC分类号： C07F17/00 , C08F4/6592 , C08F10/00 , C08F4/659
摘要： Disclosed herein are catalyst compositions containing bicyclic bridged metallocene compounds. These catalyst compositions can be used for the polymerization of olefins. For example, ethylene polymers produced using these catalyst compositions can be characterized by low molecular weights and high melt flow rates, and can be produced without the addition of hydrogen.
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公开(公告)号：US10113016B2
公开(公告)日：2018-10-30
申请号：US15428183
申请日：2017-02-09
发明人： Ashish M. Sukhadia , Max P. McDaniel , Errun Ding , Guylaine St. Jean , Qing Yang , Daniel G. Hert , Chung Ching Tso
IPC分类号： C08F10/02 , C08F210/16 , C08J5/18 , C08L23/08 , C08F210/02 , C08F210/08 , C08F210/14 , C08F4/659 , C08F4/6592
摘要： Disclosed herein are ethylene-based polymers produced using dual metallocene catalyst systems. These polymers have low densities, high molecular weights, and broad molecular weight distributions, as well as having the majority of the long chain branches in the lower molecular weight component of the polymer, and the majority of the short chain branches in the higher molecular weight component of the polymer. Films produced from these polymers have improved impact and puncture resistance.
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公开(公告)号：US20180265606A1
公开(公告)日：2018-09-20
申请号：US15461523
申请日：2017-03-17
发明人： Qing Yang , Tony R. Crain , George R. Rajaendran
IPC分类号： C08F10/02
CPC分类号： C08F10/02 , C07F17/00 , C08F4/63925 , C08F4/6592 , C08F2420/01
摘要： Methods for treating solid metallocene compounds that are exposed to air are disclosed. These methods include a step of contacting the exposed solid metallocene compound with a purging gas stream containing an inert gas, and optionally, subjecting the exposed solid metallocene compound to a sub-atmospheric pressure.
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公开(公告)号：US09975976B1
公开(公告)日：2018-05-22
申请号：US15489663
申请日：2017-04-17
发明人： Chung Tso , Jared L. Barr , Kelly Frey , Carlos A. Cruz , Youlu Yu , Bill Bridendolph , Qing Yang , Yongwoo Inn , William Fisher , Max P. McDaniel , Ashish M. Sukhadia , Brandy Rutledge-Ryal , Daniel G. Hert
IPC分类号： C08F210/16 , C09D123/08 , C08J7/04 , B32B7/00 , B32B27/32 , B32B37/15 , C08F210/14
CPC分类号： C08F210/16 , B29C47/025 , B32B7/005 , B32B27/327 , B32B37/153 , B32B2250/02 , B32B2307/72 , B32B2323/046 , C08F210/14 , C08F2500/26 , C08J7/047 , C08J2323/20 , C09D123/0815
摘要： A polyolefin having a density of greater than about 0.930 g/ml which when extruded at a temperature in the range of from about 590° F. to about 645° F. and then coated onto a substrate at a rate of from about 300 ft/min to about 1000 ft/min has an edge weave of from about 0 in/side to about 2.5 in/side and a neck-in of less than about 3.0 in/side.
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公开(公告)号：US09926393B2
公开(公告)日：2018-03-27
申请号：US15622114
申请日：2017-06-14
发明人： Errun Ding , Chung C. Tso , Youlu Yu , Qing Yang , Richard M. Buck
IPC分类号： C08F4/00 , C08F210/00 , C08F210/02 , C08F210/16 , C08F4/659
CPC分类号： C08F210/02 , C08F4/65912 , C08F210/16 , C08F4/65904 , C08F4/6592 , C08F210/14 , C08F2500/12 , C08F2500/17 , C08F110/02
摘要： Catalyst systems having both a metallocene catalyst component and a Ziegler-Natta component are disclosed. Such catalyst systems can contain a metallocene compound, an activator-support, an organoaluminum compound, and a Ziegler-Natta component comprising titanium supported on magnesium chloride.
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公开(公告)号：US20180044454A1
公开(公告)日：2018-02-15
申请号：US15792271
申请日：2017-10-24
IPC分类号： C08F210/16 , C08L23/08 , C08F4/659 , C08F4/6592
CPC分类号： C08F210/16 , C08F4/65912 , C08F4/65916 , C08F4/65925 , C08F4/65927 , C08L23/0815 , C08L2203/18 , C08L2205/025 , C08L2312/00 , C08F4/65904 , C08F210/14 , C08F2500/12 , C08F2500/17
摘要： A crosslinked metallocene-catalyzed polyethylene copolymer having a higher molecular weight (HMW) component and lower molecular weight (LMW) component wherein the HMW component is present in an amount of from about 10 wt. % to about 30 wt. % and wherein the LMW component is present in an amount of from about 70 wt. % to about 90 wt. %.
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公开(公告)号：US09845367B2
公开(公告)日：2017-12-19
申请号：US14863698
申请日：2015-09-24
发明人： Errun Ding , Jeffrey F. Greco , Qing Yang , Youlu Yu
IPC分类号： C08F210/16
CPC分类号： C08F210/16 , C08F210/14 , C08F2500/04 , C08F2500/10 , C08F4/6543 , C08F4/025
摘要： Catalyst systems containing a Ziegler-Natta catalyst component are disclosed. Such catalyst systems can contain a co-catalyst and a supported catalyst containing a fluorided silica-coated alumina, a magnesium compound, and vanadium and/or tetravalent titanium.
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公开(公告)号：US09650459B2
公开(公告)日：2017-05-16
申请号：US14848405
申请日：2015-09-09
发明人： Jeff F Greco , Qing Yang , Vivek Rohatgi , Mark L. Hlavinka , Jim B Askew
IPC分类号： C08F4/653 , C08F4/6592 , C08F210/02 , C08F210/14 , C08F4/659 , C08F210/16
CPC分类号： C08F210/14 , C08F4/65904 , C08F4/65916 , C08F210/02 , C08F210/16 , C08F4/65927 , C08F4/65925 , C08F210/10 , C08F2500/14 , C08F2500/05
摘要： Methods for controlling the die swell of an olefin polymer produced using a dual catalyst system are disclosed. The die swell of the olefin polymer can be increased or decreased as a function of the catalyst weight ratio and the reactant molar ratio used during the olefin polymerization process.
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公开(公告)号：US09637573B2
公开(公告)日：2017-05-02
申请号：US15051173
申请日：2016-02-23
IPC分类号： C08F210/16 , C08F10/14 , F16L9/127 , F16L9/12 , C08F4/659 , C08F4/6592
CPC分类号： C08F10/14 , C08F4/65912 , C08F4/65927 , C08F210/16 , C08F2500/05 , C08F2500/09 , C08F2500/10 , C08L2203/18 , C08L2205/02 , F16L9/12 , F16L9/127 , C08F210/14 , C08F2500/01 , C08F2500/04 , C08F2500/07 , C08F2500/17 , C08F4/64158 , C08F4/65904
摘要： A polymer reactor-blend comprising at least a first component having a polydispersity index of greater than about 20 and is present in an amount of from about 1 wt. % to about 99 wt. % based on the total weight of the polymer and a second component having a polydispersity index of less than about 20 and is present in an amount of from about 1 wt. % to about 99 wt. % based on the total weight of the polymer wherein a molecular weight distribution of the second component lies within a molecular weight distribution of the first component.
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