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公开(公告)号：US20210395413A1
公开(公告)日：2021-12-23
申请号：US17466696
申请日：2021-09-03
发明人： Graham R. Lief , Qing Yang , Eric J. Haschke
IPC分类号： C08F210/16 , C07F17/00 , C08F4/6592
摘要： Disclosed are metallocene compounds, catalyst compositions comprising at least one metallocene compound, processes for polymerizing olefins, methods for making catalyst compositions, olefin polymers and articles made from olefin polymers. In an aspect, a metallocene compound and catalyst composition are disclosed in which the metallocene contains at least one indenyl ligand, the indenyl ligand containing at least one halogenated substituent, such as a fluorinated substituent. These metallocene compounds and catalyst compositions can produce polyethylene having unexpectedly low levels of short chain branching.
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112.发明授权公开(公告)号：US11170874B2
公开(公告)日：2021-11-09
申请号：US16808492
申请日：2020-03-04
发明人： Richard M. Buck , Qing Yang
IPC分类号： G16C20/10 , B01J31/22 , G01N21/31 , G06F17/17 , C08F2/01 , C08F2/00 , G05B13/04 , B01J19/24 , B01J19/18 , B01J19/00 , C08F10/02 , G01N21/33 , C08F6/02
摘要： Methods for simultaneously determining the concentrations of transition metal compounds in solutions containing two or more transition metal compounds are described. Polymerization reactor systems providing real-time monitoring and control of the concentrations of the transition metal components of a multicomponent catalyst system are disclosed, as well as methods for operating such polymerization reactor systems, and for improving methods of preparing the multicomponent catalyst system.
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公开(公告)号：US10927201B2
公开(公告)日：2021-02-23
申请号：US16554784
申请日：2019-08-29
发明人： Errun Ding , Chung C. Tso , Youlu Yu , Qing Yang , Richard M. Buck
IPC分类号： C08F210/02 , C08F210/16 , C08F4/659
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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114.发明申请公开(公告)号：US20200023331A1
公开(公告)日：2020-01-23
申请号：US16587149
申请日：2019-09-30
发明人： Richard M. Buck , Qing Yang
IPC分类号： B01J8/08 , C08F4/6192 , B01J12/00 , G01N21/31 , G05D7/06 , C08F10/14 , C08F10/04 , C08F10/02
摘要： Methods for simultaneously determining the concentrations of transition metal compounds in solutions containing two or more transition metal compounds are described. Polymerization reactor systems providing real-time monitoring and control of the concentrations of the transition metal components of a multicomponent catalyst system are disclosed, as well as methods for operating such polymerization reactor systems.
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115.发明授权公开(公告)号：US10507445B2
公开(公告)日：2019-12-17
申请号：US15939446
申请日：2018-03-29
发明人： Richard M. Buck , Qing Yang
IPC分类号： C08F4/6192 , C08F10/14 , C08F10/04 , C08F10/02 , B01J8/08 , B01J12/00 , G01N21/31 , G05D7/06
摘要： Methods for simultaneously determining the concentrations of transition metal compounds in solutions containing two or more transition metal compounds are described. Polymerization reactor systems providing real-time monitoring and control of the concentrations of the transition metal components of a multicomponent catalyst system are disclosed, as well as methods for operating such polymerization reactor systems.
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公开(公告)号：US20190092912A1
公开(公告)日：2019-03-28
申请号：US15715215
申请日：2017-09-26
发明人： Jeremy M. Praetorius , Chung C. Tso , Qing Yang , Yongwoo Inn , John T. Blagg , Ashish M. Sukhadia
IPC分类号： C08J5/18
摘要： Disclosed are ethylene polymer compositions containing a homogeneously-branched first ethylene polymer component and a homogeneously-branched second ethylene polymer component of higher density than the first ethylene polymer component. The ethylene polymer composition can be characterized by a density from 0.912 to 0.925 g/cm3, a melt index less than 3.5 g/10 min, and a CY-a parameter at 190° C. from 0.25 to 0.65. These polymer compositions have the excellent dart impact strength and optical properties of a metallocene-catalyzed LLDPE, but with improved machine direction tear resistance, and can be used in blown film and other end-use applications.
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公开(公告)号：US10184018B2
公开(公告)日：2019-01-22
申请号：US15379571
申请日：2016-12-15
发明人： Mark L. Hlavinka , Qing Yang , Yongwoo Inn , William M. Whitte , John R. Rathman , Steven J. Secora , Daniel G. Hert
IPC分类号： C08F210/16 , C08F4/6592 , C08F4/653 , C08L23/08 , C08F4/659
摘要： Disclosed herein are ethylene-based polymers having a density greater than 0.945 g/cm3, a high load melt index less than 25 g/10 min, a peak molecular weight ranging from 52,000 to 132,000 g/mol, and an environmental stress crack resistance of at least 250 hours. These polymers have the processability of chromium-based resins, but with improved impact strength and stress crack resistance, and can be used in large-part blow molding applications.
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公开(公告)号：US20180162970A1
公开(公告)日：2018-06-14
申请号：US15890524
申请日：2018-02-07
发明人： Errun Ding , Chung C. Tso , Youlu Yu , Qing Yang , Richard M. Buck
IPC分类号： 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：US09994659B2
公开(公告)日：2018-06-12
申请号：US15792271
申请日：2017-10-24
IPC分类号： C08F210/16 , C08L23/08 , C08F4/65 , C08F4/6592 , C08F4/659
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：US20180127331A1
公开(公告)日：2018-05-10
申请号：US15860700
申请日：2018-01-03
发明人： Qing Yang , Uriah J. Kilgore , Max P. McDaniel , Brooke L. Small , Kenneth D. Hope , Eduardo J. Baralt
CPC分类号： C07C2/10 , C07C9/15 , C07C2521/04 , C07C2527/053 , C07C2527/06 , C07C2527/10 , C07C2527/12 , C07C11/02
摘要： The present invention discloses processes for oligomerizing a monomer containing C3 to C30 olefins using a chemically-treated solid oxide, such as fluorided silica-coated alumina and fluorided-chlorided silica-coated alumina.
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