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141.发明申请公开(公告)号：US20200308378A1
公开(公告)日：2020-10-01
申请号：US16363221
申请日：2019-03-25
发明人： Jeremy M. Praetorius , Chung Ching Tso , Ashish M. Sukhadia , Yongwoo Inn , Qing Yang , John T. Blagg
摘要： Disclosed are ethylene polymer compositions containing a homogeneously-branched first ethylene polymer component and 15-35 wt. % of 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 ratio of Mw/Mn from 2 to 5, a melt index less than 2 g/10 min, and a CY-a parameter at 190 ° C. from 0.35 to 0.7. 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. Further, methods for improving film Elmendorf tear strength also are described.
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142.发明授权公开(公告)号：US10679734B2
公开(公告)日：2020-06-09
申请号：US16006899
申请日：2018-06-13
发明人： Richard M. Buck , Qing Yang
IPC分类号： G01N21/33 , C08F4/653 , C08F4/6592 , G16C20/10 , B01J31/22 , G01N21/31 , G06F17/17 , C08F2/01 , C08F2/00 , G05B13/04 , B01J19/24 , B01J19/18 , B01J19/00 , C08F10/02 , 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：US10550208B2
公开(公告)日：2020-02-04
申请号：US16249975
申请日：2019-01-17
发明人： Qing Yang , Tony R. Crain , George R. Rajaendran
IPC分类号： C08F4/6592 , C08F210/16 , C08F10/02 , C08F4/659 , C07F17/00 , C08F4/6392
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：US10544273B2
公开(公告)日：2020-01-28
申请号：US16459656
申请日：2019-07-02
发明人： Jeremy M. Praetorius , Chung C. Tso , Qing Yang , Yongwoo Inn , John T. Blagg , Ashish M. Sukhadia
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：US20190144572A1
公开(公告)日：2019-05-16
申请号：US16249975
申请日：2019-01-17
发明人： Qing Yang , Tony R. Crain , George R. Rajaendran
IPC分类号： C08F10/02 , C08F4/6392 , C08F4/6592 , C07F17/00
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：US20190100606A1
公开(公告)日：2019-04-04
申请号：US15723225
申请日：2017-10-03
发明人： Errun Ding , Chung C. Tso , Randall S. Muninger , Qing Yang , Youlu Yu , Yongwoo Inn
IPC分类号： C08F4/6192 , C08F4/64 , C08F10/02 , C08F210/16
CPC分类号： C08F4/6192 , C08F4/64 , C08F4/65904 , C08F4/65912 , C08F4/65916 , C08F4/6592 , C08F4/65927 , C08F10/02 , C08F210/16 , C08F2410/01 , C08F2420/04 , C08F2500/01 , C08J5/18 , C08J2323/08 , C08L23/0815 , C08L2207/068 , C08F210/14 , C08F2500/04 , C08F2500/08 , C08F2500/10 , C08F2500/12 , C08F2500/17 , C08F2500/26
摘要： Disclosed herein are ethylene-based polymers generally characterized by a density from 0.89 to 0.93 g/cm3, a ratio of Mw/Mn from 3 to 6.5, a Mz from 200,000 to 650,000 g/mol, a CY-a parameter at 190° C. from 0.2 to 0.4, and a reverse short chain branching distribution. The ATREF profile of these polymers can have a high temperature peak from 92 to 102° C., and a low temperature peak from 18 to 36° C. less than that of the high temperature peak. These polymers can have comparable physical properties to that of a metallocene-catalyzed LLDPE, but with improved processability, shear thinning, and melt strength, and can be used in blown film and other end-use applications.
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公开(公告)号：US10221258B2
公开(公告)日：2019-03-05
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： C07F17/00 , C08F4/6592 , C08F10/02 , C08F4/6392
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：US10118873B2
公开(公告)日：2018-11-06
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
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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公开(公告)号：US10059783B2
公开(公告)日：2018-08-28
申请号：US15421510
申请日：2017-02-01
发明人： Kensha M. Clark , Qing Yang , Gary L. Glass
IPC分类号： C08F4/6592 , C08F210/16 , C08F110/02 , B01J37/04 , C08F10/00 , C08F4/659
CPC分类号： C08F110/02 , B01J37/04 , C08F4/65912 , C08F4/65916 , C08F4/6592 , C08F10/00 , C08F210/16 , C08F4/65927
摘要： Methods for preparing metallocene-based catalyst systems containing an activator-support are disclosed. These methods can include contacting a solid metallocene compound, an activator-support, and an organoaluminum compound, resulting in catalyst systems with increased catalytic activity as compared to catalyst systems utilizing a solution of the metallocene compound.
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公开(公告)号：US09884930B2
公开(公告)日：2018-02-06
申请号：US15268668
申请日：2016-09-19
发明人： Kensha Marie Clark , Qing Yang , Gary L. Glass
IPC分类号： C08F4/649 , C08F4/6592 , C08F10/00 , C08F210/16 , C08F110/02 , C08F4/659
CPC分类号： C08F210/16 , C08F4/649 , C08F4/65912 , C08F4/65916 , C08F4/6592 , C08F110/02 , C08F4/65925 , C08F4/65927
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.
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