-
公开(公告)号：US11208514B2
公开(公告)日：2021-12-28
申请号：US17124605
申请日：2020-12-17
IPC分类号： C08F210/16 , C08F10/02 , C08F110/02 , C08F210/06 , C08F210/08 , B01J27/00 , B01J27/12 , B01J27/16 , B01J31/14 , B01J31/16 , B01J31/18 , B01J31/22 , B01J35/00 , C08F4/6592 , B01J27/053 , B01J27/10 , C08F4/659
摘要： Silica-coated alumina activator-supports, and catalyst compositions containing these activator-supports, are disclosed. Methods also are provided for preparing silica-coated alumina activator-supports, for preparing catalyst compositions, and for using the catalyst compositions to polymerize olefins.
-
62.发明申请公开(公告)号：US20210388130A1
公开(公告)日：2021-12-16
申请号：US16898502
申请日：2020-06-11
发明人： Jeremy M. Praetorius , Alfred E. Brown, JR. , Yongwoo Inn , Youlu Yu , Qing Yang , Ashish M. Sukhadia
IPC分类号： C08F210/16 , B29C49/00 , C08F4/6592
摘要： Ethylene-based polymers are characterized by a melt index less than 1 g/10 min, a density from 0.94 to 0.965 g/cm3, a Mw from 100,000 to 250,000 g/mol, a relaxation time from 0.5 to 3 sec, and an average number of long chain branches (LCBs) per 1,000,000 total carbon atoms in a molecular weight range of 300,000 to 900,000 g/mol that is greater than that in a molecular weight range of 1,000,000 to 2,000,000 g/mol, or an average number of LCBs per 1,000,000 total carbon atoms in a molecular weight range of 1,000,000 to 2,000,000 g/mol of less than or equal to about 5 and a maximum ratio of ηE/3η at an extensional rate of 0.1 sec−1 from 1.2 to 10. These polymers have substantially no long chain branching in the high molecular weight fraction of the polymer, but instead have significant long chain branching in a lower molecular weight fraction, such that polymer melt strength and parison stability are maintained for the fabrication of blow molded products and other articles of manufacture. These ethylene polymers can be produced using a dual catalyst system containing a single or two atom bridged metallocene compound with two indenyl groups, and a single atom bridged metallocene compound with a fluorenyl group and a cyclopentadienyl group.
-
公开(公告)号：US11125680B1
公开(公告)日：2021-09-21
申请号：US17148818
申请日：2021-01-14
发明人： Qing Yang , Max P. McDaniel , Richard M. Buck , Tony R. Crain , Ryan N. Rose
IPC分类号： G01N21/25 , G01N21/29 , C08F110/02 , C08L23/06 , C08L23/08 , B01J19/24 , B01J8/18 , C08F2/01 , B01J8/00
摘要： Methods for determining the catalytic activity of an activated chemically-treated solid oxide using a color measurement technique are described, and these methods are integrated into transition metal-based catalyst preparation processes and systems, as well as into olefin polymerization processes and related polymerization reactor systems.
-
公开(公告)号：US10899855B2
公开(公告)日：2021-01-26
申请号：US16166224
申请日：2018-10-22
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： C08L23/08 , C08F210/16 , C08F4/6592 , C08F10/02 , C08J5/18 , C08F210/02 , C08F4/659 , C08F210/08 , C08F210/14
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.
-
公开(公告)号：US10654948B2
公开(公告)日：2020-05-19
申请号：US13799471
申请日：2013-03-13
发明人： Carlos A. Cruz , Qing Yang , Max P. McDaniel , Joel L. Martin , Tony R. Crain , Steve M. Wharry , Jared L. Barr , Youlu Yu
IPC分类号： C08F10/02 , C08F4/659 , C08F110/02
摘要： An ethylene polymer having a density greater than about 0.930 g/ml and a level of long chain branching ranging from about 0.001 LCB/103 carbons to about 1.5 LCB/103 carbons as determined by SEC-MALS. An ethylene polymer having a level of short chain branching ranging from about 0 to about 10 mol. % and a level of long chain branching ranging from about 0.001 LCB/103 carbons to about 1.5 LCB/103 carbons as determined by SEC-MALS. An ethylene polymer having a polydispersity index ranging from about 8 to about 25 and a level of long chain branching ranging from about 0.001 LCB/103 carbons to about 1.5 LCB/103 carbons as determined by SEC-MALS.
-
公开(公告)号：US10577440B2
公开(公告)日：2020-03-03
申请号：US14933847
申请日：2015-11-05
发明人： Carlos A. Cruz , Max P. McDaniel , Qing Yang , Jared L. Barr , Youlu Yu
IPC分类号： C08F10/02
摘要： A radically coupled polymer having a density of from about 0.915 g/ml to about 0.975 g/ml characterized by a crossover modulus measured in Pascals (Pa) that is equal to or less than ymn where ymn=180,000e−0.15x and x is the number average molecular weight of the radically coupled polymer divided by 1,000. An ethylene polymer having a level of short chain branching ranging from about 0 to about 10 mol. %; a level of long chain branching ranging from about 0.001 LCB/103 carbons to about 1.5 LCB/103 carbons as determined by SEC-MALS; and characterized by a crossover modulus measured in Pa that is equal to or less than ymn where ymn=180,000−0.15x and x is the number average molecular weight of the radically coupled polymer divided by 1,000.
-
公开(公告)号：US20190322823A1
公开(公告)日：2019-10-24
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.
-
公开(公告)号：US10435492B2
公开(公告)日：2019-10-08
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
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.
-
69.发明申请公开(公告)号：US20190303539A1
公开(公告)日：2019-10-03
申请号：US16006899
申请日：2018-06-13
发明人： Richard M. Buck , Qing Yang
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.
-
公开(公告)号：US10358506B2
公开(公告)日：2019-07-23
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： C08F4/653 , C08F4/6592 , C08F210/16 , C08L23/08 , C08F4/6192 , C08F4/64 , C08F10/02 , C08F4/659
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.
-
-
-
-
-
-
-
-
-
搜索结果
267 条记录 (耗时 0.044 秒)